Patent US3618640A successfully refreshed from Google Patents.
US3618640A
Expired / Lapsed
US
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Magnetic shuttle drive for continuously progressing sheds in weaving looms
Assignee: Individual
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Filing: 1969-08-12
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Granted: 1971-11-09
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Expires: 1989-08-12
Abstract
Abstract The shuttle is supplied with permanent magnets having uniform spacing, and alternate poles; the travelling magnetic field is formed by a carrier holding a plurality of magnets of similar size and spacing to that of the magnets on the shuttle, so that, upon movement of the carrier, the shuttle will be carried along and attractive and repelling force components between shuttle and travelling field will cancel, and force components in the direction of the movement of the shuttle along the shuttle race will be additive.
Inventors
- 👤 Adolf Linka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:16
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/12; D03D47/26; D03D47/262; D03D47/266
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
193 words
Shuttle drive for continuously progressing shed-type weaving looms having a shuttle (1); a carrier (8) movable outside of the shed along the shuttle race (3) and in synchronism with desired shuttle movement and separated from the shuttle race by an airgap (11) a plurality of permanent magnets (5) having poles of alternate polarity located on the shuttle facing the carrier, the poles being of predetermined width (x) and being separated from each other by uniform spacing (y); and a plurality of permanent magnets (7) having poles of alternate polarity located on the carrier facing the shuttle to provide a travelling magnetic field, the poles being of said pole width (x) and spacing (y) and essentially similar to that of the shuttle, the relative magnetic field strengths provided by said magnetic means, and the width of the airgap (11) being set, with respect to each other, to provide attracting (12) and repelling (13) magnetic force interaction between adjacent fields of the shuttle and said travelling field and having force components (12b, 13b) in a direction of the shuttle movement which are additive to lock the shuttle to move in synchronism with said carrier (8).
Claim 2
Dependent Claim
193 words
Shuttle drive for continuously progressing shed-type weaving looms having a shuttle (1); a carrier (8) movable outside of the shed along the shuttle race (3) and in synchronism with desired shuttle movement and separated from the shuttle race by an airgap (11) a plurality of permanent magnets (5) having poles of alternate polarity located on the shuttle facing the carrier, the poles being of predetermined width (x) and being separated from each other by uniform spacing (y); and a plurality of permanent magnets (7) having poles of alternate polarity located on the carrier facing the shuttle to provide a travelling magnetic field, the poles being of said pole width (x) and spacing (y) and essentially similar to that of the shuttle, the relative magnetic field strengths provided by said magnetic means, and the width of the airgap (11) being set, with respect to each other, to provide attracting (12) and repelling (13) magnetic force interaction between adjacent fields of the shuttle and said travelling field and having force components (12b, 13b) in a direction of the shuttle movement which are additive to lock the shuttle to move in synchronism with said carrier (8).
Claim 3
Dependent Claim
74 words
Shuttle drive according to claim 1, wherein the shuttle travels over a shuttle race (3) and wherein the shuttle race is formed of nonmagnetic material, and the attracting (12a) and repelling (13a) force components between the magnets of the shuttle (5) and the magnets (7) of the carrier (8) are essentially equal and in opposite direction, so that force components exerted by the shuttle (1) against the shuttle race (3) will tend to cancel.
Claim 4
Dependent Claim
23 words
Shuttle drive according to claim 1, wherein the magnets (5) on the shuttle (1) are a plurality of adjacently located, spaced horseshoe-type magnets.
Claim 5
Dependent Claim
30 words
Shuttle drive according to claim 1, wherein the magnets (7) on the carrier (8) have pole surfaces (10) shaped to provide for concentration of the magnetic flux from said magnets.
Claim 6
Dependent Claim
28 words
Shuttle drive according to claim 1, wherein the permanent magnets (5) on the shuttle are a plurality of horseshoe-type magnets located at the side surface of the shuttle.
Claim 7
Dependent Claim
23 words
Shuttle drive according to claim 1, wherein the shuttle race has reed elements (3a); and the reed elements are formed of nonmagnetic material.
References Cited (Backward Citations)
GB189719745A
Cited
US2647542A
Cited
GB740578A
Cited
US2799295A
Cited
US3114398A
Cited
US3224465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |