IMPROVEMENTS IN THE MANUFACTURE OF PINS FOR HINGES to be as follows:-
Year: 1884

page_text: I, HENRY SPRINGMANN, one of the firm of Carl Pieper of 109/110 Gneisenau-
Strasse, Berlin, in the kingdom of Prussia, Civil-Engineer and Patent-Agent do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN THE
MANUFACTURE OF PINS FOR HINGES to be as follows:-
"
This invention relates to the pins of hinges whether these pins be the long ones
serving as pintle, or the short ones to be inserted into the upper leaf of the hinge,
and its object is to provide the said pins with swells or collars formed by a process
of up-setting or jumping from the rod from which the pin is to be made and having
about the thickness thereof.
For this purpose two dies are employed each provided with a hole having a depth
equal to the respective lengths of the portions of the pin on either side of the
collar to be produced, while their diameter corresponds to the thickness of the pin.
A piece of a rod of a length exceeding by a certain amount the depth of the two
holes together, having been inserted into one of the dies, the other die is passed
upon the projecting end of the rod and pressed lengthwise against it. The
exceeding portion of the metal will thereby be forced outward between the two
dies so as to form the collar. On one of the dies a recess may be provided for,
serving as mould for the collar.
The dies are operated by a suitable mechanism; and, for the purpose of cutting
the rod from which the pins are to be made into the required lengths, one of the
dies may be made to operate together with a perforated counter piece so as to
constitute a shearing device. By preference this die is inade in two parts, so that
it may be caused to firmly clamp the pin. In some cases the other, or pressing
die, is provided with a steel pin operating to push out of the die the finished pin.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields,
Agent for the said Henry Springmann.

page_text: I, HENRY SPRINGMANN, one of the firm of Carl Pieper, of 109/110 Gneisenau-
Strasse, Berlin, kingdom of Prussia, Civil-Engineer and Patent-Agent, do hereby
declare the nature of said Invention for "IMPROVEMENTS IN THE MANUFACTURE
OF PINS FOR HINGES," and in what manner the same is to be performed, to be
particularly described and ascertained by the following statement:-
This invention relates to the pins of butt-hinges, and its object is, to provide
such pins with swells or collars formed by a process of up-setting or jumping upon
the rod from which the pins are to be made.
On the annexed sheet of drawings Fig. 1 shows a butt-hinge having pins made
according to my invention. Fig. 2 represents the blanks for the pins. Fig. 3 is a
sectional elevation of a machine for forming the blanks. Fig. 4 is a like elevation
with operating parts in different position, Fig. 5 a front view of the die c c¹, and
Fig. 6 a horizontal section of a modified construction of parts of the machine.
Hitherto the heads of the pins of butt-hinges have usually been made separate
from the pins and fastened thereto by means of transverse rivets. This construction
requires the beads to be turned on the lathe from a bar of iron having a thickness
at least equal to the diameter of the collar w, while holes have to be drilled into
the beads lengthwise and transversely. This mode of manufacture is expensive as
well in respect to labour as to the quantity of iron which is lost.
According to my invention the thickest part of the head, i.e. the swell or collar w
of the pins, whether these be the long ones, 8, constituting the pintle of the hinge,
or the short ones t, is produced by a process of longitudinal compression upon the
rod from which the pin is to be made, and having the thickness of the finished
pin. Blanks are thus obtained such as are shown in Fig. 2, and which require
comparatively little turning to form the ornamented head. The pins made from
these blanks will therefore be much cheaper than otherwise, and the heads can
never become detached.
The machine by which the blanks are to be made, operates in a similar manner
as the machines used for pressing the heads of wood-screws. It contains two
moveable steel dies, cc' and d. The die c c consists of two parts c and c³, see
Fig. 5, provided opposite to each other with grooves forming together a hole v, the
said parts thus constituting a clamp for the rod a from which the blank is to be
made. At the inner end of the said grooves or hole v there is a recess q forming
the mould for the swell or collar w. The length of the die from the recess q to the
opposite face of the die is equal to the required length of the part u of the blanks.
The die d has a bore adapted to the thickness of the rod a, and of a depth equal
to the length of the blank part r. If preferred, the aforesaid recess q may be
formed in the die d, in which case the latter must be made longer by as much as the
recess is deep, while the die c c¹ becomes shorter by the same amount. The die c c¹
is moved up and down in a recess of the machine-frame by the combined action of
the rotating cam-disk o, lever L,,pin m, and spring a, the latter acting on the
collar m of the said pin. The die d is fixed in a slide-block e moving in horizontal
guides and operated by the crank n and connecting-rod p. The mechanisms for
actuating the dies may, however, be replaced by other suitable devices. On the
outer side of the die c c¹ there is sunk into the frame a steel plate b having a hole
adapted for the passage of the rod a. This plate operates together with the die-
part c to shear off the portion of the rod required for a blank.
When the crank n and the cam-disk o are in the position shown by Fig. 4, the
die d is at the end of its back stroke while the spring has pressed down the
die c c¹, so that the hole v registers with the hole in the plate b. The rod a is then
pushed forward through the holes in b and c c¹ by an automatic feed-mechanism

page_text: of the kind employed in machines for making blanks for wood-screws, and not
forming any part of this invention. While the rod is being moved, the die-parts c
and c¹ are free to yield to a sufficient extent, as they are at this period pressed
together by the power of the spring and the weight of the lever only. During
the following period of the rotation of the crank n and cam-disk o, the die c c¹ is
gradually lifted and thereby caused to shear off the portion of the rod a projecting
through the plate b, and to carry it into its uppermost position, in which it is in a
line with the bore in the die d. Hereafter the die d is moved forward so that it
will pass with its bore upon the projecting part a¹ of the detached portion of rod a,
and press the latter lengthwise against the plate b; and, as the feed of the rod is
so adjusted that the said part a¹ is by so much longer than the depth of the bore
in d, as is required for forming the collar w, the die, in completing its course, will
squeeze the exceeding quantity of metal into the recess q, whereby the collar is
produced. The died then recedes, leaving the finished blank clamped between the
die-parts c and c¹, (see Fig. 3) which for this purpose have to be very firmly pressed
together upon the blank by the cam-disk o and the lever l. Finally the die c c
redescends, whereupon, at the feeding operation then following, the blank is pushed
out of the die by the rod a.
The modified construction of the die d and slide block e shown by Fig. 6, is
designed to be used when the die c c¹ is made in one piece, or when it is not desired
to press the parts of a divided die together with great force, as in such cases the
blank will or may be pulled out of the die c c¹ by the receding died and remain
sticking therein, so as to require to be removed by special means. For this purpose
the die d is provided with a bore passing completely through it, and within this
bore there is a pin h abutting against, or forming one piece with the pin i having
the head and inserted into a suitable recess of the block e. Moreover the block ⚫
has a slot f through which passes a transverse bolt g fixed with its ends in the
frame of the machine in such a position that the pin i, which projects into the slot f
will strike against the bolt when the slide-block is near the end of its back stroke.
Any blank remaining jammed in the die d, will thereby be pushed out of the same.
Instead of the bolt g, however, a projection fixed to the frame and so arranged as
that the pin i will strike against it at the proper moment, may be used.
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,
1. The process of forming a swell or collar w on blanks for the pins of butt-
hinges by holding the rod for the blank in one die c c', having a hole adapted to
the size of the rod and closed at one end, and by pressing lengthwise against the
rod another die d, having a bore d' of a depth equal to the part of the blank,
substantially as described.
2. In a machine for making blanks for the pins of butt-hinges, the die cc' having
a hole v, the shearing-plate b provided with a hole for the passage of the rod a, the
die d having a bore d', and means for guiding the dies and for imparting to the
die c c¹ a vertical, and to the die d a horizontal reciprocating motion, all combined
substantially as and for the purpose specified.
3. As an article of manufacture blanks for the pins of butt-hinges having a swell
or collar w formed by a process of up-setting between two dies, as bereinbefore
described.
T
1001