Vehicle engine coolant condition indicator

• US 3,302,171 A
• Filed: 10/01/1964
• Issued: 01/31/1967
• Est. Priority Date: 10/01/1964
• Status: Expired due to Term

• Current Assignee: William J. Sensing
• Original Assignee: William J. Sensing
• Inventors: Sensing, William J.
• Application Number:
  US04/400,865
• Time in Patent Office: 852 Days
• US Class Current: 340/449
• CPC Class Codes: B60R 16/0232 for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
• CPC Class Codes: F01P 11/14 Indicating devices; Other safety devices

Claims

1. AN INDICATING DEVICE COMPRISING:

AN ELECTRICAL POWER SOURCE;

INDICATING MEANS, MEANS CONNECTING ONE SIDE OF SAID INDICATING MEANS TO ONE SIDE OF SAID POWER SOURCE;

FIRST MEANS RESPONSIVE TO A FIRST TEMPERATURE RANGE TO ESTABLISH A CONDUCTIVE PATH BETWEEN THE OPPOSITE SIDE OF SAID ELECTRICAL POWER SOURCE AND THE INDICATING MEANS;

SECOND MEANS RESPONSIVE TO A SECOND TEMPERATURE RANGE;

AND THIRD MEANS RESPONSIVE TO A PRESSURE RANGE AND COOP-