US3769535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical current collecting devices
Assignee: National Research Development Corp UK
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Filing: 1971-11-19
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Granted: 1973-10-30
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Expires: 1991-11-19
Abstract
Abstract An electrical current-collecting device for passing high currents between relatively fast moving conductors is in the form of a circular brush having projecting conducting bristles and mounted on a spindle about which it is rotated with the bristles in contact with a moving conductor so that the relative speed between the conductor and the bristles is relatively small and good electrical conduction is achieved. The current may then be passed on to a second, normally stationary, conductor through the spindle made of conducting material and much smaller in diameter than the brush so that contact with the second conductor can be made at relatively low speed.
Inventors
- 👤 J Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:52
CPC Classifications
H; H01; H01R; H01R39/00; B; B60; B60L; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
An electrical device comprising first and second conductors at least the first of which is movable, and means for conducting an electrical current between said conductors comprising at least one circular brush having a plurality of projecting conducting bristles and having driving means wherein said circular brush is driven with the ends of the bristles in electrical contact with said first conductor at such a speed that the relative velocity between the free ends of the bristles and the first conductor is small compared with the rate of movement of the first conductor and having contact means for making an electrical connection with said second conductor.
Claim 2
Dependent Claim
106 words
An electrical device comprising first and second conductors at least the first of which is movable, and means for conducting an electrical current between said conductors comprising at least one circular brush having a plurality of projecting conducting bristles and having driving means wherein said circular brush is driven with the ends of the bristles in electrical contact with said first conductor at such a speed that the relative velocity between the free ends of the bristles and the first conductor is small compared with the rate of movement of the first conductor and having contact means for making an electrical connection with said second conductor.
Claim 3
Dependent Claim
40 words
An electrical device according to claim 1 in which any circular brush is mounted on a conducting spindle of substantially smaller diameter than the brush, the spindle comprising the contact means for making electrical contact with the said second conductor.
Claim 4
Dependent Claim
51 words
An electrical device according to claim 2 in which a solid wheel type of current collector of diameter slightly less than the diameter across the outer ends of the bristles of the circular brush is mounted on the spindle and makes electrical contact with the same conductor as the circular brush.
Claim 5
Dependent Claim
25 words
An electrical device according to claim 1 in which any circular brush and the conductor with which it is in electrical contact are independently driven.
Claim 6
Dependent Claim
32 words
An electrical device according to claim 1 in which any circular brush is driven by mechanical gearing with the drive means of the conductor with which said circular brush is in contact.
Claim 7
Dependent Claim
28 words
An electrical device according to claim 1 in which the first conductor is grooved so as to drive positively the circular brush with which it is in contact.
Claim 8
Dependent Claim
22 words
An electrical device according to claim 1 in which between the first and second conductors there is at least one further device.
Claim 9
Dependent Claim
13 words
An electrical device according to claim 1 incorporated in a rotatable electrical machine.
Claim 10
Dependent Claim
42 words
An electrical device according to claim 1 in which the first and second conductors are each in contact with a circular brush having a plurality of projecting conducting bristles, whereby an electrical current can be conducted between said first and second conductors.
References Cited (Backward Citations)
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US1670030A
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US2785364A
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US3341726A
Cited
US3375479A
Cited
US3544868A
Cited
US3648088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |