GB214413A - Improvements in and relating to sound boxes for gramophones and the like - Google Patents

Improvements in and relating to sound boxes for gramophones and the like

Info

Publication number
GB214413A
GB214413A GB786823A GB786823A GB214413A GB 214413 A GB214413 A GB 214413A GB 786823 A GB786823 A GB 786823A GB 786823 A GB786823 A GB 786823A GB 214413 A GB214413 A GB 214413A
Authority
GB
United Kingdom
Prior art keywords
sound
gramophones
relating
perforations
cover
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
GB786823A
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 GB786823A priority Critical patent/GB214413A/en
Publication of GB214413A publication Critical patent/GB214413A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

214,413. Legge, A. di. March 19, 1923.. Sound-box cases; horns, arranging. - Soundboxes for gramophones &c. have a cover a on the face forming a resonance chamber c between it and the diaphragm, perforations e, small in area compared with the area of the cover, being provided for the emission of sound. An insulating washer h, having an aperture registering with the sound channel leading to the tone arm, isplaced between the back plate of the sound box and, the casing m. In the modification shown in Fig. 4, the perforations f are formed in the rim of the resonance chamber and small trumpets may be arranged at the outlets to further amplify the sound.
GB786823A 1923-03-19 1923-03-19 Improvements in and relating to sound boxes for gramophones and the like Expired GB214413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB786823A GB214413A (en) 1923-03-19 1923-03-19 Improvements in and relating to sound boxes for gramophones and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB786823A GB214413A (en) 1923-03-19 1923-03-19 Improvements in and relating to sound boxes for gramophones and the like

Publications (1)

Publication Number Publication Date
GB214413A true GB214413A (en) 1924-04-24

Family

ID=9841312

Family Applications (1)

Application Number Title Priority Date Filing Date
GB786823A Expired GB214413A (en) 1923-03-19 1923-03-19 Improvements in and relating to sound boxes for gramophones and the like

Country Status (1)

Country Link
GB (1) GB214413A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190062231A1 (en) * 2017-08-24 2019-02-28 Bio-Flex Labs, LLC Apparatus and Methods for Fertilizer Production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190062231A1 (en) * 2017-08-24 2019-02-28 Bio-Flex Labs, LLC Apparatus and Methods for Fertilizer Production
US11091403B2 (en) * 2017-08-24 2021-08-17 Bio-Flex Labs, LLC Apparatus and methods for fertilizer production

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