US92761A - Improved apparatus for drawing tube-skelfs - Google Patents
Improved apparatus for drawing tube-skelfs Download PDFInfo
- Publication number
- US92761A US92761A US92761DA US92761A US 92761 A US92761 A US 92761A US 92761D A US92761D A US 92761DA US 92761 A US92761 A US 92761A
- Authority
- US
- United States
- Prior art keywords
- dies
- tongs
- skelp
- mandrel
- skelfs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000001331 Nose Anatomy 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 2
- 241000282619 Hylobates lar Species 0.000 description 2
- 210000001847 Jaw Anatomy 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000000881 depressing Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002459 sustained Effects 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture 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
- B21C37/08—Making tubes with welded or soldered seams
Definitions
- the bending-dies D D are formed of such internal shape as gradually and easily to roll up the flat strip 'of metal (or skelps) S, while it is drawn by the tongs T, through or between the dies; the tongs T being made as thin or narrow as is consistent with the strain uponthem, and passing into the dies along a slot, at P P this construction and method being that patented by Mildred Blakey, No. 70,397, November 5, 1867, upon whose process our invention is an improvement.
- skelps have been bent by means of solid or fixed dies, which give the outer shape to the bent skelp, with and without the combination of a fixed or movable mandrel to give the inside shape to the bent skelp,.the whole being used in connection with the ordinary draw-bench and lazy-tongs, where the end of the skelp is previously bent into shape, or is trimmed down to a point, or has a helper7 (or handle) welded or bra-Zed upon it, such end, point, or helper being inserted through the die, so as to be grasped by the lazy-tongs.
- helper7 or handle
- the pin or carrier for supporting the nose or end of the tongs while passing along the dies, substantially as described.
- anges or sliding surfaces F F formed upon the dies or independent of them, upon which the pin, or its equivalent mechanical device, can be made -to move, substantiallyas described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Adornments (AREA)
Description
dilated time @met @time STEPHEN l. M. TASKER ANDRBERT B'RIGGS, OF PHI PENNSYLVANIA.
Letters Patent No. 92,7 61, dated July 20, 1869.
IMPROVED APPARATUS FOR DRAWING TUBE-SKELPS.
The Schedule referred to in these Letters Patent and making part of the same.
To ull whom 'it may concern.:
Be it known that we, STEPHEN P. M. TAsKER and ltonnn'r Barcos, both of Philadelphia, in the county otPhiladelphia, and State of Pennsylvania, have invented a new and useful Improvement in llongs, Mandrel, and Dies, for Bending up the Skelps or Strips-of Metal Used in Making Tubes; and we do hereby declare" To enable others skilled in the art of making tubes to make and use our invention, we will proceed lto describe its construction and operation.
The bending-dies D D are formed of such internal shape as gradually and easily to roll up the flat strip 'of metal (or skelps) S, while it is drawn by the tongs T, through or between the dies; the tongs T being made as thin or narrow as is consistent with the strain uponthem, and passing into the dies along a slot, at P P this construction and method being that patented by Mildred Blakey, No. 70,397, November 5, 1867, upon whose process our invention is an improvement.
In order to bend skelps of lap-welded tubes, it is the most common practice to have a mandrel placedin between the dies, to sustain the skelp, and keep the edges of thelaps together. rlhis has been heretofore done by placing a mandrel upon the skelp and permitting it to be dragged in to the dies with it, a process which leaves a part of' the'end of the tubes, where the tongs take hohl, unsupported, and ilnperfectly lapped, and also demands a workman to handle and cool the mandrel. v
By our improvement themandrel is permanently placed in the dies, being held from pa-ssing through by a shoulder or projection at g, and along the top ot' this niandrelwe form a groove or 'slot, N, in which the lower bit or nose of the tongs can lie.
l1urthermore, in order to prevent the drawing of the tongs from depressing the mandrel upon the dies, or cramping the i-ron of the skelp by an unfair pull with regard to the dies, -we have found it expedient to supportthe nose of the tongs by a carrying-pin, U, which is made'to ride upon flanges E E, attached to the dies, the upper edges of which are ,parallel to the inside of' the top of the die, so that the skelp is sustained whilstthe tongs are passing through or along the die or mandrel, after which time, the skelp being lapped smoothly around the mandrel, no further external support is needed.
Weare aware that skelps have been bent by means of solid or fixed dies, which give the outer shape to the bent skelp, with and without the combination of a fixed or movable mandrel to give the inside shape to the bent skelp,.the whole being used in connection with the ordinary draw-bench and lazy-tongs, where the end of the skelp is previously bent into shape, or is trimmed down to a point, or has a helper7 (or handle) welded or bra-Zed upon it, such end, point, or helper being inserted through the die, so as to be grasped by the lazy-tongs. Arrangements and combinations of this kind are of Well-known, long-continued, and even ancient use, and` are constantly practised, in the manlifacture of stair-rods, brass inonldings and tubes, lnibnf` lar sash-bars, andother hollow or trough-forms; but we do not claim any improvement except in combination with such fixed dies as will admit the tongs to'be passed along, and through them, so that the tongs can lay hold upon the unbent and unprepared end of the Skel Alge are aware of the invention of Mildred Blakey, before referred to, and disclaim anything therein claimed or described, this, our invention, being applicable therewith as an improvement; but
What we claim as our invention, and desire to secure by Letters Patent, isg g 1. The permanent or fixed mandrel, in combination with two permanent and xed dies, Whose upper edges are separated longitudinally, so that the tongs can be passed along and between them, to lay hold upon the skelp, substantially as described. l
2. Also, the slot or groove along the mandrel, 1n which the lower bit or jaw of the tongs can pass, while the end ofthe skelp, to which the tongs are attached, is passing the dies, substantially as described.
3. Also, the pin or carrier for supporting the nose or end of the tongs while passing along the dies, substantially as described.
4. Also, the anges or sliding surfaces F F, formed upon the dies or independent of them, upon which the pin, or its equivalent mechanical device, can be made -to move, substantiallyas described.
STEPHEN P. M. TASKER. ROBT. BnIGGs. lVitnesses XV. HARRY STIRLING, JAMES NICHOLSON.
L-ADELHIA.
Publications (1)
Publication Number | Publication Date |
---|---|
US92761A true US92761A (en) | 1869-07-20 |
Family
ID=2162238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US92761D Expired - Lifetime US92761A (en) | Improved apparatus for drawing tube-skelfs |
Country Status (1)
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US (1) | US92761A (en) |
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- US US92761D patent/US92761A/en not_active Expired - Lifetime
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