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US 5,206,521 AGranted
Energy saving optoelectronic code reading access device
AssigneeNovedades Electronicas Internacionales s.a. de C.V.
InventorsGregorio Ruiz, Juan Santarriaga
Life of this patent
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Abstract
An energy saving, optoelectronic system provides a means for energizing and deenergizing electrical loads. The system includes a continuous light transmission source and a light receiving circuit that senses a light pattern and, in response, develops a first or a second output signal. The system also includes a gating circuit that receives the output signal. The gating circuit comprises a logic circuit arranged such that the receiving circuit will transmit the second output signal upon receiving a predetermined light signal. The system further includes a power switch that is open in response to an open circuit signal from the gating circuit and is closed in response to close circuit signal from the gating circuit.
Claims22
An energy saving, optoelectronic system for energizing and deenergizing electrical loads, comprising:
- (a) a light transmission source emitting a continuous light signal;
- (b) a photoelectric receiving circuit placed to a receive a continuous light signal from said light transmission source, and to transmit a first output signal or a second output signal in response to the particular light signal received from said light transmission source;
- (c) photoelectric switching card removably insertable between said light transmission source and said receiving circuit, such that when said switching card is not inserted, said receiving circuit receives an unabbreviated light signal from said light transmission source and transmits a first output signal, and when said switching card is inserted, said receiving circuit receives a predetermined, unique, abbreviated light signal from said light source and transmits a second output signal;
- (d) a gating circuit coupled to receive output signals from said receiving circuit such that said gating circuit transmits an open circuit signal in response to a first output signal and transmits a close circuit signal in response to a second output signal, the gating circuit comprising NOT gates arranged such that the receiving circuit will transmit the second output signal upon receiving the predetermined light signal;
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- (e) a power switch coupled to said gating circuit such that said power switch is open in response to an open circuit signal from said gating circuit and said power switch is closed in response to a close circuit signal from said gating circuit.
3 more elements
An energy saving, optoelectronic system for energizing and deenergizing electrical loads in a building, comprising;
- (a) a light transmission circuit comprising a multiplicity of continuous light sources arranged in a predetermined geometric pattern, each of said light sources emitting an individual light beam such that said light sources collectively transmit a predetermined light emission pattern;
- (b) a photoelectric switching card comprising a multiplicity of translucent and nontranslucent regions arranged in a predetermined geometric pattern such that when said switching card is inserted in a predetermined location in the path of light beams emitted by said light sources, a predetermined abbreviated light emission pattern passes through said switching card;
- (c) a photoelectric receiving circuit placed to receive a continuous light emission pattern from said light sources such that when an unabbreviated light emission pattern is received, said receiving circuit transmits a first output signal and when a predetermined abbreviated continuous light emission pattern is received, said receiving circuit transmits a second output signal;
- (d) a gating circuit coupled to receive output signals from said receiving circuit such that said gating circuit transmits an open circuit signal in response to a first output signal and transmits a close circuit signal in response to a second output signal, the gating circuit comprising NOT gates arranged such that the receiving circuit will transmit the second output signal upon receiving the predetermined light signal;
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- (e) a power switch coupled to said gating circuit such that said power switch is opened in response to an open circuit signal from said gating circuit and said power switch is closed in response to a close circuit signal from said gating circuit.
3 more elements
An energy saving, optoelectronic system for energizing and deenergizing electrical loads in a hotel, comprising:
- (a) a light transmission circuit mounted on a planar circuit board comprising a multiplicity of light emitting diodes arranged in a predetermined geometric pattern, each of said light emitting diodes emitting an individual continuous light beam such that said light emitting diodes collectively transmit a light emission pattern;
- (b) a photoelectric switching card equivalent in size to a conventional credit card, said photoelectric switching card comprising a multiplicity of translucent and nontranslucent regions arranged in a predetermined geometric pattern such that when said switching card is inserted in a predetermined location in the path of light emitted by said light emitting diodes, a predetermined abbreviated light emission pattern passes through said switching card;
- (c) a photoelectric receiving circuit mounted on a planar circuit board, said photoelectric receiving circuit placed to received a continuous light emission pattern from said light emitting diodes such that when an unabbreviated continuous light emission pattern is received, said receiving circuit transmits a first output signal and when a predetermined abbreviated continuous light emission pattern is received, said receiving circuit transmits a second output signal;
- (d) a gating circuit mounted on a planar circuit board, said gating circuit coupled to receive output signals from said receiving circuit such that said gating circuit transmits an open circuit signal in response to a first output signal and transmits a close circuit signal in response to a second output signal, the gating circuit comprising NOT gates arranged such that the receiving circuit will transmit the second output signal upon receiving the predetermined light signal;
- (e) a power switch coupled to said gating circuit such that said power switch is opened in response to an open circuit signal from said gating circuit and said power switch is closed in response to a close circuit signal from said gating circuit;
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- (f) a time delay circuit coupled to said gating circuit such that when said switching card is removed from between said light transmission circuit and said receiving circuit, said time delay circuit transmits a delay signal to said gating circuit which delays said gating circuit from transmitting an open circuit signal to said power switch for a predetermined time period.
4 more elements
Dependencies are inferred from the claim text.