Automatic door safety system
First Claim
1. An automatic sliding door structure comprising a door adapted to be mounted for movement in the doorway of a support structure, a plurality of presence sensing beam producing transducers arranged to produce presence sensing beams in overlapping relation to one another, spanning the path of movement of the door and extending at least a predetermined distance on each side of the doorway, power means for actuating the door, means actuated upon movement of the door in both directions of movement for switching the transducers on sequentially in the door opening mode and for switching the transducers off sequentially in the door closing mode and means providing a predetermined pulsing of the transducers and the beams produced thereby.
1 Assignment
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Accused Products
Abstract
A system for controlling the opening and closing operation of a sliding door wherein at least two presence sensing detectors are disposed effective to cast beams in overlapping relation to one another and extending across the pathway of the door to be controlled, and manual means or motion detecting detectors effective to provide for the initiation of movement of the door to open position. Furthermore programmed computer means are included in the system for the controlled sequencing and pulsing of the presence sensing beams in the opening and closing operation of the door.
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Citations
21 Claims
- 1. An automatic sliding door structure comprising a door adapted to be mounted for movement in the doorway of a support structure, a plurality of presence sensing beam producing transducers arranged to produce presence sensing beams in overlapping relation to one another, spanning the path of movement of the door and extending at least a predetermined distance on each side of the doorway, power means for actuating the door, means actuated upon movement of the door in both directions of movement for switching the transducers on sequentially in the door opening mode and for switching the transducers off sequentially in the door closing mode and means providing a predetermined pulsing of the transducers and the beams produced thereby.
- 6. A system for a sliding door structure, which comprises side boards, a header connecting the side boards, a floor on which the structure is mounted, a sliding door movable to open and closed position in the doorway formed by the header, side boards and floor, presence sensing detectors mounted on the header effective when on to produce presence sensing beams in overlapping relation to one another and extending at least a predetermined distance on each side of the doorway in the pathway of movement of the door, switches with each of the detectors for controlling their operation, means on the door for tripping the switches on in a door opening condition and for tripping the switches off in a door closing condition and means for the predetermined sequencing and pulsing actuation of the detectors and the beams produced thereby as controlled by the actuation of the switches.
- 11. Control mechanism for an automatic sliding door having power means for moving the door from closed to open position and the reverse thereof comprising at least two object presence sensing transducers arranged above the door and spaced from one another effective when on to each produce an object sensing beam in overlapping relation to one another and spanning the pathway of movement of the door and extending a predetermined distance on each side of the doorway, means actuated by the movement of the door to place the transducers in beam producing relation such that upon opening movement of the door the transducers are placed in operation as the leading edge of the door passes each of the transducers and upon closing movement of the door the transducers are shut off as the leading edge of the door approaches the transducers and means providing for the sequencing and pulsing actuation of transducers in a predetermined manner as they are operated.
Specification