GB408294A - Improvements in or relating to arrangements for automatically controlling the playing of gramophone records - Google Patents

Improvements in or relating to arrangements for automatically controlling the playing of gramophone records

Info

Publication number
GB408294A
GB408294A GB1276332A GB1276332A GB408294A GB 408294 A GB408294 A GB 408294A GB 1276332 A GB1276332 A GB 1276332A GB 1276332 A GB1276332 A GB 1276332A GB 408294 A GB408294 A GB 408294A
Authority
GB
United Kingdom
Prior art keywords
arm
tone
record
plunger
guide
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
GB1276332A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1276332A priority Critical patent/GB408294A/en
Publication of GB408294A publication Critical patent/GB408294A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02Details

Landscapes

  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

408,294. Gramophones. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and JACOBY, H. C. E., c /o General Electric Co., Witton, Birmingham. July 4,1932, No. 12763. [Class 40 (ii).] Relates to an arrangement for automatically controlling the playing of disc gramophone records comprising means to raise the tone-arm when a record has been played, to return the tone-arm to the starting position, to lower the tone-arm, and to guide the tone-arm by the engagement of a part on the tone-arm with a fixed guide in such a manner that the tone-arm is first given a lateral deflection and then led vertically down to the correct position on the record. According to the invention, the continued movement of the tone-arm lowering means after the stylus has engaged the record is made to disengage the aforesaid part of the tone-arm from the guide ; and this guiding device can be adjusted or set for 10 or 12 inch records as desired. As shown, the guide is an upwardly extending slightly curved plate 34, Figs. 7 and 8, with two vertical slots 35, 36 each opening out into a V-shaped notch adjacent spring controlled pivoted flaps 37, 38, one or the other of which is put in operative position by a lever 46 according to the setting of the shaft 49 of a record feeding pillar 5 for 10 or 12 inch records. The part of the tone-arm adapted to engage the guide is a pin 30 projecting from an arm 29 on a shaft 27 journalled in the tone-arm 18. The shaft 27 is connected by a crank to one end of a lever 26, Fig. 1, pivoted inside the tone-arm at 25 and adapted to bear at its other end on a plunger 28, Fig. 3, which serves to raise and lower the tone-arm. The shaft 27 has also another crank 32 connected to a spring 33, which tends to hold the pin 30 away from the guide 34. The tone-arm is carried by a pillar 22 connected by a slotted crank 80 and a spring 82 to a lever 78 controlled by the face 62 of a cam 61. The plunger 28 is operated by a lever 71 pivoted at 72 and controlled by the periphery 63 of the cam 61. Another face of the cam controls the record feeding means. The automatic operation of the cam and mechanism associated therewith may be as described in Specifications 374,908 and 407,952. When a record has been played, the tone-arm is lifted by the plunger 28 and swung out by the lever 78, a fresh record is placed on the turntable and the tone-arm moved in over the starting groove. The finger 30, which was thrust forward by the action of the plunger 28 in lifting the tone-arm, deflected the spring flag 37 or 38 during the outward swing of the tone-arm but now abuts against the flag, which cannot yield in this direction ; and when the tone-arm is lowered by the plunger 28, the pin 30 strikes one of the sides of the V-shaped mouth of the slot 35 or 36 thereby giving a lateral deflection to the tone-arm, after which the pin rides down the slot 35 or 36 to position the stylus correctly in the starting groove of the record. The continued movement of the plunger 28 allows the spring 33 to withdraw the pin 30 from the guiding groove to permit the tone-arm to swing inward while the record is being played.
GB1276332A 1932-07-04 1932-07-04 Improvements in or relating to arrangements for automatically controlling the playing of gramophone records Expired GB408294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1276332A GB408294A (en) 1932-07-04 1932-07-04 Improvements in or relating to arrangements for automatically controlling the playing of gramophone records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1276332A GB408294A (en) 1932-07-04 1932-07-04 Improvements in or relating to arrangements for automatically controlling the playing of gramophone records

Publications (1)

Publication Number Publication Date
GB408294A true GB408294A (en) 1934-04-04

Family

ID=10010673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1276332A Expired GB408294A (en) 1932-07-04 1932-07-04 Improvements in or relating to arrangements for automatically controlling the playing of gramophone records

Country Status (1)

Country Link
GB (1) GB408294A (en)

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