US273924A - Manufacture of sewing-thimbles - Google Patents

Manufacture of sewing-thimbles Download PDF

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Publication number
US273924A
US273924A US273924DA US273924A US 273924 A US273924 A US 273924A US 273924D A US273924D A US 273924DA US 273924 A US273924 A US 273924A
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Prior art keywords
thimbles
thimble
sewing
manufacture
rim
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles

Definitions

  • my invention consists in an improved process for manufacturing sewingthimbles provided with a solid rim in one piece, as hereinafter fully set forth.
  • Figure 1 represents a longitudinal section of my improved thimble.
  • Fig. 2 represents a. similar section of the cup from which the thimble is formed.
  • Fig. 3 represents a sectional view of the die and plunger for striking up the rim of the thimble.
  • Figs. 4 and 5 represent the manner of striking up the ordinary thimble made with a turned-over rim.
  • A represents the thimble, provided with a solid rim, B, produced by the conjoint compression and extension of the sheet-metal cup 0 by means of the die D and plunger E.
  • the die D is provided at its upper edge with an annular enlargement or recess, d, and the rear face of the flange E is provided with an annular depression or groove, 0, at the base of the conical projecting portion g.
  • the groove 0 serves to retain the edge of the cup 0 and prevent it from spreading away from the base of the projecting portion 9 when subjected to pressure-in the die. I thus cause the thimble to be made perfectly true and filled out at its inner edge.
  • My improved process thus saves a number of operations, and the thimbles so formed are also more durable than those of the old style, which are liable to become worn through at the rim, while the point of the thimble is still serviceable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Description

(No Model.) 7
W. D. WHITING.
MANUFACTURE OF SEWING THIMBLES. I No. 273,924. Patented Mar. 13,1883.
WITNESSES. INVENTS'R.
lNrrnn STATES PATENT OFFIQE.
WILLIAM D. \NHITING, OF NORTH ATTLEBOROUGH,MASSACHUSETTS:
SPECIFICATION forming part of Letters Patent No. 273,924, dated March 13, 1883.
Application filed October 29, 1881. (No model.)
To all whom it may concern:
Be it known that I, WILLIAM D. WHITING, of North Attleborough, in the county of Bristol and State of Massachusetts, haveinvented an Improvementi'n SeWing-Thimbles, of which the following is a specification.
The nature of my invention consists in an improved process for manufacturing sewingthimbles provided with a solid rim in one piece, as hereinafter fully set forth.
Figure 1 represents a longitudinal section of my improved thimble. Fig. 2 represents a. similar section of the cup from which the thimble is formed. Fig. 3 represents a sectional view of the die and plunger for striking up the rim of the thimble. Figs. 4 and 5 represent the manner of striking up the ordinary thimble made with a turned-over rim.
In the drawings, A represents the thimble, provided with a solid rim, B, produced by the conjoint compression and extension of the sheet-metal cup 0 by means of the die D and plunger E. The die D is provided at its upper edge with an annular enlargement or recess, d, and the rear face of the flange E is provided with an annular depression or groove, 0, at the base of the conical projecting portion g. The groove 0 serves to retain the edge of the cup 0 and prevent it from spreading away from the base of the projecting portion 9 when subjected to pressure-in the die. I thus cause the thimble to be made perfectly true and filled out at its inner edge. The surplus stock will expand and spread out between the flat face of the plunger and die, and the circular fin thus produced is to be removed inthe subsequent process of finishing the thimble. In the ordinary process ofmanufacturing thimbles theoup O is first formed, and is then struck up, as in Fig. 5, with a thinned upper edge, which is subsequently turned over in a die, as shown in Fig. 4, and the rim thus formed is then turned down upon the body of the thimble in a lathe.
My improved process thus saves a number of operations, and the thimbles so formed are also more durable than those of the old style, which are liable to become worn through at the rim, while the point of the thimble is still serviceable.
1 claim as my invention- The improvement in the art of making thimbles, consisting in first producing-a cup-shaped blank by drawing or otherwise, then upsetting the end portion of the blank, and simultaneously forcing the surplus metal outward at the edge, and tin-ally cutting off the outwardlyforced portions of said edge, leaving the thimble with a thickened rim, substantially as described.
WILLIAM D. WHITING.
Witnesses:
H. S. BABCOCK, SOGRATES SGHOLFIELD.
US273924D Manufacture of sewing-thimbles Expired - Lifetime US273924A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877546A (en) * 1953-06-09 1959-03-17 Motor Wheel Corp Method for forming tubular metal articles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877546A (en) * 1953-06-09 1959-03-17 Motor Wheel Corp Method for forming tubular metal articles

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