US2243164A

US2243164A - Insulated metal barrel

Info

Publication number: US2243164A
Application number: US124433A
Authority: US
Inventors: Robert H Maddock
Original assignee: Midland Steel Products Co
Current assignee: Midland Steel Products Co
Priority date: 1933-11-27
Filing date: 1937-02-06
Publication date: 1941-05-27
Anticipated expiration: 1958-05-27

Description

My 27, 1941. R MADDOCK '2,243,164

INSULATED METAL BARREL originalfiied Nov, 27, 1955 lul Z4 5 5o 5 a Patented May 27, 1941 INSULATED METAL BARREL Robert H. Maddock, (lleveland, Ohio, assignor to The Midland Steel Products Company, Cleveland, Ohio, a corporation of Ohio Original application November 27, 1933, Serial No. 699,821, now Patent No. 2,080,326, dated May 11, 1937. Divided and this application February 6, 1937, iSerial No. 124,433

7 Claims.

This invention relates to new and useful improvements in insulated metal barrels and is a division of my co-pending application Serial No. 699,821 led November 27, 1933, and which matured into Patent 2,080,326 granted May 11, 1937.

An important object of the invention is to form only the bung side of the inner shell with a bilge to facilitate complete drainage of the container and to provide a bung structure which does not interfere with the ready assembly of the inner and outer shells.

A further object of the invention is to provide a special form of tap bush plate which is associated with the heads of the inner and outer shells in a manner to relieve the weld between the tap bush and inner shell from excessive stresses tending to weaken the welded joints.

A still further object of the invention is to provide the outer shell with integral rolling rings or hoops pressed out of the metal itself and to increase the section modulus of such ribs with means which are entirely free of all contact with the insulated inner shell in a manner toprevent denting of the outer shell from distorting the in-v ner shell.

Still another object of the invention is to provide the rolling rings or ribs with shock absorbing adjuncts which add materially to the long life of the barrel under the most adverse handling conditions.

Other objects and advantages of the invention will become apparent during the course of the following description.

In the accompanying drawing forming a part of the description and wherein like parts throughout the several views are referred to with corresponding numerals.

Fig. 1 is a side elevation of the improved barrel.

Fig. 2 is a longitudinal section of the same,

Fig. 3 is a top plan of the barrel,

Fig. 4 is an enlarged fragmentary longitudinal section showing a modif-led construction,

Fig. 5 is a modified form of tap,

Fig. 6 is a section of another modified form of tap,

Fig. 7 is an enlarged section illustrating the application of one form of shock absorbing rings applied to the rolling ribs,

Fig. 8 is a modified form of the same,

Fig. 9 is a further modified form of the shock absorbing rolling ring.

Referring now to the drawing for various details, the numeral I0 designates an outer bilged shell of mild steel or other suitable metal having a bung hole II at the middle of one of its sides and upon each side of which in the bilged portion are formed a pair of outwardly pressed integral annular ribs I2 and I 3, the two innermost ribs I3, due to the bilge of the barrel, having the greater circumference and consequently forming the two rings upon which the barrel is rolled in transportation. This outer shell is preferably formed from a flat sheet of metal rolled into a cylinder with its two longitudinal edges juxtaposed for welding with a longitudinal seam opposite the side in which the bung is provided. This cylindrical shell is then bilged and the ribs I2 and I3 are formed therein.

In Fig. 2 it will be noted that the ends of the outer shell in the completed barrel are rolled into beads I4, but it is to be understood that this is the nal assembly step in the construction of thel barrel and before the inner shell I5 is placed therein. The chime portions of the outer shell I0 are of true cylindrical form or substantially so in view of a purpose which will presently appear.

To protect the outer as well `as the inner shell against distortion due to the impact of the barrel with other objects, reinforcing rings I 6 of substantially channel shape cross section are tted and spot welded at spaced intervals as indicated by the numeral I 'I to the bottom of the two central rolling ribs I3 with the flanges of these reinforcing rings extending inwardly as shown in Fig. 2 to increase the section modulus of the ribs I3. These reinforcing rings are not necessarily continuous hoops or rings but may be so if desired.

The inner shell I5 of the insulated barrel may be constructed of steel having its interior suitably pitched or may be composed of metal which requires no pitching such as stainless steel, aluminum, Monel metal or any other material which is non-oxidizing and which will not contaminate the contents of the barrel.' This inner shell I5 is also formed from a nat blank rolled into a cylinder and welded along a longitudinal line lengthwise of thev barrel and provided near each end with an inwardly extending annular bead I8. The longitudinal half I9 of the inner shell carryingthe bung 20 is bilged and this bilge merges into the other longitudinal half of the inner shell which is substantially cylindrical as best appreciated from Fig. 2 of the drawing. 'Ihis construction provides for the complete drainage of the barrel. From this figure it will also be apparent that the ends or chimes of the inner shell designated by the numeral 2| beyond the beads I8 are perfectly cylindrical and do not contact in the slightest degree with any part of the outer shell or `the end headsthereof. The bung 20 as shown is a drop forging-and on its under side is grooved for the reception of the outwardly flared edges of the bung hole II which are welded circumferentially to the bung as at 22. This bung 20 is much larger than the bung hole and is further spot welded as at 20 at several places near its outer margin to the inner shell to transmit stress from the outer shell to the inner at points remote from the circumferential weld.

The two ends or heads 23 and 24 of the inner shell are outwardly dished discs of the same material as the shell I and are each provided with a surrounding annular axially extending flange 26, the circumference of which is slightly less than the circumference of the inner surface of the chime portion of the outer shell. The heads 23 and 24 are slipped into the ends of the inner shell as far as they will go and against the beads I8 which limit their inward movement. The anges 25 are then circumferentially seam welded to the cylindrical chime portions of the inner shell to form aliquid tight container, the inner surfaces of which are suitably pitched if the shell is constructed of material which will oxidize. One of the heads, as best seen'in Fig. 2 is provided with a top opening 21 through which the reduced end of a tap bush 28 is extended and welded at 10 on the inside of the head. This reduced portion of the bush 28 also extends through an opening in a tap bush plate 29 so that the annular shoulder of the bush overlaps the margin of this opening which is provided in the depressed central portion of the plate 29 to provide suicient clearance between the upper end of the bush and the walls of cavity 30 in the tap bush plate to receive the margin of the opening in this plate as shown. This plate is provided with inclined portions 60 to position its surrounding marginal portions 32 against the head 24 to be welded thereto as at 32' at points remote from the weld 10 of the tap to relievev the vsanne of stress.

The end heads 3l and 32 for the outer shell are dished outwardly concentrically with the inner heads so as to be spaced apart throughout their entire area. The top outer head 3l is provided with an aperture 33 the margins of vwhich rest upon the bridge portion 34`of the tap bush plate to be welded at its margin as indicated by the numeral 35. Both outer heads 3| and 32' are otherwise similar in construction and each is provided with a stepped or Z-shaped flange 36 which includes an annular axially extending flange por-V tion 31 substantially normal to the plane of the head, an intermediate radial portion 38 normal to the portion 31 and extending laterally to meet the chime portion of the outer shell with a portion 6I substantially parallel to the portion 31. The radially 'extending flanges 26 of the inner heads 23 and 24 engage the portion -38 of the outer heads to thereby completely suspend or support the inner shell within the outer one with insulating space completely surrounding the inner shell I5 land both of its heads. This insulating space may be lled with suitable insulating material 8B, but preferably in the form of seaweed enclosed in paper envelopes BI wrapped around the inner shell I5 `and interposed between the heads of the inner and outer shell.

The'outer portions 6I of flanges 36 closely contact with the inner surfaces of the chimes of the outer shelland are seam welded as at 39 thereto so that the insulating space between the shells is a dead air space and sunicient of itself to provide ample insulation for the inner shell. The ange portions 6I of the outer heads of Fig. 2 do not extendl along the ends of the outer shell as far as the corresponding portions 6I shown in Fig. 4, but in either event the ends of the flange portions 6! are enclosed by rolling the extreme ends of the outer shell into beads I4 in Fig. 2, or I4 as shown in Fig. 4. In the latter, the flange portion 6| is of suflicient length to be rolled into a complete bead 40 within the bead I4 of the outer shell. Besides strengthening the ends of the barrel, this bead forms a convenient hand grip at any point around the circumference of either end of the barrel to facilitate handling and lifting thereof.

In assembling the inner and outer shells, the outer head 32 or 3| may be fixed in one end of the outer shell and then the inner shell with its two heads 23 and 24 welded thereto is slipped into the outer shell with the radially extending flanges 25 of the inner ends having only slight clearance with the chime portions of the outer shell. This service in locating the inner shell substantially concentric with the outer one which of course facilitates placement of the outer heads 3l and 32 so that the axial portions 31 slip inside of the axially extending flanges 25 to completely support the inner shell while bringing their radial portions 38 into seating engagement with the radial flange 26. After the outer heads are positioned, they are circumferentially seam welded as at 39 previously described after which the ends of the outer shell are rolled into the beads heretofore described. The edges of the bung hole II may be welded as at 4! to the outer surface of the bung 20 as illustrated in Fig. 2 before or after the heads are assembled. When this welding is done before the flanges of the outer heads are welded to the outer shell, this connection of the two shells serves in locating the inner shell centrally of the outer shell. In case insulating material is used between thel shells, it can be wrapped around the inner shell prior to its assembly in the outer shell and the lateral flanges 26 prevent the insulation from being dragged off of the inner shell with its sliding contact with the outer shell. It will be noted in Fig. 4 that the inner shell I5 is devoid of any head locating beads IS since in this modification the radially extending ange 26 of each head will abut the end of the inner shell to limit movement of the head inwardly of the shell to thereby accurately position it and determine the capacity of the barrel.

Figs. '7 to 9 inclusive show various modifications of shock absorbing rings applied to the two central rolling ribs i3. Fig. 7 discloses a continuous at elastic rubber band 42 which when stretched over rib I3 conforms to the contour thereof and is retained in position by the inherent resiliency of the band. In Fig. 8, a ilexible band 43 of any suitable material, but preferably possessing elasticity and of semi-circular cross section, is vulcanized to a substantially flat metal band 44 which in turn may be welded to the exterior of the rolling rib I3. In Fig. 9, the rolling ribs located as are the ribs I 3, are formed with an exterior arcuate seat 45 on opposite sides of which are outwardly converging surfaces 46 of the rilb whereby a continuous iiexibleV ring 41 preferably of circular cross section and possessing inherent resilience is applied to the rib by rolling the saine along the barrel and up an in` clined wall to seat in the arcuate seat 45 of the rib, where it may be, if desired, cemented or vulcanized in place. In this form of rolling rib 46, the inner channel shaped reinforcing ring 48 is of corresponding cross section to t the contour of the integral rib 46 and is spot welded thereto.

In Fig. 6 is shown a modied form of tap plate and tap bush which is the same as the bush 28 heretofore described with the exception that the bottom 2S of the depression 33 is welded as at 29 in any suitable manner around the edges of the opening 21 in the inner head 24. Furthermore, a gasket 50 is placed in the bottom of the cavity 30 for liquid tight sealing engagement with the bottom of the tap E8 which is provided with a concentric annular threaded flange l for screw threaded engagement with threads provided on the side walls of the depression. In this manner the tap bush 28 can be readily renewed if and when required.

In Fig. 5 a modification of the foregoing type of tap bush and plate is illustrated which is useful when the inner shell and heads are made from non-oxidizable material and the inner head 24 is formed with a flanged tap opening for projection through the tap opening in the bush plate to be bent down and around the edges thereof as indicated at 52. This dispenses with the necessity of a welded joint at this point, since a pliable rubber gasket 53 may be squeezed down upon this flange to overlap the same and fill the cavity by means of the pressure exerted by screwing the tap bush 28 into the cavity of the tap plate.

From the foregoing it will be seen that the radial flanges 2S of the inner shell perform many functions. First they serve in locating the inner shell concentrically within and spaced from the outer shell. Secondly they form footing on the radial portions 3B of the outer heads to resist movement of the inner shell. Insulation 90, Fig. 4 may lbe disposed between these portions 31 and S8 and the iianges 2S to further insulate the inner shell from the outer one. Thirdly, the flanges 26 form conning means for insulation 86 to prevent it from wrinkling or vbeingpulled off of the inner shell when being inserted with the latter into the outer shell. Fourthly, they add much strength to the ends of the inner shell. Fifth, they limit telescoping of the outer heads into the inner heads and the inner heads into the inner shell and thereby determine the capacity of the inner shell and x the spacing of the outer heads from the inner heads. By reason of the ends Gi of the flanges of the outer heads being enclosed Within the heads I4 and I4', stress directed toward the seam Welds 39 from impact is absorbed by the beads.

It will of course be understood that various changes in the shape and arrangement of parts may be resorted to Without departing from the scope of the appended claims.

I claim:

l. A double walled barrel comprising spaced inner and outer walls, having concentric tap openings, a tap bush plate having a depressed portion with an opening registering with the opening in the inner wall and bridging the space between the walls, said plate being Welded to the inner wall around the opening therein, and said plate having its margins sloping from the outer wall to the inner one and welded to the latter at points remote from the Weld around the opening to relieve the same of stress.

2. A double wall barrel comprising spaced inner and outer walls having concentric tap openings, a tap bush plate having a depressed portion with an opening registering with the opening in the inner wall and bridging the space between the walls, a tap bush disposed in said depression with one end extending through the tap opening in the bush plate and welded to the inner wall and also having the other end extended through and welded to the outer wall and the bush plate, said plate having a portion thereof sloping from the outer wall to the inner Wall and Cil Welded to the latter at points remote from the weld around the opening to relieve the same of stress.

3. A double wall barrel comprising an inner wall having a tap opening, an outer wall having a concentric tap opening, a tap bush plate having a depressed central portion enveloped by a iiange of the inner Wall extending through the tap opening in the plate and bent over the top of the depressed portion and said plate having a raised central portion abutting and welded to the outer wall and having an edge portion sloping from the raised central portion to the inner wall and welded thereto.

4. As an article of manufacture, a threaded bung bushing and a threaded bung bush plate for a double walled barrel, having spaced inner and outer walls, said plate being of sheet metal and having a central depressed portion with a tap opening to abut the inner Wall around the said tap opening and a raised central portion abutting the outer wall and inclined to the inner wall, and said plate having the side Walls of the said depressed central portion threaded to receive a tap bung bush.

5. A double walled barrel comprising an outer wall having a tap opening, an inner wall with a concentric tap opening surrounded by a circular depressed portion of the wall, a tap bush plate consisting of a body having a marginal portion welded to the inner wall, said body having an annular raised part, the upper surface of which is Welded to the inside of the outer wall, and said body having a central depressed perforated part abutting and welded to the depressed portion in the inner wall with its opening concentric with the opening in the inner wall.

8. A double walled barrel comprising an outer Wall having a tap opening, an inner wall with a concentric tap opening surrounded by a circular depressed portion of the wall, a tap bush plate consisting of a body having a marginal portion welded to the inner wall, said body having an annular raised part, the upper surface of which is Welded to the inside of the outer wall, said body having a central depressed perforated part abutting the depressed portion in the inner wall, said central depressed portion being enveloped by a portion of the inner Wall projecting through the perforation in the plate and then bent around the edge of said perforation and said body having the inside of its vertical walls threaded.

7. A double walled barrel comprising an outer wall having a tap opening, an inner wall having a concentric tap opening surrounded by a circular depressed portion of the wall, a tap bung bush plate consisting of a body having a marginal portion Welded to the inner wall, said body having an annular raised part the upper surface of which is Welded to the inside of the outer Wall, and said body having a central depressed perforated part abutting and welded to the depressed portion in the inner Wall with its opening concentric with the opening in the inner wall, a tap bung bush disposed in said depression having one end reduced to form a shoulder and to project through the bush` plate to be welded to the inner wall around the opening therein, and shoulder adapted to abut `the surface of the bush plate, and said bung having its other end projecting thlOUgh the Opening in the outer Wall and welded thereto.

ROBERT H. MADDOCK.