Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1988-07-28
1989-10-10
Smith, Gary L.
Machine element or mechanism
Control lever and linkage systems
Elements
74535, G05G 506
Patent
active
048723681
ABSTRACT:
A cable operating apparatus includes a pawl and ratchet arrangement for maintaining an operating lever in a cable-tensioning position. The pawl is bifurcated to define a pair of pawl tips, the pawl being pivotable in opposite directions for effecting alternate engagement of the pawl tips with the ratchet. The pawl contains a slot that receives the pawl pivot pin and which permits lateral movement of the pawl between a pair of end positions. An overcenter spring arrangement alternately pivotally biases the pawl in opposite directions when the pawl is displaced toward the end positions, respectively. A cam arrangement serves to effect lateral displacement and pivotal movement of the pawl when the operating lever is pivoted from the released position toward a cable tensioning position. When the operating lever is locked in a cable-tensioning position by the pawl and ratchet arrangement, further movement of the lever in the cable-tensioning direction causes release of the pawl from the ratchet, whereupon the operating lever may either be pivoted further in the cable-tensioning direction, or released for return to the cable-released or off position. According to a modification, a manually operable release rod may be provided for releasing the pawl from the ratchet.
REFERENCES:
patent: 2088054 (1937-07-01), Crosman
patent: 2174995 (1939-03-01), Osborne
patent: 3282125 (1966-11-01), Dully
patent: 3590656 (1971-07-01), Lloyd
patent: 3625087 (1971-12-01), Flory
patent: 3650157 (1972-03-01), Strathearn
patent: 4612823 (1986-09-01), De Leeuw
Orscheln Co.
Saether F.
Smith Gary L.
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