US2053234A - Skelp retort - Google Patents

Skelp retort Download PDF

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US2053234A
US2053234A US20388A US2038835A US2053234A US 2053234 A US2053234 A US 2053234A US 20388 A US20388 A US 20388A US 2038835 A US2038835 A US 2038835A US 2053234 A US2053234 A US 2053234A
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skelp
retort
sections
heating
edge
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US20388A
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James L Anderson
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Airco Inc
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Air Reduction Co Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08Making tubes with welded or soldered seams
    • B21C37/083Supply, or operations combined with supply, of strip material

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  • This invention relates to retorts for heating skelp in the manufacture of welded pipe or tubme.
  • the improved retort is intended especially for guiding, protecting, and heating the edges of flat skelp as it is drawn from a preheating furnace to a closing die or bell by a drawbench, in the manner disclosed in'my Patent. No. 2,040,164, dated May 12, 1936.
  • Another object of the invention is to provide a retort which can be quickly and conveniently opened for immediate removal of any skelp which breaks or for any other reason stops in front of thetorches or other heating means of the retort.
  • the heat used in the retort is of such intensity that the edges of any skelp which stops in the retort will melt and run into the grooves and over 3 the guiding surfaces of the retort unless the skelp can .be immediately removed from the retort.
  • Another object of the invention is to provide a retort of the character indicated which is of simple and rugged construction and inexpensive to manufacture.
  • Fig. 1 is a diagrammatic side elevation showin the retort of this invention in its relation to a skelp heating furnace and draw-bench for making pipe or tubing;
  • Fig. 2 is an enlarged top plan view of the retort, partly broken away and partly in section;
  • Fig. 3 is an end elevation of the retort shown in Fig. 2, on a reduced scale
  • Fig. 4 is a sectional view on the line l-4 of Fig. 2, with the retort open;
  • Fig. 5 is an enlarged view of the right-hand half of the structure shown in Fig. 3; v
  • Fig. 6 is a side elevation of the structure shown in Fi 3: i
  • Fig. '7 is a fragmentary sectional view on the line 1-1 of Figs. 5 and 8;
  • Fig. 8 is a sectional view along the line 88 of Fig. '1;
  • Fig. 9 is a sectional view on the line 3-4 of Fig. 8.
  • Fig. 1 shows a retort l0 located in front of the discharge opening of a skelp heating furnace ,l l.
  • a closing die or bell I2 is held in the head-block of a draw-bench l4, and the retort is supported by a base I5 extending from the draw-bench.
  • the retort comprises left and right-hand retort bodies 2
  • Long burner blocks 24 in the retorts direct flames against the edges of the skelp, the heating effect of the burners being so proportioned to the lineal speed of the skelp and to the temperature of withdrawal from the furnace that the retort flames prepare the edges to weld together when they are brought together in the closing die or bell l2.
  • Each of the retort bodies has a lower section 26 which has agrooved surface 21 for supporting the edge of the skelp.
  • the surface 21 has grooves 28 in line with the jet orifices 30 of the torch. blocks 24.
  • the products of combustion from the torch flames pass out through the grooves 28 in contact with the surface of the skelp and heat 20 the metal back from the edge faces to reduce heat lost from the edge faces by conduction.
  • the envelope gases which are strongly reducing, scavenge: the skelp metal of oxid by chemical action in addition to heating the metal back from the edge faces.
  • Each of the retort bodies has an upper section 33 with a guide surface 34 overlapping the upper face of the skelp.
  • This guide surface 34 is spaced from the surface 21 of the lower section 26 by a distance somewhat greater than the thickness of the skelp, but it serves to smooth out any undulations in the skelp and confines the products of combustion close to the upper face of the skelp.
  • Each torch block 24 is held in position in the chamber between the lower and upper sections of the retort body by screws 36 extending through slotted ears 31 of the torch blocks and threading into bosses 38 (Fig. 4) of the lower section 26.
  • the slots in the ears 31 permit the torch block 24 to be adjusted with respect tothe edge faces of the skelp to obtain the most advantageous heating of the metal.
  • the bosses 38 hold the torch block spaced from the lower section 26 to grovligde a passage for air to enter under the torch loc Referring again to Figs. 2 and 3, the skelp is guided laterally by quadrants 39, which are connected to the ends of the upper sections 33 by screws 40.
  • quadrants have curved guide surfaces ll which form a flaring entrance for the retort into which the end of the skelp is pulled by the tongs.
  • a flaring exit at the delivery end of the retort is similar to the entrance so that the skelp can bend upward or downward as it leaves the retort when the closing die or bell is not accurately alined with the retort and in order to make parts of the retort reversible and interchangeable.
  • the lower sections 26 are clamped to a retort 60 casting 42 by screws 43 (Fig. 2) which extendthrough slots so that the retort bodies can be moved closer together or further apart to accombolts 45. bolted to the base I which extends from the draw-bench.
  • the retort sections 26 and 33 have cooling passages 48, best shown in Fig. 4, through which water is circulated to prevent the surfaces 21 and 34 from becoming overheated.
  • Fig. 2 shows water inlet and outlet connections 49 and 50 for the lower section 26, and similar connections 5
  • the quadrants 39 can be operated, by mechanism which will be described, to raise the upper section 33 and move it back into the position shown in Fig. 4, where it no longer overlaps the edges of the skelp.
  • This opening of the retort makes it possible for an attendant to remove quickly the remainder of a piece of skelp which breaks or from which the tongs pull off. Such an accident is likely to occur when an attendant carelessly permits the skelp to become so highly heated in the furnace that it loses most of its strength and can not stand the force required to pull it through the closing die or bell.
  • the lower sections 26 have downwardly extending end portions 54 (Figs. 7 and 8), each of which has supporting surfaces 55 and 56 on which the quadrant 39 is supported when the retort is closed.
  • Fig. 7 shows the manner in which the upper end of the quadrant 39 overlies the surface 55.
  • a shoulder 51 (Fig. 8) between the adjacent ends of the surfaces 55 and 56 serves as an abutment for a shoulder 58 between the complementary surfaces of the quadrant 39 and prevents the retort from opening unless the upper section 33 and its supporting quadrants 39 are raised enough to clear the shoulders 51 of the end portions of the lower section 26.
  • Additional means for holding the retort closed include a latch 60 which extends upward through a channel 6
  • the upper end of the latch 60 is wider than the part below and extends into a recess atthe upper end of the channel 6i.
  • the extending portion of the latch strikes against the bottom face 64 of the recess to limit the downward movement of the latch.
  • a shaft 66 extends through a hub near the lower part of the end portion 54.
  • a lever 61 fulcrumed on the shaft 66 is connected to the bifurcated lower end of the latch 60 by a pin 68.
  • the quadrant 39 is connected with the lever 61 by a pin 10.
  • the shaft 66 extends through a slot II (Fig. 5) in the lower end of the-quadrant 39.; l
  • the levers'61 at both ends of theretort' body 22 are operated by a common pull link 13, best shown iii-Fig. 6.
  • This link has reduced ends extending intothe levers 61, and is connected at its lower end to a link 15 by a pin, 16.
  • the lower end of the link 15 has. a pivot connection with an operating. handle ll.
  • the handle TI is secured to a shaft is which turns in hubs 19 of the retort casting 42.
  • the shaft 18 extends to the other side of the retort, as shown in Fig. 3, and a handle 80 is secured to the left end of the shaft 18.
  • This handle 80 is connected with the link mechanism for opening the retort body 2
  • the connection of the handles 11 and 80 by the shaft 18 enables an attendant to open or close both of the retort bodies 2
  • the lever 61 is rocked clockwise about the axis of the shaft 66 to pull down the latch 60 and raise the pin and with it the quadrant 39 and upper section 33.
  • the open part of the slot H is below the shaft 66 so that the quadrant 39 can rise with the pin 10 sufficiently to clear the shoulder 51.
  • the height of this shoulder determines the length of the slot II.
  • the retort is closed again by rocking the lever 61 counterclockwise so that pin 10 moves the quadrant 39 and upper section 33 toward closed position.
  • the quadrant 39 is not supported by the shaft 66 when open, but is supported during its closing movement by the surface 56 which is cylindrical about the shaft 66 as a center.
  • the quadrant 39 drops into its closed position shown in Figs. 5 and 8.
  • Pipe or tube welding apparatus including a retort comprising right and left retort bodies through which the edges of the skelp are moved, said bodies being spaced transversely of the direction of movement of the skelp to permit the passage of tongs, and each of said bodies having a lower section which extends under the skelp for a distance back from the edge to support the skelp, and an upper section covering the top surface of the skelp adjacent the edge, means in the retort for heating the edge faces of the skelp as it passes through the retort bodies, and pivot connections on which the upper sections are movable with respect to the lower sections to uncover the edge portions? of the skelp so that said skelp can be lifted out of the retort without obstruction.
  • Apparatus for heating the edges of skelp comprising a retort body for each edge of the skelp, each retort body including upper and lower sections having spaced surfaces, above and below the skelp, for guiding the edge portions of the skelp as they travel through said retort bodies, and torch means within the retort for strongly heating the edge face of the skelp as it travels between said guide surfaces, and pivot connections on which the upper sections rock withrespect to the lower sections into positions exposing the upper surface of the skelp across its entire width and when there is no skelp in the retort affording access to the torch means and lower guide surfaces for cleaning.
  • a heating retort including lower sections having surfaces adapted to support the edge portions of a skelp as it moves through the retort, and upper sections spaced transversely of the direction of movement of the skelp and having surfaces extending over said edge portionsof the skelp, means in the retort for strongly heating the edge faces of the skelp as it travels through the retort between said surfaces of the upper and lower sections, and pivot connections on which the upper sections are movable to uncover the skelp supporting surface of 'the lower section.
  • a heating retort including lower sections having surfaces adapted to support the edge portions of a skelp as it moves through the retort, the supporting surfaces terminating short of the midportion of the skelp and having grooves for guiding hot gas across the under surface of the skelp and into the space between said lower sections, and upper sections having surfaces above the supporting surfaces of the lower sections and in position to smooth out waves in the skelp and to serve as guides for hot gases flowing across the top surface of the edge portions of the skelp,-
  • upper sections spaced transversely of the direction of movement of the skelp and having guide surfaces covering the top surface of the skelp adjacent the edges, lower sections extending under the skelp, and means for shifting said upper sections with respect to the lower sections and the skelp to expose the top surface of the skelp across its entire width.
  • a heating retort through which skelp is moved to heat the edges, upper sections having surfaces covering the top surface of the skelp adjacent the edges, abutments for holding the upper sections in such relation to the skelp, and means for moving the upper sections to uncover the full width of the skelp, said means including common operating mechanism for successively moving the upper sections in a direction to clear the abutments and then transversely of the skelp.
  • a skelp heating retort including retort bodies for each edge of the skelp, each of said bodies including a fixed lower section having a surface for supporting the edge portion of the skelp, a movable upper section having quadrants at its opposite ends and pivot connections between the quadrants and the fixed sections, means for retaining the movable section in a position covering the upper surface of the skelp for a distance back from the edge, and means for releasing the movable section from the retaining means and for shifting it into a position to uncover the skelp.
  • Skelp heating apparatus comprising retort bodies in which the edge faces of the skelp are heated, said bodies including means for supporting the skelp and movable upper sections adapted to overlie the top surface of the skelp adjacent the edges, latches for holding the movable sections in position overlying the edges of the skelp, and means for releasing the latches and moving the upper sections back from theskelp to expose the full width of said skelp.
  • Apparatus for heating the edges of a skelp comprising a retort'body extending along each side edge of the skelp, each retort body including a fixed lower section having a supporting surface over which the skelp travels, a movable upper section with a surface spaced from but covering the top face of the skelp for a distance back from the edge of the skelp when the retort is closed, a torch located between the upper and lower sections of the retort body in position to direct a system of flame against the edge face of the skelp, means holding the torch in place with passages above and below the torchfor the admission of air to burn envelope gas from the flame system of the torch, transversely extending grooves in the skelp supporting surface for confining and guiding some of the products of combustion across the bottom face of the skelp, and means for moving the upper section transversely to open the retort bow and expose the grooves in the lower section and at
  • a retort body comprising a longitudinally extending fixed lower section having a surface for supporting the edge portion of a skelp' as it v travels through the retort body, a movable upper section overlying the lower section and having a surface substantially parallel to the supporting surface of the lower section and spaced from said supporting surface to permit the skelp to pass freely between said surfaces when the retort body is closed, quadrants connected to the ends of'the upper section, pivot connections between the quadrants and a fixed part of the retort body, means to hold the upper section and quadrants in their closed positions, and mechanism for releasing the movable parts of the retort bodyfrom the holding means so that the quadrants rockv on their pivot connections and .shift the upper section transversely of the skelp to open the retort body.

Description

SKELP RETORT 1955 4' Sheets-Sheet l J. L. ANDERSON Filed May 8,
, 1 2177)!771777? Mari:
Sept. 1. 1936.
Sept. 1, 1936'. J, ANDERSON 2,053,234
SKELP RETORT Filed May 8,- 1955 4 Sheets-Sheet 5 ATTORNEY SKELP RETORT Filed May 8, 1935 4 Sheets-Sheet 4 ATTORNEY Patented Sept. 1, 1936 UNITED STATES PATENT OFFICE 2,153,234 SKELP BETOBT Application May 8, 1935, Serial No. 20,388
11 Claims.
This invention relates to retorts for heating skelp in the manufacture of welded pipe or tubme.
It is an object of the invention to provide an improved retort in which to heat the edges of the skelp to a condition for welding in a bell or other closing means. The improved retort is intended especially for guiding, protecting, and heating the edges of flat skelp as it is drawn from a preheating furnace to a closing die or bell by a drawbench, in the manner disclosed in'my Patent. No. 2,040,164, dated May 12, 1936.
Another object of the invention is to provide a retort which can be quickly and conveniently opened for immediate removal of any skelp which breaks or for any other reason stops in front of thetorches or other heating means of the retort. The heat used in the retort is of such intensity that the edges of any skelp which stops in the retort will melt and run into the grooves and over 3 the guiding surfaces of the retort unless the skelp can .be immediately removed from the retort. Another object of the invention is to provide a retort of the character indicated which is of simple and rugged construction and inexpensive to manufacture. v
Other objects, features and advantages of the invention will appear or be pointed out as the specification proceeds.
In the accompanying hereof:
Fig. 1 is a diagrammatic side elevation showin the retort of this invention in its relation to a skelp heating furnace and draw-bench for making pipe or tubing;
Fig. 2 is an enlarged top plan view of the retort, partly broken away and partly in section;
Fig. 3 is an end elevation of the retort shown in Fig. 2, on a reduced scale; Fig. 4 is a sectional view on the line l-4 of Fig. 2, with the retort open;
Fig. 5 is an enlarged view of the right-hand half of the structure shown in Fig. 3; v
. Fig. 6 is a side elevation of the structure shown in Fi 3: i
Fig. '7 is a fragmentary sectional view on the line 1-1 of Figs. 5 and 8;
Fig. 8 is a sectional view along the line 88 of Fig. '1; and
Fig. 9 is a sectional view on the line 3-4 of Fig. 8.
Fig. 1 shows a retort l0 located in front of the discharge opening of a skelp heating furnace ,l l. A closing die or bell I2 is held in the head-block of a draw-bench l4, and the retort is supported by a base I5 extending from the draw-bench.
30 drawings, forming part Skelp l6 heated in the furnace II is drawn through the retort llland bell I! by tongs ll, whichconnect with a dog I! on a draw-bench chain it which is moved through suitable sprockets and gearing by a motor 20. I
Referring to Figs. 2 and 3, the retort comprises left and right-hand retort bodies 2| and '22, through which the edges of the skelp l6 are 5 drawn. Long burner blocks 24 in the retorts direct flames against the edges of the skelp, the heating effect of the burners being so proportioned to the lineal speed of the skelp and to the temperature of withdrawal from the furnace that the retort flames prepare the edges to weld together when they are brought together in the closing die or bell l2.
Each of the retort bodies has a lower section 26 which has agrooved surface 21 for supporting the edge of the skelp. The surface 21 has grooves 28 in line with the jet orifices 30 of the torch. blocks 24. The products of combustion from the torch flames pass out through the grooves 28 in contact with the surface of the skelp and heat 20 the metal back from the edge faces to reduce heat lost from the edge faces by conduction. With oxyacetylene flames, the envelope gases, which are strongly reducing, scavenge: the skelp metal of oxid by chemical action in addition to heating the metal back from the edge faces.
Each of the retort bodies has an upper section 33 with a guide surface 34 overlapping the upper face of the skelp. This guide surface 34 is spaced from the surface 21 of the lower section 26 by a distance somewhat greater than the thickness of the skelp, but it serves to smooth out any undulations in the skelp and confines the products of combustion close to the upper face of the skelp.
Each torch block 24 is held in position in the chamber between the lower and upper sections of the retort body by screws 36 extending through slotted ears 31 of the torch blocks and threading into bosses 38 (Fig. 4) of the lower section 26. The slots in the ears 31 permit the torch block 24 to be adjusted with respect tothe edge faces of the skelp to obtain the most advantageous heating of the metal. The bosses 38 hold the torch block spaced from the lower section 26 to grovligde a passage for air to enter under the torch loc Referring again to Figs. 2 and 3, the skelp is guided laterally by quadrants 39, which are connected to the ends of the upper sections 33 by screws 40. These quadrants have curved guide surfaces ll which form a flaring entrance for the retort into which the end of the skelp is pulled by the tongs. A flaring exit at the delivery end of the retort is similar to the entrance so that the skelp can bend upward or downward as it leaves the retort when the closing die or bell is not accurately alined with the retort and in order to make parts of the retort reversible and interchangeable.
The lower sections 26 are clamped to a retort 60 casting 42 by screws 43 (Fig. 2) which extendthrough slots so that the retort bodies can be moved closer together or further apart to accombolts 45. bolted to the base I which extends from the draw-bench.
The retort sections 26 and 33 have cooling passages 48, best shown in Fig. 4, through which water is circulated to prevent the surfaces 21 and 34 from becoming overheated. Fig. 2 shows water inlet and outlet connections 49 and 50 for the lower section 26, and similar connections 5| and 52 for the upper section 33. These water conneov tions are omitted from the other view for greater clearness.
The quadrants 39 can be operated, by mechanism which will be described, to raise the upper section 33 and move it back into the position shown in Fig. 4, where it no longer overlaps the edges of the skelp. This opening of the retort makes it possible for an attendant to remove quickly the remainder of a piece of skelp which breaks or from which the tongs pull off. Such an accident is likely to occur when an attendant carelessly permits the skelp to become so highly heated in the furnace that it loses most of its strength and can not stand the force required to pull it through the closing die or bell.
In case of any accident which causes the skelp to stop in the retort, it is important to remove it quickly, because the flames from the torch blocks will melt any skelp which stops moving and cause molten metal to flow into the retort. If this occurs, operations must be held up for a considerable period while the metal is removed from the retort. There is some accumulation of dirt and slag on the faces of the torch blocks,
retort and torch block conveniently and thor-- oughly in a very short time.
The lower sections 26 have downwardly extending end portions 54 (Figs. 7 and 8), each of which has supporting surfaces 55 and 56 on which the quadrant 39 is supported when the retort is closed. Fig. 7 shows the manner in which the upper end of the quadrant 39 overlies the surface 55. A shoulder 51 (Fig. 8) between the adjacent ends of the surfaces 55 and 56 serves as an abutment for a shoulder 58 between the complementary surfaces of the quadrant 39 and prevents the retort from opening unless the upper section 33 and its supporting quadrants 39 are raised enough to clear the shoulders 51 of the end portions of the lower section 26.
Additional means for holding the retort closed include a latch 60 which extends upward through a channel 6| in the end of the lower section 26 and into a recess 62 in the quadrant 39. The upper end of the latch 60 is wider than the part below and extends into a recess atthe upper end of the channel 6i. The extending portion of the latch strikes against the bottom face 64 of the recess to limit the downward movement of the latch.
A shaft 66 extends through a hub near the lower part of the end portion 54. A lever 61 fulcrumed on the shaft 66 is connected to the bifurcated lower end of the latch 60 by a pin 68. The quadrant 39 is connected with the lever 61 by a pin 10. The shaft 66 extends through a slot II (Fig. 5) in the lower end of the-quadrant 39.; l
The levers'61 at both ends of theretort' body 22 are operated by a common pull link 13, best shown iii-Fig. 6. This link has reduced ends extending intothe levers 61, and is connected at its lower end to a link 15 by a pin, 16. The lower end of the link 15 has. a pivot connection with an operating. handle ll. The handle TI is secured to a shaft is which turns in hubs 19 of the retort casting 42. The shaft 18 extends to the other side of the retort, as shown in Fig. 3, and a handle 80 is secured to the left end of the shaft 18. This handle 80 is connected with the link mechanism for opening the retort body 2|. The connection of the handles 11 and 80 by the shaft 18 enables an attendant to open or close both of the retort bodies 2| and 22 simultaneously by operating either of the handles 11 and 80'.
The operation of the lever 61 to open the retort body 22 is as follows:
The lever 61 is rocked clockwise about the axis of the shaft 66 to pull down the latch 60 and raise the pin and with it the quadrant 39 and upper section 33. When the retort is closed, as shown in Fig. 5, the open part of the slot H is below the shaft 66 so that the quadrant 39 can rise with the pin 10 sufficiently to clear the shoulder 51. The height of this shoulder determines the length of the slot II. I
When thequadrant rises until the lower end of the slot 1| comes into contact with the shaft 66, further upward movement of the pin 10 causes the quadrant 39 to rock clockwise on the shaft 66 as a fulcrum, into the open position shownln Fig. 4.
The retort is closed again by rocking the lever 61 counterclockwise so that pin 10 moves the quadrant 39 and upper section 33 toward closed position. The quadrant 39 is not supported by the shaft 66 when open, but is supported during its closing movement by the surface 56 which is cylindrical about the shaft 66 as a center. When the shoulder 58 comes into line with the shoulder 51, the quadrant 39 drops into its closed position shown in Figs. 5 and 8. I
The preferred embodiment of the invention has been described, but changes and modifications can be made, and some features of the invention can be used alone without departing from the invention as defined in the claims.
I claim:
' 1. Pipe or tube welding apparatus including a retort comprising right and left retort bodies through which the edges of the skelp are moved, said bodies being spaced transversely of the direction of movement of the skelp to permit the passage of tongs, and each of said bodies having a lower section which extends under the skelp for a distance back from the edge to support the skelp, and an upper section covering the top surface of the skelp adjacent the edge, means in the retort for heating the edge faces of the skelp as it passes through the retort bodies, and pivot connections on which the upper sections are movable with respect to the lower sections to uncover the edge portions? of the skelp so that said skelp can be lifted out of the retort without obstruction.
2. Apparatus for heating the edges of skelp comprising a retort body for each edge of the skelp, each retort body including upper and lower sections having spaced surfaces, above and below the skelp, for guiding the edge portions of the skelp as they travel through said retort bodies, and torch means within the retort for strongly heating the edge face of the skelp as it travels between said guide surfaces, and pivot connections on which the upper sections rock withrespect to the lower sections into positions exposing the upper surface of the skelp across its entire width and when there is no skelp in the retort affording access to the torch means and lower guide surfaces for cleaning.
3. A heating retort including lower sections having surfaces adapted to support the edge portions of a skelp as it moves through the retort, and upper sections spaced transversely of the direction of movement of the skelp and having surfaces extending over said edge portionsof the skelp, means in the retort for strongly heating the edge faces of the skelp as it travels through the retort between said surfaces of the upper and lower sections, and pivot connections on which the upper sections are movable to uncover the skelp supporting surface of 'the lower section.
4. A heating retort including lower sections having surfaces adapted to support the edge portions of a skelp as it moves through the retort, the supporting surfaces terminating short of the midportion of the skelp and having grooves for guiding hot gas across the under surface of the skelp and into the space between said lower sections, and upper sections having surfaces above the supporting surfaces of the lower sections and in position to smooth out waves in the skelp and to serve as guides for hot gases flowing across the top surface of the edge portions of the skelp,-
torches in the retort on opposite sides of the skelp and in position to direct systems of flame against the edge faces of the skelp, and to direct the products of combustion inward through the grooves in the surfaces of the lower sections and through the space between the skelp and the surfaces of the upper retort sections, and pivot connections on which the upper sections are movable to uncover the grooves of the lower sections and provide access to the torches for cleaning said grooves and torches when there is no skelp in the retort.
5. In a heating retort through which skelp is moved to heat the edges, upper sections spaced transversely of the direction of movement of the skelp and having guide surfaces covering the top surface of the skelp adjacent the edges, lower sections extending under the skelp, and means for shifting said upper sections with respect to the lower sections and the skelp to expose the top surface of the skelp across its entire width.
6. In a heating retort through which kelp is moved to heat the edges, upper sections having surfaces covering the top surface of the skelp adjacent the edges, abutments for holding the upper sections in such relation to the skelp, and means for moving the upper sections in a direction to clear the abutments and then moving said sections transversely of the skelp to uncover the upper surface of the skelp.
7. In a heating retort through which skelp is moved to heat the edges, upper sections having surfaces covering the top surface of the skelp adjacent the edges, abutments for holding the upper sections in such relation to the skelp, and means for moving the upper sections to uncover the full width of the skelp, said means including common operating mechanism for successively moving the upper sections in a direction to clear the abutments and then transversely of the skelp.
8. A skelp heating retort including retort bodies for each edge of the skelp, each of said bodies including a fixed lower section having a surface for supporting the edge portion of the skelp, a movable upper section having quadrants at its opposite ends and pivot connections between the quadrants and the fixed sections, means for retaining the movable section in a position covering the upper surface of the skelp for a distance back from the edge, and means for releasing the movable section from the retaining means and for shifting it into a position to uncover the skelp.
9. Skelp heating apparatus comprising retort bodies in which the edge faces of the skelp are heated, said bodies including means for supporting the skelp and movable upper sections adapted to overlie the top surface of the skelp adjacent the edges, latches for holding the movable sections in position overlying the edges of the skelp, and means for releasing the latches and moving the upper sections back from theskelp to expose the full width of said skelp.
10. Apparatus for heating the edges of a skelp comprising a retort'body extending along each side edge of the skelp, each retort body including a fixed lower section having a supporting surface over which the skelp travels, a movable upper section with a surface spaced from but covering the top face of the skelp for a distance back from the edge of the skelp when the retort is closed, a torch located between the upper and lower sections of the retort body in position to direct a system of flame against the edge face of the skelp, means holding the torch in place with passages above and below the torchfor the admission of air to burn envelope gas from the flame system of the torch, transversely extending grooves in the skelp supporting surface for confining and guiding some of the products of combustion across the bottom face of the skelp, and means for moving the upper section transversely to open the retort bow and expose the grooves in the lower section and at least a portion of the torch and air passages.
11. A retort body comprising a longitudinally extending fixed lower section having a surface for supporting the edge portion of a skelp' as it v travels through the retort body, a movable upper section overlying the lower section and having a surface substantially parallel to the supporting surface of the lower section and spaced from said supporting surface to permit the skelp to pass freely between said surfaces when the retort body is closed, quadrants connected to the ends of'the upper section, pivot connections between the quadrants and a fixed part of the retort body, means to hold the upper section and quadrants in their closed positions, and mechanism for releasing the movable parts of the retort bodyfrom the holding means so that the quadrants rockv on their pivot connections and .shift the upper section transversely of the skelp to open the retort body.
JAMES L. ANDERSON.
US20388A 1935-05-08 1935-05-08 Skelp retort Expired - Lifetime US2053234A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646267A (en) * 1948-06-25 1953-07-21 Air Reduction Retort for heating the edge of skelp in the manufacture of welded pipe or tubing
US5435162A (en) * 1993-08-05 1995-07-25 Caterpillar Inc. Zone heating apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646267A (en) * 1948-06-25 1953-07-21 Air Reduction Retort for heating the edge of skelp in the manufacture of welded pipe or tubing
US5435162A (en) * 1993-08-05 1995-07-25 Caterpillar Inc. Zone heating apparatus

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