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GB519496A - Improvements in and relating to pick-up control mechanism for automatic gramophones - Google Patents

Improvements in and relating to pick-up control mechanism for automatic gramophones

Info

Publication number
GB519496A
GB519496A GB32040/38A GB3204038A GB519496A GB 519496 A GB519496 A GB 519496A GB 32040/38 A GB32040/38 A GB 32040/38A GB 3204038 A GB3204038 A GB 3204038A GB 519496 A GB519496 A GB 519496A
Authority
GB
United Kingdom
Prior art keywords
lever
record
arm
pick
needle
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
GB32040/38A
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.)
Garrard Engineering & Manufacturing Comp
Original Assignee
Garrard Engineering & Manufacturing Comp
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 Garrard Engineering & Manufacturing Comp filed Critical Garrard Engineering & Manufacturing Comp
Publication of GB519496A publication Critical patent/GB519496A/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
    • G11B3/44—Styli, e.g. sapphire, diamond
    • G11B3/52—Arrangements permitting styli to yield under excessive pressure
    • 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
    • G11B3/085—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using automatic means
    • G11B3/08503—Control of drive of the head
    • G11B3/08506—Control of drive of the head for pivoting pick-up arms
    • G11B3/08509—Control of drive of the head for pivoting pick-up arms using mechanical detecting means
    • 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
    • G11B3/085—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using automatic means
    • G11B3/08535—Driving the head
    • G11B3/08538—Driving the head the head being driven by the same means as the record can
    • G11B3/08541—Driving the head the head being driven by the same means as the record can for pivoting pick-up arms
    • G11B3/08545—Driving the head the head being driven by the same means as the record can for pivoting pick-up arms driven by cams

Landscapes

  • A Measuring Device Byusing Mechanical Method (AREA)
  • Manipulator (AREA)

Abstract

519,496. Gramophone pick-up arm control mechanism. GARRARD ENGINEERING & MANUFACTURING CO., Ltd., and OFFEN, F. J. Nov. 4, 1938, No. 32040. [Class 40 (ii)] Relates to pick-up control mechanism for use in automatic gramophones having a feeler arm which is moved into and out of contact with the edge of a positioned record to detect its diameter. According to the invention, the return movement of the feeler arm is utilized to cause a pressure yieldably to be, applied to the pick-up arm to push the pick-up needle into the starting groove of the record after it has been deposited on the edge of the record. As shown in Fig. 1, the pick-up arm 1 is pivoted on an horizontal pivot 3 on an arm 4 on a vertical rotatable spindle 5 through which a rod 6 passes for lifting and lowering the pick-up. The diameter of the record is detected by a " feeler" arm 21 having a roller 22 at its free end which is brought against the edge of the record under the influence of a spring 28, Fig. 2, when a drum cam 26 co-operating with a lever 23 on the spindle 24 of the feeler arm 21 allows the inward movement of this lever. After this, a cam 19a allows a bell-crank 14 to be moved by a spring 20 to cause a lug 13 thereon to bear on a pin 16 on a lever 17 fast with the sleeve 5 and thereby swing the pick-up arm inward. This inward movement is limited by the abutment of a stop 36 on the lever 17 against a pin 30 or 31 on a lever 29 fast on the spindle of the feeler arm 21 according to the diameter of the record. The needle 2 is now just over the edge of the record and is lowered thereon by the co-operation of cam 12a with lever 7 pivoted at 8 and having a forked end 9 bearing on a collar 10 on the rod 6. During this lowering operation, horizontal displacement of the pick-up arm is prevented by a frictional grip due to the wedging of the pin 30 or 31 between the stop 36 and a rectangular stud 37 on the lever 17. After the needle has been lowered, drum cam 26 operates to withdraw the feeler arm 21 from the edge of the record, whereupon the pin 30 or 31 acts on lug 35 on a small lever 33 pivoted at 32 on the lever 17 and influenced by a spring 34 anchored to the lever 17. This spring thus transmits movement to the lever 17 causing the needle to be moved inward to engage the starting groove of the record. When the record is played, the needle follows the grooves and the lever 17 moves freely away from the reach of levers 14 and 29. This pick-up control mechanism may be used with the record-changing mechanism described in Specification 486,999 and with the record-delivery mechanism described in Specification 511,840.
GB32040/38A 1938-11-04 1938-11-04 Improvements in and relating to pick-up control mechanism for automatic gramophones Expired GB519496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB217002X 1938-11-04

Publications (1)

Publication Number Publication Date
GB519496A true GB519496A (en) 1940-03-28

Family

ID=10167348

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32040/38A Expired GB519496A (en) 1938-11-04 1938-11-04 Improvements in and relating to pick-up control mechanism for automatic gramophones

Country Status (4)

Country Link
US (1) US2263643A (en)
CH (1) CH217002A (en)
FR (1) FR860559A (en)
GB (1) GB519496A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616708A (en) * 1943-01-27 1952-11-04 Hartford Nat Bank & Trust Co System for the reproduction of phonograph records of different diameters
US2523629A (en) * 1943-03-19 1950-09-26 Olsson Gunnar Daniel Electric phonograph
US2457668A (en) * 1943-11-01 1948-12-28 Carl R Hart Automatic phonograph
US2546845A (en) * 1944-03-25 1951-03-27 Automatic Instr Company Selective record player
GB615993A (en) * 1945-04-18
CH250693A (en) * 1946-03-21 1947-09-15 Paillard & Cie Sae Device for controlling the movements of the pick-up arm of a talking machine.
US2563653A (en) * 1946-10-19 1951-08-07 Philco Corp Phonograph tone-arm indexing mechanism
US2673739A (en) * 1947-04-15 1954-03-30 Seeburg J P Corp Autoamtic phonograph
US2572684A (en) * 1948-04-10 1951-10-23 Associated Dev & Res Corp Automatic record changer
US2795429A (en) * 1950-05-11 1957-06-11 Admiral Corp Automatic record player

Also Published As

Publication number Publication date
CH217002A (en) 1941-09-30
FR860559A (en) 1941-01-18
US2263643A (en) 1941-11-25

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