US1342582A - Telephone-transmitter - Google Patents

Telephone-transmitter Download PDF

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Publication number
US1342582A
US1342582A US106093A US10609316A US1342582A US 1342582 A US1342582 A US 1342582A US 106093 A US106093 A US 106093A US 10609316 A US10609316 A US 10609316A US 1342582 A US1342582 A US 1342582A
Authority
US
United States
Prior art keywords
diaphragm
electrodes
transmitter
electrode
telephone
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
US106093A
Other languages
English (en)
Inventor
Birrell William
Birrell James
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.)
AUDIBLE TELEPHONE Co
Original Assignee
AUDIBLE TELEPHONE Co
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 NL4427D priority Critical patent/NL4427C/xx
Application filed by AUDIBLE TELEPHONE Co filed Critical AUDIBLE TELEPHONE Co
Priority to US106093A priority patent/US1342582A/en
Priority to GB1083217A priority patent/GB113912A/en
Priority to FR495429A priority patent/FR495429A/fr
Priority to DE1919353757D priority patent/DE353757C/de
Application granted granted Critical
Publication of US1342582A publication Critical patent/US1342582A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Definitions

  • One of the objects of the invention is the provision of a more efficient variable resistance medium through the employment of abody of loose carbon granules disposed between two relatively fixed electrodes adapted to be vibrated in unison upon a diaphragm, said granules being unaffected by compression or decompression of said electrodes.
  • Another object of the invention is a more perfect transmission of sound'waves to the electric current resistance varying devices through the provision of a loosely housed diaphragm with which both electrodes of said device are rigidly connected, whereby the diaphragm movements completely respondto the sound impacts of the voice unaccompanied by overlaying foreign tones due to distortion or undue molecular strain of ,themetal or material from which the diaphragm is made.
  • Figure-1 is a view in longitudinal section of a telephone transmitter embodying our invention.
  • Fig. 2 is a view in rear elevation of the same with the back plate partly broken away to expose a portion of the interior mechanism.
  • Fig.3 is an enlarged fragmentary view of a detail shown in Fig. 1.
  • the reference numeral 1 indicates a casing formed with a central threaded aperture with which the mouth-piece 2 is connected.
  • a back plate 3 is secured upon the reverse side of said cas- Manama 8,1920.
  • An. unconfined circular diaphragm plate 7 is positioned within said compartment.
  • a rubber insulating ring 8 is engaged about the peripheral edges of saiddiaphragm.
  • the rubber ring 8 serves to electrically insulate the diaphragm from the casing and also to insulate the diaphragm from any foreign vibrations of the casing.
  • the diaphragm is formed with a centrally disposed electrode-chamber 10 having a front wall 11.
  • a metalffbutton 12having a carbon electrode 13 secured in intimate electrical contact to its rear face is rigidly connected to said front wall by a screw-stud 15 and nut 16 preferably integral therewith.
  • Anoppositely disposed electrode 17' is secured in like manner to a button 18 which is connected by screw-stud 20 and nuts 21 to a mica disk 22 which forms the rear. wall of said electrode chamber 10 and is secured at its edges by rivets
  • a metal ring 25 overlays said disk upon which the heads of said rivets bear.
  • Electrical circuit wires 26 and 27 are reif spect'ively connected by nuts 21 to studs 20 of electrode 17 insulated "from the diaphragm to said insulating disk, and to screwbolt 28 performing the 'oflice of one of rivets 23 through which electrical current may pass through the side and front walls of said electrode chamber, stud 15 to electrode 13.v v
  • a plurality of felt blocks 30 are indicated as cemented or otherwise secured to backplate 3' to prevent too great displacement of the diaphragm? Said felt blocks also serve to insulate the diaphragm from any foreign vibrations which may be set up inthe casing.
  • both electrodes 13' and 17 being secured to thediaphragm with'substantially the same shaken by the aforesaid vibrations in the field between said electrodes, into states of activity of the separate carbon particles 7 seemingly proportionate to the sound waves of the actuating voice, and conveying from one electrode to the other electrical impulses and currentin direct ratio to the quantity of sound affecting the diaphragm.
  • a transmitter including a loosely housed diaphragm, and two parallel electrodes mounted relatively rigid upon said diaphragm.
  • a transmitter including a loosely housed diaphragm having an electrode chamber in its central portion, electrodes r gidly mounted with respect to each other upon opposite sides of's'aid'chamber, and a 1 quantity of variable resistance granules within said chamber.
  • a transmitter including a loosely housed diaphragm having an electrode chamber partially filled with granular conducting material, and a pair of electrodes,
  • a transmitter comprising a casing, a
  • a diaphragm' In a telephone transmitter a diaphragm', an electrode chamber formed centrally therein, an electrode secured in the chamber parallel to the plane of the diaphragm, an insulating cover for the chamber, an electrode inside the chamber parallel to the first mentioned electrode and secured to the cover, and a ring riveted "to the diaphragm for securing the cover in position thereon.
  • a transmitter comprising a casing, a diaphragm loosely housed in said casing, non-metallic cushioning means “for insulatingthe diaphragm from the casing, a pair of relatively rigid electrodes supported on the diaphragm, and a'variable resistance medium retained between said electrodes.
  • a transmitter comprising a casing,-a diaphragm loosely housed therein, and a pair of insulated relatively rigid electrodes supported on and inclosed by the diaphragm.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Exhaust Silencers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
US106093A 1916-06-27 1916-06-27 Telephone-transmitter Expired - Lifetime US1342582A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL4427D NL4427C (de) 1916-06-27
US106093A US1342582A (en) 1916-06-27 1916-06-27 Telephone-transmitter
GB1083217A GB113912A (en) 1916-06-27 1917-07-27 Telephone Transmitter.
FR495429A FR495429A (fr) 1916-06-27 1917-08-18 Transmetteur téléphonique
DE1919353757D DE353757C (de) 1916-06-27 1919-11-15 Schuettelmikrophon, in welchem eine becherartige Ausbuchtung in der Mitte der Schallplatte zur Aufnahme der einen Elektrode und der Kohlenkoernchen o. dgl. dient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US106093A US1342582A (en) 1916-06-27 1916-06-27 Telephone-transmitter

Publications (1)

Publication Number Publication Date
US1342582A true US1342582A (en) 1920-06-08

Family

ID=22309447

Family Applications (1)

Application Number Title Priority Date Filing Date
US106093A Expired - Lifetime US1342582A (en) 1916-06-27 1916-06-27 Telephone-transmitter

Country Status (4)

Country Link
US (1) US1342582A (de)
DE (1) DE353757C (de)
FR (1) FR495429A (de)
NL (1) NL4427C (de)

Also Published As

Publication number Publication date
FR495429A (fr) 1919-10-08
DE353757C (de) 1922-05-26
NL4427C (de)

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