Level indicating device

Details Level indicating device Level indicating device

1986-02-18

1987-10-27

Birmiel, Howard A.

Communications: electrical

Condition responsive indicating system

Specific condition

33366, G01C 906

Patent

active

047033150

ABSTRACT:
A level for emitting an audio-visual signal to indicate when the level attains a vertical or an horizontal condition includes an electric power supply, an electric buzzer, an electric light emitting device, a first printed circuit board having a ring of electrically conductive material thereon, a second printed circuit board having an electrically conductive cross pattern printed thereon, and a pendulum having an electrically conducting resilient biasing member to maintain contact between the first and second boards.

REFERENCES:
patent: 3791042 (1974-02-01), Bell
patent: 4253242 (1981-03-01), McIverney
patent: 4557056 (1985-12-01), Kim et al.
patent: 4565010 (1986-01-01), Herman

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