US1353640A - Fire-box for boilers - Google Patents

Description

C. DUCAS. FIRE BOX FOR BOI LERS.

APPLiCATION FILED JULY 10.. I917.

Patented Sept. 21,1920

4 SHEETS-SHEET I.

W W m w w m m H. M 6 I C. DUCAS.

FIRE BOX FOR BOILERS- APPLICATION FILED JULY 10. 1917.

Pabemad Sept. 21,1920.

4 SHEETS-SHEET 2.

Patentetl Sept. 21, WW.

M o o o o o o 4 SHEETS-SHEET 3.

ifitlzaasels cl mates DUGAS, or New Year, 1v. Y.

FIRE-BOX For; BOILERS.

Specification of Letters Patent. I f t t Sept 1920 W 9 j Application filed July 10, 1917. Serial no. 179,639.

1 '0 aZZ whom it may concern:

Be it known that 1,. CHARLES DUoAs, a citizen of the United States, residing in New York city, in the county of New York and State of New York, have invented certain new and useful improvements in Fire- Boxes for Boilers, of which the following 18 a specification. D

lhis invention relates to improvements in i sectional stayed fire boxes, the primary object of which is to provide a lire-box construction in which stay bolts have a universal connection with the outer or wrapper sheet of the fire-box and also a universal connection with the inner or crown sheet thereof whereby all unequal or excessive strains due to expansion or contraction of the parts or such other strains to which the ordinary fire-box is subjected are prevented. Another object of the present improvement is to devise a stay bolt so constructed that each end thereof is universally movably mounted within supports which are carried by the inner and outer walls of the lire-box.

Another object of this invention is to provide a fire-box construction in which both the wrapper and crown sheets thereof are sectional, stay bolts being connected to 50 the joints of one shell and between the joints of the other shell.

' A still further object of the present improvement is to construct lire-box using a crown sheet composed of U-shaped sections and slotting the vertical edges of the L -shaped sections, or otherwise removing a portion of the metal therefrom, whereby the inequality of expansion and contraction of the horizontal walls relative to that of.

the vertical legs of the sheet is compensated, the inequality of expansion being due to the difference in the proximity of the horizontal walls and vertical legs of the crown sheet to the fire. This equalizing and compensating action will augment the universability of the relation between a crown sheet and. wrapper sheet which are connected by universally movable stay bolts.

2 A still further object of the present improvement is to provide fire-box construction in which the flue sheet, back head and door plate are butt welded to the mud ring,

wrapper and crown sheets permitting the boiler to be made much cheaper than those Where flanges and rivets are employed, thus Other and further objects of the present improvement will be set forth in detail in the following description and drawin s in which i v u Figure 1 is a fragmentary vertical sec-] tional view through one of the flexible stay bolts and showing its connection to the wrapper and crown sheets of the fire-box.

7 big. 2' is a vertica' sectional view similar to lug. 1 and taken at'right angles thereto.

Fig. 3 is atop plan view of the brackets which are applied to the joints of a sectional sheet for receiving one end of a stay bolt. f i

Fig. 4 is a view similar to Fig. 1 encept showing the stay belt applied to a sectional crown sheet between the joints of which a i stay sheet is interposed.

Fig. 5 is a fragmentary vertical section through a fire-box in which both the crown sheet and wrapper sheet are sectional and showing the attachment of the stay bolts thereto.

Fig. 6 is an end elevation of a fire-box construction provided with my improve ments showing the same partly broken away to show the flue sheet.

Fig. 7 is an enlarged fragmentary perspective view of one section of the crown sheet showing the same slotted to compensate for the relative difference in the expansion and contraction of the horizontal an vertical walls thereof.

Fig. 8 is a vertical sectional view through a fire-box constructed in accordance with my improvements and showing in detail the welding of the flue sheet, door sheet and back head to the mud ring, crown sheet and wrapper sheet. Y

Fig. 9 is a fragmentary perspective view illustrating the usual method of connecting the doorplate'and crown sheet.

Fig. 10 is a fragmentary perspective view illustrating the improved method of attaching the door plate to the crown sheet by butt welding.

All of the improvements hereinafter to be described in detail pertain to fireboxes of the Jacobs and Shupert type as illustrated in Patents Numbers 917,172; 982,723, and 1,054,420, which may be taken as examples.

The constructions illustrated in these patents comprise essentially a tire-box having a wrapper and crown sheet with stay bolts between them, the stay bolts bei rig mounted so and the side walls of the crown-sheet members being provided with vertical slots to permit oi expansion and contraction, and prevent distortion of such members by reason oi the unequal heating of the central and side walls of such section members, the universal connections having their universal movable joint socket-portions located in slots formed in the abutting side walls.

5. A steam boiler fire boX construction, comprising a wrapper-sheet; a sectional crown sheet; stay bolt members movably connected at one endwith the wrapper-sheet by a ball and socket universal-joint, and at the other end with the sectional crown-sheet; the sections of the crown-sheet being of substantially lj-shape in cross-section and having the side walls thereoi' secured together; and the side walls of the crown-sheet members being provided with vertical slots to permit of expansion and contraction and prevent distortion of such member by reason 0]": the unequal heating of the central and side walls ol such section members, the universal connections connecting the staybolt members with the sectional crown-sheet members by their socket portions located in slots formed in the abutting side walls of the sectional crown-sheet members. i

6. A boiler fire-box construction com prising a wrapper-sheet; a crown-sheet composed of a plurality of sections having upstanding abutting side-flanges by which each of the sections is secured to the adjacent abutting sections; ball-joint spheriodally cavitied supporting journal members secured to the wrapper sheet; bracket or sidesecuring yoke-pieces secured to opposite sides of the upstanding flanges ot' the crownsheet sections securing them together; a spherically hollow ball-joint journal piece or seat member located within each pair of brackets and secured therein; and stay-bolt members securing the crown-sheet and the wrapper-sheet together, having a ball at either end fitting within the spherical-supports of the crown-sheet and in th said securing-yoke bracketnieinbers, whereby the Wrapper-sheet and crownsheet are secured and stayed together upon universal movably jointed bolts.

7. In a steamboiler fire-box construction, a wrapper-sheet; a ball-socket spherically cavitied stay-bolt securing journal member secured in such wrapper-sheet; a stay-bolt provided with a spheroidal ball at one end forming with the securing journaha universal ball-joint; a crown-sheet composed of a plurality of substantially ill-shaped members, the upstanding flanges of which are secured together and transversely securing bracket pieces or side-yokes having between them formed thereby a central cylindrical cavity provided with a female screw- .thread, such side-yokes being bolted tonesaeao gether upon the flanges oi" the U-shapcd sec: tions oi the crown-sheet; and a universal ball-socket ournal nece adapted to be .i L I I L screwed down into the cavity oithe twoyoke members upon a ball on the inner end oi a stay-bolt, which is secured, by a like ball at the other end in the securing ournal, carried by the wrapper-sheet.

8. In steam-boiler lire-box construction,

a wrapper-sheet; a ball-socket spherically civitied stay-bolt journal-member secured in such wrapp r-sheet; a stay-bolt provided with a spheroidal ball at one end located in the journal, so to form a universal balljoint, a crown-sheet composed of a plurality of substai ly U-shaped membe the upstanding flanges of wl ich are secur together, having transverse slots; securing bracket pieces or side-yokes having a central spherical cavity provided with a teale screw-thread bolted together upon the flanges of the ill-shaped sections of :1 1e crown-sheet; and a universal ball-socket journal-piece adapted to be screwed down into the cavity of the two yoke-members uponra ball formed upon the inner end of a stay-bolt.

9. In a steam-boiler lire-box construction, a wrapper-sheet; a ball-socket spherically cavitied stay-bolt journal-member secured in such wrapper-sheet; a stay-bolt provided with a spheroidal ball at one end located in the journal, so to form a universal balljoint; a crown-sheet composed of a plurality of substantially U-shaped membe the upstanding flanges of which are secured together, having transverse slots; securing bracket tones or side-yokes having a can. tral s1 rical cavity provided with a remale cw-thread bolted together upon the flanges of the U-shaped sections of the crown-sheet; and universal ball-socket journal-piece adapted to be screwed down into the cavity of the two yoke-members upon a ball formed upon the inner end of a stay-bolt, the ball being provided with an undercut central slot; and a securing pin passing transversely through the two yolzepieces lying in such undercut slot.

10. A steam-boiler fire-box consruction, comprising a wrapper-sheet; a crownsheet composer of longitudinal substantially U- shaped sections, spherical cavitied-ball journals carried by the wrapper-sheet; brackets or securing side yoke-pieces adapted to be secured to the side walls or flanges of the crown-sheet sections so as to secure the same together when arranged on oppo site sides of such side walls, so as to cover slots formed therein, so as to form by the coaction of such side yoke-pieces or brackets a cylindrical screw threaded sleeve; staymembers having a ball or cylindrical universal-joint portion at either end, the outer one of which is supported in a spherical support of the wrapper-sheet, and the lower like spherical ball of which is located in the screw-threaded central sleeve-portion formed between the two brackets, and is held in place by a male threaded hollow ball-receiv-- ing spheroidally cavitied journal-sleeve.

11. A steam-boiler fire-box construction comprising a wrapper-sheet; a crown-sheet composed of longitudinal substantially U shaped sections; spherically cavitied ball journal-supports carried by the wrappersheet; brackets or securing side yoke-pieces adapted to be secured to the side walls or flanges of the crown-sheet sections so as to secure the same together when arranged on opposite sides of such side walls or flanges, so as to' cover slots formed therein, so as to form by the coaction of such side-yoke pieces or brackets, a cylindrical screwthreaded sleeve; stay-members having a spheroidal universal-joint portion at either end, the outer one of which is'supported in a spherical cavitied journal supportof the wrapper-sheet, and having the lower like spherical ball located in the screw-threaded central sleeve portionformed between the side-yoke pieces or brackets, which lower ball is held in place by a male threaded hollow ball-receiving spheroidally cavitied journal-sleeve, the lower ball so held in place being provided with a central underout groove to receive a securing rivet-bolt lying in such slot passing through the sideyokes or bracket pieces.

12. A fire-box construction comprising a wrapper-sheet; a crown-sheet composed of a plurality of sections having upstanding flanges at their abutting joints; spherically cavitied ball-j ournal supports carriedby the wrapper-sheet; securing side yoke-pieces or brackets comprising ears carrying a half sleeve between them, saidbracket or. side yoke pieces being arranged on opposite sides of the upstanding flanges of the abutting crown-sheet sections, so that the semi-circular parts of the split-sleeves thereof together form a cylindrical chamber, the ears or end pieces of thes de-yokes or brackets being attached to the upstanding flanges; and stay members having a spherical portion at either end fitting within the said: cylindrical chamber at one. end and the cavitied ball-journal supports of the wrapper sheet at the other; whereby the wrapper-sheet and crown-sheet are universally movably mounted in relation to each other, for movable temperature expansive and contractive adjustment without. strain.

13. A fire-box construction comprising a a crown-sheet composed of having upstanding flanges at their abutting joints;' spherically cavitied ball-journal supports carried by the wrapper-sheet; side-yoke .or bracket pieces having a central semiscylindrical sleeve porwrapper-sheet plurality of moved portions.

attached to opposite sides of the uption,

flanges whereby they together form standing a sleeve provided with aninternal screw 'thread; a bushing having external screw threads sleeves spher1cal-port1on having a hollow cavitied located in the split-sleevev thus formed and stay-members or bolts hav ing' aspherical portion at either end, one end fitting within the spherical supports carried by the wrapper-sheet, and the other end held within the sleevesby thespherica'l cavitied portion of the male threaded bushing. 7. I 7

14. A'fire-box construction comprising a wrapper-sheet composed of aplurality of sections having connecting. side-securing flanges arranged at a right angle to the main central portion; a crown-sheet composed of a plurality of sections similarto the wrapper-sheet sections having the securing flanges of the crown-sheet and wrappersheet arranged parallel but staggered; spherical cavitied supports carried by the wrapper-sheet-between the flanges; spherically cavitied supports carried by the flanges or" the crown-sheet; and stay-members in the form of bolts each having a sphericalportion at either end fitting within. the said supports; wherebythe wrapper-sheet and crown-sheet are universally movably mounted in relation to each other. i r

15. A fire-box construction comprising a wrapper-sheet; and a crown-sheeticomposed of a plurality of sections having upstanding securing side flangesythesaid flanges having portions of metal-removed therefrom at a plurality of points at the outer portion,

and stay bolt vjournal securing members mountedin'the recesses formed by said removed portions for the-reception of'stay bolt journal securing members.

16, A fire-box construction comprising a wrapper-sheet; and acrown-sheet composed of a plurality of sections having upstanding securing side flanges the said flanges having portions of metal removed-therefrom-at a plurality of points at the outerjportion whereby the flanges have a diflerent' height at a plurality of points, and-stay bolt ournal securing members mounted in there cesses formed by said removed portions' 17., A fire-box constru'ctioncomprising' a wrappeirsheet, and a crown-sheet composed of a pluralityof substantially flat-bottomed U shaped sections, U shaped sections being provided with, a slots made in the upper edges thereof, whereby the said vertical legs have a different height at a plurality of points, and stay bolt journal securing members mounted in the recesses formed bysaid re-' 18. A boiler firebox construction comprising a wrapper-sheet; a sectional crownsheet composed of a plurality of-substanthe vertical legs of the.

tially U shaped sections; the adjacent abutting securing flanges of such sections hav ing a stay sheet interposed between them; securing rivets passingthrough such side flanges and interposed stay-sheet; side-yoke or bracket-members attached to the members of the crown-sheet section; and stay bolts or members connected by a universal joint at one end to the flanges of the crownsheet; and at the other end in a like manner to the wrapper-sheet.

19. A boiler-firebox construction comp ising a sectional crown-sheet composed of a plurality of substantially Ushaped sections, the adjacent abutting securing flangesor side walls oflwhich' abutting sections have a stay-sheet interposed between; a sectional crown-sheet formed of like shaped sections; securing rivets passing through such side flanges and interposed stay-sheet of the sectional wrapper-sheet and sectional crown-sheet; side-yoke or brachet-men'ibers attached to the flan es of the crown-sheet sections; and stay-bolts or members connected by a universal joint at one end to each of the side yolces or" the bracket mem bers attached to the crownsheet section flanges; and attached at the other end in a. like manner by universal-joints to the wrapper-sheet.

20. A boiler flre-box construction comprised of a plurality of substantially fla bottomed U shaped sections, which when secured together at the flanged or leg portions, constitute a sectionally formed crown-sheet and sidewall member of the fire-box; the substantially horizontal crown-sheet portion, and the side-wall portion being each provided with expansion slots in the flange and with universal-joint caviticd bracketpieces secured thereto forming ball-joun nal sockets; in each of which is universally mounted the ball of stay-bolt extending outward from-the crown-sheet or the side furnace-wall, and secured to the wrappersheet by a like universal stay-bolt joint.

21. In combination, a wrapper-sheet comprising channel members having inwardly turned flanges abutting the flanges of the adjacent sections; a crown-sheet comprising channel sections having outwardly turned side flanges abutting the flanges of the adjacent crown-sheet sections and staggered 'with the flanges of the wrapper-sheet sections; and stay bolts having universal connection with sald outturned flanges and the 1ntramarg1nal portion of the wrapper sheet sections.

22. In combination, wrapper-sheet sectlons comprlsing channel members having inwardly turned flanges abutting the flanges of the wrapper sheet sections.

23. In combination, a wrapper sheet; crown-sheet sections havin outturned flanges secured to-thc flanges or the adjacent sections, and provided with registering cut out portions at the edges, and with slots extending to near the yoke portion of the section and communicating with said cutout portion; and stay bolts having connection with said outturned flanges and the wrapper sheet.

2%, In combination, a wrapper sheet; a crown-sheet comprising sections having out turned flanges secured to the flanges of the adjacent sections, and provided with registering transverse slots extending to near the yoke portion of the section; and stay bolts having connection with said outturnet flanges and the wrapper-sheet.

A crown-sheet comprising sections having outturned flanges secured the flanges oi the adjacent sections, and provided with transverse registering slets er;- tending to near the yoke portion of the section.

26. In combination, a wrapper-sheet; crown-sheet channel sections having outwardly turned side flanges secured to the flanges of the adjacent crown-sheet sections and provided with registering rectangular cut-out portions at the edges; a socket seated in each cut-out portion; and stay bolts having universal connection with said wrap aer, sheet and said sockets.

27. In combination, a wrapper-sheet; crown-sheet channel sections having side flanges abutting the flanges of the adjacent sections and provided with registering cutout portions; a socket seated in each cut-out portion; and stay bolts having connection with said Wrapper-sheet and said sockets.

28. In combination, spaced sheets, one of which comprises channel sections having side flanges abutting the flanges of the adjacent sections and provided with registering rectangular cut-out portions; and stay bolts having connection with said sheets and one end seated in said cut out portion.

29. In combination, spaced sheets, one of which comprises channel sections having side flanges provided with cut out portions; and stay bolts having connection with said sheets and one end in said out out portion.

30. In combination, a wrapper sheet; crown -sheet sections having outturned flanges secured to the flanges of the adjacent se-itions, and provided with registering cut out portions at the edges; a pair of bracket members secured at their opposite ends to the side face of adjacent flanges at said cutaway portions and provided with opposed cavities together forming a threaded sleeve; a threaded bushing in said sleeve and cutaway portion and provided with a spherical interior socket surface: a transverse pin diametrical to the lower part of said sleeve and holding the bracket members from spreading apart; and a plurality of stay bolts, each having universal connection at its outer end With the Wrapper sheet and a substantially spherical inner end received by said socket surface and provided with. a transverse end groove receiving said pin.

Si. in combination a pair of sheets one oi which comprises sections having flanges secured to the flanges of the adjacent sections, and provided With registering cut-out portions at-the edges; bracket members se crown-sheet; a plurality o1 stay bolts con-c nected to the crown-sheet and each having a threaded outer end; exteriorly threaded socket sleeves having spherical sockets in their outer ends and having reduced threaded inner ends received in said intra-marginal openings; ball shaped nuts received on the outer ends of said stay bolts and seated in said sockets; and interiorly threaded caps adjacent sections; a crown-sheet;

mounted on the outer ends of said Socket 7 sleeves and covering said nuts.

33.1n combination, Wrapper-sheet sections comprising channel members having intra marginal openings and inwardly turned flanges secured. to the flanges of the a P rality of stay bolts connected to the crownsheet and each having a threaded outer end;

socket sleeves having spherical sockets in their outer ends and having reduced ends received in said intramarginal openings respectively; and ba1l-shaped nuts received on the outer ends of said stay bolts and seated in said sockets. I

34;. In'combination a Wrapper-sheet comprising sections having inturned flanges se-" cured to the flanges of the adjacent sections; crown-sheet channel sections having outwardly turned side flanges abutting the flanges of the adjacent crown-sheet sections; stay bolts having universal connection With said outturned flanges and the intra-marginal'portion of the Wrapper-sheet sections;

and rivets passing through adjacent flanges of the crown-sheet sections between the uni versal connection and the body portion of the section and holding the flanges in steamtight contact throughout. V CHARLES DUCAS. Witnesses:

H. A. PATTISON; H. D. PENNEY.

R. N. EHRHART.

CONDENSER. APPLICATION FILED NOV- H. 19!- ZL 35 6QLQ Patented Sept. 21, 1929.,

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