Photoelectric control device responsive to two light sources

• US 3,160,757 A
• Filed: 04/19/1962
• Issued: 12/08/1964
• Est. Priority Date: 04/19/1962
• Status: Expired due to Term

• Current Assignee: Raymond J. Mcallise
• Original Assignee: Raymond J. Mcallise
• Inventors: Mcallise, Raymond J.
• Application Number:
  US04/188,667
• Time in Patent Office: 964 Days
• US Class Current: 250/208.4
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Claims

1. A PHOTOELECTRIC CONTROLLER COMPRISING A PHOTOSENSITIVE DEVICE INCLUDING AN ELECTRON FLOW CONTROL ELEMENT HAVING AN OUTPUT TERMINAL AND ALSO INCLUDING MEANS SEPARATE FROM SAID ELECTRON FLOW CONTROL ELEMENT AND RESPONSIVE TO ILLUMINATION FROM A FIRST LIGHT SOURCE FOR CONTROLLING SAID ELECTRON FLOW CONTROL ELEMENT TO PRODUCE A FIRST OUTPUT SIGNAL AT SAID OUTPUT TERMINAL WHEN SAID ILLUMINATION EXCEEDS A PREDETERMINED VALUE AND TO PRODUCE A SECOND OUTPUT SIGNAL WHEN SAID ILLUMINATION IS LESS THAN SAID PREDETERMINED VALUE, AND A PHOTOSENSITIVE SWITCH CIRCUIT HAVING AN INPUT TERMINAL CONNECTED TO SAID OUTPUT TERMINAL OF SAID ELECTRON FLOW CONTROL ELEMENT WHICH SWITCH CIRCUIT INCLUDES A SECOND OUTPUT TERMINAL, A SECOND ELECTRON FLOW CONTROL DEVICE AND MEANS RESPONSIVE TO ILLUMINATION FROM A SECOND LIGHT SOURCE AND ALSO TO SAID OUTPUT SIGNALS APPEARING AT SAID FIRST MENTIONED OUTPUT TERMINAL FOR CONTROLLING SAID SECOND ELECTRON FLOW CONTROL ELEMENT TO PRODUCE A GIVEN OUTPUT SIGNAL AT SAID SECOND OUTPUT TERMINAL ONLY WHEN SAID SECOND OUTPUT IS PRESENT AND WHEN AT THE SAME TIME SAID ILLUMINATION FROM SAID SECOND LIGHT SOURCE EXCEEDS A PREDETERMINED VALUE.