US2279726A - Method of making lightweight cylinders - Google Patents

Method of making lightweight cylinders Download PDF

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Publication number
US2279726A
US2279726A US301350A US30135039A US2279726A US 2279726 A US2279726 A US 2279726A US 301350 A US301350 A US 301350A US 30135039 A US30135039 A US 30135039A US 2279726 A US2279726 A US 2279726A
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United States
Prior art keywords
container
wall
closed
base
cylinders
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Expired - Lifetime
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US301350A
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Scott E Allen
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CO Two Fire Equipment Co
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CO Two Fire Equipment Co
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Publication date
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Priority to US301350A priority Critical patent/US2279726A/en
Application granted granted Critical
Publication of US2279726A publication Critical patent/US2279726A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00Making hollow articles not covered by a single preceding sub-group
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00Receptacles
    • Y10S220/22Seamless
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49428Gas and water specific plumbing component making
    • Y10T29/49446Ferrule making or reforming
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining

Definitions

  • This invention relates to lightweight high pressure cylinders or containers and the method of making the same.
  • Fig. 2 shows the end of the blank closed-in to form the base of the container
  • Containers also have been formed from an openended cylindrical blank in which one end was closed-in to form the bottom or base and the other to form the neck and shoulder of the container. In both of these methods the thickness of the wall of the closed-in end or ends was much greater than necessary to withstand a predetermined high pressure. with the result that these containers were unnecessarily heavy for certain uses.
  • the central or welded portion was found to be non-homogeneous and to develop leaks under pressure. To overcome this, the central portion was drilled out and filled by a plug.
  • Fig. 1 I have disclosed in longitudinal section one end' oi a cylindrical blank 5, the other end of which may be a continuation of a cylin-- der or may be provided with a shoulder and neck formed in any suitable manner. my method, the end of the blank 5 is spun shut or turned inwardly by any known method producing the construction shown in Fig.
  • Fig. 1 is a longitudinal section of a part of a cylindrical blank from whichv a container may be formed;
  • a suitable machining tool not disclosed but well known, may be inserted through the opening produced by the drill and metal removed from the inside face of the end of the container.
  • the amount of material and the area in which the material is removed is indicated at IU, Fig. 3, leaving the end wall or base ll of the same, or, if desired, less thickness than that of the-blank 5.
  • As shown of the container are made relative'y thin, it is necessary to provide the same with a boss I2 in order that there'may be sufficient anchorage for the plug which is to be secured therein and suificient length of thread to prevent leakage.
  • container so formed has the necessary strength and is of as light weight as possible, is leakproof, has an exterior smooth base, and is of a minimum length, constituting advantages which were not possible with the methods heretofore use'd.'
  • the method of producing a high pressure cylindrical thin walled metal container from a tube open at at least one end which comprises closing-in an open end of the tube by a spinning, operation producing, an end wall of greater thickness than the side wall of the container, drilling an orifice through said end wall axially of said' container, and machining excess thickness oi metal from an annular zone on the inner face of the end wall surrounding said oriflce and spaced from the axis of said container at greater radial distance than the length of the radius of said closing-in an open end of the tube by a spinning operation producing an end wall of greater thickness than the side wall ofthe container, drilling an orifice through said end wall of said container, machining excess thickness of metal from an annular zone on the i'ace oi the end wall surrounding said orifice and spaced from the axis of the container at greater radial distance than the length of the radius oi. said oriiice, and securing a plug in said orifice.
  • the method oi producing ,a high pressure cylindrical thin walled metal container from a tube open at'at least one end, which comprises closing-in an open end of the tube by a spinning operation producing an end wall oi greater thickness than the side wall of .the container, drilling an orifice through said end wa axially of said container, machining excess t ckness of metal from an annular zone on the inner iace oi the end wall surrounding said oriilce and spaced from the axis of the container at a greater radial distance than the length of the radius of said orifice, and providing the wall of said orifice with a screw thread.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Description

April 1942- s. E. ALLEN 2,279,726
METHOD OF MAKING LIGHTWEIGHT CYLINDERS Filed 001:. 26, 1939 INVENTOR SCOTT EALLEN I TTORNEY Patented Apr. 14, 1942 CYLINDERS Scott E. Allen, Verona, N. J., assignor to C O-Two Fire Equipment Company, Newark, N. J., a corporation of Delaware Application October 26, 1939, Serial No. 301,350
3 Claims.
This invention relates to lightweight high pressure cylinders or containers and the method of making the same.
Heretofore containers have been formed as cylinders open at one end and closed at the other, from plates or billets by successive drawing operations, the cylinders being subsequently (eras-148.2)
Fig. 2 shows the end of the blank closed-in to form the base of the container; and
closed-in or shaped at the open end to receive the coupling of a delivery pipe or nozzle. Containers also have been formed from an openended cylindrical blank in which one end was closed-in to form the bottom or base and the other to form the neck and shoulder of the container. In both of these methods the thickness of the wall of the closed-in end or ends was much greater than necessary to withstand a predetermined high pressure. with the result that these containers were unnecessarily heavy for certain uses. The central or welded portion was found to be non-homogeneous and to develop leaks under pressure. To overcome this, the central portion was drilled out and filled by a plug. It has also been proposed to remove metal either from the exterior and from both the exterior and interior surfaces of the closed end wall to reduce the weight of the cylinder, leaving the metal on the exterior at the central portion of the closed Fig. 3 shows the finished container. In Fig. 1 I have disclosed in longitudinal section one end' oi a cylindrical blank 5, the other end of which may be a continuation of a cylin-- der or may be provided with a shoulder and neck formed in any suitable manner. my method, the end of the blank 5 is spun shut or turned inwardly by any known method producing the construction shown in Fig. 2 inwhich the wall 6 of the body of the container is of the same thickness as the wallof the blank 5 and in which the wall of tha base 1 is of much greater thickness, the wall thickness of the base lbeing much greater than necessary to withstandthe pressure for which the container is made. In
spinning in the end of the container as is known, the ends of the blank are welded or fused together at the center of the closed end as indicated at 8 at which point, however, the material 7 may be traversed by pipes or valleys and may leak at this point or leaks may develop later. I therefore propose to remove the material at this point in the base of the container by drilling as indicated by the representation of a drill 9 in Fig.2. After this has been done and in case the end untouched resulting in a projection or boss on the outer side of the closed end of the container. This, of course, is objectionable in that the length of the containers is increased by the length of the projection and this projection also interferes with resting the containeron its closed end and impacts against it may injure the close end ofthe container.
Therefore, it is an object of my invention to provide a lightweight high pressure container in which the closed end or base of the container is Y of minimum wall thickness required to withstand a predetermined high pressure and one in which the increase of wall thickness necessary to support a closure plug occurs on the inner face of the base of the container thus providing a shorter container and one in which the outer face of the base is smooth and does not present any projecting boss interfering with resting the container on its base or which might receive impactsdisrupting the container.
Other objects of the invention will appear from the following description, taken in connection with the drawing, in which'- Fig. 1 is a longitudinal section of a part of a cylindrical blank from whichv a container may be formed;
container is closed-in at the other end, a suitable machining tool, not disclosed but well known, may be inserted through the opening produced by the drill and metal removed from the inside face of the end of the container. The amount of material and the area in which the material is removed is indicated at IU, Fig. 3, leaving the end wall or base ll of the same, or, if desired, less thickness than that of the-blank 5. As shown of the container are made relative'y thin, it is necessary to provide the same with a boss I2 in order that there'may be sufficient anchorage for the plug which is to be secured therein and suificient length of thread to prevent leakage. The
container so formed has the necessary strength and is of as light weight as possible, is leakproof, has an exterior smooth base, and is of a minimum length, constituting advantages which were not possible with the methods heretofore use'd.'
While I have disclosed one method of manufacturing containers and disclosed one form of container made by this method, it is to be undera stood that I reserve the right to all such changes In carrying out- I as come within the principles of my invention and the scope of the appended claims.
I claim:
1. The method of producing a high pressure cylindrical thin walled metal container from a tube open at at least one end, ,which comprises closing-in an open end of the tube by a spinning, operation producing, an end wall of greater thickness than the side wall of the container, drilling an orifice through said end wall axially of said' container, and machining excess thickness oi metal from an annular zone on the inner face of the end wall surrounding said oriflce and spaced from the axis of said container at greater radial distance than the length of the radius of said closing-in an open end of the tube by a spinning operation producing an end wall of greater thickness than the side wall ofthe container, drilling an orifice through said end wall of said container, machining excess thickness of metal from an annular zone on the i'ace oi the end wall surrounding said orifice and spaced from the axis of the container at greater radial distance than the length of the radius oi. said oriiice, and securing a plug in said orifice.
3. The method oi producing ,a high pressure cylindrical thin walled metal container from a tube open at'at least one end, which comprises closing-in an open end of the tube by a spinning operation producing an end wall oi greater thickness than the side wall of .the container, drilling an orifice through said end wa axially of said container, machining excess t ckness of metal from an annular zone on the inner iace oi the end wall surrounding said oriilce and spaced from the axis of the container at a greater radial distance than the length of the radius of said orifice, and providing the wall of said orifice with a screw thread. 7
US301350A 1939-10-26 1939-10-26 Method of making lightweight cylinders Expired - Lifetime US2279726A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421629A (en) * 1943-02-10 1947-06-03 Otto A Langos Method for closing the ends of metal tubes
US2580244A (en) * 1946-10-24 1951-12-25 Roberts Edwin Gilber Llewellyn Mineral insulated conductor workpiece
US2916799A (en) * 1954-02-02 1959-12-15 Lyon George Albert Method of making bomb head shells
US2929102A (en) * 1956-10-31 1960-03-22 John T Riddell Inc Apparatus and method for making face guards
US3733682A (en) * 1967-02-02 1973-05-22 J Mercier Method of forming a locking ring for pressure vessel
DE2604959A1 (en) * 1975-02-24 1976-09-02 Greer Hydraulics Inc PRESSURE VESSEL AND PROCESS FOR ITS MANUFACTURING

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421629A (en) * 1943-02-10 1947-06-03 Otto A Langos Method for closing the ends of metal tubes
US2580244A (en) * 1946-10-24 1951-12-25 Roberts Edwin Gilber Llewellyn Mineral insulated conductor workpiece
US2916799A (en) * 1954-02-02 1959-12-15 Lyon George Albert Method of making bomb head shells
US2929102A (en) * 1956-10-31 1960-03-22 John T Riddell Inc Apparatus and method for making face guards
US3733682A (en) * 1967-02-02 1973-05-22 J Mercier Method of forming a locking ring for pressure vessel
DE2604959A1 (en) * 1975-02-24 1976-09-02 Greer Hydraulics Inc PRESSURE VESSEL AND PROCESS FOR ITS MANUFACTURING
FR2301713A1 (en) * 1975-02-24 1976-09-17 Olaer Patent Co PRESSURE TANK AND ITS MANUFACTURING PROCESS
US4077100A (en) * 1975-02-24 1978-03-07 Greer Hydraulics, Inc. Method of forming pressure accumulator

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