Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1981-12-04
1984-01-31
Staab, Lawrence J.
Machine element or mechanism
Gearing
Directly cooperating gears
74405, 74337, 192 30W, 192 20, 192 56R, 192150, F16H 102, F16H 5700, F16D 1100, F16D 2300
Patent
active
044282494
ABSTRACT:
In a processor of photosensitive material, a torque sensor actuates an alarm when a helical gear is subjected to torque in excess of a first predetermined value. The torque sensor includes a helical gear positioned on a shaft and biased against a stop. The gear is slidably attached to the shaft along the axis of the shaft and is fixedly attached to the shaft in an angular direction by a key. A shoulder of a flexible rubber boot movable with the gear along the shaft axis moves with the gear when the torque exceeds the first predetermined value and actuates a switch to warn the operator. In addition, as the torque increases, the gear slidably moves along the shaft past the key, thereby allowing the shaft to freely rotate in an angular direction within the gear.
REFERENCES:
patent: 2621678 (1952-12-01), Snyder et al.
patent: 2658399 (1953-11-01), Mercier
patent: 2945925 (1960-07-01), Gessell
patent: 3411612 (1968-11-01), Richmond
patent: 3563353 (1971-02-01), LoPresti
patent: 3675749 (1972-07-01), Olson
patent: 3782658 (1974-01-01), Mischenko
patent: 3935754 (1976-02-01), Comollo
patent: 4373924 (1983-02-01), Schuhmacher
"Axial Motion of Splined Worm Gear Provide Torque Limiting Cut" Design News, Apr. 14, 1958.
Bednarek Michael D.
Pako Corporation
Staab Lawrence J.
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