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 The parts of this gear liable to wear are few, and the gas valve can be withdrawn for cleaning purposes without disturbing any of the governor gear at all.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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