US1789104A - Transmitter for telephony - Google Patents

Transmitter for telephony Download PDF

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Publication number
US1789104A
US1789104A US139338A US13933826A US1789104A US 1789104 A US1789104 A US 1789104A US 139338 A US139338 A US 139338A US 13933826 A US13933826 A US 13933826A US 1789104 A US1789104 A US 1789104A
Authority
US
United States
Prior art keywords
microphones
transmitter
telephony
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 - Lifetime
Application number
US139338A
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English (en)
Inventor
Kuchenmeister Heinrich
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 US1789104A publication Critical patent/US1789104A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers

Definitions

  • the object of this invention is an arrangement of. apparatus which permits this idea to be applied to telephone transmitters.
  • the drawing illustrates diagrammatically 10 one form of the invention.
  • each transmitter microphone 1 to 4 having individual diaphragms are arranged before the person 1 using the telephone in succession to oneanother, preferably as the accompanying drawing shows, in a single trumpet 5 say 80 cms. long.
  • the microphones 1 and 4 are 9 arranged at opposite ends of the trumpet while the microphones 2-and 3 are disposed '2 at intermediate points therein. It is advantageous to adjust the sensitivity, that is 139,338, and in Germany October 13, 1925.
  • V HEINRICH KUCHENMEISTER V HEINRICH KUCHENMEISTER.
  • the time intervals of less than one hundredth of a second resulting from the separation is sufiicient to produce that multiple overlapping of the sound impulses which is received by theiearlas an enhanced fulness o of the tones. It is thus possible to obtain good reception in spite of unfavourable, conditions particularly in long distance telephone lines. p o i
  • the reception can be notably improved by using two transmission lines instead of one, the second line being led to a second receiver.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
US139338A 1925-10-13 1926-10-04 Transmitter for telephony Expired - Lifetime US1789104A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE259947X 1925-10-13

Publications (1)

Publication Number Publication Date
US1789104A true US1789104A (en) 1931-01-13

Family

ID=5966941

Family Applications (1)

Application Number Title Priority Date Filing Date
US139338A Expired - Lifetime US1789104A (en) 1925-10-13 1926-10-04 Transmitter for telephony

Country Status (4)

Country Link
US (1) US1789104A (enrdf_load_stackoverflow)
FR (1) FR622950A (enrdf_load_stackoverflow)
GB (1) GB259947A (enrdf_load_stackoverflow)
NL (1) NL19330C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988004125A1 (en) * 1986-11-28 1988-06-02 Case Eliot M Unidirectional enhancer for microphones
FR3047382A1 (fr) * 2016-02-02 2017-08-04 Viga Music Tools Procede et dispositif de prise de son dans un instrument a vent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988004125A1 (en) * 1986-11-28 1988-06-02 Case Eliot M Unidirectional enhancer for microphones
US4768614A (en) * 1986-11-28 1988-09-06 Case Eliot M Unidirectional enhancer for microphones
FR3047382A1 (fr) * 2016-02-02 2017-08-04 Viga Music Tools Procede et dispositif de prise de son dans un instrument a vent

Also Published As

Publication number Publication date
GB259947A (en) 1927-02-03
FR622950A (fr) 1927-06-09
NL19330C (enrdf_load_stackoverflow)

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