Electricity: circuit makers and breakers – Multiple circuit control – Sequential operations
Patent
1997-02-25
1998-07-21
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Sequential operations
200 16C, 200 16D, H01H 1504
Patent
active
057837856
ABSTRACT:
A two-step operation switch device, in which intervals between a common fixed contact and other fixed contacts juxtaposed to the common fixed contact are kept as wide as possible so that insulating properties between the contacts are maintained in a normal state. The common fixed contact 11, first fixed contacts 12, 13, and second fixed contacts 14, 15 are disposed on an insulating plate 1. A movable contacting piece 2 has a first contacting piece 21 slid in a first region, in which the common fixed contact 11 and the first fixed contacts 12 and 13 are juxtaposed, and a second contacting piece 22 slid in a second region, in which the common fixed contact 11 and the second fixed contacts 14 and 15 are juxtaposed. Intervals W2 between the common fixed contact 11 and the second fixed contacts 14 and 15 in the second region Z2 are wider than intervals between the common fixed contact 11 and the first fixed contacts 12 and 13 in the first region Z1. A width W4 of the common fixed contact 11 on the second region Z2 side is greater than a width W3 thereof on the first region Z1 side so that the movable contacting piece 2 is connected with the first fixed contacts 12 and 13 in the first region Z1 and the common fixed contact 11 in the second region Z2, when the movable contacting piece 2 is at first positions MU and MD.
REFERENCES:
patent: 4866221 (1989-09-01), Obermann et al.
patent: 5258593 (1993-11-01), Hayakawa
patent: 5378863 (1995-01-01), Sekita
patent: 5414231 (1995-05-01), Sato et al.
patent: 5647478 (1997-07-01), Hirai
Niles Parts Co., Ltd.
Scott J. R.
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