Microphone with channel selector and push-to-talk button interlock
US4147904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1978 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Mar 6, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microphone having a push to talk switch button extending through a slot in one side of the microphone and a channel selector switch knob extending through at least one other slot in the microphone. An interlocking structure, having at least one finger extending from an extension member on the push to talk switch button, engages and locks with a plurality of alternating teeth and spaces on the channel selector switch knob. During a transmit mode of operation, the push to talk switch, having the interlocking finger, engages in at least one space between two of the teeth of the channel selector switch knob to prevent rotary movement of the channel selector switch knob and switching of channels during the transmit mode of operation of the microphone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.