US494629A - Commutator-brush for dynamos - Google Patents
Commutator-brush for dynamos Download PDFInfo
- Publication number
- US494629A US494629A US494629DA US494629A US 494629 A US494629 A US 494629A US 494629D A US494629D A US 494629DA US 494629 A US494629 A US 494629A
- Authority
- US
- United States
- Prior art keywords
- brush
- commutator
- dynamos
- copper gauze
- soda
- 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
- LTMHDMANZUZIPE-PUGKRICDSA-N Digoxin Chemical compound C1[C@H](O)[C@H](O)[C@@H](C)O[C@H]1O[C@@H]1[C@@H](C)O[C@@H](O[C@@H]2[C@H](O[C@@H](O[C@@H]3C[C@@H]4[C@]([C@@H]5[C@H]([C@]6(CC[C@@H]([C@@]6(C)[C@H](O)C5)C=5COC(=O)C=5)O)CC4)(C)CC3)C[C@@H]2O)C)C[C@@H]1O LTMHDMANZUZIPE-PUGKRICDSA-N 0.000 title description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 14
- 239000010949 copper Substances 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 8
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 206010022114 Injury Diseases 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/26—Solid sliding contacts, e.g. carbon brush
Definitions
- Figure l is a perspective broken away of my brush and Fig. 2 a plan of one of the copper gauze sheets broken off.
- the purpose of my invention generally stated is to devise a suitable binder for a commutator brush made from powdered carbon and copper gauze.
- a commutator brush of pulverized carbon and silicate of soda having sheets of copper gauze interspersed therein.
Landscapes
- Motor Or Generator Current Collectors (AREA)
Description
(No Model.) D W DUN A GOMMUTATOR BRUSH FOR DYNMIGS.v
Patented Apr. 4, 1893.
with s s sf s:
W7/MM /v r/ UNITED STATES PATENT OFFICE.
DAVID W. DUNN, OF PITTSBURG, PENNSYLVANIA.
COMMUTATOR-BRUSH FOR DYNAMOS.
SPECIFICATION forming part of Letters Patent No. 494,629, dated April 4, 1893. Application filed August 13, 1892. Serial No. 442,944. (No'model.)
To @ZZ whom it may concern:
Be it known that I, DAVID W. DUNN, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered a new and useful Oornmutator-Brush for Dynamos, of which the following is a specification.
In the accompanying drawings which make part of this specication, Figure l, is a perspective broken away of my brush and Fig. 2 a plan of one of the copper gauze sheets broken off.
The purpose of my invention generally stated is to devise a suitable binder for a commutator brush made from powdered carbon and copper gauze.
Heretofore attempts have been made to manufacture a commutator brush by making a mixture of finely divided carbon and pitch and forming a block by pressing said mixture into the meshes of several layers of copper gauze. Before the block so resulting could be used it was necessary to dry out the pitch as it is a non-conductor. This operation necessitated a degree of heat which volatilized the copper gauze and thus rendered the whole manufacture a failure. I have discovered a binder in liquid silicate of soda which as itis itself a fair conductor, does not require the application of heat to be expelled and conscquently no injury results to the copper gauze.
In the practice of my invention I make a batch of pulverized carbon and liquid silicate of soda. Sheets a-ct of copper gauze cut bias so as to present the ends of the wire to the rubbing contact, are then cut of the size of the proposed brush. These sheets are then spread with the mixture b, of carbon and silicate of soda, and the Whole put in a mold and compacted under great pressure. The block resulting is then laid by and dried out, when it is ready to use.
A commutator brush of pulverized carbon and silicate of soda having sheets of copper gauze interspersed therein.
In testimony whereof I have hereunto set my hand this 9th day of July, A. D. 1892.
DAVID IV. DUNN. Witnesses:
`WILLIAM BEAL, WILLIAM L. PIERCE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US494629A true US494629A (en) | 1893-04-04 |
Family
ID=2563469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US494629D Expired - Lifetime US494629A (en) | Commutator-brush for dynamos |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US494629A (en) |
-
0
- US US494629D patent/US494629A/en not_active Expired - Lifetime
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