Apparatus for detecting door movement data in an automatic door

Details Apparatus for detecting door movement data in an automatic door Apparatus for detecting door movement data in an automatic door

1986-06-23

1987-09-22

Kannan, Philip C.

Movable or removable closures

Radiant energy control

E05F 1520

Patent

active

046946071

ABSTRACT:
An apparatus for detecting door movement data in an automatic door system is improved in that an opening-direction sensor and a closing-direction sensor are provided on a horizontal member of a slide door frame, while a slide door is provided with a dog having a plurality of actuating portions adapted to switch ON or OFF the opening-direction sensor and the closing-direction sensor as arrayed at an interval in the direction of sliding, so that the opening direction sensor and the closing direction sensor may be switched ON and OFF repeatedly as the door is moved in the opening or closing direction.

REFERENCES:
patent: 4009476 (1977-02-01), Lutz
patent: 4029176 (1977-06-01), Mills
patent: 4296570 (1981-10-01), Balbach et al.
patent: 4330960 (1982-05-01), Hasemann et al.
patent: 4452014 (1984-06-01), Markus

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