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To all whom it may concern: Be
it known that I, GEORGE W. WEYMAN,
a citizen of the United States, residing in the city and county of
Philadelphia, State of Pennsylvania, have invented a new and useful
Improvement in Presses for the manufacture of Insulators and other Glass
Articles, which improvement is fully set forth in the following
specification and accompanying drawings, in which-- Figure
1 represents a side elevation, partly sectional, of an apparatus for
manufacturing insulators, and other glass articles embodying my
invention. Fig. 2
represents a side elevation of detached portion thereof. Similar
letters of reference indicate corresponding parts in the two figures. My
invention consists of a threaded die adapted to be introduced into a
mold, whereby the shaped article may be internally threaded, and a
holder for supporting the glass while being shaped and removing the
shaped article, said holder being of annular form and located within the
mold, the opening of the holder permitting the passage of the threaded
die in its advancing and returning motions. Preferring
to the drawings, A represents the flume of a glass-press, and B the
plunger thereof, which latter is connected with the shaft or stem C. D
represents a lever for lowering the plunger, and E represents a spring
for returning the same. The
shaft C has its bearings on the swinging piece A' of the frame A,
whereby the plunger may be moved laterally from the mold. F
represents the table of the frame, the same having an opening, a,
through which is passed a stem or shaft, G, a portion of which is
threaded and engages with the threaded cross piece b of a hanger, H, the
latter depending from the table F. Encircling the shaft G is a bevel-wheel, J, which is
connected with said shaft by a feather, whereby said shaft may rotate
and rise and fall, said wheel being mounted on the hanger H. Geared with the wheel J is a gear-wheel, J', to which power is
communicated by a crank wheel
or handle-- but other means may be employed-- the shaft of said wheel
being mounted on the frame of the machine or the hangers H H’ as
shown. Supported
on the table F is the mold K, which is formed of sections which may be
opened, and has its face of the form of the sides of an insulator, it
being noticed that the working face of the plunger is of the form of the
top of an insulator. Within
the mold is a holder, L, which rests in a recess therein, and has a
handle, L', the shank of which rests in grooves in the sections of the
mold, the grasping portion of the handle being outside of the mold, said
bolder being of the form of the base of an insulator and portion of the
interior thereof. To the upper end of the shaft G is secured a screw-shaped die, M, the same being adapted to form the thread or the interior of an insulator, and it passes through the holder L, which, as will be seen, is of annular form. |
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The
operation is as follows: When the die M is elevated and the mold closed,
the plunger being moved from the top of the latter, the glass placed in
the mold envelops part of the side of the holder L and the threads of
the die M. The plunger is
then returned over the mold and lowered, so that the glass is properly
pressed and receives the shape of the insulator, with a thread on the
interior thereof, as above referred to.
The shaft of the gearing is then rotated, so that the die M
descends and leaves the shaped glass, and the plunger is permitted or
caused to rise. The mold is now opened and the holder withdrawn, thus
removing the insulator which rested on the holder within the mold.
The holder is then restored to its operative position, the mold
closed, and the die elevated, and the operations of forming another
insulator may be repeated. As
the mold rests loosely on the table, it will rise during the unscrewing
operation of the die M, due to differences in the pitch of the thread of
said die and that of the shaft G. The
table is provided with suitable gages, c, for uniformly locating the
mold thereon. As the holder L is of annular form, as described,
it permits the screw-die to pass through the same in its
advancing and returning motions. Again the upper portions of the holder is of less external
diameter than the lower face of the plunger, and thus the holder acts in
connection with the screw-die to shape the insulator or article pressed. Having
thus described my invention, what I claim as new, and desire to secure
by Letters Patent, is-- 1.
In a glass-press, a mold, a plunger, and a rising and falling shaft
having a die, in combination with a holder of the form of an annulus,
removably fitted within the mold, substantially as and for the purpose
set forth. 2.
In a glass-press, a mold, a plunger, and a rising and falling shaft
having a screw-shaped die, in combination with a holder in the form of
an annulus, fitted within the mold and provided with a handle, whereby
the article, when formed. May be removed from the mold by said holder,
substantially as and for the purpose set forth. 3.
In a glass press, a rising and falling shaft carrying a screw-die on one
end, in combination with a plunger and a detachable holder, said holder
being annular in form, and having an upper portion of less external
diameter than the lower face of the plunger, whereby said holder acts in
connection with the said die in shaping the article pressed,
substantially as and for the purpose set forth. 4.
A screw shaped die and means for rotating and raising and lowering the
same, a mold, a detachable holder within the mold, and a plunger,
combined and operating substantially as and for the purpose set forth.
GEORGE W. WEYMAN. Witnesses: JOHN
A. WIEDERSHEIM, JNO. K. PLITT. |