GB198799A - Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus - Google Patents

Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus

Info

Publication number
GB198799A
GB198799A GB736422A GB736422A GB198799A GB 198799 A GB198799 A GB 198799A GB 736422 A GB736422 A GB 736422A GB 736422 A GB736422 A GB 736422A GB 198799 A GB198799 A GB 198799A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
sound
chamber
gramophones
suchlike
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
GB736422A
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 GB736422A priority Critical patent/GB198799A/en
Publication of GB198799A publication Critical patent/GB198799A/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
    • H04R23/00Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/004Transducers other than those covered by groups H04R9/00 - H04R21/00 using ionised gas

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

198,799. Clifford of Chudleigh, (W. H. Clifford), Baron. March 13, 1922. Multiple-diaphragm sound-boxes.- In apparatus in which the vibrations of the usual diaphragm 2 of a gramophone &c. are amplified by means of extra diaphragms 5, 7, which, with the diaphragm 2 form an air chamber 6 and a second chamber 8 containing non-inflammable gas preferably at less than atmospheric pressure, an electric current is passed through the gas chamber. When used for reproducing sound, this current preferably varies in correspondence with the sound waves. Fig. 2 shows the application to the reproduction of sound from a photographic record formed on a kinema film, by means of a selenium cell 13. Current variations corresponding to the sound record are passed through an electromagnet 15 the armature of which is fixed to the rear diaphragm 16, and are also applied to the gas chamber 17 to amplify the vibrations of the diaphragm 16. In order to transmit sound to a distance the back of the diaphragm 7 may be silvered to reflect a beam of light on to a selenium cell, so producing current variations corresponding to the sound waves.
GB736422A 1922-03-13 1922-03-13 Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus Expired GB198799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB736422A GB198799A (en) 1922-03-13 1922-03-13 Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB736422A GB198799A (en) 1922-03-13 1922-03-13 Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus

Publications (1)

Publication Number Publication Date
GB198799A true GB198799A (en) 1923-06-13

Family

ID=9831699

Family Applications (1)

Application Number Title Priority Date Filing Date
GB736422A Expired GB198799A (en) 1922-03-13 1922-03-13 Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus

Country Status (1)

Country Link
GB (1) GB198799A (en)

Similar Documents

Publication Publication Date Title
GB198799A (en) Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus
Kellogg First Installment: History of Sound Motion Pictures
Clark An acoustic lens as a directional microphone
USRE18689E (en) hollister
GB313904A (en) Improvements relating to the reproduction of sound from a gramophone record
US1554561A (en) Sound-reproducing mechanism
Wente Contributions of telephone research to sound pictures
US1799235A (en) Sound-recording system
US1713039A (en) Phonograph recording and reproducing
Wente General principles of sound recording
US1531252A (en) Electrical reproducer for phonograph records
GB191315175A (en) Improvements in and relating to Sound Transmitting Devices for Talking Motion Picture Apparatus.
GB432811A (en) An improved method of, and apparatus for, recording sound
US1557529A (en) Electrical reproducer for phonographs
GB227240A (en) Improvements in, or relating to, gramophones, loud speakers, and other sound-recording or reproducing apparatus
US1745118A (en) Sound-reproducing device
US1313751A (en) smith
US1840772A (en) Radio phonographic apparatus
GB810912A (en) Improvements in or relating to electro-acoustic converting devices
Bogert Stereophonic sound reproduction enhancement utilizing the Haas effect
Dyer et al. The Interaction of A Sound Wave with A Point‐to‐Plane Corona Discharge
GB191318163A (en) Improvements in and relating to Combined Moving Picture and Talking Machine.
GB177534A (en) Improvements in apparatus for recording sounds photographically
GB432603A (en) Improvements in or relating to apparatus for photographically recording sound
GB191301444A (en) Improvements in and connected with the Transmission to a Distance and Recording of Theatrical Performances and the like.