US524173A - Variable-resistance medium for telephones - Google Patents
Variable-resistance medium for telephones Download PDFInfo
- Publication number
- US524173A US524173A US524173DA US524173A US 524173 A US524173 A US 524173A US 524173D A US524173D A US 524173DA US 524173 A US524173 A US 524173A
- Authority
- US
- United States
- Prior art keywords
- variable
- telephones
- resistance medium
- silicon
- potassium
- 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
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 8
- 229910052700 potassium Inorganic materials 0.000 description 8
- 239000011591 potassium Substances 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 235000007575 Calluna vulgaris Nutrition 0.000 description 2
- 206010015150 Erythema Diseases 0.000 description 2
- 241000353097 Molva molva Species 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000001702 transmitter Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
- C01B33/027—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material
- C01B33/033—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material by reduction of silicon halides or halosilanes with a metal or a metallic alloy as the only reducing agents
Definitions
- VARIABLE-RESlSTANCE MEDIUM FOR TELEPHONQES VARIABLE-RESlSTANCE MEDIUM FOR TELEPHONQES.
- the invention consists in an electric and process by which the same is produced.
- the said process consists in reducing a. salt of silicon by heatingit with sodium or potassium and again heating the product to a white a heat in the absence of air.
- the product thus obtained is a granular electric and microphonic silicon suitable to be used as av variable resistance medium between electrodes in battery telephones of the'Hunnings or granular type.
- a microphonic element composed of silicon havingelectrical conductivity.
Description
1 UNITED STATES PATENT ()FFICE.
WILLIAM JACQUES, OF NEWTON, ASSIGNOR TO .THE AMERICAN BELL microphonic silicon and .in the TELEPHONE COMPANY, OF BOSTON, MASSACHUSETTS.
VARIABLE-RESlSTANCE MEDIUM FOR TELEPHONQES.
SPECIFICATION forn ling part of Letters Patent No. 524,173, dated. August 7, 1894.
Application filed May 14, 1894:. Serial No. 511,240. 1 (N0 specimens.)
To all whom, it may concern.-
Be it known that 1, WILLIAM W. JAC ES, of Newton, in the State of Massachusetts, have invented a new and useful Variable-Resistance Medium for Battery-Telephone Transmitters, of which the following'is a specifi-- cation.
The invention consists in an electric and process by which the same is produced.
The said process consists in reducing a. salt of silicon by heatingit with sodium or potassium and again heating the product to a white a heat in the absence of air.
I mix fiuorsilicate of potassium with metallicsodium or potassium in proper proportions to reducethe flnorsilicate of potassium. Themixture .is then heated to redness in a closed iron retort. After the reaction has taken place the product is treated first with cold andcthen with hot water and filtered. The residue,
consisting of amorphous silicon, is then-heated to a reddish white heat in a closed vessel from which the air is excluded. The product thus obtained is a granular electric and microphonic silicon suitable to be used as av variable resistance medium between electrodes in battery telephones of the'Hunnings or granular type.
' I claiml. A microphonic element composed of silicon havingelectrical conductivity.
. 2. The herein described process of produc- Witnesses:
WILLIA W. SWAN, WILLIAM SULLIVAN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US524173A true US524173A (en) | 1894-08-07 |
Family
ID=2592968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US524173D Expired - Lifetime US524173A (en) | Variable-resistance medium for telephones |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US524173A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2697136A (en) * | 1951-04-28 | 1954-12-14 | Bell Telephone Labor Inc | Microphone and microphone granules |
| US4102767A (en) * | 1977-04-14 | 1978-07-25 | Westinghouse Electric Corp. | Arc heater method for the production of single crystal silicon |
| US4102765A (en) * | 1977-01-06 | 1978-07-25 | Westinghouse Electric Corp. | Arc heater production of silicon involving alkali or alkaline-earth metals |
| US4529576A (en) * | 1982-12-27 | 1985-07-16 | Sri International | Process and apparatus for obtaining silicon from fluosilicic acid |
| US4584181A (en) * | 1982-12-27 | 1986-04-22 | Sri International | Process and apparatus for obtaining silicon from fluosilicic acid |
-
0
- US US524173D patent/US524173A/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2697136A (en) * | 1951-04-28 | 1954-12-14 | Bell Telephone Labor Inc | Microphone and microphone granules |
| US4102765A (en) * | 1977-01-06 | 1978-07-25 | Westinghouse Electric Corp. | Arc heater production of silicon involving alkali or alkaline-earth metals |
| US4102767A (en) * | 1977-04-14 | 1978-07-25 | Westinghouse Electric Corp. | Arc heater method for the production of single crystal silicon |
| US4529576A (en) * | 1982-12-27 | 1985-07-16 | Sri International | Process and apparatus for obtaining silicon from fluosilicic acid |
| US4584181A (en) * | 1982-12-27 | 1986-04-22 | Sri International | Process and apparatus for obtaining silicon from fluosilicic acid |
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