Improved design adapted for all kinds of work and specially constructed for different qualities of gas

- - MANCHESTER ENCLAND
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  - National Gas Engines
  - Improved
  - Design
  - ADAPTED FOR ALL KINDS OF WORK AND SPECIALLY CONSTRUCTED FOR DIFFERENT QUALITIES OF GAS
  - Massive Strength First-Class Workmanship Improved Designs Unequalled Efficiency Incomparable Simplicity
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  - Wellington Works, Ashton
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  - August, 1919.
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- - VIEW OF WELLINGTON WORKS AND HEAD OFFICES OF THE NATIONAL GAS ENGINE CO., LTD.
  - The Largest Establishment in the world devoted exclusively to the manufacture of Gas and Oil Engines.
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- - The National Gas Engine Company, Limited
  - Directors i
  - HENRY NIELD BICKERTON, J.P., M.I.M.E .,
  - Chairman and Managing Director.
  - HENRY PRESCOTT, Vice-Chairman.
  - DUGALD CLERK, F.R.S., M.Inst.C.E., F.C.S., &c.
  - E. WHALLEY,
  - RICHARD BICKERTON.
  - KENNETH S. PRESCOTT,
  - JOHN ORME.
  - Secretary.
  - A.M.I.Mech.E.
  - THE fine modern works of the National Gas Engine Co., Ltd., are most favourably situated at the west end of the town of Ashton-under-Eyne. They are effectively served by five of the leading railways, which give easy access to all the industrial parts of the country and to the principal shipping ports. The works occupy nearly 30 acres, and in every department are replete with the best machine tools and appliances for producing sound work in the best possible manner. In addition to the extensive Machine and Erecting Shops which are acknowledged to be the best of their kind, there is a large and well-arranged foundry in wlrch are made all the iron and brass castings used in the manufacture of National Gas Engines.
  - The power required for driving the works and for electrical energy is derived from National Gas Engines.
  - Proper facilities are provided for carefully testing every engine before despatch from the works, and the great care which is exercised to ensure perfect work on each individual engine is one of the most important characteristics of the management and organisation. As a further safeguard to the Company’s clients, all engines are sold under a suitable twelve months’ guarantee aga’nst faulty material or workmanship.
  - NATIONAL GAS ENGINES are the embodiment of SOUND DESIGN. FIRST-CLASS MATERIAL. EXCELLENT WORKMANSHIP.
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- - Introduction
  - NATIONAL GAS ENGINES were first introduced to the public in 1889, and have met with a steady and continuously growing demand ever since. Their all-round excellence has placed them in the very front rank, and they enjoy the highest reputation throughout the world. Such is the satisfaction given to purchasers of National engines that, in spite of repeated additions to the Company’s splendid works at Ashton-under-Eyne, the demand has been continuously in advance of the supply, even during times of trade depression when other gas engine makers have not been fully employed.
  - National engines are now being made in convenient sizes from 2 B.H.P. to 1500 B.H.P. : they have been so designed as to use all kinds of gases and on various classes of work, and their record is one of uninterrupted success. This success has been attained through the policy of specialising in the manufacture of gas engines, and thus being able to give our clients an engine superior in design, workmanship, and actual efficiency to the alternatives offered by our competitors.
  - The Board of Directors, all the members of which are large shareholders in the Company, give active personal supervision of its affairs, and besides being themselves acknowledged, experts in gas-engine work, they are assisted by a large and experienced staff. The principle of personal management will be appreciated by all who have dealings with the Company. In addition to the Head Office
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- - organization, the Company has established branch offices in all the principal centres of the kingdom, which are in charge of capable and responsible managers who make it their sole duty to attend to orders for National engines. Under such a system it is impossible for the interests of clients to be neglected.
  - The Directors are determined to continue their past progressive policy of manufacturing the very best engine available, and they have pleasure in hereby calling attention to the latest designs of National engines, which embody many important new patents and improvements. They feel sure that if these improvements are compared point by point with engines offered by other makers, it will be seen that
  - the new National engine still maintains an easy lead over all others.
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- - Showrooms and Depots
  - LONDON ... MANCHESTER SHEFFIELD BIRMINGHAM GLASGOW ...
  - NEWCASTLE-ON-TYNE
  - LIVERPOOL LEEDS DUBLIN BELFAST ... BRISTOL ... NOTTINGHAM DUNDEE ...
  - 75a, Queen Victoria Street ...
  - 3, Victoria Street 9, St. James’ Row ...
  - Paradise Street Buildings, Easy Row
  - 195, St. Vincent Street
  - Milburn House
  - 15, Brunswick Street
  - 68 New Briggate
  - 186, Great Brunswick Street
  - 31, Donegall Street..............
  - 55, Baldwin Street ...
  - 11, St. Peter’s Gate ... .......
  - 8, Whitehall Crescent
  - Telegraphic Address.
  - “ Forgerons,” London
  - Ignition, ’ ’ Sheffield ...
  - “ Ignition,” Birmingham “ Ignition,” Glasgow ...
  - ” Ignition,” Newcastle-on-Tyne ‘ ‘ Noiseless, ’ ’ Liverpool “ Ignition,” Leeds “ Ignition,” Dublin “ Noiseless,” Belfast ...
  - ” Noiseless,” Bristol ...
  - " Noiseless,” Nottingham ” Ignition,” Dundee ...
  - Telephone No,
  - 8437 & 8438 Bank, London 2209 Manchester 2829 Central, Sheffield 410 Central
  - 2717-2718 Central, Glasgow
  - 820 Central, Newcastle-on-Tyne
  - 7997 Central, Liverpool
  - 23571 Leeds
  - 1427 Dublin
  - 1671 Belfast
  - 1782 Bristol
  - 1901 Nottingham
  - 1612 Dundee
  - FRANCE BRUSSELS ... AMSTERDAM ...
  - ITALY .....
  - ROUMANIA ... AUSTRALIA ... SOUTH AFRICA MALAY STATES NEW ZEALAND
  - La Compagnie des Moteurs “National,” 138, Boulevard Richard Lenoir, PARIS La Compagnie des Moteurs “ National,” 177, Rue de Laeken, BRUSSELS, Belgium Damrak, No. 49 (Mr. J. C. Harten).
  - Francesco Casali & Eigli, Suzzara, and Branches Societatea Anonima Romana de Comert, BUCHAREST Arthur Leplastrier & Co., Circular Quay East, SYDNEY
  - Stewarts and Lloyds (South Africa), Limited, Broad Street Chambers, Birmingham Guthrie & Co., Ltd., 5, Whittington Avenue, Leadenhall Street, LONDON, E.C.
  - J. J. Niven & Co., Ltd., 38, Lime Street, LONDON, E.C.
  - Branches and Agencies also in Russia, Spain, other European Countries, and in the Colonies.
  - Telephone No. : 425 (Five Lines) Ashton-under-Lyne
  - Works and Head Offices s
  - Wellington Road, Ashton-under-Lyne
  - Where all communications 0} importance should be addressed, and all remittances made.
  - Telegraphic Address “ NATIONAL” Ashton-under-Lyne
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- - Standard Mill Engine, Large Vertical Engine,
  - 150 B.H.P, 300 to 1500 B.H.P.
  - TYPES OF STANDARD NATIONAL ENGINES.
  - OUR EXPERIENCE ALWAYS AT YOUR SERVICE.
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- - WELLINGTON WORKS, ASHTON-UNDER-LYNE
  - Interior View of one of 20 Bays in our works devoted exclusively to the manufacture of National Gas Engines.
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- - Standard Engines for Small-Power Users
  - 2 TO 7 BRAKE H.P.
  - have made many thousands of these engines, and owing to their perfect construction and satisfactory working they have greatly assisted in building up our reputation. We specially mention this fact because there are many inferior designs of small engines on the market which have been constructed primarily for cheapness. This cheapness has been obtained by the sacrifice of the special points which our great experience has shewn us to be essential for reliable working.
  - Intending purchasers of small engines therefore should bear in mind that the extra value which we give in our small engines is far more than is represented by the difference between our prices and those of the cheap but inferior engines to which we have referred.
  - Our engines are so simple that any boy or girl of average intelligence can attend to them without trouble. The working parts are few, whilst the finish and workmanship are of exactly the same high character as in our largest engines.
  - We specialty recommend our new engine (see illustration on page 12), which develops from 4 to 7 Effective H.P., according to the speed, for all purposes where a small motor is required. It will be found most economical and reliable. The working parts are totally enclosed, and run in an oil bath, which automatically ensures complete lubrication as soon as the engine is started up.
  - This type of engine is used for driving fans and gas exhausters, shafting, organ blowers, domestic appliances, food-preparing machines, cash registers, etc,, etc.
  - When fitted with heavy fly-wheel it is suitable for dynamo driving, and will be found very useful for small electric-light installations in private houses.
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- - National Gas Engines.
  - BRITISH MADE.
  - Characteristic Features :
  - Simplicity. Durability.
  - Efficiency. Reliability.
  - Adopt NATIONAL Gas Engines for COAL CONSERVATION and Economical Working.
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- - Special Features of Standard Engines, 2 H.P. to 7 H.P.
  - All our small engines have the following very important advantages
  - 1. Governors.—All engines from 2 H.P. upwards are fitted with centrifugal ball governor similar in design to the larger engines. The governing arrangements on all engines are therefore of a very perfect character and ensure steady running with economical gas consumption in proportion to the duty.
  - 2. Ignition Arrangements.—We provide a special type of burner block with indestructible ignition tube which does not burn away. In the event of a tube requiring to be replaced at any time, however, a new tube can be fitted in a few minutes, and needless to say its cost is very small,
  - 3. Loose Cylinder-Liner,—All our engines have loose cylinder-liners of special, hard cast iron, These liners can be renewed or. rebored at any time at small cost.
  - 4. Valves.—Separate gas, air, and exhaust valves are fitted, all with loose covers, making them easily accessible for cleaning purposes.
  - 5. Forged-Steel Crank Shafts, machined bright all over and of exceptional strength, are fitted to all engines.
  - 6. The Starting Arrangements are simple and free from danger.
  - 7. Perfect Self-Lubrication, silent air suction, quiet working and high finish throughout will be found with every engine.
  - The 4J and 7 H.P. engines are fitted with two fly-wheels.
  - Any of these small engines can be fitted with high-tension magneto-electric ignition at an extra price, but, unless otherwise specified, tube ignition is supplied.
  - All engines are adjusted to work on town gas, and standard parts are always kept in stock.
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- - 12
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- - Particulars of Standard Engines
  - 2 TO 71 HORSE POWER.
  - STANDARD NORMAL ENGINES.
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  - Nation 64; 7-.V 2* ; Nationality 8 9 2i Native
  - STANDARD ELECTRIC ENGINES.
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  - Aoprox.
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  - Eleetrum
  - Electric
  - Eleetpieal
  - Elocution
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  - Engines “ H,” “ J,” and “ HE” are fitted with one fly-wheel. . ^
  - “ JE,” “ KE,” and ” E ” type engines are fitted with two fly-wheels.
  - The “ EE ” type engine is fitted with one fly-wheel and outer bearing.
  - Pulleys are included with normal engines but not with the electric types.
  - Engines “ H ” type upwards have ball governors.
  - Tube ignition is supplied with all the above types unless otherwise specified, ignition can be fitted at an extra charge.
  - The lubricating arrangements of all engines are such as to secure good oiling with the minimum attention.
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  - Alternatively, high-tension magneto -electric
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- - TYPE OF NATIONAL GAS ENGINES
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- - Standard Single-Cylinder Horizontal Engines
  - 10 TO 70 EFFECTIVE H.P.
  - These engines embody all the merits of the National engines we have sold since the firm came into existence, as it has always been our policy to keep in the very front rank with onr productions. We have sought to embody in them all the best points of other makers, together with the special features covered by our own patents. With this object in view we have made exhaustive investigations of British and Continental practice, and subsequently have re-designed all our models so as to give our clients the full benefit of the very latest improvements.
  - With this explanation we confidently invite a study of the engines' de6%bed. in the following pages, and we specially draw attention to the following new features of the standard designs of National gas engines from io Effective H.P. upwards :—
  - Girder Bed and supported Cylinder.
  - Ring Lubrication to Crank Shaft Bearings.
  - Positive Pump Lubrication to Cylinder and Crank Pin, 20 Horse-Power upwards.
  - Balanced Cranks on all Engines.
  - Improved Electric Ignition with Variable Timing Gear.
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- - TYPE OF NATIONAL GAS ENGINES
  - Standard Industrial design. 18 Effective H.P.
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- - Specification of Standard Singic-Cylindcr Gas Engines
  - 10 HORSE-POWER TO 70 HORSE-POWER INCLUSIVE,
  - General Description.—The engines of the types here described have massive girder beds with a continuous arm in the line of direct stress, thus ensuring maximum strength and rigidity. The bed extends well to the rear of the engine, so as to reduce the overhang of the cylinder to a minimum,, thus still further adding to general rigidity. The main bearings are fitted with fiat caps, and generally the design secures easy accessibility to all bearings and working parts. The general provisions are such that the effects of wear, the amount of oil consumed, ease of cleaning, and all other important features in the working of a gas engine are on the most efficient lines.
  - Cylinder.—The cylinder is a short and extremely simple casting, and contains the exhaust valve only.
  - It is fitted with a separate liner of specially hard cast iron, which can be easily replaced or rebored. The cylinder and liner are built into the frame of the engine so as to secure a sound and rigid job, and a suitable expansion joint is provided at the front of the liner, which is thus free to expand under the working heat. The cylinder jacket is provided with a hand-hole, having a removable door for cleaning purposes.
  - Standard Cylinder Casting.
  - (Its simplicity should be carefully noted).
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- - WELLINGTON WORKS, ASHTON-UNDER-LYNE
  - Core-making Department in Foundry.
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- - Bed.—The bed is of a specially strong girder form, and carries the two main bearings, which are fitted with adjustable steps of anti-friction metal, and are lubricated with automatic ring oilers. The latter dip into an oil-well below the bearing and rotate with the shaft, thus bringing up a lavish supply of oil, which lubricates the bearing and is afterwards returned to the oil-well. The same oil is therefore used over and over again until it has lost its lubricating properties.
  - Air and Gas Valves.—The main inlet valve and the gas valve are contained in a separate casting which is bolted to the cylinder. This system of building up in parts ensures sound castings and facilitates inexpensive renewals, should these be necessary, at any time within the life • of the engine.
  - Special attention has been paid to the ease with which the inlet, exhaust, and gas valves can be withdrawn for cleaning purposes. All that is necessary is to remove the blank covers immediately over these valves, as shewn in the figure, after which they can be withdrawn by hand without disturbing any of the valve gear. This arrangement gives unequalled simplicity.
  - Arrangements of air, gas, and exhaust valves. Shewing their accessibility.
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- - WELLINGTON WORKS, ASHTON-UNDER-LYNE
  - A Testing Bay -where all Engines are thoroughly tested before dispatch.
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- - Valves and Valve Gear.—The admission and exhaust valves are arranged in the manner already described. The valves are actuated from the side motion shaft by cams having large wearing surfaces. The cams are specialty shaped so as to work the valves quietly, and the valve gear generalty is of an extremely simple construction and of massive strength.
  - Crank Shaft.—The crank shaft is of Siemens-Martin steel, forged solid throughout, the web being cut out and the whole shaft machined and polished all over. The crank webs are fitted with balance weights to secure steady running, and oil splasher guards are fitted over the crank webs. Special attention has been paid to the proportions of our crank shafts, which are of massive strength relative to the working stresses.
  - Gear Wheels and Side Shaft.—The side shaft is driven by silent-running worm wheels. The latter are protected with a suitable wheel-guard'.- The side shaft is of ample strength, machined all over and carried in long bearings.
  - Crank-Pin Lubricator.—A special lubricator is supplied for oiling the crank pin continuously whilst the engine is working. It consists of a steel wiper which collects the oil discharged from the lubricating pump and automatically feeds it into the centre of the crank-pin bearing.
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- - type of national gas engines
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- - Connecting Rod.
  - The connecting rods are all machined from mild-steel forgings. The bearings at both ends are adjustable and are held together by massive treble best wrought-iron bolts with double nuts and fine threads. As will be seen from the illustration, the massive bearing at the crank end is of gun-metal throughout, machined and polished all over.
  - Electric Ignition.—The engines can be fitted with electric ignition at extra cost. The magnetos are of the best low-tension type, with planished - steel cover to prevent ingress of oil or grit. As will be seen from the illustration, the gear which operates the magneto directly actuates the mechanical “ make and break ” of the sparking plug without intervening links. As a consequence the sparking plug can be withdrawn without disturbing any gear, which is an important advantage. The motions for working the ignition are obtained by our patent variable timing gear, which allows
  - Standard Connecting Rod.
  - Standard Low-Tension Electric Ignition Gear. Witt variable timing arrangement.
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- - of a large variation in the timing of the ignition whilst the -engine is working.
  - Tube Ignition—When town gas only is used, onr patent tube ignition is perfectly : satisfactory. The tube itself is of suitable material, heated equally all over its surface. It is externally heated by a Bunsen flame, and is maintained at the proper temperature on an exceedingly low consumption of gas. The igniter valve works quietly, and accurately controls the timing of the ignition. Tubes sent with these patent burners will last for years if the working instructions are properly followed, but in any case the renewal of a tube is a simple and inexpensive matter.
  - Governing Gear—Ball governors driven from the side shaft by worm wheels are fitted throughout. The number of impulses is graduated to suit the load on the “ hit and miss ” system, which is recommended for all engines up to 50 H.P. Throttle governing can be applied by arrangement if desired, in which case our patent variable admission valve gear is used.
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  - Special Patent Throttle Governing Gear.
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- - Piston
  - The pistons are made of a high grade of cast-iron, and are specially long to give a good bearing •surface on the liner, thus reducing wear to a minimum. Suitable rings, also of special cast iron, are fitted to the back of the piston. The piston is positively lubricated by the automatic force pump described below, and the same supply of oil is likewise arranged to effectively lubricate the piston pin.
  - Standard Piston
  - We guarantee our pistons against cracking or distorting, in fair wear and tear, and we likewise guarantee that they will not overheat so as to cause pre-ignition or other heat troubles.
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- - Lubricating Pump for Connecting Rod and Cylinder.—We supply an improved two-throw oil pump, driven from the side shaft, for the purpose of lubricating the cylinder, piston pin, and crank pin. Glass sight feeds are fitted to the discharge of each pump, so that the amount of oil passing to each point is under easy observation. -Each oil discharge can be individually regulated to give the proper supply of oil. It is also arranged that a heavier oil can be used for the crank pin than for the cylinder. The pump automatically stops and starts with the engine.
  - Double Force Pumps with Sight Feeds for positive lubrication of Cylinder and Connecting Rod,
  - For all Engines of 25 H.F. and Upwards.
  - Air and Exhaust Silencers.—One of our patent air silencers is supplied with each engine, thus reducing the noise of the air suction to a minimum, besides filtering the air drawn in. The filter can be easily removed for cleaning purposes from time to time. A suitable exhaust silencer is also provided.
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- - Starting Arrangements.
  - All our engines from 44 H.P. -upwards can be effectively started by our patent self-starter as shewn’in the accompanying illustration. This starter consists of a small hand-pump by which an initial charge of gas and air can be pumped into the working cylinder and subsequently ignited by the .electric or tube ignition. The impulse obtained sets the engine going, and this initial motion is sufficient to carry the piston on until it draws in its working charge in the usual way. Thereafter successive impulses take place automatically until the proper speed has been reached.
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  - Patent Hand-Pu.nrp Self Starter.
  - It is sometimes preferable to pump petrol vapour into the cylinder lor starting purposes, as it gives a more powerful impulse. For this purpose a small petrol cup is attached to the starting pump as shewn in the illustration. Starting arrangements are charged extra according to the type chosen.
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- - WELLINGTON WORKS, ASHTON-UNDER-LYNE
  - One of our Machine Shops where National Engines are manufactured on the most modern methods.
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- - Whilst the hand-pump starter we have just described is recommended for its s’mplicity and effectiveness, clients sometimes, for special reasons, desire to have compressed air available for starting purposes. The arrangement of a small belt-driven compressor and steel receiver, shown on the illustration, will be found to meet the case. The compressor is fitted with a fast and loose pulley, so that it can be stopped and started at will, and the method is to charge up the receiver to a pressure of ioo lbs. per square inch, whilst the engine is at work. The valves on the receiver are then shut, and the pressure is maintained until it is required for starting purposes. A small whistle can be fitted to this receiver to sound the meal hour in unless specially ordered.
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  - Air Compressor and Receiver. For starting purposes.
  - a factory. Compressed-air starting is not supplied
  - Tests—All engines are carefully tested up to their full power and overload before leaving the works. Indicator diagrams are taken during this test, and are duly registered for future reference.
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- - TYPE OF NATIONAL GAS ENGINES
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- - TYPE OF NATIONAL GAS ENGINES
  - Standard Design of 20 Effective H.P. Electric Light Engine.
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- - Specification of 95 Horse-Power Gas Engine
  - The detail specification given in the previous pages applies generally to the 95 H.P. size and upwards although these larger sizes have a few modifications suited to the increased sizes as compared with engines from 10 to 70 H.P.
  - The modifications to which we refer are as follows :—-
  - Air and Gas Valve and Cylinder Jacket,—The air and gas valves are contained in a separate water-cooled casting which on removal exposes the whole of the inside of the cylinder jacket, which is thus made easily accessible for cleaning purposes. This is a most important feature in larger engines, as in the majority of cases the water supply contains many impurities either in suspension or solution : these deposit in the cylinder jacket, which becomes silted up, thus rendering the water-cooling onfy partially effective. A hand-hole with removable cover is likewise provided in the cylinder casing for inspection purposes.
  - Valve-Spindle Guides.—The spindle guides of all main valves, namely, gas, inlet and exhaust valves, are made separate from the main castings, so as to be easity renewable. As the spindles or guides become worn. in the course of years, they can be renewed at small cost without having to replace an expensive casting, as is the case with engines by other makers. The importance of this feature is that leakage of objectionable fumes is entirely preventable in the case of National engines throughout the whole of their life.
  - Side-Shaft Bearings.—The side-shaft bearings are fitted with automatic ring oilers which insure effective lubrication on a minimum oil consumption.
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- - TYPE OF NATIONAL GAS ENGINES
  - Standard Design of 95 Effective H.P. Electric Light Engine.
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- - Governing Gear.—In engines from “ XA ” and upwards we apply our patent variable-admission governing gear, which graduates the impulses to suit the load. As will be seen from the illustration on page 24, the governing valve is positively actuated by cam gear on the side shaft through two levers. The cam motion is transmitted from one lever to the other through a sliding plate, the position of which is fixed by the governor. As the speed rises this plate obviously rises also, and the effect is to produce a diminished opening of the gas and air regulating valve. Similarly as the speed falls the sliding plate falls also, and the opening of the regulating valve is increased. Excepting when the regulating valve is actually being opened, there is no resistance to the movement of the sliding plate up or down, and consequently it is possible to utilise a light and sensitive governor. The parts of this gear liable to wear are few, and the gas valve can be withdrawn for cleaning purposes without disturbing any of the governor gear at all.
  - The simplicity and effectiveness of the foregoing arrangements are striking features of the patent.
  - Typical indicator diagrams obtained through the use of the variable-admission governing gear just described are given on the opposite page.
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- - Full Load.
  - Light Load
  - Variable Load.
  - INDICATOR PENCIL AGAINST STOP
  - EXHAUST
  - ATMOSPHERIC
  - LINE
  - ------AUCTION
  - Light Spring Card.
  - TYPICAL INDICATOR DIAGRAMS
  - Obtained with our Patent Variable-Admission Governing Gear,
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- - WELLINGTON WORKS,] ASHTON-UNDER-LYNE
  - Drawing Office.
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- - WELLINGTON WORKS, ASHTON-UNDER-LYNE
  - Brass-Finishing Department.
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- p.37 - vue 39/50
- - WELLINGTON WORKS, ASHTON-UNDER-LYNE
  - Heavy Turning Shop where Fly-Wheels and other heavy parts are machined by powerful Turning Mills.
  - 38
- p.38 - vue 40/50
- - WELLINGTON WORKS, ASHTON-UNDER-LYNE
  - Part of Foundry and Moulding Shop where all Castings for National Engines are produced.
  - 39
- p.39 - vue 41/50
- - All the engines listed on opposite page have girder beds, supported cylinders, and generally embody our very latest improvements.
  - Balance weights are fitted to all crank shafts, and wrought-iron splasher guards are likewise provided.
  - Standard wrought-iron pulleys as per list are included, but special pulleys are charged extra.
  - The powers given are maximum at the standard speeds, and due allowance should be made between this maximum and the constant working load which the engine has ordinarily to meet, so as to ensure a suitable reserve of power.
  - So far as power developed and good general working are concerned, it is assumed that the local conditions are not unusual. The gas supplied to the engine should in all cases be plentiful and good. There should also be a plentiful supply of water for the cylinder jacket.
  - In cases where slower running engines are preferred, all those listed above are equally suitable when running at reduced speeds. In the latter case, the power developed will be reduced in proportion to the drop in speed.
  - Where gas engines work at a considerable elevation above sea level, their power is reduced about 5 per cent, for every 1,000 feet.
  - Our standard normal engines listed on p. 41 will drive lineshafting with a suitable degree of steadiness for most industrial purposes, but we do not guarantee that these engines will necessarily give a sufficiently steady drive for electric work. For the latter we advise our special electric type engines.
  - Normal Engines with Two Fly-wheels,
  - 40
- p.40 - vue 42/50
- - Standard Normal Engines, fitted with Two Fly-wheels
  - (SEE FIGURES 1 AND 2)
  - G O P . w s 50 U <D PRINCIPAL OVERALL DIMENSIONS Approx. Weights
  - 111 Q, sed in Revs, p minute. Belt Pulley Flywheel' Engine only Concrete Foundations ® a O ^ +3 ! Ul Q.
  - > h 1? 1- Dia. :Widtb i Dia. £ Length Width ! Length j Depth Width ’5b a >5 H a p 0 J|j«f u S a ^ C3 ft!o t Cu 3 ! Code Word > h
  - c3 s B.H.P. a m A B C D E F < H J j K P G+ H J + K L M N 6^ P P
  - In In. Ft. In. In. Ft. In In. Ft. In In. Ft. . InJ Ft. In. Ft. In. Ft. In. Ft In. Ft. In. ! Ft. In. Ft. In. Cwt. Cwt. Cwt.
  - M 10 280 18 6 1 H 12 3 6| 4| ' 4 11 i 12 j j 1 11 2 14 1 6 5 11 4 Oi 6 6 2 9 i 2 6 15 18 : 44 Natural M
  - O 14 260 24 10 1 5f 134 3 10 Si 5 8 14 j 2 44 2 6 1 8 6 10 4 104 7 9 3 44 3 0 19 23 : 5i Naturalize O
  - P 18 250 24 10 1 64 14 4 4| 5 6 2 15 2 54 2 6 1 9 7 5 4 114 8 3 3 4A 3 6 30 35 64 Naturally P
  - R 26 250 30 12 1 9g 15 4 54 6 ; 6 10 16 i 2 11 3 2 , 2 1 8 2 6 1 9 0 3 104 j 4 0 40 47 7 fi- Nature R
  - S 34 250 30 12 1 104 16 5 If n 7 1 17 2 11 3 2 2 CO GO 6 1 9 3 3 R'4 ; 4 0 45 52 ll Naval S
  - T 44 240 40 12 2 3 17 5 34 n 7 9 184 j 3 5 3 8 2 64! 9 34 7 1 10 3 4 6 4 6 60 69 144 Navigate T
  - V 50 230 40 14 2 3 18 5 8§ n a 2 194 i 3 64 3 10 2 04 9 94 7 44 11 0 4 6 4 6 72 82 154 Navigation V
  - W 60 230 54 14 2 4 18 5 11 ~2 , 8 74 194 3 7 i 3 104 2 7 10 3 7 54 11 0 5 0 5 0 90 102 21 Navigator W
  - X 75 230 54 16 2 54 19 5 11 : -7fj GO O tCH 21 3 104 4 24 2 94:10 74 8 1 11 6 5 0 5 0 100 114 21 Navigable X
  - XA 95 210 60 20 3 1 164 6 44* 10!j |j 9 i : i' i 54 24 4 94 5 24 3 54'11 54 10 0 13 0 5 6 .6 0 145 160 334 Navy XA
  - 41
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- p.41 - vue 43/50
- - All the engines listed on opposite page have girder beds, supported cylinders, and generally embody our very latest improvements.
  - Balance weights are fitted to all crank shafts, and wrought-iron splasher guards are likewise provided.
  - Standard wrought-iron pulleys as per list are included, but special pulleys are charged extra.
  - The powers given are maximum at the standard speeds, and due allowance should be made between this maximum and the constant working load which the engine has ordinarily to meet so as to ensure a suitable reserve of power.
  - So far as power developed and good general working are concerned, it is assumed that the local conditions are not unusual. The gas supplied to the engine should in all cases be plentiful and good. There should also be a plentiful supply of water for the cylinder jacket.
  - In cases where slower running engines are preferred, all those listed above are equally suitable when running at reduced speeds. In the latter case the power developed will be reduced in proportion to the drop in speed.
  - Where gas engines work at a considerable elevation above sea level, their power is reduced about 5 per cent, for every 1,000 feet.
  - Our standard normal engines listed on p. 42 will drive line shafting with a suitable degree of steadiness for most industrial purposes, but we do not guarantee that these engines will necessarily give a sufficiently steady drive for electric work. For the latter we advise our special electric type engine.
  - G---
  - Normal Engines with One Fly-Wheel.
- p.42 - vue 44/50
- - Standard Normal Engines fitted with One Fly-wheel
  - (SEE FIGURES 3 and 4)
  - Ph' . PRINCIPAL OVERALL DIMENSIONS. : Approx. Weights
  - ui iximum B H. n Town’s Gas o A & „ q Belt Pulley Fly i Wheel ; Engine only ; Concrete Foundation © i ri packed Shipment ! ui
  - > h <n ?-< $ ® 0, Oh CC Dia. j Width A i Dia. 2 : > Length j Width Length I j Depth , Width be ^ G 5 ° © I O ! ^ : Code Word > H
  - S3 ° B.H.P. A B C D E F G H J K j | G+ HJ + K L M N d u Cq
  - In. In. Ft. In. in. Ft. In.1 In. Ft. In. In. Ft. In. In. Ft. In. Ft. In. Ft. In. Ft. In. Ft. In. Cwt Cwt Cwt.
  - M 10 280 18 6 1 9 12 4 5 1 5 4 11 12 2 9 13 5 11 3 10 6 6 2 9 4 3 15 18 6 Cockle M
  - O 14 260 24 10 1 11 13 5 5 i 2 7i 5 8 14 3 ^2 15 6 10 4 84 7 9 3 44: 5 3 22 27 11 Codex O
  - P 18 250 24 10 2 0 14 5 2 . 7i 6 2 15 j 3 7 15 7 5 4 10 8 3 3 44 5 44 33 38 11 Cogent P
  - R 26 250 30 12 2 4i 15 5 8i 7| 6 10 16 i 4 2 18 8 2 5 8 9 0 3 104; 6 3 42 48 16 Colation R
  - S 34 250 30 12 2 5i 16 5 8i 7f 7 1 17 : 4 3 18 8 6 5 9 9 3 3 104 6 6 48 55 16 Collarage S
  - T 44 240 40 12 2 8 17 5 ii n 7 9 184 4 H 204 9 34 6 3 10 3 4 6 ; 7 0 60 69 21 Cottage T
  - V 50 230 40 14 2 8i 18 6 2 10 8 2 194 4 10 204 9 94 6 64 11 0 4 6 7 3 72 82 254 Covenant V
  - W 60 ! 230 54 14 2 84 18 6 41 10 8 74 194; 4 10 21 10 3 6 7 11 0 5 0 7 6 90 102 ! 344 Cowslip W
  - X 75 230 54 16 3 2i 19 6 7 10 8 10| 21 j 5 74 234 10 74 7 7 11 6 5 0 ; 8 0 100 114 ! 404 Coxswain X
  - XA 95 210 60 20 3 8 16i 7 6i 12 9 54 24 i 6 6 29 11 54 8 11 13 0 5 6 9 6 150 165 ' 44 Cozens XA
  - 43
- p.43 - vue 45/50
- - 4A —
  - 4-- H —
  - Figures of Alternative Standard Arrangements of Electric Type Engines,
  - 44
- p.44 - vue 46/50
- - Particulars of Engines for Electric Driving
  - and for Factory Driving, where Steady Turning is specially required. (see figures 5, 6 and 7.)
  - PRINCIPAL OVERALL DIMENSIONS.
  - Approx.
  - Weights.
  - III CL > |_ PQ 03 S g 1 S£ i 02 2 i w a C 'H Belt Pulley. Fly Wheel. 1 Engine j Only. j Concrete Foundation. <D a 'So . c >> 111 r3 rQ Code Word ui d. >
  - J§ m Dia. A Width ! B C D Dia width E F i G H 1 J K ‘ R j Length 1 Width G+ Hi J + K Length 1 L i Depth m : Width N w-a ^ ° 4) fl £ h j 1
  - B.H.P. j 1 I 1 £
  - In. In. Ft. In. In. Ft. In.j In Ft. In. In. Ft. In. In. ! Ft. In. Ft. In. Ft In. Ft In. Ft. In. Ft. : In. Cwts Cwts Cwts.
  - ME 10 j 280 ' 18 6 1 9 12 5 3* 7i 4 11 12 2 9 13 | 2 3f 5 11 3 10 6 6 2 9 4 3 15 18 14 Elongate ME
  - OE 14 260 24 10 1 11 13* 5 11 n 5 8 i 14 3 6* 15 i 2 9* 6 10 4 8* 7 9 3 4* 5 3 22 27 21 Elucidate OE !
  - PE 18 250 i 24 10 2 0 14 6 2 10 6 2 15 3 7 • 15 ; 2 10| 7 5 4 10 8 3 3 4* 5 4* 34 39 25* Elegance PE
  - RE 26 250 : 30 ! 12 2 15 6 4* 10 6 10 16 4 1* 18 3 S§ ; s 2 5 7* 9 0 3 10* 6 3 40 47 33 Elegantly RE
  - SE 34 250 30 12 2 Si 16 G 6f 10 7 1 i 17 4 3 18 1 3 5* 8 6 5 9 9 3 3 10* 6 6 48 55 40 Element SE
  - TE 44 240 40 12 1 2 8 17 7 6.1 12 j 7 9 ! 18* 4 6* : 20*; 3 9§ . 9 3* 6 3 10 3 4 6 7 0 60 69 44 Elevate TE
  - VE 50 230 40 ! 14 i 2 8* 18 7 8 I 12 ! 8 2 ; 19*1 4 10 20*' 3 11* 9 9* 6 6* i11 0 4 6 1 t \ 3 72 82 50 Elevator I VE 1
  - WE I 60 230 1 54 1 14 2 8* 18 7 10 12 8 7*; 19* i 4 10 ! 21 ! 3 11*10 O 6 7 I11 0 5 0 7 6 90 102 I 58 Elevation WE
  - XE 75 230 1 54 16 S 3 21 19 8 1*| 14J 8 10* 21 5 7* m 23* ; 4 81 10 7* 7 7 in 6 5 0 1 8 0 105 118 83 Eligible ! XE
  - XAE 95 210 60 20 ; 3 8 16* 8 4| 18f 9 5* 24 j 6 6 29 ! 5 2 11 5* i 8 11 13 0 5 6 | 9 6 145 160 111 Elicit XAE 1
  - All the foregoing engines have girder beds, supported cylinders, and generally they embody our very latest improvements.
  - They are fitted with extra heavy fly-wheels, giving a degree of regularity of rotation which makes the engines quite suitable for the steady driving of dynamos. They will drive direct-current dynamos in parallel without any difficulty whatever.
  - Balance weights are fitted to all crank shafts, and wrought-iron splasher guards are likewise provided.
  - No pulleys are included with electric engines.
  - The powers given are maximum at the standard speeds, and due allowance should be made between this maximum and the constant working load which the engine has ordinarily to meet so as to ensure a suitable reserve of power.
  - So far as power developed and good general working are concerned, it is assumed that the local conditions are not unusual. The gas supplied to the engine should in all cases be plentiful and good. 1 There should also be a plentiful supply of water for the cylinder jacket.
  - Where gas engines work at a considerable elevation above sea level, their power is reduced about 5% for every 1,000 feet.
  - 45
- p.45 - vue 47/50
- - Thousands of National Engines are in use in:—
  - Mills and Factories,
  - Shipyards,
  - Bridge Works,
  - Tin and Copper Mines,
  - Coal Mines,
  - Weaving Sheds,
  - &c., &c., &c.
  - Saw Mills, Flour Mills, Laundries,
  - Cold Stores, Cement Works, Sewage Works,
  - In Electrical Work they are extensively used for:—
  - Electro-chemical processes,
  - Driving Dynamos for Power,
  - Lighting of Mansions and Public Buildings, Theatre Lighting, &c., &c., &c.
  - We can give numerous references in all the above classes of work, and consequently we have a wide experience in successfully applying gas power in all cases. Intending clients may, therefore, have every confidence in the success of installations proposed by us.
  - The National Gas Engine Co., Ltd., are Contractors to the War Office, Colonial Office, Foreign Governments, and the Leading Gas Companies at home and abroad.
  - 46
- p.46 - vue 48/50
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- p.47 - vue 49/50
- p.48 - vue 50/50