Browse Prior Art Database

PAGER MIS-USE ALERTING AND RECORDING DEVICE

IP.com Disclosure Number: IPCOM000006874D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-07
Document File: 1 page(s) / 51K

Publishing Venue

Motorola

Related People

Robert A. Marinelli: AUTHOR [+3]

Abstract

Credit Card form factor paging devices are subjected to undue stress while in the users' pockets or briefcase. With the advent of an alerting device a pager which is being bent or twisted will "beep" to inform the user to re-position the pager. This will prevent the user from damaging LCD's and other fragile components inside of the paging device.

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MO-LA INC. Technical Developments Volume 19 June 1993

PAGER MIS-USE ALERTING AND RECORDING DEVICE

by Robert A. Marinelli, John B. Miles and Henry Negron

  Credit Card form factor paging devices are subjected to undue stress while in the users' pockets or briefcase. With the advent of an alerting device a pager which is being bent or twisted will "beep" to inform the user to re-position the pager. This will prevent the user from damaging LCD's and other fragile components inside of the paging device.

  Conductive runners of a pre-determined size, shape, and cross section are etched into an existing printed cir- cuit board in strategic areas which are known to be high stress locations. The pattern for these etchings are to be

in the form of electrical resistance strain gages. An elec- trical circuit can be designed to measure the change in resistance and trigger the micro-processor to turn on the transducer if the unit is subjected to a torsional or bending force which has been caliirated into the device's processor as being excessive. Not only is it possible to alert the user of an impending failure ifthe device remains under undue stress but the micro-processor can store the number of times the device has been subjected to high levels of stress so the warranty centers can deter- mine whether or not to repair the device.

TYPICAL L.C.D

TYPICAL F'.C.B.

STRAIN GAUGE

48 0 Motorola. Inc. ,993

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