System for sensing an obstruction between a movable panel and a

Details System for sensing an obstruction between a movable panel and a System for sensing an obstruction between a movable panel and a

1995-07-10

1997-01-07

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

49 27, 200 6143, E05F 1510, H01H 316

Patent

active

055920608

ABSTRACT:
A sensing system is provided which senses an obstruction between a closure member and a frame, regardless of the direction of the input force to the sensor, such that when the obstruction is sensed to be between the closure member and the frame, the operation of the closure member can be controlled to prevent further closing of the closure member upon the obstruction. The sensing system includes a membrane switch assembly which changes resistance when a force component caused by the obstruction is exerted on the switch assembly.

REFERENCES:
patent: 3133167 (1964-05-01), Miller
patent: 3693026 (1972-09-01), Miller
patent: 3855733 (1974-12-01), Miller
patent: 4051336 (1977-09-01), Miller
patent: 4273974 (1981-06-01), Miller
patent: 4317970 (1982-03-01), Hafner et al.
patent: 4621223 (1986-11-01), Murakami et al.
patent: 4920241 (1990-04-01), Miller

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