×

System for transmitting information of reduced pneumatic pressure of tire

  • US 3,895,347 A
  • Filed: 07/25/1974
  • Issued: 07/15/1975
  • Est. Priority Date: 09/10/1973
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for transmitting information of reduced pneumatic pressure of tires, comprising an electromagnetic wave radiation mechanism of an electric field excitation system having an electromagnetic wave radiation member consisting of a substantially concentric metal body opposedly and substantially concentrically provided on each axle of a plurality of tire wheels for actuating as an electric dipole together with the wheels and having an oscillator electrically coupled to said radiation member and energized in response to reduced pneumatic pressure of tires;

  • and at least one receiver antenna of an electromagnetic field sensing type provided in the space between the surface of the ground and the lower surface of the bottom plate of the car body for sensing a polarized wave of an electromagnetic field radiated from said radiation mechanism in order to screen external noise waves.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×