192 clutches and power-stop control – Stop mechanism – Safety device
Patent
1975-04-17
1976-10-26
Scott, Samuel
192 clutches and power-stop control
Stop mechanism
Safety device
192130, 74612, 100 53, F16D 700
Patent
active
039878813
ABSTRACT:
A safety guard for a machine tool, such as a punch press, having an operating part, such as a ram, having a control member. The guard comprises gates between the operating part and a machine tool operator. One of the gates is slidable across the front of the machine tool. Another of the gates is disposed at the side of the machine tool and has a pivot on which it is swingable. The sliding gate carries a control actuator and closes on a path which intersects the free end of the swinging gate which has a bumper. The sliding gate is powered by an air cylinder having a control accessible to the operator. When either gate is open, the machine tool control member is deactuated and there is no danger that the machine tool will operate to endanger the operator's hands. The machine tool operator actuates the gate control to close the sliding gate. If there is any obstruction in the path of the gate, such as the operator's hand, the gate will not close, or the gate will push the operator's hand against the bumper on the swinging gate so that swinging gate is opened by this pressure. In either event, the machine tool control member is not actuated. Novel control actuators, latches and control disabling means are provided for the purpose of controlling gate movement and control actuation to insure maximum safety for the operator, to prevent repeated control operation under certain circumstances and to disable the control actuating mechanism when the swinging gate opens.
REFERENCES:
patent: 1575843 (1926-03-01), Jones
patent: 2724287 (1955-11-01), Knotz
patent: 3641841 (1972-02-01), Komori
patent: 3815440 (1974-06-01), Mikvlin
patent: 3848721 (1974-11-01), Smit
Heald Randall
House, Jr. Joseph P.
Perkins & Mundt Inc.
Scott Samuel
LandOfFree
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