Alarm device
First Claim
Patent Images
1. In a box comprising an enclosure having an access door, a device for providing an alarm when the access door is removed, comprising:
- an alarm;
trigger means, responsive to removal of the access door from the enclosure, for providing a trigger signal;
the trigger means allowing normal opening of the access door without activation of the alarm.
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Accused Products
Abstract
An alarm device for night deposit boxes consists of a housing with a tear gas or dye-releasing alarm in a housing mountable inside the deposit box. The housing includes electrical circuitry, which is connected by a flexible conductor cable to a trigger switch fitting into a magnetic keeper. The keeper is mechanically connected to the deposit box door assembly by a flexible cable. The circuitry includes a key-operated disabling switch and a light-emitting diode which is momentarily energized through a capacitor when the circuit is enabled.
19 Citations
9 Claims
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1. In a box comprising an enclosure having an access door, a device for providing an alarm when the access door is removed, comprising:
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an alarm; trigger means, responsive to removal of the access door from the enclosure, for providing a trigger signal; the trigger means allowing normal opening of the access door without activation of the alarm.
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2. In a box comprising an enclosure having an access door, an alarm device for providing an alarm when the access door is removed, comprising:
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a first trigger element comprising an electrical switch capable of assuming first and second states; a second trigger element comprising keeper means for holding the switch in its first state when the keeper means is in proximity to the switch; means for causing the switch to assume its second state when the switch is out of proximity to the keeper means; an alarm; electrical circuit means, connected to the switch, for activating the alarm in response to assumption by the switch of its second state; mechanical connecting means for connecting at least one of the trigger elements to the enclosure and the other trigger element to the access door; and said mechanical connecting means allows normal opening of the access door without separation of the electrical switch from the keeper means. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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Specification