US2136798A - Transformer - Google Patents

Description

TRANSFORMER Filed Jan. 8, 1957 |Nv kNTOR Samuel HIS ATTORNEY CTI path will simultaneously decrease, and it is evident, therefore, that by changing the position ot the movable core member 2, the equivalent reactance of the secondary winding S may be varied by iniinitely small amounts to give any desired value between its maximum and minimum equivalent reactance.

Although I have herein shown and described only one form of transformers embodying my invention, it is understood that various changes and modiiications may be made therein Within the scope of the appended claim without departing from the spirit and scope of my invention:

Having thus described my invention, what I claim is:

A reactive transformer comprising a stationary core member provided'with a middle and two outer vertically extending parallel legs connected together at their lower ends by a backstrap, said middle leg being provided at its upper end with a curved surface and said two outer legs each being provided at its upper end with a plurality of vertically extending spaced parallel tongues the upper surfaces of which slope downwardly and inwardly, a movable core member pivotally supported intermediate its ends directly above said middle leg .for swinging movement toward one or the other of said outer legs, said movable core member being provided with a rounded depending portion which cooperates with the rounded upper end of said middle leg to provide a low reluctance connection between said middle leg and said movable core member in all positions of said movable core member, and said movable core member being further provided at each end with slots which cooperate with the tongues on the outer legs of said stationary core member, a primary winding on said middle leg, and a secondary winding on one of said outer legs.

SAMUEL M. LUCAS.

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