GB191023742A - Improvements in or relating to Telephonic Apparatus. - Google Patents

Improvements in or relating to Telephonic Apparatus.

Info

Publication number
GB191023742A
GB191023742A GB191023742DA GB191023742A GB 191023742 A GB191023742 A GB 191023742A GB 191023742D A GB191023742D A GB 191023742DA GB 191023742 A GB191023742 A GB 191023742A
Authority
GB
United Kingdom
Prior art keywords
ear
receiver
relating
trumpet
sound
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
Inventor
Edward Alfred Graham
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
Application granted granted Critical
Publication of GB191023742A publication Critical patent/GB191023742A/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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • 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

Landscapes

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

Abstract

23,742. Graham, E. A. Oct. 13. Earpieces.-A telephone receiver a is provided with a sound-amplifying trumpet b for use at quiet times and ear-tubes c for use at other times. It may be arranged that the trumpet and ear-pieces are always in communication with the receiver, or the rotation of the ear-pieces may be arranged to operate cut-off devices for one or both of them Sound-vibrations may also be obtained from both sides of the diaphragm. The receiver may be of the kind described in Specification 25,112/09. Specification 10,577/10 is also referred to.
GB191023742D 1910-10-13 1910-10-13 Improvements in or relating to Telephonic Apparatus. Expired GB191023742A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191023742T 1910-10-13

Publications (1)

Publication Number Publication Date
GB191023742A true GB191023742A (en) 1912-01-12

Family

ID=32493893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191023742D Expired GB191023742A (en) 1910-10-13 1910-10-13 Improvements in or relating to Telephonic Apparatus.

Country Status (1)

Country Link
GB (1) GB191023742A (en)

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