US1573799A - Light bracket - Google Patents

Description

Feb. 23 1926. 1,573,799

H. J. BOSWORTH LIGHT BRACKET F1ed Dec 29 1924 Patented Feb. Z3, 1926.

Unirse stares PATENT HARRY J". BOSWORTH, 'VOF CHICAGO, ILLENOS, ASSIGNOR TO HARRY J'. BOSWORTH COMPANY, OF CHCAGO, ILLNOIS, A COBPGRATON OF ILLINOIS.

LIGHT BRACKET.

Application tiled December 29, 1924. Serial No. 758,517.

To ,all whom t may concern:

Be it known that I, HARRY J. Boswon'rri, a citizen 'of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented al certain new and us'eiul Improvement in Light Brackets, of which the following is a full, clear, conoise, and exact description, reference being .had to the accompanying drawino's, -forming a part of this specification.

My invention relates to light brackets and its object is the provision ot' a generally improved, simple and inexpensive take-up means for the conductor of the electric lamp (shownand described in my co-pending application, Serial No. 727,166, tiled July 21, 19211).`

In that device the current supplying conductor for the electric lamp extends through the tubular mounting post and moves in and out through the bottom of the post in extending and retracting the lightarm, provision being made usually externally of the post for moving the conductor outof the bottom thereof to take-up the slack in retracting the arm, and such provision at the same time permitting movement of the conductor up into the post in extending the arm. The means of my present .invention is adapted for embodiment withinthe bracket itself, preferably within the extensible and retractable light arm thereof, and it prog vides for taking up the slack of the conductor without movement of same into and out of the bottomV of the mounting post and without the usual external provisions heretofore made for that purpose. It `also makes possible an improvement in the means for limiting the extension ot the light arm and vcti-operates with said means to the cud ot a simple and inexpensive combination havretractable light arm;

Fig. 3 is a transverse section on line SNS o t Fig?,

Fig. 4 is a transverse section on line 1- 4 o1 Fig. 2;

Fig. 5 is a transverse section on line 5--5 of Fig. 2.

Referring to the drawings, the supporting bracket of the fixture `is designated at 10 and comprises a tubular post 12,/in which the tubular post let is rotatably mounted, said post 12 having on each side a pair of integral feet or apertured lugs 12 for attachment to the wall or other support. As more fully disclosed in my aforesaid copending application, the post 1li has clamped thereon, at its upper end, a pair oit' head members 15, and a head 1G, at the adjacent end of the light arm 17, is mounted between said head members 15 upon a pin or post 18 for swinging movement in a vertical plane thereabout. i

The light or lamp carrying arm 17 comprises a pair of telescoping tubes 2O and 21` the tube 21 being suitably secured in the tubular projection 23 of the mounting head 1.6. Fixedly mounted upon the outer end ot tube 20, is a light supporting litting 24 having a downwardly opening mouth in which, and between the sides ot the fitting. 1s pivoted at 25, a pendant light support 2G. The particular light shown comprises a lower translucent bowl or open topped globe 27' and an upper shade 28. i

The light and light arm may be counterbalanced in any suitable manner, preterably in the manner disclosed in my hereinbefore referred to co-pending application. by means housed in the tubular post 11 and associated hea-d member 12. In usc, tbc arm 17 has pivotal or swinging movei'nent in a vertical plane about pivot 1S and the light may be swung into any position about said pivot. The light may be swung in a horizontal plane by turning or rotation ol? post 14 in the mounting bracket 10 and tbe 'distance of the light from the support is increased or decrease-t, and its path ol swinging movement about pivot 18 in a vertical plan-e and about post 14 in a horizontal plane, may beadjusted by extension or retraction oi' the telescoping arms 2O and 21. Although suitable means may be provided for locking the tube 20 in any desired eX- tended or retracted position, this tube is, as before, preferably held by friction and the counter-balancing action so that a nut or other means need not be loosen-ed or adjusted each time.

The conductors 30, which supply current to the lamp 82, are preferably ot the ilexible type and they are led into the loiver open end ot supporting tube le, up', out., around the pivot 18 in the head members at the upper end ot said post, out through tubular arms 2O and 21 and down through the pendant supportQG to the lamp 32, with which they have suitable electrical connection,` Ls for example, by means of al standard Edisonf or any other preferred type ot socket or connecting member. On the outer end of armQl isa terrule 85.

' anchored fixedly in the postvend ot arm 2l, as by means ot' a radial pin 38, is a disc or bloclr 10 which serves the dual function of a stop or abutment for one' end of the coiled or spring take-up portion ot the conductors and carries an axial rod 4t2 tor limitingl the extension ot the arm 2 It is to be understood 'that a complete disc is not necessary,

Y but the particular form ot stop or abutment and rod carrying member may be varied.

Anchored ixedly in the inner end of the Xtensible arm 20as by meansY ot a radial pin :2-, is a second disc or block et which serves the dual function of stop or abutment for the opposite end ot the coiled taketi n of the conductor, and a guide for The rod or stein e2 is tif;-

in the block 4:0 and pro- 7och lf-i therealong in the n of the arm 20. The es has a head 46 which, n the block t-t, limits the further function of a stop arm of the ixture. .Each

'from its periphery, `as indicated at t ann e8, the conductor 30 being led thro-ugh the notch /l into the space between the blocks and through the notch e8 out to the light 32 at the opposite end ot the tixture. Between the blocks Ll() and 14, the conductor 30 is coiled helically at 5t), formino` in etiket a spring and thereby a spelt .-up provision in itself. Conductor Wires haring suflicient springiness to impart any desired springaction at this point, may

be emiiloved or additional sirinO Qrovision Y may even Vbe made along thislengthof the wire. Y I iind that the ordinary flexible conductors usually employed have considerable springinessfor the'selt take-up purpose in tended. The conductors illustrated comprise, as shown inligures 3 and 5, a pair ot wires or conductors insulated trom each other and enclosed in a common covering,

standard practise heilig to provide a fabric or silk Wound covering for such conductors. It is tobe understood, however, that the particular type or conductor or conductors employed may be varied as desired. The conductors may be separately Wound and stranded together and, as already pointed out, the usel of special spring conductors and the provision oi additional spring strips or other means along the coiled portions of the conductors is contemplated.

ln use, as the distance from the light' 32 to the mounting` post is increased upon ex tending the arm 20, the additional length of: conductor reqired is drawn from the coiled portion 50 ot the conductor Without the necessity of moving the conductor into and out o't' the bottom of the post 14. As the extensible light arm ot the .fixture is retracted, the slack `in conductor 30 is automatically taken up by the coiled portion x50` thereoic and the outer land inner ends of the conductor on each side of the coiled portion 570, are i maintained substantially taut at all times and gathering, binding, collecting and interret'erence With proper movement of the parts oi. the lixture by the conductor is prevented.

The provisions which I have made are adapted for embodiment in the eXtensible arm itself, so 'as to in no Way interfereivith the counterbalancing means in the tubular mounting post of the ixture and by eliminatingmovement of the conductors into and ji out of the bottom of the post 14: and external talreuip provisions, a more compact fixture and pleasing appearance is secured.

While l have described my invention in connection with the details of a particular 1:

embodiment, it is to be understood that modifications and changes and other uses than that described are contemplated Within the scope of my presentinvention.

l claim:

l. In a lightingtixture, a support, an arm mounted on said support, rsaid arm comprising a pair of telescoping tubes, a block member mounted in one tube, a block member mounted in the other tube, a light on said arm, and a conductor for said light, said conductor extending through said tubes `and coiled helically between said block .members and means mounted upon one ot said block members and cooperable with the oth er block member tor limiting the extension ot said tubes.

2. ln a lighting tixture, a support, an arm iounted on'said Support, Said arm comprising a pair ot telescoping tubes, ka block member mounted in one tube, a block member mounted in the other tube, a light on said arm, a conductor tor said light, said concluetcr extending through said tubes and coiled helically between said block members, and a stein secured to one oi' said block meinbers and extending longitudinally through l@ Sl-dingly through the other, a head on said Stem co-operable with Suid other block member for limiting the extension of the tubes. u light on said arm and u conductor for said light, said conductor having" take-up means teusioned in said arm and between said first and second block members.

u Witness whereof, I hereunto subscribe my name this 22 day of December, 1924.

HARRY J. BOSWORTH.

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