Traffic responsive control system for automatic swinging door
First Claim
1. In an automatic door installation having a swinging door, a power operator for swinging the door between a closed position thereof closing a doorway opening and an open position thereof on a swing side of the doorway opening, and a traffic responsive control system comprising radiant energy emitter and receiver means for sensing doorway traffic along a traffic path of travel through the doorway opening, and door control means operated by the traffic sensing means to automatically open the door for traffic to pass along said traffic path of travel, the improvement wherein the traffic sensing means comprises at least one multiple emitter sensor mounted on the door having a bank of a plurality of radiant energy emitters with radiant energy beams having axes angularly spaced along the said traffic path of travel and collectively providing an effective emitted energy coverage area intersecting the said traffic path of travel and radiant energy receiver means adjacent the bank of emitters for receiving reflected radiant energy emitted from the bank of emitters, the said one multiple emitter sensor being a swing side sensor mounted on the door on the swing side thereof adjacent one side edge of the door to provide a said effective coverage area on the swing side of the door which intersects the traffic path of travel when the door is in its said closed position, and wherein the traffic responsive control system further comprises door position responsive means for selectively operating the emitters of the said swing side sensor by selectively activating those emitters at a plurality of different radiant energy levels and deactivating those emitters to vary the said effective coverage area as the door is swung between its said closed and open positions.
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Accused Products
Abstract
An automatic door installation with two traffic sensors mounted on each side of the door adjacent the opposite side edges thereof, each having a reflected energy receiver and a plurality of radiant energy emitters with angularly spaced beam axes to provide broad coverage areas intersecting the traffic path of travel. The emitters of each sensor are selectively activated at different radiant energy levels and/or selectively deactivated to vary the affective coverage area as the door is swung between its closed and open positions.
61 Citations
26 Claims
- 1. In an automatic door installation having a swinging door, a power operator for swinging the door between a closed position thereof closing a doorway opening and an open position thereof on a swing side of the doorway opening, and a traffic responsive control system comprising radiant energy emitter and receiver means for sensing doorway traffic along a traffic path of travel through the doorway opening, and door control means operated by the traffic sensing means to automatically open the door for traffic to pass along said traffic path of travel, the improvement wherein the traffic sensing means comprises at least one multiple emitter sensor mounted on the door having a bank of a plurality of radiant energy emitters with radiant energy beams having axes angularly spaced along the said traffic path of travel and collectively providing an effective emitted energy coverage area intersecting the said traffic path of travel and radiant energy receiver means adjacent the bank of emitters for receiving reflected radiant energy emitted from the bank of emitters, the said one multiple emitter sensor being a swing side sensor mounted on the door on the swing side thereof adjacent one side edge of the door to provide a said effective coverage area on the swing side of the door which intersects the traffic path of travel when the door is in its said closed position, and wherein the traffic responsive control system further comprises door position responsive means for selectively operating the emitters of the said swing side sensor by selectively activating those emitters at a plurality of different radiant energy levels and deactivating those emitters to vary the said effective coverage area as the door is swung between its said closed and open positions.
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9. In an automatic door installation having a swinging door, a power operator for swinging the door between a closed position thereof closing a doorway opening and an open position thereof on a swing side of the doorway opening, and a traffic responsive control system comprising radiant energy emitter and receiver means for sensing doorway traffic along a traffic path of travel through the doorway opening, and door control means operated by the traffic sensing means to automatically open the door for traffic to pass along said traffic path of travel, the improvement wherein the traffic sensing means comprises at least one multiple emitter sensor mounted on each side of the door, each having a bank of a plurality of radiant energy emitters with radiant energy beams having axes angularly spaced along the said traffic path of travel and collectively providing an effective emitted energy coverage area intersecting the said traffic path of travel and radiant energy receiver means adjacent the bank of emitters for receiving reflected radiant energy emitted from the bank of emitters, the said one sensor on each side of the door being mounted adjacent one side edge of the door to provide a said effective coverage area on the respective side of the door which intersects the traffic path of travel when the door is in its said closed position, and wherein the traffic responsive control system further comprises door position responsive means for selectively operating the emitters of each said one sensor by selectively activating those emitters at a plurality of different radiant energy levels and deactivating those emitters to vary the respective effective coverage area as the door is swung between its said closed and open positions.
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10. In an automatic door installation having a swinging door, a power operator for swinging the door between a closed position thereof closing a doorway opening and an open position thereof on a swing side of the doorway opening, and a traffic responsive control system comprising radiant energy emitter and receiver means for sensing doorway traffic along a traffic path of travel through the doorway opening, and door control means operated by the traffic sensing means to automatically open the door for traffic to pass along said traffic path of travel, the improvement wherein the traffic sensing means comprises at least one multiple emitter sensor mounted on the door having a bank of a plurality of radiant energy emitters with radiant energy beams having axes angularly spaced along the said traffic path of travel and collectively providing an effective emitted energy coverage area intersecting the said traffic path of travel and radiant energy receiver means adjacent the bank of emitters for receiving reflected radiant energy emitted from the bank of emitters, the said one multiple emitter sensor being mounted on the door on said one side of the door which intersects the traffic path of travel when the door is in its said closed position, and wherein the traffic responsive control system further comprises door position responsive means for selectively operating the emitters by selectively activating those emitters at a plurality of different radiant energy levels and deactivating those emitters to vary the said effective coverage area as the door is swung between its said closed and open positions.
Specification