Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1975-05-27
1976-11-02
Scott, Samuel
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
F16H 1904
Patent
active
039889360
ABSTRACT:
A fluid-operated cylinder operates a rack which is in constant mesh with a pinion gear. The pinion gear is mounted on the power input shaft of a fluid-operated jaw clutch, having toothed driving and driven elements, and arranged to engage only when the rack is driven in one direction so that the output shaft of the clutch has intermittent rotary motion in one direction. The rack extends through a stop block and includes an axially adjustable collar which abuts the stop block at one limit of movement of the rack. At the same time, a switch actuator on the rack contacts the actuator of a switch mounted on the stop block to reverse the direction of the rack. In order to adjust the driving stroke of the piston rod in the air cylinder, and hence the driving stroke of the rack, the stop block is provided with a toothed mounting surface and can be selectively positioned along a similarly-toothed mounting plate. By establishing these teeth at a pitch equal to the stroke of the rack for one powered rotation of the clutch driven member, divided by the number of teeth in the jaw clutch, the stop block may be set at any desired position along its mounting plate and yet provide efficient meshing engagement of the toothed driving and driven members. A formula for using a standard pitch cutter to obtain the exact pitch required for the stop block and mounting plate teeth is a part of the disclosure.
REFERENCES:
patent: 2191605 (1940-02-01), Zehnder
patent: 2441854 (1948-05-01), Stolp
patent: 2636391 (1953-04-01), Carter
Catto R. B.
FMC Corporation
Ratliff, Jr. Wesley S.
Scott Samuel
Tripp C. E.
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