Communication system

• US 3,968,435 A
• Filed: 02/06/1975
• Issued: 07/06/1976
• Est. Priority Date: 02/06/1975
• Status: Expired due to Term

• Current Assignee: Harris A. Stover
• Original Assignee: Harris A. Stover
• Inventors: Stover, Harris A.
• Primary Examiner(s): Safourek, Benedict V.
• Application Number:
  US05/547,578
• Time in Patent Office: 516 Days
• Field of Search: 179/82, 325/16, 325/17, 325/18, 325/19, 325/20, 325/21, 325/152, 325/305, 325/367
• US Class Current: 455/82
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
• CPC Class Codes: H04B 5/48 Transceivers

Abstract

An electronic short range communication system which allows communication between two or more parties who are fairly close to each other and which allows communication between parties having the communication equipment without interfering with those who do not have communication equipment. The equipment has a definite range limit so as to prevent undesirable interference with other similar systems located beyond a reasonable distance. This system also permits communication from the nearest units of the system so as to override communication originating from more remote units.

Claims

1. A near field radiating energy integral receiver-transmitter communication system wherein said transmitter comprises a microphone, a first amplifier connected to the microphone, a modulator connected to said first amplifier, a low frequency oscillator connected to said modulator, a second amplifier connected to said oscillator, a radiating dipole connected to said second amplifier, said receiver comprising first and second receiving dipoles mounted noncoplanar relative to each other, a third amplifier connected to said first receiving dipole, a first demodulator connected to said third amplifier, a fourth amplifier connected to said second receiving dipole, a second demodulator connected to said fourth amplifier, a summing network connected to first and second demodulators, a fifth amplifier connected to said summing network, a loudspeaker connected to said fifth amplifier, a head gear, and said receiver, said transmitter and said radiating dipole and said first and second receiving dipoles mounted on said head gear, and said loudspeaker mounted near a user'"'"'s ear and said microphone mounted near a user'"'"'s mouth.

2. A near field radiant energy integral receiver-transmitter communication system according to claim 1 wherein said modulator frequency modulates said oscillator.

3. A near field radiant energy integral receiver-transmitter communication system according to claim 1 wherein said modulator phase modulates said oscillator.

4. A near field radiant energy communication system according to claim 1 including a third receiving dipole mounted noncoplanar with said first and second receiving dipoles on said head gear, a sixth amplifier connected to said third receiving dipole, a third demodulator connected to said sixth amplifier, and said third demodulator connected to said summing network.

5. A near field radiating energy integral receiver-transmitter communication system wherein said transmitter comprises a microphone, a first amplifier connected to the microphone, a modulator connected to said first amplifier, a low frequency oscillator connected to said modulator, a second amplifier connected to said oscillator, a radiating dipole connected to said second amplifier, said receiver comprising first and second receiving dipoles mounted noncoplanar relative to each other, a third amplifier connected to said first receiving dipole, a first phase shift means connected to said third amplifier, a fourth amplifier connected to said second receiving dipole, a second phase shift means connected to said fourth amplifier, a summing network connected to first and second phase shift means, a demodulator connected to said summing network, a fifth amplifier connected to said demodulator, a loudspeaker connected to said fifth amplifier, a head gear, and said receiver and transmitter and said radiating dipole and said first and second receiving dipoles mounted on said head gear, and said loudspeaker mounted near a user'"'"'s ear and said microphone mounted near a user'"'"'s mouth.