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To all whom it may concern: Be
it known that we, RALPH G. HEMINGRAY
and CHARLES HAWK, citizens
of the Our invention relates to a press for forming insulators,
in which a screw, to form the thread, is impressed in the molten glass
at the time that the insulator is formed in the mold, and in which,
after the glass has sufficiently hardened by cooling, the mold
containing the insulator with the screw inserted in it, is presented to
a rotary spindle, by means of which it is screwed out of, and withdrawn
from, the hot glass, leaving the threads properly formed within the
insulator. Prior to our
invention it has been necessary to employ one operative in the use of
such a machine, to insert a fresh screw in the plunger at each operation
of the same. The object of our invention is to do away with such
operative, and to this end we have devised for a machine of the class
described, an automatic attachment which supports a series of screws in
position ready for use in the vicinity of the plunger, and which
successively places a fresh screw in position in the plunger, after each
operation. In
carrying out our invention we make use or a stationary plate which
supports a number of the screws, and of an intermittently rotating ring,
having sockets which determine the position of said screws with
reference to the receiving and placing mechanism; and of an oscillating,
socketed arm which alternately comes into position below a notch in said
supporting plate to receive one of the screws as the said ring is
intermittently operated to bring a screw above said notch, and then
oscillates back into position below the plunger, said socketed arm
having within it a screw supporting trigger, which is at the proper time
struck so as to raise the screw into position to be received and held by
the plunger. Suitable cams
and pawls, supported and operated by the plunger and table, give proper
movement to the parts as above described. In the drawings:- Figure 1 is a perspective
view of a screw press for forming insulators to which our improvement is
attached; Fig. 2 is a front elevation of that portion of the machine
above the rotating table; Fig. 3 is an elevation of the same mechanism
looked at from the right of Fig. 2; Fig. 4 is a partial horizontal
section on an enlarged scale on the lines 4-4 of Fig. 2; Figs 5 and 6
are elevations at the limits of movement of one of the operating cams to
be referred to later; Fig. 7 is a vertical section through the socketed
arm which receives and delivers the screws to the plunger; Fig. 8 is an
elevation of the supporting plate and intermittently rotating ring with
the cam and arm operating the same; Fig. 9 is a vertical section through
Fig. 8 in a plane parallel to the paper; and Fig. 10 is a detail view,
looked at from the under side, of the mechanism operating the
intermittently rotating disk, with the lower retaining plate left off. The
general features of the machine itself need no particular description as
it is of the usual type, well known to the art and more particularly
described in the patent to Kribs, #532,973 granted January 22nd, l895. Briefly,
such a press comprises a supporting framework A, a rotatable,
mold-carrying table B, a depressible plunger C, an arm for operating the
same, D, and a balanced rotatable spindle E.
At the lower end of the plunger C is a socket c adapted, upon the
insertion of the shank of one of the screws C’ to receive and hold it.
The rotatable spindle E has any usual socketed shank e with mechanism
contained therein to release the screw shank after it has withdrawn the
screw from the insulator in the mold. F
is the supporting plate, and G the intermittently rotating socketed
ring, which together support the screws; and J is the oscillating arm
which receives the screw from the supporting plate and ring F, G, and
delivers it to the socketed shank c in the plunger C. The plate F is
provided with an extension F' by means of which it is secured in any
convenient manner to the vertical rod E' which supports the rotary
spindle E (see Figs. 3,4,8 and 9). G is the socketed ring, which is rotatably supported on the plate F. It
has a web G' at the bottom and a downwardly projecting shank G" by
means of which it is journaled to the plate F. Plates g, g', are loosely
journaled
on the shank G" and between them is a ratchet g" keyed to the
shank G". The parts are secured together by means of a nut and
washer, or in any other suitable manner. The ring G is provided with a
series of sockets G4 of a size to receive the screws C' and adjacent
each of these sockets the outer vertical face of the ring is cut out as
indicated at G’’’ for a purpose that will become presently
apparent. The
oscillating arm J is rotatably supported in any convenient manner upon
the upright rod C" which forms one of the guides for the plunger
frame, and as illustrated, upon that one nearest the center of the table
(see Figs. 1, 2, 4 and 7). This arm, J, as shown is cast in sections
adapted to be screwed or bolted together, and said sections are of such
shape, that when properly secured together, there is formed at one end a
bearing j, which embraces the rod C"; at the other end, a socket
j', of a size to receive loosely one of the screws; and between the two,
a slot j' of substantially the depth of the arm itself, opening into the
socket J'. A trigger
J" is pivoted in the slot j'.
One end K, normally rests in the path of a series of cams K”
which are supported from the table B. The ends of this trigger are
preferably provided with rollers to reduce friction and to facilitate
its operation. A
cam-plate L is bolted to one side of the yoke L', which guides the
plunger. This cam-plate is
curved (see Figs. 2, 5 and 6), and is provided with a cam groove l, into
which projects a pin l' secured to the bearing j of the arm J. This pin
is preferably provided with an anti-friction roller. The slot l is of such shape that, as the plunger descends,
and with it the cam-plate L, the engagement of the pin l' with the
cam-groove l, causes the arm J to oscillate about the rod C" as an
axis, until it comes into position under a notched-out portion L"
in the plate F. The return movement of the plunger of course causes a
reverse movement of the arm J so as to bring it back into its position
immediately under the plunger itself. M is another cam-plate (see Figs. 2, 3, 8 and 10) which serves to intermittently rotate the socketed ring G, so as to bring one of the sockets above the notched-out portion L" in the plate F at each operation of the plunger. This cam is secured to a horizontal arm M’ (see Fig. 8), which is pivoted at one end to the plates g, g', and near its other end rides on a flanged roller m, secured to the rod E'. A spring controlled pawl m" is journaled between the plates g, g', in position to engage the ratchet g". A back-ratchet m’’’ opposite the pawl m" prevents back movement of the ratchet. The cam plate M is provided with the cam-slot M" in which works a pin M’’’ secured to the yoke L' (see Figs. 2, 3 and 8). As the yoke descends, the movement
of the pin M’’’ the cam slot M” causes the bar J' to rotate the
plates g, g', and with them the pawl m", so as to move the ring G
one notch. Upon the rise of the plunger the parts are taken back into
their first position ready to rotate the ring at the next operation. The operation of our improvement is apparent from this description. A number of screws are placed in the socketed ring G, the number being determined by the rapidity with which they cool, it being understood of course, that this number be not so large that when a screw reaches the position where it will be taken by the oscillating arm J, and delivered to the plunger, it has become too cold. Starting with the apparatus in the position where a fresh screw has been delivered to the plunger, and a mold, previously filled with molten glass, has been brought into position beneath the plunger. It is |
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hardly a correct description of the Kribs patented machine, referred to
in the specification to say that an "empty" mold is brought
under the plunger. It is empty in that no screw has been put in to it
but it contains the glass which has been placed in it by the gatherer
just before it reaches the position under the plunger. The arm D is
depressed, which causes the depression of the plunger C thus embedding
the screw C' in the molten glass. As
the plunger descends, the cam-plates L and M are brought into play, so
that the arm J is rotated out of its position beneath the plunger and
out of the path of the descending screw into a position under the notch
L" in the plate F, while at the same time the socketed ring G is
rotated in time to bring a fresh screw into position above said notch
L", so that when said arm I has been brought beneath the notch, a
screw will fall into the socket J', coming to rest at the forward end of
the trigger J”. The reverse movement of the arm D raises the, plunger
C, the screw being released and left embedded in the glass in the mold
thus causing the rotation of the arm J back into its position under the
plunger, carrying in its socket J' a fresh screw.
The table B is then rotated so as to bring a fresh mold under the
plunger and this rotation of the table brings one of the cams K” into
engagement with the rear end of the trigger K', thus forcing the screw
carried by its forward end up into the socket c of the plunger C. After
the cam K" has passed the trigger drops into its normal position.
The next descent of the plunger rotates the arm J as before into
position under the plate F, and causes the ring G to bring a fresh screw
above it, so as to drop into the socket, and so on, the operation being
repeated at each depression of the plunger, and rotation of the table to
bring a fresh mold under the plunger. The molds containing
the hot glass and the embedded screws, by the intermittent rotation of
the table, are successively brought into position under the balanced
rotatable spindle E. By the time this position is reached, the glass is
sufficiently cooled to remove the screws, and as each mold is brought
into this position, an operative depresses the spindle to engage and
grasp the upwardly projecting shank of the screw, and then rotates the
spindle to withdraw the screw in the usual manner, thus completing the
formation of the thread in the insulator. The screw itself is then
placed in a socket of the ring G, ready to be used again when its turn
comes. We
have shown and described herein a particular mechanism to carry out our
invention, but of course do not wish to be limited to the mechanical
details thereof, as it is apparent that they may be modified and changed
without departing from the spirit of our invention. Having
thus described our invention, what we desire to claim as new, and to
cover by betters Patent, is:-- 1.
In a machine of the class described, a support adjacent the plunger, an
arm adapted to oscillate between such support and said plunger, and
mechanism operated by said plunger adapted to trip said Support, and to
oscillate said arm. 2.
In a machine of the class described, a supporting member located
adjacent the plunger and a delivering member adopted to receive a screw
from the supporting member and deliver it to the plunger at each
operation of the same. 3.
In a machine of the class described, in combination with the plunger, a
support for a series of screws adjacent the plunger, and automatic
mechanism adapted to receive one of the screws from said support and
deliver it to the plunger at each operation of the same. 4.
In a machine of the class described, in combination with the plunger, a
supporting member adapted to release the screws in succession one at a
time, and a delivery member moving between said supporting member and
said plunger, adapted to receive and deliver to the plunger a fresh
screw at each operation of said plunger. 5.
In a machine of the class described, in combination with the plunger, a
supporting member adapted to release the screws in succession. One at a
time, a delivery member moving between said supporting member and said
plunger, adapted to receive and deliver to the plunger a fresh screw at
each operation of said plunger, and mechanism to produce the automatic
movement of the parts. 6. In a machine of the class described, in combination with the plunger,
a supporting member adapted to release the screws in succession,
a delivery member moving between the supporting member and the plunger
adapted to receive a screw and deliver it to the plunger at each
operation of the same, and mechanism to produce the cooperative movement
of the parts. 7.
In a machine of the class described, in combination with the plunger, a
supporting member adapted to release the screws in succession, a
delivery member moving between the supporting member and the plunger, a
trigger on said delivery member to catch and support a screw and movable
to push the screw into place in the plunger, and mechanism to produce
the cooperative movement of the parts at each operation of the plunger. 8.
In a machine of the class described in combination with the plunger, a
supporting member comprising a fixed plate having a delivery opening,
and a rotatable disk provided with holes to receive the screws, said
holes passing in succession over said delivery opening, a delivery
member moving between said plunger and said supporting member, adapted
to receive and deliver a screw to the plunger at each operation of the
same, and mechanism to produce the cooperative movement of the parts. 9.
In a machine of the class described, in combination with the plunger, a
fixed plate having a delivery opening, an intermittently rotating ring,
located on said plate, provided with holes, one of said holes being
brought above the delivery opening at each operation an intermittently
oscillating arm moving between said plunger and the delivery opening in
said fixed plate, a supporting trigger connected to said oscillating arm
said trigger being movable in line with the axis of the plunger, and
mechanism to produce the cooperative movement of the parts. 10.
In a machine of the class described, in combination with the plunger and
the rotatable table, a fixed plate having a delivery opening, an
intermittently rotating ring located on said plate, provided with holes,
one of said holes being brought above the delivery opening at each
operation, an intermittently oscillating arm moving between said plunger
and the delivery opening in said fixed plate, a supporting trigger
connected to said oscillating arm, said trigger being movable in line
with the axis of the plunger, and mechanism actuated by the plunger to
rotate the said ring and to oscillate the said arm, and cams carried by
the table to actuate the said trigger. 11. In a machine of the class described, in combination with the plunger
and the rotatable table, a fixed plate having a delivery opening, an
intermittently rotating ring located on said plate provided with holes,
one of said holes being brought above the delivery
opening at each operation, an intermittently oscillating arm moving
between said plunger and the delivery opening in said fixed plate, a
supporting trigger connected to said oscillating arm, said trigger being
movable in line with the axis of the plunger, cams carried by said
plunger adapted to intermittently oscillate said arm and rotate said
ring, and cams carried by the table to operate said trigger. 12.
In a machine of the class described, in combination with the plunger, a
supporting member adapted to automatically release the screws in
succession, and a delivery member adapted to automatically receive and
deliver a fresh screw to the plunger at each operation of the same. RALPH
G. HEMINGRAY. CHAS.
HAWK. Witnesses: JNO. C. GRAY, JAS. G. MENDENHALL. |