The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 1986
Filed:
Jun. 21, 1984
Henry V Allen, Fremont, CA (US);
Transensory Devices, Inc., Fremont, CA (US);
Abstract
A system for monitoring vehicle tire pressure, or the like. The system includes a transmitter and a receiver mounted on the vehicle body, and magnetically coupled inductor and enhancer circuits carried on the vehicle wheel. The inductor circuit contains an open/closed condition switch which is responsive to tire pressure. The transmitter signal, acting through the inductor and enhancer circuits, produces a response voltage in the receiver which varies at a selected transmitter frequency according to the condition of the switch. In one embodiment of the invention, the inductor and enhancer circuits are tuned to enhance the response voltage in the receiver, at a selected transmitter frequency and at one inductor circuit switch condition. In a second embodiment, the inductor and enhancer circuits are tuned to produce receiver signals which have one signal-to-noise ratio peak at one transmitter frequency and with the pressure switch in one condition, and a second signal-to-noise ratio peak, at a second transmitter frequency and with the switch in its other condition.