Machine element or mechanism – Gearing – Adjustable
Patent
1976-02-02
1979-01-09
Gerin, Leonard H.
Machine element or mechanism
Gearing
Adjustable
F16H 3306, F16H 3508
Patent
active
041332172
ABSTRACT:
Constant rotation from a motor is converted into cyclical rotation for a transfer assembly by means of a drive mechanism having a continuous chain threaded around four sprocket gears arranged in a rectangular configuration with a second set of idler gears mounted on a movable block taking up the slack in the chain on two sides of the rectangular configuration. The movable block and idler gears are moved to and fro by the action of a pivoted cam follower which is reciprocated by a cam mounted on the driving shaft of one of the sprocket gears. Constant rotational power is supplied to the mounting shaft of one of the four main sprocket gears and cyclical rotation is taken out on the mounting shaft of the second one of the four main sprocket gears which is located on the opposite side of the driving chain slack from the driving sprocket gear. In the preferred embodiment the cyclical output is used to drive a carriage transfer mechanism having a carriage mounted on a pair of slidable bars and driven by a continuous chain mounted around a pair of sprocket gears at opposite ends of the bars. The carriage is attached to the driving sprocket chain of the carriage transfer mechanism by means which produce only tension on the chain and virtually no lateral forces on the carriage transfer mechanism structure.
REFERENCES:
patent: 2106918 (1938-02-01), Perazzoli
patent: 3166947 (1965-01-01), Hendershot
patent: 3393754 (1968-07-01), Hachemeister
patent: 3906810 (1975-09-01), Glendening
Gerin Leonard H.
Levi Strauss & Co.
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