GB1593348A - Device for winding a material onto a bobbin - Google Patents
Device for winding a material onto a bobbin Download PDFInfo
- Publication number
- GB1593348A GB1593348A GB13540/78A GB1354078A GB1593348A GB 1593348 A GB1593348 A GB 1593348A GB 13540/78 A GB13540/78 A GB 13540/78A GB 1354078 A GB1354078 A GB 1354078A GB 1593348 A GB1593348 A GB 1593348A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bobbin
- shutter
- rotor
- arm
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004804 winding Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 title claims description 49
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000003780 insertion Methods 0.000 claims description 14
- 230000037431 insertion Effects 0.000 claims description 14
- 230000005291 magnetic effect Effects 0.000 claims description 9
- 239000000696 magnetic material Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000012811 non-conductive material Substances 0.000 claims 1
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/005—Means compensating the yarn tension in relation with its moving due to traversing arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
- B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
- B65H59/385—Regulating winding speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
- H02K49/046—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with an axial airgap
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/09—Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Power Engineering (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
- Unwinding Of Filamentary Materials (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The drive motor comprises a rotary body (4) and an armature (5). The rotary body (4) is provided with permanent magnets on the end face near its circumference. The armature (5) is arranged coaxially at a distance from the rotary body (4). The armature (5) contains ferromagnetic material. The rotary body (4) and the armature (5) are arranged at a fixed axial distance from one another. At least one pivoting part (17) can be introduced into the axial gap between the rotary body (4) and the armature (5). The pivoting part (17) consists at least partially of ferromagnetic material and is connected to a roller (21) mounted on the thread-detector dancing arm (20). A variation in the winding speed without a relative axial displacement of the drive motor and bobbin is thereby possible. <IMAGE>
Description
(54) A DEVICE FOR WINDING A MATERIAL
ONTO A BOBBIN
(71) We, STARLINGER & CO.
GESELLSCHAFT M.B.H., an Austrian
Company, of Sonnenuhrgasse 4, A-1060
Vienna, Austria, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The invention relates to a device for winding a flexible material such as threador tape-shaped materials e.g. filament, yarn, twine, foil or tape onto a bobbin, and m particular to a device including a drivable rotor having at least one and preferably a plurality of permanent magnets and a rotatable bobbin support spaced axially apart from the rotor and including magnetic material in sufficiently close proximity to the rotor as to enable rotation of the rotor to cause rotation of the bobbin support.
Efficient devices for winding material are required to wind up all the material supplied as quickly as possible. Since the volume of material supplied often fluctuates, the working rate of the winding device must be variable.
Various devices of this type are known.
By rotation of the rotor provided with the permanent magnets, a magnetic field is generated and the bobbin support is carried along. Variation of the operating rate is effected by changing the width of the gap.
However, this entails an axially displaceable mounting of the driving motor or the bobbin, which is elaborate and expensive.
With a device of the present invention it is possible to achieve a change in the winding rate in a simple manner.
According to the invention there is provided a bobbin-winding device which includes
a rotor including at least one permanent magnet,
a rotatable bobbin support supporting the bobbin and axially spaced from the rotor to provide an axial gap therebetween and including magnetic material in sufficiently close proximity to the rotor as to enable rotation of the rotor to cause rotation of the bobbin support,
a shutter capable of insertion into the gap to thereby shield the said magnetic material of the bobbin support at least partially from the magnetic field of the or each permanent magnet and thereby control the rotational speed of the bobbin caused by rotation of the rotor, and
a shutter control capable of controlling the extent of insertion of the shutter into the gap in dependence upon at least one of the tension of the material being wound and the external diameter of the material wind on the bobbin to thereby control the rotational speed of the bobbin caused by rotation of the rotor.
Preferably the bobbin support includes a shaft in axial alignment with the rotor and the shaft and rotor preferably have respective radially extending flanges at mutually facing respective axial ends, the flange of the rotor carrying a plurality of circumferentially spaced apart permanent magnets and the flange on the shaft carrying the magnet material.
By insertion of the shutter into the axial gap between the rotor provided with the permanent magnets and the bobbin support, part of the magnetic field induced is deflected or part of the field is shielded.
According to the extent of insertion, the speed of the bobbin support and thus the winding rate is raised or lowered.
The shutter control is preferably a twoarmed lever which is pivotable at a fulcrum between the arms, one arm carrying the shutter so that pivotal movement of the arm causes insertion of the shutter into or removal of the shutter from the gap, and the other arm carrying a material guiding ele ment for contact with the material running onto the bobbin so that variation of at least one of the tension of the material and the diameter of the bobbin wind causes displacement of the thread guiding element and the said other arm thus causing pivotal movement of the said one arm and shutter carried thereby, the said extent of insertion of the shutter into the gap thereby being controlled in dependence upon at least one of the tension of the material and the diameter of the bobbin wind. The material guiding element is conveniently a roller rotatable about the said other arm which carries it.
For optimum adjustment of the winding rate to the speed of the incoming material it is practical to pivotably mount the twoarmed lever about a stationary axis essentially parallel to the axis of the rotor or bobbin, with the shutter being mounted on the said arm of the lever and the roller being rotatably mounted on the said other, preferably cranked, arm of the lever.
The two-armed lever may be advantageously connected, by at least one elastic element, preferably a tension spring, to a fixed member, for example, a frame carrying a drive for the rotor, with the elastic element preferably being connected to the said other arm of the lever carrying the roller, and, in particular, preferably connected at a point on the arm spaced from the roller. The two-armed lever may also be mounted on the frame carrying the drive for the rotor.
A device embodying the invention is explained in more detail hereinafter with reference to the accompanying drawings in which:
Figure I shows a longitudinal sectional view of a device according to the invention,
Figure 2 shows a sectional view along line II-II in Figure 1, Figure 3 shows a view of a rotor of the device of Figure 1 provided with permanent magnets and
Figure 4 shows an alternative form of rotor to that shown in Figure 3.
The device shown in Figures 1 and 2 compriscs a driving motor capable of driving a rotor including a shaft 2 and a disk-shaped member 4 including a radially extending flange the disk-shaped member 4 being keyed to an axial end of the shaft 2 by means of a key 3. Coaxial with and spaced from the shaft 2 is a bobbin support including a shaft 9 and a disk-shaped member 5 including a radially extending flange, the disk-shaped member 5 being keyed to an axial end of the shaft 9 adjacent to the axial end of the rotor shaft 2 by means of a key 6.
The bobbin support extends through an aperture in a plate 7 forming part of a frame carrying the driving motor 1. roller bearings being provided within the aperture to enable rotation of the bobbin support. The shaft 9 carries a bobbin 10, coaxial with the shaft 9, for winding material 12 such as filament, yarn, twine, foil tape or the like, the bobbin 10 being attached to an axial end of the shaft remote from the rotor by means of screws (not shown in detail) passing through mutually facing flanges on the shaft 9 and bobbin 10 respectively. The diskshaped member 4 of the rotor consists of light metal. preferably aluminium, and is provided, on the flange thereof, with a circular ring 11 of ferromagnetic material.
The ring 11 is inserted into a circumferentially extending groove or recess provided in the outer circumference of the flange. Extending from an axial end face of the rotor flange, facing the flange of the disk-shaped member 5 of the bobbin support, are rodshaped permanent magnets 15. The permanent magnets 15 are equidistant from the axis of the rotor and are circumferentially spaced apart from one another. The free axial ends of the permanent magnets 15 are arranged in such a manner that viewed from the front face of the disk-shaped member 4, south and north poles alternate with one another (Figure 3). However as shown in
Figure 4, it is also possible to provide small,
U-shaped permanent magnets 15 arranged spatially one adjacent to the other. The disk-shaped member 5 of the bobbin support also consists of light metal, preferably aluminium, and is also provided, on the flange thereof opposing the rotor flange, with an annular insert 16 of ferromagnetic material embedded within a circumferentially extending groove or recess provided in the outer circumference of the flange. It is essential, with this construction that at least that face of the insert 16 facing the rotor be completely covered by the material of the flange.
Respective axial ends of the rotor and bobbin support are provided by respective flanges of the respective disk-shaped members 4 and 5 thereof and are arranged at a fixed axial distance from one another. A shutter 17 is insertable into the gap between the rotor and the bobbin support. The shutter 17 includes, or may consist entirely of, ferromagnetic material and is attached to one arm 19 of a two-armed lever 18 whose other arm 20 is cranked and carries a roller 21 for guiding the material to be wound up.
The roller 21 is partly encircled by a loop of the material 12 and a rotating motion is imparted to it by frictional contact with this material. At the same time, the roller, depending upon the thread tension or the respective winding diameter on the bobbin, is pivotally moved. The lever 18 is pivoted about an axis which is essentially parallel to the axis of the bobbin 10; for this purpose, a bearing 22 is provided in a small hole through the plate 7. The arm 20 carrying the roller 21 is connected to the plate 7 by means of a spring 23 so as to bias the arm 20 to a predetermined position.
The device as illustrated operates as follows:
A magnetic field is generated by the rotating motion of the rotor provided with the permanent magnets 15. An eddy current is generated in the bobbin support, thus imparting a rotating motion to this also.
This bobbin support supports the bobbin 10 and winds up the material on the bobbin.
Depending upon the volume of material supplied or the rate at which the material is supplied, the shutter 17 is inserted more or less into the gap between rotor and bobbin support, whereby a corresponding part of the magnetic field is deflected or shielded, so that the rotational speed of the bobbin is adjusted in dependence upon the volume of supply or the rate at which the material is supplied.
The driving motor used can be a conventional polyphase induction motor, and this provides a sturdy device. The shutter 17 can take the form of a plate, and can include any one or more of an arcuate surface, a hollow portion, a plurality of apertures and a plurality of perforations. In this way, the characteristics and thus the effect of the shutter can be changed. A similar effect can be achieved by providing the shutter with inserts and/or reinforcements of nonconducting material, for instance plastics material. It is also possible to provide a shutter consisting of at least one supporting layer of light metal or plastics material and at least one layer of ferromagnetic material, preferably in the manner of a laminated plate, the ferromagnetic material preferably being coated on the supporting layer.
The roller controlling the movement of the shutter is preferably arranged in such a manner that its axis is essentially parallel to the axis of rotation of the bobbin. The roller may be replaced by another type of threadguiding element.
WHAT WE CLAIM IS:
1. A bobbin-winding device includes
a rotor including at least one permanent magnet,
a rotatable bobbin support supporting the bobbin and axially spaced from the rotor to provide an axial gap therebetween and including magnetic material in sufficiently close proximity to the rotor as to enable rotation of the rotor to cause rotation of the bobbin support,
a shutter capable of insertion into the gap to thereby shield the said magnetic material of the bobbin support at least partially from the magnetic field of the or each permanent magnet and thereby control the rotational speed of the bobbin caused by rotation of the rotor, and
a shutter control capable of controlling the extent of insertion of the shutter into the gap in dependence upon at least one of the tension of the material being wound and the external diameter of the material wind on the bobbin to thereby control the rotational speed of the bobbin caused by rotation of the rotor.
2. A device according to claim 1, wherein the bobbin support includes a shaft in axial alignment with the rotor.
3. A device according to claim 2, wherein the rotor and the shaft have respective radially extending flanges at mutually facing respective axial ends, the flange of the rotor carrying a plurality of circumferentially spaced apart permanent magnets and the flange of the shaft carrying the magnetic material.
4. A device according to claim 1, claim 2 or claim 3, wherein the shutter control is a two-armed lever which is pivotable at a fulcrum between the arms, one arm carrying the shutter so that pivotal movement of the arm causes insertion of the shutter into or removal of the shutter from the gap, and the other arm carrying a material guiding element for contact with the material running onto the bobbin so that variation of at least one of the tension of the material and the diameter of the bobbin wind causes displacement of the thread guiding element and the said other arm thus causing pivotal movement of the said one arm and shutter carried thereby, the said extent of insertion of the shutter into the gap thereby being controlled in dependence upon at least one of the tension of the material and the diameter of the bobbin wind.
5. A device according to claim 3, wherein the material guiding element is a roller rotatable relative to the said other arm.
6. A device according to claim 5, which additionally includes a frame carrying a drive for rotation of the rotor.
7. A device according to claim 6, wherein the fulcrum is attached to the said frame.
8. A device according to claim 5, claim 6 or claim 7, wherein the said two-armed lever is biased to a predetermined position by at least one elastic element connecting one of the arms thereof to a fixed member.
9. A device according to claim 8 having one said elastic element which connects the said other arm to the fixed member.
10. A device according to claim 9 wherein the elastic element is a spring.
11. A device according to claim 8, claim 9 or claim 10 as appendant to claim 6, wherein the fixed member is the frame carrying the drive for rotation of the rotor.
12. A device according to any one of the preceding claims, wherein the shutter is
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (16)
1. A bobbin-winding device includes
a rotor including at least one permanent magnet,
a rotatable bobbin support supporting the bobbin and axially spaced from the rotor to provide an axial gap therebetween and including magnetic material in sufficiently close proximity to the rotor as to enable rotation of the rotor to cause rotation of the bobbin support,
a shutter capable of insertion into the gap to thereby shield the said magnetic material of the bobbin support at least partially from the magnetic field of the or each permanent magnet and thereby control the rotational speed of the bobbin caused by rotation of the rotor, and
a shutter control capable of controlling the extent of insertion of the shutter into the gap in dependence upon at least one of the tension of the material being wound and the external diameter of the material wind on the bobbin to thereby control the rotational speed of the bobbin caused by rotation of the rotor.
2. A device according to claim 1, wherein the bobbin support includes a shaft in axial alignment with the rotor.
3. A device according to claim 2, wherein the rotor and the shaft have respective radially extending flanges at mutually facing respective axial ends, the flange of the rotor carrying a plurality of circumferentially spaced apart permanent magnets and the flange of the shaft carrying the magnetic material.
4. A device according to claim 1, claim 2 or claim 3, wherein the shutter control is a two-armed lever which is pivotable at a fulcrum between the arms, one arm carrying the shutter so that pivotal movement of the arm causes insertion of the shutter into or removal of the shutter from the gap, and the other arm carrying a material guiding element for contact with the material running onto the bobbin so that variation of at least one of the tension of the material and the diameter of the bobbin wind causes displacement of the thread guiding element and the said other arm thus causing pivotal movement of the said one arm and shutter carried thereby, the said extent of insertion of the shutter into the gap thereby being controlled in dependence upon at least one of the tension of the material and the diameter of the bobbin wind.
5. A device according to claim 3, wherein the material guiding element is a roller rotatable relative to the said other arm.
6. A device according to claim 5, which additionally includes a frame carrying a drive for rotation of the rotor.
7. A device according to claim 6, wherein the fulcrum is attached to the said frame.
8. A device according to claim 5, claim 6 or claim 7, wherein the said two-armed lever is biased to a predetermined position by at least one elastic element connecting one of the arms thereof to a fixed member.
9. A device according to claim 8 having one said elastic element which connects the said other arm to the fixed member.
10. A device according to claim 9 wherein the elastic element is a spring.
11. A device according to claim 8, claim 9 or claim 10 as appendant to claim 6, wherein the fixed member is the frame carrying the drive for rotation of the rotor.
12. A device according to any one of the preceding claims, wherein the shutter is
provided with at least one of an arcuate surface, a hollow portion, a plurality of apertures and a plurality of perforations.
13. A device according to any one of the preceding claims, wherein the shutter is of laminate construction and includes at least one layer of ferromagnetic material and at least one layer of non-conductive material.
14. A device according to claim 14, wherein the said at least one layer of non-conducting material is of plastics material.
15. A device according to claim 13 or claim 14, wherein the said at least one layer of ferromagnetic material is a coating carried by the said at least one layer of non-conducting material.
16. A device according to any one of the preceding claims substantially as herein described and as illustrated with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT250777A AT360881B (en) | 1977-04-08 | 1977-04-08 | DRIVE DEVICE WITH THREAD TENSION CONTROL DEVICE FOR REWINDING THREAD OR TAPE-SHAPED MATERIAL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1593348A true GB1593348A (en) | 1981-07-15 |
Family
ID=3535517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13540/78A Expired GB1593348A (en) | 1977-04-08 | 1978-04-06 | Device for winding a material onto a bobbin |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS6048430B2 (en) |
| AT (1) | AT360881B (en) |
| CH (1) | CH628001A5 (en) |
| DE (1) | DE2814281A1 (en) |
| ES (1) | ES468635A1 (en) |
| FR (1) | FR2386469A1 (en) |
| GB (1) | GB1593348A (en) |
| IT (1) | IT1102455B (en) |
| PT (1) | PT67879B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138318A1 (en) * | 2007-05-14 | 2008-11-20 | Tridelta Magnetsysteme Gmbh | Device for taking up and unwinding a continuous material |
| WO2016029060A1 (en) * | 2014-08-20 | 2016-02-25 | Mcgowan John Lewis | Eddy current braking device for rotary systems |
| CN107265189A (en) * | 2017-07-19 | 2017-10-20 | 天津敏驰汽车部品有限公司 | Copper cash unreeling machine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59187664U (en) * | 1983-05-28 | 1984-12-12 | 田中電子工業株式会社 | Winding machine rotation drive device |
| DE3422637A1 (en) * | 1984-06-19 | 1985-12-19 | Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt | TEXTILE MACHINE WITH SEVERAL SPOOLS FOR WINDING A THREAD FEEDING AT A CONSTANT SPEED ON A CONICAL CROSS REEL |
| CH665823A5 (en) * | 1984-08-30 | 1988-06-15 | Huemer Franz Xaver | RINSING DEVICE. |
| DE10155763A1 (en) * | 2001-11-14 | 2003-05-22 | Rieter Ag Maschf | Traverse drive for yarn wind-up includes magnetic clutch that has no direct contact between opposing poles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL101141C (en) * | 1955-03-31 |
-
1977
- 1977-04-08 AT AT250777A patent/AT360881B/en not_active IP Right Cessation
-
1978
- 1978-04-03 DE DE19782814281 patent/DE2814281A1/en active Granted
- 1978-04-04 CH CH358678A patent/CH628001A5/en not_active IP Right Cessation
- 1978-04-06 IT IT48772/78A patent/IT1102455B/en active
- 1978-04-06 GB GB13540/78A patent/GB1593348A/en not_active Expired
- 1978-04-07 ES ES468635A patent/ES468635A1/en not_active Expired
- 1978-04-07 PT PT67879A patent/PT67879B/en unknown
- 1978-04-07 FR FR7810412A patent/FR2386469A1/en active Granted
- 1978-04-08 JP JP53041684A patent/JPS6048430B2/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138318A1 (en) * | 2007-05-14 | 2008-11-20 | Tridelta Magnetsysteme Gmbh | Device for taking up and unwinding a continuous material |
| WO2016029060A1 (en) * | 2014-08-20 | 2016-02-25 | Mcgowan John Lewis | Eddy current braking device for rotary systems |
| US10035421B2 (en) | 2014-08-20 | 2018-07-31 | Hi Tech Llc | Eddy current braking device for linear systems |
| US10532662B2 (en) | 2014-08-20 | 2020-01-14 | TruBlue LLC | Eddy current braking device for rotary systems |
| CN107265189A (en) * | 2017-07-19 | 2017-10-20 | 天津敏驰汽车部品有限公司 | Copper cash unreeling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA250777A (en) | 1980-06-15 |
| DE2814281C2 (en) | 1987-07-09 |
| PT67879B (en) | 1979-10-12 |
| IT7848772A0 (en) | 1978-04-06 |
| FR2386469A1 (en) | 1978-11-03 |
| IT1102455B (en) | 1985-10-07 |
| DE2814281A1 (en) | 1978-10-12 |
| FR2386469B3 (en) | 1981-02-20 |
| PT67879A (en) | 1978-05-01 |
| ES468635A1 (en) | 1978-12-01 |
| JPS53126329A (en) | 1978-11-04 |
| CH628001A5 (en) | 1982-02-15 |
| JPS6048430B2 (en) | 1985-10-26 |
| AT360881B (en) | 1980-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930406 |