Geometrical instruments
Patent
1977-05-25
1978-08-22
Lake, Roy
Geometrical instruments
339 75M, H01R 1354
Patent
active
041085230
ABSTRACT:
An improved electrified channel where the channel has four leads, one of which acts as a middle or neutral wire, while the remaining three leads act as phases of three distinct electric circuits. Two contactors are associated with the related connector, such as a stationery contactor acting as neutral, and a movable contactor for the selection of the three phases.
REFERENCES:
patent: 3015795 (1962-01-01), Meacham
patent: 3273103 (1966-09-01), Ericson
Desmond E. F.
Hill Alfred C.
ITT Industries Incorporated
Lake Roy
O'Halloran John T.
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