Section 51.—LUBRICATORS.
I do not propose to attempt to illustrate the vast tribe of “greasers” of all kinds. They would easily fill a moderate volume, but scarcely repay the reader for perusal. I shall content myself here as elsewhere by indicating the types of most interest and importance to the machine draughtsman.
Besides the simple cup or enlarged oil hole, oil box, and grease cup, the following are the most commonly employed:—
[971]. Oil pan for gearing, worms, wheels, &c.
[972]. Revolving wire lubricator; carries a drop of oil on to the shaft at each revolution.
[973]. Roller and pan lubricator. Can be employed also for gum, paste, paint, &c.
[974]. Screw ram lubricator, to force lubricant into a cylinder or pipe against pressure, with non-return valve.
[975]. Telescopic tube lubricating device, for reciprocating or revolving joints, such as crank pins.
[976]. Another tubular device for crank pins; a hollow cup on end of a tube stands opposite the centre of the shaft, and can be fed with oil while revolving, the oil running down the tube during the lower half revolution.