GB642349A - Improvements in or relating to magnetic sound recorders - Google Patents
Improvements in or relating to magnetic sound recordersInfo
- Publication number
- GB642349A GB642349A GB741648A GB741648A GB642349A GB 642349 A GB642349 A GB 642349A GB 741648 A GB741648 A GB 741648A GB 741648 A GB741648 A GB 741648A GB 642349 A GB642349 A GB 642349A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- gap
- magnetic
- recording
- head
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
642,349. Magnetic sound recording. COLE, Ltd., E. K., and BURNARD, C. L. March 11, 1948, No. 7416. [Class 40 (ii)] In a magnetic wire or tape recorder head a magnetic core forms a closed magnetic circuit with two air gaps which divide the core into two sections each carrying a winding, one gap being the recording or reproducing gap and the other, which is wider, being the erasing gap. In Fig. 1 a magnetic recording wire C passes from a spool B over a pulley D on to a spool. A during recording, reproducing and erasing, and a single magnetic head E having a pair of windings (not shown) performs all three functions. This head, pivoted at J on an arm F pivoted at G, has two gaps G1, G2, Fig. 6, and may be positioned by a cam or lever arrangement (not shown), so that (a) gap G1 engages the wire as in Fig. 1 for recording or reproducing; (b) gap G2 engages the wire on the opposite side of the pulley for erasing ; (c) the head is entirely disengaged from the wire for rewinding. Lubricated felt pads H bear against the wire. Axial movement of pulley D and arm F to follow the winding of the wire on the spools and braking of the spools is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB741648A GB642349A (en) | 1948-03-11 | 1948-03-11 | Improvements in or relating to magnetic sound recorders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB741648A GB642349A (en) | 1948-03-11 | 1948-03-11 | Improvements in or relating to magnetic sound recorders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB642349A true GB642349A (en) | 1950-08-30 |
Family
ID=9832707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB741648A Expired GB642349A (en) | 1948-03-11 | 1948-03-11 | Improvements in or relating to magnetic sound recorders |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB642349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5121720Y1 (en) * | 1970-04-07 | 1976-06-05 |
-
1948
- 1948-03-11 GB GB741648A patent/GB642349A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5121720Y1 (en) * | 1970-04-07 | 1976-06-05 |
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