Electric switch

High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Contact structure

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Details

335201, 218123, 218 30, H01H 3302, H01H 3308, H01H 930

Patent

active

060255684

ABSTRACT:
An electric switch (1), in particular for electric hand tools having an electric motor operated by means of direct current. The switch (1) possesses a contact system (9) consisting of a fixed contact (10) and of a switching contact (11), an actuating member (3) for triggering a switching operation between an "off" and an "on" position of the contact system (9) acting on the switching contact (11). The contact system (9) is assigned means (18), consisting of a shield (19), for extinguishing an arc generated between the fixed contact (10) and the switching contact (11) during the switching operation. The shield (19) can be moved together with the switching contact (11) in a coupled manner, during the operation to switch the switching contact (11) from the "on" to the "off" position the shield (19) being moved into the region located between the fixed and switching contacts (10, 11). Conversely, during the operation to switch the switching contact (11) from the "off" to the "on" position, the shield (19) is moved out of the region located between the fixed and switching contacts (10, 11), so that the switching contact (11) can be laid onto the fixed contact (10).

REFERENCES:
patent: 1898128 (1933-02-01), Jackson et al.
patent: 2458804 (1949-01-01), Sundt
patent: 2753413 (1956-07-01), Anderson
patent: 4594489 (1986-06-01), Gengenbach et al.
patent: 4659887 (1987-04-01), Belbel et al.

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