US1454504A - Phonograph - Google Patents

Phonograph Download PDF

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Publication number
US1454504A
US1454504A US223327A US22332718A US1454504A US 1454504 A US1454504 A US 1454504A US 223327 A US223327 A US 223327A US 22332718 A US22332718 A US 22332718A US 1454504 A US1454504 A US 1454504A
Authority
US
United States
Prior art keywords
phonograph
filed april
surmmmted
spakss
sheecswsheet
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
US223327A
Inventor
George B Durch
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US223327A priority Critical patent/US1454504A/en
Application granted granted Critical
Publication of US1454504A publication Critical patent/US1454504A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Garments (AREA)

Description

Mayv s; 1923-.
G.B.BURCH PHONOGRAPH Filed April 18, 1918 4 SheecswSheet 5 PHQNOGRAPH Filed April mmmwwmmmmmh' l@ and dur 351e im 15 F0? more D hub and, spakss E URCH.
40 surmmmted by s',
US223327A 1918-04-18 1918-04-18 Phonograph Expired - Lifetime US1454504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US223327A US1454504A (en) 1918-04-18 1918-04-18 Phonograph

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US223327A US1454504A (en) 1918-04-18 1918-04-18 Phonograph

Publications (1)

Publication Number Publication Date
US1454504A true US1454504A (en) 1923-05-08

Family

ID=22836028

Family Applications (1)

Application Number Title Priority Date Filing Date
US223327A Expired - Lifetime US1454504A (en) 1918-04-18 1918-04-18 Phonograph

Country Status (1)

Country Link
US (1) US1454504A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640700A (en) * 1946-09-04 1953-06-02 Garrard Eng & Mfg Co Ltd Phonograph and the like
EP1574749A1 (en) 2004-03-10 2005-09-14 Concens A/S Gear with sinusoidal tooth profile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640700A (en) * 1946-09-04 1953-06-02 Garrard Eng & Mfg Co Ltd Phonograph and the like
EP1574749A1 (en) 2004-03-10 2005-09-14 Concens A/S Gear with sinusoidal tooth profile

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