Booster and charger unit used for hand-held portable telephone a

Details Booster and charger unit used for hand-held portable telephone a Booster and charger unit used for hand-held portable telephone a

1987-11-16

1989-07-18

Ng, Jin F.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379437, 379451, H04M 1100, H04M 100

Patent

active

048500062

ABSTRACT:
A booster and charger unit for a hand-held portable (HHP) telephone capable of preventing a casing of the unit from being heated to an excessive temperature. The casing has thereinside a charging device for charging a battery, which is installed in the telephone, and a temperature sensor responsive to the temperature of the casing. When the temperature of the casing sensed by the sensor rises to a predetermined level, charging by the charging device is interrupted or the charging current thereof is reduced.

REFERENCES:
patent: 4027223 (1977-05-01), Renz
patent: 4234839 (1978-11-01), King et al.
patent: 4616171 (1986-10-01), Hernandez et al.
patent: 4634810 (1987-01-01), Grasel et al.
patent: 4639550 (1987-01-01), Yamagawa et al.
patent: 4647722 (1987-03-01), Nishida et al.
patent: 4656653 (1987-04-01), Oda et al.
patent: 4661992 (1987-04-01), Garay et al.
patent: 4703324 (1987-10-01), White
patent: 4737703 (1988-04-01), Koenck

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