IE930616A1 - A method and apparatus for manufacturing a contactor - Google Patents
A method and apparatus for manufacturing a contactorInfo
- Publication number
- IE930616A1 IE930616A1 IE930616A IE930616A IE930616A1 IE 930616 A1 IE930616 A1 IE 930616A1 IE 930616 A IE930616 A IE 930616A IE 930616 A IE930616 A IE 930616A IE 930616 A1 IE930616 A1 IE 930616A1
- Authority
- IE
- Ireland
- Prior art keywords
- contactor
- screw
- fixing
- screws
- feeler elements
- Prior art date
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- Manufacturing Of Electrical Connectors (AREA)
Abstract
In the manufacture of contactors individual contactors 6 are led to a detection station where they are locked in position. A latch feeler element 20 is moved into the contactor 6 and an alarm signal is generated if the presence of the latch is not detected. Wire guide rail feeler elements 30 and fixing screw feeler elements 31 are also automatically activated and alarm signals are generated if the absence of any of these components is detected. Contactor terminal screws 59 are delivered to the contactor by a cylindrical screw delivery element 70 which is rotated between a screw draw-in position and a screw delivery and fixing position.
Description
A Method and Apparatus for Manufacturing a Contactor
The invention relates to a method and apparatus for manufacturing a contactor.
The manufacture of contactors to required specifications is a time consuming and expensive process. There is a constant need for improvements in the method of manufacture to improve quality and reduce manufacturing costs generally.
This invention is directed towards providing a method and apparatus which will contribute significantly to these aims .
According to the invention there is provided a method for manufacturing a contactor comprising the steps of:inserting components including a magnetic coil into a base moulded part;
inserting components into a head moulded part;
fixing contacts and an arc shield into a desired position in the head part;
automatically detecting the presence of contacts in the head part;
printing user information on the arc shield to confirm that the contacts are present;
assembling the head part to the base part;
fixing the head part to the base part by fixing means extending from the head part to the base part;
attaching a rail mounting latch including a spring biasing means to the contactor;
attaching wire guides to the head part;
attaching terminal screws to the contacts;
electrically testing the power consumption and voltage operating characteristics of the contactor;
automatically detecting the presence of wire guides in the electrically tested contactor; and, if the wire guides are present packaging the contactor.
In a particularly preferred embodiment the method of the invention includes the steps of automatically detecting the presence of the spring biasing means in the electrically tested contactor and automatically rejecting the contactor for packaging if the spring biasing means is not in place.
Preferably the method includes the step of automatically detecting the presence of the fixing means in the electrically tested contactor and automatically rejecting the contactor for packaging if the fixing means is not in place.
In a particularly preferred arrangement the presence of the wire guides and spring biasing means are automatically detected substantially simultaneously in one operation.
In particularly preferred embodiment of the invention the presence of the wire guides and fixing means are automatically detected substantially simultaneously in one operation.
In a specially preferred arrangement the presence of the wire guides, spring biasing means and fixing means are automatically detected substantially simultaneously in one operation.
Preferably, the wire guides, spring biasing means and fixing means are detected by:stopping the electrically tested contactor at an automatic detection station;
extending feeler elements to the contactor to detect the presence of the wire guides, spring biasing means and fixing means, and activating an alarm signal if any of the wire guides, spring biasing means or fixing means is not in position.
In one embodiment of the invention the feeler elements activate limit sensors if the wire guides, spring biasing means or fixing means is not in position, the sensors activating an alarm means . Preferably the feeler elements are each carried by ram means, the ram means being activated to push the feeler elements forwardly to engage the contactor when the contactor is in position in the automatic detecting station.
In a preferred arrangement separate ram means are provided for each feeler element, the feeler elements being pushed forwardly independently of each other.
In a particularly preferred embodiment of the invention the terminal screws are attached to the contactor by:
delivering a plurality of terminal screws in a desired orientation to a screw delivery head;
drawing a desired number of correctly orientated terminal screws into screw receiving recesses in the screw delivery head;
moving the screws into a desired position over the contactor;
releasing the screws into the contactor; and fixing the screws into position in the contactor.
Most preferably the correctly orientated terminal screws are drawn into the screw receiving recesses by means of a vacuum. Preferably, the screws are released into the contactor by releasing the vacuum.
In a particularly preferred arrangement the screw delivery head includes a rotatable element which is rotatably mounted in the delivery head for movement between a screw draw-in position and a screw delivery and fixing position. Preferably the rotatable element is a cylindrical element having transverse holes extending therethrough, one for each terminal screw to be delivered to the contactor, the cylindrical element being rotated from the screw draw-in position with the holes in line with a vacuum source to a screw delivery and fixing position in which the holes extend axially with respect to the screws to release the screws into position in the contactor and to facilitate the insertion of screw rotating heads for fixing the screws into position in the contactor.
The invention also provides a contactor whenever manufactured by the method of the invention.
In another aspect the invention provides automatic detection apparatus for use in the method of the invention, the automatic detection apparatus comprising:
means for stopping a contactor at a detection station;
feeler elements mounted on mounting frames on both sides of the contactor;
means for moving the feeler elements forwardly to engage the contactor;
sensing means for sensing the position of the feeler elements; and alarm means for signalling a fault if the feeler elements do not detect the presence of wire guides, fixing means and/or spring biasing means in the contactor.
In this arrangement preferably there are wire guide feeler elements, fixing means feeler elements, and spring biasing means feeler elements, and the means for moving the feeler elements comprises independent ram means for each feeler element.
Most preferably the sensing means comprises independent infra-red sensing means for detecting the position of each of the feeler elements.
In a further aspect the invention provides automatic detection apparatus for detecting the presence of wire guides, fixing means and/or spring biasing means in a contactor comprising:
means for stopping a contactor at a detection station;
feeler elements mounted on mounting frames on both sides of the contactor;
means for moving the feeler elements forwardly to engage the contactor;
sensing means for sensing the position of the feeler elements; and alarm means for signalling a fault if the feeler elements do not detect the presence of wire guides, fixing means and/or spring biasing means in the contactor.
Preferably there are wire guide feeler elements, fixing means feeler elements, and spring biasing means feeler elements, and the means for moving the feeler elements comprises independent ram means for each feeler element.
In a particularly preferred arrangement the sensing means comprises independent infra-red sensing means for detecting the position of each of the feeler elements.
In a still further aspect the invention provides terminal screw handling and fixing apparatus for use in a method of the invention, the apparatus comprising:
a screw delivery head mounted on a mounting frame;
the screw delivery head having a plurality of screw receiving recesses;
means for drawing the screws into the recesses; and means for releasing the screws into a desired position in a contactor.
Preferably the means for drawing the screws into the recesses comprises a vacuum source.
In a particularly preferred arrangement a rotatable element is rotatably mounted in the screw delivery head for movement between a screw draw-in position and a screw delivery and fixing position. Preferably the rotatable element comprises a cylindrical element having transverse holes extending therethrough, are for each terminal screw to be delivered to a contactor.
In a particularly preferred arrangement the cylindrical element is rotated from a position in which the screw receiving holes are exposed to the vacuum source to a fixing position in which the screw holes are axially aligned with the screws for fixing the screws to the contactor.
In another aspect the invention provides terminal screw handling and fixing apparatus for placing and fixing terminal screws to a contactor comprising:a screw delivery head mounted on a mounting frame;
the screw delivery head having a plurality of screw receiving recesses;
means for drawing the screws into the recesses; and means for releasing the screws into a desired position in a contactor.
In a preferred arrangement the means for drawing the screws into the recesses comprises a vacuum source.
Preferably, a rotatable element is rotatably mounted in the screw delivery head for movement between a screw drawin position and a screw delivery and fixing position.
In a particularly preferred arrangement the rotatable element comprises a cylindrical element having transverse holes extending therethrough, one for each terminal screw to be delivered to a contactor.
Preferably the cylindrical element is rotated from a position in which the screw receiving holes are exposed to the vacuum source to a fixing position in which the screw holes are axially aligned with the screws for fixing the screws to the contactor.
The invention further provides contactors whenever manufactured using the automatic detection apparatus and/or the terminal screw handling and fixing apparatus of the invention.
The invention will be more clearly understood by the following description thereof, given by way of example, with reference to the accompanying drawings, in which:Fig. 1 is a perspective view of an automatic detection apparatus used in the method of the invention;
Fig. 2 is a plan view of the apparatus of Fig. 1;
Fig. 3 is a plan view of a detail of the apparatus of Fig· 1?
Fig. 4 is a perspective view of terminal screw handling and fixing apparatus used in the method of the invention;
Fig. 5 is a perspective view of a detail of the apparatus of Fig. 4;
Figs. 6A and 6B are cross-sectional views of the detail of Fig. 5; and
Figs. 7A, 7B and 7C are diagrammatic views illustrating the operation of the apparatus of Figs. 4, 5 and 6.
In the method for manufacturing a contactor according to the invention, components including a magnetic coil are first inserted into a base moulded part. Additional components are then inserted into a head moulded part and contacts and an arc shield are fixed into a desired position in the head part.
A detection means is used for automatically detecting the presence of contacts in the head part before printing user information on the arc shield if the contacts are present. If the contacts are not present the arc shield is not printed thus acting as a quality control step.
The head part and base part are then assembled and fixed together by means of fixing means, typically two spacedapart fixing screws extending from the head part to the base part.
Various components are then attached to the contactor including a rail mounting latch which includes a spring biasing means in the form of a coil spring. Wire guides are also attached to the head part and terminal screws are attached to the contacts as will be described in more detail below. Caps are attached over the terminal screws and user information is printed on the caps.
The electrical characteristics including the power consumption and voltage operating characteristics of the contactor are then tested. If the assembled contactor passes the electrical tests the contactor then passes to a detection station which will be described in more detail below in which the presence of the wire guides, the spring biasing means and the fixing screws in the electrically tested contactor are checked. If any or all of these components is not present the contactor is rejected for further working. Only if the contactor passes the automatic detection station with all components intact does the contactor pass to finishing and packaging.
At the detection station, as will be described in more detail below, the wire guides, spring biasing means and fixing means are detected by stopping the electrically tested contactor at the automatic detection station and extending feeler elements to the contactor to detect the presence of the wire guides, coil spring and fixing screws. An alarm signal is activated if any of the wire guides, spring or fixing screws is not in position. The feeler elements are operated by ram means which are activated to push the feeler elements forwardly to engage the contactor elements when the contactor is in position in the automatic detection station.
As will be described in more detail below, the terminal screws are attached to the contactor by first delivering a plurality of terminal screws in a desired orientation, the screws being orientated for example, by means of a vibratory feeder to a screw delivery head. A desired number of correctly orientated terminal screws are then drawn into the screw receiving recesses in the screw delivery head and moved into a desired position over the contactor. The screws are then released into the contactor and are fixed in position. The pick-up and release is controlled by means of a rotatable element in the screw head which exposes the screw receiving holes in the element to a vacuum source for pick-up and closes off the vacuum source when the rotatable head is moved to the screw delivery fixing position, allowing screw driving elements to pass through the screw head to fix the terminal screws into position in the contactor.
In more detail and referring particularly to Figs. 1 to 3 there is illustrated an automatic detection apparatus which is used in the method of the invention. The apparatus, indicated generally by the reference numeral 1, includes a conveyor 2 along which a plurality of small pallets 5 each bearing an individual contactor 6 in a desired orientation is led to the detection station. Mounting frames 3, 4 are arranged on either side of the conveyor 2. When a pallet 5 enters the detecting station it is automatically locked in a desired position at the station by means of a locking element (not shown) which engages the pallet 5.
The contactor 6 is retained in position on the pallet 5 by retaining elements 8, 9. The retaining element 9 includes a latch access hole 10 and the mounting element 8 includes upper and lower wire guide access holes 11 and fixing screw access holes 13, respectively.
A latch feeler element 20 is mounted on the arm 21 of a ram 22 which is mounted to the frame 4 on one side of the conveyor 2. A collar 23 is fixedly mounted on the arm 21 and moved forwardly as the feeler element 20 is moved into the recess 10 in the frame 9. Sensing means for sensing the position of the collar 23 is provided by an infra-red emitter and detector combination 28 which is activated when the collar 23 passes between the infra-red beam therebetween to indicate that the feeler element 20 has stopped at the correct position when the latch is present in the contactor 6. If there is no latch present the feeler element 20 is free to move forwardly under the biasing of the ram 22 and the collar 23 passes through the infra-red emitter and detector station sending an alarm signal to a control unit which causes the contactor 6 to be rejected for further processing.
Similarly, wire guide rail feeler elements 30 and fixing screw feeler elements 31 are activated by a ram 35 which pushes the feeler elements forwardly to engage the contactor through the access holes 11, 12 in the frame 8 surrounding the other side of the contactor 6. An arm 36 of the ram 35 is connected to a frame 37 in which the feeler elements 30, 31 are mounted. The feeler elements include collars 38, 39, the position of which is monitored by respective infra-red detectors 40, 41. The operation is similar to that described above in relation to the spring feeler element 20.
Referring to Figs. 4 to 7 there is illustrated a terminal screw handling and fixing apparatus 50 used in the method of the invention. The apparatus 50 comprises a support 51 for a contactor 52, a left side support frame 53 including a screw delivery head 54 and a right side support frame 55 including the screw delivery head 56. Vacuum supply lines 57 are provided for the screw delivery heads 56.
The apparatus also includes a head piece 60 having eight screw driver elements 61, four on each side, for engaging with terminal screws 59 when in position on the contactor 52 for fixing the screws 59 to the contactor.
with terminal screws 59 when in position on the contactor 52 for fixing the screws 59 to the contactor.
In more detail and referring particularly to Figs. 5 and 6 A and 6B, the right hand screw delivery head 56 is illustrated in more detail. The left hand screw delivery head is of similar construction. The screw delivery head 56 has a cylindrical rotatable element 70 mounted therein for movement between a screw draw-in position illustrated in Fig. 6A to a screw delivery and fixing position illustrated in Fig. 6B. The cylindrical rotating element has a series of four spaced-apart through-holes 71, one for each terminal screw 59. The delivery head 56 includes a series of four transversely extending holes 76 through which a vacuum is drawn along the vacuum lines 57 and a series of four vertically extending holes 75 for receiving the screw driving heads 61 for fixing the terminal screws 59 to the contactor 52.
The screw delivery heads 7 0 are rotatable from a screw draw-in position illustrated in Fig. 6A in which the holes 71 in the cylindrical element 70 are in line with the holes 76 of the delivery head 56 and the vacuum is drawn through the holes 76 and 71 to draw in terminal screws 59 in a correct desired orientation for fixing to the contactor 52. As illustrated particularly in Figs. 6A, 6B, 7A, 7B and 7C, the screw head 56 with the terminal screws 59 in position is then moved across to the contactor 52 and the screws 59 are moved into position over the terminals of the contactor 52. When the terminal screws 59 are in the desired position the cylindrical rotatable element 70 is rotated to the position illustrated in Fig. 6B, releasing the vacuum and allowing the screws to drop into the correct position in the contactor 52. When the screws have dropped into position the screw driving heads 61 are pushed downwardly through the aligned holes 75 in the screw head 56 and the holes 71 in the cylindrical rotating element 70 allowing the screw fixing means 61 to pass through for rotation to fix the terminal screws 59 into position on the contactor.
It will be appreciated that while the terminal screw handling and fixing apparatus and the automatic detection apparatus have been described with reference to a the method for manufacturing a particular contactor, they may have other applications.
The invention provides a method and apparatus for manufacturing a contactor to very high levels of quality and at reduced costs.
Many variations on the specific embodiments of the invention described are readily apparent and accordingly the invention is not limited to the embodiments hereinbefore described which may be varied in both construction and detail.
Claims (10)
1. A method for manufacturing a contactor comprising the steps of:inserting components including a magnetic 5 coil into a base moulded part; inserting components into a head moulded part; fixing contacts and an arc shield into a desired position in the head part; 10 automatically detecting the presence of contacts in the head part; printing user information on the arc shield to confirm that the contacts are present; assembling the head part to the base part; 15 fixing the head part to the base part by fixing means extending from the head part to the base part; attaching a rail mounting latch including a spring biasing means to the contactor; 20 attaching wire guides to the head part; attaching terminal screws to the contacts; electrically testing the power consumption and voltage operating characteristics of the contactor;
2. Including the step of automatically detecting the presence of the fixing means in the electrically tested contactor and automatically rejecting the contactor for packaging if the fixing means is not in place. A method as claimed in claim 2 wherein the presence of the wire guides and spring biasing means are automatically detected substantially simultaneously in one operation. A method as claimed in claim
3. Or 3.
4. Wherein the presence of the wire guides and fixing means are automatically detected substantially simultaneously in one operation. A method as claimed in claim 3, 4 or 5 wherein the presence of the wire guides, spring biasing means and fixing means are automatically detected substantially simultaneously in one operation. 4.
5. Position. A latch feeler element 20 is moved into the contactor 6 and an alarm signal is generated if the presence of the latch is not detected.
6. Wire guide rail feeler elements 30 and fixing screw feeler elements 31 are also automatically activated and alarm signals are 5 position. 33. Apparatus as claimed in claim 32 wherein the rotatable element comprises a cylindrical element having transverse holes extending therethrough, are for each terminal screw to be delivered to a 10 contactor. 34. Apparatus as claimed in claim 33 wherein the cylindrical element is rotated from a position in which the screw receiving holes are exposed to the vacuum source to a fixing position in which the 15 screw holes are axially aligned with the screws for fixing the screws to the contactor. 35. Terminal screw handling and fixing apparatus substantially as hereinbefore described with reference to the accompanying drawings. 20 36. Contactors whenever manufactured using the automatic detection apparatus of any of claims 21 to 24 and/or the terminal screw handling and fixing apparatus of any of claims 30 to 35. CRUICKSHANK & CO. ABSTRACT Fig. 2 In the manufacture of contactors individual contactors 6 are led to a detection station where they are locked in 5. 25 6. automatically detecting the presence of wire guides in the electrically tested contactor; and, if the wire guides are present packaging the contactor. A method as claimed in claim 1 including the steps of automatically detecting the presence of the spring biasing means in the electrically tested contactor and automatically rejecting the contactor for packaging if the spring biasing means is not in place. A method as claimed in claim 1 or
7. A method as claimed in claim 6 wherein the wire guides, spring biasing means and fixing means are detected by:stopping the electrically tested contactor at an automatic detection station; extending feeler elements to the contactor to detect the presence of the wire guides, spring biasing means and fixing means; and activating an alarm signal if any of the wire guides, spring biasing means or fixing means is not in position.
8. A method as claimed in claim 7 wherein the feeler elements activate limit sensors if the wire guides, spring biasing means or fixing means is not in position, the sensors activating an alarm means .
9. A method as claimed in claim 7 or 8 wherein the feeler elements are each carried by ram means, the ram means being activated to push the feeler elements forwardly to engage the contactor when the contactor is in position in the automatic detecting station. 10. A method as claimed in claim 8 wherein separate ram means are provided for each feeler element, the feeler elements being pushed forwardly independently of each other. 11. A method as claimed in any preceding claim wherein the terminal screws are attached to the contactor by: delivering a plurality of terminal screws in a desired orientation to a screw delivery head; drawing a desired number of correctly orientated terminal screws into screw receiving recesses in the screw delivery head; moving the screws into a desired position over the contactor; releasing the screws into the contactor; and fixing the screws into position in the contactor. 12. A method as claimed in claim 11 wherein the correctly orientated terminal screws are drawn into the screw receiving recesses by means of a vacuum. 13. A method as claimed in claim 12 wherein the screws are released into the contactor by releasing the vacuum. 14. A method as claimed in claim 12 or 13 wherein the screw delivery head includes a rotatable element which is rotatably mounted in the delivery head for movement between a screw draw-in position and a screw delivery and fixing position. 15. A method as claimed in claim 14 wherein the rotatable element is a cylindrical element having transverse holes extending therethrough, one for 16. 17 . 18. each terminal screw to be delivered to the contactor, the cylindrical element being rotated from the screw draw-in position with the holes in line with a vacuum source to a screw delivery and fixing position in which the holes extend axially with respect to the screws to release the screws into position in the contactor and to facilitate the insertion of screw rotating heads for fixing the screws into position in the contactor. A method substantially as hereinbefore described with reference to the accompanying drawings. A contactor whenever manufactured by a method as claimed in any preceding claim. Automatic detection apparatus for use in the method of any of claims 6 to 16 comprising: means for stopping a contactor at a detection station; feeler elements mounted on mounting frames on both sides of the contactor; means for moving the feeler elements forwardly to engage the contactor; sensing means for sensing the position of the feeler elements; and alarm means for signalling a fault if the feeler elements do not detect the presence of wire guides, fixing means and/or spring biasing means in the contactor. 19. Apparatus as claimed in claim 18 wherein there are wire guide feeler elements, fixing means feeler elements, and spring biasing means feeler elements, and the means for moving the feeler elements comprises independent ram means for each feeler element. 20. Apparatus as claimed in claim 18 or 19 wherein the sensing means comprises independent infra-red sensing means for detecting the position of each of the feeler elements. 21. Automatic detection apparatus for detecting the presence of wire guides, fixing means and/or spring biasing means in a contactor comprising: means for stopping a contactor at a detection station; feeler elements mounted on mounting frames on both sides of the contactor; means for moving the feeler elements forwardly to engage the contactor; sensing means for sensing the position of the feeler elements; and alarm means for signalling a fault if the feeler elements do not detect the presence of wire guides, fixing means and/or spring biasing means in the contactor. 22. Apparatus as claimed in claim 21 wherein there are wire guide feeler elements, fixing means feeler elements, and spring biasing means feeler elements, and the means for moving the feeler elements comprises independent ram means for each feeler element. 23. Apparatus as claimed in claim 22 wherein the sensing means comprises independent infra-red sensing means for detecting the position of each of the feeler elements. 24. Automatic detection apparatus substantially as hereinbefore described with reference to the accompanying drawings . 25. Terminal screw handling and fixing apparatus for use in a method as claimed in any of claims 11 to 16 comprising: a screw delivery head mounted on a mounting frame; the screw delivery head having a plurality of screw receiving recesses; means for drawing the screws into the recesses; and means for releasing the screws into a desired position in a contactor. 26. Apparatus as claimed in claim 25 wherein the means for drawing the screws into the recesses comprises a vacuum source. 27. Apparatus as claimed in claim 26 wherein a rotatable element is rotatably mounted in the screw delivery head for movement between a screw draw-in position and a screw delivery and fixing position. 28. Apparatus as claimed in claim 27 wherein the rotatable element comprises a cylindrical element having transverse holes extending therethrough, one for each terminal screw to be delivered to a contactor. 29. Apparatus as claimed in claim 28 wherein the cylindrical element is rotated from a position in which the screw receiving holes are exposed to the vacuum source to a fixing position in which the screw holes are axially aligned with the screws for fixing the screws to the contactor. 30. Terminal screw handling and fixing apparatus for placing and fixing terminal screws to a contactor comprising:a screw delivery head mounted on a mounting frame; the screw delivery head having a plurality of screw receiving recesses; means for drawing the screws into the recesses; and means for releasing the screws into a desired position in a contactor. 31. Apparatus as claimed in claim 30 wherein the means for drawing the screws into the recesses comprises a vacuum source. 32. Apparatus as claimed in claim 31 wherein a rotatable element is rotatably mounted in the screw delivery head for movement between a screw draw-in position and a screw delivery and fixing
10. Generated if the absence of any of these components is detected. Contactor terminal screws 59 are delivered to the contactor by a cylindrical screw delivery element 70 which is rotated between a screw draw-in position and a screw delivery and fixing position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE930616A IE930616A1 (en) | 1993-08-19 | 1993-08-19 | A method and apparatus for manufacturing a contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE930616A IE930616A1 (en) | 1993-08-19 | 1993-08-19 | A method and apparatus for manufacturing a contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IE930616A1 true IE930616A1 (en) | 1995-02-22 |
Family
ID=11040056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE930616A IE930616A1 (en) | 1993-08-19 | 1993-08-19 | A method and apparatus for manufacturing a contactor |
Country Status (1)
| Country | Link |
|---|---|
| IE (1) | IE930616A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391114A (en) * | 2019-06-29 | 2019-10-29 | 广东利元亨智能装备股份有限公司 | Production process of direct current contactor |
-
1993
- 1993-08-19 IE IE930616A patent/IE930616A1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391114A (en) * | 2019-06-29 | 2019-10-29 | 广东利元亨智能装备股份有限公司 | Production process of direct current contactor |
| CN110391114B (en) * | 2019-06-29 | 2021-07-30 | 广东利元亨智能装备股份有限公司 | Production process of direct current contactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM9A | Patent lapsed through non-payment of renewal fee |