Browse Prior Art Database

VIBRATING TRANSMIT SWITCH FOR PORTABLE RADIOS

IP.com Disclosure Number: IPCOM000007481D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2002-Mar-29
Document File: 1 page(s) / 42K

Publishing Venue

Motorola

Related People

John Waterhouse: AUTHOR [+2]

Abstract

A useli method of giving the operator of a port- able or mobile radio feedback on the radio's state would be to make the PTT switch, or the whole body ofthe radio or microphone, vibrate. This could be done by using the same type of vibrating motor that are used in vibrapage pagers. They are small and typically draw only 1-5 mA.

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8 M-ROLA Technical Developments

VIBRATING TRANSMIT SWITCH FOR PORTABLE RADIOS

by John Waterhouse and Stephen Harris

  A useli method of giving the operator of a port- able or mobile radio feedback on the radio's state would be to make the PTT switch, or the whole body ofthe radio or microphone, vibrate. This could be done by using the same type of vibrating motor that are used in vibrapage pagers. They are small and typically draw only 1-5 mA.

There are numerous applications for this warn- ing method:

1) To warn that the carrier squelch has detected chan- nel activity when the PTT pressed. This should deter the operator l?om speaking. The PM inhibit can be made compulsory in some systems. This should stop the requirement to press the monitor button before transmitting.

2) In a secure radio to warn the operator if his is transmitting in secure or clear (as selected). This alarm need not be transmitted via microphone pick-up.

3) Warning oflow battery.

4) Warning of key loss (in secure radios) or synthesizer out oflock.

5) The quiet nature ofthis system makes it well suited for giving warnings in covert applications.

6) The vibrator can also act as a conventional sig- nalling alert, in a similar manner to pagers.

0 Mmorola. Inc. 1995 137 July 1995

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