By Beregond, Anders Stenström
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Linkage G and H are moved up and down by means of J. Lever G is attached to a non-movable at K, while lever H is attached at L to a sliding, M. The sliding member moves backward and! i M becomes jammed or is prevented from mov~ a normal manner, pawl A will ride out of the notch Q and travel over the radial surface of this thus disconnecting the drive. -The simple feed-trip mechanism shown in Fig. 10 was fitted to a heavy shell-turning lathe on which the feed had previously been of the entirely positive type, with no safety device to take care of overloading or jamming.
1, II' i " d aj i I Unwinding Thin Tissue from RolF G which Stops if Material Exceeds the Rate at which the Material is Used. u 102 OVERLOAD, TRIPPING AND STOP MECHANISMS action of spring T. Driving sprocket U is fastened to shaft Q. Yoke V of the clutch-actuating mechanism is equipped with pins which fit into a groove in clutch member R. The yoke is supported by a bracket fastened to side frame A. Tripping bar W is pivoted on shaft X, which is supported in bearings provided in side frames A.
Fig. 5 shows the cam rotated to the position where follower L has caused member H to be moved forward toward the ratchet. The result is shown in Fig. 6, where it will be seen that the pawl has been raised, to pl·event it from coming in contact with the next tooth, thus interrupting the ratchet movement. The cam M can be arranged to provide any form of interrupted ratchet motion desired. It can be arranged to rotate continuously or intermittently, depending, upon the nature of the application. The cam action is so timed that member H is moved forward into position to prevent the pawl from engaging the ratchet wheel at the moment the pawl is in the position shown in Fig.
Arda Philology 3 by Beregond, Anders Stenström