improvements relating to the Formation of, Rims, or Flanges on Sheet Metal and Apparatus therefor, Chiefly Designed for the Manufacture of Watch Cases.
Year: 1885

page_text: improvements relating to the Formation of, Rims, or Flanges on
Sheet Metal and Apparatus therefor, Chiefly Designed for
the Manufacture of Watch Cases.
T
1
I, CYPRIEN CHABOT of N° 1157 South Fifteenth Street in the City of Philadelphia,
State of, Pennsylvania, in the United States of America, Machinist do hereby
declare the nature of my invention for "IMPROVEMENTS RELATING TO THE FORMA-
TION OF RIMS OR FLANGES ON SHEET METAL AND APPARATUS THEREFOR, CHIEFLY'
DESIGNED FOR THE MANUFACTURE OF WATCH CASES 13 to be as follows:-
My invention relates to the formation on the edges of watch cases or other sheet
metal plates of the usual flat faced, inwardly projecting and internally bevelled
rims or clips; and to apparatus therefor.
In carrying my said invention into practice in connection with a watch case,
I strike up the edge of the sheet metal and then form on this struck up edge an
internal bead. This bead is next compressed externally and internally preferably
by means of rollers in order to produce an inwardly projecting and internally
bevelled rim having a flat outer face.
To form the internally beaded edge I employ dies. The lower die is recessed
and the upper die is tubular and has an internal plunger which is free to slide in
the die to an extent limited by a stop pin and groove. This plunger is acted upon
by a spring which tends to depress or force it out of the upper die, the latter
having in its lower edge an annular recess which receives the head of the plunger.
The watch-case, after having been struck up or stamped into dish form in a
separate press, is placed in the recess of the lower die, and the upper die is forced
downwards. The first effect of this movement is to bring the projecting plunger
into contact with the case, which is thereby firmly clamped to the bed, the
plunger sliding within the upper die as the latter continues to move downward.
When the upper plunger has moved low enough the upturned and projecting
edge of the case is acted upon by a groove in the upper die, whereby the said
edge is bent inward and downward to form the bead.
The machine for compressing this beaded edge to form the internally bevelled
rim comprises a suitable bed upon which are mounted a head-stock and a tail-stock
similar to those of a lathe. The head-stock has a recessed chuck and the tail-stock
projecting stem on the end of which is fitted, so as to revolve freely, the tubular
tem of a disc.

page_text: To the bed is bolted a plate, and longitudinally guided on the latter is a slide
which can be reciprocated by means of a lever and link. Transversely guided on
the said slide is a second slide which is reciprocated by means of a lever pivotted
to a stud on the first slide and having a slot for the reception of a pin on the
second slide. The front end of the second slide carrics two spindles at right angles
to each other; one spindle carries a disc having a flat periphery, and the other
spindle a disc the periphery of which is bevelled. The spindles may turn in the
second slide, or the discs may turn on the spindles as may be most convenient.
The spindle having the bevelled disc is free to move in the second slide to an
'extent limited in one direction by the plain disc and in the opposite direction by a
collar on its spindle.
The operation of this device is as follows, that is to say: The case with its
beaded edge is applied to the recessed chuck and clamped therein by the disc on
the tail stock. The second slide is then advanced and the first slide is retracted
so as to bring the discs into the proper relation to the beaded edge of the case.
The chuck being caused to revolve, the slides are moved so as to bring the disc
having the flat periphery into contact with the face of the outer bead, thereby
flattening the same, while the movement of the second slide causes the edge of
the bevelled disc to act on the inner edge of the bead, thus compressing and
shaping the same into the bevelled rim.
-
A set screw on the said plate acts as a stop for the first slide and a set screw
on this slide serves to stop the second slide, so that undue pressure cannot be
brought to bear upon the beaded edge of the case in the formation of the
bevelled rim.
The bevelled disc is however, free to yield slightly in the direction of the length
of its spindle to accommodate inequalities in the thickness of the metal or size of
the bead presented to be operated upon. The outward pressure of the bevelled
disc against the rim is effected preferably by contact of the inner bevelled edge of
said disc with the inside of the watch case.

page_text: Improvements relating to the Formation of Rims or Flanges on
Sheet Metal and Apparatus therefor, Chiefly Designed for
the Manufacture of Watch-cases.
I, CYPRIEN CHABOT, of No 1157 South Fifteenth Street in the City of
Philadelphia, State of Pennsylvania in the United States of America, Machinist
do hereby declare the nature of my invention for IMPROVEMENTS RELATING TO
"
THE FORMATION OF RIMS OR FLANGES ON SHEET METAL, AND APPARATUS THERE-
FOR, CHIEFLY DESIGNED FOR THE MANUFACTURE OF WATCH-CASES " and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention relates to the formation of rims or flanges on the edges of
sheet-metal, and to apparatus therefor.
The said invention is especially designed for rapidly forming on the edges of
watch-case backs the usual flat-faced and internally bevelled rims or "clips," and
this object is attained in the manner hereinafter set forth.
In the accompanying drawing,
Figure 1 is a sectional view, drawn to an enlarged scale, of a watch-case back
upon which a rim or clip is to be formed.
Figure 2 is a similar view shewing the first step in the process of forming
the rim.
Figure 3 is a similar sectional view of a case having a finished rim.
Figure 4 is a sectional view of a portion of a press for the preliminary preparation
of the back, by forming thereon a beaded edge.
Figure 5 is a plan view, partly in section, of the device for completing the
formation of the rim.
Figure 6 is a front view of the same.
Figure 7 is an end view looking in the direction of the arrow Figure 5, the
spindle of the clamping disc being shewn in section, and
Figures 8 and 9 are views, drawn to an enlarged scale, illustrating the operation
of the device.
In carrying my said invention into practice, I first form on the edge of the sheet
metal case w, which is struck up as shewn in Figure 1, an internal bead x, as shewn
in Figure 2, and I then compress this bead a externally and internally in order to
reduce it to the condition of an internally bevelled rim y, having a flat outer face
as shewn in Figure 3.
To form the internal bead x, I use the press shewn in Figure 4, in which
A represents the recessed lower die, and B the upper die. The latter is tubular
and has an internal plunger B¹ which is free to slide in the die to an extent limited
by a stop-pin a and a groove a¹. The said plunger is acted upon by a spring 6,

page_text: which tends to depress or force it out of the die B, the latter having in its lower
edge an annular recess d.
The watch-case, struck up into dish-form as shewn in Figure 1, in a separate
press, is placed in the recess of the lower die, and the upper die is forced
downwards. The first effect of this movement is to bring the plunger B¹ into
contact with the case, which is thereby firmly clamped to the bed. As the upper
die continues to move downward, it slides upon the plunger B¹, until the up-
turned and projecting edge of the case is finally acted upon by the groove d
of the die, whereby the said edge is bent inward, and downward to form
the bead x
The machine for compressing this beaded edge to form the internally bevelled
rim, is shewn in Figures 5, 6 and 7, in which D indicates the bed of a lathe, E the
head-stock and E' the tail-stock. The head-stock has a recessed chuck e and the
tail-stock a projecting stem e¹, on the end of which is fitted so as to revolve freely,
the tubular stem of a disc f.
To the bed of the lathe is bolted a plate F, upon which is arranged a slide G,
adapted to be reciprocated longitudinally by means of a lever g and link g¹. Upon
the slide G is a second slide H which is reciprocated by means of a lever h, pivotted
to a stud on the slide G, and having a slot for the reception of a pin i on the
slide H.
.
The front end of the slide H carries two spindles m and n at right angles to
each other. The spindle m carries a disc m, having a flat periphery; and the
spindle n carries a disc N, the periphery of which is bevelled. The spindles
may turn in the slide H, or the discs may turn on the spindles, as may be most
convenient.
The spindle n is free to move in the slide H to an extent limited in one direction
by the disc N, and in the opposite direction by a collar p on the spindle.
The operation of this device is as follows, that is to say, the case with its beaded
edge is applied to the recessed chuck and clamped therein by the disc f. The
slide H is then advanced and the slide G is retracted so as to bring the discs M
and N into the positions shewn in Figure 8, relatively to the beaded edge of the
case. The chuck being caused to revolve, the slides are moved in the direction of
the arrows in Figure 5, the movement of the slide G bringing the flat periphery of
the disc M into contact with the face of the outer bead x, thereby flattening the
same; while the movement of the slide H causes the bevelled edge of the disc N
to act on the inner edge of the bead, thus compressing and shaping the same into
the bevelled rim y shewn in Figures 3 and 9.
A set-screw Q on the plate Facts as a stop for the slide G, and a set-screw P on
this slide serves to stop the slide H, so that undue pressure cannot be brought to
bear upon the beaded edge of the case in the formation of the bevelled rim. The
disc N is, however, free to yield slightly in the direction of the length of its spindle,
to accommodate itself to inequalities in the thickness of the metal or size of the
bead presented to be operated upon. The outward pressure of the disc N against
the rim y is effected preferably by the contact of the inner bevelled edge of the said
disc with the inside of the watch-case, as in Figure 9.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
First. The method herein described of forming an inwardly projecting bevelled
rim or flange on a watch-case back or other sheet-metal plate, the said method
consisting in first forming an internal bead on the edge of the plate, and then
flattening the outer face and compressing the inner face of the said bead while the
plate is being rotated, as set forth.
Second. The method herein described of forming an inwardly projecting bevelled
rim or flange on a watch-case back or other sheet-metal plate, the said method

page_text: consisting in first forming an internal bead on the edge of the plate, and then
rolling the inner and outer faces of the said bead, so as to flatten the said.outer
face and press out the inner face, as set forth.
Third. The combination of the plate-holding chuck e with a slide H, movable in
relation thereto, and carrying a presser or disc M having a flat face, and a presser
or disc N having a bevelled face, as set forth.
Fourth. The combination of a plate-holding chuck, with a flat-faced disc M and a
bevelled disc N, and with a carrier whereby the said discs are held at right angles,
as specified.
•
Fifth. The combination of the plate-holding chuck, the discs M and N, the.
slide H carrying the same, and the slide G carrying the slide H, as set forth.
Sixth. The combination of the plate-holding chuck, the facing disc M, the
bevelled pressing disc N, and a carrier in which the said disc N is free to yield, as
set forth.