Air conditioning and heating control with automatic change-over

• US 3,373,799 A
• Filed: 11/14/1966
• Issued: 03/19/1968
• Est. Priority Date: 11/14/1966
• Status: Expired due to Term

• Current Assignee: Alwin B. Newton
• Original Assignee: Alwin B. Newton
• Inventors: Newton, Alwin B.
• Application Number:
  US04/593,928
• Time in Patent Office: 491 Days
• US Class Current: 165/259
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F24F 11/88 Electrical aspects, e.g. circuits
• CPC Class Codes: G05D 23/275 with sensing element expanding, contracting, or fusing in response to changes of temperature

Claims

1. A CONTROL SYSTEM FOR AN AIR CONDITIONING UNIT OF THE TYPE INCLUDING A HEATER AND A COOLER FOR SUPPLYING CONDITIONED AIR TO A CONTROLLED SPACE, SAID SYSTEM COMPRISING A THERMOSTAT SENSING TEMPERATURE OF AIR IN SAID CONTROLLED SPACE;

A FIRST SWITCH ACTUATED BY SAID THERMOSTAT;

A SECOND SWITCH SELECTIVELY PLACING SAID FIRST SWITCH OVER THE EXCLUSIVE CONTROL OF SAID HEATER AND SAID COOLER;

A TIMER INCLUDING SWITCH ACTUATING MEANS FOR SAID SECOND SWITCH, A CONTINUOUSLY DRIVEN MOTOR AND A CLUTCH INTERPOSED BETWEEN SAID MOTOR AND SAID SWITCH ACTUATING MEANS, SAID SWITCH ACTUATING MEANS BEING ADAPTED TO SHIFT SAID SECOND SWITCH FROM A FIRST POSITION WHEREBY THE HEATER IS UNDER EXCLUSIVE CONTROL OF SAID FIRST SWITCH AND A SECOND POSITION WHEREIN SAID COOLER IS UNDER THE EXCLUSIVE CONTROL OF SAID FIRST SWITCH;

AND CLUTCH ACTUATING MEANS OPERATED BY SAID SECOND SWITCH FOR ENGAGING SAID CLUTCH TO EFFECT A DRIVING CONNECTION BETWEEN SAID MOTOR AND SAID SWITCH ACTUATING MEANS DURING PERIODS WHEN NEITHER SAID HEATER NOR SAID COOLER IS ENERGIZED.