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Title: Self-testing security sensor for monitoring closure of vault doors and the like

Abstract

A self-testing device is provided for a monitoring system for monitoring whether a closure member such as a door or window is closed. The monitoring system includes a switch unit mounted on the frame of the closure member being monitored and including magnetically biased switches connected in one or more electrical monitoring circuits, and a door magnet unit mounted on the closure member being monitored. The door magnet includes one or more permanent magnets that produce a magnetic field which, when the closure member is closed, cause said switches to assume a first state. When the closure member is opened, the switches switch to a second, alarm state. The self-testing device is electrically controllable from a remote location and produces a canceling or diverting magnetic field which simulates the effect of movement of the closure member from the closed position thereof without any actual movement of the member.

Inventors:
 [1]
  1. Amarillo, TX
Issue Date:
Research Org.:
MASON & HANGER CORP
OSTI Identifier:
870972
Patent Number(s):
5633626
Application Number:
08/520,634
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G08 - SIGNALLING G08B - SIGNALLING OR CALLING SYSTEMS
DOE Contract Number:  
AC04-91AL65030
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
self-testing; security; sensor; monitoring; closure; vault; doors; device; provided; door; window; closed; switch; unit; mounted; frame; monitored; including; magnetically; biased; switches; connected; electrical; circuits; magnet; permanent; magnets; produce; magnetic; field; assume; alarm; electrically; controllable; remote; location; produces; canceling; diverting; simulates; effect; movement; position; permanent magnet; magnetic field; permanent magnets; closed position; remote location; testing device; monitoring circuit; switches connected; electrically controllable; magnetically bias; /340/335/

Citation Formats

Cawthorne, Duane C. Self-testing security sensor for monitoring closure of vault doors and the like. United States: N. p., 1997. Web.
Cawthorne, Duane C. Self-testing security sensor for monitoring closure of vault doors and the like. United States.
Cawthorne, Duane C. Tue . "Self-testing security sensor for monitoring closure of vault doors and the like". United States. https://www.osti.gov/servlets/purl/870972.
@article{osti_870972,
title = {Self-testing security sensor for monitoring closure of vault doors and the like},
author = {Cawthorne, Duane C},
abstractNote = {A self-testing device is provided for a monitoring system for monitoring whether a closure member such as a door or window is closed. The monitoring system includes a switch unit mounted on the frame of the closure member being monitored and including magnetically biased switches connected in one or more electrical monitoring circuits, and a door magnet unit mounted on the closure member being monitored. The door magnet includes one or more permanent magnets that produce a magnetic field which, when the closure member is closed, cause said switches to assume a first state. When the closure member is opened, the switches switch to a second, alarm state. The self-testing device is electrically controllable from a remote location and produces a canceling or diverting magnetic field which simulates the effect of movement of the closure member from the closed position thereof without any actual movement of the member.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {5}
}

Patent:

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