Battery detecting device for a radio pager

Details Battery detecting device for a radio pager Battery detecting device for a radio pager

1996-03-11

2000-08-15

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

340635, 320 2, 320 48, 429 97, G08B 2100

Patent

active

061043036

ABSTRACT:
In a device applicable to a pager or similar electronic apparatus for detecting a thin disk-like primary battery which feeds power to a load circuit, a secondary battery is provided which is complementary to the primary battery. A receiving portion receives the primary battery and has a first contact terminal for contacting the positive electrode side of the battery, a second contact terminal for contacting the negative electrode side of the battery at one end and connected to ground at the other end, and a third contact terminal contacting the negative electrode side of the battery at one end. When the primary battery is inserted in the receiving portion in a predetermined orientation, a detecting unit determines that the battery is present on the basis of the contact of the second and third contact terminals via the negative electrode side of the battery.

REFERENCES:
patent: 3930889 (1976-01-01), Ruggiero et al.
patent: 4628243 (1986-12-01), Hodgman et al.
patent: 4645325 (1987-02-01), Inoue et al.
patent: 5115182 (1992-05-01), Ehmke et al.
patent: 5182546 (1993-01-01), Shinbori et al.
patent: 5359318 (1994-10-01), Asai et al.
Patent Abstracts Of Japan, vol. 12, No. 447 (E-685), Nov. 24, 1988 & JP-A-63 174285 (Kyushu Hitachi Maxxell) Jul. 18, 1988.

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