192 clutches and power-stop control – Stop mechanism – Safety device
Patent
1978-03-21
1980-05-13
Yost, Frank T.
192 clutches and power-stop control
Stop mechanism
Safety device
83 58, 83 61, 83554, 83617, 91356, 100 53, 192134, B26D 724
Patent
active
042024331
ABSTRACT:
An arrangement for protecting tools in a hydraulic press against overloading if a foreign object or body is present in a tool space of the hydraulic press. A displacement or travel switch monitors at least a portion of a path of movement of a press ram with a control member providing an output signal during a predetermined movement of the press ram. A control circuit evaluates a sequence of the output signals of the displacement or travel switch and the control member in such a manner that a fault signal is formed when the additional switching device provides an output signal prior to an output signal of the displacement or travel switch. The control member is arranged in a path of force of at least one component of the hydraulic press and is constructed as a signal transducer operating virtually stationarily as a function of pressure.
REFERENCES:
patent: 1600256 (1926-09-01), Stoll
patent: 3543621 (1970-12-01), Weiland
patent: 3991639 (1976-11-01), Pfeifer
patent: 4006655 (1977-02-01), Maurer
patent: 4010679 (1977-03-01), Dybel
SMG Suddeutsche Maschinenbau-Gesellschaft mbH
Yost Frank T.
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