Chapter XXXV: Section 42: Hydraulic Multiplying Gear

=747. Is the ordinary “chain and sheave” multiplying gear,= unequally geared, thus--

Ram end. Cylinder end.
With 1 sheave 1 sheave it is geared 3 to 1.
„ 2 „ 2 „ „ 5 to 1.
„ 3 „ 3 „ „ 7 to 1; &c.

=748. Is the same plan,= but equally geared--

Ram end. Cylinder end.
With 1 sheave No sheaves it is geared 2 to 1.
„ 2 „ 1 sheave „ 4 to 1.
„ 3 „ 2 „ „ 6 to 1; &c.

=749. An arrangement of the sheaves= suitable for vertical working, geared 8 to 1.

=750. An arrangement of the sheaves= suitable for vertical working, but geared 6 to 1.

=751. An arrangement of the sheaves= suitable for vertical working, but geared 4 to 1.

=752. Stevens and Major’s patent= for horizontal working. The angle of the chain helps to support the weight of the ram.

=753. Modification of 752,= sometimes used, and suitable for both horizontal and vertical positions, with any required multiplication of speed.

=754. Rack gear;= short stroke piston cylinder plan.

=755. Double rope vertical ram gear.=

=756. Arrangement with the sheaves= all at head of cylinder.

For Telescopic Hydraulic Lift, see Nos. 1217 & 616.

Hydraulic Balance gear, Nos. 371, 373.