Research/Patents/US 5054006
US 5054006

SEISMIC-ACOUSTIC DETECTION DEVICE

Assignee

Filed

Feb 19, 1970

Granted

Oct 1, 1991

Location

HATBORO PA US

Abstract

A detection system for indicating the presence of motorized equipment in aesignated area having an acoustic sensor, a seismic sensor and an acoustic signal transmitter. The seismic sensor output, processed to discriminate against vibrations of short duration, is fed along with the acoustic sensor output, to an "ANDing" circuit which gates the acoustic transmitter. The acoustic sensor output is passed to the transmitter only during coincidence of seismic and acoustic detection.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Mar 3, 1982

Rescinded

Aug 1, 1990

Duration

8 years, 5 months

Inventor

  • 1GEORGE A. GIMBER

Technology Domains

Click a domain to browse all patents in this category.

Back to patent indexSource: USPTO 35 USC §181 secrecy order records