Padlock with tamper-actuated audible and/or inaudible alarm
First Claim
1. A padlock with a tamper alarm, said padlock comprising:
- a body;
a shackle having a long leg and a short leg;
means mounting said shackle for reciprocal movement thereof relative to said body, between an extended, open position, in which said short shackle leg is outside the body, and a plurality of depressed position for the shackle;
means in said body for receiving each of said shackle legs;
means normally urging said shackle to its extended position;
latch means for engaging one of said shackle legs when the shackle is in a first of its depressed positions and said short leg is inside the lock body;
lock means operable to disengage said latch means from said one shackle leg;
alarm means actuable to emit an alarm signal;
and means, responsive to the depression of the shackle to another of its depressed positions more depressed than said first depressed position, for actuating said alarm means as a test of its operativeness.
1 Assignment
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Accused Products
Abstract
A padlock comprises a battery-powered, built-in alarm which operates when the padlock'"'"'s shackle is severed or forced open. The battery and alarm can be tested by opening the lock with a key, rotating the short leg of the shackle away from the lock body and then depressing the shackle, or optionally, by depressing the short leg. The alarm is turned on in response to the momentary closing of a switch when one shackle leg moves outwardly upon severance or forcible opening. The alarm may be an audible signal or an inaudible signal transmitted as a radio wave to a remote receiver at which an audible or visible signal is actuated. The audible signal generated at the lock escapes from the lock body through sound ports. Both audible and inaudible signals may be generated at the lock simultaneously.
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Citations
41 Claims
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1. A padlock with a tamper alarm, said padlock comprising:
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a body; a shackle having a long leg and a short leg; means mounting said shackle for reciprocal movement thereof relative to said body, between an extended, open position, in which said short shackle leg is outside the body, and a plurality of depressed position for the shackle; means in said body for receiving each of said shackle legs; means normally urging said shackle to its extended position; latch means for engaging one of said shackle legs when the shackle is in a first of its depressed positions and said short leg is inside the lock body; lock means operable to disengage said latch means from said one shackle leg; alarm means actuable to emit an alarm signal; and means, responsive to the depression of the shackle to another of its depressed positions more depressed than said first depressed position, for actuating said alarm means as a test of its operativeness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A padlock with a tamper alarm, said padlock comprising:
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a body; a shackle having a long leg and a short leg; means mounting said shackle for reciprocal movement thereof relative to said body, between an extended, open position, in which said short shackle leg is outside the body, and a depressed position for the shackle; means in said body for receiving each of said shackle legs; means normally urging said shackle to its extended position; latch means for engaging one of said shackle legs when the shackle is in its depressed position and said short leg is inside the shackle body; lock means operable to disengage said latch means from said one shackle leg; alarm means actuable to emit an alarm signal; a compartment in said body for containing a battery to provide energy for said alarm means; an entry to said compartment for gaining access to a battery therein; a removable cap for closing said entry; and removable fastener means, accessible solely through said receiving means for said short leg, for engaging said cap to prevent removal of the cap from said entry; said short leg comprising means for blocking access to said fastener means when said short leg is in its receiving means.
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16. A padlock with a tamper alarm, said padlock comprising;
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a body; a shackle having a long leg and a short leg; means mounting said shackle for reciprocal movement thereof relative to said body, between an extended, open position, in which said short shackle leg is outside the body, and a depressed position for the shackle; means in said body for receiving each of said shackle legs; means normally urging said shackle to its extended position; latch means for engaging one of said shackle legs when the shackle is in its depressed position and said short leg is inside the shackle body; lock means operable to disengage said latch means from said one shackle leg; audible alarm means actuable between an on condition for sounding an alarm and a normally off condition; means in said body for containing said alarm means; and means for actuating said audible alarm means to its on condition in response to a violation of said padlock; said receiving means for the other shackle leg communicating with said means for containing the alarm means and comprising means defining a sound port for said audible alarm means when said other shackle leg is outside of its receiving means. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A padlock with a tamper alarm, said padlock comprising:
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a lock body; a shackle having a long leg and a short leg; means mounting said shackle for reciprocal movement thereof relative to said body, between an extended open position in which said short shackle let is outside the body, and a depressed position for the shackle; means in said body for receiving each of said shackle legs; means normally urging said shackle to its extended position; latch means for engaging one of said shackle legs when the shackle is in its depressed position and said short leg is inside the shackle body; lock means operable to disengage said latch means from said one shackle leg; alarm means actuable between an on condition for emitting an alarm signal and an off condition; means for maintaining said alarm means in said off condition during authorized operation of the lock means; means for containing a battery; an electrical circuit including first and second switch means; means for maintaining said first switch means in an open position and said second switch means in a closed position when said shackle is in its depressed position and the short leg is inside the lock body; said electrical circuit comprising means for actuating said alarm means to its on condition and for maintaining the alarm means in its on condition while the first switch means is open, following the momentary closure of the first switch means while the second switch means remains closed; and means responsive to movement of the other shackle leg from its depressed to its extended position for monetarily closing and then opening said first switch means. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification