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Jerry R Whittaker, 884621 Wellington Pt Ln, Knoxville, TN 37938

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4621 Wellington Pt Ln, Knoxville, TN 37938    865-9220636   

2701 Byington Beaver Ridge Rd, Knoxville, TN 37931    865-6701184   

Knox, TN   

4437 Clemice Ln, Montgomery, AL 36106    334-2738557    334-3957230   

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Jerry Whittaker

Licenses:
License #: 2705041859 - Expired
Category: Contractor
Issued Date: Nov 3, 1997
Expiration Date: Nov 30, 2001
Type: Class B

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Jerry Whittaker

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Us Patents

Acoustic Emission Intrusion Detector

US Patent:
4196423, Apr 1, 1980
Filed:
Aug 9, 1978
Appl. No.:
5/932150
Inventors:
Donald W. Carver - Knoxville TN
Jerry W. Whittaker - Knoxville TN
Assignee:
The United States of America as represented by the United States
Department of Energy - Washington DC
International Classification:
G08B 1322
US Classification:
340566
Abstract:
An intrusion detector is provided for detecting a forcible entry into a secured structure while minimizing false alarms. The detector uses a piezoelectric crystal transducer to sense acoustic emissions. The transducer output is amplified by a selectable gain amplifier to control the sensitivity. The rectified output of the amplifier is applied to a Schmitt trigger circuit having a preselected threshold level to provide amplitude discrimination. Timing circuitry is provided which is activated by successive pulses from the Schmitt trigger which lie within a selected time frame for frequency discrimination. Detected signals having proper amplitude and frequency trigger an alarm within the first complete cycle time of a detected acoustical disturbance signal.

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