Patent · US Expired

Batteryless sensor used in security applications

US5317303A · kind A · utility

29Cited by
7References
10Claims
0Family size

Assignees

Inventors

Key dates

Filing dateSep 11, 1992
Grant dateMay 31, 1994
Priority date
Expiry dateSep 11, 2012

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG08B25/10
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

A batteryless sensor includes a small and concealed permanent magnet motor which operates as a generator to convert rotational or translational energy to an ersatz Vcc transient power supply via a mechanical arrangement to radiate a coded VHF oscillator signal to a repeater or central processing unit located as far as one mile from the sensor. The receiver is able to monitor a multiplicity of sensor units over a given time period.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.