CN85109520A - Make the method for toroidal ballast choke and used equipment - Google Patents
Make the method for toroidal ballast choke and used equipment Download PDFInfo
- Publication number
- CN85109520A CN85109520A CN198585109520A CN85109520A CN85109520A CN 85109520 A CN85109520 A CN 85109520A CN 198585109520 A CN198585109520 A CN 198585109520A CN 85109520 A CN85109520 A CN 85109520A CN 85109520 A CN85109520 A CN 85109520A
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- Prior art keywords
- iron core
- support
- winder
- mobile system
- choke
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
Abstract
A kind of method of making common ring ring shape choke; during with this method; the coated last layer insulating barrier of magnetive cord; (for example with injection molding or other die methods) the iron core separated into two parts, and configuration winding separately on every part then, two chokes making like this can series system be done the connection on electric; and be connected into a choke with original core configuration with mechanical welding; best, original iron core is an annulus, and every is roughly semicircular ring.
Description
In general, the present invention is relevant with field of light fittings, special with make common toroidal ballast and grip the method for circle and relevant with coil winding machine that common toroidal ballast choke was suitable for of manufacturing.
Just as we all know, often the incandescent lamp than same capability is big for the light fixture volume of use fluorescent lamp and other type fluorescent tube that has ballast choke, therefore, no matter from saving the space still for for the purpose of economical or attractive in appearance, always hope reduces the size of fluorescent lamp and similar lamp as much as possible.
People also wish by means of a kind of device, and class fluorescent tube such as fluorescence can be used on the skewer seat of ordinary incandescent lamp, when design specialized during in the fluorescent lamp of incandescent light fitting, have also just put forward for using the connector of being conceived like this.For example, United States Patent (USP) 3551736(Doehner) shows a kind of fluorescent lamp, the fluorescent tube of this lamp is installed on the ballast, but and be electrically connected the pedicure break-through to ballast, ballast also links to each other with lead-in wire from the lamp holder contact jaw, the outer surface of this lamp holder is shape of threads, may be screwed in the general incandescent lamp screw thread skewer seat.In this patent, ballast includes the ballast choke of an annular, and the connecting line of this choke is drawn by looping pit, and starter and capacitor are installed in the screwed socket.
Owing to will produce difficulty of toroidal ballast choke in a large number, particularly will be on annular core coiling more difficult, it is very expensive therefore making this device with conventional method.
People are desirable to provide a kind of convenience, and are simple, reliable and economic toroidal chokes manufacture method.
People also wish to provide a kind of simple coil winding machine that is used for this method.
So the objective of the invention is provides a kind of both simple for manufacturing is applicable to the common toroidal chokes in skewer head connector or other light fixtures, reliable, convenient and economic method.
Another object of the present invention provides a kind of simple, and coil winding machine reliably and easily, this machine are suitable for making and are used in the skewer head and connect common toroidal chokes in device or other light fixture.
Pendent u.s. patent application serial number as the common transfer of submitting on December 13rd, 1984 is a light fixture that is proposed in 681002, this light fixture can be a skewer head connector, in this connector, adopted a choke, this connector comprises: an inside has the shell (this groove is used for holding the lamp socket of fluorescent tube) of groove, be placed in the electric wiring (comprising ballast choke) in the shell, with the electrical contact element that is used to be connected electric wiring and external power source.If light fixture is a skewer head connector, also to there be an external fixation device to be used for connector is fixed on the skewer seat, it is desirable that electric wiring will partly be settled around groove at least, best, ballast choke is annular, and round groove.
The method according to this invention, at first to provide the iron core made from magnetic material, on iron core, form the insulating material coating again, iron core is divided into two, have a part of insulating coating on every, and on every iron core around upper conductor, (being separated with insulating barrier between winding and the iron core) promptly makes this ballast choke.Insulating barrier on the iron core preferably adopts casting, or iron core is placed in the mould that plastic material makes and insulating material pours into mould, after insulating material solidifies, iron core is deviate from the plastics mould.After insulating barrier had been coated with, the step of segmentation iron core was desirable, but neither the sin qua non.Resulting two chokes can use separately, also can have or do not have mechanical connection and form series connection on electric, and in fact, an independent choke has the shape of original iron core.
According to a further aspect in the invention, the coil winding machine that is provided comprises: the device that supports the arc magnetive cord, be centered around the device that winds the line on a part of iron core, one of being positioned at respect to the Winder support of this part iron core gives on the allocation, and mobile device: the iron core that will be supported on the support moves to the described allocation that gives along arching trajectory.
These and other purpose and male levying of the present invention, by having obtained thoroughly Jie below in conjunction with accompanying drawing to the detailed description meeting of most preferred embodiment is clear more, all identical label is represented components identical in the accompanying drawings.
Fig. 1 is a kind of perspective view of the skewer head connector that can help making by method of the present invention, and there is shown fluorescent tube should have the position on connector.
Fig. 2 is a front elevation view that is used for the toroidal ballast choke of Fig. 1 skewer head connector.
Fig. 3 is the top view of Fig. 2 choke.
Fig. 4 is that parts of Fig. 2 choke divide Jie to scheme.
Fig. 5 is the top view that is used for the iron core of shop drawings 2 chokes.
Fig. 6 is the top view that comprises the mould of Fig. 5 iron core, utilizes a scheme of the inventive method to form an insulating coating on iron core with explanation.
Fig. 6 A is the top view of iron core, for example Fig. 5 iron core behind the expression formation insulating barrier.
Fig. 7 is the sectional view after the mould among Fig. 6 sections from line 7-7.
Fig. 7 A is the top view of half iron core among Fig. 6 A.
Fig. 8 is half later top view of iron core coiling among Fig. 7 A.
Fig. 9 is the end view of the coil winding machine that adopted in the most preferred embodiment of the inventive method.
Figure 10 is a simple plane graph of Fig. 9 machine, shows iron core moving in the coiling process.
Fig. 1 shows a skewer head connector 10 that a kind of typical fluorescent tube is housed and uses toroidal chokes with the method for perspective, adopt method of the present invention can help making this class choke, what shown only was when an example is used for representing to use fluorescent tube on the connector should have the position, as finding, connector 10 has a shell 12, in the present embodiment, shell by the main part 14 of a garden tubular be connected superincumbent garden cartridge lamp head part 16 and form, form a groove 18 so that removably settle the lamp holder of fluorescent tube 20 at the top of shell main part 14, fluorescent tube 20 shown in the figure be one have U type glass outer cover fluorescent lamp, be used for producing fluorescence, the two ends of this outer cover are contained in one and see from the side on the lamp holder that is T-shape, and stretch out two downwards from the handle of lamp holder and be electrically connected pedicure, groove 18 is processed to a kind of like this shape and is convenient to fully hold the whole lamp socket that designs this class fluorescent tube of this connector for it.
Fluorescent lamp and the employed ballast choke of other type fluorescent tube are loaded in the garden cartridge type part 14 of shell 12, choke in the connector shown in Figure 1 manufactures around the ring-type of groove 18, preferably be placed in the garden tubular lamp holder 16 as starter in the electric wiring of connector 10 and capacitor, be with a garden tubular conducting sleeve 22 on this lamp holder, and be firmly fixed at the lower end of garden tubular lamp holder 16 by rights, on the outer surface of sleeve 22 screw thread is arranged so that connector 10 is screwed on the employed standard-type thread skewer of the incandescent lamp seat, sleeve 22 is used for realizing electric the contact with the skewer seat, lower end at garden tubular lamp holder 16 also has another one electric terminal 24, an aperture by sleeve 22 stretches out, and and the electric conducting material of sleeve keep at a certain distance away, during use, the electric contact of another contact of contact 24 and such skewer seat.
Have the hole on the groove 18, be used for holding the connection pedicure of fluorescent tube 20, and contact chip 21 is housed in the hole, can be connected the electric contact of pedicure.
Relevant described circuit element (choke, starter, capacitor, sleeve, the top contact and be used to connect the contact point of fluorescent tube contact feet) be electrically connected for the professional in the present technique field and know altogether.External thread sleeve 22 is connected with the winding of choke, the other end of this winding is linked contact chip 21, a connecting pin of this contact chip and fluorescent tube 20 joins, and another connecting pin of fluorescent tube is connected with another identical contact chip 21, this contact chip is connected to a capacitor 23 and starter 25 end separately, and the other end of capacitor and starter links to each other with contact 24 on the top of shell 12 outsides.
The used toroidal ballast choke 30 of skewer head connector is shown in Fig. 2 to Fig. 4 among Fig. 1, it comprises and is around in two windings 32 on the magnetive cord 34, in the present embodiment, each approximate half garden of iron core regulation ring, each winding 32 makes it respectively and two free ends of iron core 34 separately by insulation material layer 36, and its characteristics illustrate below.
Past, owing to being difficult to make the practicability that toroidal chokes has hindered the ballast choke of annular core with reliable and economic way, yet, illustrated choke, but make it be easy to realize simple, reliable and make (seeing Fig. 5 to Figure 10) at an easy rate: the annular core (iron core of banded silicon steel sheet coiling is suitable) that a kind of suitable common magnetic material at first is provided, provide insulating material coating 36 to annular core 34A then, this coating is topped in the top of this ring, the end, in, outer surface, but, have only the whole girth of a surface (for example inner surface 38 or perhaps outer surface is better) around ring, coated fully 36 topped.Other three surfaces, except two position 40(preferably fully relatively) all by topped, on position 40,, depend on the circumstances except that inner surface 38(or appearance) outside, iron core is in exposed state fully, when needing, iron core can expose fully at 40 places.Insulating barrier 36 preferably adopts injection molding to form, although can be replaced by any other suitable method according to convenient.
The best approach that forms insulating barrier 36 is that insulating material is injected in the mould, and as an example, the suitable insulation material can be pure nylon, iron core is trapped among one leaves exposed region at the needs place and return in 40 the mould.
The method of a remodeling is that insulating material is injected in the mould of the opened upper end that is placed with iron core, in this case, as an example, mould can be with making such as plastic materials such as silicones, after solidifying, can deviate from insulating material with the iron core 34A that any proper tools makes mould bending and handle have insulating barrier, an example of this mould is shown in Fig. 6 and 7, can see, wherein the part on the mould 41 is used for forming exposed region 40, and part 41 also is used for iron core is supported at the end of mould.If adopt best injection molding, used mould will be similar to mould shown in Fig. 6 and 7; Add modification obvious in the present technique field.
Retrofit according to another kind, though be not best, but still belong to scope of the present invention, can immerse original iron core in the groove that has insulating material and obtain insulating barrier, it is dry to put into (for example) baking oven, and blows away excess liquid, after the cutting, remove the insulating material powder on the iron core, to prevent damage winding when iron core winds the line.(during the high temperature of iron core, powder can be centered around on its edge
Then, in exposure position 40 annular core is cut into two, form two semi-circular iron cores 34 as shown in Figure 3, the most handy milling machine cuts, because people have found that milling machine cutting both effectively and the heat that produces is less, in addition, also can replace with any other Perfected process, in general, these are also included within the scope of the present invention.Then each iron core 34 is disposed its corresponding winding 32 respectively, because each iron core is garden arcuation (as from last finding), that is, a center line of delimiting the other parts boundary in half garden or garden is arranged, these windings can come coiling with a kind of very simple and economical method.When annular core 34 one ends are clamped and fixing, the axle that can be limited around the garden heart of this arc rotates on the arc plane, promptly, length direction rotation along iron core itself, when such rotation, lead produces desired winding 32 just around to iron core, in the process of coiling, the end of lead 50 is fixed with the appropriate method that ordinary skill adopted in the art.After winding 32 is wound into, the lead two ends for good and all are fixed on due position and become two semi-circular chokes by known method, if desired, the iron core of two semi-circular chokes also can weld together by means of fish paper or other known suitable, to form a complete garden once more.
Method of the present invention preferably adopts as shown in Figures 9 and 10 the coil winding machine 60 of most preferred embodiment to realize, this coil winding machine comprises the particularly semiorbicular magnetive cord 34 that is used to support arc as the support 62 of its basic element of character, device 66 is used for lead 50 is around in iron core 34 giving on the allocation 68 with respect to support 69, Winder is loaded on this support, device 70 is used for making the iron core 64 that is supported on the support 62 to move (with dashed lines 72 is represented in Figure 10) along an arching trajectory, track 72 has the same shape of winding portion on the iron core 43, as shown in this example, the same with track 72, iron core is semiorbicular.
Support 62 comprises anchor clamps that are loaded on the vertical rod 74, as described below, vertical rod is loaded on the horizon bar 76 of a part that constitutes iron core mobile device 70, anchor clamps comprise: be fixed in first bar 78 on the bar 74 and the second L shaped bar 80 is loaded on the bar 78 and make it can move (shown in arrow A among Fig. 9) along the length direction of bar 78, for example, bar 80 can pass a slot 84 and is fixed on the bar 78 with a screw 82, unclamp screw 82 and bar 80 is moved on the direction of arrow A and take off the object that is contained between bar 78 and 80, or an object is clipped between the two.Tighten screw 82 object is clamped in the appropriate location.During use, in this way an end of iron core 34 removably is clamped between bar 78 and 80.
Winder 66 comprises that an one end is loaded on the arm 90 on the frame 92, this arm can center on horizontal rotational shaft, lead provides (not illustrating the figure) from thread supplying device and passes hollow legn 90 and an aperture 94 from arm 90 free ends is drawn, the free end of lead 50 is fixed in an end of iron core with certain known proper method, preferably clamp by support 62, arm 90 drives rotation by the electric motor system shown in the square among the figure 96, the part of lead position 68 on the iron core.
When arm 90 rotations, support 62 rotates around vertical axis 98, obtain lead by position 68 from arm 90, desired position on the iron core, thereby along forming winding on the part of core length direction, as shown in the figure, bar 76 1 ends are fixed on the vertical rod 74, and the installation of the other end is so that it can rotate the real radius that equals semi-circular iron core arc of putting on of the length of bar 76 around vertical axis 98.Electric motor system 96 drive rods 76 rotate, and this system comprises the device that the made bar 79 known to the ordinary skill in present technique field moves on either direction around axle 98.
When other factors is identical, the density of formed winding on the iron core (being the number of turn on the iron core unit length) is by the rotating speed of arm 90 and iron core carriage release lever 76 recently determining around the speed of axle 98 rotations, and this ratio for good and all (intrinsic) by machine be arranged in the machine, but make speed more desirable than variable, so not only can make machine can on the iron core of intended size and shape, make the winding of different line densities, and can different size or shape or neither with iron core on coiling, such control can be provided by several method, at first, electric motor system 96 can comprise two motor that can independently control, and it is variable wherein having the speed of a motor at least and turning to.Another kind of approach is an available motor that speed is variable, with one have the variable rate system of cam and transmission device or suitable device, no matter adopt which kind of method, can control the initial sum stop position that the speed of motor and arm 90 and bar 76 move with the control system of a numeral when needing.Class devices such as suitable control system and drive system are that the general professional in present technique field is familiar with.
The professional in present technique field can manage to be situated between and arrive, being designed to choke 30 fully diametrically, symmetry is not requisite to the present invention, from be convenient to the design and from consideration attractive in appearance, also can adopt not too compact but still the Transform Type design of true usefulness, especially, choke might not be strict garden annular, it also can be ring-type, promptly, can be polygon or ellipse garden shape or other shape, in addition, for purposes of the invention, two radially relative on original annular core expose portions 40 neither be requisite, and this two parts are arranged, be easy to make iron core to be cut into two especially, and, the size and dimension of two original iron cores made identically can simplify the coiling process.Yet, in case of necessity, in two iron cores 34 one or two can form 180 degree less than a garden by original iron core cutting, and (the manufacturing complexity that causes thus is the words that allow) is same, and an iron core can cut into that another piece can cut into greater than 180 degree less than 180 degree.
In addition; after being preferably in the coated insulating barrier; again original annular core is divided into two; this order is reeled the iron core that forms by banded silicon steel sheet concerning one; for protecting it injury-free when cutting is very necessary; but, the way of coming out of order is also included within the scope of the present invention.
Although the present invention has been made detailed description with reference to most preferred embodiment, but consequent many improvement and variation are not conspicuous to the professional and technical personnel, therefore, the present invention is not subjected to that the level of detail of illustrative narration limits among the embodiment, and only is subjected to every restriction of claims.
Claims (15)
1, a kind of manufacture method of choke is characterised in that to comprise the following steps:
Coating one deck insulating material on the iron core of magnetic material;
Iron core is divided into two at least; With
On every iron core,, form winding separately around upper conductor.
2, the method for claim 1 is characterised in that: also comprise each windings in series step together.
3, the method for claim 2 is characterised in that: described iron core is annular, and this method also comprises the step that nine iron cores mechanically is welded together to form a complete garden ring.
4, the method for claim 1 is characterised in that: the step of coating insulating barrier 1 is to carry out before cutting step.
5, the method for claim 1 is characterised in that: cutting step is to carry out before the step of coating insulating barrier.
6, the method for claim 1 is characterised in that: the coating step comprises with injection molding and forms insulating barrier.
7, the method for claim 1 is characterised in that: the coating step comprises injects plastic mold to insulating material with the formation insulating barrier, and after insulating material solidifies, iron core is deviate from mould.
8, the method for claim 1 is characterised in that: cutting step adopts milling machine to finish.
9, the method for claim 1 is characterised in that: described iron core is annular.
10, the method for claim 1 is characterised in that: described coiling step is finished by a kind of like this device, and this device has:
A support;
A support is in order to support iron core;
A Winder that is supported on the support, so as with lead on a part that is supported on the iron core on the support, and this part gives with respect to the position of support and determining earlier;
An iron core mobile system moves the iron core that is supported on the support in so a kind of mode: when Winder was worked, iron core moved along an arching trajectory, make at least give on the iron core on the fixed fan-shaped section a bit can the order by giving fixed position; With
An electric motor system is used to drive Winder and iron core mobile system, and this iron core moves owing to the iron core mobile system cooperates the action of Winder.
11, the method for claim 10, be characterised in that: the iron core mobile system is suitable for making iron core to move along a garden arching trajectory, the radius of arc equals to give on the iron core radius of fixed fan-shaped section, when iron core during by stent support, the garden heart of arching trajectory is actual to be exactly the garden heart that gives fixed fan-shaped section on the iron core.
12, the method for claim 10 is characterised in that: described support is suitable for clamping removably an end of iron core.
13, the method for claim 10 is characterised in that: electric motor system comprises two motor; One drives Winder and another driving iron core mobile system.
14, the method for claim 10 is characterised in that: electric motor system comprises a motor, this motor driven Winder and iron core mobile system.
15, the method for claim 11 is characterised in that: having one speed in iron core mobile system and the Winder at least is controllable variations work with respect to another.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68112084A | 1984-12-13 | 1984-12-13 | |
| US68149384A | 1984-12-13 | 1984-12-13 | |
| US681,493 | 1984-12-13 | ||
| US681,120 | 1984-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85109520A true CN85109520A (en) | 1986-09-03 |
Family
ID=27102594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198585109520A Pending CN85109520A (en) | 1984-12-13 | 1985-12-13 | Make the method for toroidal ballast choke and used equipment |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0188095A1 (en) |
| JP (1) | JPS61185911A (en) |
| CN (1) | CN85109520A (en) |
| AU (1) | AU5121485A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746486A (en) * | 2014-01-27 | 2014-04-23 | 衣广津 | Lath-type choking coil |
| CN109509632A (en) * | 2018-11-26 | 2019-03-22 | 江阴市星火电子科技有限公司 | A kind of creel stand of coiling open type line packet |
| CN109767908A (en) * | 2018-11-26 | 2019-05-17 | 江阴市星火电子科技有限公司 | A kind of open type workpiece coil winding machine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4699184A (en) * | 1986-05-15 | 1987-10-13 | Kuhlman Corporation | Apparatus and method for fabricating a high voltage winding for a toroidal transformer |
| CH690474A5 (en) * | 1995-08-04 | 2000-09-15 | Lem Liaisons Electron Mec | Winding device for forming an electric coil on a magnetic circuit with air gap. |
| DE10159112A1 (en) * | 2001-12-01 | 2003-06-18 | Hella Kg Hueck & Co | Ignition transformer for motor vehicle gas discharge lamp, has permanent magnet located in air-gap of annular core |
| OA12790A (en) | 2002-03-13 | 2006-07-10 | Janssen Pharmaceutica Nv | New inhibitors of histone deacetylase. |
| NZ523324A (en) * | 2002-12-20 | 2005-03-24 | Wellington Drive Technologies | Bobbins for toroidal core wound continuously |
| US7746211B2 (en) * | 2006-12-27 | 2010-06-29 | General Electric Company | Lamp transformer assembly |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE479292C (en) * | 1925-12-03 | 1929-07-15 | Aeg | Process for the production of induction coils, mainly for telephone purposes |
| FR862834A (en) * | 1939-01-14 | 1941-03-17 | Lignes Telegraph Telephon | Improvements to electric coils |
| US2773651A (en) * | 1952-11-13 | 1956-12-11 | Western Electric Co | Coil winding apparatus |
| US2865086A (en) * | 1953-03-16 | 1958-12-23 | Western Electric Co | Method of making a toroidal magnetic device |
| US3032729A (en) * | 1957-05-16 | 1962-05-01 | Phillips Petroleum Co | Temperature stable transformer |
| DE1154868B (en) * | 1960-08-29 | 1963-09-26 | Telefunken Patent | Process for isolating the core and the winding of toroidal core coils or toroidal transformers, in particular in communications and measurement technology, by means of preferably thermoplastic insulating films |
| US3477051A (en) * | 1967-12-26 | 1969-11-04 | Ibm | Die casting of core windings |
-
1985
- 1985-12-12 EP EP85309051A patent/EP0188095A1/en not_active Withdrawn
- 1985-12-13 JP JP28087585A patent/JPS61185911A/en active Pending
- 1985-12-13 AU AU51214/85A patent/AU5121485A/en not_active Abandoned
- 1985-12-13 CN CN198585109520A patent/CN85109520A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746486A (en) * | 2014-01-27 | 2014-04-23 | 衣广津 | Lath-type choking coil |
| CN109509632A (en) * | 2018-11-26 | 2019-03-22 | 江阴市星火电子科技有限公司 | A kind of creel stand of coiling open type line packet |
| CN109767908A (en) * | 2018-11-26 | 2019-05-17 | 江阴市星火电子科技有限公司 | A kind of open type workpiece coil winding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61185911A (en) | 1986-08-19 |
| EP0188095A1 (en) | 1986-07-23 |
| AU5121485A (en) | 1986-06-19 |
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| WD01 | Invention patent application deemed withdrawn after publication |