Electricity: motive power systems – Motor-reversing – Field circuit control
Patent
1982-08-31
1985-03-19
Weldon, Ulysses
Electricity: motive power systems
Motor-reversing
Field circuit control
318305, 318345C, 318345G, H02K 2720
Patent
active
045061980
ABSTRACT:
A variable resistor (44) and conductors (36,38,42,46) for the speed control circuit are printed on a flexible insulating film (28) held against a flat heat sink (24) in an upright plane by a deflected conductive tab (34) protruding within an aperture (30) in the film pressed over the anode of a thyristor (26) soldered to the heat sink (24). The resistance (44) and collector (46) elements of the variable resistor are formed on a flap (32) which is folded over in a horizontal plane to present uniformly disposed surfaces for engagement by a trigger-carried wiping contactor (54). A chip capacitor (48) is soldered to conductive segments (36,38) of the printed circuit.
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Eaton Corporation
Grace C. H.
Vande Zande L. G.
Weldon Ulysses
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