Ground circuit monitor

Details Ground circuit monitor Ground circuit monitor

1976-05-13

1978-04-04

Caldwell, Sr., John W.

Communications: electrical

Systems

Call station

5 68, 361 50, 361 77, G08B 2100

Patent

active

040830411

ABSTRACT:
An electric hospital bed system including a conducting frame and movable parts, an electric device for controlling the movements of the movable parts and a ground circuit monitor operatively connected between a power supply source and the electric device. The monitor continuously senses the integrity of the ground connection between the hospital bed system and the building ground bus-bar, including the ground line in the wall outlet. In the event the ground connection is broken or disconnected for any reason, the power supply to the electric device will be interrupted and switched to a warning device mounted in the hospital bed system or at a remote central monitoring station. The hospital bed system remains inoperative until the ground fault is located and the ground connection restored.

REFERENCES:
patent: 3426342 (1969-02-01), De Langis
patent: 3766434 (1973-10-01), Sherman
patent: 3996496 (1976-12-01), Volk, Jr.
The C-D Capacitor; vol. 22, No. 1; Jan. 1957; pp. 4, 5; Cornell-Dubilier Electric Corp., Hamilton BLvd., So. Plainfield, N. J.

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