Process and design for producing inside coils

US5715591A · kind A · utility

Assignee

• Grundig AG · DE

Inventors

• Friedrich Karl Albrecht · Schorndorf, DE
• Otto Weiss · Calgary, CA

Key dates

• Filing date: Mar 4, 1996
• Grant date: Feb 10, 1998
• Expiry date: Mar 4, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49071
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

It is well known that induction regulators are used in transmitting signals in head drum structures in video devices or equipment for digital recording and playback of signals. Since each head on the head wheel requires its own induction regulator, or transformer for short, there can be a relatively large number of transformers. This plus the fact that head drum units are becoming increasing smaller, and transmission frequencies increasingly higher, leads to very high demands for precision on the part of the transformer. This applies both to the ferrite rings and to the coils of the transformer. A device is proposed with which coils can be produced with high precision in the inner groove of the ferrite ring.