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

[1151]. Modification of the last named; in both the wheel is locked during the dead movement of the cam by the flange passing between the teeth.

[1152]. Slot wheel and pin gear.

[1153]. Segment-wheel intermittent feed motion; locked during the dead movement of driving wheel.

[1154]. The pawl is lifted out of gear at each revolution of the pin wheel A and the ratchet moved one or more teeth.

[1155]. Double pawls and links for continuous feed motion.

[1156]. The cam A is eccentric to the wheel B, and slips out of gear at any required point while the driving wheel makes a partial revolution.

[1157]. Spring-pawl feed motion; the large wheel with pawl attached drives the ratchet wheel.

[1158]. Rocking lever and double pawls for raising a rack.

[1159]. Internal pawls, dropping into gear by gravitation.

[1160]. The pawl is lifted out of gear by the act of putting the handle on the square end of shaft, the handle having a boss shaped so as to lift the pawl.