Back to results
US 5,495,984 AGranted
Energy saving optoelectronic code reading access device
AssigneeNovedades Electronicas Internacionales s.a. de C.V.
InventorJuan Santarriaga
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNovedades Electronicas Internacionales s.a. de C.V.
InventorJuan Santarriaga
Estimating the term…
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. This system further includes a timing circuit for periodically energizing and deenergizing heating, ventilating, and air-conditioning loads.
An energy saving, optoelectronic system for energizing and deenergizing electrical loads, comprising:
An energy saving, optoelectronic system for energizing and deenergizing electrical loads in a building, comprising;
An energy saving, optoelectronic system for energizing and deenergizing electrical loads in a hotel, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Characterised by the use of a variable reference value: associated with tele control
Systems for controlling or regulating non-electric variables
Term ended 22 Dec 2013 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to the field of energy saving devices which energize and deenergize the electrical loads in a room or in a building when such loads are not required to be in use. Specifically, the invention relates to an optoelectronic switching device which is actuated by an encoded photoelectric switching card which can be inserted in and removed from a card switching box to energize and deenergize HVAC and nonHVAC electrical loads responsive to the switching device. The present invention also comprises an HVAC cycling circuit capable of cycling the HVAC power loads on and off while the nonHVAC loads remain off, thereby providing continued climate control in a room or building where the HVAC systems operate.
2. Description of the Prior Art
FIGS. 1A and 1B are block diagrams of the present invention.
FIG. 2 is an exploded isometric view of the card switching box and photoelectric switching card.
FIG. 3 is a cutaway side view of the card switching box and circuit housing.
A basic block diagram of the present invention is shown in FIG. 1A. The light transmission source 10 transmits a light emission pattern which is received by the photoelectric receiving circuit 30. The photoelectric switching card 20 comprises a multiplicity of translucent regions 24 and nontranslucent regions 23. The photoelectric switching card 20 is removably insertable between the light transmission source 10 and the photoelectric receiving circuit 30. The gating circuit 40 is coupled to the photoelectric receiving circuit 30. In response to the signal received from the photoelectric receiving circuit 30, the gating circuit 40 transmits an output signal to the power switch 70 which in turn opens or closes to energize or deenergize loads 80. A time delay circuit 60 is actuated by a signal from the gating circuit 40 to transmit a time delay signal to gating circuit 40.
An HVAC cycling circuit 77 is actuated in response to an open circuit signal from gating circuit 40. HVAC cycling circuit 77 transmits alternate open circuit and close circuit signals to HVAC power switches 75, thereby alternately energizing and deenergizing HVAC loads 82.
FIG. 1B is a more detailed embodiment of the invention depicted in FIG. 1A. Light transmission source 10 comprises four individual light sources L1-L4. In a preferred embodiment, these light sources L1-L4 are light emitting diodes. Photoelectric receiving circuit 30 comprises four photoresistors F1-F4, each of said photoresistors is coupled to a transistor TR1-TR4, respectively. Each photoresistor F1-F4 emits an open transistor signal when it receives no light from its respective light source L1-L4. Each photoresistor F1-F4 emits a close transistor signal when it receives light from its respective individual light source L1-L4. The output of each transistor TR1-TR4 is a logic state 1 in response to an open transistor signal from its respective photoresistor F1-F4, and a logic state 0 in response to a close transistor signal from its respective photoresistor F1-F4.