Hall effect alarm pull station
AssigneeHoneywell Inc.
InventorRudolf J. Schwarzer
Life of this patent
Estimating the term…
Abstract
An alarm pull station is provided having a housing for attachment to a support, a manually movable member mounted within the housing and having a magnet attached thereto, and a Hall effect switching device responsive to movement of the magnet for providing an output signal. The Hall effect switching device can include first and second Hall effect sensors arranged for providing three levels of output signal, a first normal level when the manually movable member is in its original, unoperated position, an alarm level when the manually movable member is operated, and a trouble level when the pull station is subject to tampering.
Claims6
An alarm pull station comprising:
- a housing for attachment to a support;
- a manually movable member mounted within said housing;
- magnet means attached to one of said housing and said manually movable member;
- and,
- Hall effect sensing means attached to the other of said housing and said manually movable member responsive to movement of said magnet means for providing an output signal, said Hall effect sensing means comprising first and second Hall effect sensors arranged for providing three levels of output signal, a first normal level when said manually movable member is in its original, unoperated position, an alarm level when said manually movable member is operated, and a trouble level when said pull station is subjected to tampering.
A manual alarm pull station for providing an alarm output signal when said pull station is manually activated, said alarm output signal being useful for providing an indication of an alarm condition, said pull station comprising:
- a housing for attachment to a support;
- a manually movable member mounted within said housing, said housing having an opening for permitting access to said manually movable member;
- magnet means attached to one of said housing and said manually movable member;
- and,
- Hall effect sensing means attached to the other of said housing and said manually movable member responsive to movement of said magnetic means for providing an alarm output signal, said Hall effect sensing means comprising first and second Hall effect sensors arranged for providing three levels of output signal, a first normal level when said manually movable member is in its original, unoperated position, an alarm level when said manually movable member is operated, and a trouble level when said pull station is subjected to tampering.
Dependencies are inferred from the claim text.