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

Air vessels are used to cushion the action of a pump, both on the delivery and suction.

[2121]. A spring piston is used for the same purpose.

Pads or cushions of rubber, felt, leather, &c., are used as buffers to cushion blows.

Shaw & Spiegle’s steam towing machine provides an elastic steam cushion which yields to prevent overstraining the cable, the engine then running backwards under the strain, but winds up again as the strain goes off, thus paying in and out to suit the motion of the vessel.

[Larger plate.]

Section 30.—DRILLING, BORING, &c.

(See also [p. 72].)

See Expanding reamers, [Nos. 2149], [2151].

See Expanding cutters, [Nos. 2069], [2070], [627].