Safety device for power-operated presses and the like

Details Safety device for power-operated presses and the like Safety device for power-operated presses and the like

1974-06-24

1976-02-17

Scott, James R.

Electricity: circuit makers and breakers

Special application

Feeler moves into detecting contact with object

192129A, 192134, H01H 316, F16D 900

Patent

active

039393143

ABSTRACT:
A safety device is provided for the operation of small presses, spot welding machines, etc. The device is characterized by the use of a probe or sensor whose movement, if obstructed, prevents closing of an electrical circuit which activates the punch or ram of the press. Means are provided for minimizing or eliminating bounce or vibration of the sensor to avoid erratic operation of the device and the press. Provision is also made for rendering the device "fail-safe" under certain conditions, including failure of internal parts of the device or improper usage of the device by the operator. Economies in manufacture of the device are effected by the improvement of certain parts and elimination of other parts of previously used devices of a similar nature and construction.

REFERENCES:
patent: 2400486 (1946-05-01), Carlyle
patent: 2454341 (1948-11-01), Repka
patent: 2821610 (1958-01-01), Thomson et al.
patent: 3198925 (1965-08-01), Starrantino
patent: 3315049 (1967-04-01), Cain
patent: 3487182 (1969-12-01), Grundy
patent: 3646883 (1972-03-01), Provi

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