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ELECTRIC ALARM DEVICE FOR INDICATING THE VARIATION OF A PHYSICAL QUANTITY IN A VEHICLE TIRE

  • US 3,859,628 A
  • Filed: 06/11/1973
  • Issued: 01/07/1975
  • Est. Priority Date: 06/16/1972
  • Status: Expired due to Term
First Claim
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1. Apparatus for monitoring a physical quantity in a pneumatic tire and foR providing an indication of a variation in said physical quantity outside a preset acceptable limit, said apparatus comprising:

  • a. a battery having two electrodes and an electrolyte contained in an outer casing, said electrolyte being contained in a sealed container within said outer casing;

    b. detector means for monitoring said physical quantity and detecting said variation outside said preset acceptable limit; and

    c. means coupled to said detector means to open said sealed casing when said variation is detected, thereby permitting contact between said electrolyte and said electrodes to generate a voltage output.

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