F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/224
F16H 9/18 (2006.01)
Patent
CA 1076844
ABSTRACT OF THE DISCLOSURE This invention relates to a novel power drive assembly for use with a prime mover. The assembly comprises a rotatably supported first shaft and a rotatably supported second shaft spaced from the first shaft and parallel thereto. A pair of pulleys are provided and the lateral movement of the second half portion of the driving pulley relative to the first half portion is fixed by a manual control acting together with a feedback loop. This loop comprises a load sensor which senses the load on the prime mover and an automatic voltage level setting circuit. This circuit is coupled between the manual control and the power means that move the second half portion of the driving pulley. The output of the load sensor is coupled to an input of the voltage limiting circuit such that the maximum level of the voltage applied to the power means is fixed by the load sensor. If the load on the prime mover exceeds the set level, the voltage limiting circuit will reduce the voltage applied to the power means in response to the output of the load sensor to reduce the effective pitch diameter ratio between the driving and driven pulleys thereby preventing the load on the prime mover from exceeding the predetermined maximum load set by the load sensor. This device has overcome the problem of radial imbalance of the prior art and provides a greater improved and efficient assembly.
328150
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