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Publication numberUS1300832 A
Publication typeGrant
Publication dateApr 15, 1919
Filing dateOct 27, 1917
Priority dateOct 27, 1917
Publication numberUS 1300832 A, US 1300832A, US-A-1300832, US1300832 A, US1300832A
InventorsPeter F Gallagher
Original AssigneePeter F Gallagher
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flexible stay-bolt connection.
US 1300832 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)




1,300,832. Patented Apr. 15, 1919.





Patented Apr. 15, 1919.




Sgecication of Letters Patent.

Patented Apr. 15, 19519.

Application led October 27, 1,917: Serial No. 198,883.

To all whom. t may oonoern:

Be it known that I, PETER F. GALLAGHER, n citizenl of the United States, residing at New Dorp, iin the county of Richmond and State of New York, have invented new and useful Improvements in Flexible Stay-Bolt Connections, of which thel following is al specification.

This invention relates to a. flexible sta-y bolt connection for yieldingl'y connecting u rigid stay bolt with a boiler sheet in such n munner to permit the bolt to yieldV uniformly in ulfl directions Without subjecting the bolt or boiler sheets to undue stre-ilus es e result of variable movements of the parts due to expansion and' contraction'.

An object of the invention is to provide e. tlexible connection of the spring sleevetype which obviotes the use of'eliosure-eeps, which allows the bolt to have a. maximum degree ot yielding moti-on, which insures e higher degree of uniformity in the expansion and contraction of the bolt, and which comblues maximum efficiency of operation with simplicity and cheufpness of construction and general economy `nd dura-bility in use.

Another object of' the invention is to provide a spring sleeve connection which may be produced in a simpl-e manner and' with very little skilled or costly machine Work, which embodies improvedlmeans for strongly und dwmbly connecting the seine withtheY boiler sheet and permitting circulation of the Water about the bolt to en increased eX- tent to secureI greater uniformity of contraction endf expansion thereof, and which further embodies improved Ineensfor preventing the accumulation off mud, seele and other simi lfar obstructions Within the sleeve.

The invention consists of the features of construction, combination and arrangement of parts, hereinafter fully described and; clei'med, reference being had to the eccompanyingdrawing, in` which Figure 1 is a View showing the end of' a. stay bolt in side elevationand the boiler sheet and' sleeve in section, the plane of seetion being longitudinally of or parellel with the exis of the bolt.

Fig. 2 is a. vertical transversesecti-on on line 2"-2 of' Fig: I.

Fi s. 3, 4i and 5 are views illustrating certain consecutive steps of manufacture in producing e form of spring sleeve embodying my invention.

dared end spread to Fig. 6' is a ViewV Simile-r to Fig. 1, showingA a modified form of spring sleeve.

Fig. 7 is a. transverse section on line -Z of 6'.

Fig 8f is :i` view simi-ler to Figs. 1* and 6, showing another modified* form. of'sleeve and. a modified; form of bolt.

Fig. 9 is e vertice] transverse section on line 9-9 of 8*.

Referring to the draw-ings, l design-etes u rigid stay bolt, one endl of which is threaded for engagement with a threaded opening inf the inner boiier sheet, such threaded construction not being shown, and the other end of which is threadedz at 2- for engagement With e bushing or sleeve 3: {itted in theouter boiler sheet 4. rrlhe tlireeded end Q of the bolt is provided with an abutment heed 5` end en angular stud crfprojeetion 5", such stud being adapted for engagement with a. Wrench or s imiler tool employed for threading it into or out off engegement with the inner boiler sheet andi bushing.

The bushing or sleeve 3` is mede oic spring metal and is preferably drop rged o-r otherwise struck up from e single piece of sheet mete-11l It comprises e tubo-ler innerend 6 fitted Within an opening inthe sheet 4f, an instruek tubular outer end 8 internelly threaded to receive end engage the threaded end 2r ofj the bolt, an ereuately curved, bowed o1' Soren-shaped bodyl portion 9 connected at its outer portion with seid instruek tubular end 8, und' im agir lerly disposed neck poll-tion 1:0# oonnectigthe said body` portion 9 with the tubular inner end Ortion 6;

The tub r` imner end rtion 6 mede initially of slightly smal er diameter than the opening 7 the Sheet 4 and, after being fitted in said' opening, isexpanded int'o en-l gaiement with 'the thereof to folrma, tigt connection.l l'n addition the; inner extremity of said end 1gortion 6 is preferably- I rm a bea/d 11` engaging the inner or Waterside of the sheet, thus increasing the seclufityof the mechanical connection and additioneli A sealing the, joint against leakage. The, mternagl threads of the outer end portion 8' ere suitably formed after the bushing or slfeeve is made md prior to its applcation to the sheet 4, and; other said bushing is applied the bolt 1 is inserted therethrough `from the exterior of seid sheet, end screwed at its innerv and outer ends into the threadcfdjt opening in the inner sheet and into the end portion 8. The head 5 of the bolt is initially formed thereon yand by means of the angular stud or projection 5 the bolt may be readily and convenientil screwed into and out of lace. When t e bolt is applied the flat 'ace of the head 5 bears against the outer face of the end portion 8 and preferably against a soft metal gas-- ket or packing ring 12 fitted in a recess 12 in the end portion 8, thus preventing leakage of water and steam throughthe threaded joint. By the mode of connection described the use of caps is avoided, and the practice of upsetting or forinin the head 5 after application of the fbolt o viated. As la result the bolt may be removed by simply unscrewing it when it is necessary to replace it with a new bolt, and without the necessity of drilling out the bolt as when applied in the customary way.

In vaccordance with my invention the body portion 9 of the bushing or sleeve is made scroll-shaped, or arcuately bowed or curved on a comparatively wide radius, and said body portion 9 is connected. with the outer extremity of the tubular inner .end portion 6 by a neck portion 10 which flares outwardly with relation to said inner end portion substantially at an acute angle thereto. By reason of this construe tion several desirable and important advantages arel obtained. In the Vfirst place the walls of the body portion and neck are spaced from the outer end .portion 8, which projects into said body portion, thus forming an annular channel 13 extending entirely around the portion 8 and threaded end of the bolt and an outwardly diverging passage 14 leading from the bore of the inner end portion 6 to said channel. The end portion 8 isthus entirely spaced from the internal walls of thev bushing, allowingl the water from theboiler ,tofilow` freely into the body of 'the bushing and about'the threaded joint, so that the bolt, 1 will be heated to a more uniform degree throughout and a greater degree .of ,uniformity of ex ansion and contraction` thereof secured. t the lsame time, owing vtog, the described curvo of, lthe body portionand its spaced relationship to the endportion, the end portion 8. is free to have a wide range of flexible motion to permit ofjand compensate ,for longitudinal and universal lateral; expansions and contractions of thebo1ts. and sheets, dueto variations in the expansion and lcontrac ition thereof. In,these movements the Aouter end of the bolt will be, supported solelyby the end portion Sand .the dy portion4 9. is free to .hays springrniotionior flexing actionat three points, to wiaator l.about its center, at or about itspoint ofeonnection with the neck 1Q, and at or about its point of connection with .the end refrtien giving e Wlder range of flexibility than would be possible it' the end portion 8 were in contact at any point with the body portion or neck. Fui'- thermore, the area of the channel 13 is such as to avoid the accumulation of a sufficient amount of mud, scale or other deposits liable to interfere with the flexibility of the portion 8, and as the Water can have a free circulation between said channel and the space between the boiler sheets the washing out of more or less of any foreign matter which may be deposited within the channel is insured. By disposing the neck portion 10 at the angle stated the passage 14 is made of comparatively wide area and at thesame time a V-shaped space is produced between said neck portion and the outer surface of the sheet 4 for the reception of a welding compound 15, whereby the bushing or sleeve ma be welded to the sheet when such an ad itioiial mechanical fastening and sealing action is desired.

An important advantage incident to my construction resides in the fact that by providing a bushing or sleeve of the forni shown, such 'bushin or sleeve may be entirely or substantie ly of uniform thickness throughout, gaining its wide range of flexibility or s ring action from its peculiar formation, an obviating the necessity of securing a spring action by making the buslr ing of variable degrees of thickness throughout. I am thus enabled to drop-forge or otherwise form the bushing or sleeve so as to be initiall of uniform or substantially uniform thic ness, and without the necessity of employing expensive machine Work, where by a bushing of maximum simplicity may be produced at a. comparatively low cost from the standpoint of material and labor.

In Figs. 3, 4 and 5 I have illustrated one method of manufacturing the bushing which may be employed. In carryin out this method a blank 16, composed o a disk or plate of sheet metal of proper form and size, is first formed, such blank being rovided with a central opening 17 of a orm to receive a projection upon a male die. B the action of male and female dies the blank is then iven the shape shown in Fig. 4, in which t e body portion of the blank is struck up into tubular sha e and the central portion thereof projected into the outer end thereof, such portion producing the outer end portion 8 of the finished bushing. The inner end portion of the tubular body shown in Fig. 4 is then contracted or sw ed inwardly, as shown in Fig. 5, resulting in the reduction of the inner end portion 6, the d portion 9 and the neck portion 10. After the bushing is formed asshown in Fig. 5 the interior of the end por-tion 8 is threaded in any ordinary manner and the bushing applied to the sheet 4 in the manner previously described. This method alwhichpurposes the. said end portion may be modifiediin :forni lbya, secondary shaping action. By mimethod of construction it is Vpossible toi-ilsmmuoh lighter material than `lsarequired ,in ,the-,use iof machined sleeves,

ranitem ofadvantage in thatit is a` well known fact in ,boiler construction that the lighter the material .used (with proper fac- .tor ,of safety) the longerrthe life of the `iboiler and leSS liability of cracking of plates.

VBy employing the .Inode of application shown .in Figs. 1 and 2, and also in Figs. 6 and 7, as hereinafter described, I do away with the necessity of threading the bushing .into the boiler slieet,reducing the `cost of constructionfand liability of leakage. In AEigs. 1 and 2,1 have shown the use of a clearer device 4,for cleaning ,the bushing of any `accumulated mud, scale or other deposits when desired. ',llhis clearer device consists-pcf alink chainflSof. ring form which surrounds the boltand which is secured at diametrically opposite sides of the bushing. ito threaded plugs 1 19, fitted -in threaded openings in the body of the bush,- ing. Under the normal circulation of the water and steam this chain is kept slightly in motion to breakup the deposits and allow them to be washed out. Whenever any accumulation of deposits occurs, however, by simply removing the plugs 19 and using them as finger pieces or manipulating devices the chain may be moved back and forth within the bushing to free the deposits for a clearing action.

In the modified form of my invention shown in Figs. 6 and 7 a bushing of the same general construction as that illustrated in Figs. 1 and 2 is disclosed, the only difference being that instead of positively Hanging or beading the portion 6 a slight flare or lip is produced, as shown at 11', to seal the joint between the bushing and wall of the opening 7 and assist in holding the bushing against any liability of outward displacement.

In the form of my invention shown in Figs. 8 and 9 the portion 6 of the bushing is illustrated as externally threaded at 6 to fit within a threaded opening 7 in the boiler sheet 4, which construction may be employed when desired, and in this form oi the invention also the outer end of the bolt is provided with an inner cylindrical threaded .portion 20 having an outer flarin or tapered threaded portion 2.1 to fit witiin correspondingthreaded portions 22aud 23 of the inturned end portion 8', enabling a secure fastening and sealing connection to be produced when it is desired to dispense with the use of a washer. In this form of the invention I have also shown the outer endof the bolt 1 provided with a tell-tale passage `24 opening through its outer extremity,

whereby in the event of the fracture of the bolt steam will be allowed toV escape to the atmosphere to indicate a leak and jthat replacement is necessary.

Having thus fully described my invention, I claim:

1. A Iflexible sleeve for stay bolts having a tubular inner end portion to fit within an opening in a boiler sheet, a tubular, internally threaded outer end portion projecting into and terminating withln the body of said sleeve,ra body portion curved on the arc of a circle to form a spring member, said body portion being of greater diameter than the tubular inner end portion., and a neck ortion extending outwardly at an angle rom the tubular inner end portion and connecting the same with the body portion, said body portion and neck portion being continuously spaced from the inwardly projecting outer end portion to provide an annular channel around said tubular outer ,end

portion and a passage connecting said chan- A.stantially' of like thi-ckn-ess throughout.

2. A fiexible sleeve for stay bolts formed from a single piece of material of substantially uniform thickness throughout, said sleeve comprising a tubular inner end portion, a tubular ou-ter end portion projecting inwardly into and terminating within the body of the sleeve and adapted for connection with an end of the stay bolt, a body portion curved on an arc of comparatively wide radius and connected at its outer side with the outer portion of the sleeve, and a neck portion extending substantially at an acute angle outwardly from the outer extremity of the tubular inner end portion and connecting the same with the curved body portlon, the inner extremity of the tubular outer end portion being constantly spaced at all points from said body portion and neck.

3. Means for yieldingly attaching a stay bolt to a boiler sheet, consisting of a housing having terminal axially alined and permanently spaced sleeve members for engagement respectively with the bolt and sheet and a relatively bulged resilient annular arched member connecting said terminal members and maintaining them permanently in axially movable relation.

4. Means for attaching a stay bolt to a all boiler sheet, consisting of a housin for receiving a bolt, and comprising axial y alined independently movable, permanently spaced sleeve members connected by an annular axially yieldable arch member, one of said sleeve members being engageable with a boiler sheet and the stay 'bolt being engageable with the other sleeve member and axial extension through the first named sleeve member. f

5. A stay bolt anchoring device consisting of an annular longitudinally arched housing having terminal reduced permanently spaced sleeve members for respective engagement with a boilersheet anda stay bolt.

6. The combination with a 'boiler sheet having an openingtherein, of a stay bolt connection comprising a bowed body portion curvedon an are of comparatively wide radius, an outer internally threaded end portion projecting into said body portion, an inner end portion of relatively smaller diameter than the body portion and fitted in the opening in the boiler sheet, and a neck portion extending outwardly at an angle between the inner end portion and the body Jortion, said neck portlon being arranged to orm an angular space between the Same and the boilersheet, and a welding material disposed in saidspaee and welded to the neck portion and boiler sheet.

7. A staybolt anchoring device consistin of terminal spaced sleeve members connecte by an annular bulged intermediate member capable of flexion to permit relative axial movement of the terminal members, the latter being adapted for respective engagement with a stay bolt and a boiler sheet.

8. A stay bolt connection for boiler sheets comprising a bushing sleeve, a bolt extending through said sleeve and in threaded engagement therewith', a clearer within the sleeve for the removal of deposits, andmeans for manipulating said clearer.

9. A stay bolt connection for boiler sheets com risinor a'bushing sleeve, a stay boltexten ing t rou h and inthreaded en agement with sai s1eeve,a ringmhaped c earer of link material disposed within the sleeve and surrounding the bolt, and manipulating members engaglng the sleeve and adapted for disengagement therefrom whereby said clearer may be manipulated.

10. A Stay bolt connection for boiler sheets comprising a sleeve in which a portion of a stay bolt is adapted to 4be mounted, and means Within said sleeve actuated by the circulation of water and steam therein to reduce accumulation of de osits.

11. A stay bolt connection for boiler sheets comprisinga sleeve pin which a portion of a stay bolt is adapted to be nl ountc, and means within said sleeve-adapted -to surround said boltand-aetuated by the circulation ,of WaterV and steam therein to reduce accumulation of deposits,

In testimon ywhereof I aliix my signature,


Copies of this patent may be obtained tor ave cents each, by addressing the "Commissioner or latente.

Washington, D. 0."

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3516629 *Sep 23, 1968Jun 23, 1970Plessey Co LtdSpring-supported unit plates,more particularly for gramophone record players
US4169630 *Mar 2, 1978Oct 2, 1979Illinois Tool Works Inc.Sheet metal nut
U.S. Classification411/379, 411/999
Cooperative ClassificationY10S411/999, F22B7/16