Illumination – Supports – Standard-type support
Patent
1983-12-21
1985-06-25
Lechert, Jr., Stephen J.
Illumination
Supports
Standard-type support
362226, 362287, 362414, 362427, 362431, 362449, 362450, 339 8A, 339 8P, F21S 112
Patent
active
045257736
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL AREA
The invention concerns a light fixture with a carrier for the lamp fixture, a tube which surrounds at least one current conductor and mounting part for the tube.
STATE OF THE ART
Known light fixtures of this type are common standing lamps in which a cable runs through the foot part and the tube is led to the lamp fixture carrier and to lamp fixture. The electric cable is firmly wired in.
In so-called work area fixtures, consisting of several tubes and joints, the wiring is either through the tubes and joints or along the tubes. When the wiring is led through the inside, there are technical and esthetical problems on the joints. The wires led on the outside greatly interfere with the esthetic possibilities.
For this reason there have already been suggestions for work place light fixtures in which the carrier rods form also the current conductors. The carrier rods are electrically insulated from each other. The use of open current conductors is only possible in the low voltage range. However, even in the low voltage range there is the problem that short circuits could occur between the open current conductors.
THE INVENTION
The invention is based on the problem to make light fixtures of the type mentioned in the beginning in such a manner that they can be assembled without further wiring from the various parts in a detachable and variable manner.
This problem is solved by the fact that the tube can be pushed together with the carrier part and the lamp fixture carrier, whereby the tube and the receptacle areas for the tube ends in a pushed together position have connected, central contact pins - firmly attached to the parts - or contact sockets which have contact surfaces that are arranged in a concentric manner to each other and to the center axis of the tube, whereby the pushed together parts are pivotable against the tube and the center axis of the corresponding tube end.
According to another characteristic of the invention the tube can be locked to the attached parts.
Further more, it is suggested that several tubes are mechanically and electrically combinable through tube joining sleeves and contact pins or sockets mounted in them.
It has proven suitable that the inside tube end has all around a groove, perpendicular to the tube axis, into which a spring mounted in the corresponding piece fits.
For this purpose, the spring preferably sits in the inside groove of a counter piece on the attached part, fitting over the tube end, whereby the inside diameter of the counter piece corresponds at least approximately to the outside diameter of the tube end.
Such a light fixture can be combined in random shapes and combinations. The connections between the various parts of the fixture can be done extremely simply, even by the user, and without tools. By choosing certain tube and connecting pieces, he can create various light fixtures. There are essentially no limits to the variation possibilities. By mounting the electric lines inside the tubes, esthetically pleasing fixtures can be created. When using suitable metal tubes, the tubes themselves can be used as current of grounding leads. The arrangement of the electrical connector elements in the front sides of the parts to be joined permits an esthetically very pleasing construction of the connecting parts, as the plug elements can be made very small. It is possible, e.g., to use tubes with an outside diameter of 6 to 8 mm, whereby it is possible to comply with electrical testing regulations in spite of the small diameter.
According to another suggestion in the invention, the ends of two tubes can be connected by means of a connecting piece which has two parallel channels to accept tube ends, which have electrical contact pins or sockets for connection to the corresponding counter piece in the tube ends.
In this case, the connector piece consists of two plate like half bowls, whereby each has about half of the accepting channels and which can be put together with a connecting screw. Such connecting pieces are especially advantageous if the tu
REFERENCES:
patent: 3585564 (1971-06-01), Skjervoll
patent: 3955079 (1976-05-01), Chapman et al.
patent: 4175809 (1979-11-01), Dusko
Engel Hartmut
Hesse Kurt
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