Telecommunications – Transmitter and receiver at same station – With a common signal processing stage
Patent
1987-03-02
1989-05-23
Griffin, Robert L.
Telecommunications
Transmitter and receiver at same station
With a common signal processing stage
455 90, 455351, 381183, H04B 138
Patent
active
048337269
ABSTRACT:
A helmet with two-way radio communication faculty including a cap-like outer shell made of hard and electrically insulating plastic material, a cap-like shock absorbing member arranged within the outer shell, an ear-pad member secured to one side edge of the outer shell, a transmitter unit arranged in a top recess formed in an outer surface of the shock absorbing member at its top portion, a receiver unit arranged on an inner surface of the ear-pad member, a battery unit arranged in a side recess formed in the outer surface of the shock absorbing member at its side which is opposite to a side on which the ear-pad member is secured to the outer shell, a transmitting dipole antenna made of a metal foil secured on an inner surface of the outer shell at its one side with the aid of an electrically insulating adhesive tape, and a receiving dipole antenna made of a metal foil secured on the inner surface of the outer shell at its other side with the aid of an electrically insulating adhesive tape.
REFERENCES:
patent: 4109105 (1978-08-01), Von Statten, Jr.
patent: 4130803 (1978-12-01), Thompson
patent: 4152553 (1979-05-01), White
patent: 4321433 (1982-03-01), King
patent: 4357711 (1982-11-01), Drefko et al.
patent: 4524461 (1985-06-01), Kostanty et al.
patent: 4607395 (1986-08-01), Sundahl
Katsukawa Hiroyuki
Kawaguchi Toshiyuki
Shinoda Katsuro
Tanaka Naoki
Griffin Robert L.
Kuntz Curtis
NGK Insulators Ltd.
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