US507709A - Sheet-metal pipe - Google Patents

Sheet-metal pipe Download PDF

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US507709A
US507709A US507709DA US507709A US 507709 A US507709 A US 507709A US 507709D A US507709D A US 507709DA US 507709 A US507709 A US 507709A
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pipe
leaf
leaves
edge
wire
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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

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  • the object of my invention is to produce a cheap, strong and durable pipe, suitable for [0 conveying water, 850. a
  • My invention is especially adaptedfor use in preparing pipe from thin sheet metal formed into convolute or partially convolute rolls and spirally wound with wire or strap
  • My invention broadly stated comprises a pipe consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond each end of the outer leaf, and having its outer leaf of greater width than such inner leaf, the two leaves being rolled into tubular shape and the projecting ends of the inner leaf being turned outward over the ends of'the outer leaf to cover the joint between the two leaves, and suitable'means for retaining the pipe in shape.
  • My invention also comprises a pipe consisting of a plate of sheet metal bent upon itself to form two leaves, and having its in-- ner leaf of suit-ablewidth to form the sized pipe desired, and having its outer leaf of greater width than its inner leaf, the'two leaves being rolledinto tubular shape; an S- shaped lap strip having one of its folds arranged embracing the bent edge of the two leaves and having its other fold arranged embracing the single edge 'of the inner leaf a suitable wrapping arranged -to retain the pipe in shape, and the whole covered with a coating of preservative material.
  • My invention further comprises a pipe consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond each end of the outer leaf, and having its outer leaf of greater width than its inner leaf, the two leaves being rolled into tubular shape; an 8 shaped lap strip having one of its folds arranged embracing the bent edge of the two leaves, and having its other fold arranged embracing the single edge of the inner leaf, the projecting ends of the inner leaf being turned outward over the ends of the outer leaf; a suitable wrapping of wire arranged to retain the pipe in shape, and the whole covered with a coating of preservative material.
  • My invention further comprises various combinations and arrangement of parts hereinafter fully set forth.
  • Figure 1 is a plan View of a sheet of metal cut into shape ready to be folded upon itself to form alength of my improved pipe.
  • Fig. 2 is a view of the same with the inner leaf folded upon the outer leaf, and ready to be passed through the rolls and formed into tubular shape.
  • Fig. 3 is an end view of the sheet formed into tubular shape ready to be Wrapped.
  • Fig. 4 is a fragmental side elevation of the same in a different position fromthat shown in Fig. 3.
  • Fig. 5 is a fragmental perspective View of one end of a plpe constructed according to my invention, illustrating my improved means for securing the end of thewire wrapping.
  • Fig. 6 is a fragmental side elevation of a completed pipe embodying my invention.
  • Fig. 1 is a plan View of a sheet of metal cut into shape ready to be folded upon itself to form alength of my improved pipe.
  • Fig. 2 is a view of the same with the inner leaf folded upon the outer leaf, and ready to be passed through
  • FIG. 7 is a longitudinal fragmental sectional view of my 1mproved'lap joint; line x:1: Fig. 3 indicates the line of section.
  • Fig. 8 is a cross section of the same on line y-y Fig. 7.
  • Fig. 9 is a fragmental cross section of a modified form of. joint.”-
  • A' represents thesheet of metal which is cut into the shape shown in Fig.1, and is then folded as shown in Fig. 2 to form the inner leaf a and the outer leaf or.
  • the outer leaf a is of greater width than the inner leaf a to form a lap joint, and to assist in retaining the pipe in shape.
  • the inner leaf is longerthan the outer leaf as illustrated in Figs. 1, 2 and 5, to allow the projecting end to be turned back over the end of the outer leaf a to form an end cap a" which prevents the entrance of any water from the end of the pipe into the joint between the leaves of :ca
  • Fig. 7 where the cap is shown in section.
  • This cap also forms a smooth end for the pipe in addition to making a water tight joint at the end,and also assists in binding the two leaves together and holding the pipe in shape when the joints are driven together when the pipe is laid.
  • I provide one edge of such inner leaf with a suitable edge receiving seat adapted and arranged to receive and seat the other edge of such leaf.
  • this seat consists of an S shaped lap strip B which is formed of sheet metal and has one fold 1) arranged upon and embracing the bent edge a of the two leaves, and has its other fold b arranged upon and embracing the single edge of the inner leaf a.
  • This edge receiving seat may be formed integral with the single edge of the inner leaf, if desired, as shown in Fig. 9, and I do not limit my claims to the use of the independent S shaped lap strip.
  • I provide an improved fastening for wire wound metal pipe consisting of two or more thicknesses of sheet metal, which consists essentially of a wire C, having one end provided with a rivet receiving loop 0 and inserted beneath the outer leaf of the pipe (as shown in Fig. 4) when the pipe is formed, thence passing spirally around the pipe to the other end thereof, and provided at such other end of the pipe with an end receiving loop 0 formed in the wire, thence passing one or more times around the pipe beyond such loop and having its end 0 passed through such loop and secured by bending the wire backward upon itself.
  • a rivet 0, shown in dotted lines in Fig.
  • the sheets are prepared for making the pipe by cutting them into the form shown in Fig. 1, then bending the sheet upon itself to bring the two leaves together as shown in Fig. 2, then starting the reversely bent edge a of the two leaves into the former rolls and forming the leavesinto tubular shape as illustrated in Fig. 3; before the reversely bent edge a enters the roll upon its second round, the S shaped lap strip B is placed upon such edge with its inner fold embracing the edge in the manner shown in Fig. 3. Then, as the rolls revolve, the single edge of the inner leaf a is brought into position by the action of the rolls and is inserted into the outer fold of the S shaped strip as shown in Fig. 3.
  • the joint thus formed is passed through the rolls which tightens the lap strip firmly upon the two edges and forms a tight joint.
  • the end of the wire wrapping O which is provided with the loop 0 is inserted between the outer leaf and the body of the pipe, with the loop in the position shown in Fig. 4.
  • the rolls are revolved to carry the pipe around and the wire is wrapped spirally around the pipe as shown in Figs. 5 and 6 until the other end of the pipe is reached, suflicient tension be ing placed upon the wire to cause it to bind upon the pipe firmly; when the other end of the pipe is reached, a loop 0' is formed in the wire, as illustrated in Fig. 5 and the wire is carried beyond the loop one or more timesthe two ends are lapped past each other.
  • the lap strip also holds the inner edge of the pipe from springing out into the pipe, which sometimes occurs in ordinary wire wrapped convolute sheet metal pipe.
  • the sheet metal plates are lightly coated with asphaltum before being formed into pipe, and melted asphaltum is applied to the joint before it is covered by the outer leaf, and the completed pipe is also dipped in melted asphaltum which fills the seams of the joint and absolutely prevents leakage.
  • the end cap a prevents the entrance of water between the leaves from the end of the pipe, and the over-lapping end of the outer leaf strengthens and protects the joint so that my improved pipe will stand a heavy pressure without liability of leakage, although made of thin light iron.
  • the pipe set forth consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond each end of the outer leaf, and having its outer leaf of greater width than its inner leaf, the two leaves being rolled into tubular shape and the projecting ends of the inner leaf beingturnod outward over the ends of the outer leaf to cover the joint between the two leaves and suitable means for retaining the pipe in shape.
  • the pipe set forth consisting of a plate of sheet metal bent upon itself to form two leaves, and having its outer leaf of greater width than its inner leaf, and having one-of the edges of the inner leaf provided with a suitable edge receiving seat adapted and arranged to receive and'seat the other edge of such leaf, the two leaves being formed into tubular shape, one edge of the inner leaf be lng seated in the seat provided upon the other edge of such leaf, a wrapping of wire wound around such pipe, and the whole covered with a coating of preservative material.
  • the pipe set forth consisting of a plate of sheet metal bent upon itself 'to form two leaves, and having its inner leaf of greater length than its outer leaf, and having its outer leaf of greater width than its inner leaf, one of the edges of the inner leaf being provided with a suitable edge receiving seat arranged to receive and seat the other edge of such inner leaf, the two leaves being rolled into tubu lar shape and the projecting ends of the inner leaf being turned outward over the ends of the outer leaf, and a suitable fastening arranged to retain the pipe in shape.
  • the pipe set forth consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond the ends of the outer leaf, and having its outer leaf of greater width than its inner leaf, the two leaves being rolled into tubular shape; an S shaped lap strip having one of its folds arranged embracing the reversely bent edge of the'two leaves and having its other fold arranged embracing the single edge of the inner leaf, the projecting ends of the inner leaf being turned outward over the ends of the outer leaf; a suitable wrapping of wire arranged to retain the pipe in shape, and the Whole covered with a coating of preservative material.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Description

. (No Model.)
2 Sheets-Sheet 1. C. HAMLIN. 1 SHEET METAL PIPE- No.'507,709. Patented 001;. 31,1893.
wibmm. I V y d 3mm 5 WQ W W4 (N0 Model.) 2 Sheets-Sheet 2.
C. S. HAMLIN. SHEET METAL PIPE.
No. 507,709. P Patented 0ot. 31,1893.
UNITED STATES PATENT OFFICE.
CHARLES S. HAMLIN, OF LOS ANGELES, ASSIGNOR OF ONE-HALF TO ARTHUR C. HARPER, OF UNIVERSITY, CALIFORNIA.
HSHE/ET-METAL PIPE.
SPECIFICATION forming part of Letters Patent No. 507,709, dated October 31, 1893.
Application filed June 1, 1893. Serial No. 476,260. (No model.)
To all whom it may concern.-
Be it known that I, CHARLES S. HAMLIN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and 5 State of California, have invented new and useful Improvements in Sheet-Metal Pipes, ofv which the following is a specification.
The object of my invention is to produce a cheap, strong and durable pipe, suitable for [0 conveying water, 850. a
My invention is especially adaptedfor use in preparing pipe from thin sheet metal formed into convolute or partially convolute rolls and spirally wound with wire or strap My invention broadly stated comprises a pipe consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond each end of the outer leaf, and having its outer leaf of greater width than such inner leaf, the two leaves being rolled into tubular shape and the projecting ends of the inner leaf being turned outward over the ends of'the outer leaf to cover the joint between the two leaves, and suitable'means for retaining the pipe in shape.
My invention also comprises a pipe consisting of a plate of sheet metal bent upon itself to form two leaves, and having its in-- ner leaf of suit-ablewidth to form the sized pipe desired, and having its outer leaf of greater width than its inner leaf, the'two leaves being rolledinto tubular shape; an S- shaped lap strip having one of its folds arranged embracing the bent edge of the two leaves and having its other fold arranged embracing the single edge 'of the inner leaf a suitable wrapping arranged -to retain the pipe in shape, and the whole covered with a coating of preservative material.
My invention further comprises a pipe consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond each end of the outer leaf, and having its outer leaf of greater width than its inner leaf, the two leaves being rolled into tubular shape; an 8 shaped lap strip having one of its folds arranged embracing the bent edge of the two leaves, and having its other fold arranged embracing the single edge of the inner leaf, the projecting ends of the inner leaf being turned outward over the ends of the outer leaf; a suitable wrapping of wire arranged to retain the pipe in shape, and the whole covered with a coating of preservative material.
My invention further comprises various combinations and arrangement of parts hereinafter fully set forth.
The accompanying drawings illustrate my invention.
Figure 1 is a plan View of a sheet of metal cut into shape ready to be folded upon itself to form alength of my improved pipe. Fig. 2 is a view of the same with the inner leaf folded upon the outer leaf, and ready to be passed through the rolls and formed into tubular shape. Fig. 3 is an end view of the sheet formed into tubular shape ready to be Wrapped. Fig. 4 is a fragmental side elevation of the same in a different position fromthat shown in Fig. 3.- Fig. 5 is a fragmental perspective View of one end of a plpe constructed according to my invention, illustrating my improved means for securing the end of thewire wrapping. Fig. 6 is a fragmental side elevation of a completed pipe embodying my invention. Fig. 7 is a longitudinal fragmental sectional view of my 1mproved'lap joint; line x:1: Fig. 3 indicates the line of section. Fig. 8 is a cross section of the same on line y-y Fig. 7. Fig. 9 is a fragmental cross section of a modified form of. joint."-
' In the drawings, A'represents thesheet of metal which is cut into the shape shown in Fig.1, and is then folded as shown in Fig. 2 to form the inner leaf a and the outer leaf or. The outer leaf a is of greater width than the inner leaf a to form a lap joint, and to assist in retaining the pipe in shape. The inner leaf is longerthan the outer leaf as illustrated in Figs. 1, 2 and 5, to allow the projecting end to be turned back over the end of the outer leaf a to form an end cap a" which prevents the entrance of any water from the end of the pipe into the joint between the leaves of :ca
sheet metal. This construction is clearly illustrated in Fig. 7, where the cap is shown in section. This cap also forms a smooth end for the pipe in addition to making a water tight joint at the end,and also assists in binding the two leaves together and holding the pipe in shape when the joints are driven together when the pipe is laid. In order to gage the diameter of the pipe, and also to provide means for preventing the inner edge of the inner leaf from springing outward into the pipe, I provide one edge of such inner leaf with a suitable edge receiving seat adapted and arranged to receive and seat the other edge of such leaf. As shown in the drawings, this seat consists of an S shaped lap strip B which is formed of sheet metal and has one fold 1) arranged upon and embracing the bent edge a of the two leaves, and has its other fold b arranged upon and embracing the single edge of the inner leaf a. This edge receiving seat may be formed integral with the single edge of the inner leaf, if desired, as shown in Fig. 9, and I do not limit my claims to the use of the independent S shaped lap strip.
In wrapping pipe with wire, difficulty has been experienced in providing a suitable fastening for securing the ends of the wire upon the pipe, and various means have been devised to produce a suitable fastening therefor.
I provide an improved fastening for wire wound metal pipe consisting of two or more thicknesses of sheet metal, which consists essentially of a wire C, having one end provided with a rivet receiving loop 0 and inserted beneath the outer leaf of the pipe (as shown in Fig. 4) when the pipe is formed, thence passing spirally around the pipe to the other end thereof, and provided at such other end of the pipe with an end receiving loop 0 formed in the wire, thence passing one or more times around the pipe beyond such loop and having its end 0 passed through such loop and secured by bending the wire backward upon itself. This is illustrated in Fig. 5. After the pipe is formed, a rivet 0, (shown in dotted lines in Fig. 6) is inserted through the wall of the pipe, passing through the loop a, and is riveted, thereby securing the other end of the wire between the two leaves of the pipe. By this means I provide a secure fastening for the wire and one which can be made quickly and cheaply.
In practice the sheets are prepared for making the pipe by cutting them into the form shown in Fig. 1, then bending the sheet upon itself to bring the two leaves together as shown in Fig. 2, then starting the reversely bent edge a of the two leaves into the former rolls and forming the leavesinto tubular shape as illustrated in Fig. 3; before the reversely bent edge a enters the roll upon its second round, the S shaped lap strip B is placed upon such edge with its inner fold embracing the edge in the manner shown in Fig. 3. Then, as the rolls revolve, the single edge of the inner leaf a is brought into position by the action of the rolls and is inserted into the outer fold of the S shaped strip as shown in Fig. 3. Then the joint thus formed is passed through the rolls which tightens the lap strip firmly upon the two edges and forms a tight joint. After the lap strip has passed through the rolls and before the free end of the outer leaf is carried in between the rolls, the end of the wire wrapping O which is provided with the loop 0 is inserted between the outer leaf and the body of the pipe, with the loop in the position shown in Fig. 4. Then the rolls are revolved to carry the pipe around and the wire is wrapped spirally around the pipe as shown in Figs. 5 and 6 until the other end of the pipe is reached, suflicient tension be ing placed upon the wire to cause it to bind upon the pipe firmly; when the other end of the pipe is reached, a loop 0' is formed in the wire, as illustrated in Fig. 5 and the wire is carried beyond the loop one or more timesthe two ends are lapped past each other.
and rest in the lap strip as shown in Fig. 3, and when pressure is applied upon the exterior of the pipe, as in wrapping, the two ends resting in the loops of the lap strip, prevents the pipe from being reduced in diameter by such pressure. The lap strip also holds the inner edge of the pipe from springing out into the pipe, which sometimes occurs in ordinary wire wrapped convolute sheet metal pipe.
The sheet metal plates are lightly coated with asphaltum before being formed into pipe, and melted asphaltum is applied to the joint before it is covered by the outer leaf, and the completed pipe is also dipped in melted asphaltum which fills the seams of the joint and absolutely prevents leakage.
The end cap a prevents the entrance of water between the leaves from the end of the pipe, and the over-lapping end of the outer leaf strengthens and protects the joint so that my improved pipe will stand a heavy pressure without liability of leakage, although made of thin light iron.
Now, having described my invention, what I claim as new, and desire to secure by Letters Patent, is-
1. The pipe set forth, consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond each end of the outer leaf, and having its outer leaf of greater width than its inner leaf, the two leaves being rolled into tubular shape and the projecting ends of the inner leaf beingturnod outward over the ends of the outer leaf to cover the joint between the two leaves and suitable means for retaining the pipe in shape.
2. The pipe set forth, consisting of a plate of sheet metal bent upon itself to form two leaves, and having its outer leaf of greater width than its inner leaf, and having one-of the edges of the inner leaf provided with a suitable edge receiving seat adapted and arranged to receive and'seat the other edge of such leaf, the two leaves being formed into tubular shape, one edge of the inner leaf be lng seated in the seat provided upon the other edge of such leaf, a wrapping of wire wound around such pipe, and the whole covered with a coating of preservative material.
3. The pipe set forth, consisting of a plate of sheet metal bent upon itself 'to form two leaves, and having its inner leaf of greater length than its outer leaf, and having its outer leaf of greater width than its inner leaf, one of the edges of the inner leaf being provided with a suitable edge receiving seat arranged to receive and seat the other edge of such inner leaf, the two leaves being rolled into tubu lar shape and the projecting ends of the inner leaf being turned outward over the ends of the outer leaf, and a suitable fastening arranged to retain the pipe in shape.
4. The pipe set forth, consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of suitable,
width to form the sized pipe desired, and having its outerleaf of greater width than its inner leaf, the two leaves being rolled into tubular shape; an S shaped lap strip having one of its folds arranged embracing the bent edge of the two leaves, and having its other fold arranged embracing the single edge of the inner leaf; a suitable wrapping arranged to retain the pipe in shape, and the whole covered with a coating of preservative material.
5. The pipe set forth, consisting of a plate of sheet metal bent upon itself to form two leaves, and having its inner leaf of greater length than its outer leaf and projecting equally beyond the ends of the outer leaf, and having its outer leaf of greater width than its inner leaf, the two leaves being rolled into tubular shape; an S shaped lap strip having one of its folds arranged embracing the reversely bent edge of the'two leaves and having its other fold arranged embracing the single edge of the inner leaf, the projecting ends of the inner leaf being turned outward over the ends of the outer leaf; a suitable wrapping of wire arranged to retain the pipe in shape, and the Whole covered with a coating of preservative material.
6. In a sheet metal pipe consisting of two or more thicknesses of sheet metal, the wire wrapping, having one end provided with the rivet receiving loop and inserted beneath the outer leaf of the pipe when the pipe is formed, thence passing spirally around the pipe to the other end thereof, and provided at such other end of the pipe with an end receiving loop formed in the wire, thence passing one or more times around the pipe beyond such loop and'having its end passed through such loop ,and secured by bending the wire backward
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