Door burglar alarm system
AssigneePower Systems Development Corporation
InventorWalter W. Hoinski
Life of this patent
Estimating the term…
Abstract
A door burglar alarm system having, preferably, a door movement intercepting component which may be moved easily in the direction of door movement by an opening motion of a door and which may be connected to a trigger mechanism to initiate an alarm signal in response to a predetermined distance having been traversed by the intercepting component, this intercepting component whereupon may provide a positive resistance prohibiting the further movement thereof in the direction of opening the door whereby the door is also prohibited from opening further.
Claims10
A door burglar alarm for mounting to a door jamb comprising:
- a bolt slidable into a position for intercepting the travel of said door;
- means for supporting said bolt in proximity to said door jamb, said supporting means permitting movement of said bolt by said travel of said door, whereof said supporting means is mounted to said door jamb and wherein said supporting means includes a base support bracket capable of mounting to said door jamb and a swivel plate pivotally mounted to said base support bracket, said swivel plate being associated with said bolt;
- means, associated with said supporting means and said bolt for initiating an alarm signal as a function of the relative position of said bolt with respect to said supporting means wherein said alarm signal initiating means, said supporting means and said bolt coacting with minimal friction;
- and
- means associated with said supporting means, for positively limiting the distance of travel of said bolt and therefore the travel of said door.
A door burglar alarm for mounting to a door jamb, comprising:
- means for intercepting the travel of said door;
- means for supporting said door intercepting means in proximity to said door jamb, said supporting means permitting movement of said intercepting means by said travel of said door, whereof said supporting means is mounted to said door jamb;
- means, associated with said supporting means and said intercepting means for initiating an alarm signal as a function of the relative position of said intercepting means with respect to said supporting means, wherein said supporting means includes a base support bracket capable of mounting to said door jamb and a swivel plate pivotally mounted to said base support bracket, said swivel plate being associated with said intercepting means;
- and
- means, associated with said supporting means, for positively limiting the distance of travel of said intercepting means and therefore the travel of said door, wherein said limiting means includes an opening in said base support bracket through which said intercepting means operates, said opening defining the limits of operation for said intercepting means.
Dependencies are inferred from the claim text.