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Telephone Ring Indicator

IP.com Disclosure Number: IPCOM000078142D
Original Publication Date: 1972-Nov-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

McMains, LK: AUTHOR

Abstract

A telephone monitor provides visual indication that a telephone has rung during a persons absence, and thereby indicates that the person should check for a telephone message. The telephone monitor has particular applicability in an office environment where a large number of people are serviced by a single secretary. In such environment, there is usually a delay before the telephone message is delivered to the recipient. However, in this instance, the telephone monitor indicates that a check should be made for a message.

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Telephone Ring Indicator

A telephone monitor provides visual indication that a telephone has rung during a persons absence, and thereby indicates that the person should check for a telephone message. The telephone monitor has particular applicability in an office environment where a large number of people are serviced by a single secretary. In such environment, there is usually a delay before the telephone message is delivered to the recipient. However, in this instance, the telephone monitor indicates that a check should be made for a message.

The telephone monitor 5 includes normally open magnetic reed switch 10, located in close proximity to the magnetic coil in the telephone ringing circuit not shown. When the telephone, not shown, rings, reed switch 10 is closed and this causes silicon-controlled rectifier 15 to fire and thereby energize light-emitting diode 20. Light-emitting diode 20 remains on until the circuit is manually reset by operating push button 25.

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