US238784A - Carbon contact for telephones - Google Patents
Carbon contact for telephones Download PDFInfo
- Publication number
- US238784A US238784A US238784DA US238784A US 238784 A US238784 A US 238784A US 238784D A US238784D A US 238784DA US 238784 A US238784 A US 238784A
- Authority
- US
- United States
- Prior art keywords
- carbon
- telephones
- contact
- carbon contact
- substance
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title description 36
- 229910052799 carbon Inorganic materials 0.000 title description 36
- 239000007788 liquid Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000001702 transmitter Effects 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000010775 animal oil Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000001419 dependent Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000002452 interceptive Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 230000028327 secretion Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
Definitions
- My invention relates to a method of treating the carbon button s or contacts of a batterytraiismitter with a view to eliminating, so far as may be, the crackling or sputtering noises that accompany the transmission of articulate sounds and interfere with the distinctness ot' the received articulations, and that are in all cases a source of annoyance.
- a carbon button treated in this way may be used in any form of batterytransmitter, and is applicable not only to those forms in which metallic electrodes are used in contact with the carbon, but also to those in which both contacts are of carbon.
- such non-conducting liquid is of a fatty or oily nature, as is ordinarily thecase,itactsto prevent the secretion or absorption of moisture by its repellent action, as well as by filling the pores or interstices of the button.
- This method of treating carbon buttons may obviously be applied to other resistance-contacts, which, by reason of their structural nature, may absorb or hold aqueous vapors or moisture; and I contemplate, therefore, applying the same treatment to resistance-pieces formed of finely-divided metals or conductors compacted into shape in any suitable manner, as well as to any other contact piece or resistance whose structure is in any degree porous.
Description
, currents, 83c.
UNITED STATES JOHN H. IRWIN, OF MORTON, PENNSYLVANIA.
CARBON CONTACT FOR TELEPHONES.
SPECIFICATION forming part of Letters Patent No. 238,784, dated March 15, 1881.
Application filed January .19, 1881.
To all whom it may concern:
Be it known thatI, JOHN H. IRWIN, of Morton, Delaware county, Pennsylvania, have invented a new and useful Improvement in Carbon Contacts and Buttonsfor'Telephone or Microphone Transmitters, of which the following is a specification.
My invention relates to a method of treating the carbon button s or contacts of a batterytraiismitter with a view to eliminating, so far as may be, the crackling or sputtering noises that accompany the transmission of articulate sounds and interfere with the distinctness ot' the received articulations, and that are in all cases a source of annoyance. These foreign and disturbing sounds have been attributed to many causes, such as disturbance in the electrical conditions of the atmosphere, earth- My observations and experiments have led me to believe that they are in large measure due, where battery or contact transmitters are used, to the electrical decomposition of aqueous vapor or moisture, which, by reason of the structural nature of the carbon, is present in its pores or interstices, to a greater or less degree dependent upon the hygrometric condition of the surrounding atmosphere, and that the disturbing cause-is, in fact, the sudden liberation of constituent gases by electrolysis.
In order to remove this source of annoyance and confusion in the reception of the transmitted sounds, I have conceived the idea of moistening or saturating the carbon with a liquid or material not readily decomposable by the action of the electric current, but WlllGll will exclude aqueous vapor or mo1sture from the body or pores of the carbon without interfering with its proper action as a tensionchanger. To accomplish this ob ect I moisten or saturate the ca l on with a non-conducting liquid or substance, such as petroleum ormineral hydrocarbon, animal or vegetable oils or r narafiine. l ya ioiis methods may be adopted tor applyin g the non conducting substance. Where such substance is a liquid 1t 1s snnply necessary to heat the carbon to a sufficlent degree to expel any aqueous moisture, and then ap- (No model.)
ply the liquid by pouring it over the carbon, or by dipping the carbon into it.
I have obtained excellent results by the application ot'ordinary petroleum. It is, ot'course, desirable in all cases that the non-conducting substance should be as free as possible from acids, or any material that would be readily decomposable, or would attack the metallic contact-points ordinarily used in conjunction with carbon buttons. A carbon button treated in this way may be used in any form of batterytransmitter, and is applicable not only to those forms in which metallic electrodes are used in contact with the carbon, but also to those in which both contacts are of carbon. \V hen such non-conducting liquid is of a fatty or oily nature, as is ordinarily thecase,itactsto prevent the secretion or absorption of moisture by its repellent action, as well as by filling the pores or interstices of the button.
This method of treating carbon buttons may obviously be applied to other resistance-contacts, which, by reason of their structural nature, may absorb or hold aqueous vapors or moisture; and I contemplate, therefore, applying the same treatment to resistance-pieces formed of finely-divided metals or conductors compacted into shape in any suitable manner, as well as to any other contact piece or resistance whose structure is in any degree porous.
As an additional result flowing from the use of a carbon contact treated in the manner above described, I have-found that the point of the metallic electrode is less liable to become oxidized, and that theinstrument is more DRAFTSMAN constant in its action and less liable to get out of adjustment.
I do notwish to be understood as limiting myself to the particular non-conductingdiq; .7
contact treated or saturated with a non-con- 4. A carbon resistance-piece moistened 0r ducting substance or ltYiiiET. saturated with petroleum, substantiullyns and to a) v 1 J. I A catiitn jgnttcn 01 contact IGblhtflHCO to! the DHIPO-SO dencubed. moistened 01' treated \vitiifirmm cfi'imficting .1. H. IRWIN. 5 substanccoriiquithau-bstantial1yasdescribctl. Witnesses:
3. A carbon i c's (3611i cc moistened or II. (J. TOWNSEND,
trcatcd'Wit-h a 11511fticiu'bcii iiqnid or sub- JOHN J. DIFFLEY.
stance.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US238784A true US238784A (en) | 1881-03-15 |
Family
ID=2308135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US238784D Expired - Lifetime US238784A (en) | Carbon contact for telephones |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US238784A (en) |
-
0
- US US238784D patent/US238784A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US238784A (en) | Carbon contact for telephones | |
| GB797944A (en) | Improvements in or relating to the production of carbon electrodes | |
| US3310433A (en) | Ceramic article coated with silver containing oxygen and method of making same | |
| Puri et al. | 932. Fixation of bromine from aqueous solution by outgassed charcoals | |
| GB1032519A (en) | An electric two-layer sintered contact body having high resistance to welding | |
| DE2240814C3 (en) | Gas detection element | |
| US1899016A (en) | Dehydrating rubber deposited from aqueous dispersions | |
| GB526212A (en) | Improvements in or relating to telephone transmitters | |
| US839306A (en) | Electric cigar-lighter. | |
| GB467190A (en) | Improvements in or relating to electric potential sensitive devices | |
| GB1092271A (en) | Improvements relating to electrode structures for electrochemical systems | |
| US1557092A (en) | Deoxygenation of inclosed atmosphere | |
| US2843127A (en) | Apparatus for electro-anesthesia by means of contact electricity | |
| US905402A (en) | Method of removing carbon from metallic filaments. | |
| US530021A (en) | Method of electrically heating metal | |
| US2439114A (en) | Electrical apparatus collector conditioning | |
| JPS6243528B2 (en) | ||
| Chakrapani et al. | Electrochemical Charge Transfer to Diamond | |
| US2454584A (en) | Hygrometer | |
| KR910008160A (en) | Surface Treatment of Steel | |
| GB387427A (en) | Improvements in and relating to hard metal compositions | |
| Macklen | Investigation of the electrical contact properties of granular carbon aggregates | |
| Rozova et al. | The adsorption of oxygen on germanium stimulated by a strong electrical field | |
| USRE9484E (en) | John l | |
| GB367790A (en) | Improvements in or relating to electric negative resistances |