US3710478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush replacement device
Assignee: General Electric Co
•
Filing: 1971-03-25
•
Granted: 1973-01-16
•
Expires: 1991-03-25
Abstract
Abstract A brush replacement device for a dynamoelectric machine comprising a brush holder and a removable handle which is keyed to the brush holder. The brush holder is locked to a bus bar supported about the periphery of a collector ring. The removable handle is inserted into the brush holder and turned to unlock the brush holder from the bus bar. This motion simultaneously activates a spring means which secures a brush in the brush holder while it is being withdrawn or inserted about the periphery of the collector ring.
Inventors
- 👤 G Krulls
- 👤 W Ruth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/41; H01R39/415; H01R39/383; H01R43/00; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53143; Y10T29/53274
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
In a dynamoelectric machine of the type having a rotating collector ring and a plurality of brushes mounted on a stationary bus bar adjacent said collector ring, a brush replacement device comprising: a brush holder having a brush slidably positioned therein and having means biasing said brush against said collector ring, an insulated handle removably inserted into said brush holder, a rod rotatably fitted within the brush holder and adapted to be rotated by said handle to release the brush holder from the bus bar, and a spring means mounted in said brush holder and arranged to be actuated by rotation of said rod so that said spring means may bear against said brush to secure it in said brush holder when the brush holder is released from the bus bar.
Claim 2
Dependent Claim
131 words
In a dynamoelectric machine of the type having a rotating collector ring and a plurality of brushes mounted on a stationary bus bar adjacent said collector ring, a brush replacement device comprising: a brush holder having a brush slidably positioned therein and having means biasing said brush against said collector ring, an insulated handle removably inserted into said brush holder, a rod rotatably fitted within the brush holder and adapted to be rotated by said handle to release the brush holder from the bus bar, and a spring means mounted in said brush holder and arranged to be actuated by rotation of said rod so that said spring means may bear against said brush to secure it in said brush holder when the brush holder is released from the bus bar.
Claim 3
Dependent Claim
50 words
The brush replacement device as recited in claim 1, wherein said spring means comprises a leaf spring and wherein the lower portion of said rotatable rod defines a cam portion which may alternately bear against the leaf spring for securing a brush during removal and replacement of the brush holder.
Claim 4
Dependent Claim
52 words
The brush replacement device as recited in claim 1, wherein said brush holder includes resilient fingers grasping said bus bar and electrically connected to said brush, and wherein said rod includes locking means cooperating with the bus bar to alternately lock or release the brush holder therefrom when the rod is rotated.
Claim 5
Dependent Claim
34 words
The brush replacement device as recited in claim 3 wherein said locking means comprises a locking pin extending from the lower portion of the rod for locking the brush holder onto the bus bar.
Claim 6
Dependent Claim
150 words
A brush replacement device, for use in a dynamoelectric machine of the type having a rotating collector ring, and a plurality of brushes supported from a stationary bus bar positioned adjacent said collector ring, comprising: a brush holder having a brush slidably positioned therein and having means biasing said brush against said collector ring, an insulated handle removably inserted into said brush holder, a rod rotatably fitted within said brush holder and adapted to be rotated by said handle, a spring means mounted in said brush holder and arranged to be actuated by rotation of said rod so that said spring means may bear against said brush to secure it in said brush holder, and a locking pin mounted on said rod for engaging said bus bar, whereby rotation of the handle causes the rod to rotate, thereby freeing the brush holder and securing the brush in the brush holder.
Claim 7
Dependent Claim
150 words
A brush replacement device, for use in a dynamoelectric machine of the type having a rotating collector ring, and a plurality of brushes supported from a stationary bus bar positioned adjacent said collector ring, comprising: a brush holder having a brush slidably positioned therein and having means biasing said brush against said collector ring, an insulated handle removably inserted into said brush holder, a rod rotatably fitted within said brush holder and adapted to be rotated by said handle, a spring means mounted in said brush holder and arranged to be actuated by rotation of said rod so that said spring means may bear against said brush to secure it in said brush holder, and a locking pin mounted on said rod for engaging said bus bar, whereby rotation of the handle causes the rod to rotate, thereby freeing the brush holder and securing the brush in the brush holder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |