Communications device arranged to be worn in intimate contact with the body of a user

• US 3,983,483 A
• Filed: 03/10/1975
• Issued: 09/28/1976
• Est. Priority Date: 03/10/1975
• Status: Expired due to Term

• Current Assignee: Donald J. Pando
• Original Assignee: Donald J. Pando
• Inventors: Pando, Donald J.
• Primary Examiner(s): Safourek, Benedict V.
• Application Number:
  US05/557,112
• Time in Patent Office: 568 Days
• Field of Search: 179/1 UW, D56/4 B, 312/7 R, 325/16, 325/28, 325/105, 325/111, 325/118, 325/119, 325/352, 325/361, 206/328, 206/37, 2/129, 63/1 R, 63/3, 343/718
• US Class Current: 455/90.2
• CPC Class Codes: H01Q 1/273 Adaptation for carrying or wearing by persons or animals
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
• CPC Class Codes: H04B 1/04 Circuits
• CPC Class Codes: H04B 1/385 Transceivers carried on the body, e.g. in helmets
• CPC Class Codes: H04B 2001/3855 carried in a belt or harness
• CPC Class Codes: H04B 2001/3894 Waterproofing of transmission device

Abstract

A communications device arranged to be worn in intimate contact with the body of a user and without interference with bodily movements includes a radio transmitter and receiver for communicating with a remote station. The transmitter includes means arranged therewith and operative in conjunction with the body of the user for providing a relatively high transmitting frequency range. The device is miniaturized so as to provide predetermined transmitting and receiving circuit characteristics and is encapsulated so as to be essentially floatable, resilient and waterproof whereby it is rendered suitable outdoor activities such as sports and the like.

Claims

1. A communications device adapted to be worn in intimate contact with th body of a user comprising:

circuitry including a radio transmitter having a power supply and a microphone connected thereto, an amplifier stage including a first transistor and a first capacitor connected to the collector of the first transistor, an oscillator stage including a second transistor with the base thereof connected to the first capacitor, and a radio receiver having a power supply, an antenna and an earphone connected thereto;

a collar for housing the circuitry and including a strap for supporting the collar about the neck of the user so as to be in intimate contact therewith, said collar and circuitry housed within the collar arranged for permitting communication with a remote station while maintaining maximum body mobility;

said collar being generally oblong in shape and including a longitudinally convex face and a longitudinally concave face adjacent the neck, substantially parallel upper and lower edges and substantially parallel opposite ends separating the convex and concave faces, and the strap extending from the opposite ends and being integral with the concave face; and

means included in the transmitter and operative with the body of the user when the collar is worn in intimate contact with the neck for providing a predetermined transmission frequency range and including a grounded conductor for providing one plate of a second capacitor, with the body of the user being effectively connected to the collector of the second transistor for providing the other plate of the second capacitor.

2. A communications device as described by claim 1, wherein:

the collector of the second transistor radiates an electrical field; and

the body of the user is effectively connected to the collector through the electrical field.

3. A communications device as described by claim 1 including:

a tank circuit having a third capacitor and a coil connected in parallel relation; and

the tank circuit connected to the collector of the second transistor and connected to ground.

4. A communications device as described by claim 1, including:

a feedback capacitor connected to the collector and to the emitter of the second transistor.

5. A communications device as described by claim 1, wherein:

the emitter of the second transistor is connected to the transmitter power supply.

6. A communications device as described by claim 1, including:

a feedback resistor connected to the collector and to the base of th first transistor.

7. A communications device as described by claim 1, wherein:

the microphone is connected to the transmitter power supply, and is connected through a coupling capacitor to the base of the first transistor.

8. A communications device as described by claim 1, wherein the receiver includes:

a detector having a first transistor, with the collector thereof connected to the receiver power supply and the emitter connected to ground; and

a cascaded amplifier having second, third and fourth transistors, each of said transistors having the collector thereof connected to the receiver power supply and the emitter connected to ground.

9. A communications device as described by claim 8, wherein:

each of the second, third and fourth transistors has a feedback resistor connected to the collector and base thereof.

10. A communications device as described by claim 8, including:

a first capacitor for coupling the collector of the second transistor to the base of the third transistor and a second capacitor for coupling the collector of the third transistor to the base of the fourth transistor.

11. A communications device as described by claim 8, wherein:

the earphone is connected to the collector of the fourth transistor and is connected to the receiver power supply.

12. A communications device as described by claim 8, including:

a capacitor for coupling the collector of the second transistor to ground.

13. A communications device as described by claim 8, including circuitry for connecting the emitter of the first transistor to ground, said circuitry including:

a coil connected to said emitter, and a capacitor and a resistor connected in parallel relation to the first mentioned coil and connected to ground.

14. A communications device as described by claim 8 including circuitry for connecting the collector of the first transistor to the receiver power supply, said circuitry including:

a coil and a capacitor and connected in parallel arrangement to the collector, and a resistor connected to the parallel coil and capacitor arrangement and connected to the power supply; and

the antenna connected intermediate the collector of the first transistor and the parallel coil and capacitor arrangement, and connected through a coupling capacitor to a point intermediate the collector of the fourth transistor and the earphone.

15. A communications device as described by claim 14, including:

another capacitor connected intermediate the parallel coil and capacitor arrangement and the receiver power supply and connected to ground.

16. A communications device as described by claim 8, including:

a feedback capacitor connected to the collector and emitter of the first transistor.

17. A communications device as described by claim 8, including:

a capacitor for connecting the base of the first transistor to ground;

first and second resistors serially connected across the receiver power supply;

the base of the first transistor connected intermediate the first and second resistors; and

another capacitor connected in parallel with the first transistor.

18. A communications device adapted to be worn in intimate contact with the body of a user comprising:

circuitry including a radio transmitter having a power supply and a microphone connected thereto, an amplifier stage including a first transistor and a first capacitor connected to the collector of the first transistor, an oscillator stage including a second transistor with the base thereof connected to the first capacitor, and a radio receiver having a power supply, an antenna and an earphone connected thereto;

a housing for said circuitry and including means for supporting said housing in intimate contact with the body of a user; and

means included in the transmitter and operative with the body of the user when the housing is worn in intimate contact therewith for providing a predetermined frequency transmitting range and including a grounded conductor for providing one plate of a second capacitor, with the body of the user being effectively connected to the collector of the second transistor for providing the other plate of the second capacitor.