Battery removal indicator

Details Battery removal indicator Battery removal indicator

Filed on

1989-01-30

Date issued

1989-11-14

Examiner

Swann, III, Glen R.

Patent Class

Communications: electrical

SubClass

Condition responsive indicating system

SubSubClass

Specified housing

Other Related Categories

116303, 340568, 340628, 340691, G08B 2100

Type

Patent

Status

active

Patent number

048810630

Description

ABSTRACT:
The present invention relates to a battery removal indicator for battery operated units such as smoke detectors or fire alarms. The battery removal indicator is formed by a spring loaded member which is retained in a retracted position when a battery is present and which moves to a deployed position when the battery is absent. In its deployed position, the member prevents a cover of the unit from being engaged by a latch mechanism for securing the cover in a closed position. The unlatched cover acts as a first visual indication that the battery is not present. The member is also marked with warning indicia on one or more surfaces so as to provide a second visual indication that the battery is absent.

REFERENCES:
patent: 4228428 (1980-10-01), Niedermeyer
General Electric Home Sentry Smoke Alarm-Pub. No. #000861, 1976.

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