Browse Prior Art Database

File Security Alarm

IP.com Disclosure Number: IPCOM000084973D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Alstad, JK: AUTHOR [+2]

Abstract

An audible alarm indicates that a file cabinet has not been locked at the end of the day or, if locked, that it has been unlocked outside office hours.

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File Security Alarm

An audible alarm indicates that a file cabinet has not been locked at the end of the day or, if locked, that it has been unlocked outside office hours.

When a bar used to lock the file cabinet in Fig. 1 is put in place, whether secured by a lock or not, switch S2 is opened. A timer closes switch S1 only outside working hours. Thus, if the bar is disturbed outside working hours sufficiently to close switch S2, the battery will cause the alarm to sound. If the bar is not in place at the end of the day, when switch S1 closes, the alarm will also sound.

A power failure releases a normally operated relay to close relay contact B and open relay contact A. Contact B will sound the alarm and continue to do so, even after the power is restored, until the relay is reactivated by pushing the reset button. The timer should then be adjusted to compensate for the power failure.

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