Sensing edge

Details Sensing edge Sensing edge

1992-09-08

1993-11-16

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Feeler moves into detecting contact with object

H01H 316

Patent

active

052626032

ABSTRACT:
The present invention includes a sensing edge for controlling movement of a door by actuation of a device upon force being applied to the sensing edge. The sensing edge includes a base member for being secured to the leading edge of a door and a sheath having a plurality of internal cavities extending therethrough for receiving a switch comprising two electrical contacts. The sensing edge assists in providing a failsafe feature for detecting electrical problems (such as open circuits) in the electrical contacts. According to one embodiment of the present invention, the failsafe feature is achieved using an electrical connector, positioned within the sheath, which electrically connects the electrical contacts.

REFERENCES:
patent: 3693026 (1972-09-01), Miller
patent: 3754176 (1973-08-01), Miller
patent: 3855733 (1974-12-01), Miller
patent: 4317970 (1982-03-01), Hafner et al.
patent: 4785143 (1988-11-01), Miller
patent: 4972054 (1990-11-01), Miller et al.
patent: 5148911 (1992-09-01), Miller et al.

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