Sensor strip

Details Sensor strip Sensor strip

1989-08-30

1990-07-31

Kannan, Philip C.

Movable or removable closures

Safety means responsive to obstruction to closure

Sensing shoe on leading edge

49 28, 200 6143, 25022721, 25022732, 2502311, E05F 1520

Patent

active

049441167

ABSTRACT:
A sensing strip for stopping or reversing the drive of a door or other movable member having an edge along which the hollow light guide profile is provided. The sensing strip has an elongated hollow body connected to the edge of the door by a support and is formed internally with a hollow light guide profile forming the leading edge with the body. This profile has an elongated slit which spreads upon deformation of said body to permit escape of light forming light beam traversing the hollow light guide profile, thereby diminishing the lighting reaching a receiver at an end of the sensing strip.

REFERENCES:
patent: 4143367 (1979-03-01), Schestag
patent: 4274226 (1981-06-01), Evans
patent: 4482890 (1984-11-01), Forbes et al.

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