Anti-Tamper Digital Clocks - An Overview



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The anti-tamper mortice bolt is designed to withstand sizeable amounts of impact and resist tampering, when remaining rapid and straightforward for employees to open up up.

30. An apparatus for detecting voltage tampering, comprising: signifies for providing a gradual-condition monotone signal throughout an Consider time period;

suggests for delaying the monotone signal to deliver a plurality of delayed monotone alerts obtaining discretely escalating delay periods in between a minimum hold off time as well as a maximum delay time and every of the plurality of delayed monotone signals getting possibly a just one or simply a zero logic price;

a next plurality of resettable hold off line segments that each hold off the next monotone signal to create a respective 2nd plurality of delayed monotone signals, whereby resettable delay line segments in between a resettable hold off line section connected to a minimum amount delay time and a resettable delay line section linked to a most hold off time are each associated with discretely escalating hold off times; and

An aspect of the present invention may perhaps reside in a method for detecting voltage tampering. In the tactic, a plurality of resettable delay line segments are provided. Resettable hold off line segments concerning a resettable delay line section connected to a least hold off time plus a resettable hold off line segment affiliated with a most hold off time are Every single associated with discretely expanding delay periods.

an evaluate circuit, triggered with the clock, that uses the plurality of delayed monotone signals to detect a clock fault.

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In-overall body layout enables clock to frequently be accessed for adjustment or battery enhance devoid of eradicating metal housing. Durable vandal resistant metallic housing, with detachable facial area plate secured by anti-tamper screws. Clock confront is shielded by outcomes resistance panel.

38. The equipment for detecting voltage tampering as outlined in claim 37, whereby the resettable delay line segments are reset for the duration of a reset time frame, wherein the reset time period is just before the Appraise time frame.

Very significant continuous point out frequency detection will depend on the hold off concerning the reset operators in the shortest delay line. The shorter some time needed to reset this delay line, the shorter the time basically allotted to reset the hold off line can be.

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In other a lot more in-depth aspects of the invention, each in the plurality of delayed monotone indicators could possibly be both a a single get more info or maybe a zero. The Examine circuit may determine regardless of whether the amount of kinds in the plurality of delayed monotone alerts differs from a drinking water degree amount by over a predetermined threshold.

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