FR616421A - Generating device producing, by transformation of a mechanical movement derived from a phonograph disc, alternating current suitable for being amplified in a radio receiver and finally to be reconverted into sound - Google Patents

Generating device producing, by transformation of a mechanical movement derived from a phonograph disc, alternating current suitable for being amplified in a radio receiver and finally to be reconverted into sound

Info

Publication number
FR616421A
FR616421A FR616421DA FR616421A FR 616421 A FR616421 A FR 616421A FR 616421D A FR616421D A FR 616421DA FR 616421 A FR616421 A FR 616421A
Authority
FR
France
Prior art keywords
reconverted
amplified
transformation
sound
finally
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
Other languages
French (fr)
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.)
HOPKINS CORP
Original Assignee
HOPKINS 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 HOPKINS CORP filed Critical HOPKINS CORP
Application granted granted Critical
Publication of FR616421A publication Critical patent/FR616421A/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)
  • Electromagnets (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR616421D 1925-11-18 1926-05-20 Generating device producing, by transformation of a mechanical movement derived from a phonograph disc, alternating current suitable for being amplified in a radio receiver and finally to be reconverted into sound Expired FR616421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69807A US1760647A (en) 1925-11-18 1925-11-18 Electrical pick-up

Publications (1)

Publication Number Publication Date
FR616421A true FR616421A (en) 1927-02-02

Family

ID=22091335

Family Applications (1)

Application Number Title Priority Date Filing Date
FR616421D Expired FR616421A (en) 1925-11-18 1926-05-20 Generating device producing, by transformation of a mechanical movement derived from a phonograph disc, alternating current suitable for being amplified in a radio receiver and finally to be reconverted into sound

Country Status (4)

Country Link
US (1) US1760647A (en)
DE (1) DE540598C (en)
FR (1) FR616421A (en)
GB (1) GB261698A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451221A (en) * 1944-10-30 1948-10-12 William H Hutter Wedged needle type phonograph pickup
US2572139A (en) * 1946-03-12 1951-10-23 Stanley A Hall Phonograph reproducing device
US2553573A (en) * 1947-04-30 1951-05-22 Farnsworth Res Corp Magnetic phonograph pickup having an armature support within the pickup coil
US2547361A (en) * 1947-05-19 1951-04-03 Donald J Baker Pickup head using torsional mount for armatures
US2771512A (en) * 1951-05-12 1956-11-20 Webster Electric Co Inc Transducer

Also Published As

Publication number Publication date
DE540598C (en) 1931-12-19
US1760647A (en) 1930-05-27
GB261698A (en) 1927-05-05

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