US1703279A - Lighting fixture of the electric-candle type - Google Patents

Description

Feb. 26, 1929. 1,703,279

G. J. MEUER LIGHTING FIXTURE OF THE ELECTRIC CANDLE TYPE Filed May 25, 1927 54 1NVENTOR.

A ITORNEY.

Patented Feb. 2c, 1929.

UNITED STATES 1,703,219 PATENT OFFICE.

GEORGE J. MEUER, OF-MILWAUKEE, WISCONSIN, ASSIGNOB, TO THE CUTLER-HAMMER MFG. 00., OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN. v I

LIGHTING FIXTURE OF THE ELECTBICANDLE TYPE.

Application filed May 25, 1927. Serial No. 194,093.

This invention relates to improvements in lightin fixtures of the electric candle type.

An 0 ject of the invention is to provide an electric candle lighting fixture of simple'and durable construction, the parts of which may be readily and quickl assembled.

Another and more specie object is to provide a lamp socket of'the electric candle type the parts of which are interlocked against relative lateral movement whereby the same may be rigidly secured to each other and to a suitable support by means'of a single fastening screw.

Another object is to provide improved means for supporting the insultating enclosin shell for the socket.

' ther objects and advantages of the invention will hereinafter a pear.

The accompanying rawing illustrates an embodiment of the invention which will now be described, it being understood that the construction illustrated is susceptible of modification without departing from the scolple of the appended claims.

the drawing, Figure l is a vertical sectional view of an electric candle fixture constructed in accordance with my invention.

Fig. 2 is a top plan view of the fixture illustrated in Fig. 1.

Fig. 3 is a view partly in side elevation and partly in vertical section, the section being taken at ri ht anglesto that of Fig. 1, and

- Fig. 4 il ustrates'the various parts ofthe device shown in Figs. 1, 2 and 3j prior to assembly thereof, and with the insulating shell or protective tube omitted.

Referring to the'Hrawing, in which like characters of reference designate like parts throughout the several figures, I have shown a supporting bracket comprisin a vertical portion 20 with integral paralle horizontal arms 21 and 22. The lower arm 22 is provided with an opening 23 to receive the reduced end portion 24 of a bushing 25, which end portion may be spun over as shownto secure said parts to ether. Bushing'25 is preferably threaded internally, as indicated at 26, to cooperate with a threaded pipe or wire conduit (not shown), a set screw 27 be-t ing also provided to lock the bushing and pipe against relative rotation.

The upper arm 21 of the bracket is provided intermediate its ends with an opening 28 which is sufiiciently large to rovide clearance for a securing screw 29, t e head 30 of which serves as a center contact of the socket, as hereinafter more fully described. Arm 21 is also provided adjacent the free end thereof with an upwardly projecting boss 31, which is adapted to take within a perforation 32 in an insulating disk or plate 33, as shown in Fig. 1.

Also as shown in Figs. 1 and 4, the vertical portion 20 of the supporting bracket is provided with an opening34 to receive a tongue 35 oh an insulating disk 36, whereby the shoulders 37 and 38 on the latter are adapted to abut against the inner side of said vertical portion 20. Disk 36 is provided with an opening 39 to receive an upwardly struck lu'g 40 on a terminal plate 41,.as hereinafter more fully described. While I have thus far separately described the disks 33 and 36 with reference to the functions thereof, it will be noted that said disks are of identical construction. Thus disk 33 is provided with a tongue 35 to be alined with tongue 35 when the parts are in assembled position, whereas eachof said disks is provided with an opening 42 to permit passage of securing screw 29, and each is further provided with a tongue or projection 43 to be likewise alined when the parts are assembled.

A notch 44 in each of saiddisks provides for interlocking engagement thereof with the downwardly projection portion 45 to a terminal plate 46 The body ortion of said plate is preferably substantial y pear-shaped ing with the opening 48in the latter. Openings .51 and 48 are sufiiciently large to provide clearance for the aforementioned screw 29; whereas-plate 46 isfurther provided with a downwardly projecting boss 52 to take within an opening 53 in said bottom wall whereby said plate and the screw-shell contact 50 may be locked against relative lateral movement.

The bottom wall 49 of screw-shell contact 50 is likewise provided with a pair of.diav metrically-spaced openings 54, which are adapted to insure against. engagement of the boss 31 of arm 21 with said contact (as shown in Fig. 1) it being obvious that the parts may be assembled with the downwardly projecting portions and 45 of the termlnal plates 41 and 46 in the relative positions illustrated in Fig. 3, or in reverse positions respectively. As aforestated, the terminal plate 41 is pro vided with a lug 40 for interlocking engagement with disk 36, whereas the horizontal portion of the former is provided with a tapped opening 56 to receive the shank of screw 29. The head 30 of screw 29 is separated from' the screw-shell contact 50 by means of an insulating disk 57 which covers substantially the entire bottom wall 49 of said contact, said disk .having an opening 58 to provide for centering of the screw. I also preferably interpose between screw head 30 and insulating disk 57 a metallic disk 59 having an opening to accommodate the shank 29 of the screw, said metallic disk thus serving as a clamping member and as a proper bearing surface for the screw-head 30.

Each of the downwardly projecting portions 45 and 55 of the terminal plates is provided with a binding orterminal screw 61 of conventional form. Theinsulating protective shell 62 as shown in Figs/1, 2 and 3 may comprise a section of wound paper tubing,

cardboard, or other relatively inexpenslve material. As shown, the upper end thereof;

is adapted to extend slightly above the upper end of screw-shell contact 50, whereas the lower end thereof is adapted to extend downwardly sufficiently to cover and protect the binding screws 6'1.-- Proper positioning of tube 62 is insured by the provision of a pair of slots 63 which extend upwardly from the lower edge thereof; said slots being just sufficiently wide to accommodate the projections 43, 35 and 35 on disks 33 and 36 to assist in locking said parts against relative lateral movement, whereas said tube is adapted to rest upon the projections 35 and 43' of disk 33.

In assembling the parts the metallic disk 59 and insulating disk 57 may be strung upon the shank 29 of the screw and these parts dropped into the screw shell contact 50,-

l preferably after insertion and proper positioning of the terminal plate 46 with its boss 52 engaging the opening 53 in said contact shell. Thereafter the disk 33 may be strung upon the shank 29 of the screw, with the longer projection 35 of the former extending toward the right, as shown in Fig. 1, and with the notch 44 engaging the downwardly proecting portion 45 of the terminal plate 46. Thereupon the projection 35 of disk 36 may be inserted through opening 34 in the support 20, and these parts are then likewise strung upon the screw in such manner that the boss 31 of the arm 21 enters opening 32 in disk 33 and notch 44in disk 36 engages the aroaa're aforementioned downwardly projecting portion 45 of terminal plate 46.

Thereafter terminal plate 41 is positioned so that its projecting lug 40 enters the opening 39 in disk 36, in which position the tapped opening 56 will be in alinement with the shank 29 of the screw. The head 30 of the screw is preferably fiat to provide a proper center contact, whereas the same, is provided with angular sides to permit rotation thereof by means of a suitable socket wrench. Tightening of the screw thus provides forclamping all parts between the metallic disk 59 and terminal plate 41, whereby the same are firmly secured to each other and to the arm 21 of the support. Thereafter the insulating tube 62 may be slid over the screw-shell contact 50 until the ends of the slots 63 rest upon the projections 35 and 43 of disk 33, in which position .to the tube the binding screws upon the respective terminal plates will be properly insulated and protected; so that either a metallic or insulating outer candle tube or shell (not shown) may be employed in conjunction with my device.

Although the arrangement is such that the insulating tube 62 may be readily elevatedto permit wiring of the fixture, nevertheless it is desirable to provide a fairly close fit between said tube and the screw-shell contact 50 so that the former will normally remain in assembled position with respect to the latter.

" While I have shown but one length of support for the fixture, it will be obvious that supports having vertical portions 20 of any desired length may be employed if desired; whereas it is also obvious that any suitable form of adjustable connection between the horizontal arms 21 and 22 may be substituted for the integral portion 20.

What I claim as new and desire to secure by Letters Patent is: 1

1. In a lighting fixture of the electric candle type, the combination with a metallic support comprising an upright portion and an integral arm extending at substantially right angles thereto, a thin punched insulating disk on each side of said arm and means for interlocking said" parts against relative lateral movement, a screw-shell contact and a terminal plate therefor arranged above one of said disks, said terminal plate having a portion projectng downwardly therefrom, a

center contact terminal plate arranged be- I neath the othenof said disks. said last mentioned terminal .plate also having a downwardly projecting portion, and a member penetrating all of said parts and having mechanical and electrical engagement with said center contact terminal plate to clamp said parts against relative longitudinal movement. j

2. In a lightin fixture of the electric candle type, the com ination with a screw-shell contact, a terminal plate engaging said conplates in parallel relation to each other, binding screws in said lugs, a metallic support having an arm interposed between said terminal plates, punched msulatinplates interposed between the former and t e latter, interlocking connections between the several parts to prevent relative lateral movement thereof, a

combined center contact and screw extending through all of said parts and mechanically and electrically engaging said center contact terminal plate to clam all of said parts against relative longitu inal movement, and means for insulatin said center contact from said screw-shell contact.

3. In a lighting fixture of the electric candle ty e, the combination with a metallic support aving vertically spaced horizontal arms, punched insulating disks arranged above and below one of said arms and interlocking therewith against relative lateral movement, a screw-shell contact arranged above the upper insulating disk, a terminal plate overlappin a surface of said screwshell contact an having portions in inter.- locking engagement with the same and with said insulating disks, a center contact terminal plate arranged beneath the lower insulating disk and interlocked therewith, against relative lateral movement, integral lugs dependin from the respective terminal plates, and a 'eaded screw extendin downwardly through said parts and mec anically and electrically engaging said center contact terminal plate to clamp said parts against relative longitudinal movement, the head of said screw being adapted to form the center conport having tact of the socket.

dle type, the combination with a metallic supa horizontal arm, a screw-shell contact an a separable terminal plate therefor arranged on one side of said arm, a punched insulating disk interposed between said screw-shell contact and said arm, a terminal plate arranged on the apposite side of said arm, a punched insulating disk interposed between said last-mentioned terminal plate and'said arm, integral terminal lugs extending downwardly from the res tive terall of said elements against relative latera movement, and means for clamping said elements against relative longitudinal movement, said means comprisin a combined center contact and screw exten ing through said elements and having mechanical and electrical engage-3 mleizt with said second mentioned terminal p a e. 1

5. In a lighting fixture of the electriccandle type, the combination with a metallic support having a horizontal arm, a screw-shell contact and a separable terminal plate therefor arranged on one side of said arm, a punched insulating disk interposed between said screw-shell contact and said arm, a terminal plate arranged on the opposite side of said arm, a punched insulating disk interposed between said last-mentioned terminal plate and said arm, said insulating disks being of likeshape and dimensions, means for interlocking all of said elements against relative lateral movement, means for clamping said elements against relative longitudinal movement, said means comprising a combined center contact and screw extending through said elements and having mechanical and electrical engagement with said last-' insulating disks interposed between said arm and said terminal plates, lateral projections on certain of said disks, and an insulating tube slidable downwardliyi over said parts,

said tube having upwar extending slots for cooperation with said projections to definitely position the same with respect to said 4. In a lighting fixture of the electric can- .p

between said terminalplates, thin punched insulating disks interposed between said arm and said terminal plates, lateral projections on certain of said disks, and an insulating tube slidable downwardly over said parts, a

said tube being adapted for frictional engagement with sa1d screw-shell contact and having slots extending upwardly from the lower end thereof for cooperation with said projectionsto definitely position-the tube both longitudinall and clrcumferentially ,with res ct to sai arts.

n witness w e'reof, I have hereunto subscribed my name.

GEORGE 'J, MEUER.

Images