US1530993A

US1530993A - Lighting fixture

Info

Publication number: US1530993A
Application number: US465772A
Authority: US
Inventors: Henry A Framburg
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-04-30
Filing date: 1921-04-30
Publication date: 1925-03-24
Anticipated expiration: 1942-03-24

Description

March 24. 1925.

H. A. FRAMBURG LIGHTING FIXTURE bury i ngejgor. Henry va Original Filed April 30, 1921 Patented litten del? laila narran STATES naaste PATENT OFFICE.

HENRY A. FRAMB''RG, OF BERWYN, ILLINOIS.

LIGHTING FIXTURE.

Application filed April 30, 192.1, Serial 1\Tc-.` 465,779.y Renewed December, y1922.

To all whom t may conocer/'1.,'

Be it known that l, HENRY A. FruiMBnc-,-

a citizen of the United States, and resident of Berwyn, county of Cook and State of illinois, have invented certain new and useful Improvements in Lighting Fixtures, of which the following is a specification7 and Which are illustrated in the accompany ing' drawings, forming` a part thereof.

'Theinvention relates to .lighting fixtures and especially to chandeliers and Wall lixtures having` spaced bracket arms -which `project vertically `and outwardly troni a common support. rlhe object of the invention is to provide alightinp; iirzture of such improved construction as to facilitate t-he assembling oi" the parts and effectively prevent relative angular displacement 'of the bracket arms in service.

ln the accompanying di'aivingsy-V Fig. 1 is a central vertical. sectional vienT ot` a chandelier embodying the features ofM improvement provide-d by the invention,

some parts being shown in elevation;

Fig. 2 -is an inverted detail plan sectional view taken on the line 2-2 of llig. 1; Fig. is a plan vievv showing a centering plate employed in the construction ot the chandelier7 separated troni other parts;

l is similar to like: 3, butl shows a torni of centering' plate which may be used in the construction oit a Wall fixture;

Fig. 5 is a detail sectional vievv taken on the line 5 5 ot Fig. 2;

Fig. 6 is a plan view of the chandelier illustrated in Fig. 1, and f Fig. 7 -is similar to Fig. 6, but shows the application of the invention to the'con struction ont Fixture. 1

The body of the improved chandelier may be constructed in accordance with the usual practice to produce the desired external appearance As shovvnyiirllig. 1, the chandelier body is composed of a plurality ot' 4-5 ornanientalsheet metal siells including the two mating'intermediate shells 15, 16, and all of these shells are arranged upon central supporting traine comprising,- asection of pipe 10, a rod 11. and a couplingA member 12, the last mentioned member having,` oppo sitely facing threaded sockets into which the threaded ends of the pipe 10" and rod 11 are entered. rllhe said coupling 1neinber12 is preferably of `a familiar' torni commonly used inthe construction of electric chandeliers and has lateral openings 13 vfor the delivery of the Wiring, as 1.4L, into the chamber of the chandelier body. i

In `the particular design ol' chandelier body selected'itor illustration, the shell 15 is formed to'provide an upwardly :facing fiat annular ledge 17, and the bracket arms, as 18, to which thel lamps (not shovvn)` are applied, spring from thisl ledge.` For this purpose theledge 17 is provided at intervals `with apertures, as 19, through which the `threaded inner ends 2O ofthe bracket arms 18 are "entered, andl each bracket arm 1S is formed With an annular shoulder 21 adjacent its 'threaded'end for bearing upon the said'ledge` about the correspondingap-y. erture. l

While the application oit a clamping' nut, as `22, to the threaded inner lend 19 of each bracket'arni 18' directly under ythe ledge 17, would serve, in a: measure, to hold the bracket arms in place, the improvement pro vided by the invention not only insures the original location of the `bracket arms incorrect angular position but also effectively prevents their subsequent displacenient? and `produces a anore rigid construction.- As shown, the threaded inner end 20 of each bracket arm is formed `with a longitudinal slot 23, at one side,` and a stili' lsheet metal plate 24 having apertures 25 Yfor receiving` the inner'endsof thebracket arms and a tongue 26 at the margin of each aperture 'for entering' the corresponding slot 23, rdirectly under-lies the ledge 17 Within the chamber of the chandelier body'. lt follows that it the` plate ,24 is firmly heldl against the undersideof the ledge 17 with its apertures 25 in register with theapertures 19 of the ledge, the inner ends 2O of:

the bracketarms 18-can only be entered in the apertures 19 Whenthe arms are correct-ly positioned for the engagement of the tongues V26 vvith the corresponding slots 23. Y Likewise,ivlien clamping` nuts, as 22, are applied to the Ythreaded ends of the bracket. arms 18 below the plate 24, the parts will be lirinly held in* place and angular dis placement of the bracket arms is impossible.l Since the usual tapered form ot'pipe threadwill customarily be formed upon the inner ends 2() of the bracket arms 18, vthe application of the `clamping nuts 22vvill tend to compress the walls of each bracket arm at the two sides of the slot 23, thereby firmly gripping the tongue 26 and imparting increased rigidity to the construction.

When the chandelier is formed with the said central supporting frame, the plate 24 is preferably gripped at its center, as' between the adjacent end of the coupling member 12 and a nut 27 applied to the pipe 10 over the plate. Under these circumstances the assembling of the parts vis facilitated and the position of the nut 27 upon the pipe 10 may be relied upon to determine the location of plate 24, if the plate is formed with anangular depression 28 for receiving the nut 2T and preventing its rotation.

In assembling such a device, nuts 27 will first be screwed in place, the end of the threads on tube 1G limiting further movement. Pocket 28, which strengthens the plate against buckling, alsol prevents relative rotation of the plate and tube 10, and these parts are clamped into a rigid unit by coupling 12. As arms 18 penetrate ledge 17 and plate 24, and fastening the arms in place clamps these two parts together, all the upper ornamental` shell structure, is ralso prevented from rotating with respect to tube 10. rlChe top cap 34, therefore screws down into abutment with a fixed and nonrotatable flange andis much less prone to work loose onthat account.

It will be apparent that while the thickness of the ornamental upper shell is insuflicient for it to stand alone, the stresses adjacent the mountings for arms'18, which are carried primarily bythe heavier plate 24, said shell `materially contributes to the rigidity of the entire structure bybracing the edges of the plate to the pipe 10..

There is a decided advantage in the use of a stamping such ats-2% over cast, turned,

or milled parts. This is due, first to cheapness, but also to the much higher degree of uniformityv of product thus obtainable. For the trained eye, the beauty and sym-` metry of such equipment is easily destroyed by errors in alignment. vThese are automatically avoided even 1n quantity production by the structure shown.y Arms 18 are the plate.

' In applying the invention to the con..-

struction of a wall lixture, as 29, (Fig. 7),

a plate 8O (Fig. l) conforming in shape with the body of the fixturel and having apertures 31 equal in number to Ithe number of Vbracket arms 32 of the fixture is used. The plate-30 will also be former with tongues 33 at the margins of the apertures 81 and these tongues will have the same function with respect to the bracket arms 32 as the corresponding parts. of the chandelier already described.

I claim as my invention:

1. In a lighting fixture, in combination, a chambered body having an axially facing. fiat annular supporting. surface apertured at intervals about the same, a plurality of tubular bracket arms each having a threaded and longitudinally slotted inner end entering the chamber of the body through one of the'said apertures, ashoulder formed on each bracket arm bearing on the said flat annular surface of the body about the corresponding aperture, an apertured plate coentensive with the said flatannular surface of the body located within the chamber of the body with its apertures receiving the inwardly projecting ends of the bracket arms, a tongue formed integral with the said apertured plate at the margin of each of its apertures entering the slot of the corresponding bracket arm, and a'clamping nut applied to the threaded end `of each bracket arm withinv the vchan'lber of the body beyond the said plate.

2. In a lighting fixture, in combination, a bracket arm having a threaded inner end formed with a laterally opening socket and a shoulder at the base of the thread, a chambered fixture body having an aperture in its wall to rece-ive the said threaded inner end of the bracket arm, a reenforcing plate lying against the said wall of the fixture body upon the inside of the same, a tongue carried by the last mentioned plate entering the said laterally opening socket of the bracket arm, and a clamping nut. applied to the threaded end of the bracket arm with: in the chamber of the fixture body beyonfg the said plate.

3. In a chandelier, in combination, a pendant central supporting spindle threaded at its lower end, a base plate having a seriesvof apertiues adjacent its rim, clamping nuts applied to the threaded lowen end of the said spindle gripping the base plate between them, means preventing relative rotation of the base plate and the upper one of the two clamping nuts, a chambered shell having a flat apertured marginal portion resting on the marginal portion of the base plate and a bulging intermediate portion covering the intermediate portion of the base plate and the adjacent portion of the spindle, a set of bracket arms having threaded inner ends entering the apertures of the said marginal portions of the shell the said threaded ends of the bracket arms under the base plate.

et. In a chandelier, in combination, a pendant central supporting spindle threaded at its lower end, a base plate having a series ot apertures adjacent its rim, clamping nuts applied to the threaded` lower end of the spindle gripping the base plate be* tween them, means preventing` relative rotation ot the base plate and the upper one of the two nuts, a chambered shell having a fiat apertured marginal portion resting on the marginal portion of the base plate and a bulging intermediate portion c0ver-` ing the intermediate portion ot the base plate and the adjacent portion of the spindle, a set of bracket arms having threaded and longitudinally slotted inner ends, entering the apertures of the said marginal portions ot the shell and base plate, a tongue formed integrali with the base plate at the margin of each ot its apertures entering` the slot of the corresponding bracket arm andclaniping nuts applied to the threaded ends of the bracket arms under the base plate.

In a chandelier, in combination, a pendant central supporting spindle threaded at its lower end, a base plate having a ries ot apertures adjacent its rim, clamping nuts applied to the threaded lower end et the said spindle gripping the base plate between them, a chambered shell having a itat apertured marginal portion resting Jn the marginal portion ot the base plate and bulging intermediate portion covering the intermediate portionA o1 the base plate and the adjacent portion of the spindle, a set ot bracket arms having threaded inner ends entering the apertures of the said marginal portions of' the shell and base plate and ciamping nuts applied to said threaded ends ot' the bracket arms under the base plate.

6. In a lighting fixture, in combination, a support, a bracket arm having a threaded end entering said support, a retaining nut on said end to hold the parts in place, said threaded end being slotted beyond said nut, anda projection on said support. entering said slot to prevent rotation of the arm.

7. In a lighting fixture, in combination, a support, a bracket arm having a pipethreaded end entering said support, a re-` taining nut on said end to hold the parts in place, said threaded end being slotted beyond said nut and resilient, and a projection on` said support entering said slot to prevent rotation of the arm, said projection. being large enough to be gripped by the walls ont said slot when the nut is tightened.

8.111 a lighting `fixture, in combination, a horizontal supporting plate, bracketfarms rising upwardly from said plate and curved outward to support individual lights, an ornamental shell completely overlying said plate and apertured to permit passage of said bracket arms, enlargements on saidarms contacting the upper surface of the shell, and taste-ning means below the plate to clamp all the parts securely together.

9. ln a lighting xture, in combination, a stamped supporting plate having aper tures to receive and support bracket arms, and tubular bracket arms received in said apertures, said apertures having stamped irregularities of contour lying in the plane or the plate, and said arms having registering irregularities to lock the parts against relative rotation.

l0. In a lighting fixture, in con'ibination, a horizontal supporting plate,fbracket arms rising upwardly from said plate and curved outward to support individual lights, an ornamental shell completelyoverlying said plate and apertured to permit passage ot said bracket arms, enlargements on said arms contacting the upper surface of the shell, and fastening means below the plate to clamp all the parts securely together, said arms and plates having registering irregularities oli' contour for preventing turning of the arms with respect `to the plate.

HENRY A.. FRAMBURG. i I