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:
Aug. 10, 1976
Filed:
Aug. 30, 1972
George H Bleeker, Chicago, IL (US);
David G Geis, Chicago, IL (US);
Other;
Abstract
A centralized system for simultaneously monitoring a plurality of predetermined remote areas and selectively indicating an unauthorized intrusion into any of the areas. A preamplifier is placed in each of the areas for amplifying the electrical signals from each of a set of microphones in that area and the amplified signal is coupled to a central monitoring and alarm station. The central station may provide a sound level indicating lamp for each area, an alarm lamp to indicate when the sound in each area exceeds a predetermined background or threshold level, and a system for simultaneously listening to the actual sound in all of the remote areas or selectively listening to the sound in any one of the areas.