Safety detection system for sliding doors
First Claim
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1. A safety system for detecting an obstruction in a hallway approaching a set of sliding doors moving along a threshold, said safety system comprising:
- a plurality of transmitters emitting a signal into said hallway at a preset range of angles with respect to said threshold, each of said plurality of transmitters having a light emitting device with a light emitting device centerline and a transmitter lens with a transmitter lens centerline, said transmitter lens centerline being offset from said light emitting device centerline to emit said signal from said light emitting device into said hallway at said preset range of angles; and
a plurality of detectors receiving said signal reflected from said obstruction, each of said plurality of detectors having an optical device with an optical device centerline and a detector lens with a detector lens centerline, said detector lens centerline being offset from said optical device centerline to receive said signal reflected from said obstruction at said preset range of angles.
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Abstract
A safety system for detecting an obstruction approaching closing doors includes a transmitter stack and a detector stack. Each transmitter stack includes a plurality of transmitter three-dimensional lenses. Each detector stack includes a plurality of detector three-dimensional lenses. The three-dimensional lenses are offset from the corresponding optical devices to angle an outgoing or incoming signal. The present invention results in more compact packaging for the safety system and in reduced cost of the assembly therefor.
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Citations
9 Claims
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1. A safety system for detecting an obstruction in a hallway approaching a set of sliding doors moving along a threshold, said safety system comprising:
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a plurality of transmitters emitting a signal into said hallway at a preset range of angles with respect to said threshold, each of said plurality of transmitters having a light emitting device with a light emitting device centerline and a transmitter lens with a transmitter lens centerline, said transmitter lens centerline being offset from said light emitting device centerline to emit said signal from said light emitting device into said hallway at said preset range of angles; and a plurality of detectors receiving said signal reflected from said obstruction, each of said plurality of detectors having an optical device with an optical device centerline and a detector lens with a detector lens centerline, said detector lens centerline being offset from said optical device centerline to receive said signal reflected from said obstruction at said preset range of angles. - View Dependent Claims (2, 3, 4)
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5. An assembly for transmitting a signal at an angle, said assembly comprising:
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a circuit board having a circuit board opening and a first side and a second side; an optical device attaching onto said first side of said circuit board and projecting a signal through said circuit board opening, said optical device having an optical device centerline; and a lens disposed on said second side of said circuit board, said lens being offset from said optical device centerline to angle said signal emitted from said optical device. - View Dependent Claims (6, 7, 8)
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9. An assembly comprising:
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an optical device having an optical device centerline, said optical device communicating a signal; and a lens having a lens centerline, said lens centerline being offset from said optical device centerline to direct said signal at an angle to said optical device centerline and said lens centerline.
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Specification