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

[1433]. Belt screw.

[1434]. Gib cotter bolts.

See also pipe couplings, [Nos. 1071, 1072, 1073], [1074, 1075], and [1062], [1068], [1070].

For spiral worms and creepers, see [Section 57].

Spiral pump, [No. 1022].

Note that it is possible to construct a screw with an increasing or decreasing pitch, as is done with the screw propeller. See also [No. 1378].

Double screw gear, [No. 727].

Snail worm gear, [No. 730].

Worm and crown gear, [No. 733].

Worm and spiral gear, see [Section 84].