GB423257A - Improvements in or relating to telephone transmitters - Google Patents

Improvements in or relating to telephone transmitters

Info

Publication number
GB423257A
GB423257A GB2718533A GB2718533A GB423257A GB 423257 A GB423257 A GB 423257A GB 2718533 A GB2718533 A GB 2718533A GB 2718533 A GB2718533 A GB 2718533A GB 423257 A GB423257 A GB 423257A
Authority
GB
United Kingdom
Prior art keywords
transmitter
sound waves
capsule
space
housing
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
GB2718533A
Other languages
English (en)
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
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
Priority to BE405299D priority Critical patent/BE405299A/xx
Application filed by Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Priority to GB2718533A priority patent/GB423257A/en
Priority to FR779146D priority patent/FR779146A/fr
Publication of GB423257A publication Critical patent/GB423257A/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 
    • H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
GB2718533A 1933-10-03 1933-10-03 Improvements in or relating to telephone transmitters Expired GB423257A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE405299D BE405299A (enrdf_load_stackoverflow) 1933-10-03
GB2718533A GB423257A (en) 1933-10-03 1933-10-03 Improvements in or relating to telephone transmitters
FR779146D FR779146A (fr) 1933-10-03 1934-10-01 Perfectionnements apportés aux microphones téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2718533A GB423257A (en) 1933-10-03 1933-10-03 Improvements in or relating to telephone transmitters

Publications (1)

Publication Number Publication Date
GB423257A true GB423257A (en) 1935-01-29

Family

ID=10255563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2718533A Expired GB423257A (en) 1933-10-03 1933-10-03 Improvements in or relating to telephone transmitters

Country Status (3)

Country Link
BE (1) BE405299A (enrdf_load_stackoverflow)
FR (1) FR779146A (enrdf_load_stackoverflow)
GB (1) GB423257A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR779146A (fr) 1935-03-29
BE405299A (enrdf_load_stackoverflow)

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