Inductor devices – With temperature modifier – Heat exchanging surfaces
Patent
1988-01-15
1988-12-27
Kozma, Thomas J.
Inductor devices
With temperature modifier
Heat exchanging surfaces
336148, 336149, 338157, H01F 1506, H01F 2906
Patent
active
047943599
ABSTRACT:
A variable transformer comprising an annular core with a winding which at the end surface of the core is provided with a circular contact path to be connected with a current brush mounted on a rotor (7). The current brush consists of a contact roller journalled on a shaft pin (11) which from the rotor (7) is directed obliquely downwardly towards the end surface of the core and inwardly towards the axis thereof. The contact roller includes a double-curved contact path (17) for punctiform contact with the contact path (18) of the winding. The reactive pressure provided by said contact urges the contact roller upwardly along the shaft pin (11) which where secured to the rotor (7) is provided with a contact plate (14) that is in heat-conducting communication with the rotor (7). The contact plate (14) includes a plane circular surface (15) against which a correspondingly plane, circular surface (15') of the contact roller about the bore (12) thereof abuts. The contact roller is delimited by a conical surface the generatrix of which extends from the periphery of the circular surface (15') to the outer periphery of the contact path (17) of the roller. The rotor (7) is bowl-shaped and its top surface shape corresponds to the internal surface of the upper part of a housing for encasing the transformer.
REFERENCES:
patent: 1834896 (1931-12-01), Bruno
patent: 2000177 (1935-05-01), Kenney
patent: 2273245 (1942-02-01), Ander
Kozma Thomas J.
Transpower A/S
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