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Security Monitor for Office Equipment

IP.com Disclosure Number: IPCOM000052571D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Yount, WR: AUTHOR

Abstract

This system provides means for deterring the theft of office product equipment, e.g., typewriters. The concept for an electronic security monitor for office typewriters consists of small, low-power transmitter units installed on the typewriter and companion receiver units at remote locations to provide continuous surveillance and security monitoring means.

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Security Monitor for Office Equipment

This system provides means for deterring the theft of office product equipment, e.g., typewriters. The concept for an electronic security monitor for office typewriters consists of small, low-power transmitter units installed on the typewriter and companion receiver units at remote locations to provide continuous surveillance and security monitoring means.

This communications technique employs low-power devices where the radio frequency energy is conducted along the AC power line and requires no external wiring to be attached to the typewriter, nor any additional wiring to the office environment.

The AC power line serves as the carrier means and common communications link between the typewriter with its transmitting unit and a remote receiving unit serving as a security monitor. The transmission path must be over a common power line, which is usually the case in the same office complex.

The office typewriter would have a small transmitter installed within the typewriter covers. The transmitter would use a low power frequency modulated (FM) carrier that can be uniquely encoded by digital or analog means to designate a specific typewriter installation.

The transmitting unit on the typewriter will have a means of coupling the FM carrier output signals to the AC power line circuit via the typewriter power line cord.

The receiving unit for monitoring the transmitter will have a means of coupling to the AC power line circuit to rec...