US1624352A - Telephone transmitter - Google Patents

Telephone transmitter Download PDF

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Publication number
US1624352A
US1624352A US708116A US70811624A US1624352A US 1624352 A US1624352 A US 1624352A US 708116 A US708116 A US 708116A US 70811624 A US70811624 A US 70811624A US 1624352 A US1624352 A US 1624352A
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United States
Prior art keywords
electrodes
telephone transmitter
diaphragm
casing
insulating
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
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US708116A
Inventor
Charles R Moore
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AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US708116A priority Critical patent/US1624352A/en
Application granted granted Critical
Publication of US1624352A publication Critical patent/US1624352A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Definitions

  • Thisinvention relates to microphone' transmitters, .and more particularly to a type'adapted for use Ain combination with a sensitivereceiver ⁇ for the purpose of aiding deaf. persons to hear.
  • the ob]ect is' to provide-.anI instrument of this character which will be simple, compact, cheap. to manufacture and efficient in use,'h'a ving comparatively few parts which are assembled in such a manner as to be accessible for purpose of repair, adjustment or substitution of parts.
  • the a 'tatin member or diaphragm is made o insu ating'material and contacts with resistance varying (material contained in depressionsor cups formed at the junction ⁇ and insulating material.
  • the terminals of the ltransmitter are preferably secured to 'these-.,.electrodes Dueto this construction it is not 'necessary to attach leads to the agitating member or diaphragm, thereby 4permittin .the diaphragm to move more ac f' curately 1n accordance with its impressed,
  • Fig. 1 1s a front assembly view of the transmltter with a portion-of the mouth piece and the diaphragm partially cut away and Fig. 2 is a sectional view thereof. Similar reference characters refer -to similar parts throughout the several views.
  • This transmitter generally consists of a casing 10 .which may be of non-conducting material and Ain which concentricallyv arranged metallic electrodes 11 "and '12 are sei. cured by means of a number of screws such .as 15 and 16 ⁇ shown in Fig. 2.
  • the electrodes 1 1 and 12 are insulated from each other by means of a ring 13 in-l terposed between the ⁇ linner and outer electrodes and which may be made of any sort 'of well known insulating material such as mica or hard rubber. These electrodes areinsillated from casing -10 by means of an insulating disc 14. Screws 16 are each pro- ⁇ vided for fastening the wire terminals- 17 -and 18 of the electrodes and are insulated from.
  • casing .10 by means; of insulating trodes 11 and v12 and insulating ring 13 are eachl provided with a number of registering recesses adapted to form a plurality of preferably semi-spherical shaped cups 21, 22, etc., which are each adapted to be filled with carbon granules as'shown in Fig. 2.
  • a diaphragm 23 which may be of any suitable non-conducting material. This diaphragm is held ⁇ in adjusted position in contact with the carbon granules in.,A cups 21 -22etc., by means of the mouth piece 24 which is preferably made of-insulating material andvscrewed on the threaded ridge 25 of casing 10.
  • a structure comprising immovable concentric conducting sections separated 'by insulation and ture at the point of junction of said sections and insulation, a resistance varying medi- -m in said depressions for bridging said insli-lation, and an agitating member of insulating material directly in contact with said resistance varying medium and spaced.
  • the combi nation In a telephone transmitter, the combi nation -with acasing, a plurality of concentricall disposed immovable electrodes arange in said casing, an insulating rlng 1nbushings 19 and 20 respectively.
  • said fastening means being CHARLES R. MOORE.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrotherapy Devices (AREA)

Description

Ama 12, 1927. l 1,624,352
C. R. MOORE 'TELEPHONE TRANSMITTER File'd April 22. 1924 readily i point of a number of `immovable electrodes Patented Apr.` l2, 1927.
Y' UNITI-:D STATI-:s
PATENT ",oFFlcE.
CHARLES B. MOORE,1 OF.WYOHING, NEW JERSEY, ASSIGNOB T0 WESTERN ELECTRIC COMPANY, INCORPORATED, 02E-'NEW YORK, N. Y., A CORPORATION 0F NEW YORK.
- TELEPHONE p'raansnrrrnn.
application mea April 22, im. serial Nq. 708,116.
- Thisinvention relates to microphone' transmitters, .and more particularly to a type'adapted for use Ain combination with a sensitivereceiver` for the purpose of aiding deaf. persons to hear.
The ob]ect is' to provide-.anI instrument of this character which will be simple, compact, cheap. to manufacture and efficient in use,'h'a ving comparatively few parts which are assembled in such a manner as to be accessible for purpose of repair, adjustment or substitution of parts.
In accordance with thisinvention, the a 'tatin member or diaphragm is made o insu ating'material and contacts with resistance varying (material contained in depressionsor cups formed at the junction` and insulating material. The terminals of the ltransmitter are preferably secured to 'these-.,.electrodes Dueto this construction it is not 'necessary to attach leads to the agitating member or diaphragm, thereby 4permittin .the diaphragm to move more ac f' curately 1n accordance with its impressed,
frequencies. Referring to the drawings, Fig. 1 1s a front assembly view of the transmltter with a portion-of the mouth piece and the diaphragm partially cut away and Fig. 2 is a sectional view thereof. Similar reference characters refer -to similar parts throughout the several views.
This transmitter generally consists of a casing 10 .which may be of non-conducting material and Ain which concentricallyv arranged metallic electrodes 11 "and '12 are sei. cured by means of a number of screws such .as 15 and 16` shown in Fig. 2.
-, The electrodes 1 1 and 12 are insulated from each other by means of a ring 13 in-l terposed between the` linner and outer electrodes and which may be made of any sort 'of well known insulating material such as mica or hard rubber. These electrodes areinsillated from casing -10 by means of an insulating disc 14. Screws 16 are each pro-` vided for fastening the wire terminals- 17 -and 18 of the electrodes and are insulated from. casing .10 by means; of insulating trodes 11 and v12 and insulating ring 13 are eachl provided with a number of registering recesses adapted to form a plurality of preferably semi-spherical shaped cups 21, 22, etc., which are each adapted to be filled with carbon granules as'shown in Fig. 2.
On the edge ofcasing 10 and parallelto the plane surface of the electrodes there is .mounted a diaphragm 23 which may be of any suitable non-conducting material. This diaphragm is held `in adjusted position in contact with the carbon granules in.,A cups 21 -22etc., by means of the mouth piece 24 which is preferably made of-insulating material andvscrewed on the threaded ridge 25 of casing 10.
What is claimed is:
1. In'a telephone transmitter, a structure comprising immovable concentric conducting sections separated 'by insulation and ture at the point of junction of said sections and insulation, a resistance varying medi- -m in said depressions for bridging said insli-lation, and an agitating member of insulating material directly in contact with said resistance varying medium and spaced.
'junction point,. carbon' granules in said material cups, a diaphragm of insulatin directly in contactwith .the car on granules and spaced fromboth-electrodesand a terminalmountedA on each electrode.u
'having ldepressions formed in said struc- 4.- In a telephone transmitter, the combi nation -with acasing, a plurality of concentricall disposed immovable electrodes arange in said casing, an insulating rlng 1nbushings 19 and 20 respectively. The elec-4 l rposedbetween said electrodes, said eleci trodes. and ring forming depressions at insulated from said casing and serving as their ]unct1on oints, a reslstance varying terminals.l medmm 1n sal depresslons for bridging In Wltncss whereof, I' hereunto subscribe 10 said insulating ring, a disc associated with my name this 16th day of Api-i1 A. D., 1924. said electrodes, and fastening means pass- .1924.
ing through said casing und disc and ipto A said electrodes, said fastening means being CHARLES R. MOORE.
US708116A 1924-04-22 1924-04-22 Telephone transmitter Expired - Lifetime US1624352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US708116A US1624352A (en) 1924-04-22 1924-04-22 Telephone transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US708116A US1624352A (en) 1924-04-22 1924-04-22 Telephone transmitter

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US1624352A true US1624352A (en) 1927-04-12

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