GB719643A - Improvements in and relating to sound reproducing apparatus - Google Patents

Improvements in and relating to sound reproducing apparatus

Info

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
Application number
GB233852A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAWRENCE VINCENT GUEST
PERCY VICTOR SHEPHARD
Birmingham Sound Reproducers Ltd
Original Assignee
LAWRENCE VINCENT GUEST
PERCY VICTOR SHEPHARD
Birmingham Sound Reproducers Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LAWRENCE VINCENT GUEST, PERCY VICTOR SHEPHARD, Birmingham Sound Reproducers Ltd filed Critical LAWRENCE VINCENT GUEST
Priority to GB233852A priority Critical patent/GB719643A/en
Priority to FR1074056D priority patent/FR1074056A/en
Priority to DEB23993A priority patent/DE1037164B/en
Publication of GB719643A publication Critical patent/GB719643A/en
Expired legal-status Critical Current

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

  • Mechanical Operated Clutches (AREA)
  • Automatic Disk Changers (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.
GB233852A 1952-01-28 1952-01-28 Improvements in and relating to sound reproducing apparatus Expired GB719643A (en)

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
FR1074056D FR1074056A (en) 1952-01-28 1953-01-28 Improvements made to sound reproduction systems
DEB23993A DE1037164B (en) 1952-01-28 1953-01-28 Control device for tonearms of record changers for playing records of different diameters

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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
DE1037164B (en) 1958-08-21
FR1074056A (en) 1954-10-01

Similar Documents

Publication Publication Date Title
GB719643A (en) Improvements in and relating to sound reproducing apparatus
GB1354318A (en) Phonograph pick-ups
GB1356816A (en) Phonograph
GB678705A (en) Improvements in phonographs
GB823749A (en) Improvements in and relating to sound reproducing apparatus
GB1100025A (en) Improvements in or relating to disc gramophones employing a pivoted pickup arm
GB613543A (en) Improvements relating to the mounting of sound reproducing or recording heads
SE7909299L (en) SAVING HOPPERS FOR VIDEO DISC PLAYERS
US2647754A (en) Reproducer mounting
GB741993A (en) Improvements in and relating to sound reproducing apparatus
GB1184978A (en) Pick-Up Arm for Miniature Record-Players
GB778979A (en) Improvements in devices for placing the pick-up arm needle in the correct initial playing position on a phonograph record
GB696075A (en) Improvements in or relating to devices for reproducing from selected portions of disc sound records
GB401751A (en) Improvements in or relating to sound reproducing devices
GB699397A (en) Improvements in or relating to convertible sound pick-up devices
GB599742A (en) Improvements in or relating to sound reproducing apparatus
GB254715A (en) Improvements in and relating to talking machines
GB653236A (en) Improvements in or relating to gramophones and the like
GB922239A (en) Improvements in cleaning appliances for gramophone records
GB292703A (en) Improvements in phonographs or gramophones
GB736039A (en) Improvements in and relating to gramophone and like apparatus
GB638481A (en) Improvements in electrical pick-ups for gramophones
GB912173A (en) Improvements in or relating to pick-up assemblies for gramophone record players
GB916804A (en) Improvements in and relating to gramophone pickups
GB641798A (en) Improvements in or relating to electric pick-ups for sound reproducing apparatus