GB353447A - - Google Patents
Info
- Publication number
- GB353447A GB353447A GB134230A GB134230A GB353447A GB 353447 A GB353447 A GB 353447A GB 134230 A GB134230 A GB 134230A GB 134230 A GB134230 A GB 134230A GB 353447 A GB353447 A GB 353447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- transformer
- coils
- shielded
- jersey
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
353,447. Transformers. HAZELTINE CORPORATION, 15, Exchange Place, Jersey City, New Jersey, U.S.A.-(Assignees of MacDonald, W. A. ; Little Neck, New York, U.S.A.) Jan. 14, 1930, No. 1342. Convention date, Feb. 15, 1929. [Class 38 (ii).] In a transformer for use with high-frequency amplifiers over two alternative ranges of bands of frequencies, the higher-frequency band is selected by the shunting of part of the transformer ; and the design is such as to secure a uniform amplification / frequency characteristic. The Figure shows the higher frequency primary L1 and long cylindrical secondary L3 are closely coupled with the reserved reaction coil N1; thin celluloid being used for insulation. The corresponding lower-frequency coils L2, L3, N2 are spaced away as indicated. The two groups of coils may be electrically shielded from one another, and 'the whole transformer may be shielded by a metallic can 4, shaped as shown. Suitable dimensions are given in the Specification.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US353447X | 1929-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB353447A true GB353447A (en) | 1931-07-14 |
Family
ID=21882088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB134230A Expired GB353447A (en) | 1929-02-15 | 1930-01-14 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB353447A (en) |
-
1930
- 1930-01-14 GB GB134230A patent/GB353447A/en not_active Expired
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