GB243396A - Improvements in or relating to loud speaking telephonic receivers - Google Patents

Improvements in or relating to loud speaking telephonic receivers

Info

Publication number
GB243396A
GB243396A GB1293824A GB1293824A GB243396A GB 243396 A GB243396 A GB 243396A GB 1293824 A GB1293824 A GB 1293824A GB 1293824 A GB1293824 A GB 1293824A GB 243396 A GB243396 A GB 243396A
Authority
GB
United Kingdom
Prior art keywords
relating
loud speaking
telephonic receivers
receivers
speaking telephonic
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
GB1293824A
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 GB1293824A priority Critical patent/GB243396A/en
Priority to GB3080324A priority patent/GB249225A/en
Publication of GB243396A publication Critical patent/GB243396A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements 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
    • H04R1/345—Arrangements 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 for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

243,396. Graham, E. A. May 26, 1924. Mounting and supporting, indicating, recording, and integrating apparatus. - An aneroid barometer, may be supported in the centre of the bell mouth flare or reflector of a telephonic loud speaker.
GB1293824A 1924-05-26 1924-05-26 Improvements in or relating to loud speaking telephonic receivers Expired GB243396A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1293824A GB243396A (en) 1924-05-26 1924-05-26 Improvements in or relating to loud speaking telephonic receivers
GB3080324A GB249225A (en) 1924-05-26 1924-12-22 Improvements in or relating to loud speaking telephonic receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1293824A GB243396A (en) 1924-05-26 1924-05-26 Improvements in or relating to loud speaking telephonic receivers

Publications (1)

Publication Number Publication Date
GB243396A true GB243396A (en) 1925-11-26

Family

ID=10013886

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1293824A Expired GB243396A (en) 1924-05-26 1924-05-26 Improvements in or relating to loud speaking telephonic receivers
GB3080324A Expired GB249225A (en) 1924-05-26 1924-12-22 Improvements in or relating to loud speaking telephonic receivers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3080324A Expired GB249225A (en) 1924-05-26 1924-12-22 Improvements in or relating to loud speaking telephonic receivers

Country Status (1)

Country Link
GB (2) GB243396A (en)

Also Published As

Publication number Publication date
GB249225A (en) 1926-03-22

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