Electricity: circuit makers and breakers – Electric switch details – Indicators
Patent
1987-08-21
1988-08-30
Luebke, Renee S.
Electricity: circuit makers and breakers
Electric switch details
Indicators
200339, H01H 916
Patent
active
047679000
ABSTRACT:
An electric apparatus is provided with a manual control switch with indication of the "on" and "off" positions, the case of said apparatus having on a front face a pivoting manual control switch capable of occupying two endmost "on" and "off" positions, said switch being mounted on a shaft provided in the case. The switch is pierced with two openings which, by a contrast between the colors of the switch and of the underlying shaft, stand out against the shaft, one of rectilinear shape indicating "on" position and the other of circular shape indicating the "off" position.
REFERENCES:
patent: 2192586 (1940-03-01), Getchell
patent: 2737557 (1956-03-01), Johnson
patent: 3309485 (1967-03-01), Gluck
patent: 3646958 (1972-03-01), Braas
patent: 4319107 (1982-03-01), Haskins
Beurdeley Dominique
Sauthier Lucien
Drucker William A.
La Telemecanique Electrique
Luebke Renee S.
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