Contact device for a switch

Details Contact device for a switch Contact device for a switch

H - Electricity

01

H

306/330

H01H 1/22 (2006.01) H01H 71/50 (2006.01)

Patent

CA 1173878

A b s t r a c t A contact lever (1) has at one end a contact zone (3) for a stationary contact element (4) and is mounted at its other end on a pin (12) which upon tripping of the switch can move along a path (16) transversely of the contact lever (1). In a zone between the pin (12) and a stop for the contact lever (1), such stop being formed by a casing part (9), a compression spring (13) acts on the contact lever (1) to produce the contact pressure and to move the pin (12) upon tripping. The stop (9) has two projections or the like (14, 15) which extend towards the contact lever (1), one projection (14) being further from the pin (12) and nearer the lever (1) than the other projection (15). Consequently, at tripping the contact lever (1) pivots first around the projection (14) further from the moving pin (12), then around the projection (15) nearer the pin (12), with the result that, purely as a result of the shaping of the stop (9), a substantial contact- opening force is produced at the start of tripping and a long contact spacing is left at the end of the pivoting movement of the contact lever (1). (Fig. 1)

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