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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. 5 figs.

Inventors:
Issue Date:
Research Org.:
Mason and Hanger Corporation
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
489086
Patent Number(s):
5633626
Application Number:
PAN: 8-520,634; TRN: 97:011396
Assignee:
Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
AC04-91AL65030
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 27 May 1997
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; INTRUSION DETECTION SYSTEMS; ALARM SYSTEMS; PHYSICAL PROTECTION; DESIGN; PERFORMANCE TESTING; MONITORING; REMOTE SENSING; SWITCHES; SIMULATION

Citation Formats

Cawthorne, D C. Self-testing security sensor for monitoring closure of vault doors and the like. United States: N. p., 1997. Web.
Cawthorne, D C. Self-testing security sensor for monitoring closure of vault doors and the like. United States.
Cawthorne, D C. Tue . "Self-testing security sensor for monitoring closure of vault doors and the like". United States.
@article{osti_489086,
title = {Self-testing security sensor for monitoring closure of vault doors and the like},
author = {Cawthorne, D 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. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {5}
}