Compact control and monitoring switch

Details Compact control and monitoring switch Compact control and monitoring switch

1994-11-01

1996-09-03

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307116, 307117, 307125, 137198, 137212, 137219, 303 82, 200 81R, 200 83W, 340632, H01H 3524

Patent

active

055526462

ABSTRACT:
A device for control and monitoring of pressure in a system combines a conventional three pole pressure switch with the following additional features: (1) a lock mechanism with three influencing input factors and a single resulting output contact action, (2) a three pole thermal release device as one of the input factors, and (3) a remote control tripping device as another input factor, all integrated into a single, compact, modular unit. The thermal release device comprises a plurality of bimetals which sense electrical flow passing through the device, and which are mechanically connected to a locking mechanism to shut off current if the electrical flow reaches a predetermined maximum. If any of the three inputs activates the locking mechanism, the device must be reset by an operator.

REFERENCES:
patent: 1841477 (1930-06-01), Henning
patent: 3454941 (1969-07-01), Voorman
patent: 3875358 (1975-04-01), Willcox
patent: 3949179 (1976-04-01), Bauer
patent: 4642478 (1987-02-01), Noth
patent: 4686834 (1987-08-01), Haley et al.
patent: 5209076 (1993-05-01), Kauffman et al.

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