GB232688A - Improvements in talking machines - Google Patents

Improvements in talking machines

Info

Publication number
GB232688A
GB232688A GB200124A GB200124A GB232688A GB 232688 A GB232688 A GB 232688A GB 200124 A GB200124 A GB 200124A GB 200124 A GB200124 A GB 200124A GB 232688 A GB232688 A GB 232688A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
pivoted
spring
latch
frame
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
GB200124A
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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co 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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Priority to GB200124A priority Critical patent/GB232688A/en
Publication of GB232688A publication Critical patent/GB232688A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

232,688. Gramophone Co., Ltd., and Buckle, H. L. T. Jan. 24, 1924. Diaphragms not associated with tone-arms. - Relates to gramophones or the like, particularly of the kind having a large diaphragm, and consists in special means for enabling the diaphragm to stand upright when in use, to be laid flat when out of action, and to be readily locked in the operative position or to be unlocked by raising the diaphragm-supporting member. The diaphragm is mounted as usual in a ring 19, carried by a spider 18 which is pivoted to the apex of a triangular frame 14 by means of a screw and a friction mounting. The frame 14 is pivoted between lugs 13 on a tubular member 5, rotatably mounted on a tube 6, which protrudes from the axial bore of a hollow airm 3. This arm is mounted between bearings 4 so that it can swing in a plane parallel to that of the record. A spring-pressed latch 10 is pivoted on the arm 3, and when the diaphragm is in the vertical position shown, for playing, the latch engages in a notch 12 in the nose portion 5, looking it against rotation. When the machine is not required for use, the diaphragm-carrying framel is moved backwardly on its pivot between the lugs 13, until a projection 27 lifts the latch 10 out of locking engagement with the nose 5. The latter is then free to rotate and allow the diaphragm and its support 14 to be turned down to the horizontal position. The pressure of the needle on the record can be adjusted by means of a spring 23 within the tube 6, the spring acting through a plunger 22 upon a lug 21 depending from the frame 14.
GB200124A 1924-01-24 1924-01-24 Improvements in talking machines Expired GB232688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB200124A GB232688A (en) 1924-01-24 1924-01-24 Improvements in talking machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB200124A GB232688A (en) 1924-01-24 1924-01-24 Improvements in talking machines

Publications (1)

Publication Number Publication Date
GB232688A true GB232688A (en) 1925-04-24

Family

ID=9731848

Family Applications (1)

Application Number Title Priority Date Filing Date
GB200124A Expired GB232688A (en) 1924-01-24 1924-01-24 Improvements in talking machines

Country Status (1)

Country Link
GB (1) GB232688A (en)

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