GB719643A - Improvements in and relating to sound reproducing apparatus - Google Patents
Improvements in and relating to sound reproducing apparatusInfo
- Publication number
- GB719643A GB719643A GB233852A GB233852A GB719643A GB 719643 A GB719643 A GB 719643A GB 233852 A GB233852 A GB 233852A GB 233852 A GB233852 A GB 233852A GB 719643 A GB719643 A GB 719643A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pick
- record
- arm
- spring
- during
- 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
- G11B3/10—Arranging, supporting, or driving of heads or of transducers relatively to record carriers
- G11B3/12—Supporting in balanced, counterbalanced or loaded operative position during transducing, e.g. loading in direction of traverse
- G11B3/121—By using mechanical means not provided for in G11B3/14, G11B3/20, e.g. using cams
- G11B3/122—Providing horizontal force, e.g. anti-skating
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/08—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records
- G11B17/12—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis
- G11B17/16—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis by mechanism in stationary centre post, e.g. with stepped post, using fingers on post
- G11B17/162—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis by mechanism in stationary centre post, e.g. with stepped post, using fingers on post with means for detecting the diameter of the record
- G11B17/165—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis by mechanism in stationary centre post, e.g. with stepped post, using fingers on post with means for detecting the diameter of the record with mechanical detecting means
Landscapes
- Automatic Disk Changers (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
719,643. Gramophones. BIRMINGHAM SOUND REPRODUCERS, Ltd., GUEST, L. V., and SHEPHARD, P. V. Jan. 12, 1953 [Jan. 28, 1952; July 16, 1952], Nos. 2338/52 and 18002 / 52. Class 40 (2). In an automatic gramophone the frictional forces tending to sweep the pick-up inwards at the start of a record is countered by the use of yieldable spring biasing means which acts in opposition the movement of the pick-up during the earlier part of its traverse across the record, but becomes progressively reduced until at the end of the. record the direction of the biasing may be reversed. The invention may be used in an automatic gramophone of the kind described in Specification 693,594. A spring 66 is mounted on a member 56 which is stationary during the playing of a record, the end of the spring resting in and acting on an arm 68 on a member 25 carrying the pick-up arm. As the member 25 rotates clockwise during the playing of the record, a dead centre is eventually passed, Fig. 4, after which the spring 66 assists the inward movement of the pick-up arm. A gravity biasing means may be employed in which a weight pivotally connected with the pick-up arm is drawn up an inclined surface during the tracking of the stylus, the inclined surface being made of varying gradient and finally terminating in a gradient of opposite slope.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB233852A GB719643A (en) | 1952-01-28 | 1952-01-28 | Improvements in and relating to sound reproducing apparatus |
DEB23993A DE1037164B (en) | 1952-01-28 | 1953-01-28 | Control device for tonearms of record changers for playing records of different diameters |
FR1074056D FR1074056A (en) | 1952-01-28 | 1953-01-28 | Improvements made to sound reproduction systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB233852A GB719643A (en) | 1952-01-28 | 1952-01-28 | Improvements in and relating to sound reproducing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB719643A true GB719643A (en) | 1954-12-08 |
Family
ID=9737783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB233852A Expired GB719643A (en) | 1952-01-28 | 1952-01-28 | Improvements in and relating to sound reproducing apparatus |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1037164B (en) |
FR (1) | FR1074056A (en) |
GB (1) | GB719643A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1091356B (en) * | 1957-05-15 | 1960-10-20 | Birmingham Sound Reproducers L | Control device for the insertion movement of the stylus in plate changers |
-
1952
- 1952-01-28 GB GB233852A patent/GB719643A/en not_active Expired
-
1953
- 1953-01-28 FR FR1074056D patent/FR1074056A/en not_active Expired
- 1953-01-28 DE DEB23993A patent/DE1037164B/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1091356B (en) * | 1957-05-15 | 1960-10-20 | Birmingham Sound Reproducers L | Control device for the insertion movement of the stylus in plate changers |
Also Published As
Publication number | Publication date |
---|---|
FR1074056A (en) | 1954-10-01 |
DE1037164B (en) | 1958-08-21 |
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