GB319921A - Improvements in gramophone and like sound boxes - Google Patents

Improvements in gramophone and like sound boxes

Info

Publication number
GB319921A
GB319921A GB27078/28A GB2707828A GB319921A GB 319921 A GB319921 A GB 319921A GB 27078/28 A GB27078/28 A GB 27078/28A GB 2707828 A GB2707828 A GB 2707828A GB 319921 A GB319921 A GB 319921A
Authority
GB
United Kingdom
Prior art keywords
disc
sound
diaphragm
box
gramophone
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
GB27078/28A
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 GB27078/28A priority Critical patent/GB319921A/en
Publication of GB319921A publication Critical patent/GB319921A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

319,921. Parker, T. H. Sept. 21, 1928. Sound-boxes. - A sound-box for gramophones &c. is provided with a sound-baffling device in the form of a main disc 5 and a superimposed disc 6 inserted between the diaphragm 1 and the back 4 of the sound-box, such superimposed disc 6 being provided with one or more spiral grooves 7 and having a central tubular extension 8 communicating through an aperture in the main disc 5 with the tone-arm. The diaphragm 1 and the discs 5, 6 may be resiliently mounted, as at 2, by means of split rubber rings. If desired, the disc 6 may be of dish shape and mounted in the same rubber ring as the diaphragm 1. A series of spirally grooved discs 6 may be mounted on the main disc 5 in such manner that their tubular outlets nest one within another.
GB27078/28A 1928-09-21 1928-09-21 Improvements in gramophone and like sound boxes Expired GB319921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB27078/28A GB319921A (en) 1928-09-21 1928-09-21 Improvements in gramophone and like sound boxes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27078/28A GB319921A (en) 1928-09-21 1928-09-21 Improvements in gramophone and like sound boxes

Publications (1)

Publication Number Publication Date
GB319921A true GB319921A (en) 1929-10-03

Family

ID=10253800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27078/28A Expired GB319921A (en) 1928-09-21 1928-09-21 Improvements in gramophone and like sound boxes

Country Status (1)

Country Link
GB (1) GB319921A (en)

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