192 clutches and power-stop control – Stop mechanism – Safety device
Patent
1977-04-13
1978-12-26
Herrmann, Allan D.
192 clutches and power-stop control
Stop mechanism
Safety device
91 43, 92 84, 92117A, 192 99S, 192131H, 192134, 403 32, F16P 310, B30B 1512
Patent
active
041311892
ABSTRACT:
To permit safe operation of clutch actuated moving ram machines, especially when the operator is to be permitted to "float" the ram, the operating linkage to the clutch is formed with a connection which requires input motion of the linkage in predetermined degree to actuate a safety mechanism. The purpose is to prevent ram operation until the operator is out of harm's way. The linkage is formed such that additional motion of the input elements to the clutch is ineffective to actuate the clutch until the safety apparatus is properly positioned whereupon such additional motion of the input member is made effective to actuate the clutch. An apparatus effective to perform according to that method comprises a piston and a cylinder capable of movement relative to one another and both capable of movement relative to a frame on which the clutch is mounted. The piston and cylinder are made movable relative to the frame in response to a predetermined initial degree of movement of an input member and that movement is made to actuate a switch which controls operation of the safety apparatus. A stop prevents further movement of one of the cylinder or piston elements while the other is free to move whereby to permit movement of the input member without output movement. The apparatus includes a means for removing the stop and forcing the piston to one end of its travel in the cylinder after the safety apparatus has been properly positioned whereby movement of the input member is transmitted to the clutch.
REFERENCES:
patent: 2101021 (1937-12-01), Daly
patent: 2733799 (1956-02-01), Williams
patent: 2784823 (1957-03-01), Ortlepp
patent: 3011610 (1961-12-01), Steibel et al.
patent: 3092229 (1963-06-01), Uher
patent: 3884336 (1975-05-01), Williamson
patent: 3999477 (1976-12-01), Good et al.
Frater Grover A.
Herrmann Allan D.
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