US495561A - Buchanan stewart paterson - Google Patents
Buchanan stewart paterson Download PDFInfo
- Publication number
- US495561A US495561A US495561DA US495561A US 495561 A US495561 A US 495561A US 495561D A US495561D A US 495561DA US 495561 A US495561 A US 495561A
- Authority
- US
- United States
- Prior art keywords
- commutator
- paterson
- mica
- buchanan
- strips
- 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
- 239000010445 mica Substances 0.000 description 26
- 229910052618 mica group Inorganic materials 0.000 description 26
- 239000002184 metal Substances 0.000 description 10
- 230000000875 corresponding Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 241000208195 Buxaceae Species 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000007779 soft material 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
- H01R39/04—Commutators
Definitions
- My invention has reference to the construction of commutators for dynamo electric machines.
- the strips of mica now commonly employed to insulate longitudinally the metal strips of commutators are usually keyed together by lipped flanges and rings, between which and the various strips there are interposed layers of comparatively soft material such as asbestos, boxwood, vulcanized fiber, or compressed paper; consequently any sections of the commutator receiving an accidental blow have been liable to become sunk below the circumference of the commutator.
- This has been found to occur for instance when putting armatures into machines where no proper lifting means have existed; if under these circumstances the armature has happened to be slung by the commutator, the great weight of the core has sometimes been sufficient to force the segments out of truth.
- the materials ordinarily employed as above set forth are all liable to change form and to contract by heating; conseqnentiy, although by proper baking in an oven the insulation resistance could be made very high, it would drop enormously as the result of exposure to
- annular grooves are formed in the flange and ring on the commutator core or body between which the metal strips and insulating strips of the commutator are arranged; in the ends of the annulus of strips corresponding grooves are formed, and in these grooves are inserted keys made of mica; and in order that others skilled in the art to which my invention pertains may be enabled to make and use the same I pro ceed to explain the manner of carrying it into practical effect by reference to the accompa nying drawings, wherein- Figure l is a view half in end elevation and half in cross section of a commutator according to my invention. Fig. 2 is a part central longitudinal section of same. Fig. 3 is a view corresponding to Fig. l, but illustrating a modification in which the mica key is composed of strips arranged circumferentially.
- a is the commutator core or body; I) the flange thereof, formed with an annular groove in its inner face as shown.
- 0 is the ring formed with a like annular groove.
- d d are the metal strips and e e the insulating strips arranged on the commutator body; the ends of the compound annulus composed of these strips being formed as shown each with an annular groove so as to form with the grooves in the flange and ring key ways to receive the mica keysff.
- Figs. 1 and 2 theyare shown composed of rectangular pieces of mica placed radially in the key ways; but a key may be made of strips of mica placed circumferentially as in Fig. 3.
- washers g are also made of mica.
- Commutators constructed with mica keys as described will be found exceedingly strong and even able to resist blows without the solidity of the mica being seriously affected; furthermore the construction described presents manufacturing facilities and affords high insulation resistance even when the commutator is damp.
- a commutator for dynamo electric machines or motors, constructed with key ways and with keys of mica arranged within said key ways, substantially as described.
- a commutator for a dynamo electric machine or motor constructed with key ways and with keys composed of pieces of mica placed radially within said key ways.
- a commutator for a dynamo electric machine or motor comprising a flange and a ring on the commutator core body both formed with annular grooves metal strips and insuname to this specification in the presence of lating strips arranged between said flange and two subscribing witnesses.
Landscapes
- Motor Or Generator Current Collectors (AREA)
Description
(No Model.)
. B. S. PATERSON. OOMMUTATOR FOR DYNAMO ELECTRIC MACHINES 0R MOTORS. No. 495,561.
Patented Apr. 18, 1893.
UNITED- STATES PATENT OFFICE.
BUCHANAN STEIVART PATERSON, OF GATESHEAD, ENGLAND, ASSIGNOR TO CLARKE, CHAPMAN d7 CO., OF SAME PLACE.
COMMUTATOR FOR DYNAMO-ELECTRIC MACHINES OR MOTORS.
SPECIFICATION forming part of Letters Patent No. 495561, dated April 18, 1893.
Application filed August 16, 1892. Serial No.44 3,2'7'7- (N0 model.) Patented in England April 14,1892, No. 7,237, and in France August 13, 1892,1Io. 225,066-
To (0% whom it may concern.-
Be it known that I, BUCHANAN STEWART PATERsoN, a subject of the Queen of Great Britain and Ireland, residing at Gatesheadon-Tyne, in the county of Durham, England, have invented Improvements in Commutators for Dynamo-Electric Machines or Motors, (for which Letters Patent of Great Britain,
No. 7,237, dated April let, 1892, and of France,
No. 225,066, dated August 13, 1892, were granted to me and John Brokenshire Furneaux,) of which the following is a specification.
My invention has reference to the construction of commutators for dynamo electric machines. The strips of mica now commonly employed to insulate longitudinally the metal strips of commutators are usually keyed together by lipped flanges and rings, between which and the various strips there are interposed layers of comparatively soft material such as asbestos, boxwood, vulcanized fiber, or compressed paper; consequently any sections of the commutator receiving an accidental blow have been liable to become sunk below the circumference of the commutator. This has been found to occur for instance when putting armatures into machines where no proper lifting means have existed; if under these circumstances the armature has happened to be slung by the commutator, the great weight of the core has sometimes been sufficient to force the segments out of truth. Furthermore the materials ordinarily employed as above set forth are all liable to change form and to contract by heating; conseqnentiy, although by proper baking in an oven the insulation resistance could be made very high, it would drop enormously as the result of exposure to moisture.
Now in order to obviate the evils above indicated according to my invention annular grooves are formed in the flange and ring on the commutator core or body between which the metal strips and insulating strips of the commutator are arranged; in the ends of the annulus of strips corresponding grooves are formed, and in these grooves are inserted keys made of mica; and in order that others skilled in the art to which my invention pertains may be enabled to make and use the same I pro ceed to explain the manner of carrying it into practical effect by reference to the accompa nying drawings, wherein- Figure l is a view half in end elevation and half in cross section of a commutator according to my invention. Fig. 2 is a part central longitudinal section of same. Fig. 3 is a view corresponding to Fig. l, but illustrating a modification in which the mica key is composed of strips arranged circumferentially.
a is the commutator core or body; I) the flange thereof, formed with an annular groove in its inner face as shown.
0 is the ring formed with a like annular groove.
d d are the metal strips and e e the insulating strips arranged on the commutator body; the ends of the compound annulus composed of these strips being formed as shown each with an annular groove so as to form with the grooves in the flange and ring key ways to receive the mica keysff. In Figs. 1 and 2 theyare shown composed of rectangular pieces of mica placed radially in the key ways; but a key may be made of strips of mica placed circumferentially as in Fig. 3. Between the ends of the commutator strips (metal and mica) and the flange and ring are interposed washers g that are also made of mica.
Commutators constructed with mica keys as described will be found exceedingly strong and even able to resist blows without the solidity of the mica being seriously affected; furthermore the construction described presents manufacturing facilities and affords high insulation resistance even when the commutator is damp.
That I claim is- 1. A commutator, for dynamo electric machines or motors, constructed with key ways and with keys of mica arranged within said key ways, substantially as described.
2. A commutator for a dynamo electric machine or motor constructed with key ways and with keys composed of pieces of mica placed radially within said key ways.
3. A commutator for a dynamo electric machine or motor comprising a flange and a ring on the commutator core body both formed with annular grooves metal strips and insuname to this specification in the presence of lating strips arranged between said flange and two subscribing witnesses.
ring and made with corresponding grooves, BUCHANAN STEWART PATERSON. thus forming key ways, and annular keys WVitnesses: 5 composed of pieces of mica placed radially ALFRED LINDSAY FORS'IER,
within said key Ways substantially as de- 28 Uocttsworth Road, Gateshead-on-Tyne. scribed for the purpose specified. JAMES MOLEOD,
In testimony whereof I have signed my 110 [Itgh West Street, Gateshead-mtTyne.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US495561A true US495561A (en) | 1893-04-18 |
Family
ID=2564399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US495561D Expired - Lifetime US495561A (en) | Buchanan stewart paterson |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US495561A (en) |
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0
- US US495561D patent/US495561A/en not_active Expired - Lifetime
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