GB226873A - Improvements in and relating to loud speakers for wireless telephony and other purposes - Google Patents

Improvements in and relating to loud speakers for wireless telephony and other purposes

Info

Publication number
GB226873A
GB226873A GB2412923A GB2412923A GB226873A GB 226873 A GB226873 A GB 226873A GB 2412923 A GB2412923 A GB 2412923A GB 2412923 A GB2412923 A GB 2412923A GB 226873 A GB226873 A GB 226873A
Authority
GB
United Kingdom
Prior art keywords
purposes
relating
loud speakers
wireless telephony
cotton wool
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
GB2412923A
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 GB2412923A priority Critical patent/GB226873A/en
Publication of GB226873A publication Critical patent/GB226873A/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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • 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
    • H04R7/26—Damping by means acting directly on free portion of diaphragm or cone

Landscapes

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

Abstract

226,873. Rosen, E. E., and Seibt, G. Sept. 27, 1923. Magnetic instruments.-The flat or conical diaphragm of a horned or hornless telephone receiver for loud-speaking purposes is damped by filling the space on one or both sides of the diaphragm with cotton wool or down, or with down backed by cotton wool. According to the Provisional Specification felt may be similarly employed. Specification 224,936 is referred to.
GB2412923A 1923-09-27 1923-09-27 Improvements in and relating to loud speakers for wireless telephony and other purposes Expired GB226873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2412923A GB226873A (en) 1923-09-27 1923-09-27 Improvements in and relating to loud speakers for wireless telephony and other purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2412923A GB226873A (en) 1923-09-27 1923-09-27 Improvements in and relating to loud speakers for wireless telephony and other purposes

Publications (1)

Publication Number Publication Date
GB226873A true GB226873A (en) 1924-12-29

Family

ID=10206845

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2412923A Expired GB226873A (en) 1923-09-27 1923-09-27 Improvements in and relating to loud speakers for wireless telephony and other purposes

Country Status (1)

Country Link
GB (1) GB226873A (en)

Similar Documents

Publication Publication Date Title
GB226873A (en) Improvements in and relating to loud speakers for wireless telephony and other purposes
GB223965A (en) Improved means for supporting the diaphragm of a telephone transmitter or receiver
GB188763A (en) Improvements in sound transmitters, and reproducers
GB235529A (en) Improvements in and relating to loud speakers
GB233008A (en) Improvements in telephone receivers and like instruments particularly for use in wireless receiving apparatus
GB759236A (en) Improvements in or relating to loudspeakers
CH302743A (en) Telephone subscriber station with circuit for back hearing attenuation and adaptation of microphone and receiver.
GB248497A (en) Improvements in and relating to diaphragms for sound boxes
GB300252A (en) Improvements in or relating to circuit arrangements suitable for biassing electrostatic loud speakers
GB259966A (en) Diaphragm sound-reproducers for wireless apparatus, gramophones and the like
GB121016A (en) Improvements in Silencing Pads for Telephone or Speaking Tube Earpieces and Earstoppers.
GB301638A (en) Improvements in or relating to loud speakers
GB224679A (en) Attachments for telephone receivers
GB353030A (en) Improvements in or relating to acoustic devices such as loud speakers
GB259947A (en) Improvements in and relating to telephone apparatus
GB224369A (en) Improvements in and relating to loud speakers for wireless telephonic installations
GB266513A (en) Improvements in or relating to diaphragms for telephones, talking machines and the like
GB228880A (en) Diaphragm for radio loud speakers, gramophones, microphones and the like
GB237699A (en) Improvements in and relating to loud speakers and to electromagnetically vibrated diaphragms
CA232372A (en) Combined talking machine sound box, and radio microphone
ES179059A1 (en) IMPROVEMENTS IN HIGH-VOICE TELEPHONE DEVICES
ES201451A1 (en) Improvements in the acoustic signals players to be positioned in all kinds of vehicles (Machine-translation by Google Translate, not legally binding)
GB212373A (en) Improvements connected with telephone earpieces
GB235783A (en) Improvements in or relating to loud speaking telephonic receivers
GB782998A (en) A device for the reproduction of sound