US574107A - Joseph nodder - Google Patents

Joseph nodder Download PDF

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US574107A
US574107A US574107DA US574107A US 574107 A US574107 A US 574107A US 574107D A US574107D A US 574107DA US 574107 A US574107 A US 574107A
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furnace
ribs
flue
portions
nodder
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal
    • F16L9/06—Corrugated pipes

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  • the plates of which the said boiler furnacesV or iiues are made are of unequal thickness, the thicker portions being constituted by hollow ribs arrangedtransversely to the axis of the furnace or flue, the con cavity being on the fire side of the furnace or flue and the conveXity on the water side, the tops of the said ribs being thicker than the other portions of the plate.
  • the ribs thus formed arched parts or portions are made with a sweeping curve, the convexity thereof being on the water side and the concavity on the fire side, these curved parts preferably joining the ribs aforesaid by reversely-curved portions.
  • A are the aforesaid thickened hollow ribs arranged transversely to the axis of the furnace or flue. These have a concavity on the fire side at a, the top or convexity a2 being on the water side of the furnace or flue.
  • .B are the arched parts or portions between the ribs A, these said arched parts or portions being made with a sweeping curve, with the concavity b on the fire side and the convexity b2 on the water side of the furnace or flue, the said parts B joining the ribs A by reversely-curved portions, as at c.
  • furnace-fines having no provision for longitudinal movement caused by expansion and contraction during work are particularly liable to circumferential splits at the base of the rib, while iues of the corrugated and suspension arch type elongate too easily, and when compelled to contract by the cooling of the boiler do not retain their circularity, but are' forced inward and partially collapsed.
  • the circularity of the iiue is maintained by the thickened ribs or bands, while the arches and curved parts at the end of the arched parts provide sufficient flexibility for contraction and elongation, so that even with increased strength against collapse I avoid the longitudinal rigidity of flues having no provision for longitudinal movement caused by expansion and contraction during work and the longitudinal weakness of the corrugated and suspension arch flues without further encroachment on the water-space of the boiler, the space inclosed between two parallel lines from fire to water being less than in any other furnace-iiue of this class known to me.
  • a boiler furnace or iiue having thickened hollow ribs, arched portions between the ribs, the convexities of said parts being on the water side of the flue and the concavities thereof on the fire side of the flue, curved portions intermediate of and connecting the arched portions to the ribs, substantially as described.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Description

UNITED STATES ATENT OFFICE.
.IOSEPII NODDER, OF SHEFFIELD, ENGLAND, ASSIGNOR TO THE JOI-IN BROWN t COMPANY, LIMITED, OF SAME PLACE.
STEAM-BOILER FURNACE AND FLUE.
SPECIFICATION forming part of Letters Patent No. 574,107, dated December 29, 1896.
Application led August 20, 1896.` Serial No. 803,400. (No model.)
The plates of which the said boiler furnacesV or iiues are made are of unequal thickness, the thicker portions being constituted by hollow ribs arrangedtransversely to the axis of the furnace or flue, the con cavity being on the fire side of the furnace or flue and the conveXity on the water side, the tops of the said ribs being thicker than the other portions of the plate. Between the ribs thus formed arched parts or portions are made with a sweeping curve, the convexity thereof being on the water side and the concavity on the fire side, these curved parts preferably joining the ribs aforesaid by reversely-curved portions.
The accompanying drawing represents in longit-udinal section a portion of a boiler furnace or iue sufficient to illustrate this invention.
A are the aforesaid thickened hollow ribs arranged transversely to the axis of the furnace or flue. These have a concavity on the fire side at a, the top or convexity a2 being on the water side of the furnace or flue.
.B are the arched parts or portions between the ribs A, these said arched parts or portions being made with a sweeping curve, with the concavity b on the fire side and the convexity b2 on the water side of the furnace or flue, the said parts B joining the ribs A by reversely-curved portions, as at c.
It has been practically demonstrated that furnace-fines having no provision for longitudinal movement caused by expansion and contraction during work are particularly liable to circumferential splits at the base of the rib, while iues of the corrugated and suspension arch type elongate too easily, and when compelled to contract by the cooling of the boiler do not retain their circularity, but are' forced inward and partially collapsed.
Vith the form of flue constituting the present invention the circularity of the iiue is maintained by the thickened ribs or bands, while the arches and curved parts at the end of the arched parts provide sufficient flexibility for contraction and elongation, so that even with increased strength against collapse I avoid the longitudinal rigidity of flues having no provision for longitudinal movement caused by expansion and contraction during work and the longitudinal weakness of the corrugated and suspension arch flues without further encroachment on the water-space of the boiler, the space inclosed between two parallel lines from fire to water being less than in any other furnace-iiue of this class known to me.
My furnace-flue has been demonstrated to 'thereof on the iire side of the iiue, substantially as described.
2. A boiler furnace or iiue having thickened hollow ribs, arched portions between the ribs, the convexities of said parts being on the water side of the flue and the concavities thereof on the fire side of the flue, curved portions intermediate of and connecting the arched portions to the ribs, substantially as described.
In testimony whereof I have signed my name to this speciiication in the presence of two subscribing witnesses.
JOSEPH NODDER. Witnesses:
OHAs. MAXEY, J. E. ToWNsEND.
US574107D Joseph nodder Expired - Lifetime US574107A (en)

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