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The following table gives particulars of the principal types of Morganite brushes and their spheres of use :—

Type. Normal current density, amps, per sq. cm. Sphere of use.

Morganite:

Link-one 9-5 Suitable for dynamos and motors of all voltages which are not working under specially adverse conditions.

Link-two 9-5 General properties similar to Link-one, but mechanically stronger.

Link-three - Hard-Morganite : 9-5 This type of brush is composed of strata of varying conductivity, and is suited for machines offering special commutating difficulties.

Link-one/289 155 Harder and tougher than Link-one. Specially suited to machines of low voltage and slip rings.

Link-two/24 Copper-Morganite : 125 Harder and tougher than Link-two. Recommended for use on steel slip rings.

Link-two/538 25 Very high conductivity and good lubricating qualities. This brush can replace copper gauze on D.C. machines and is suitable for slip rings where extra high current densities are employed.

Battersea Carbon Brushes.

These are made from the best materials, obtained from the maker’s own mines. A special feature is the method by which flexible leads are fixed in brushes of this description.

The brush is drilled at any desired point to the depth of about d in.. The flexible after being splayed out at the end is inserted in the hole and held firmly in position by means of a pure metallic powder compressed by a new method.

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