An Improved Method of Manufacturing Spinning Rings from Sheet Metal.
Year: 1895

page_text: Date of Application, 8th Jan., 1895-Accepted, 16th Feb., 1895
COMPLETE SPECIFICATION.
An Improved Method of Manufacturing Spinning Rings from
Sheet Metal.
1, MERRICK DAVID MARCY, Manufacturer of Mill Supplies, residing at
Worcester, in the County of Worcester, and State of Massachusetts, one of the
United States of America, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, reference being had to the accompanying
sheet of drawings and to the letters and figures marked thereon, that is to say :-
Fig. 1 represents a circular disk of sheet-metal from which the ring is made.
Fig. 2 represents, in central, sectional view, the cup-shaped form into which the
disk is drawn by the action of a die-press with the sheet metal forming the sides of
the cup, reduced in thickness and having a fillet in the corner between the side and
bottom of the cup, and with the bottom of the cup made slightly crowning for the
purpose hereinafter described.
Fig. 3 represents, in central, sectional view, the punch and die by which the first
operation is performed upon the cup-shaped blank which is also shown in said Fig. 2,
in central, sectional view, and in the shape which it assumes when first acted upon
by the punch and die.
Fig. 4 represents the same punch and die and cup-shaped blank, all in central,
sectional view, as represented in Fig. 3, but at the end of the action of the punchi
and die.
Fig. 5 represents a punch and die by which a disk is cut from the central part of
the bottom of the cup-shaped blank forming a ring with vertical walls having
exterior and interior flanges at one edge.
Fig. 6 represents, in central, sectional view, the same punch and die as shown in
Figs. 3 and 4, said figure illustrating the next succeeding step in my improved
process by which the flanges of the ring are reduced in thickness and increased in
width..
Fig. 7 represents, in central, sectional view, the ring as removed from the die
shown in Fig. 6, the broken lines 1, 1 and 2, 2, in said Fig. 7 indicating the
dimensions by which the flanges of the ring are trimmed by the action of a die-press
in the usual and well known manner.
Fig. 8 represents, in central, sectional view, the punch and die with the ring held
therein by which the base of the ring is expanded.
Fig. 9 represents a pair of beaded rolls by which the bead is formed
base of the ring in lieu of the expanded base, as shown in Fig. 8, and
upon the
Fig. 10 is a view of the completed ring having a beaded base as formed by
the rolls represented in Fig. 9, one-half of the ring being shown in central,
sectional view.
Similar letters refer. to similar parts in the different. figures.
+
My improved method of making a spinning-ring from sheet-metal is as
follows:-
A circular blank A, Fig. 1, is cut from sheet metal and drawn by means of
appropriate dies into the cup-shaped form represented at B, Fig. 2, in which the
botton B is of the same thickness as the sheet-metal blank A, but the vertical
sides, B2, are reduced in thickness. by the action of the punch and die by
which the blank is stamped into its cup-shaped form in the usual and well known
manner.
*:
The punch, or male die by which the interior of the cup is formed, being

page_text: chamfered at its end, so as to form a fillet B³, between the bottom, B', and the
vertical sides, B³. The punch and die are also suitably shaped, to form the
bottom B', slightly convex, or crowning, so as to bring the bottom, B', slightly
above the plane indicated by the broken line B, B4, which passes through the upper
edge of the fillet B³. I prefer to raise the bottom out of the plane, B, B4, by
making the bottom convex or crowning, at an annular section, B6, near the edge of
the bottom, leaving the central section, B of the bottom flat or substantially
parallel with the plane B, B', as represented in Fig. 2.
The cup-shaped blank formed as above described and as represented in sectional
view in Fig. 2, is then operated upon by a punch and die, which are shown in
central, sectional view in Fig. 3, in which C denotes the die provided with an
annular channel C₁, fitted to receive the vertical wall or sides B2 of the cup-shaped
blank.
The depth of the channel C¹ is equal to the distance from the lower edge B' to
the lower edge of the fillet B* so that when the cup-shaped blank is placed
in. position in the die C, its lower edge B will rest upon the bottom of the
annular channel C', and the sides of the annular channel will inclose the vertical
wall B of the cup-shaped blank from its lower edge, B', to the point where its
thickness begins to increase in order to form the fillet B³.
D denotes a reciprocating punch having a plain face D', parallel with the face of
the die C.
The cup-shaped blank, B, is placed in position within the annular recess C', of
the die C, and the face D' of the reciprocating punch is brought down upon the
bottom B, and in contact with the central section B of the cup-shaped bottom as
indicated in Fig. 2, where the broken line D2 indicates the position of the face of
the punch D. The downward motion of the punch D is continued, flattening the
crown-shaped bottom B', as represented in Fig. 3, thereby expanding or crowding
outward the upper, or filleted, edge of the vertical wall, or side, B; the convexity
or crowning of the bottom B' being just sufficient when flattened, to cause the
filleted edge of the vertical wall B2, to be crowded over just far enough to bring
the filleted edge symmetrical with the wall or side B2; that is, so the metal forming
the body of the fillet shall overhang equally upon both sides of the vertical planes,
bounding the sides of the wall B, when the face of the punch has been brought into
contact with the entire extent of the bottom B'.
The downward movement of the punch D, is still further continued, bringing it
into the position represented in Fig. 4, upsetting the metal forming the filleted
edge into the body of the bottom, and expanding the same laterally to form the
exterior flange E, said exterior flange E and bottom B₁ still retaining the same
thickness as the original bottom of the cup-shaped blank represented in Fig. 2.
A circular disk is next cut from the bottom B, by means of a punch and die, as
represented in Fig. 5, where F denotes a die having a central hole F1, and a
concentric, annular recess F³, to receive the vertical wall or side B2, and hold it
concentrically with the central hole F¹, and with the bottom of the blank lying in
contact with the face Fs of the die. A reciprocating, circular punch, G, is then
employed in the usual manner to cut a circular disk from the centre of the bottom,
leaving an interior flange H. The ring is then transferred back to die C, to be
acted upon by the reciprocating punch D, to which a downward movement is given
sufficient to compress the flanges E and H, and reduce them in thickness by a lateral
expansion as represented in Fig. 6, forming a ring, which is shown, removed from
the dies, and in central, sectional view in Fig. 7.
The edges of the flanges E and H are then trimmed by suitable dies in the usual
and well known mauner on the broken lines, 1, 1 and 2, 2, Fig. 7, making the
Hanges E and H of the desired width and with their edges concentric with the
vertical wall or side B2, and forming a suitable track for a ring traveller.
The vertical wall or side B2 forms the base of the ring which is adapted to
rest upon, or be attached in any of the well known methods, to the rail of a
spinning-frame.

page_text: Fig. 8 shows a method by which the base of the ring is expanded or made into
flaring shape, and Fig. 9 shows a method by which a bead I can be formed in the
base of the ring to rest upon the upper surface of the rail when the lower edge of
the base is inserted within the hole in the rail; the broken lines J, J, Fig. 10,
denoting the upper surface of the rail, and said Fig. 10 representing, partly in
elevation and partly in central, sectional view, one of my completed rings, with a
head I formed in the base. The processes illustrated in Figs. 8 and 9 of the
accompanying drawings, form no part of my present invention, but are represented
in order to illustrate the complete process from 'the cup-shaped blank to the
completed ring.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed; 1 declare that what I
claim is :-
The within described method of forming a spinning-ring from sheet metal, and
consisting
First. In forming a cup-shaped blank having a side, B2, and a bottom B', thicker
than said side, said bottom being crowning or convex in an annular section, and
baving a flattened, central section, said cup-shaped blank having a fillet B³ upon
its inner side by which the side, B2, is thickened next said bottom.
Second. Expanding the thick portion of the side B2, by a pressure applied to
flatten the crowning or convex portion of said bottom, in order to bring the thick,
or filleted edge, B symmetrical with the side B².
Third. Upsetting the thick, or filleted edge, B³, to form an exterior flange E,
and of the same thickness as the bottom B¹.
Fourth. Removing the centre of said bottom to form an interior flange H,
adapted with said exterior flange E, to form a track for a ring-traveller,
substantially as described.
Dated this 24th day of December A.D. 1894.
MERRICK DAVID MARCY,
115, Cannon Street, London.