US3727922A - Tone arm lifting device for automatic record player - Google Patents

Tone arm lifting device for automatic record player Download PDF

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Publication number
US3727922A
US3727922A US00213601A US3727922DA US3727922A US 3727922 A US3727922 A US 3727922A US 00213601 A US00213601 A US 00213601A US 3727922D A US3727922D A US 3727922DA US 3727922 A US3727922 A US 3727922A
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United States
Prior art keywords
piston
lifting
rod
tone arm
cylinder
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 - Lifetime
Application number
US00213601A
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English (en)
Inventor
T Igata
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Application granted granted Critical
Publication of US3727922A publication Critical patent/US3727922A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G11B3/09—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using manual means only

Definitions

  • the lifting device comprises a cylinder and a piston adapted to slide within the cylinder.
  • the piston has a smaller diameter portion in its upper portion, and is biased downwardly by a coil spring which tends to maintain it in its rest position.
  • the piston is provided with a notch in which an eccentric cam is mounted for up and down movement of the piston.
  • the cam is so arranged as to be rotatable by a cueing lever.
  • the piston is also provided with an axial bore in which a lifting rod is axially movable.
  • a lifting plate for the tone arm while the lower end thereof is carried on a cam plate for automatic operation.
  • An abutting member is fixed to the lifting rod below the lifting plate. Turning the cueing lever causes an angular displacement of the eccentric cam, which permits the piston to be thrusted up against the return spring. This results in the smaller diameter portion of the piston protuding upwardly from the cylinder and pushing the abutting member upwardly to raise the lifting rods,
  • an object of the present invention to provide a simple and effective tone arm lifting device for an automatic record player, in which the lifting mechanisms for both manual and automatic operation are integrated in a single assembly.
  • the tone arm lifting device has a cylinder and a piston slidably mounted within the cylinder for axial movement.
  • the piston is provided with a notch in which an eccentric cam is mounted for raising and lowering the piston, and the cam is rotated by a cueing lever.
  • the piston is biased downwardly by a return spring which tends to maintain it in its rest position.
  • the lifting device has a lifting mechanism for automatic operation, in which a lifting rod is slidably mounted in an axial bore in the piston body.
  • the lifting rod is movable axially by means of a cam plate, and has a lifting plate at its upper end and an abutment member fixed thereto below the lifting plate.
  • the tonearm lifting device of the present invention comprises a cylinder ll closed at lower end.
  • a cylinder cap 3 having an opening is screwed at 2 or otherwise attached on the cylinder 1 at its upper end.
  • a piston 4 including a smaller diameter portion 4a at its upper end portion and a larger diameter portion 4b at its lower end portion, is slidably mounted within the cylinder 1.
  • the piston 4 is slidable axially within the cylinder 1, and the smaller diameter portion 4athereof is adapted to protrude upwardly from the opening 5 of the cap 3 when the piston 4 is moved upwardly.
  • a return coil spring 6 surrounding the smaller diameter portion 4a of the piston.
  • the spring 6 serves to maintain the piston 4 in its rest position, that is, to bias the piston 4 downwardly.
  • a notch 7 in which an eccentric cam 9 is mounted.
  • the cam 9 is carried on the inner end of a rotatable shaft 8 which extends through the cylinder 1 and projects outwardly thereof.
  • a cueing lever 10 is fixed to the outer end of the shaft 8.
  • the piston body 4 is also provided with an axial bore 11 in which a lifting rod 12 is slidably mounted.
  • a lifting plate 15 On the top end of the lifting 'rod 12, there .is mounted a lifting plate 15 for the tone arm 14.
  • the lower end of the rod 12 is carried on a shiftable cam plate 16 which has higher portion and lower portion for automatic operation.
  • An abutment member 13 of a flange shape. is fixed to the lifting rod 12 below the'lifting plate 15.
  • cylinder 1 may be filled with a viscous oil, 'such as silicone grease, between the piston body 4 and the cylinder wall for damping purposes.
  • a viscous oil such as silicone grease
  • the cam 9 By rotating the cueing lever 10 in the opposite or counterclockwise direction, the cam 9 is again in contact with the notch 7 at its shorter radius portion, and the piston 4 moves downwardly slowly and softly under the action .of the return spring 5 and damping effect of the viscous oil, and is accompanied by a lowering of the lifting rod 12.
  • the tone a'rm may be lowered to its original rest position or onto the record placed on the turntable (not shown).
  • the lifting rod 12 since the lifting rod 12 is carried on the cam plate 16, it may be raised or lowered by the shifting of the cam plate 16 through any well known automatic'operating means. That is, when the higher portion of the cam plate 16 engages the lifting rod 12, the rod is raised so as to lift the tone arm to a raised position through the abutment member 13 and the lifting plate 15. Similarly, when the cam be accomplished independently of the manual operation.
  • the tone arm lifting device of the present invention is composed of a piston for manual operation and a lifting rod for automatic operation, both mounted in a single cylinder.
  • the piston is raised and lowered by manipulating a cueing lever through an eccentric cam, the raising movement of the piston being transmitted to the lifting plate.
  • the lifting rod 12 is caused to be raised and lowered by the shifting of a cam plate of the automatic operation mechanism.
  • a tone arm lifting device for use with an automatic record changer, having a tone arm, a turntable and a record changing mechanism mounted on a support, comprising a cylinder. Rigidly fited with respect to said support, a piston slidably mounted within the cylinder and having a notch in the peripheral portion thereof, an eccentric cam mounted within said notch for effecting upward and downward movement of the piston, means for manually rotating the eccentric cam, said piston having an axial bore therethrough, a lifting rod slidably mounted in said axial bore, extending above and below said cylinder cam means operated by said changing mechanism in engagement with the lower end of said rod for automatically effecting upward and downward movement of said rod, a lifting plate adapted for engagement with the tone arm mounted on the upper end of said lifting rod, and an abutment member fixed to said lifting rod below said lifting plate and above said piston, said abutment member being engageable by said piston when it is moved upwardly to thereby allow for manual raising and lowering of said tone arm.
  • a tone arm lifting device for use with an automatic record changer, having a tone arm, a turntable and a record changing mechanism mounted on a support, comprising a cylinder. Rigidly fited with respect to said support, a piston slidably mounted within said cylinder, manually operable means for effecting upward and downward movement of said piston, said piston having an axial bore therethrough, a lifting rod slidably mounted in said bore, extending above and below said cylinder means operated by said changing mechanism for effecting upward and downward movement of said rod, lifting means mounted on the upper end of said rod and being engageable with the tone arm when said rod is moved upwardly, and abutment means on said rod below said lifting means and above said piston which is engageable by said piston when it is moved upwardly to thereby allow for manual raising and lowering of said tone arm.

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  • Pistons, Piston Rings, And Cylinders (AREA)
  • Transmission Devices (AREA)
US00213601A 1970-12-29 1971-12-29 Tone arm lifting device for automatic record player Expired - Lifetime US3727922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13334170 1970-12-29

Publications (1)

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US3727922A true US3727922A (en) 1973-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00213601A Expired - Lifetime US3727922A (en) 1970-12-29 1971-12-29 Tone arm lifting device for automatic record player

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DE (1) DE2164875A1 (enrdf_load_html_response)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2348112A1 (de) * 1973-09-25 1975-04-17 Assmann Gmbh Vorrichtung und verfahren zum ruecksetzen des tonarms eines plattenspielers oder eines diktiergeraetes
US3973777A (en) * 1974-12-30 1976-08-10 Avnet, Inc. Cueing control
DE2611814A1 (de) * 1975-03-20 1976-09-30 Matsushita Electric Ind Co Ltd Hebeeinrichtung fuer einen tonarm
US4129305A (en) * 1976-02-27 1978-12-12 Pickering & Company, Inc. Phonograph turntable electro-thermal cueing control
US4195845A (en) * 1977-09-20 1980-04-01 Pioneer Electronic Corporation Turntable rotation controlling apparatus
DE3123818A1 (de) * 1980-06-16 1982-03-18 Victor Company Of Japan, Ltd., Yokohama, Kanagawa "tonarm-mechanismus fuer einen plattenspieler"
US4694449A (en) * 1984-07-06 1987-09-15 U.S. Philips Corporation Record player with a square, viscously damped pick-up arm lift rod
US10141012B1 (en) 2017-03-13 2018-11-27 Thomas G. Lavoie Manual to automatic turntable player conversion
EP3564956A4 (en) * 2016-12-28 2019-12-25 Panasonic Intellectual Property Management Co., Ltd. TONE ARM UNIT AND PLAYBACK
US10607634B1 (en) 2017-03-13 2020-03-31 Thomas G. Lavoie Light monitoring circuit for a manual to automatic turntable conversion
EP3905245A4 (en) * 2018-12-27 2022-03-16 Panasonic Intellectual Property Management Co., Ltd. TONE ARM DEVICE AND REPRODUCTION DEVICE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3127162A1 (de) * 1981-07-09 1983-01-20 Richard 8000 München Munk Plattenspielerchassis fuer einbau in kleinmoebel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385603A (en) * 1964-07-11 1968-05-28 Perpetuum Ebner Kg Resetting mechanism for phonograph turntables
US3414271A (en) * 1966-06-10 1968-12-03 Philips Corp Device for lifting and lowering a pickup head supported to be variable in height

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385603A (en) * 1964-07-11 1968-05-28 Perpetuum Ebner Kg Resetting mechanism for phonograph turntables
US3414271A (en) * 1966-06-10 1968-12-03 Philips Corp Device for lifting and lowering a pickup head supported to be variable in height

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2348112A1 (de) * 1973-09-25 1975-04-17 Assmann Gmbh Vorrichtung und verfahren zum ruecksetzen des tonarms eines plattenspielers oder eines diktiergeraetes
US3973777A (en) * 1974-12-30 1976-08-10 Avnet, Inc. Cueing control
DE2611814A1 (de) * 1975-03-20 1976-09-30 Matsushita Electric Ind Co Ltd Hebeeinrichtung fuer einen tonarm
US4129305A (en) * 1976-02-27 1978-12-12 Pickering & Company, Inc. Phonograph turntable electro-thermal cueing control
US4195845A (en) * 1977-09-20 1980-04-01 Pioneer Electronic Corporation Turntable rotation controlling apparatus
DE3123818A1 (de) * 1980-06-16 1982-03-18 Victor Company Of Japan, Ltd., Yokohama, Kanagawa "tonarm-mechanismus fuer einen plattenspieler"
US4694449A (en) * 1984-07-06 1987-09-15 U.S. Philips Corporation Record player with a square, viscously damped pick-up arm lift rod
EP3564956A4 (en) * 2016-12-28 2019-12-25 Panasonic Intellectual Property Management Co., Ltd. TONE ARM UNIT AND PLAYBACK
US10789974B2 (en) 2016-12-28 2020-09-29 Panasonic Intellectual Property Management Co., Ltd. Tonearm unit and playback device
US10141012B1 (en) 2017-03-13 2018-11-27 Thomas G. Lavoie Manual to automatic turntable player conversion
US10607634B1 (en) 2017-03-13 2020-03-31 Thomas G. Lavoie Light monitoring circuit for a manual to automatic turntable conversion
EP3905245A4 (en) * 2018-12-27 2022-03-16 Panasonic Intellectual Property Management Co., Ltd. TONE ARM DEVICE AND REPRODUCTION DEVICE

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Publication number Publication date
DE2164875A1 (enrdf_load_html_response) 1972-08-31

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