US1122494A - Bowl for suspension-chains. - Google Patents

Description

S. GARVIN.

BOWL FOR SUSPENSION CHAINS.

APPLICATION FILED NOV.17 1918.

THE NORRIS PETERS CO.. PHOTO-THO WASFHRGYUN. D. C.

Patented Dec. 29, 1914.

UNITED STATES PATENT 0 Fl E- sAMUEL, GARVIN, OF CHICAGO, ILLINoIs.

BowL r03 SUSPENSION-CHAINS.

i Specification of Letters Patent. Patented Dec. 29, 1914:.

Application filed. November 17, 1913. Serial No. 801,452.

To all whom it may concern:

Be it known that I, SAMUEL GARVIN, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and use- .ful Improvements in Bowls for Suspension- Chains, of which the following is a full, clear and exact specification.

This invention relates to improvements in bowls for suspension chains commonly employed for suspending electric lamps from a ceiling in which chains there is a bowl heretofore solely for ornamental purposes, to which end the electric light wires from the ceiling to the lamp are entwined with the chain and are passed through a bowl of spun metal.

Prior to my invention for the purpose of directing electric wires through bowls of following their stretching between the links of the chain for any slack necessary after a break in the wires and particularly when such a break occurs next the lamp socket for the re-attachment of the socket following such a break.

In other words in order to prevent th wires from disfiguring the general appearance of the chain, they are necessarily drawn taut in their passage in and out through the links of the chain both above and below the socket. and the socket is secured so close to the end of the chain that when from any cause the wires are broken adjacent that point they are then too short for re-attachment in the absence of v splicing the' wire, which obviously is obiectionable because of the time required, if for no other reason.

The prime object of my invention is to dispense with the passageof a tube or other conduit for the wires through the bowl, and

to have the loops not only permanently but attractively secured directly to the bowl in bent over and-against the flange 8 the absence of any necessity for screwthreadsthereon, and'at the same time, to utilize the bowl for concealing a substantial length of slack in wires stretched taut through the links in the chain at both 1 ends of the bowl, and whereby when said wires are broken at any point between the bowl, and the lampsocket, there is ample slack in both wires for their re-attachment V to the socket.

A further object of my invention is to provide such a form and means of connection of the loops with the opposite ends of the bowl that the wires may be passed therethrough in the easiest and quickest possible 3h manner both by a direct and twistingthrust of the wires.

Another'object ofmyLinvention is to reduce to a minimum the cost of construction I of the loops for a .chain suspended bowl, and

likewise the cost of assemblage of the loops and bowl, and the latter by means not only preventing the accidental detachment of the loops from the bowl, but in such a manner as to promote the beauty of their subsequent nickel or other plating.

\Vith these ends in view, my invention finds embodiment in certain features of nov elty in the construction, combination and arrangement of parts by which the said objects and certain other objects 'are'hereinclaims. I V

In said drawlng: Figurel illustrates in side elevation a chain supported bowl in its operative position with a lamp socket secured to the bottom end of its chain. and

Fig. 2 is a central vertical section through a bowl and partly through both of its loops.

Similar characters of reference indicate the same parts inthe figures of the drawing. The bowl of the structure in which mv 1n vention finds embodiment consists of an upper half 3,. andlower half 4, each of which halves are of spun'metal similar in outline. converging-toward their outer ends where they terminate in necks 5 and .6 respectively., thetwo bowls being'provided at their meeting ends by the usual lock joint 7 formed by a n'arrowflange '8 on one bowl,

and a longer flange 9 ou the opposing bowl,

so I

As originally formed the neck ends 5 and 6 of the bowl extend outwardly at an oblique angle to the axis of the bowl for receiving a bead 10 formed on the hollow. shank 11 of loops 12-42 at each end of the bowl.

Preceding or following the forming of the lock joint between the two parts of the bowl, as may be, the loops are assembled therewith by first seating them in their operative position against the flaring ends of the bowl, whereupon these flaring ends are bent inwardly and crimped over and upon the beads 10, of the loops, and which may be by any machine or instrument suitable for that purpose, and adapted to form a tight joint locking the loops to the bowl against the possibility of their accidental detachment therefrom, and whereby they are capable of sustaining the weight of the chain, lamp socket and its attachments, the joint being preferably so' tight that there can be no swivel action producing a friction wearing away the desirably necessarily very thin adjacent walls of the bowl. In this connection it may also be observed that the loops may be cast to form shown in the drawings, and successfully employed without further manipulation, such as smoothing, etc.

With a bowl and loops constructed and connected as above described the surface is thereby provided together with the form of joint and manner of forming it as shown in the drawing, provides a surface throughout the structure which shows no seams or joints and correspondingly enhances the beauty and adds to the commercial value. of bowl structures of this class as a whole. As desirable as is this advantage of plating finish it is of small importance as compared with the functional advantages provided for by my invention, namely the facility with which electric wires may be passed through the bowl and its loops and the still more important advantage providing as it does for concealing within the bowl all and even more slack in the wires than under ordinary circumstances it may be necessary to take up when the wires are broken from any cause, or otherwise injured in or adjacent the socket. In other words it will now be observed that the walls of the loops at their inner ends are flaring on a curved line as indicated at 13 in Fig. 2, and thereby form with the adjacent inner walls of the bowl a substantially uninterrupted surface with the result that on passing either twistedelectric wires, or untwisted wires either simultaneously or separately through the neck of one loop, these wires are directed either by a straight push or by a twisting push by the walls of the bowl to contact with the opposing loop, and thence by reason of the flaring form of the inner end of the loop therethrougln and into the eye of the loop to a position accessible for conducting it therefrom, while at the same time ample space remains in the bowl outside of the direct path of the wires therethrough for holding slack in the wire by coiling it therein for subsequent use. This provision by which there may be slack in the wires which may be subsequently concealed from view within the bowl provides the slack in the wires below the bowl, facilitating their being secured to a lamp socket for the reason thathe has more length of wire to work upon in making the attachment, which slack may be subsequently readily taken up and concealed by the bowl, following the securing of the socket to the lower end of the chain on pulling it taut between the socket and the bowl followed by pushing the thus accumulated slack into the bowl.

Inaddition to the advantage of having slack concealed in the bowl for subsequent use when from any cause the wires are broken, at any point between the bowl and the lamp socket, there is the further advantage of storing up in the bowl suflicient slack in the wires and its subsequent reattachment to the socket following the lengthening of the chain either below or above the socket, and which not infrequently is required.

In conclusion it should be observed that my invention is not limited to the precise form and means by whichthe bowl is constructed, nor to the form of oint between the bowl and the loops or of the loops, whether made from cast metal, or otherwise, so long as the walls of the inner projecting ends af the loops are so jointed to those of the bowl as to prevent the substantially unobstructed passage of electric wires therethrough, and so long as the capacity of the bowl is su'liicient for inclosing and concealing .a reasonable amount of slack in those wires.

Having described my invention, what I claim and desire to secure by Letters Patent is:

1. As a new article of manufacture bowls for suspension chains comprising loops at the opposite ends of a bowl, the metal of which bowl is upset upon, and thereby directly locked to the loops.

2. As a new article of manufacture,bowls for suspension chains, comprising a hollow bowl, loops at each end thereof provided with a bead upon which the metal of the bowl is upset and directly interlocked therewith.

3. As a new article of manufacture bowls for suspension chains comprising a spun vided with an openingregistering witha "passage directly through the bowl.

4. As a new article of manufacture, bowls for suspension chains, comprising a hollow bowl of spun metal, provided with a loop at each end thereof having beads upon which the metal of the bowl is upset and interlocked, the shanks of which loops are provided with passages therethrough for electric Wires, Which passages are substantially smaller than the chamber formed by of November, A. D. 1913.

SAMUEL GARVIN. [1 s.]

Witnesses: p

MlLDRED ELsNER, JNO. G. ELLIOTT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent.

Washington, D. C.

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