EP0163981A2 - Detachable connection for a pipe to the bottom of a holder, particularly of a screwed lamp holder - Google Patents
Detachable connection for a pipe to the bottom of a holder, particularly of a screwed lamp holder Download PDFInfo
- Publication number
- EP0163981A2 EP0163981A2 EP85105779A EP85105779A EP0163981A2 EP 0163981 A2 EP0163981 A2 EP 0163981A2 EP 85105779 A EP85105779 A EP 85105779A EP 85105779 A EP85105779 A EP 85105779A EP 0163981 A2 EP0163981 A2 EP 0163981A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- holder
- pipe
- hole
- holder bottom
- asymmetrical
- 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- Withdrawn
Links
Images
Classifications
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/006—Fastening of light sources or lamp holders of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base
-
- 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
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/10—Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards
Definitions
- the invention relates to the detachable connection of a pipe to the bottom of an insulating holder, particularly a screwed holder used for securing electric lamps.
- a successive disadvantage of such a connection is a permanent set of the pipe thread due to the sharp tip engaging it and thus making it difficult and, sometimes, preventing the pipe from being screwed out of the holder bottom hole.
- the aim of the present invention is to simplify the design to facilitate the operation and to increase the number of the cavities of the pressing moulds during the manufacture of the holder bottoms and to eliminate the effect of the physical properties of the connecting parts on connection reliability.
- This aim has been achieved by providing a design of the detachable connection of the pipe to the holder bottom, that design involving mounting in the cylindrical holder bottom hole a pipe end with a transversely and outwardly bent circumferential fragment of the pipe wall end in the form of a ring sector mounted in the space of an offset asymmetrical holder bottom hole being rectangular in its cross-section, preferably between a square nut and the bottom edge of that hole.
- the invention is specifically characterized in that the set screw unit is mounted in parallel to the pipe axis in an offset, asymmetrical, rectangular-sectioned holder bottom hole and that a transversely and outwardly bent circumferential wall end fragment of pipe in the form of a ring sector is mounted inside the offset, asymmetrical, rectangular-sectioned hole of holder bottom, preferably between a square nut of the set screw unit and a bottom edge of the offset, asymmetrical, rectangular-sectioned hole of holder bottom.
- this present connection is characterised by a simple design which is functional to operate and cheap to manufacture.
- Fig. 1 shows the vertical view of a section of a fragment of the holder bottom, inclusive of the pipe and the set screw unit, and
- Fig. 2 the top view of the holder bottom as per Fig. 1.
- the size of the transversely and outwardly bent circumferential fragment of pipe 1 wall end in the form of ring sector 5 has been selected in relation to the width of the offset asymmetrical hole being rectangular in its cross section, located in holder bottom 2 and mounting that sector 5 that it prevents in its turn pipe 1 from being angularly shifted in holder bottom 2.
- the length difference of the bases of the offset asymmetrical hole being rectangular in its cross section, located in holder bottom 2 and mounting square nut 4 that together with set screw 3 forms a set screw unit and the taper of the hole wall opposite to pipe 1, as resulting from that difference, is somewhat larger than the width of the transversely and outwardly bent circumferential fragment of the wall end of pipe 1 in the form of ring sector 5, which allows the end of pipe 1 to be freely introduced into the cylindrical hole of that bottom at the upper position of square nut 4 of the offset, asymmetrical rectangular-sectioned hole of holder bottom 2.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Road Signs Or Road Markings (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
Description
- The invention relates to the detachable connection of a pipe to the bottom of an insulating holder, particularly a screwed holder used for securing electric lamps.
- The hitherto known and used designs of the detachable connection of the pipe to the holder bottom, as for example that of the firm ZSE Silnoprouda Elektrotechnika "Elektro-Praga", Jablonec Nad Nisou, CSSR, published in the catalogue of 1975, pp. 6 to 9, objimky zarovek maleho a nizkoho napeti, involve screwing the screwed end of the pipe into.the tapped holder bottom hole and preventing the holder from screwing off the pipe by tightening a set screw unit mounted in a hole adjacent to the holder axis by means of a single-sided engagement of the sharp-pointed tip of that unit with the pipe thread profile.
- The basic disadvantage of such a design is that the process of making such holder bottoms is difficult, involving screwing out the press mould cores, the moulds being used for pressing the thread of the hole. The intricate design of the moulds for pressing the holder bottoms due to the extensive mechanismus used for screwing out the thread cores restricts in its turn the number of mould cavities and, in addition makes difficult their operation and maintenance.
- Another disadvantage of such a design is the necessity for threading both the ends of the pipe.
- An additional disadvantage of the previous connection is the necessity for satisfying the requirement that the hardness of the tip of the set screw unit should be much higher than that of the pipe material since, otherwise, the tip would be blunted by the pipe thread without actually locking the pipe in the holder bottom.
- A successive disadvantage of such a connection is a permanent set of the pipe thread due to the sharp tip engaging it and thus making it difficult and, sometimes, preventing the pipe from being screwed out of the holder bottom hole.
- Allowing for the mass nature of the production, the above factors provide for an essential source of inconveniences of the design in the process of manufacturing and applying the holders.
- The aim of the present invention is to simplify the design to facilitate the operation and to increase the number of the cavities of the pressing moulds during the manufacture of the holder bottoms and to eliminate the effect of the physical properties of the connecting parts on connection reliability.
- This aim has been achieved by providing a design of the detachable connection of the pipe to the holder bottom, that design involving mounting in the cylindrical holder bottom hole a pipe end with a transversely and outwardly bent circumferential fragment of the pipe wall end in the form of a ring sector mounted in the space of an offset asymmetrical holder bottom hole being rectangular in its cross-section, preferably between a square nut and the bottom edge of that hole.
- In a detachable connection of a pipe to the bottom of a holder, particularly a screwed lamp-holder, wherein the pipe end mounted in a cylindrical holder bottom hole is prevented from linearly and angularly shifting in relation to the holder bottom by means of a set screw unit the invention is specifically characterized in that the set screw unit is mounted in parallel to the pipe axis in an offset, asymmetrical, rectangular-sectioned holder bottom hole and that a transversely and outwardly bent circumferential wall end fragment of pipe in the form of a ring sector is mounted inside the offset, asymmetrical, rectangular-sectioned hole of holder bottom, preferably between a square nut of the set screw unit and a bottom edge of the offset, asymmetrical, rectangular-sectioned hole of holder bottom.
- As per this present invention, this present connection is characterised by a simple design which is functional to operate and cheap to manufacture.
- The subject of this present invention is embodied in the drawing whose
- Fig. 1 shows the vertical view of a section of a fragment of the holder bottom, inclusive of the pipe and the set screw unit, and
- Fig. 2 the top view of the holder bottom as per Fig. 1.
- As presented in Figs. 1 and 2, the linear shift of pipe 1 in relation to
holder bottom 2 is prevented by a set screw unit consisting ofscrew 3 andsquare nut 4, the latter pressing a transversely and outwardly bent circumferential fragment of the wall end of pipe 1 in the form ofring sector 5 against abottom edge 6 of an offsetasymmetrical holder bottom 2 hole being rectangular in its cross-section. - The size of the transversely and outwardly bent circumferential fragment of pipe 1 wall end in the form of
ring sector 5 has been selected in relation to the width of the offset asymmetrical hole being rectangular in its cross section, located inholder bottom 2 and mounting thatsector 5 that it prevents in its turn pipe 1 from being angularly shifted inholder bottom 2. The length difference of the bases of the offset asymmetrical hole being rectangular in its cross section, located inholder bottom 2 and mountingsquare nut 4 that together with setscrew 3 forms a set screw unit and the taper of the hole wall opposite to pipe 1, as resulting from that difference, is somewhat larger than the width of the transversely and outwardly bent circumferential fragment of the wall end of pipe 1 in the form ofring sector 5, which allows the end of pipe 1 to be freely introduced into the cylindrical hole of that bottom at the upper position ofsquare nut 4 of the offset, asymmetrical rectangular-sectioned hole ofholder bottom 2. The maximum screwing in ofscrew 3 into the hole ofsquare nut 4 causes the latter to move to the position at which it presses the circumferential wall end fragment of pipe 1 in the form ofring sector 5 against the surface ofbottom edge 6 of the offset, asymmetrical rectangular-sectioned hole ofholder bottom 2 and prevents pipe 1 from being inadvertently disconnected fromholder bottom 2.
Claims (1)
- A detachable connection of a pipe (1) to the bottom (2) of a holder, particularly a screwed lamp-holder, wherein the pipe end mounted in a cylindrical holder bottom hole is prevented from linearly and angularly shifting in relation to the holder bottom (2) by means of a set screw unit (3, 4), characterized in that the set screw unit (3, 4) is mounted in parallel to the pipe axis in an offset, asymmetrical, rectangular-sectioned holder bottom hole and that a transversely and outwardly bent circumferential wall end fragment of pipe (1) in the form of a ring sector (5) is mounted inside the offset, asymmetrical, rectangular-sectioned hole of holder bottom (2), preferably between a square nut (4) of the set screw unit (3, 4) and a bottom edge (6) of the offset, asymmetrical, rectangular-sectioned hole of holder bottom (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL24762184A PL143200B1 (en) | 1984-05-10 | 1984-05-10 | Temporary fastening for attaching a tube to the bottom of a screwed lamp-holder |
PL247621 | 1984-05-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0163981A2 true EP0163981A2 (en) | 1985-12-11 |
EP0163981A3 EP0163981A3 (en) | 1988-11-17 |
Family
ID=20021736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85105779A Withdrawn EP0163981A3 (en) | 1984-05-10 | 1985-05-10 | Detachable connection for a pipe to the bottom of a holder, particularly of a screwed lamp holder |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0163981A3 (en) |
DD (1) | DD233895A5 (en) |
PL (1) | PL143200B1 (en) |
SU (1) | SU1369683A3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000002219A2 (en) * | 1998-07-04 | 2000-01-13 | Werma Signaltechnik Gmbh & Co. | Signal transmitter |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE592121C (en) * | 1930-06-06 | 1934-02-01 | Siemens Schuckertwerke Akt Ges | Device for strain relief of electrical cables |
DE689774C (en) * | 1938-03-03 | 1940-04-02 | Siemens Schuckertwerke Akt Ges | Attachment of a sliding part of the lamp on the vertical lamp tube |
DE6753174U (en) * | 1968-09-26 | 1969-04-10 | Siemens Ag | MAST-LAMP |
DE1750701A1 (en) * | 1968-05-27 | 1971-02-25 | Medizintechnik Leipzig Veb | Clamping device for attaching support arms, flanges, trusses or the like to rods |
-
1984
- 1984-05-10 PL PL24762184A patent/PL143200B1/en unknown
-
1985
- 1985-05-08 SU SU853893700A patent/SU1369683A3/en active
- 1985-05-09 DD DD27613285A patent/DD233895A5/en not_active IP Right Cessation
- 1985-05-10 EP EP85105779A patent/EP0163981A3/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE592121C (en) * | 1930-06-06 | 1934-02-01 | Siemens Schuckertwerke Akt Ges | Device for strain relief of electrical cables |
DE689774C (en) * | 1938-03-03 | 1940-04-02 | Siemens Schuckertwerke Akt Ges | Attachment of a sliding part of the lamp on the vertical lamp tube |
DE1750701A1 (en) * | 1968-05-27 | 1971-02-25 | Medizintechnik Leipzig Veb | Clamping device for attaching support arms, flanges, trusses or the like to rods |
DE6753174U (en) * | 1968-09-26 | 1969-04-10 | Siemens Ag | MAST-LAMP |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000002219A2 (en) * | 1998-07-04 | 2000-01-13 | Werma Signaltechnik Gmbh & Co. | Signal transmitter |
WO2000002219A3 (en) * | 1998-07-04 | 2001-07-05 | Werma Signaltechnik Gmbh & Co | Signal transmitter |
US6561719B1 (en) | 1998-07-04 | 2003-05-13 | Werma Signaltechnik Gmbh & Co. | Signal transmitter |
Also Published As
Publication number | Publication date |
---|---|
SU1369683A3 (en) | 1988-01-23 |
PL247621A1 (en) | 1985-11-19 |
PL143200B1 (en) | 1988-01-30 |
DD233895A5 (en) | 1986-03-12 |
EP0163981A3 (en) | 1988-11-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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): DE FR GB IT SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB IT SE |
|
17P | Request for examination filed |
Effective date: 19890110 |
|
17Q | First examination report despatched |
Effective date: 19890531 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19891011 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KARUT, EMIL |