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

[1531]. The same result obtained by two wheels, one fixed to shaft, the other loose and forced round by a spring so as to follow the pitch of the pinion and destroy all backlash.

[1532]. Mortise wheel teeth.

[1533]. Mortise wheel teeth; another method.

Note.—Wood teeth are usually one-third thicker than the iron teeth they gear into.

[1534]. Pin wheel and pinion gear.

[1535]. Lantern wheel.

[1536]. Screw gear, used in place of bevil gear. Shafts at right angles; teeth at an angle of 45°.

[1537]. Variable speed cone gear.

[1538]. Variable speed square gear.

[1539]. Variable speed oval or elliptical gear.