US1382049A - Method of securing a nipple to a hollow shell and article produced thereby - Google Patents

Description

R. s. ASPINWA'LL.

METHOD OF SECURING A NIPPLE TO A HOLLOW SHELL AND ARTICLE PRODUCED THEREBY. APPLICATION FILED JUNE Z Zl I920.

1,382,0Q9, Patented June 21, 1921.

' UNITED STATES PATENT OFFICE.

, ROBERT SAYER ASPINWALL, or nnrnorr, MICHIGAN, ASSIGNOR 'ro LINCOLN M FACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

METHOD OF SECURIN'G'A NIPPLE TO A HOLLOW SHELL AND ARTICLE PRODUCED- THEREBY.

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To all whom it may concern:

Be it known that I, Bonner WALL, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful improvement in Methods of Securing a Nipple to a Hollow Shell and Article Produced Thereby, and declare theiollowmg to be a full, clear, and exact descript on of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to'the accompanying drawings, which form a part oi: thls specification.

My invention relates to an improved connection between a shell or hollow easlng and a nipple carried thereby and my improved process of manufacturing the same.

In the drawings, it is shown as a shell adapted to serve as the ball end for a lighting fixture rod or tube provided with a n1pple secured thereto with my 1mproved form of connection in such a manner as to prevent rotation of the nipple therein and so as to resist all action tending to loosen the same in the shell.

Figure 1 is an elevation oithe completed article.

Fig. 2 is an elevation showlng the shell and nipple separated from each other, the shell being cut through on line 2-2 of Fig. 1.

Fig. 3 is a view looking in the direction of the arrow on line 3-3 of Fig. 1. I

Fig. 4 shows the method of crnnping the nipple" in position showing one form of punch and die therefor.

Fig. 5 is a section showingthe nlpple in position secured to the shell.

In the securing of a nipple to a shellor hollow casing, the defect in the method followed in the past has been that the connection formed between the nipple and shell has been insecure and the nipple has worked loose under use. This ,,de:t'ect has been particularly noticeable in nipples required to support a weight as represented the 111pple carried in the ball end of a lightmg fixture bracket and tubes provided witha ball end so provided with a nipple from which is suspended a fixture or lamp.

I provide a metal shell and nipple of conventional design. The shell a. is adapted to Specification of Letters Patent.

SAYER Asrm- Patented J une 21, 19ml.

Application filed June 22, 1920. Serial No. 390,983..

be received over the end of a rod or tube, and the nipple b. is threaded at one end as at o to receive a fixture or lamp support, and provided with a radial shoulder 03. adapted to abut the outer surface of the wall of the shell when the nipple is inserted through the aperture formed through the shell wall.

A section of the wall of the shell is punched out as shown in Fig. 2, the punched out section of shell wall being forced inwardly in the form of separated tongue like portlons e. The punching out of a section of shell wall would serve to split the wall section into separated segments forming tongue like portions as shown. A nipple is then inserted through this aperture. The

end of the nipple which projects interiorly portions of the shell and such tongue like portions are laid back against the interior surface of the shell wall as shownin Fig. 3. This interlocking of the sections of the nipple and the shell, and the bending of the same back against the wall of the shell firmly secures the nipple in position so that it will not work loose in any direction.

A preferred method of manufacture would be to punch out the shell as shown. in Fig.2, the tongue like projections being forced interiorly as shown; then insert a nipple in a punch such as g. Fig. 4:, pass the end of the nipple through the aperture in the wall, of the shell, and then by means of a punch or die as it. provided with a tapered end adapted to be received within the end of the nipple, and as the punching operation. progresses force outwardlyj the wall of the, nipple. This punch is adapted to split the wall of the nipple as it forces its way inwardly. It is here shown as being provided with radial flanges 2". adapted to force tongue like portions of the nipple outwardly into the interstices formed between the'bent back tongue like portions of the shell. and under continuance ofpressure force the tongue portions both of the nipple and shell back against the wall of the shell, thereby locking'the nipple against rotation relative the shell. The completion of the punch operation would bend back the tongue like projections of the nipple and shell against the interior surface of the wall of the shell, locking the same firmly in place as the radial flange cl. forms a support for the shell upon the nipple the tongue portions formed from the wall of the shell.

2. The method of securing a nipple to a shell, which consists in punching out a section of the wall of the shell to form an aperture therethrough, the punched out section of shell wall being forced inwardly into the shell in the form of separate tongue like projections, inserting a nipple provided with a radial shoulderthrough such aperture until the shoulder abuts the shell wall, splitting the end of said nipple and forcing outwardly the split apart tongue like portions of the nipple into the interstices between the tongue like portions of the'shell against the shell wall'so as to lock the nipple and shell together against said shoulder.

3. The method of securing a nipple to a shell, which consists in forming an aperture through the wall of the shell by punching inwardly a section of the shell wall in the form of separated tongue portions, inserting a nipple provided with a shoulder into such aperture until the shoulder, abuts the outer surface of the shell. wall, securing such nipple in position by splitting the interiorly projecting end thereof and forcing outwardly tongue like portions thereof into the openings between the tongue like portions of the shell so as to interlock therewith, bind-; ing the shell against the shoulder of the nipple.

4. The method of securing a 'nipple to -a shell which consists in forming an aperture throughthe shell wall by punching inwardly a section thereof in the form of separated split apart tongue like portions, inserting a nipple providedwith a radial shoulder through such aperture until the shoulder prevents further entrance of the nipple therein, clenching the end of the nipple outwardly and against the shell wall forcing the shell against the shoulder of the nipple by forcing split apart end portions of the nipple into the openings between the separated tongue like portions of the shell wall locking the nipple and shell together.

5. lnan article of manufacture, a shell provided with an aperture through the wall thereof, the section of which shell wall is punched out to form such aperture being broken and bent back inwardly of the shell in the form of separated' tongue like portions, a nipple secured to'said shell by being passed through said aperture and having split apart end. portions thereof bent outwardly interlocklng in the interstices between the tongue like portions of the shell wall.

6. In an article of manufacture, a shell through the wall of which an opening has been formed to receive a nipple, the sectlon of shell wall through which the aperture has been made being forced inwardly into the shell in the form of separated tongue like portions laid back radially of the aperture against the interior of the shell wall, a nipple formed with a shoulder adapted to abut the outer surface of said shell wall carried in said aperture the interiorly projecting end of said nipple as regards the shell belng split and the split apart sections bent outwardly in such a manner that-split apart sections of said nipple dovetail between the tongue like portions of the shell wall.

In testimony whereof, I sign this specification.

ROBERT sAYiaR ASPINWALL.

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