US3628241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a wound core and apparatus therefor
Assignee: Hitachi Ltd
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Filing: 1970-04-28
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Granted: 1971-12-21
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Expires: 1990-04-28
Abstract
Abstract A magnetic steel strip is continuously fed into a cutting device which cuts the steel strip into a prescribed length. The cutting device is operated in response to a first metering device which meters the length of the magnetic steel strip to be cut, and cuts the steel strip into the prescribed length successively utilizing a compulsory hump forming device disposed at the feed-out side of the cutting device without stopping the feed of the magnetic steel strip. The cut magnetic steel strips are transferred to a feed-out device and further to a continuous winding device. By the winding device the cut magnetic steel strips are wound into a wound core in which the seam positions are overlapped by a prescribed length.
Inventors
- 👤 Kozo Toyoda
- 👤 Katutosi Akatu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:37
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/0206; H01F41/0233; H01F41/024; H01F27/00; H01F27/24; H01F27/245; H01F27/2455; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
212 words
Method of making a wound core comprising the steps of feeding a hoop-shaped magnetic steel strip rotatably supported by a supporting means continuously into a cutting means provided with a cutter which cuts said strip into prescribed length of pieces of magnetic steel, said cutting means being operated in response to the output of a first metering means which meters the length of said strip fed into said cutting means, cutting said magnetic steel strip continuously into the prescribed length of pieces of magnetic steel by means of said cutter without stopping the feeding of said strip utilizing a hump of said strip formed by a hump forming means, said hump forming means being provided on the downstream of said cutting means and forming a hump in said magnetic strip before the cutting operation of said cutting means and releasing said hump formed at the beginning of cutting operation and moving back to form a hump again at the end of cutting operation, feeding the pieces cut out of said magnetic strip into a continuous winding means by means of a feed-out means, and winding said pieces of magnetic steel by said continuous winding means so that the seam positions between the adjacent pieces may be out of alignment with one another.
Claim 2
Dependent Claim
212 words
Method of making a wound core comprising the steps of feeding a hoop-shaped magnetic steel strip rotatably supported by a supporting means continuously into a cutting means provided with a cutter which cuts said strip into prescribed length of pieces of magnetic steel, said cutting means being operated in response to the output of a first metering means which meters the length of said strip fed into said cutting means, cutting said magnetic steel strip continuously into the prescribed length of pieces of magnetic steel by means of said cutter without stopping the feeding of said strip utilizing a hump of said strip formed by a hump forming means, said hump forming means being provided on the downstream of said cutting means and forming a hump in said magnetic strip before the cutting operation of said cutting means and releasing said hump formed at the beginning of cutting operation and moving back to form a hump again at the end of cutting operation, feeding the pieces cut out of said magnetic strip into a continuous winding means by means of a feed-out means, and winding said pieces of magnetic steel by said continuous winding means so that the seam positions between the adjacent pieces may be out of alignment with one another.
Claim 3
Dependent Claim
57 words
Method of making a wound core as defined in claim 1 wherein the winding speed of said continuous winding means is made slightly higher than the feeding speed of said feed out means so that the seam positions between the pieces of magnetic steel may be out of alignment with one another by the difference in speed.
Claim 4
Dependent Claim
51 words
Method of making a wound core as defined in claim 1 wherein said cutter in the cutting means is made to cut said strip in the different length so that the difference in length may arraNge said pieces in said wound core in the arrangement out of alignment with one another.
Claim 5
Dependent Claim
210 words
Apparatus for making a wound core comprising a. a supporting means for rotatably supporting a hoop-shaped magnetic steel strip, b. a feed in means for continuously feeding said magnetic steel strip, c. a first metering means for metering the length of said magnetic steel strip fed by said feed-in means, d. a cutting means including a cutter for cutting said magnetic steel strip into the prescribed length in response to the output of said metering means, e. a compulsory hump forming means disposed at the downstream of said cutting means for forming a prescribed hump in said magnetic steel strip, e''. said compulsory hump forming means forming a prescribed hump normally in the magnetic steel strip before being cut, releasing the hump at the beginning of the cutting operation, and moving back to form a hump again at the end of the cutting operation so that said magnetic steel strip may be continuously cut into the prescribed length of pieces, f. a feed-out means for feeding the cut pieces of magnetic steel cut by said cutter of the cutting means, and g. a continuous winding means for winding said pieces of magnetic steel into a core wherein the seam positions between the pieces are out of alignment with one another.
Claim 6
Dependent Claim
210 words
Apparatus for making a wound core comprising a. a supporting means for rotatably supporting a hoop-shaped magnetic steel strip, b. a feed in means for continuously feeding said magnetic steel strip, c. a first metering means for metering the length of said magnetic steel strip fed by said feed-in means, d. a cutting means including a cutter for cutting said magnetic steel strip into the prescribed length in response to the output of said metering means, e. a compulsory hump forming means disposed at the downstream of said cutting means for forming a prescribed hump in said magnetic steel strip, e''. said compulsory hump forming means forming a prescribed hump normally in the magnetic steel strip before being cut, releasing the hump at the beginning of the cutting operation, and moving back to form a hump again at the end of the cutting operation so that said magnetic steel strip may be continuously cut into the prescribed length of pieces, f. a feed-out means for feeding the cut pieces of magnetic steel cut by said cutter of the cutting means, and g. a continuous winding means for winding said pieces of magnetic steel into a core wherein the seam positions between the pieces are out of alignment with one another.
Claim 7
Dependent Claim
48 words
Apparatus for making a wound core as defined in claim 4 wherein a common power source is disposed for driving said feed-in means, said feed-out means and said continuous winding means, and a clutch is disposed for connecting the driving shafts of said feed-in means and feed-out means.
Claim 8
Dependent Claim
44 words
Apparatus for making a wound core as defined in claim 4 wherein two independent power sources are disposed for respectively driving said feed-in means and said feed-out and winding means, and a clutch is disposed for connecting said feed-in means and said feed-out means.
Claim 9
Dependent Claim
40 words
Apparatus for making a wound core as defined in claim 4 wherein said first metering means comprises a metering roller rotating in contact with said magnetic steel strip and a meter of pulse generator type connected with said metering roller.
Claim 10
Dependent Claim
101 words
Apparatus for making a wound core as defined in claim 4 wherein said cutting means comprising a holder for holding said cutter, a supporting member for supporting a guide by which said holder is guided up and down, a cutter driving means for operating said cutter secured to said holder, a first and a second lever interlocking said cutter driving means with said holder in said guide for transmitting the movement of said cutter driving means to said cutter, and an auxiliary driving means for moving said cutter up and down after the cutting operation through said first and second levers.
Claim 11
Dependent Claim
48 words
Apparatus for making a wound core as defined in claim 4 wherein said cutter in said cutting means has thickness enough to cut off the magnetic steel strip of the length required to make the seam positions in the wound core be out of alignment with one another.
Claim 12
Dependent Claim
56 words
Apparatus for making a wound core as defined in claim 4 wherein a steel strip guide means is disposed at the upstream of said cutting means for letting the magnetic steel strip be humped when said cutting means is operated to cut said strip and feeding forward said strip when said cutting means finished cutting operation.
Claim 13
Dependent Claim
62 words
Apparatus for making a wound core as defined in claim 4 wherein said compulsory hump forming means comprises a couple of hump forming members one of which has a positively curved surface and the other of which has a negatively curved surface and a driving means for moving at least said hump forming member having a positively curved surface up and down.
Claim 14
Dependent Claim
114 words
Apparatus for making a wound core as defined in claim 4 wherein said continuous winding means comprises a rotatable and movable spool, a plurality of pulleys disposed around said spool, an endless belt running around said pulleys and along almost all the periphery of said spool except the portion to reCeive said pieces of magnetic steel to be wound thereon, said belt being made to vary the diameter of the loop thereof around said spool, and a tension exerting means for exerting tension on said endless belt, whereby said endless belt is driven by at least one of said pulleys and said spool is made to rotate to wind said pieces of magnetic steel.
References Cited (Backward Citations)
US3223955A
Cited
US3362066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |