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}
}