The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

[1953]. Fine screw adjustment for any movable part.

[1954]. Fine screw adjustment for a radial arm.

[1955]. Division plate, with differential dividing on its opposite faces.

Belts, bands, &c., are adjusted by corresponding series of holes and laces, screws or rivets to fit them.

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Section 3.—BELT GEARING.

(See also [p. 12].)

[1956]. Fast and loose pulleys; the fast pulley is larger in diameter than the loose pulley, to allow the belt to run slack when running idle.

[1957]. Round rubber belt gear.

[1958]. Device for tightening a belt; two guide pulleys are run on studs fixed to a locking lever, the pull of the belt rocks this lever as far as the slack of belt will allow, thus keeping the belt tight.