Telecommunications – Transmitter and receiver at same station – Having particular housing or support of a transceiver
Patent
1990-04-30
1991-07-02
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
Having particular housing or support of a transceiver
455117, 455128, 361384, 379 58, 379428, H04B 103, H04M 102, H05K 720
Patent
active
050292366
ABSTRACT:
A radiotelephone apparatus employed as a so-called portable telephone or a car telephone includes an outer casing, a chassis base plate provided in the outer casing and mounting an electronic circuit section containing above all a heated element or elements, and a fan containing section containing a heat sink and a fan device connected in a heat conductive relation with the chassis base plate. The electronic circuit section and the fan containing section within the outer casing are isolated from each other by an air current interrupting device for air cooling heated electronic components while preventing dust and dirt in the air from flowing into portions in the casing other than the fan containing section. An air intake window is provided in the vicinity of mechanically operating portion of the apparatus for self cleaning dust and dirt sucked by the air flow through the normal telephone operation.
REFERENCES:
patent: 4513812 (1985-04-01), Papst et al.
patent: 4628992 (1986-12-01), Kennedy
patent: 4724400 (1988-02-01), Luettgenau
patent: 4860163 (1989-08-01), Sarath
patent: 4885488 (1989-12-01), Cox
Takao Nobutaka
Todo Akira
Yasuda Hiroshi
Yokoya Satoshi
Eisenzopf Reinhard J.
Kananen Ronald P.
Pham Chi H.
Sony Corporation
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