New! View global litigation for patent families

US3559146A - Current supply rail arrangement and a connection plug - Google Patents

Current supply rail arrangement and a connection plug Download PDF

Info

Publication number
US3559146A
US3559146A US3559146DA US3559146A US 3559146 A US3559146 A US 3559146A US 3559146D A US3559146D A US 3559146DA US 3559146 A US3559146 A US 3559146A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
rail
plug
supply
contact
metal
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.)
Expired - Lifetime
Application number
Inventor
Rainer Valtonen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Oy AB
Original Assignee
Nokia Oy AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R25/00Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/14Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length, e.g. track lighting systems

Abstract

A PLUG IS PROVIDED WITH A PLURALITY OF CONTACT FINGERS. THE FINGERS ARE RESILIENTLY SUPPORTED SO AS TO BE MOVABLE FROM A RETRACTED POSITION INSIDE THE PLUG BODY TO AN EXTENDED POSITION TO ENGAGE THE CONDUCTORS AND THE GROUNDED LEAD OF THE PLUG. ECCENTRICS ARE SUPPORTED IN THE PLUG BODY AND ARE ENGAGEABLE WITH THE FINGERS TO SELECTIVELY DISPLACE SAME. A KNOB IS PROVIDED EXTERNALLY OF THE PLUG AND IS COUPLED WITH EACH OF THE ECCENTRICS TO SIMULTANEOUSLY DISPLACE ALL OF THE ECCENTRICS.

Description

Jam 26, 1971 R. vggLToNEN 3,559,145

l v GIURRENT SUPPLY RAIL ARRANGENENT AND A CONNECTION PLUG Filedot. 25. 196s United States Patent Oice Patented Jan. 26, 11971 3,559,146 CURRENT SUPPLY RAIL ARRANGEMENT AND A CONNECTION PLUG Rainer Valtonen, Tapiola, Finland, assignor to i Oy Nokia AB, Helsinki, Finland Filed OctrZS, 1968, Ser. No. 770,658

Int. Cl. H01r 3/ 06 U.S. Cl. 339--14 2 Claims ABSTRACT OF THE DISCLOSURE A plug is provided with a plurality of contact fingers. The fingers are resiliently supported so as to be movable from a retracted position inside the plug body to an extended position to engage the conductors and the grounded lead of the plug. Eccentrics are supported in the plug body and are engageable with the fingers to selectively displace same. A knob is provided externally of the plug and is coupled with each of the eccentrics to simultaneously displace all of the eccentrics.

'The present invention relates to an electric current supply rail arrangement and connection plug for use therewith, particularly intended for lighting purposes and for small electrical motors, the rail being of the kind comprising a metal rail serving as a grounding lead and supporting structure and one or `more electric conductors fixed in the metal rail and insulated therefrom by one or more fastening strips of plastics material.

Such a current supply rail arrangement is suitable for display windows, exhibition rooms, laboratories etc. for conducting electric current to electrical apparatus and arrangements of small current requirements and which are attached to the wall or ceiling. The current is conducted from the supply rail by means of suitably adapted connecting plugs, which are attachable to the supply rail at any desired point along the rail.

Various supply rail constructions of this kind are known. In order to achieve a handy attachment of the current supply rail to a support it appeared heretofore to be of advantage to arrange the conductors within a hollow metal rail that serves as a supporting strucure. Such a rail must be of a very accurate shape allowing the attachment of the connecting plugs to be` made with great accuracy. In order that the connecting plugs at eachpoint make proper contact with the conductors, the plugs should be uniformly spaced from each other. In known constructions the shape of the insulating and fastening strips of plastics fitted into the metal rail has determined the distance of the conductors from each other. Because the manufacturer of plastics strips of accurate dimensions involves great difficulties it has been troublesome to ensure that the conductors be uniformly spaced from each other. p

The object of the invention is to attain a supply rail arrangement using a supporting construction of metal, which obviates the manufacturing difficulties in providing conductors which extend with sufficient accuracy at a constant distance from each other.

This object of the invention is achieved by a current supply rail of the aforesaid kind and which is characterized by the feature that the conductors are fitted in those edge portions of the plastics strip which rest against the metal rail and that the section of the strip between said edge portions is curved and resilient so as to force said edge portion to rest against the metal rail.

The advantage of the invention is that the accuracy of the mutual positions of the conductors is determined apart from the accuracy of the metal rail, and only by the exactness of the thickness of the plastics strip. In the manufacture of plastics strip it is easier to avoid variations in thickness than the variations in shape and width. By arranging the conductors in said edge portions, which rest against the metal rail when the plastic strip is mounted inside the rail, it is'possible to eliminate the influence of the variations in shape and width of the plastic strip on the mutual position of the conductors within the rail. The plastic strip can be made comparatively thin. The actual values of the variations in thickness of a thin plastic strip are insignificant. When a plastic strip fabricated according to the invention is mounted into a metal rail manufactured with sufficient exactness the object is achieved that the conductors extend with a satisfying accuracy at a constant distance from each other,

Some embodiments of the invention will tbe described with reference to the accompanying drawings, wherein:

FIG. 1 shows in section a single phase supply rail arrangement according to the invention;

FIG. 2 shows in section a three-phase supply rail arrangement;

FIGS. 3 and 4 show respectively an end-view and a Side-view of a three-phase supply rail arrangement with a connecting plug; and

FIG. 5 shows a connecting plug for a three-phase supply rail arrangement in a section taken along line A-A in FIG. 4.

FIG. 1 shows a metal rail 1 which can be made, for example, as an extruded aluminum rail, serving as a supporting element and as a protective grounding lead, together with an insulating and fastening strip 2, which can be constituted, for example, of PVC-plastics, supporting conductors 4 and 5 which can be copper wires having a circular or a fiat cross section. The curved part 10 of the plastic strip 2.is of such a length that the strip after having been mounted into position in the rail 1 is slightly stressed. The position of the conductor 4 fixed by the plastic strip 2 relative the metal rail 1 is determined by the thickness of the parts 6 and 7 of the plastic strip. Similarly, the position of the conductor 5 relative the metal rail 1 is determined by the thickness of parts 8 and 9 of the plastic strip.

FIG. 2 shows a supply rail arrangement for a three phase system. This includes in addition to -the plastic strip 2 another similar plastic strip 2' supporting conductors 11 and 12. In this case the conductors 4, 11 and 12 are coupled in a suitable way to the wires of a three-phase circuit.

In FIGS. 3 and 4 is shown a connecting plug 13 attached to a supply rail. The connecting plug 13 is provided with contact fingers 14, 15, 16 and 17 for contacting the conductors 4, S, 11 and 12. The connecting plug is further provided with contact fingers 18 and 19 for contacting the metal rail 1in order to provide a protective grounding.

FIG. 5 shows the interior of the connecting plug 1 3 seen in section along line A-A in FIG. 4. The contact finger 15, whcih is made of a comparatively hard spring materila, e.g. bronze, is attached to the body of the connecting plug by a screw 21. By the action of an eccentric 20 journalled in the body of the plug the contact finger 15 is movable relative the body of the plug between a retracted position and a projecting position. The contact linger 15 is attached by means of a screw 21 to a wire of a conductor 22, which leads to a current consuming apparatus. The other contact fingers 14, 16, 17, 118v and 19, also of spring material, are in a corresponding manner attached to the body of the connecting plug and similarly connected to corresponding wires of the conductor 22. When the connecting plug 13 is to be attached to the current supply rail, the eccentric 20 and simultaneously the other eccentrics (not shown) acting on the other contact fingers are turned by means of a knob 23 (FIGS. 3 and 4) to such a position that the contact fingers are retracted allowing the connecting plug to be easily attached to the supply rail. The various eccentrics are of such shapes that, when the connecting plug is attached to the supply rail and the knob 23 is turned to move the contact fingers 14-19 to their contacting positions, the grounding contact fingers 18 and 19 are first brought in contact with the metal rail 1 before the other contact fingers 14-17 are brought in contact with their respective conductors 4, 5, 11 and 12, in order to achieve the protective grounding of the consumer apparatus before said apparatus is connected to the circuit.

The drawings and the descriptions thereto are only intended to exemplify the idea of the invention. As to details the connecting plug and the current supply rail arrangement can, within the scope of the claims, deviate to a certain extent from the embodiments depicted.

What I claim is:

1. A connection plug for a current supply rail assembly including a metal rail, and at least one current conductor supported by said metal rail, said current supply rail constituting a grounding lead, said plug comprising a hollow body, a plurality of contact fingers resiliently supported in said hollow body, said fingers being engageable at least one with one of each of the conductors and at least another with the grounded metal rail, eccentric means engageable one with one of each of said fingers to displace said fingers respectively from a retracted position internally of said hollow body to an extended position projecting externally of said hollow body to contact respectively the conductors and the grounded metal rail, and single control means operatively associated with each of said eccentric means to simutaneously displace each of said eccentric means.

2. A connection plug as claimed in claim 1 wherein said contact fingers are each operatively associated, one with one of each of said eccentric means, such that said control means is operable to displace said eccentric means simultaneously, with the contact finger, being engageable with said grounded metal rail, contacting said metal rail before the contact finger, being engageable with the conductor, contacts the conductor.

References Cited UNITED STATES PATENTS 3,503,032 3/1970 Routh et al. 339-14 3,181,102 4/1965 Fehr 339-21 3,295,093 12/1966 Neumann et al. 339-21 MARVIN A. CHAMPION, Primary Examiner R. A. HAFER, Assistant Examiner U.S. C1. X.R.

ZOO-51.05; 339-21

US3559146A 1968-10-25 1968-10-25 Current supply rail arrangement and a connection plug Expired - Lifetime US3559146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US77065868 true 1968-10-25 1968-10-25

Publications (1)

Publication Number Publication Date
US3559146A true US3559146A (en) 1971-01-26

Family

ID=25089282

Family Applications (1)

Application Number Title Priority Date Filing Date
US3559146A Expired - Lifetime US3559146A (en) 1968-10-25 1968-10-25 Current supply rail arrangement and a connection plug

Country Status (1)

Country Link
US (1) US3559146A (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676830A (en) * 1970-09-16 1972-07-11 Lightolier Inc Multiple access electric power distribution assembly
US3686614A (en) * 1970-02-03 1972-08-22 Nokia Oy Ab Connecting plug for a current supply rail
US3704437A (en) * 1970-01-07 1972-11-28 Staff & Schwarz Gmbh Current distributor rail
US3718816A (en) * 1970-06-18 1973-02-27 Reininghaus & Co Illumination device
US3725695A (en) * 1970-10-28 1973-04-03 Reininghaus & Co Illumination device
US3737834A (en) * 1971-09-20 1973-06-05 Us Industries Inc Adapter for three conductor electrical power distribution track
US3825879A (en) * 1971-08-03 1974-07-23 K Hesse Adapter for current distributor rail
US3919457A (en) * 1974-04-22 1975-11-11 Sheldon Steiner Electrified suspension ceiling system
US4121879A (en) * 1977-05-18 1978-10-24 Bjorn Kokvik Connector arrangement for conductor rails
US4173382A (en) * 1977-01-27 1979-11-06 Booty Donald J Portable track lighting
US4734041A (en) * 1987-06-22 1988-03-29 Control Data Corporation Electrical power connector
US4822292A (en) * 1985-01-02 1989-04-18 Thayer George F Multiple line circuit track lighting system and fixture mounting adapters therefore
US5855485A (en) * 1997-01-16 1999-01-05 Patti; Anthony G. Multiple track adapter for track lighting systems
US7397384B1 (en) 2005-02-11 2008-07-08 Genlyte Thomas Group, Llc Track lighting system current limiting device
US7507005B1 (en) 2007-01-30 2009-03-24 Genlyte Thomas Group Llc Sliding flexible track lighting
US7520763B1 (en) 2007-06-29 2009-04-21 Genlyte Thomas Group Llc Track lighting system with dependent lamp cord
US20100126104A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Electrified ceiling grid
US20100130055A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Electrified suspended ceiling grid
US20100126090A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Specialty ceiling structure and functional ceiling grid
US20100126105A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Multi-circuit electrified ceiling grid
US7758358B1 (en) 2008-05-05 2010-07-20 Koninklijke Philips Electronics N.V. Track lighting assembly
US8899999B2 (en) 2012-09-24 2014-12-02 Abl Ip Holding Llc Track adapter and lighting fixture

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704437A (en) * 1970-01-07 1972-11-28 Staff & Schwarz Gmbh Current distributor rail
US3686614A (en) * 1970-02-03 1972-08-22 Nokia Oy Ab Connecting plug for a current supply rail
US3718816A (en) * 1970-06-18 1973-02-27 Reininghaus & Co Illumination device
US3676830A (en) * 1970-09-16 1972-07-11 Lightolier Inc Multiple access electric power distribution assembly
US3725695A (en) * 1970-10-28 1973-04-03 Reininghaus & Co Illumination device
US3825879A (en) * 1971-08-03 1974-07-23 K Hesse Adapter for current distributor rail
US3737834A (en) * 1971-09-20 1973-06-05 Us Industries Inc Adapter for three conductor electrical power distribution track
US3919457A (en) * 1974-04-22 1975-11-11 Sheldon Steiner Electrified suspension ceiling system
US4173382A (en) * 1977-01-27 1979-11-06 Booty Donald J Portable track lighting
US4121879A (en) * 1977-05-18 1978-10-24 Bjorn Kokvik Connector arrangement for conductor rails
US4822292A (en) * 1985-01-02 1989-04-18 Thayer George F Multiple line circuit track lighting system and fixture mounting adapters therefore
US4734041A (en) * 1987-06-22 1988-03-29 Control Data Corporation Electrical power connector
US5855485A (en) * 1997-01-16 1999-01-05 Patti; Anthony G. Multiple track adapter for track lighting systems
US7911351B2 (en) 2005-02-11 2011-03-22 Genlyte Thomas Group Llc Track lighting system current limiting device
US7397384B1 (en) 2005-02-11 2008-07-08 Genlyte Thomas Group, Llc Track lighting system current limiting device
US8144025B2 (en) 2005-02-11 2012-03-27 Genlyte Thomas Group Llc Track lighting system current limiting device
US20110133671A1 (en) * 2005-02-11 2011-06-09 Genlyte Thomas Group Llc Track lighting system current limiting device
US20080252234A1 (en) * 2005-02-11 2008-10-16 Genlyte Thomas Group, Llc Track lighting system current limiting device
US7507005B1 (en) 2007-01-30 2009-03-24 Genlyte Thomas Group Llc Sliding flexible track lighting
US7520763B1 (en) 2007-06-29 2009-04-21 Genlyte Thomas Group Llc Track lighting system with dependent lamp cord
US7758358B1 (en) 2008-05-05 2010-07-20 Koninklijke Philips Electronics N.V. Track lighting assembly
US20100126090A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Specialty ceiling structure and functional ceiling grid
US20100126105A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Multi-circuit electrified ceiling grid
US20100126104A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Electrified ceiling grid
US20100130055A1 (en) * 2008-11-26 2010-05-27 Usg Interiors, Inc. Electrified suspended ceiling grid
US8146316B2 (en) 2008-11-26 2012-04-03 Usg Interiors, Llc Electrified ceiling grid
US8314336B2 (en) 2008-11-26 2012-11-20 Usg Interiors, Llc Specialty ceiling structure and functional ceiling grid
US8485835B2 (en) 2008-11-26 2013-07-16 Usg Interiors, Llc Electrified suspended ceiling grid
US8899999B2 (en) 2012-09-24 2014-12-02 Abl Ip Holding Llc Track adapter and lighting fixture

Similar Documents

Publication Publication Date Title
US3497850A (en) Multidirection safety snap-in fused adapter plug
US3133779A (en) Neutral wire connector
US3437976A (en) Swiveling connector for electric cord
US3587029A (en) Rf connector
US3295093A (en) Electric power distribution conduit accessible for connection thereto along substantially its entire length
US2626301A (en) Bus duct system of power distribution
US4881907A (en) Conductor strip for electrical and telecommunication conductors
US2140376A (en) Electric panel board
US4026618A (en) Low profile electrical male plug
US3648142A (en) Infinite speed control switching device for use with electric motors in portable tools
US3956576A (en) Insulator for battery connections
US2344935A (en) Lighting installation
US3930708A (en) Flat cable wire-connector
US3323099A (en) Electrical apparatus
US4449296A (en) Method of forming electric distribution panel
US4245873A (en) Adjustably positionable electrical outlet
US3808582A (en) Pre-loaded electrical connecting device
US3137537A (en) Separable connector for flat multipleconductor cables
US2920303A (en) Electrical terminal box construction with detachable face plate and wire tapping means therefor
US2825799A (en) Vehicle lamp
US1818884A (en) Portable electric lighting outfit
US3936131A (en) Snap-in assembly and contact terminal for wedge base lamps
US4108523A (en) Electrified channel, equipped with a snap-acting connector
US3263131A (en) Electric power busway with plug-in branch circuit takeoff
US2994849A (en) Electrical plug-in connector