US1034643A - Method of manufacturing bolts. - Google Patents

Description

. the xstey bolts. are employed;

EJ STTE@ oyeron semmai mi. smeer-esem on New Yon-m11. Y., Aezonoxi 're rennen smeer. VALVE contraer, e. seasons-'riore on poss Emision or mesorso'runmoson'rs.

pecicetou o! Letters Eetmt.

temmen@ 1li-.ee ecouter 13:36. teel Se. seat??- To all whomit may oe- Be it known tn in' el. l

sobr, e citizenof etes, dent of New orl -Quietly o Non orlfz,

State ofNewiorlne-ve invented en in )rovernent in Methos o? Manufacturing olts, of which the following is a. speeica- Y tion.

My invention 'has reference to methods of manufacturing bolts sind consists of certa-in improvements whio`nere ullv setforth in the ffollowingspecifioation enti shown in the 'accompanying drawings which form e part thereot` The objeoto nl? invention is `to Error-idle e construction di Ae sta-y bolt -or steers b'oilere und bolt. for other purposes whieh. shall embody greet.teneileSstrength coupled with elasticity whereby the bolt may adept 'itself in use to the -roquently'ourring changes in stress Vdue to expansion enf-l .oontreotion of. the re box sheets-, tnbesjor. other parte of 'the boiler or other'epperatus' in'wliicli My invention consists of the method hereinafter .described for makig'e stay bolt formed of'a solid rod ofsteel or other metal .having -adg'stinetl fibrous 'strueturein which. thebers' run longitudinally of the bolt and preferably twisted into helical .inforged and artly nished condition; enel .Fig. 9 an e bolt, f

A A represent a' large number of steel wires laid together or bent upon themselves as'at B. The Wires` may be leent over upon ovation of the finished .s tny themselves a nuinbenof timi if so desired' l one of such bends being suiiioient for illus-A tration. .The series of fibrous parallel strands-so arranged may be then brought to' a welding heat and subjected to compression by any ofthe well known metbos, such as be round or of any geometinclusive, In the casos of those' @ross sections Whxeli ere not round, there may be n series of outer longltudiiml-masses free-entes Ang. o, 1912,

or compression in diesu'@ i of tlie fibrous bar thus ,non es shown, for example, in

l'l of maximum raclii with interposed dev 'pressed portions'D of minimum radii so as to give more elasticity to the Stay'bolt in its eomple'ted form. The oer so formed 'will be exceedingly tough sind strong and 4-of la.-

lzigbly '-bfous chereef'er,"tlie beingr' longitudinally errangerl and oolieringsoas to give greet elasticity to transverseor tor.- sionel strains coupleeiwith great strength against rupture in tbedireetion of the length l of the bolt. I-brave disclosed what-[believe to be the liest method of preparin'givthe' .fibrous ber from which the stay boltsf-a're to be mede,-but .I do 'not restriotor-onne. myself to this or any method -ofprepafring sind the opde upseiinto cylindrical form v'the -ibrou'sbar so long as the nishedbur'gis n solid and homogenous ancil-withestrongly-1'E 'so fforniedmey be out into-definite. lengthsw of greater cross section than 'the interme4`l dia-te or ooy portion es indieated' iniFig'l'S in which G is the body ortion end F-YF. the upset end portions.

bolt into plee-e The body portion moy then stf ne of these end j Y portions may be provided 'with s, squgrefboss H or otherwise formed for receiving a. wrench or suitable tool for screwing the form, the twist et the surface extending .Y preferably through Adegrees. This helieel twist of the fbers will usually be' some?- whet more extended et anti near the srfa anni more especially of the parts .t2-.1E greatest vredii 'than attlie more oepseetedpotions, I but as the letter sie bound mend protectedgl'o by the outer portions, it is more necessary to give to seul outer g rtons the-proper yvhen'the body bems the tendency 'is to relieve the tension upon one portion of the! length lofeny ber while putting strain upon enother portion thereof and vice versa so that the total length of me; bersm'aking iid up the body portion is not materially altered under any normal strains. Moreover, it is evident that as the greatest stress under bending comes upon the fibers nearest the surface such is compensated for by the reater helical twist given to these bers. Vhile the best form of the body is one in which the bers are so arranged that any nber is preferably at approximately uniform distance from the center throughout its length, it is evident that this condition may be modified by intertwisting of the fibers which may intentionally or unintentionally -occur in the preparation of the fibrous bar.

Then the stay bolt is prepared in the form abovedescribed the upset ends are screw threaded so as to be capable of being screwed into the steel sheets to be connected.

preliminary to being made steam or Water tight by riveting or Hanging out the ends into heads in the customary manner. The completed stay bolt ready for use is shown in Fig. 9 in which-I indicates the helical twist-ing of the fibers of the body and J J the screwthreaded ends. The cross section of the body part shown in Figs. 8 and 9 is indicated as circular butmay be of any otherA section such for example as in Figs. 3 to 7' inclusive. The stay bolt may be made ot steel, iron, bronze or other metal, and if of steel, may be tempered, if so desired:`

In this application I do not make claim to the bolt structure, as, thatis reserved for a separate application. Y

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

l. rlhe herein described method of making a bolt which consists in orminga fibrous bar bywelding together and densifyinga plurality of wires of small cross section into a solid bar upsetting the ends of the bar into 4a greater cross section than the intermediate portion of the bar, twisting the bar upon itself, and cutting screw threads upon the upset welded ends. Y

2. The method of making a bolt which consists in placing together a large number of parallel wires of small cross section, heating the said wires to a welding temperature and welding them throughout their length into a solid -bar whereby it has a strongly developed longitudinal librous composition, and finally rolling or drawing the welded bar to the desired cross section and density from the center outward and throughout its length.

3. The method of making a bolt which consists in placing together a large number of parallel wires of small cross sect-ion, heating the said wires to a Welding temperature and welding them into a solid bar whereby it has a strongly developed longitudinal fibrous composition, finally rolling or drawing the welded bar to the desired cross section and density from the center outward, increasing'the diameter of the ends by upsetting, and screw threading said upset ends.

4. The method of making a bolt which, consists 'of parallel wires of small cross section, heatin placing together a large number ing the said Wires to a welding temperature l and Welding them throughout their length into a solid bar whereby ithas a strongly developed longitudinal fibrous composition from' the center outward, densifying the bar by-reducing its cross section byrolling or

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