Microphone with channel selector and push-to-talk button interlock

• US 4,147,904 A
• Filed: 03/06/1978
• Issued: 04/03/1979
• Est. Priority Date: 03/06/1978
• Status: Expired due to Term

• Current Assignee: Telex Communications Incorporated (Robert Bosch GmbH)
• Original Assignee: Telex Communications Incorporated (Robert Bosch GmbH)
• Inventors: Carpenter, Michael P., D'Amico, Paul M.
• Primary Examiner(s): Brown, Thomas W.
• Application Number:
  US05/883,372
• Time in Patent Office: 393 Days
• Field of Search: 179/178, 179/179, 325/15, 325/16, 325/111, 325/119
• US Class Current: 381/355
• CPC Class Codes: H04R 1/04 Structural association of microphone with electric circuitry therefor in deaf-aid sets H04R25/00
• CPC Class Codes: H04R 1/08 Mouthpieces; Microphones; Attachments therefor

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.

Claims

1. A microphone for use with two-way radio communications equipment having a push to talk function to activate equipment into the transmit mode of operation, said microphone comprising:

a. hollow housing means;

b. grill means positioned in an upper portion of said housing means and a microphone means positioned adjacent said grill means internal to said housing means;

c. spring actuated push to talk switch button means pivotally mounted in said housing means and having a portion extending through a slot in said housing means;

d. push to talk spring actuated plunger switch positioned internal to said housing means and having the plunger engaging against a portion of said push to talk switch button means;

e. channel selector means rotatably mounted in said housing means and having a portion extending through a slot is said housing means; and

,

f. interlocking means operably engagable between said push to talk switch button means and channel selector means whereby when an operator depresses said push to talk switch button means into said housing means, said interlocking means lockably engages during transit mode of operation when said push to talk switch button means is depressed thereby preventing the switching of the channels during the transmit mode of operation.

2. The microphone of claim 1 further comprising a light emitting diode readout display positioned in said housing means where the channel of operation is visually displayed.

3. The microphone of claim 1 further comprising two opposing slots in said housing means and said channel selector means having a portion extending through each of said opposing slots of said housing means.

4. The microphone of claim 1 further comprising a spring boss affixed to said push to talk switch button means and extending inwardly to said housing means, a post vertically positioned internal to said housing means and a spring compressed between said post and accepted by said spring boss means whereby said spring biases said push to talk switch button means against said housing means to prevent vibration of said switch button means.

5. The microphone of claim 1 further comprising pivot post means at a lower end of said push to talk switch button means and a receiving hole means in said housing means whereby said push to talk switch button means pivots in said housing means.

6. The microphone of claim 1 wherein said channel selector means comprises a round circular knob and a plurality of alternating teeth and spaces equally spaced about the circumference of said channel selector means, and wherein said interlocking means comprises an interlocking finger affixed to said push to talk switch button means and extending inwardly of said push to talk switch button means lockably engages said interlocking finger into one of said spaces and between said teeth of said channel selector means thereby preventing movement of said channel selector means and preventing the switching of channels during the transmit mode of operation.

7. The microphone of claim 1 wherein said channel selector means comprises a circular knob and a plurality of alternating teeth and spaces equally disposed about the circumference of said channel selector means, and wherein said interlocking means comprises two interlocking fingers and one indentation in between said interlocking fingers affixed to said push to talk switch button means and extending inwardly of said housing means, whereby depressing said push to talk switch button means lockably engages said interlocking fingers into two spaces and between said teeth of said channel selector means, thereby preventing movement of said channel selector means and preventing the switching of channels during the transmit mode of operation.

8. The microphone of claim 1 wherein said channel selector means comprises a circular knob and a plurality of alternating teeth and spaces equally disposed about the circumference of said channel selector means, and wherein said interlocking means comprises three interlocking fingers and two indentations in between said three interlocking fingers, said interlocking fingers affixed to said push to talk switch button means and extending inwardly of said housing means, whereby depressing said push to talk switch button means lockably engages said interlocking fingers into three spaces and between said teeth of said channel selector means, thereby preventing movement of said channel selector means and preventing the switching of channels during the transmit mode of operation.

9. The microphone of claim 8 wherein said plurality of alternating teeth and spaces of said channel selector means corresponds to an equal plurality of channels of operation.

10. The microphone of claim 9 wherein said plurality of alternating teeth and spaces equally disposed about the circumference of said channel selector means comprises forty teeth and forty spaces alternating with said forty teeth corresponding to forty channels of the Citizens Radio Service as designated by the Federal Communications Commission.