Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1974-09-11
1976-02-03
Scott, James R.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 4, 200 11B, 200 11DA, 200 14, H01H 340, H01H 1954
Patent
active
039366235
ABSTRACT:
A helical rotary switch having a helical coil formed of an insulating band like plate, a plurality of contact segments attached to said helical coil, a shaft for said helical coil rotatably supported by a pair of panels, a supporting member supported by said panels and supporting said helical coil between said pair of panels, and a sliding member with contact members engageable with said helical coil and said contact segments. The sliding member is mounted on said shaft such that when the shaft is rotated, said contact members of said sliding member successively contact the plurality of contact segments attached to said helical coil.
REFERENCES:
patent: 1606153 (1926-11-01), Douglas
patent: 1845406 (1932-02-01), Gebhard
patent: 2163644 (1939-06-01), Ware
patent: 2423054 (1947-06-01), Strickland, Jr.
patent: 2472230 (1949-06-01), Reinschmidt, Jr.
patent: 2874237 (1959-02-01), Shlesinger, Jr.
patent: 3025361 (1962-03-01), Hartsock et al.
patent: 3057014 (1962-10-01), Kirch
patent: 3088084 (1963-04-01), Lock
patent: 3156888 (1964-11-01), Blanco
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