Balanced phase shift transformer

• US 3,319,154 A
• Filed: 06/12/1963
• Issued: 05/09/1967
• Est. Priority Date: 06/13/1962
• Status: Expired due to Term

• Current Assignee: Thompson Rudge Peter
• Original Assignee: Thompson Rudge Peter
• Inventors: THOMPSON RUDGE PETER
• Application Number:
  US04/287,363
• Time in Patent Office: 1,427 Days
• US Class Current: 323/216
• CPC Class Codes: H01F 29/14 with variable magnetic bias amplitude modulation by means of variable impedance element H03C1/08 ; magnetic amplifiers H03F; circuits for automatic telephonic communication H04M3/00
• CPC Class Codes: H03D 3/10 in which the diodes are simultaneously conducting during the same half period of the signal, e.g. radio detector

Abstract

981,517. Transformers. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. June 12, 1963 [June 13, 1962], No. 23410/63. Heading H1T. A balanced phase-shift transformer has a primary winding 4 on a first former 1 and a centretapped secondary 7 on a second former 2, the centre tapping point being connected, preferably through a resistance, to a tertiary winding (having leads 11) on former 2 and the primary being connected in series with a further (coupling) winding via conductor 12, the further winding and the tertiary winding being wound together bifilarly to form the coil at 8. The secondary 7 may consist of two conductors wound bifilarly and connected in series. Movable cores 13 and 14 may be provided for varying the inductances of the primary and secondary windings respectively, while the coupling between the coupling winding and the secondary winding may be varied, without substantially affecting the inductance of the coupling winding, by a movable core 14. The transformer and the associated circuit illustrated may be enclosed in a metal screening container having a partition screening off winding 4 and holes giving access to the adjustable cores.

Claims

1. A TRANSFORMER COMPRISING FIRST AND SECOND SPACED APART SUPPORT MEMBERS, AN INPUT CIRCUIT COMPRISING FIRST AND SECOND SERIALLY CONNECTED WINDING PORTIONS WOUND ON SAID FIRST AND SECOND SUPPORT MEMBERS, RESPECTIVELY, AN OUTPUT WINDING HAVING A CENTER TAP WOUND ON SAID SECOND SUPPORT MEMBER SO AS TO BE MAGNETICALLY DECOUPLED FROM SAID FIRST WINDING PORTION, A TERTIARY WINDING WOUND ON SAID SECOND SUPPORT MEMBER SO AS TO FORM A BIFILAR WINDING WITH SAID SECOND WINDING PORTION, AND MEANS CONNECTING ONE END OF SAID TERTIARY WINDING TO THE CENTER TAP OF SAID OUTPUT WINDING.