US1768377A - Sound reproducing and recording device - Google Patents

Sound reproducing and recording device Download PDF

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Publication number
US1768377A
US1768377A US334250A US33425029A US1768377A US 1768377 A US1768377 A US 1768377A US 334250 A US334250 A US 334250A US 33425029 A US33425029 A US 33425029A US 1768377 A US1768377 A US 1768377A
Authority
US
United States
Prior art keywords
members
recording device
sound
strictive
magneto
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
US334250A
Other languages
English (en)
Inventor
James T Serduke
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.)
General Electric Co
Original Assignee
General Electric 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
Priority to BE367125D priority Critical patent/BE367125A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US334250A priority patent/US1768377A/en
Priority to GB999/30A priority patent/GB352914A/en
Priority to FR688658D priority patent/FR688658A/fr
Application granted granted Critical
Publication of US1768377A publication Critical patent/US1768377A/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
    • H04R15/00—Magnetostrictive transducers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/046—Vibration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • Y10T82/2585—Tool rest

Definitions

  • FIG. 1 illustrates a loud speaker including a rigld conical diaphragm 10 WhlCll maybe supported by" a flexible annulus-surrounding its base and a coil 11 adapted toreceive the electric impulses which are to be converted into sound.
  • the coil 11 is arranged to create a magnetic field which acts upon a driving member 12.
  • Member 12 is placed through the center of the coil 11, is rigidly mounted at one end to abase'l3 and at the other end is attached to the cone 10.
  • the member 12 may be either a rod or tube which is capable of varying its length 1n response to variations in the magnetlc field created bycurrents in the C011 11.
  • the theory of such expansion or contraction is not clearly understood but has been proven to exist.
  • alloys comprising between 40% and 70% cobalt alloyed with either iron or nickel, expand as much as .00084 millimeter per centimeter of length for an increase of 100 to 200 gausses in intensity of the magnetic field.
  • Nickel contracts approximately the same amount for the same increase in magnetic intensity. This contraction and expansion varies with difl'erent alloys and varies even with difl'erent treatments of the same alloy.
  • Caps 16 and 17 are mounted upon the upper ends of the magneto-strictive members 14 and 15 respectively, and support a member 1'8 by means of spring members 19 and 20., The latter are spaced apart, and are rigid in a vertical plane but resilient horizontally. The opposite ends of the members 14 and 15 are imbedded in a member 25 which in turn is supported by base 13. In operation therefore, the caps 16 and 17 and therefore springs 19 and 20 move in opposite directions under the influence. of the magnetic field variations and thereby move the whereby a groove'is cut in the blank 23 which is rotated by plate 24.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
US334250A 1929-01-22 1929-01-22 Sound reproducing and recording device Expired - Lifetime US1768377A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE367125D BE367125A (enrdf_load_stackoverflow) 1929-01-22
US334250A US1768377A (en) 1929-01-22 1929-01-22 Sound reproducing and recording device
GB999/30A GB352914A (en) 1929-01-22 1930-01-10 Improvements in and relating to sound reproducing and recording devices
FR688658D FR688658A (fr) 1929-01-22 1930-01-22 Application de la magnétostriction aux appareils vibrants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US334250A US1768377A (en) 1929-01-22 1929-01-22 Sound reproducing and recording device

Publications (1)

Publication Number Publication Date
US1768377A true US1768377A (en) 1930-06-24

Family

ID=23306325

Family Applications (1)

Application Number Title Priority Date Filing Date
US334250A Expired - Lifetime US1768377A (en) 1929-01-22 1929-01-22 Sound reproducing and recording device

Country Status (4)

Country Link
US (1) US1768377A (enrdf_load_stackoverflow)
BE (1) BE367125A (enrdf_load_stackoverflow)
FR (1) FR688658A (enrdf_load_stackoverflow)
GB (1) GB352914A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433337A (en) * 1943-01-19 1947-12-30 Bell Telephone Labor Inc Magnetostrictive signal translating device
US2441158A (en) * 1944-11-03 1948-05-11 Krasnow Leonard Machine tool
US2475148A (en) * 1945-04-16 1949-07-05 Massa Frank Transducer means
US2730103A (en) * 1954-11-22 1956-01-10 Mackta Leo Magnetostrictive cutting tool
US2921372A (en) * 1955-06-24 1960-01-19 Jr Albert G Bodine Torsional vibration sonic drill
US3469475A (en) * 1967-02-27 1969-09-30 Sperry Canada Ltd Apparatus for maintaining positional stability between a tool member and a workpiece
US4397012A (en) * 1978-12-26 1983-08-02 Burundukov Valentin M Electrodynamic pickup cartridge having simplified coil structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433337A (en) * 1943-01-19 1947-12-30 Bell Telephone Labor Inc Magnetostrictive signal translating device
US2441158A (en) * 1944-11-03 1948-05-11 Krasnow Leonard Machine tool
US2475148A (en) * 1945-04-16 1949-07-05 Massa Frank Transducer means
US2730103A (en) * 1954-11-22 1956-01-10 Mackta Leo Magnetostrictive cutting tool
US2921372A (en) * 1955-06-24 1960-01-19 Jr Albert G Bodine Torsional vibration sonic drill
US3469475A (en) * 1967-02-27 1969-09-30 Sperry Canada Ltd Apparatus for maintaining positional stability between a tool member and a workpiece
US4397012A (en) * 1978-12-26 1983-08-02 Burundukov Valentin M Electrodynamic pickup cartridge having simplified coil structure

Also Published As

Publication number Publication date
BE367125A (enrdf_load_stackoverflow)
FR688658A (fr) 1930-08-27
GB352914A (en) 1931-07-16

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