Light barrier, particularly for automatically actuated lift cabi

Details Light barrier, particularly for automatically actuated lift cabi Light barrier, particularly for automatically actuated lift cabi

1982-11-22

1984-06-05

Kannan, Philip C.

Movable or removable closures

Radiant energy control

49 28, 49 31, 187 52R, E05F 1520

Patent

active

044520093

ABSTRACT:
A light barrier is restricted to detecting blockage in a limited, constant region before the closing edges of a lift cabin-twin door. Two light emitters or transmitters are displaceably arranged in the door sill and are operatively associated with entrainment elements fastened to the lift cabin doors. The light emitters are synchronously displaced with light receivers mounted at the upper edges of the cabin doors. To increase reliability of operation, the lower edges of the lift cabin doors are provided with cleaning devices which clean the light exit locations of infrared luminescent or light-emitting diodes forming the light emitters during every opening and closing operation. Thus, the cleaning device of one door is arranged to clean the infrared luminescent diode of the light emitter of the other door and vice versa.

REFERENCES:
patent: 3063516 (1962-11-01), Duncan et al.
patent: 3903996 (1975-09-01), Berkovitz et al.
patent: 4029176 (1977-06-01), Mills

Affiliated with

Also associated with

Rating

Light barrier, particularly for automatically actuated lift cabi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light barrier, particularly for automatically actuated lift cabi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light barrier, particularly for automatically actuated lift cabi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1491388