US580434A - Telephone-transmitter - Google Patents
Telephone-transmitter Download PDFInfo
- Publication number
- US580434A US580434A US580434DA US580434A US 580434 A US580434 A US 580434A US 580434D A US580434D A US 580434DA US 580434 A US580434 A US 580434A
- Authority
- US
- United States
- Prior art keywords
- sheet
- gauze
- diaphragm
- transmitter
- granules
- 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
Links
- 239000008187 granular material Substances 0.000 description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 26
- 229910052799 carbon Inorganic materials 0.000 description 26
- 239000004020 conductor Substances 0.000 description 10
- 230000036633 rest Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000001702 transmitter Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000000284 resting Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 2
Images
Classifications
-
- 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
- H04R21/021—Microphones with granular resistance material
Definitions
- Our invention relates to a telephone-transmitter, our object being to provide an improved form of transmitter of the granularcarbon type which can be manufactured at small cost and which will effectively maintain the granular carbon in a separated and sensitive condition.
- a sheet containing fine openings or meshes preferably wire-gauze, against which the granular carbon rests and by means of which it is separated and kept in adivided condition.
- a sheet of gauze against which the granular carbon rests is provided upon the stationary electrode. I11 an intermediate position between the two sheets of gauze above mentioned is placed a gauze sheet the openings in which are quite coarse, permitting the passage of the granules of carbon, thus constantly agitating the granules as the diaphragm vibrates to prevent packing and to maintain the granules in a separated and highly-sensitive condition.
- FIG. 1 is a sectional view of the transmitter.
- Fig. 2 is a view of the diaphragm.
- Figs. 3 and 4 are views of the coarse-mesh gauze.
- Figs. 5 and 6 are views of the sheet of gauze mounted upon the stationary electrode.
- Fig. 7 is a view of the separatingring.
- Figs. 8 and 9 are views of the ring which holds the gauze in place.
- the sheet a of wire-gauze or similar material provided with fine meshes or openings.
- a sheet I) of wire-gauze having fine meshes Upon the rear face of the diaphragm a is mounted the sheet a of wire-gauze or similar material provided with fine meshes or openings.
- a sheet I) of wire-gauze having fine meshes Upon the rear face of the stationary electrode b rests a sheet I) of wire-gauze having fine meshes, and in front of the sheet I) rests the sheet 0 of wire-gauze having meshes of considerable size to permit the passage of the granules of carbon through the openings.
- the ring 6 carries a flange 6, upon which is mounted a ringf of plush, the soft fibers of which rest against the sheet of gauze a upon the diaphragm and prevent the escape of the carbon granules.
- the carbon granules restagainst the sheets of fine gauze upon the diaphragm and the stationary electrode, and the irregularities of the surfaces agitate the granules as the diaphragm is vibrated, thus preventing the granules from packing and maintaining the same in a highly-sensitive condition.
- the diaphragm vibrates the granules are caused to pass through the coarse openings of the sheet 0, thus further assisting in dividing the granules and preventing packing.
- the sheets a" and c are electrically connected with the sta tionary electrode, while the sheet Z) is electrically connected with the diaphragm, and as the granules are forced against the gauze sheets a more perfect electrical contact is secured than when pressed against a fiat surface.
- a telephone-transmitter the combination with the diaphragm, of the sheet of gauze mounted upon the rear face thereof the stationary electrode, the sheet of gauze mounted upon the face thereof, the sheet of coarse gauze, the ring separating the same from the sheet mounted upon the electrode, said sheet of coarse gauze having a rim encircling said electrode, a ring clamping said rim to the electrode and provided with a flange, and a ring of plush, or similar material between said fiange and the diaphragm, substantially as described.
- a telephone-transmitter the combination with a diaphragm, of a sheet of conducting material provided With fine openings or meshes mounted upon the rear face thereof, and granular carbon resting in contact with said sheet whereby the granules engage the meshes of the sheet to effect a good electric contact and the granules are agitated to prevent packing, substantially as described.
- a telephone-transmitter the combination with a diaphragm, of a sheet of conducting material provided with fine openings or meshes mounted upon the rear face thereof, a sheet of conducting material provided with fine openings or meshes mounted opposite the sheet upon said diaphragm, and granular carbon between said sheets,whereby the granules are agitated to prevent packing, substantially as described.
- a telephone-transmitter the combination with a diaphragm, of a sheet of conducting material provided With fine openings or meshes mounted upon the rear face thereof, a stationary sheet of conducting material provided with fine openings or meshes, granular carbon between said sheets, and a sheet of material having openings or meshes and situated between said first-mentioned sheets, substantially as described.
Description
' (No Model.)
A. STROMBERG 8a A. GARLSON.
TELEPHONE TRANSMITTER.
N0.'580,434. Patented Apr. 13, 1897.
[nzrenTbrsz fllfrea SZ'FOmBQ q UeLTZSOH.
saw
rrn STATES A'rnNr much.
TELEPHONE-TRANSMITTER.
SPECIFICATION forming part of Letters Patent No. 580,434, dated April 13, 1897.
Application filed November 9, 1896. Serial No. 611,482. (No model.)
To all whom it may concern:
Be it known that we, ALFRED STROMBERG and ANDROV CARLSON, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Telephone-Transmitters, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.
Our invention relates to a telephone-transmitter, our object being to provide an improved form of transmitter of the granularcarbon type which can be manufactured at small cost and which will effectively maintain the granular carbon in a separated and sensitive condition.
In accordance with our invention we mount upon the rear face of the diaphragm a sheet containing fine openings or meshes, preferably wire-gauze, against which the granular carbon rests and by means of which it is separated and kept in adivided condition. Likewise upon the stationary electrode is provided a sheet of gauze against which the granular carbon rests. I11 an intermediate position between the two sheets of gauze above mentioned is placed a gauze sheet the openings in which are quite coarse, permitting the passage of the granules of carbon, thus constantly agitating the granules as the diaphragm vibrates to prevent packing and to maintain the granules in a separated and highly-sensitive condition.
WVe have illustrated our invention in the accompanying drawings, in which- Figure 1 is a sectional view of the transmitter. Fig. 2 is a view of the diaphragm. Figs. 3 and 4 are views of the coarse-mesh gauze. Figs. 5 and 6 are views of the sheet of gauze mounted upon the stationary electrode. Fig. 7 is a view of the separatingring. Figs. 8 and 9 are views of the ring which holds the gauze in place.
Like letters refer to like parts in the several figures.
Upon the rear face of the diaphragm a is mounted the sheet a of wire-gauze or similar material provided with fine meshes or openings. Against the face of the stationary electrode b rests a sheet I) of wire-gauze having fine meshes, and in front of the sheet I) rests the sheet 0 of wire-gauze having meshes of considerable size to permit the passage of the granules of carbon through the openings. Between the sheets I) and c is interposed a ring 61, and the sheet 0 is provided with a rim 0, which fits over the electrode b and is surrounded by a ring 6, which clamps the rim of the sheet 0 in position. The ring 6 carries a flange 6, upon which is mounted a ringf of plush, the soft fibers of which rest against the sheet of gauze a upon the diaphragm and prevent the escape of the carbon granules. The carbon granules restagainst the sheets of fine gauze upon the diaphragm and the stationary electrode, and the irregularities of the surfaces agitate the granules as the diaphragm is vibrated, thus preventing the granules from packing and maintaining the same in a highly-sensitive condition. As the diaphragm vibrates the granules are caused to pass through the coarse openings of the sheet 0, thus further assisting in dividing the granules and preventing packing. The sheets a" and c are electrically connected with the sta tionary electrode, while the sheet Z) is electrically connected with the diaphragm, and as the granules are forced against the gauze sheets a more perfect electrical contact is secured than when pressed against a fiat surface.
Having described our invention, what we claim as new, and desire to secure by Letters Patent, is-
1. In a telephone-transmitter, the combination with the diaphragm, of the sheet of gauze mounted upon the rear face thereof the stationary electrode, the sheet of gauze mounted upon the face thereof, the sheet of coarse gauze, the ring separating the same from the sheet mounted upon the electrode, said sheet of coarse gauze having a rim encircling said electrode, a ring clamping said rim to the electrode and provided with a flange, and a ring of plush, or similar material between said fiange and the diaphragm, substantially as described.
2. In a telephone-transmitter, the combination with a diaphragm, of a sheet of wiregauze mounted upon the rear face thereof, and granular carbon resting in contact with said gauze whereby the granules engaging the meshes of the gauze effect a good electrical contact, and the gauze agitates the granules to prevent packing, substantially as described.
3. In a telephone-transmitter, the combination With a diaphragm of a sheet of Wiregauze mounted upon the rear face thereof, a sheet of wire-gauze mounted opposite the sheet of gauze upon said diaphragm, and granular carbon between said sheets of gauze, substantially as described.
4. In a telephone-transmitter, the combination with a diaphragm, of a sheet of wiregauze mounted upon the rear face thereof, a stationary sheet of wire-gauze, granular car bon between said sheets, and a sheet of wiregauze having coarse meshes and situated between said first-mentioned sheets, substantially as and for the purpose set forth.
5. In a telephone-transmitter, the combination with a diaphragm, of a sheet of conducting material provided With fine openings or meshes mounted upon the rear face thereof, and granular carbon resting in contact with said sheet whereby the granules engage the meshes of the sheet to effect a good electric contact and the granules are agitated to prevent packing, substantially as described.
6. In a telephone-transmitter, the combination with a diaphragm, of a sheet of conducting material provided with fine openings or meshes mounted upon the rear face thereof, a sheet of conducting material provided with fine openings or meshes mounted opposite the sheet upon said diaphragm, and granular carbon between said sheets,whereby the granules are agitated to prevent packing, substantially as described.
7. In a telephone-transmitter, the combination with a diaphragm, of a sheet of conducting material provided With fine openings or meshes mounted upon the rear face thereof, a stationary sheet of conducting material provided with fine openings or meshes, granular carbon between said sheets, and a sheet of material having openings or meshes and situated between said first-mentioned sheets, substantially as described.
In witness whereof We have hereunto subscribed our names in the presence of two wit- DGSSGS.
ALFRED STROMBERG. ANDROV OARLSON. \Vitnesses:
W. CLYDE J ONES, EDWARD E. RIoN.
Publications (1)
Publication Number | Publication Date |
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US580434A true US580434A (en) | 1897-04-13 |
Family
ID=2649112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US580434D Expired - Lifetime US580434A (en) | Telephone-transmitter |
Country Status (1)
Country | Link |
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US (1) | US580434A (en) |
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0
- US US580434D patent/US580434A/en not_active Expired - Lifetime
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