US2238863A - Translation device for phonographs - Google Patents

Translation device for phonographs Download PDF

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Publication number
US2238863A
US2238863A US263229A US26322939A US2238863A US 2238863 A US2238863 A US 2238863A US 263229 A US263229 A US 263229A US 26322939 A US26322939 A US 26322939A US 2238863 A US2238863 A US 2238863A
Authority
US
United States
Prior art keywords
armature
air gap
magnetic
magnetic circuit
flux
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
US263229A
Other languages
English (en)
Inventor
Leland D Norton
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.)
Dictaphone Corp
Original Assignee
Dictaphone 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 Dictaphone Corp filed Critical Dictaphone Corp
Priority to US263229A priority Critical patent/US2238863A/en
Priority to GB5100/40A priority patent/GB539308A/en
Priority to CH213942D priority patent/CH213942A/de
Priority to FR865011D priority patent/FR865011A/fr
Application granted granted Critical
Publication of US2238863A publication Critical patent/US2238863A/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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/16—Mounting or connecting stylus to transducer with or without damping means
    • 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)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
US263229A 1939-03-21 1939-03-21 Translation device for phonographs Expired - Lifetime US2238863A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US263229A US2238863A (en) 1939-03-21 1939-03-21 Translation device for phonographs
GB5100/40A GB539308A (en) 1939-03-21 1940-03-19 Improvements in translation devices for phonographs
CH213942D CH213942A (de) 1939-03-21 1940-03-21 Elektromechanische Vorrichtung zur Übertragung von Schwingungen.
FR865011D FR865011A (fr) 1939-03-21 1940-04-06 Dispositif transpositeur électromécanique tel qu'enregistreur ou reproducteur phonographique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US263229A US2238863A (en) 1939-03-21 1939-03-21 Translation device for phonographs

Publications (1)

Publication Number Publication Date
US2238863A true US2238863A (en) 1941-04-15

Family

ID=23000905

Family Applications (1)

Application Number Title Priority Date Filing Date
US263229A Expired - Lifetime US2238863A (en) 1939-03-21 1939-03-21 Translation device for phonographs

Country Status (4)

Country Link
US (1) US2238863A (fr)
CH (1) CH213942A (fr)
FR (1) FR865011A (fr)
GB (1) GB539308A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485432A (en) * 1945-11-28 1949-10-18 Lionel B Cornwell Magnetic phonograph pickup
US2496047A (en) * 1947-06-18 1950-01-31 Rca Corp Art of recording and reproducing two-sided magnetic records
US2508783A (en) * 1945-02-16 1950-05-23 Lionel B Cornwell Electrical sound translating device
US2554696A (en) * 1947-05-26 1951-05-29 Henry H Bruderlin Magnetic phonograph pickup head with two pairs of pole pieces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508783A (en) * 1945-02-16 1950-05-23 Lionel B Cornwell Electrical sound translating device
US2485432A (en) * 1945-11-28 1949-10-18 Lionel B Cornwell Magnetic phonograph pickup
US2554696A (en) * 1947-05-26 1951-05-29 Henry H Bruderlin Magnetic phonograph pickup head with two pairs of pole pieces
US2496047A (en) * 1947-06-18 1950-01-31 Rca Corp Art of recording and reproducing two-sided magnetic records

Also Published As

Publication number Publication date
CH213942A (de) 1941-03-31
GB539308A (en) 1941-09-04
FR865011A (fr) 1941-05-12

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