Electrical device with alternative battery power supplies

Details Electrical device with alternative battery power supplies Electrical device with alternative battery power supplies

1992-03-26

1994-07-19

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307150, H02J 700

Patent

active

053312120

ABSTRACT:
An electrical device characterized by alternative battery power supplies including an electrical circuit, a pre-installed first battery power supply disposed in a non-user-accessible portion of the device and a user-accessible compartment for receipt of a second battery power supply. The first supply is initially operatively connected to the circuit, and the presence of a second supply in the compartment operatively connects the second supply to the circuit to power the circuit regardless of the presence or absence of the first supply in the circuit. Preferably the first supply is mechanically operatively disconnected from the circuit when the second supply is in the compartment.

REFERENCES:
patent: 4620111 (1986-10-01), McArthur et al.
patent: 4666278 (1987-05-01), Uematsu et al.
patent: 4767358 (1988-08-01), Nullmeyer et al.
patent: 4863812 (1989-09-01), Ueda et al.
patent: 5034720 (1991-07-01), Bell et al.
patent: 5061579 (1991-10-01), Ishimoto

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