Patent US3665576A successfully refreshed from Google Patents.
US3665576A
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Means for securing the coils of an electric machine in the slots of the iron body thereof and device for introducing the means in the slots
Assignee: BBC Brown Boveri AG Germany
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Filing: 1970-09-18
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Granted: 1972-05-30
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Expires: 1990-09-18
Abstract
Abstract Coils are secured in the slots of the iron body of an electric machine by means of cooperating wedges which are pressed or moved into place by fluid pump means or by mechanical means.
Inventors
- 👤 Harald Nordmann
- 👤 Kurt Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:29
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; H02K3/487; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
Means for securing the coils in the slots of the iron body of an electric machine, comprising at least one pair of cooperating wedges extending over at least a part of the length of the iron body for closing the slots, each of said pair of wedges comprising an upper prismatic body, the bottom surface of which is inclined in a longitudinal direction, and a lower prismatic body the upper surface of which faces the bottom inclined surface of said upper prismatic body and is inclined in the opposite direction relative to the slope of the bottom surface of the upper prismatic body.
Claim 2
Dependent Claim
103 words
Means for securing the coils in the slots of the iron body of an electric machine, comprising at least one pair of cooperating wedges extending over at least a part of the length of the iron body for closing the slots, each of said pair of wedges comprising an upper prismatic body, the bottom surface of which is inclined in a longitudinal direction, and a lower prismatic body the upper surface of which faces the bottom inclined surface of said upper prismatic body and is inclined in the opposite direction relative to the slope of the bottom surface of the upper prismatic body.
Claim 3
Dependent Claim
39 words
Means as claimed in claim 1 wherein the bottom surface of the upper prismatic body is provided with a recess inclined longitudinally therein, the upper surface of said lower prismatic body being received in said recess and guided therealong.
Claim 4
Dependent Claim
13 words
Means as claimed in claim 2, wherein the recess is produced by machining.
Claim 5
Dependent Claim
26 words
Means as claimed in claim 1, and further comprising a layer of hardenable casting resin disposed between the opposing surfaces of the two cooperating prismatic bodies.
Claim 6
Dependent Claim
67 words
A device for pressing together the at least one pair of cooperating wedges as claimed in claim 1 comprising a member acting on the end face of said lower prismatic body, means for actuating said member to drive said lower prismatic body into extended engagement with the bottom surface of said upper prismatic body, and adjustable cam means in the air vents for supporting said actuating means.
Claim 7
Dependent Claim
56 words
A device as claimed in claim 5 wherein said actuating means comprises a fluid pressure cylinder, a piston therein, a piston rod for actuating said member to act on the end face of said lower prismatic body and adjustable means projecting into and engaging the air vents of the electric machine for supporting said pressure cylinder.
Claim 8
Dependent Claim
41 words
A device as claimed in claim 6 and further comprising a line for feeding fluid under pressure to said pressure cylinder and a pressure valve in said line for controlling the flow of said fluid when a predetermined pressure is attained.
Claim 9
Dependent Claim
75 words
A device as claimed in claim 5 wherein said actuating means comprises a rack, a guide for said rack, a gear wheel meshing with said rack, a ratchet for driving said gear wheel, said member being arranged at one end of said rack to act on the end face of said lower prismatic body, and adjustable projections extending from said guide for engaging the air vents of the electric machine for supporting said actuating means.
Claim 10
Dependent Claim
33 words
Device according to claim 8, and further comprising a pinion over said ratchet and an adjustable slipping clutch acting on said pinion, said clutch controlling said pinion when a certain torque is exceeded.
Claim 11
Dependent Claim
12 words
A device as claimed in claim 5 wherein said member is L-shaped.
References Cited (Backward Citations)
US1402217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |