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

e. Rack and pinion gear. See [No. 754].

f. Worm and wheel gear. See [Section 84].

Note as to brake wheels: these should always be upon the load shaft so that the braking is not transmitted to the load through toothed gearing. Worm gear usually will not sustain a load without a brake wheel, unless there is an excess of friction which should not exist.

g.

Friction gear. See [Section 38].

g. Friction gear. See [Section 38].

(2.) BY POWER.

This may be applied to any of the above as follows:—

a or b. To the ordinary winch by either gearing (see [Section 84]), belts (see [Section 3]), or friction gear (see [Section 38]).

b.