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Publication numberUS1027848 A
Publication typeGrant
Publication dateMay 28, 1912
Filing dateMar 25, 1912
Publication numberUS 1027848 A, US 1027848A, US-A-1027848, US1027848 A, US1027848A
InventorsPeter Huston
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1027848 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



1,027,848. r I Patented May 28, 1912.

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Specification of Letters Patent.

Patented May 28,1912.

To all whom it may concern.

Be it known that I, PETER HUSTON, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Shade-Holders, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to that type of shade holders more particularly adapted for use in connection with incandescent electric lamps in which the neck of the shade is clamped by an annular helical spring housed within a casing comprising a fixed member and a flanged nut running upon the fixed member, one of the parts of the housing having an inclined face for contracting the spring upon the shade.

The object of the invention is to adapt a holder of this character to yieldingly grip the shade, when the nut is retracted to the full limit of its movement, holding it with suflicient firmness to prevent it from falling by its own weight yet permitting its withdrawal upon the application of force. This object is attained by the construction hereinafter described and illustrated in the accompanying drawings, in which Figure 1 is a sectional view of the holder on the plane of its axis, the shade being shown in detail and as being securely clamped within the holder. Fig. 2 is a similar view with the nut of the holder retracted to the limit of its movement. Fig. 3 is a sectional detail in perspective of the fixed element of the holder on the same plane. Fig. 4 is a similar view of the nut. Fig. 5 is a detail of the locking ring for preventing the separation of the nut from the fixed element of the holder, and Fig. 6 is a sectional view on the line 66 of Fig. 1.

The fixed element- 10 of the holder is shown as having the form of a cap centrally apertured for attachment to a supporting bracket, notshown. The form of this element is not essential except that it is provided with an annulus 11 rabbeted, as shown at 12 to provide a seat for the end of the neck of the shade 13 and having an outstanding flattened face 14 below the rabbet. Exteriorly the ring 11 is rabbeted at its upper edge, as shown at 15 and is threaded below the rabbet.

The nut 16 is threaded to engage the thread of the ring 11 and is flanged inwardly at its lower end, as shown at 17, this flange having an inclined inner face 18. The inner end of the nut is prolonged beyond the threaded portion and is recessed in its inner face to receive the open locking ring 19 which may be sprung into the recess and which is formed of wire of such size that it will project when seated within the recess beyond the threaded face of the nut thereby engaging the shoulder of the rabbet 15 when the nut is turned back or retracted. The locking spring is readily inserted when the nut is turned up to the limit of its movement.

An annular helical spring 20 is seated between the shoulder 14 and inclined face 18 and is normally of such diameter that when the nut is retracted it rests upon the upper edge of the inclined face. hen in this POSI- tion the internal diameter of the annular spring is normally less than the external diameter of the shade flange 21, thus preventing the insertion or removal of the shade without the application of sufficient force to compress the convolutions of the spring.

As shade holders of this type have heretofore been made the inclined face has been located upon the fixed element, the flange of the nut being a flat shoulder. By reversing the position of these faces, as shown and described, the weight of the shade tends to contract the annular spring by forcing it down upon the inclined seat while in the form of the construction heretofore followed, the weight of the shade tended to move the spring to the outer edge of the incline and thereby expand it, permitting the shade to drop of its own weight. It was therefore necessary for the operator to use both hands in the operation of either inserting or removing the shade and much trouble arose from the breakage of shades due to careless handling. 7

By the construction here shown and described, the shade may be inserted or removed without using two hands in the operation and in consequence the danger of dropping the shade by careless handling is eliminated.

I claim as my invention- 1. In a shade holder, in combination, an externally threaded ring having a flat face, a nut engaging the ring and having an instanding flange, the inner face of the flange being inclined, and a helical annular spring seated between the face of the ring and the seated between the face of the ring and the flange of the nut. flange of the nut and means for limiting 2. In a shade holder, in combination, an the retractive movement of the nut. externally threaded ring having a flat face, PETER HUSTON. 5 a nut engaging the ring and having an instanding flange, the inner face of the flange being inclined, a helical annular spring Witnesses:


Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2575310 *Apr 12, 1946Nov 13, 1951Joslyn Mfg And Supply CompanySpring biased sealing device for supporting a luminaire bowl on the reflector
US2866084 *Feb 18, 1957Dec 23, 1958Crouse Hinds CoLighting unit
US5402326 *Nov 12, 1993Mar 28, 1995High End Systems, Inc.Gobo holder for a lighting system
US5537303 *Aug 3, 1994Jul 16, 1996Vari-Lite, Inc.Programmable rotatable gobo system
US5691886 *May 9, 1996Nov 25, 1997Vari-Lite, Inc.Programmable rotatable gobo system
U.S. Classification362/440
International ClassificationF21V17/12
Cooperative ClassificationF21V17/12
European ClassificationF21V17/12