Method of Making Spinning Rings from Sheet Metal.
Year: 1894

page_text: Date of Application, 30th July, 1894-Accepted, 22nd Sept.,
1894
COMPLETE SPECIFICATION.
Method of Making Spinning Rings from Sheet Metal.
I. MERRICK DAVID MARCY, Manufacturer of Mill Supplies, residing at
Worcester, in the County of Worcester, and State of Massachusetts, 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 ascertained in and by
the following statement :-
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 in the usual and well-known manner, and
having 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.
Fig. 3 represents a ring formed by removing the bottom of the cup, which is
shown in Fig. 2; said ring having the vertical sides with its upper edge thicker
than the sides and having the excess of metal contained in the thick edge over-
hanging upon the inner side of the ring.
Fig. 4 represents a die with the ring, as represented in Fig. 3, held therein, and
the tapering punch by which the operation of expanding the thick edge of the ring
outward is performed; the punch, die and crowding ring being shown in central
sectional view.
Fig. 5 represents, in central sectional view, the several parts represented in Fig. 4,
shown in position when the operation of expanding the thick end of the ring has
been accomplished.
Fig. 6 represents, in central sectional view, the ring as left by the operation of
the punch and die shown in Fig. 5, and the die and punch by which the next
operation of upsetting the thick edge of the ring is performed.
Fig. 7 represents the same parts, as shown in Fig. 6 after the thick edge of the
ring has been upset into an internal and external flange suitable to form the track
for the traveller, and
Fig. 8 is a view of the completed ring with one-half of the ring 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 ato B, Fig. 2, in which the
bottom B' is of the same thickness as the sheet metal blank A, but the vertical
sides B 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 chamfered
at its end so as to form a fillet B³ between the bottom B' and the vertical
sides B².
When the sheet metal blank has been stamped into the cup-shaped form
represented in Fig. 2, having the thick bottom B¹, reduced sides B and fillet B³,
the bottom B' is cut out on the broken lines 11, 1 1, Fig. 2, forming a ring-shaped
blank B', from which the spinning ring is made.
The operation of cutting the circular blank from sheet metal, stamping it into a
cup-shaped blank B', represented in Fig. 3, will be readily understood by those

page_text: conversant with the art of working sheet metal in a die-press, and I have not, there-
fore, described them in detail; my improved method being with an annular blank B*,
represented in sectional view in Fig. 3, and consisting of a band or ring formed of
the sides B2, having its edge C thicker than the side B2, aud made to overhang
upon the inside of the ring, and the first step in making a spinning ring from an
annular blank, as shown in Fig. 3, consists in the expansion of the upper or thick
edge C, so as to bring it symmetrical with the vertical walls forming the sides of
the ring, that is, with the excess in the thickness of the edge C, overhanging
equally upon both the outer and inner sides of the ring, so that a line passing
through the centre of the side B³, and parallel with the axis of the ring will also
pass through the centre of the thick edge C.
The operation of expanding the end of the ring is accomplished by means of a
reciprocating punch E, and a die D, such as are represented in sectional view in
Fig. 4, the die D having a circular recess D¹ whose diameter equals, the outer
diameter of the annular blank B, and whose depth equals the distance from the
lower edge B of the annular blank to the lower edge of the fillet B3; the object
of the die D being to form a support to the outside of the annular blank at a point
just below the plane of the fillet B³.
The reciprocating punch E, having its lower end tapering as at E', is brought
down within the thick edge C of the annular blank which projects above the face
of the die D, causing the edge C of the annular blank to be expanded or bent
outward, as represented in Fig. 5, so that the centre line of the side B2 will be
coincident with the centre line of the thick edge C, as indicated by the broken
line 2 2, Fig. 5.
The amount of expansion necessary to bring the edge (symmetrical with the
sides of the ring is determined by the inclination of the end E¹ of the punch and
the extent of its downward movement.
When the thick edge C of the ring has been expanded so the ends of the metal
will overhang the sides B2 equally upon the outer and inner side, the annular blank
is then placed within an annular channel or groove F¹, formed in a die F, the depth
of the groove F¹ being as great as the side B, so that the die F will allow no part
of the thin side B to project above the face of the die, which would render the
ring liable to buckle when the edge C is upset into the flanged track for the
traveller.
Pressure is applied to the edge C of the ring in a line parallel with its axis, by
means of a punch G by which the edge C is compressed or upset into a flange
extending equally upon both sides of the ring and forming the outer flange H, and
the inner flange H¹.
The edges of the flanges H and H' are trimmed concentrically with the axis of
the ring; the lower edge of the side B² is then expanded and trimmed if necessary ;
the ring is then polished to form a suitable track for the traveller.
1 do not confine myself to the use of an annular blank having its thick edge
overhanging upon the inner side, as it may be made to overhang upon the outer
side of the ring; neither do I confine myself to the specific form of punch and die
as shown.
Having now particularly described and ascertained the nature of said inven-
tion, and in what manner the same is to be performed; I declare that what I
claim is :-
The within described method of forming a spinning ring from sheet metal, and
consisting, (1) in forming an annular blank having sides B and a thick edge C
formed by a fillet B³ overhanging upon the inner side of the blank; (2) expanding
the thick edge of the annular blank by lateral pressure applied to the inside and
without upsetting the same, whereby the thick edge of the blank is brought
symmetrical with the side walls of the blank; (3) upsetting the thick edge of the
blank by a pressure applied parallel with its axis, while the vertical walls of said
blank are supported by a die provided with an annular channel fitting said walls,

page_text: whereby the thick edge of the blank is formed into an outer and inner flange
adapted to form the track for a ring traveller, substantially as described.
In witness whereof I, the said Merrick David Marcy, have hereunto set my
hand and seal this Nineteenth day of July A.D. 1894.
MERRICK DAVID MARCY.
In the presence of:
FRANK MERRICK MARCY.
ALBERT A. BARKER.
W. H. Beck,
115, Cannon Street, London, E.C.,
Consulting Engineer and Patent Agent.