Step selector for a stepped transformer

Details Step selector for a stepped transformer Step selector for a stepped transformer

1989-08-03

1990-06-05

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

200 11TC, 200260, H01H 1958, H01H 150

Patent

active

049315994

ABSTRACT:
A step selector for a stepped transformer has an electrically insulating cylindrical wall provided with fixed contacts, e.g. at different levels and, for each contact level, a radial arm composed wholly of electrically insulating material is affixed to a cylindrical shaft rotatable about the axis of the cylinder and within the latter. The radial arm has a flange lying against the shaft and extending over substantially 120.degree. of an arc thereof. An inward projection on the flange engages a recess in the shaft and the flange is held against the shaft by at least one band of fibrous material impregnated with a self-hardening synthetic resin. The outer end of the arm carries a contact bridge slidable on a contact ring which nonrotatably surrounds the shaft and lies in the plane of the respective fixed contact which is engageable by the bridge.

REFERENCES:
patent: 2751447 (1956-06-01), Bartlett et al.
patent: 3045090 (1962-07-01), Wilson, Jr. et al.
patent: 3137778 (1964-06-01), Barr
patent: 3396428 (1968-08-01), Wilson, Jr.

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