Method and means for testing thermostat operation

• US 3,262,314 A
• Filed: 08/08/1963
• Issued: 07/26/1966
• Est. Priority Date: 08/08/1963
• Status: Expired due to Term

• Current Assignee: James L. Gregg
• Original Assignee: James L. Gregg
• Inventors: Gregg, James L.
• Application Number:
  US04/300,860
• Time in Patent Office: 1,083 Days
• US Class Current: 374/114
• CPC Class Codes: F01P 11/00 Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
• CPC Class Codes: G05D 23/1921 using a thermal motor

Claims

1. IN TESTING MEANS, A FIRST TEMPERATURE RESPONSIVE RESISTANCE ELEMEENT ADAPTED TO BE MOUNTED ON AN INTERNAL COMBUSTION ENGINE BLOCK, A SECOND TEMPERATURE RESPONSIVE RESISTIVE ELEMENT ADAPTED TO BE SUPPORTED IN THE FLUID IN THE RADIATOR OF A VEHICLE, A BRIDGE CIRCUIT IN WHICH THE FIRST AND SECOND TEMPERATURE RESPONSIVE RESISTANCES FORM TWO OF THE ARMS, SAID BRIDGE CIRCUIT HAVING AN INPUT AND AN OUTPUT CIRCUIT, A SOURCE OF ELECTRICAL VOLTAGE CONNECTED ACROSS THE INPUT CIRCUIT OF THE BRIDGE, CURRENT INDICATING MEANS CONNECTED ACROSS THE OUTPUT CIRCUIT OF THE BRIDGE, A SECOND CURRENT INDICATING MEANS CONNECTED BETWEEN THE SOURCE OF ELECTRICAL VOLTAGE AND THE OUTPUT CIRCUIT OF THE BRIDGE SO THAT THE FIRST CURRENT INDICATING MEANS WILL INDICATE THE DIFFERENCE IN TEMPERATURE BETWEEN THE ENGINE BLOCK AND RADIATOR FLUID AND THE SECOND CUR-