GB459787A - Improvements relating to sound reproducing machines - Google Patents
Improvements relating to sound reproducing machinesInfo
- Publication number
- GB459787A GB459787A GB1971435A GB1971435A GB459787A GB 459787 A GB459787 A GB 459787A GB 1971435 A GB1971435 A GB 1971435A GB 1971435 A GB1971435 A GB 1971435A GB 459787 A GB459787 A GB 459787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- reproducer
- sound
- electromagnet
- worm
- 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
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/02—Arrangements of heads
- G11B3/08—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
Landscapes
- Treatment Of Biological Wastes In General (AREA)
Abstract
459,787. Sound-reproducing machines. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, and BESTER, G. C., 21, Alwyn Road, Bilton, Rugby. July 10, 1935, No. 19714. [Class 40 (ii)] In a back-spacing device for a sound-reproducing machine, particularly of the kind employing cylindrical wax records, repeated stepby-step backward movements of the reproducer are effected in response to a single closure of a switch, by means of an electromagnet having contacts operated by its armature as in an electric bell. In the construction shown, the U-shaped armature 4 of an electromagnet 2 is pivoted at 5, and is connected by a bar 8 to one of a pair of contacts 6. These are in circuit with the coil 2 and with a switch which is closed manually when back-spacing is required, intermittent movement of the armature then taking place. An arm (not shown) attached to the armature causes the reciprocating movement of the armature to effect in known manner backspacing of the reproducer, for example by rotating a worm-wheel on the carriage bearing the reproducer, which worm-wheel engages a feed-screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1971435A GB459787A (en) | 1935-07-10 | 1935-07-10 | Improvements relating to sound reproducing machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1971435A GB459787A (en) | 1935-07-10 | 1935-07-10 | Improvements relating to sound reproducing machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB459787A true GB459787A (en) | 1937-01-11 |
Family
ID=10133984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1971435A Expired GB459787A (en) | 1935-07-10 | 1935-07-10 | Improvements relating to sound reproducing machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB459787A (en) |
-
1935
- 1935-07-10 GB GB1971435A patent/GB459787A/en not_active Expired
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