US5548810A — Hands-free two-way radio communication system

Claim 1

Independent Claim 109 words

A radio allowing hands-free, two-way communication, comprising: a multiple channel transmitter/receiver, having one channel designated a primary communication channel, operable in a scan mode to scan multiple channels for communication signals; an interface operatively connected to said multiple channel transmitter/receiver; a hands-free microphone operatively connected to said multiple channel transmitter/receiver through said interface; a foot pedal actuator for keying said hands-free microphone to allow transmission of a message over said multiple channel transmitter/receiver; and means operative in response to said foot-pedal actuator for providing a control signal to said multiple channel transmitter/receiver resulting in said multiple channel transmitter/receiver switching to said primary communication channel for transmission of the message.

Claim 2

Dependent Claim 109 words

A radio allowing hands-free, two-way communication, comprising: a multiple channel transmitter/receiver, having one channel designated a primary communication channel, operable in a scan mode to scan multiple channels for communication signals; an interface operatively connected to said multiple channel transmitter/receiver; a hands-free microphone operatively connected to said multiple channel transmitter/receiver through said interface; a foot pedal actuator for keying said hands-free microphone to allow transmission of a message over said multiple channel transmitter/receiver; and means operative in response to said foot-pedal actuator for providing a control signal to said multiple channel transmitter/receiver resulting in said multiple channel transmitter/receiver switching to said primary communication channel for transmission of the message.

Claim 3

Dependent Claim 28 words

The radio as set forth in claim 1, further including a second microphone including a press-to-talk transmission switch operatively connected to said multiple channel transmitter/receiver through said interface.

Claim 4

Dependent Claim 18 words

The radio set forth in claim 2, wherein said foot pedal actuator is a double pole/double throw switch.

Claim 5

Dependent Claim 52 words

The radio set forth in claim 3, wherein said radio further includes a control signal line and a microphone transmission line, said double pole/double throw switch including a normally closed circuit in said control signal line and a normally open circuit connected to said microphone transmission line leading to said hands-free microphone.

Claim 6

Dependent Claim 38 words

The radio set forth in claim 4, further including a power input line to said hands-free microphone, a signal input line to said transmitter/receiver and a capacitor for coupling said power input line and said signal input line.

Claim 7

Dependent Claim 17 words

The radio set forth in claim 5, wherein said capacitor is rated at 0.01 μf, 50 V.

Claim 8

Dependent Claim 25 words

The radio set forth in claim 5, further including a resistor in said power input line to provide proper input voltage to said hands-free microphone.

Claim 9

Dependent Claim 24 words

The radio as set forth in claim 5, further including a fuse in said power input line to provide surge and short circuit protection.

Claim 10

Independent Claim 124 words

An apparatus for providing hands-free operating capability to a two-way radio including a multiple channel transmitter/receiver and press-to-talk microphone and having one channel designated a primary communication channel while also being operable in a scan mode to scan multiple channels for communication signals, said apparatus comprising: an interface operatively connected to said multiple channel transmitter/receiver; a hands-free microphone operatively connected to said multiple channel transmitter/receiver through said interface; a foot pedal actuator for keying said hands-free microphone to allow transmission of a message over said multiple channel transmitter/receiver; and means operative in response to said foot-pedal actuator for providing a control signal to said multiple channel transmitter/receiver resulting in said multiple channel transmitter/receiver switching to said primary communication channel for transmission of said message.

Claim 11

Independent Claim 124 words

An apparatus for providing hands-free operating capability to a two-way radio including a multiple channel transmitter/receiver and press-to-talk microphone and having one channel designated a primary communication channel while also being operable in a scan mode to scan multiple channels for communication signals, said apparatus comprising: an interface operatively connected to said multiple channel transmitter/receiver; a hands-free microphone operatively connected to said multiple channel transmitter/receiver through said interface; a foot pedal actuator for keying said hands-free microphone to allow transmission of a message over said multiple channel transmitter/receiver; and means operative in response to said foot-pedal actuator for providing a control signal to said multiple channel transmitter/receiver resulting in said multiple channel transmitter/receiver switching to said primary communication channel for transmission of said message.

Claim 12

Dependent Claim 19 words

The apparatus as set forth in claim 9 wherein said foot pedal actuator is a double pole/double throw switch.

Claim 13

Dependent Claim 49 words

The apparatus set forth in claim 10, further including a control signal line and a microphone transmission line said double pole/double throw switch having a normally closed circuit in said control signal line and a normally open circuit connected to said microphone transmission line leading to said hands-free microphone.

Claim 14

Dependent Claim 38 words

The apparatus set forth in claim 11, further including a power input line to said hands-free microphone, a signal input line to said transmitter/receiver and a capacitor for coupling said power input line and said signal input line.

Claim 15

Dependent Claim 17 words

The apparatus set forth in claim 12, wherein said capacitor is rated at 0.01 μf, 50 V.

Claim 16

Dependent Claim 25 words

The apparatus set forth in claim 12, further including a resistor in said power input line to provide proper input voltage to said hands-free microphone.

Claim 17

Dependent Claim 24 words

The apparatus as set forth in claim 12, further including a fuse in said power input line to provide surge and short circuit protection.

Claim 18

Dependent Claim 118 words

An interface for operatively connecting a hands-free microphone through a foot controlled actuator to a two-way radio including a multiple channel transmitter/receiver and press-to-talk microphone, the radio having one channel designated a primary communication channel while also being operable in a scan mode to scan multiple channels for communication signals, said interface comprising: a junction box including a shield line, a microphone transmission line, a signal input line and a control signal line; first means for operatively connecting said shield line, microphone transmission line, signal input line and control signal line to said transmitter/receiver and said press-to-talk microphone; and second means for operatively connecting said shield line, microphone transmission line and control signal line to said foot actuator.

Claim 19

Dependent Claim 118 words

An interface for operatively connecting a hands-free microphone through a foot controlled actuator to a two-way radio including a multiple channel transmitter/receiver and press-to-talk microphone, the radio having one channel designated a primary communication channel while also being operable in a scan mode to scan multiple channels for communication signals, said interface comprising: a junction box including a shield line, a microphone transmission line, a signal input line and a control signal line; first means for operatively connecting said shield line, microphone transmission line, signal input line and control signal line to said transmitter/receiver and said press-to-talk microphone; and second means for operatively connecting said shield line, microphone transmission line and control signal line to said foot actuator.

Claim 20

Dependent Claim 30 words

The interface as set forth in claim 16, wherein said interface further includes a power input line and means for operatively connecting said power input line to said hands-free microphone.

Claim 21

Dependent Claim 25 words

The interface set forth in claim 17, wherein said interface further includes a capacitor for coupling said power input line and said signal input line.

Claim 22

Dependent Claim 17 words

The interface set forth in claim 18, wherein said capacitor is rated at 0.01 μf, 50 V.

Claim 23

Dependent Claim 25 words

The interface set forth in claim 17, further including a resistor in said power input line to provide proper input voltage to said hands-free microphone.

Claim 24

Dependent Claim 24 words

The interface as set forth in claim 17, further including a fuse in said power input line to provide surge and short circuit protection.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1999-08-20	2000-02-19	2000-08-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2003-08-20	2004-02-19	2004-08-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2007-08-20	2008-02-19	2008-08-20	$7700.00	Window Closed / Lapsed

Hands-free two-way radio communication system

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