GB300115A - Phonograph pick-up apparatus - Google Patents

Phonograph pick-up apparatus

Info

Publication number
GB300115A
GB300115A GB20964/28A GB2096428A GB300115A GB 300115 A GB300115 A GB 300115A GB 20964/28 A GB20964/28 A GB 20964/28A GB 2096428 A GB2096428 A GB 2096428A GB 300115 A GB300115 A GB 300115A
Authority
GB
United Kingdom
Prior art keywords
pole
armature
plate
engaging
coil
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
GB20964/28A
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.)
Federal Telegraph Co
Original Assignee
Federal Telegraph Co
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 Federal Telegraph Co filed Critical Federal Telegraph Co
Publication of GB300115A publication Critical patent/GB300115A/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
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

300,115. Federal Telegraph Co., (Assignees of Summers, H. A., and Sollie, S. A.). Nov. 5, 1927, [Convention date]. Gramophone pick-ups ; magnetic instruments.-In a gramophone pickup so designed that the parts are assembled on a base plate 1 arranged to lie in a plane parallel to the record during reproduction, the plate has an inclined plane surface 15 on which the pole-pieces 20, 21 are fitted, and the armature 17 is mounted in a plane passing through the longitudinal axis of the plate. The armature carrying the stylus 18, passes loosely through a coil 28 and has lateral extensions 17<a>, 17b formed on one side as a knifeedge for engaging a bearing surface 20<b> inset in the lower part of the pole-piece 20, and rounded on the other side for engaging the correspondingly shaped surface 21<a> of the pole-piece 21, a strip 23 of resilient material being interposed. The armature is clamped by a rubber strip 24 arranged between the prism-shaped head 22 and plates 25, 26 having inclined tongues such as 26<a>, the plates being adjustably mounted in slots such as 21d in the upper parts of the pole-pieces. The permanent magnet 9 is secured to the base by a member 10. The ends of the coil 28 are connected to terminals 33 on a terminal block 31, flexible leads from which extend through a hollow swivel arm to the usual amplifier.
GB20964/28A 1927-11-05 1928-07-19 Phonograph pick-up apparatus Expired GB300115A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US231374A US1769902A (en) 1927-11-05 1927-11-05 Phonograph pick-up apparatus

Publications (1)

Publication Number Publication Date
GB300115A true GB300115A (en) 1929-06-20

Family

ID=22868953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20964/28A Expired GB300115A (en) 1927-11-05 1928-07-19 Phonograph pick-up apparatus

Country Status (3)

Country Link
US (1) US1769902A (en)
FR (1) FR664735A (en)
GB (1) GB300115A (en)

Also Published As

Publication number Publication date
US1769902A (en) 1930-07-01
FR664735A (en) 1929-09-06

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