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. 11, 1998
Filed:
Feb. 29, 1996
James G Eagleson, Waukesha, WI (US);
Peter G Scharpf, Hartford, WI (US);
Hua Zong, Milwaukee, WI (US);
Paul R Ahlf, Oak Creek, WI (US);
Kurt P Schoeckert, Hartford, WI (US);
RF Technologies, Inc., Brookfield, WI (US);
Abstract
A security system for monitoring movement of persons in a secured area including set openings which includes area and opening monitors, tag units and an alarm system. The tag unit has special end clamp members which securely clamp an attachment strap to a housing for attaching the unit to a person. Tampering with the connection creates an alarm state. The tag unit includes a dual transmitter continuously transmitting very low frequency (VLF) signal and transmitting a very high frequency (VHF or UHF) signal only if the tag unit is tampered with. The opening monitor includes VLF receivers responsive to a VLF signal and transmitting an alarm signal to an opening alarm system to prevent unauthorized exit. Authorized personnel have a deactivation unit for timed receiver disabling for moving the person through the opening. The UHF transmitter is activated upon unauthorized tampering with the attached tag. A bank response alarm includes a plurality of distributed VHF or UHF receivers which responds to the VHF or UHF signal of any tag unit. A deactivation control is provided to authorized personnel to permit attachment and removal of the tag unit. Other interlocks may be provided including visual and/or audible alarms, tag identification and, data recording.