Contactless press control device

Details Contactless press control device Contactless press control device

1982-09-29

1986-03-04

Smith, Jerry

Boots, shoes, and leggings

364185, 371 25, 371 27, 324173, G05B 902, G01R 3128, G01P 348

Patent

active

045743436

ABSTRACT:
A contactless control device for a press having a device for checking whether an abnormality detector normally operates or not. The device of this invention is constructed to operate when power is fed to the press or when the press is stopped at its top dead center. A self-check operation generates and applies a dummy pulse to the abnormality detector. The abnormality detector generates an error signal corresponding to the dummy signal if normal. Since no error signal is generated when the abnormality detector is abnormal, the press is not operated. Operation of the press is dependent on the error signal. Whether the abnormality detector is normal or not is indicated during a self-check operation.

REFERENCES:
patent: 3680069 (1972-07-01), Neumann et al.
patent: 4107649 (1978-08-01), Kurihara
patent: 4205301 (1980-05-01), Hisazawa
patent: 4363124 (1982-12-01), Aichelmann, Jr.

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