Inductor devices – Combined – With connector
Patent
1976-01-27
1976-12-07
Kozma, Thomas J.
Inductor devices
Combined
With connector
336146, 339 31R, H01F 2700
Patent
active
039965465
ABSTRACT:
A dual-voltage electric plug comprising an insulating hollow casing having an opening, a terminal fitting within the casing, said fitting including four conducting terminal pins extending towards the opening in the casing, which four terminal pins are respectively connected or connectable to four conductors constituting two pairs across which are respectively connected two primary windings of a transformer having a common secondary winding, and an insulating insert insertable into the opening in the casing in either one of two differing orientations, said insert carrying live and neutral projecting socket pins for cooperation with a mains voltage socket, said insert also carrying connecting means located within the casing when the insert is in its inserted condition and for completing differing circuit paths through the socket pins and the terminal pins in the two respective orientations of the inserted insert, whereby in one orientation the two primary windings will be connected in series to provide a predetermined output secondary voltage derived from a mains voltage of one value and in the other orientation the two primary windings will be connected in parallel to provide the same predetermined output secondary voltage derived from a mains voltage of a second value.
REFERENCES:
patent: 2450657 (1948-10-01), Guernsey
Kozma Thomas J.
The Gillette Company
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