GB257651A - Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations - Google Patents

Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations

Info

Publication number
GB257651A
GB257651A GB1374525A GB1374525A GB257651A GB 257651 A GB257651 A GB 257651A GB 1374525 A GB1374525 A GB 1374525A GB 1374525 A GB1374525 A GB 1374525A GB 257651 A GB257651 A GB 257651A
Authority
GB
United Kingdom
Prior art keywords
tube
gramophones
records
converting
corresponding electric
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
GB1374525A
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.)
FELIX PERCEVAL WILLS
JOHN HENRY BUTCHER
British Thomson Houston Co Ltd
Original Assignee
FELIX PERCEVAL WILLS
JOHN HENRY BUTCHER
British Thomson Houston 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 FELIX PERCEVAL WILLS, JOHN HENRY BUTCHER, British Thomson Houston Co Ltd filed Critical FELIX PERCEVAL WILLS
Priority to GB1374525A priority Critical patent/GB257651A/en
Publication of GB257651A publication Critical patent/GB257651A/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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus

Abstract

257,651. British Thomson-Houston Co., Ltd., Butcher, J. H., and Wills, F. P. May 26, 1925. Magnetic instruments. - An electromagnetic transmitter operated by a gramophone or like needle is arranged as a complete unit detachably carried by the tone-arm. In the reproducer shown in Fig. 1, a flat annual magnet 11, which may consist of radial arms, is surrounded by a tube 12 of magnetic material. This tube is clamped against or integral with a flange 13 on a smaller cylindrical core 14 of magnetic material. Within the gap between the members 11, 14 is located an annular coil 19, which is mounted on a former 18 attached to a rod 17. The rod is connected to a stylus-bar 16, mounted as usual, a perforated diaphragm 24 being preferably provided for centering the coil. A steel tube 22 forms a pole piece for the magnet, and also supports an adapter 23 for connection to the usual tone-arm. A disclaimer is inserted to Specification 254,403.
GB1374525A 1925-05-26 1925-05-26 Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations Expired GB257651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1374525A GB257651A (en) 1925-05-26 1925-05-26 Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1374525A GB257651A (en) 1925-05-26 1925-05-26 Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations

Publications (1)

Publication Number Publication Date
GB257651A true GB257651A (en) 1926-08-26

Family

ID=10028604

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1374525A Expired GB257651A (en) 1925-05-26 1925-05-26 Acoustical apparatus particularly for converting the sound impressions of gramophones or like records into corresponding electric oscillations

Country Status (1)

Country Link
GB (1) GB257651A (en)

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