US3105691A - Pick-up for use with record players - Google Patents

Pick-up for use with record players Download PDF

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Publication number
US3105691A
US3105691A US7572A US757260A US3105691A US 3105691 A US3105691 A US 3105691A US 7572 A US7572 A US 7572A US 757260 A US757260 A US 757260A US 3105691 A US3105691 A US 3105691A
Authority
US
United States
Prior art keywords
pick
unit
housing
stops
record
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
US7572A
Other languages
English (en)
Inventor
Dragt Jan Cornelis Willem
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3105691A publication Critical patent/US3105691A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R17/06—Gramophone pick-ups using a stylus; Recorders using a stylus comprising two or more styli or transducers

Definitions

  • the invention relates to a pick-up for use in a record player, this pick-up comprising a pick-up unit housed in an envelope with two diametrically opposite needles, which can be moved into the working position by turning them about the longitudinal axis of the unit in one direction and in the other direction respectively.
  • the invention is based on the recognition of the fact that the adjustment of the needle in its working position with stereophonic record players is extremely critical, since the cross-talk factor from one sound channel to the other becomes considerably more unfavourable even when the pick-up occupies only a slightly oblique position. With a deviation of not more than 2", for example, this factor amounts already to 2.
  • the invention consists in that the turn of the pick-up unit is limited on both sides by a stop, of which stops at least one is accurately adjustable. less important for the other stop, if it is associated with the working position of a needle not used for stereophonic reproduction.
  • the accompanying drawing shows a longitudinal sectional view of one embodiment of a pick-up according to the invention.
  • a pick-up unit 2 In a housing 1 of light material is arranged a pick-up unit 2 so as to be rotatable on gudgeons 3, which fit in round openings of a frame 4, secured in the housing.
  • the pick-up unit comprises two diametrically opposite needles 5 and 6, of which the latter is to be used for stereophonic reproduction and must therefore be movable This adjustability is' into its working position with great accuracy and be held therein. This position is shown in the FIGURE.
  • the unit 2 can be turned about the gudgeons 3 with "ice the aid of a tag 7, which is at right angles to the plane of the drawing and which projects, as shown in the drawing, downwardly below the housing 1, and which is secured to the unit by a rivet 8.
  • this additional turn is prevented by a screw-bolt 12, located below the unit 2, as shown in the drawing; this bolt has a fine screwthread. The point of this bolt abuts against the stationary stop 13 of the frame 4- as soon as the needle 6 arrives at its correct position. Small deviations from this position may always be corrected by means of the bolt 12.
  • a phonograph cartridge comprising a housing, a pick-up unit rotatably mounted in said housing and .having two spaced, alternately operating needles therein, said pick-up unit being rotatable about its longitudinal axis to bring the selected needle into record-engaging position, and at least two stops for limiting the rotation of said pick-up, one of said stops being provided with means for adjusting the same whereby the selected needle is located in the correct record-engaging position.
  • a phonograph cartridge comprising a housing, a pick-up unit rota-tably mounted in said housing and having two spaced, alternately operating needles therein, said pick-up unit being rotatable about its longitudinal axis to bring the selected needle into record-engaging position, and at least two stops for limiting the rotation of said ick-up, said pick-up unit having a relatively fiat, lugshaped part, a spring secured at one end to said housing and the free end thereof contacting said lug-shaped part when one of said stops engages said rotated pick-up unit.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Unwinding Of Filamentary Materials (AREA)
US7572A 1959-03-26 1960-02-09 Pick-up for use with record players Expired - Lifetime US3105691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL237583 1959-03-26

Publications (1)

Publication Number Publication Date
US3105691A true US3105691A (en) 1963-10-01

Family

ID=19751636

Family Applications (1)

Application Number Title Priority Date Filing Date
US7572A Expired - Lifetime US3105691A (en) 1959-03-26 1960-02-09 Pick-up for use with record players

Country Status (6)

Country Link
US (1) US3105691A (fr)
BE (1) BE588997A (fr)
CH (1) CH381877A (fr)
ES (1) ES256751A1 (fr)
FR (1) FR1251910A (fr)
GB (1) GB947056A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334904A (en) * 1964-05-21 1967-08-08 Electro Voice Phonograph cartridge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756058A (en) * 1950-01-14 1956-07-24 Webster Electric Co Inc Transducer supporting and positioning means
US2793254A (en) * 1955-04-07 1957-05-21 Electro Voice Cartridge case and turnover mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756058A (en) * 1950-01-14 1956-07-24 Webster Electric Co Inc Transducer supporting and positioning means
US2793254A (en) * 1955-04-07 1957-05-21 Electro Voice Cartridge case and turnover mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334904A (en) * 1964-05-21 1967-08-08 Electro Voice Phonograph cartridge

Also Published As

Publication number Publication date
FR1251910A (fr) 1961-01-20
ES256751A1 (es) 1960-06-01
BE588997A (fr) 1960-09-26
GB947056A (en) 1964-01-22
CH381877A (de) 1964-09-15

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