EP0008866A1 - Electrical switches - Google Patents
Electrical switches Download PDFInfo
- Publication number
- EP0008866A1 EP0008866A1 EP79301509A EP79301509A EP0008866A1 EP 0008866 A1 EP0008866 A1 EP 0008866A1 EP 79301509 A EP79301509 A EP 79301509A EP 79301509 A EP79301509 A EP 79301509A EP 0008866 A1 EP0008866 A1 EP 0008866A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- base
- support member
- relative
- axial
- operating member
- 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.)
- Withdrawn
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H25/00—Switches with compound movement of handle or other operating part
- H01H25/06—Operating part movable both angularly and rectilinearly, the rectilinear movement being along the axis of angular movement
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/023—Light-emitting indicators
Definitions
- This invention relates to electrical switches.
- a known electrical switch has a body including a base member apertured to receive a light source whereby the operating member of the switch or part thereof or part of the switch body can be illuminated from within the body.
- the known switch includes the facility of both axial and rotary movement of the operating member to operate contacts of the switch. It is desirable to be able to produce such known switches and similar switches without the axial or the rotary movement facility using the maximum number of common components and common assembly frequencies and it is an object of the present invention to facilitate such production.
- An electrical switch comprises a body, including a base, an operating member supported by the body for rotational and axial movement relative thereto, an aperture extending through the base and a light source support member received in said aperture, said support member and the wall of the aperture being so shaped that the support member can be located in the base in either of first and second different axial positions relative to the base, and the support member including a blocking element, which in the first axial location of the support member relative to the base, extends into the path of either axial or rotational movement of the operating member relative to the body to prevent such movement of the operating member relative to the body, the second location of the support member relative to the base being such that said blocking element lies out of the path of either axial or rotational movement of the operating member so that both movements of the operating member relative to the body are permitted.
- axial and rotational movement of the support member relative to the base is resisted by engagement of abutting surfaces on the support member and the base, said support member being flexible to permit said abutting surfaces to be disengaged, and engagement of a light source in said support member preventing such flexure of the support member.
- the support member occupies different rotational positions relative to the base in the first and second axial locations respectively.
- the rotational position occupied by the support member relative to the base in the first axial location of the support member relative to the base is spaced from the rotational position occupied by the support member relative to the base in the second axial location by 90°.
- the light source which the support member is arranged to receive is one end of an optical cable.
- the switch comprises a body 11 which is fixed in use, and which includes a moulded synthetic resin base 12. Rotatable within the body, and extending therefrom to facilitate manual operation, is a moulded synthetic resin operating member 13.
- the base 12 carries fixed electrical contacts l4 engageable by a movable electrical contact 15 rotatable with the operating member 13.
- the operating member 13 is capable of both rotational movement relative to the base 12 in a plane parallel to the base 12, and axial movement relative to the base 12 in the direction of the axis of rotation of the operating member relative to the base.
- the operating member 13 and the body 11 include first and second detent arrangements 16, 17 the detent arrangement 16 controlling the axial positions of the operating member 13, relative to the body, and the detent mechanism 17 defining the angular positions of the operating member relative to the body.
- the nature of the various sets of contacts controlled by the two movements of the operating member 13 relative to the body are of no importance to the present invention.
- the base 12 is provided with a centrally disposed aperture, or bore 18 extending completely through the base parallel to the axis of rotational movement of the operating member 13.
- the bore 18 is a plane cylindrical bore intermediate its ends, but at its end includes a more complex shaping, the detail and purpose of which will be described hereinafter.
- a light source support member 19 which is moulded in synthetic resin material and which is generally in the form of a cylindrical tube the outer diameter of which is substantially equal to the inner diameter of the cylindrical region of the bore 18 and the inner diameter of which is substantially equal to the outer diameter of the ferrule provided at one end of an optical cable.
- the member 19 is split axially to define first and second limbs 21, 22 which are substantially mirror images of one another, and are integrally interconnected at one end 23 only for the member 19.
- the ends 23 of the member 19 is the end which will be adjacent the exterior of the base 12 in use.
- the limbs 21, 22 each include a radially outwardly extending protuberance 24 the leading edge of which is tapered to define a ramp 25.
- the member 19 is provided with a diametrically opposed pair of radially outwardly extending quadrant shaped lugs 26 and as can be seen in Figures 6 and 7 one of the lugs 26 is split into two sections so that in effect the only part interconnecting the two limbs 21, 22 is the lug 26 which is not split. It will be recognised therefore that the limbs 21, 22 can be moved in such a direction that the gap between their free ends is increased this movement being permitted by flexure of the whole lug 26. However, additionally the member 19 can be flexed again by flexure of the whole lug 26 in a direction to increase or reduce the diameter of the member 19
- the protuberances 24 extend radially outwardly diametrically opposite one another as to the lugs. However, the lugs 26 are spaced from the protuberances 24 by 90° rotationally about the longitudinal axis of the member 19.
- the outermost end of the bore 18 in the base 11 is formed with a pair of radial extensions defining recesses 26a in the outer surface of the base.
- the shaping of the recesses 26a conforms to the shaping of the lugs 26, and it will be recognised therefore that the member 19 can be inserted into the bore 18 and can be located angularly within the bore 18 such that the lugs 26 enter the recesses 26a.
- the length of the member 19 is such that when the lugs 26 are seated in the recesses 26a then the protuberances 24 of the limbs 21, 22 project beyond the innermost end of the bore 18, and thus the shoulders define at the trailing ends of the protuberances, 24 engage the inner surface 12a, of the base 12.
- the co-operation between the lugs 26 and the recesses 26a prevent rotational movement of the member 19 relative to the base 12, and the engagement of the shoulders at the trailing ends of the protuberances 24 with the surface 12a of the base resists axial movement of the member 19 relative to the base. It is to be understood however that the member 19 can be removed from the bore 18 merely by flexing the limbs 21, 22 towards one another to disengage the shoulders of the protuberances 24 from the surface 12a.
- the free ends of the limbs 21, 22 define a blocking element extending into the path of axial movement of the operating member 13 relative to the body 11.
- a blocking element extending into the path of axial movement of the operating member 13 relative to the body 11.
- a diametrically opposed pair of axially extending grooves 24a At the innermost end of the bore 18 in the base 12 and spaced around the circumference of the bore 18 by 90 0 from the recesses 26a is a diametrically opposed pair of axially extending grooves 24a.
- the depth of the grooves 24a is such that the protuberances 24 can be accommodated therein with the remainder of the length of the limbs 21, 22 engaging the cylindrical region of the bore 18.
- the ferrule 20 is first removed and the member 19 is partially withdrawn from the bore 18 as permitted by inward flexure of the limbs 21, 22.
- the member 19 is then rotated through 90° with respect to the base 12 so that the protuberances 24 align with the grooves 24a and into the grooves 24a by virtue of the inherent resilience of the member 19.
- the lugs 26 are both axially and angularly spaced from the recesses 26a and the under surfaces of the lugs 26 now engage the outer surface of the base 12.
- the ferrule 20 is then reinserted into the support member 19 and again serves to prevent inward flexure of the limbs 21, 22.
- the inner surface of the member 19 is shaped at 27 to conform to the ferrule 20, so that a latching effect is achieved between the ferrule and the member 19 when the ferrule is inserted.
- the latching effect is sufficient to resist a relatively low axial loading tending to withdraw the ferrule from the member 19, but of course upon application of a definite pulling force the ferrule 20 can be removed to permit movement of the member 19 relative to the base 12 between its first and second axial positions.
- the locking element defined by the end regions of the limbs 21, 22 of the member 19 serve to block axial movement of the operating member 13 relative to the base 12.
- the member 19 in its first axial position can serve to prevent part or all of the otherwise possible rotational movement of the operating member 13 relative to the base 12, while permitting the axial movement of the operating member relative to the base 12.
- the light source support member 19 is arranged positively to be retained in the base 12 irrespective of whether or not a light source is engaged therein.
- the bore 18 is formed in its wall with a pair of axially extending grooves 31 which receive lugs 32 of the member 19 during insertion of the member 19 into the bore 18.
- the wall of the bore 18 is formed with a diametrically opposed pair of segment shaped recesses 32a in which the lugs 32 of the member 19 can be received upon rotation of the member 19 within the bore 18.
- the member 19 is inserted through the bore 18 until the lugs 26 engage the outer face of the base 12 between the projections 33 and the lugs 32 project from the inner end of the bore 18.
- the member 19 is then rotated to engage the lugs 32 with the surface 12a of the base to resist withdrawal of the member 19.
- Reverse rotation of the member 19 to re-align the lugs 32 with the grooves 31 is resisted by engagement of pips 35, on the base 12 between the projections 33, in dimples 35a in the lugs 26.
- the member 19 has two alternative axial positions relative to the base 12 and in both positions withdrawal of the member 19 is resisted by the lugs 32.
- the light source to be received within the light source support member 19 is the ferrule of one end of an optical cable, it is to be understood that the light source could be a bulb holder containing an incandescent bulb.
- the first switch has the facility for both rotational and axial movement of the operating member, that is to say when the support member 19 occupies its second axial psotion, whereas the second switch defined by the member 19 being in its first axial position, has a restricted facility of movement of the operating member 13 relative to the base.
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
- Switches With Compound Operations (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
An electrical switch comprises a body (11), including a base (12), an operating member (13) supported by the body for rotational and axial movement relative thereto, an aperture (18) extending through the base (12) and a light source support member (19) received in said aperture (18). The support member (19) and the wall of the aperture (18) are so shaped that the support member (19), can be located in the base (12) in either of first and second different axial positions relative to the base (12). The support member (19) includes a blocking element, which in the first axial location of the support member (19) relative to the base (12), extends into the path of either axial or rotational movement of the operating member (13) relative to the body to prevent such movement of the operating member (13) relative to the body (11), the second location of the support member (19) relative to the base (12) being such that said blocking element lies out of the path of either axial or rotational movement of the operating member (13) so that both movements of the operating member (13) relative to the body are permitted.
Description
- This invention relates to electrical switches.
- A known electrical switch has a body including a base member apertured to receive a light source whereby the operating member of the switch or part thereof or part of the switch body can be illuminated from within the body. The known switch includes the facility of both axial and rotary movement of the operating member to operate contacts of the switch. It is desirable to be able to produce such known switches and similar switches without the axial or the rotary movement facility using the maximum number of common components and common assembly frequencies and it is an object of the present invention to facilitate such production.
- An electrical switch according to the invention comprises a body, including a base, an operating member supported by the body for rotational and axial movement relative thereto, an aperture extending through the base and a light source support member received in said aperture, said support member and the wall of the aperture being so shaped that the support member can be located in the base in either of first and second different axial positions relative to the base, and the support member including a blocking element, which in the first axial location of the support member relative to the base, extends into the path of either axial or rotational movement of the operating member relative to the body to prevent such movement of the operating member relative to the body, the second location of the support member relative to the base being such that said blocking element lies out of the path of either axial or rotational movement of the operating member so that both movements of the operating member relative to the body are permitted.
- Desirably, in both of said first and second locations of said support member relative to said base, axial and rotational movement of the support member relative to the base is resisted by engagement of abutting surfaces on the support member and the base, said support member being flexible to permit said abutting surfaces to be disengaged, and engagement of a light source in said support member preventing such flexure of the support member.
- Conveniently the support member occupies different rotational positions relative to the base in the first and second axial locations respectively.
- Desirably the rotational position occupied by the support member relative to the base in the first axial location of the support member relative to the base is spaced from the rotational position occupied by the support member relative to the base in the second axial location by 90°.
- Desirably means is provided for retaining the support member in either of said rotational positions relative to the base.
- Conveniently the light source which the support member is arranged to receive is one end of an optical cable.
- One example of the invention is illustrated in the accompanying drawings, wherein:-
- Figure 1 is a diagrammatic sectional view of an electrical switch;
- Figure 2 is an enlarged diagrammatic representation of the base of the switch of Figure 1;
- Figures 3 and 4 are sectional views on the lines 3-3 and 4-4 respectively in Figure 2;
- Figure 5 is a longitudinal sectional view of a light source support member;
- Figures 6 and 7 are opposite end views respectively of the support member of Figure 5;
- Figure 8 is a view similar to Figure 4 of a modification;
- Figures 9 and 10 are views in the direction of arrows A and B respectively in Figure 8 with certain details omitted; and
- Figures 11 and 12 are views similar to Figures 5 and 6 of light source support members for use in the base of Figures 8 to 10.
- Referring to the drawings, the switch comprises a body 11 which is fixed in use, and which includes a moulded
synthetic resin base 12. Rotatable within the body, and extending therefrom to facilitate manual operation, is a moulded syntheticresin operating member 13. Thebase 12 carries fixed electrical contacts l4 engageable by a movableelectrical contact 15 rotatable with theoperating member 13. Theoperating member 13 is capable of both rotational movement relative to thebase 12 in a plane parallel to thebase 12, and axial movement relative to thebase 12 in the direction of the axis of rotation of the operating member relative to the base. Theoperating member 13 and the body 11 include first andsecond detent arrangements 16, 17 thedetent arrangement 16 controlling the axial positions of theoperating member 13, relative to the body, and the detent mechanism 17 defining the angular positions of the operating member relative to the body. The nature of the various sets of contacts controlled by the two movements of theoperating member 13 relative to the body are of no importance to the present invention. - The
base 12 is provided with a centrally disposed aperture, orbore 18 extending completely through the base parallel to the axis of rotational movement of theoperating member 13. Thebore 18 is a plane cylindrical bore intermediate its ends, but at its end includes a more complex shaping, the detail and purpose of which will be described hereinafter. - Engageable within the
bore 18 is a lightsource support member 19 which is moulded in synthetic resin material and which is generally in the form of a cylindrical tube the outer diameter of which is substantially equal to the inner diameter of the cylindrical region of thebore 18 and the inner diameter of which is substantially equal to the outer diameter of the ferrule provided at one end of an optical cable. Themember 19 is split axially to define first andsecond limbs end 23 only for themember 19. Theends 23 of themember 19 is the end which will be adjacent the exterior of thebase 12 in use. - At their ends remote from the
ends 23 of themember 19 thelimbs protuberance 24 the leading edge of which is tapered to define aramp 25. At itsend 23, themember 19 is provided with a diametrically opposed pair of radially outwardly extending quadrant shapedlugs 26 and as can be seen in Figures 6 and 7 one of thelugs 26 is split into two sections so that in effect the only part interconnecting the twolimbs lug 26 which is not split. It will be recognised therefore that thelimbs whole lug 26. However, additionally themember 19 can be flexed again by flexure of thewhole lug 26 in a direction to increase or reduce the diameter of themember 19 - As can be seen in Figures 5 to 7 the
protuberances 24 extend radially outwardly diametrically opposite one another as to the lugs. However, thelugs 26 are spaced from theprotuberances 24 by 90° rotationally about the longitudinal axis of themember 19. - The outermost end of the
bore 18 in the base 11 is formed with a pair of radialextensions defining recesses 26a in the outer surface of the base. The shaping of therecesses 26a conforms to the shaping of thelugs 26, and it will be recognised therefore that themember 19 can be inserted into thebore 18 and can be located angularly within thebore 18 such that thelugs 26 enter therecesses 26a. The length of themember 19 is such that when thelugs 26 are seated in therecesses 26a then theprotuberances 24 of thelimbs bore 18, and thus the shoulders define at the trailing ends of the protuberances, 24 engage theinner surface 12a, of thebase 12. The co-operation between thelugs 26 and therecesses 26a prevent rotational movement of themember 19 relative to thebase 12, and the engagement of the shoulders at the trailing ends of theprotuberances 24 with thesurface 12a of the base resists axial movement of themember 19 relative to the base. It is to be understood however that themember 19 can be removed from thebore 18 merely by flexing thelimbs protuberances 24 from thesurface 12a. It will further be recognised however that when the ferrule 20 (Figure l) at one end of an optical cable is inserted into thesupport member 19 then the presence of the ferrule will prevent such inward flexure of thelimbs support member 19 thesupport member 19 cannot be moved axially or rotationally relative to thebase 12. - As mentioned above when the
lugs 26 of themember 19 are seated in therecesses 26a of thebase 12, then the free ends of thelimbs member 19 project inwardly from theinner surface 12a of the base. - The free ends of the
limbs member 13 relative to the body 11. Thus should an attempt be made to move theoperating member 13 axially towards thebase 12, then such movement of the operating member will be prevented by abutment of the operating member with the free ends of thelimbs support member 19 in a fully inserted position wherein thelugs 26 are seated in therecesses 26a and the ferrule 20 is present within themember 19, the switch is capable only of operation as a rotary switch. - At the innermost end of the
bore 18 in thebase 12 and spaced around the circumference of thebore 18 by 900 from therecesses 26a is a diametrically opposed pair of axially extendinggrooves 24a. The depth of thegrooves 24a is such that theprotuberances 24 can be accommodated therein with the remainder of the length of thelimbs bore 18. In order to position thesupport member 19 with theprotuberances 24 engaged in thegrooves 24a the ferrule 20 is first removed and themember 19 is partially withdrawn from thebore 18 as permitted by inward flexure of thelimbs member 19 is then rotated through 90° with respect to thebase 12 so that theprotuberances 24 align with thegrooves 24a and into thegrooves 24a by virtue of the inherent resilience of themember 19. In this position of course thelugs 26 are both axially and angularly spaced from therecesses 26a and the under surfaces of thelugs 26 now engage the outer surface of thebase 12. The ferrule 20 is then reinserted into thesupport member 19 and again serves to prevent inward flexure of thelimbs member 19 angular movement of themember 19 relative to the base , 12 is prevented by the engagement of theprotuberances 24 in thegrooves 24a and axial movement of themember 19 relative to thebase 12 is prevented in one direction by engagement of thelugs 26 with the outer surface of thebase 12 and in the other direction by engagement of the shoulders of theprotuberances 24 with the ends of thegrooves 24a. The axial length of thegrooves 24a is equal to the axial length of theprotuberances 24 and thus in this, the second axial position of themember 19 relative to thebase 12 the free ends of thelimbs inner surface 12a of the base and thus do not impede axial movement of theoperating member 13 towards thebase 12. - The inner surface of the
member 19 is shaped at 27 to conform to the ferrule 20, so that a latching effect is achieved between the ferrule and themember 19 when the ferrule is inserted. The latching effect is sufficient to resist a relatively low axial loading tending to withdraw the ferrule from themember 19, but of course upon application of a definite pulling force the ferrule 20 can be removed to permit movement of themember 19 relative to thebase 12 between its first and second axial positions. - It will be recognised that in the foregoing description the locking element defined by the end regions of the
limbs member 19 serve to block axial movement of theoperating member 13 relative to thebase 12. However, if desired by modification of the inter-relationship between the free ends of thelimbs operating member 13, themember 19 in its first axial position can serve to prevent part or all of the otherwise possible rotational movement of theoperating member 13 relative to thebase 12, while permitting the axial movement of the operating member relative to thebase 12. - In the modification shown in Figures 8 to 12 the light
source support member 19 is arranged positively to be retained in thebase 12 irrespective of whether or not a light source is engaged therein. Thebore 18 is formed in its wall with a pair of axially extendinggrooves 31 which receivelugs 32 of themember 19 during insertion of themember 19 into thebore 18. At its inner end the wall of thebore 18 is formed with a diametrically opposed pair of segment shapedrecesses 32a in which thelugs 32 of themember 19 can be received upon rotation of themember 19 within thebore 18. When thelugs 32 engage in therecesses 32a withdrawal of themember 19 is resisted and reverse rotation of themember 19 to realign thelugs 32 with thegrooves 31 is resisted by engagement ofpips 34 on the outer faces ofprojections 33 of the base indimples 34a inlugs 26 of themember 19. The height of theprojections 33 is equal to the depth of therecesses 32a and themember 19 is alternatively engageable with the base in axial position such that thelugs 32 project beyond the end of thebore 18 rather than being housed in therecesses 32a. To achieve this alternative position of themember 19 relative to thebase 12 themember 19 is inserted through thebore 18 until thelugs 26 engage the outer face of thebase 12 between theprojections 33 and thelugs 32 project from the inner end of thebore 18. Themember 19 is then rotated to engage thelugs 32 with thesurface 12a of the base to resist withdrawal of themember 19. Reverse rotation of themember 19 to re-align thelugs 32 with thegrooves 31 is resisted by engagement ofpips 35, on the base 12 between theprojections 33, indimples 35a in thelugs 26. Thus themember 19 has two alternative axial positions relative to thebase 12 and in both positions withdrawal of themember 19 is resisted by thelugs 32. Similarly unintentional rotation of themember 19 in either of its axial positions, to permit withdrawal is resisted by interengagement of dimples on thelugs 26 and projections on the outer face of thebase 12. The operation of a switch incorporating this modification is as described with reference to Figures 1 to 7. - Moreover, while in the examples described above the light source to be received within the light
source support member 19 is the ferrule of one end of an optical cable, it is to be understood that the light source could be a bulb holder containing an incandescent bulb. - It can be seen therefore that in effect two basic switches can be manufactured using the same components. The first switch has the facility for both rotational and axial movement of the operating member, that is to say when the
support member 19 occupies its second axial psotion, whereas the second switch defined by themember 19 being in its first axial position, has a restricted facility of movement of the operatingmember 13 relative to the base.
Claims (7)
1. An electrical switch comprising a body including a base, an operating member supported by the body for rotational and axial movement relative thereto, an aperture extending through the base and a.light source support member received in said aperture, said support member and the wall of the aperture being so shaped that the support member can be located in the base in,either of first and second different axial positions relative to the base, and the support member including a blocking element, which in the first axial location of the support member relative to the base, extends into the path of either axial or rotational movement of the operating member relative to the body to prevent such movement of the operating member relative to the body, the second location of the support member relative to the base being such that said blocking element lies out of the path of either axial or rotational movement of the operating member so that both movements of the operating member relative to the body are permitted.
2. An electrical switch as claimed in claim 1 wherein both of said first and second locations of said support member relative to said base, axial and rotational movement of the support member relative to the base is resisted by engagement of abutting surfaces on the support member and the base, said support member being flexible to permit said abutting surfaces to be disengaged, and engagement of a light source in said support member preventing such flexure of the support member.
3. An electrical switch as claimed in claim 1 or claim 2 wherein the support member occupies different rotational positions relative to the base in the first and second axial locations respectively.
4. An electrical switch as claimed in claim 3 wherein the rotational position occupied by the support member relative to the base in the first axial location of the support member relative to the base is spaced from the rotational position occupied by the support member relative to the base in the second axial location by 90°.
5. An electrical switch as claimed in claim 3 or claim 4 wherein means is provided for retaining the support member in either of said rotational positions relative to the base.
6. An electrical switch as claimed in any one of claims 1 to 5 wherein the light source which the support member is arranged to receive is one end of an optical cable.
7. An electrical switch substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3307078 | 1978-08-11 | ||
GB7833070 | 1978-08-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0008866A1 true EP0008866A1 (en) | 1980-03-19 |
Family
ID=10498997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79301509A Withdrawn EP0008866A1 (en) | 1978-08-11 | 1979-07-30 | Electrical switches |
Country Status (5)
Country | Link |
---|---|
US (1) | USRE31557E (en) |
EP (1) | EP0008866A1 (en) |
JP (1) | JPS5528293A (en) |
ES (1) | ES483338A1 (en) |
PL (1) | PL217682A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0286106A2 (en) * | 1987-04-08 | 1988-10-12 | Hitachi, Ltd. | Process for manufacturing a superconductive device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6010012U (en) * | 1983-06-30 | 1985-01-23 | 松下電工株式会社 | insulated decorative ceiling |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2263754A (en) * | 1938-06-16 | 1941-11-25 | Standard Mfg Co | Multiplex switch |
DE6802262U (en) * | 1968-10-15 | 1969-04-24 | Elektro Mechanische Praez S We | MINIATURE SWITCH WITH PYRAMID-SHAPED PLUG |
DE2241620A1 (en) * | 1972-08-24 | 1974-03-07 | Baer Elektrowerke Kg | ELECTRICAL SWITCHING DEVICE |
AU465886B2 (en) * | 1973-10-12 | 1975-10-09 | Square D Company | Miniature oil-tight pushbutton and selector switch assembly and improved contact unit therefor |
DE2604856A1 (en) * | 1975-02-11 | 1976-08-19 | Lucas Electrical Co Ltd | ELECTRIC SWITCH |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2273353A (en) * | 1940-02-23 | 1942-02-17 | Oran P Harris | Illuminated push button switch |
US2744185A (en) * | 1952-08-15 | 1956-05-01 | Cadre Ind Corp | Illuminated knob |
US2786904A (en) * | 1954-05-13 | 1957-03-26 | Gen Railway Signal Co | Control switch for railway traffic controlling systems |
US3215806A (en) * | 1962-03-12 | 1965-11-02 | Mackworth G Rees Division Of A | Push-pull switch |
DE2243639C3 (en) * | 1972-09-06 | 1982-05-13 | Rudolf Schadow Gmbh, 1000 Berlin | Slide switch |
-
1979
- 1979-07-30 EP EP79301509A patent/EP0008866A1/en not_active Withdrawn
- 1979-08-10 ES ES483338A patent/ES483338A1/en not_active Expired
- 1979-08-10 PL PL21768279A patent/PL217682A1/xx unknown
- 1979-08-10 JP JP10140779A patent/JPS5528293A/en active Pending
-
1981
- 1981-05-07 US US06/261,456 patent/USRE31557E/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2263754A (en) * | 1938-06-16 | 1941-11-25 | Standard Mfg Co | Multiplex switch |
DE6802262U (en) * | 1968-10-15 | 1969-04-24 | Elektro Mechanische Praez S We | MINIATURE SWITCH WITH PYRAMID-SHAPED PLUG |
DE2241620A1 (en) * | 1972-08-24 | 1974-03-07 | Baer Elektrowerke Kg | ELECTRICAL SWITCHING DEVICE |
AU465886B2 (en) * | 1973-10-12 | 1975-10-09 | Square D Company | Miniature oil-tight pushbutton and selector switch assembly and improved contact unit therefor |
DE2604856A1 (en) * | 1975-02-11 | 1976-08-19 | Lucas Electrical Co Ltd | ELECTRIC SWITCH |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0286106A2 (en) * | 1987-04-08 | 1988-10-12 | Hitachi, Ltd. | Process for manufacturing a superconductive device |
EP0286106B1 (en) * | 1987-04-08 | 1995-08-02 | Hitachi, Ltd. | Process for manufacturing a superconductive device |
Also Published As
Publication number | Publication date |
---|---|
USRE31557E (en) | 1984-04-17 |
PL217682A1 (en) | 1980-08-11 |
ES483338A1 (en) | 1980-04-01 |
JPS5528293A (en) | 1980-02-28 |
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