EP0088196A2 - Switch operating device and table lamp incorporating such device - Google Patents
Switch operating device and table lamp incorporating such device Download PDFInfo
- Publication number
- EP0088196A2 EP0088196A2 EP82307046A EP82307046A EP0088196A2 EP 0088196 A2 EP0088196 A2 EP 0088196A2 EP 82307046 A EP82307046 A EP 82307046A EP 82307046 A EP82307046 A EP 82307046A EP 0088196 A2 EP0088196 A2 EP 0088196A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- members
- projecting
- face
- plunger
- switch
- 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.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/04—Cases; Covers
- H01H21/10—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
Definitions
- the present invention relates to a device for operating a switch, such as a micro switch, and to a table lamp incorporating such a switch operating device.
- the present invention provides a switch operating device comprising first and second members movable relatively to each other between first and second positions; said first member including two spaced apart elements projecting from a first face thereof; each element having oppositely directed cam surfaces meeting at the furtherestpoint from said face; said second member including a second face portion opposite and parallel to said first face of said first member and two plunger members projecting from said second face portion and spaced apart by a distance equal to the distance between the said elements projecting from the first member, said plungers operating against resilient means, whereby when said members are in said first position each plunger is in contact with one cam surface of each said projecting element and when said members are in said second position each plunger is in contact with the other cam surface of each projecting element; one of said members including first means operable to close contact elements in a switch to complete an electrical circuit, and the other said member including second means to operate said first means when said members are in one of said first or second positions.
- said first means comprises a resiliently loaded plunger projecting from one said face and arranged to close said contact elements when depressed against said resilient means and said second means comprising a third element projecting from said other face and arranged to depress said plunger when the said members are in one of the first or second positions.
- the first member preferably includes an annular portion and said first and second projecting elements are positioned at each end of a diameter thereof, relative movement between said first and second members being effected by rotation of one of said members, whereby the plungers projecting from said second face are in contact with the opposite cam surfaces of said projecting elements when viewed along a line parallel to the said diameter when the said first and second members are in one of said first or second positions.
- cam faces of said.projecting means may be of any desired-shape, for example they may be straight, in which instance the elements will be triangular in shape, or they may be convex, in which instance the elements may be hemispherical in shape.
- the means projecting from the face portion of said second member may be a spring loaded plunger.
- the switch operated by the first mentioned plunger may conveniently be a micro-switch.
- a stop means may be provided to restrain relative movement of said first and second members beyond said first or second position.
- the said stop means may comprise a lug projecting from one of said first or second members and movable relatively to two fixed abutments formed on or in the other said member, whereby said lug contacts one abutment when the members are in the said first position and the other abutment when the members are in the said second position.
- the invention provides a table lamp incorporating the above defined switch operating device, at least one of said members being located in the base of said lamp and the other on the stem thereof, the said stem being rotatably mounted on the said base, whereby rotation of the stem in one direction moves the said members from the said first to the said second position and rotation of the stem in the opposite direction moves the members from the said second to the said first position.
- FIG. 1 form an exploded representation of a table lamp and switch operating device of the present invention, viewed from above.
- a metal table lamp base 1 includes a cylindrical hollow portion 2 in which is located an annular nylon member 3 containing a second concentric annular nylon member 4 in non-rotatable engagement with each other and with base 1. Attached to base 1 is a vertical electrically conducting member 5 having a threaded top portion 6 which extends through and is concentric with annular member 4 to provide an annular gap 7 therebetween.
- Annular member 3 includes a flat upper face 8 containing four hemispherical recesses 9 in which are located ball bearings 10,
- Stem 11 contains an axial passageway 12 of circular cross-section and a short downwardly extending cylindrical portion 13 concentric with and having the same internal diameter as passageway 12.
- a shoulder 14 provides an annular face 15 at bottom of stem 11.
- Upper face 1 6 of stem 11 includes three hemispherical recesses 17 in which are located ball bearings 18, a fourth ball bearing 19 is located on a spring 20 contained in cylindrical recess 21, the length of spring 20 being sufficient to cause ball bearing 19 to project outwardly of face 16 to a greater extent than ball bearings 18.
- a lower locking member 22 contains a screw threaded passageway 23 for engagement on screw threaded portion 6 of member 5 and an upper locking member 24 contains a concentric axial passageway, the lower portion thereof (not illustrated) being threaded for engagement with screw threaded portion 6 of member 5, and the upper portion 25, of smaller diameter, being screw threaded to receive threaded joining element 26.
- a conventional lamp holder 27 is internally screw threaded .to engage with element 26 to affix said lamp holder to said stem.
- An annular brass plate 30 is non-rotatably attached to the lower face of stem 11 by means of screws 31 which pass through holes 38 plunged through plate 30.
- Holes 33 and 34 are formed at opposite ends of a diameter of plate 30 and are concentric with cylindrical passageways having closed ends that are formed in the lower face of stem 11.
- the said cylindrical passageways are of greater diameter than holes 33 and 34 and receive plungers 35 and 36 the lower portions 37 and 38 of which are smaller in diameter than the upper portions and pass through holes 33 and 34 in plate 30.
- Shoulders 39 and 40 formed between the upper and lower portions of plungers 35 and 36 rest on plate 30 thus allowing only the lower portions 37 and 38 to project from plate 30.
- the plungers are urged outwardly by compression springs 41 and 42.
- a switch operated plunger 50 is located in a cylindrical recess in the base of section 11 and projects through hole 51 in plate 30 under the influence of compression spring 53, shoulder 52 resting on plate 30 to retain the upper portion of the plunger and spring 53 in the said recess.
- a lug 54 projects horizontally from plate 30 at a position dimetri- cally opposite to plunger 50.
- Nylon insert member 4 is provided with a flat horizontal face 60 from which projects two integral triangular members 61 and 62 having cam faces 61a, 61b and 62a, 62b respectively. Members 61 and 62 are located at either end of a diameter of insert 4. A flat arcuate shaped brass plate 63 is located on face 60 between cam faces 61b and 62b of members 61 and 62.
- a micro-switch 64 is contained within insert member 4-and has an off/on actuating plunger 65 projecting through a hole in brass plate 63 adjacent one end thereof.
- the said switch is connected in an electrical circuit between the lamp holder and mains supply leads (not shown). The switch is actuated to close the said circuit when plunger 65 is depressed.
- An arcuate recess 70 having vertical faces 71 and 72 is formed in insert 3 on the opposite side thereof to brass plate 63 located on member 4 and is dimensioned to receive lug 54 of plate 30.
- the lamp of figure s 1 and 2 in the assembled condition and with switch 64 in the off position, has stem 11 located on member 5 with locking rings 22 and 24 engaging threaded portion 6, ring 22 bearing down on ball bearings 18 and 19 with sufficient pressure to prevent any vertical movement of stem 11 on member 5 and locking member 24 preventing inadvertant.removal pf locking member 22.
- stem 11 located on member 5 with locking rings 22 and 24 engaging threaded portion 6, ring 22 bearing down on ball bearings 18 and 19 with sufficient pressure to prevent any vertical movement of stem 11 on member 5 and locking member 24 preventing inadvertant.removal pf locking member 22.
- extending cylindrical portion 13 of stem 11 is received within the annular gap 7 between member 5 and nylon insert 4 and the annular faces 15 of stem 11 is rotatable on ball bearings 10.
- Plunger 35 and 36 of stem portions 37 and 38 are in contact with face 60 of member 4 and cam faces 61a and 62b of elements 61 and 62 respectively; lug 54 of plate 30 is received within recess 70 and in engagement with face 72 thereof.
- a switch operating plunger 37 has a lower end portion with a flat portion 50a in contact with plate 63 at the opposite end thereof to micro-switch plunger 65, contact between portion 50a of switch 37 and plate 63 being maintained under the influence of compression spring 53.
- stem 11 In order to move micro-switch 64 into closed position, i.e. to turn "on” the lamp, stem 11 is rotated in a clockwise direction. As the rotation starts plungers 35 and 37 are moved up cam faces 61a and 62b ofelements 61 and 62 respectively, the plungers retracting in to the lower end of stem 11 against the springs 41 and 42.. When the plungers move over the apex of element 61 and 62 they then move down cam faces 61b and 62a under the influence of spring 41 and 42 until they reach the level of face 60.
- stemll is rotated in an anti-clockwise direction to cause plungers 35 and 36 to move up cam faces 61b and 62a against springs 41 and 42 and subsequently to move down cam faces 61a and 62b under the influence of the said springs.
- Undue rotation of stem 11 being prevented by engagement of lug 54 against face 72 of recess 70 as previously noted.
- Springs 41 and 42 are sufficiently strong to provide a position on completion of the switch operation once plunger 35 and 36 are passed over the apex of elements 61 and 62 and also to resist inadvertant rotation in the opposite direction, thereby providing that face 50a of plunger 37 is positively maintained in or out of contact with micro-switch actuating plunger 65.
- Microrawitch 64 may be located in recess formed in insert 4 by any suitable means, that maintains the switch in a stationary position with its actuating plunger 65 projecting through its respective hole in plate 63 when the switch is in the off position.
- Micro-switch 64 may be replaced by any suitable switching means that can be actuated by a plunger projecting through lug 63.
Abstract
Description
- The present invention relates to a device for operating a switch, such as a micro switch, and to a table lamp incorporating such a switch operating device.
- From one aspect the present invention provides a switch operating device comprising first and second members movable relatively to each other between first and second positions; said first member including two spaced apart elements projecting from a first face thereof; each element having oppositely directed cam surfaces meeting at the furtherestpoint from said face; said second member including a second face portion opposite and parallel to said first face of said first member and two plunger members projecting from said second face portion and spaced apart by a distance equal to the distance between the said elements projecting from the first member, said plungers operating against resilient means, whereby when said members are in said first position each plunger is in contact with one cam surface of each said projecting element and when said members are in said second position each plunger is in contact with the other cam surface of each projecting element; one of said members including first means operable to close contact elements in a switch to complete an electrical circuit, and the other said member including second means to operate said first means when said members are in one of said first or second positions.
- Preferably said first means comprises a resiliently loaded plunger projecting from one said face and arranged to close said contact elements when depressed against said resilient means and said second means comprising a third element projecting from said other face and arranged to depress said plunger when the said members are in one of the first or second positions.
- The first member preferably includes an annular portion and said first and second projecting elements are positioned at each end of a diameter thereof, relative movement between said first and second members being effected by rotation of one of said members, whereby the plungers projecting from said second face are in contact with the opposite cam surfaces of said projecting elements when viewed along a line parallel to the said diameter when the said first and second members are in one of said first or second positions.
- The cam faces of said.projecting means may be of any desired-shape, for example they may be straight, in which instance the elements will be triangular in shape, or they may be convex, in which instance the elements may be hemispherical in shape.
- The means projecting from the face portion of said second member may be a spring loaded plunger.
- The switch operated by the first mentioned plunger may conveniently be a micro-switch.
- A stop means may be provided to restrain relative movement of said first and second members beyond said first or second position.
- The said stop means may comprise a lug projecting from one of said first or second members and movable relatively to two fixed abutments formed on or in the other said member, whereby said lug contacts one abutment when the members are in the said first position and the other abutment when the members are in the said second position.
- From another aspect the invention provides a table lamp incorporating the above defined switch operating device, at least one of said members being located in the base of said lamp and the other on the stem thereof, the said stem being rotatably mounted on the said base, whereby rotation of the stem in one direction moves the said members from the said first to the said second position and rotation of the stem in the opposite direction moves the members from the said second to the said first position.
- One embodiment of the present invention will now be described with reference to the accompanying drawings in which figures 1 and 2 form an exploded representation of a table lamp and switch operating device of the present invention, viewed from above.
- A metal
table lamp base 1 includes a cylindrical hollow portion 2 in which is located anannular nylon member 3 containing a second concentricannular nylon member 4 in non-rotatable engagement with each other and withbase 1. Attached tobase 1 is a vertical electrically conductingmember 5 having a threadedtop portion 6 which extends through and is concentric withannular member 4 to provide anannular gap 7 therebetween. -
Annular member 3 includes a flat upper face 8 containing fourhemispherical recesses 9 in which are locatedball bearings 10, -
Stem 11 contains an axial passageway 12 of circular cross-section and a short downwardly extendingcylindrical portion 13 concentric with and having the same internal diameter as passageway 12. Ashoulder 14 provides anannular face 15 at bottom ofstem 11. -
Upper face 1 6 ofstem 11 includes threehemispherical recesses 17 in which are locatedball bearings 18, a fourth ball bearing 19 is located on aspring 20 contained in cylindrical recess 21, the length ofspring 20 being sufficient to cause ball bearing 19 to project outwardly offace 16 to a greater extent thanball bearings 18. - A lower locking member 22 contains a screw threaded
passageway 23 for engagement on screw threadedportion 6 ofmember 5 and anupper locking member 24 contains a concentric axial passageway, the lower portion thereof (not illustrated) being threaded for engagement with screw threadedportion 6 ofmember 5, and theupper portion 25, of smaller diameter, being screw threaded to receive threaded joiningelement 26. A conventional lamp holder 27 is internally screw threaded .to engage withelement 26 to affix said lamp holder to said stem. - An
annular brass plate 30 is non-rotatably attached to the lower face ofstem 11 by means ofscrews 31 which pass throughholes 38 plunged throughplate 30.Holes plate 30 and are concentric with cylindrical passageways having closed ends that are formed in the lower face ofstem 11. The said cylindrical passageways are of greater diameter thanholes plungers lower portions holes plate 30.Shoulders 39 and 40 formed between the upper and lower portions ofplungers plate 30 thus allowing only thelower portions plate 30. The plungers are urged outwardly bycompression springs - A switch operated
plunger 50 is located in a cylindrical recess in the base ofsection 11 and projects throughhole 51 inplate 30 under the influence ofcompression spring 53, shoulder 52 resting onplate 30 to retain the upper portion of the plunger andspring 53 in the said recess. Alug 54 projects horizontally fromplate 30 at a position dimetri- cally opposite to plunger 50. - Nylon
insert member 4 is provided with a flathorizontal face 60 from which projects two integraltriangular members cam faces Members insert 4. A flat arcuate shapedbrass plate 63 is located onface 60 betweencam faces 61b and 62b ofmembers - A
micro-switch 64 is contained within insert member 4-and has an off/on actuatingplunger 65 projecting through a hole inbrass plate 63 adjacent one end thereof. The said switch is connected in an electrical circuit between the lamp holder and mains supply leads (not shown). The switch is actuated to close the said circuit whenplunger 65 is depressed. - An
arcuate recess 70 havingvertical faces insert 3 on the opposite side thereof tobrass plate 63 located onmember 4 and is dimensioned to receivelug 54 ofplate 30. - The lamp of figure s 1 and 2 in the assembled condition and with
switch 64 in the off position, hasstem 11 located onmember 5 withlocking rings 22 and 24 engaging threadedportion 6, ring 22 bearing down onball bearings stem 11 onmember 5 and lockingmember 24 preventing inadvertant.removal pf locking member 22. In this condition extendingcylindrical portion 13 ofstem 11 is received within theannular gap 7 betweenmember 5 andnylon insert 4 and theannular faces 15 ofstem 11 is rotatable onball bearings 10.Plunger stem portions face 60 ofmember 4 andcam faces elements lug 54 ofplate 30 is received withinrecess 70 and in engagement withface 72 thereof. Aswitch operating plunger 37 has a lower end portion with aflat portion 50a in contact withplate 63 at the opposite end thereof tomicro-switch plunger 65, contact betweenportion 50a ofswitch 37 andplate 63 being maintained under the influence ofcompression spring 53. - In order to move micro-switch 64 into closed position, i.e. to turn "on" the lamp,
stem 11 is rotated in a clockwise direction. As the rotation startsplungers cam faces 62b ofelements stem 11 against thesprings element spring face 60. During rotation ofstem 11lug 5 moves aroundrecess 70 into engagement withface 71 and simultaneously plunger 37 moves overplate 63 and face 50a contacts and depresses micro-switch actuatingplunger 65 at the same time asplungers element stem 11 in a clockwise direction, which would causeface 50a ofplunger 37 to move out of contact with actuatingplunger 65, is prevented by the aforesaid engagement oflug 5 withface 71 ofrecess 70. Inadvertant rotation in the opposite direction is prevented by the engagement ofplungers face 61b and 62a ofelements - To return the switch to the "off" position, stemll is rotated in an anti-clockwise direction to cause
plungers cam faces 61b and 62a againstsprings cam faces stem 11 being prevented by engagement oflug 54 againstface 72 ofrecess 70 as previously noted. - Springs 41 and 42 are sufficiently strong to provide a position on completion of the switch operation once plunger 35 and 36 are passed over the apex of
elements face 50a ofplunger 37 is positively maintained in or out of contact with micro-switch actuatingplunger 65. - Microrawitch 64 may be located in recess formed in
insert 4 by any suitable means, that maintains the switch in a stationary position with its actuatingplunger 65 projecting through its respective hole inplate 63 when the switch is in the off position. - Micro-switch 64 may be replaced by any suitable switching means that can be actuated by a plunger projecting through
lug 63.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8138615 | 1981-12-22 | ||
GB08138615A GB2112572B (en) | 1981-12-22 | 1981-12-22 | Electrical switch operating device and table lamp incorporating such device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0088196A2 true EP0088196A2 (en) | 1983-09-14 |
EP0088196A3 EP0088196A3 (en) | 1985-12-18 |
Family
ID=10526776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82307046A Ceased EP0088196A3 (en) | 1981-12-22 | 1982-12-22 | Switch operating device and table lamp incorporating such device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0088196A3 (en) |
GB (1) | GB2112572B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007033406A1 (en) * | 2005-09-26 | 2007-03-29 | Neoz Pty Ltd | Lamp system particularly for cordless lamps |
AU2006294402B2 (en) * | 2005-09-26 | 2010-07-22 | Neoz Pty Ltd | Lamp system particularly for cordless lamps |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR687897A (en) * | 1930-01-09 | 1930-08-14 | Rotating switch specially for electric candle holders | |
GB653545A (en) * | 1948-10-25 | 1951-05-16 | New Day Electrical Accessories | Improvements in and relating to rotary electric switches |
US2790041A (en) * | 1953-06-22 | 1957-04-23 | Colonial Premier Company | Electric switch actuating mechanism |
US3193653A (en) * | 1963-04-01 | 1965-07-06 | Crouse Hinds Co | Switch detent arrangement |
US3956606A (en) * | 1974-04-25 | 1976-05-11 | Material Control, Inc. | Cable operated safety stop switch |
-
1981
- 1981-12-22 GB GB08138615A patent/GB2112572B/en not_active Expired
-
1982
- 1982-12-22 EP EP82307046A patent/EP0088196A3/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR687897A (en) * | 1930-01-09 | 1930-08-14 | Rotating switch specially for electric candle holders | |
GB653545A (en) * | 1948-10-25 | 1951-05-16 | New Day Electrical Accessories | Improvements in and relating to rotary electric switches |
US2790041A (en) * | 1953-06-22 | 1957-04-23 | Colonial Premier Company | Electric switch actuating mechanism |
US3193653A (en) * | 1963-04-01 | 1965-07-06 | Crouse Hinds Co | Switch detent arrangement |
US3956606A (en) * | 1974-04-25 | 1976-05-11 | Material Control, Inc. | Cable operated safety stop switch |
Also Published As
Publication number | Publication date |
---|---|
GB2112572A (en) | 1983-07-20 |
GB2112572B (en) | 1986-01-02 |
EP0088196A3 (en) | 1985-12-18 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR LI NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
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AK | Designated contracting states |
Designated state(s): AT BE CH DE FR LI NL SE |
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17P | Request for examination filed |
Effective date: 19860614 |
|
17Q | First examination report despatched |
Effective date: 19861030 |
|
R17C | First examination report despatched (corrected) |
Effective date: 19870703 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
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18R | Application refused |
Effective date: 19890126 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CRESSWELL, TERRENCE |