Hand-held microphone for transceiver

• US 4,199,721 A
• Filed: 10/19/1977
• Issued: 04/22/1980
• Est. Priority Date: 10/19/1977
• Status: Expired due to Term

• Current Assignee: Nihon Atsudenki Kabushiki Kaisha
• Original Assignee: Nihon Atsudenki Kabushiki Kaisha
• Inventors: Fujino, Shoji, Ozaki, Yukio, Suzuki, Kentaro, Ono, Atsushi
• Primary Examiner(s): Griffin, Robert L.
• Assistant Examiner(s): Masinick, Michael A.
• Application Number:
  US05/843,668
• Time in Patent Office: 916 Days
• Field of Search: 325/15, 325/16, 325/25, 179/179
• US Class Current: 455/77
• CPC Class Codes: H04B 1/3822 specially adapted for use in vehicles H04B1/3827 takes precedence

Abstract

Hand-held microphone consisting of a housing which is of such a size that said housing can be easily held by one hand, said housing including a rotary switch means which generates a digital coded signal for individually selecting one of preset frequencies and a digital coded signal for making a digital display of the channel member corresponding to the selected frequency; a channel number display means which is driven by the digital coded signal from said rotary switch means and makes a digital display of the channel number corresponding to the selected frequency; an electroacoustic transducer means; a transmit/receive switch means which switches between transmitting condition and receiving condition of a transceiver and at the same time actuates said electroacoustic transducer means; and a gain control means which varies the amplification degree of the audio amplifier and/or the radio frequency amplifier in the transceiver, whereby transmission or reception can be made by the operator who handles the transceiver in one hand.

Claims

1. A hand-held microphone unit for controlling a transceiver over a multi-conductor cable electrically connected therebetween, the microphone unit comprising:

a housing small enough to grip by one hand;

a rotary switch means installed in said housing yet operable from outside the housing, the switch means comprising a pair of rotary switches, a first of the pair of rotary switches generating a first digital coded signal for selecting one of a set of preset frequencies within the transceiver, a second of the pair of rotary switches generating a second digital coded signal for making a digital display of the channel number corresponding to the selected frequency;

a channel number display means installed in said housing, with the display surface exposed outside, being driven by the second digital coded signal from the second of the pair of rotary switches for displaying the channel number corresponding to the selected frequency;

an electroacoustic transducer means installed in said housing for converting any impressed pattern of sound into a corresponding electrical signal;

a transmit/receive switch means installed in said housing for switching between the transmitting condition and the receiving condition and at the same time actuating said electroacoustic transducer means; and

a gain control means installed in said housing for varying the amplification degree of at least one amplifier in the transceiver.

2. Hand-held microphone of claim 1 further comprising a squelch control means for adjusting the squelch level of the transceiver, said squelch control means together with the gain control means being installed partially projecting out of the housing at a convenient position for operation.

3. Hand-held microphone of claim 1, wherein the operating knob of the rotary switch means and the knob of the transmit/receive switch means are partly projecting out of the housing so that they can be easily operated, the respective projecting directions of said knobs being opposite to each other relative to the housing.

4. Hand-held microphone of claim 1, wherein between the second rotary switch and the channel number display means there is connected a voltage control means to adjust the brightness of display.

5. Hand-held microphone of claim 1, wherein the transmit/receive switch means comprises a switch each contact of which is staggered with respect to a mating contact such that the electroacoustic transducer means functions as a microphone after the transceiver is brought to transmitting condition and the transceiver returns to receiving condition after the electroacoustic transducer means ceases to function as a microphone.

6. Hand-held microphone of claim 1, wherein the electroacoustic transducer means functions both as a microphone and as a speaker.

7. Hand-held microphone of claim 1, wherein the electroacoustic transducer means consists of separate units of a microphone and a speaker and is installed in the housing.

8. Hand-held microphone of claim 1, wherein the electroacoustic transducer means consists of a microphone unit and a speaker in separate units, the microphone unit being installed in the housing and the speaker being set separate from the housing.

9. Hand-held microphone of claim 1, wherein the housing is equipped with a transmit/receive level display means for assuring the transmitting or receiving condition of the transceiver.

10. Hand-held microphone of claim 9, wherein the transmit/receive level display means consists of LED.

11. Hand-held microphone of claim 9, wherein the transmit/receive level display means is a moving coil type meter.

12. A transceiver comprising:

a transceiver case;

a receiving circuit installed within the transceiver case for receiving one of a plurality of preset radio frequency signals when the transceiver is in receiving condition and converting the received radio frequency signal into an electrical output of acoustic frequency;

a transmitting circuit installed within the transceiver case for converting an electrical signal of acoustic frequency input into a radio signal to be transmitted at a selected preset frequency;

a PLL frequency synthesizer installed within the transceiver case and operated by a digital coded signal so as to synthesize the select preset frequency and serve as local oscillator when the transceiver is in receiving condition;

a separate housing easily held by one hand connected to the transceiver case and components therein by a multiconducter cable;

a frequency selecting means installed within the housing for generating a digital coded signal which individually selects preset frequencies, the frequency selecting means comprising conductive and nonconductive parts which selectively contact with terminals for generating the digital coded signals;

a channel number display means installed within the housing with its display surface exposed outside of the housing, the display means controlled by the frequency selecting means for displaying the channel selected by the frequency selecting means;

an electroacoustic means installed in the housing for converting any impressed pattern of sound into a corresponding electrical signal;

a transmit/receiving switch means installed in the housing for switching the transceiver between transmitting condition and receiving condition and for actuating the electroacoustic means; and

a gain control means installed in the housing for varying the amplification of at least one amplifier within the receiving circuit of the transceiver.

13. A control unit for a transceiver comprising:

a housing as small as to be held by one hand, the housing being electrically connected with the transceiver over a multi-conductor cable so that the transceiver may be remote-controlled;

a frequency selecting means installed within the housing for generating a digital coded signal which individually selects preset frequencies, the frequency selecting means comprising conductive and non-conductive parts which selectively contact with terminals for generating the digital coded signals and controlling a channel number display means;

a channel number display means installed within the housing with its surface exposed outside of the housing and controlled by the frequency selecting means for displaying the channel corresponding to the frequency selected by the frequency selecting means;

an electroacoustic means which is installed within the housing for converting any impressed pattern of sound into a corresponding electrical signal;

a transmit/receiving switch means which is installed within the housing for switching the transceiver between transmitting condition and receiving condition and for actuating the electroacoustic means; and

a gain control means which is installed within the housing for varying amplification degree of at least one amplifier within the transceiver.