Back to results
US 5,208,579 AGranted
Alarm system
OwnerChiang S. Tsenginventor
Life of this patent
Estimating the term…
Abstract
An improved alarm system having a first electrode carried by at least one of the locking elements and a second electrode carried by the locking surface normally engageable by the locking elements when the locking mechanism is in its locked configuration, and an alarm system including an alarm signal generator and a plurality of event detection sensors, one of which is formed by the first and second locking elements, the sensors being coupled to the signal generator such that an event detected by any sensor causes the generator to develop an alarm signal.
Claims11
An improved alarm system comprising:
- a locking mechanism including:
- a fixed body;
- a movable body movable relative to said fixed body and operative to perform a locking function;
- a plurality of locking elements individually movable between a first position in which movement of said movable body relative to said fixed body is prevented by engagement of at least one of said locking elements with a blocking surface, and a second position in which no locking element engages said blocking surface and movement between said movable body and said fixed body is permitted;
- first electrode means formed by at least one of said locking elements;
- and
- second electrode means formed by said blocking surface, at least one of said first and second electrode means being electrically insulated from the other components of said locking mechanism;
- alarm means including:
- an alarm signal generator and
- a plurality of event-detection sensors, said first and second electrode means forming one of said sensors, said sensors being coupled to said signal generator such that an event detected by any one of said sensors will cause said generator to develop an alarm signal;
- and
- switching means for disabling said alarm means,
- said switching means being coupled to said movable body and operable to enable said alarm means when said movable body is in a position such that said locking mechanism is locked and is operable to disable said alarm means when said movable body is in a position such that said locking mechanism is unlocked.
10 more elements
An improved alarm system comprising:
- a locking mechanism including:
- a fixed body;
- a movable body movable relative to said fixed body and operative to perform a locking function;
- a plurality of tumblers individually movable between a first position in which movement of said movable body relative to said fixed body is prevented by engagement of at least one of said tumblers with a blocking surface, and a second position in which no tumbler engages said blocking surface and movement between said movable body and said fixed body is permitted;
- first electrode means formed by at least one of said tumblers;
- and
- second electrode means formed by said blocking surface, at least one of said first and second electrode means being electrically insulated from the other components of said locking mechanism;
- alarm means including:
- an alarm signal generator and
- a plurality of event-detection sensors, said first and second electrode means forming one of said sensors, said sensors being coupled to said signal generator such that an event detected by any one of said sensors will cause said generator to develop an alarm signal;
- and
- switching means for disabling said alarm means,
- said switching means being coupled to said movable body and operable to enable said alarm means when said movable body is in a position such that said locking mechanism is locked and is operable to disable said alarm means when said movable body is in a position such that said locking mechanism is unlocked.
10 more elements
An improved alarm system comprising:
- a locking mechanism including:
- a fixed body;
- a movable body movable relative to said fixed body and operative to perform a choking function;
- a plurality of tumblers individually engageable by a key and movable thereby between a first position in which movement of said movable body relative to said fixed body is prevented by engagement of at least one of said tumblers with a blocking surface, and a second position in which no tumbler engages said blocking surface and movement between said movable body and said fixed body is permitted;
- first electrode means formed by at least one of said tumblers;
- and
- second electrode means formed by said blocking surface, at least one of said first and second electrode means being electrically insulated from the other components of said locking mechanism;
- alarm means including:
- an alarm signal generator and
- a plurality of event-detection sensors, said first and second electrode means forming one of said sensors, said sensors being coupled to said signal generator such that an event detected by any one of said sensors will cause said generator to develop an alarm signal;
- and
- switching means for disabling said alarm means,
- said switching means being coupled to said movable body and operable to enable said alarm means when said movable body is in a position such that said locking mechanism is locked and is operable to disable said alarm means when said movable body is in a position such that said locking mechanism is unlocked.
10 more elements
Dependencies are inferred from the claim text.