US281904A - John m - Google Patents
John m Download PDFInfo
- Publication number
- US281904A US281904A US281904DA US281904A US 281904 A US281904 A US 281904A US 281904D A US281904D A US 281904DA US 281904 A US281904 A US 281904A
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- United States
- Prior art keywords
- machine
- plugs
- coils
- dynamo
- commutator
- 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
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- 206010022114 Injury Diseases 0.000 description 2
- 241000276498 Pollachius virens Species 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- 201000002372 amelogenesis imperfecta type 1G Diseases 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920001601 polyetherimide Polymers 0.000 description 2
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
Definitions
- My invention relates to a method of preventing destruction of dynamo-machines or electric generators by reason of accidental shortcircuiting within the machine itself, which is an accident which has frequently occurred, and by which many machines have been greatly injured.
- My invention consists in interposing in circuit within the machine a fusible plug of such a nature as that if there be an accidental closed circuit formed upon the commutator neither the armature-coils nor the field-magnet coils will be destroyed.
- My invention is distinguished from the fusible plugs heretofore employed by the circum stance that those plugs will not prevent the destruction of the machine by short-circuiting within itself.
- a A A A represent the field-magnet coils, C Othe armature-coils, of the Brush machine. These coils are connected in the usual way with the commutator-brushes F F F F.
- I interpose fusible plugs 13 B B B which may be of the form shown in Fig. 2. I also, preferably, cause the wires leading from the armature to pass through. a re- ,ly understood.
- I taining-ring preferably of insulated material
- ring I have marked D in Fig. 1.
- This retaining- 5 The combination of a dynamo or magneto machine with one or more fusible plugs interposed in the circuit of said machine between the field-magnet and a brush connected with the commutator, substantially as described.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Dc Machiner (AREA)
Description
(No Model.)
J. M. McMAHAN.
DYNAMO AND MAGNETO ELECTRIC MACHINE. No. 281,904. Patented July 24, 1883.
.1! A V//// I 8D z 2 N. PEI'ERS. FhOQD-Lvthugriphul. Wnminglon. D. C.
UNITED STATES PATENT OFFICE.
JOHN M. MOMAHAN, OF JERSEY CITY, NEW JERSEY.
DYNAMO AND MAGNETO ELECTRIC MACHINE.
SPECIFICATION forming part of Letters Patent No. 281,904, dated July 24, 1883.
Application filed April 9, 1883. (No model.) I
To all whom it may concern.-
Be it known that I, J OHN M.McMA1-1AN, of Jersey City, New Jersey, have invented a new anduseful Improvement in Dynamo and Magneto Machines and Motors, of which the following is a full, true, and exact description, reference being had to the accompanying draw lngs.
My invention relates to a method of preventing destruction of dynamo-machines or electric generators by reason of accidental shortcircuiting within the machine itself, which is an accident which has frequently occurred, and by which many machines have been greatly injured.
My invention consists in interposing in circuit within the machine a fusible plug of such a nature as that if there be an accidental closed circuit formed upon the commutator neither the armature-coils nor the field-magnet coils will be destroyed.
My invention is distinguished from the fusible plugs heretofore employed by the circum stance that those plugs will not prevent the destruction of the machine by short-circuiting within itself.
-My invention will be readily understood from the accompanying drawings, in which Figure 1 represents a Brush machine with my invention applied, and Fig. 2 illustrates the method of application of the fusible plug.
A A A A represent the field-magnet coils, C Othe armature-coils, of the Brush machine. These coils are connected in the usual way with the commutator-brushes F F F F. In the circuits between the brushes and the fieldmagnet coils, and between the commutator and the armature-coils, I interpose fusible plugs 13 B B B, which may be of the form shown in Fig. 2. I also, preferably, cause the wires leading from the armature to pass through. a re- ,ly understood.
I taining-ring, preferably of insulated material,
or similar device, which will preventtheir flying outward and injuring the machine when released by the fusible plug. ring I have marked D in Fig. 1.
The operation of my apparatus will be readi- The plugs are so made as to fuse before injury is done to the coils of the machine, and if it should happen that ashort circuit were made between the sections of the commutator at any time, or the apparatus were otherwise internally short-circuited, the immediate melting of the plugs would prevent the otherwise unavoidable destruction of the machine.
It is obvious that my plugs could be arranged in many different places within the machine without departing from my invention, and, also, that they are applicable to other forms of machine beside that known as the Brush machine.
I am aware that fusible plugs have before now been employed in electric circuits, and I do not claim, generally, such use but What I claim as my invention, and desire to secure by Letters Patent, is-
1. The combination of a dynamo .or magneto machine with one or more fusible plugs interposed in the circuit of said machine between the armature and the commutator, substantially as described.
This retaining- 5 2. The combination of a dynamo or magneto machine with one or more fusible plugs interposed in the circuit of said machine between the field-magnet and a brush connected with the commutator, substantially as described.
JOHN M. MCMAHAN.
. Vitnesscs:
Gno. I-I. EVANS, \VM. PoLLocK.
Publications (1)
Publication Number | Publication Date |
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US281904A true US281904A (en) | 1883-07-24 |
Family
ID=2351114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US281904D Expired - Lifetime US281904A (en) | John m |
Country Status (1)
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3030531A (en) * | 1958-08-01 | 1962-04-17 | Westinghouse Electric Corp | Protective means for rotating electrical device |
US6008555A (en) * | 1998-12-17 | 1999-12-28 | Garr; Keith E. | Electric motor and a method for making an electric motor |
-
0
- US US281904D patent/US281904A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3030531A (en) * | 1958-08-01 | 1962-04-17 | Westinghouse Electric Corp | Protective means for rotating electrical device |
US6008555A (en) * | 1998-12-17 | 1999-12-28 | Garr; Keith E. | Electric motor and a method for making an electric motor |
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