Improvements in Pin Making Machines.
Year: 1889

page_text: Date of Application, 6th Feb., 1889
Complete Specification Left, 30th Aug., 1889-Accepted, 19th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in Pin Making Machines.
I HENRY WILLIAM TONKS, of Hockley Hill, Birmingham in the county of Warwick
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in dress pin making machines, and has
for its object, greater facilities of adjustment of the cutting off mechanism; the
better disposition of the parts for imparting motion to the feed slide, and also the
feed gripper; affording thereby increased access to the working parts and tools of
the machine; and further improvements connected with the adjustment of the
heading tool.
I attain these objects after the following manner :-In machines of present make
where a lever cut off is used, the bracket upon which is carried the fulcrum of
the cutting off lever, and the part upon which is carried the cut off barrel or die,
are separate, so that when a different length of pin is required, two adjustments are
necessary. In my invention however, I provide a bracket with adjustment, upon
the top of the machine, which shall carry the barrel portion of the cut off, and
also the lever, so that when the one is adjusted, the other is necessarily done at the
same time.
Further. At present in machines of this class, a kind of bridge bar, is carried
from the main shaft of the machine at one end, generally over the top of the machine
to the other end, where it is connected to the feed slido, or in other cases, it is
carried somewhat near the side of the machine; in either case however, and par-
ticularly the former, it is very much in the way, preventing ready access to the
tools &c., which require frequent attention.
To obviate these defects, I provide upon the underside of the frame of the machine,
guidos to receive a slide, which latter is suitably bent up at the shaft end, and
provided with an antifriction roller, against which works the operating cam upon
the shaft, and kept in contact therewith by a spring. The other end is connected
to the feed slide, by means of a stud, moving backwards and forwards in a slot
provided in the machine bed. By this arrangement the said slide is entirely out of
the way, leaving an open free access to the top of the machine.
Again. In order to give the necessary gripping action to the feed grippers during
their forward motion, I provide that the top gripping tool shall be carried by a
cross lever, having its fulcrum about midway in its length, and its outer end extending
to the side of the frame of the machine. Upon the main shaft at this said side
of the machine, a cain is placed which operates a lever running along the side of
the machine whose fulcrum is about midway along. At the other end of this lever
a flat surface is provided upon its upper side, to communicate with the outer end of
the aforesaid cross lever. This flat surface is so arranged as to be parallel with
the feed slide.
This communication is effected by means of an adjustable screw pin in the
outer end of the cross lever, whose point rests and rides in a slipper upon the side
lever.
A spring is made to always tend to press down the outer end of the said cross lever,
and thus keeps also the side lever against its cam.
The cam is suitably shaped to impart pressure to the gripping tools in their forward
or feed motion, but frees them upon the return motion.
Further. It has hitherto been the custom in machines of this kind to provide that
the heading tool shall be carried in a holder, which latter is further carried in an
| enlarged hole, in the heading slide.

page_text: At the fore end of the slide are set pins by which the point of the tool can be
adjusted to the right or loft, up or down, while at the rear end of this holder, which
extends about one third of the length of the slide, is a diagonal thrust pin, whose
head extends upwards and is accessibile above the top of the slide.
At present howover. these tool holders are so short. that their fore adjustment
moves in too quick a radiating circle, and thereby alters the fair presentation of its
face to the pin. To obviate this, I carry the holder to within as short a distance as
possible of the rear end of the slide, and arrange the end adjustmont pin to enter
the slide at the end, and in as near an horizontal line as possible, at a much lower
angle than heretofore.
Thus the radiating angle is very much decreased, the front of the holder moving in
a line very much nearer to that of a straight line.
Again. Reverting to the cutting off lover, it is found that as the ordinary parallel
pin upon which it works as a fulcrum, wears, the consequent slack causes the pins
fo he sheared off unevenly.
Instead of this however, I provide that the pin shall be combined with the lover, and
have a conical portion thereon, which shall take into a corresponding conical portion
in the bearing brackot, and further provided with adjusting lock nuts, so that the
wear may be from time to time taken up, thus always insuring steadiness in such
parts.
Dated this 5th day of Bahruary 1889.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Pin Making Machines.
1 HENRY WILLIAM TONKS of Hockley Hill, Birmingham in the county of Warwick
Engineer 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:-
This invention relates to improvements in dress pin making machines, and has
for its object greater facilities of adjustment of the cutting off mechanism; the
hetter disposition of the parts for imparting motion to the feed slide, and also the feed
gripper, affording thereby increased access to the working parts and tools of the
machine and further, improvements connected with the adjustment of the heading
tool.
In order that I may be able to more clearly describe this my invention, and how it
is to be performed, I have appended hereunto illustrative sheets of drawings upon
which are figures and letters of reference, similar letters referring throughout the
several views, to the same thing or part, and in which :-
Fig. 1, is a view in elevation of such parts of the machine that embrace these my
improvements.
Fig. 2, is a plan viow of the machine.
Fig. 3, is an elevation in detail of the cutting off mechanism, looking in the direction
of arrow A.
Fig. 4, is an elevation in detail of the slide gripping mechanism, looking in the
direction of arrow B.
Fig. 5, is a sectional elevation in detail of the heading slide, showing improved
adjustment of the heading tool.
Fig. 6, is a frout view of Fig. 5.
As will be seen, only such parts of a machine are shown, which are calculated
to afford a general idea of the machino, adjacent to or affected by those my
improvements.
In machines of present make, where a lover cut off is used, the bracket upon
which is carried the fulcrum of the cutting off levor, and such other part upon which

page_text: is carried the cut off barrel or die, are separate, so that when a different length of
pin is required, two adjustments are necessary. In my invention however, I provide
a bracket a, see Figs. 1, 2, & 3, capable of a longitudinal adjustment by means of slot
holes b. Upon this is also carried the adjustable bracket c, in which is carried the
barrel portion d, of the cut off.
Upon this bracket a, is also further carried the cut off lever e, which is operated by
the lever, which in its turn is actuated by the cam g. Thus it will be readily seen
that when a different length of pin is required, upon adjusting the bracket the
bracket C₁ is carried with it, so that only one adjustment is necessary.
Again. Reverting to the cutting off lever e, it is found that as the ordinary
parallel pin upon which it works as a fulcrum, wears, the consequent slack causes
the pins to be sheared off unevenly. Instead of this however. I provide that the
pin h, shall be made in one with the lever, and have a conical portion thercon which
shall take into a corresponding conical portion in the hearing bracket a, and further
provided with adjusting lock nuts so that the wear may be from time to time taken
up, thus always ensuring steadiness in such parts.
Further. At present in machines of this class, a kind of bridge bar is carried from
the main shaft of the machine at one end, generally over the top of the machine to
the other end, where it is connected to the feed slide, or in other cases it is carried
somewhat near the side of the machine; in either case however, and particularly the
former, it is very much in the way, preventing ready access to the tools &c. which
require frequent attention.
To obviate these defects, I provide upon the underside of the frame of the machine,
guides at i,, or other suitable parts, to receive a slide, which latter is suitably
bent or carried up at the shaft end and provided with an antifriction roller against
which works the oporating cam ke, upon the shaft l, and kept in contact there-
with by a spring m. The other end is connected to the feed slide n, by means of a
stud o, moving backwards and forwards in a slot provided in the machine bed. By
this arrangement the said slide j, is entirely out of the way of the machine minder or
operator, leaving an open free access to the top of the machine.
Again. In order to give the necessary gripping action to the feed grippers during
their forward motion, I provide that the top gripping tool p. shall be carried by a
cross lever 7, having its fulcrum about midway in its length, and its outer end
extending to the side of the frame of the machine. Upon the main shaft at this said
side of the machine a cam is placed, which operates a pressure levers, running
along the side of the machine, whose fulcrum is about midway along. At the other
end of this lever s, a flat surface is provided upon its upper side, to communicate
with the outer end of the aforesaid cross lever . This flat surface is arranged to be
parallel to the feed slide n. This communication is effected by means of an adjust-
able screw pin t, in the outer and of the cross lever g, whose point rests and rides in
a slipper u, upon the side lever s. A spring, is made to always press down the
outer end of the said cross lever g, and thus also keeps the side lever s, against its canı.
This cam is suitably shaped to impart pressure to the gripping tools in their forward
or feed motion, but frees them upon the return motion. The said pressure may be
readily adjusted by means of the adjusting pin s, by which a greater or less pressure
may be given.
Further. It has hitherto been the custom in machines of this kind to provide that
the heading tool shall be carried in a holder, which latter is further carried in an
enlarged hole in the heading slide.
At the fore end of the slide are set pins, by which the point of the tool can be
adjusted to the right or left, up or down, while at the rear end of this holder, which
extends about one third of the length of the slide, is a diagonal thrust pin, whose
head extends upwards, and is accessible above the top of the slide.
At present however these tool bolders are so short that their fore adjustment moves
in too quick a radiating circle, and thereby alters the fair presentation of its face
to the pin. To obviate this, 1 carry the holder w, to within as short a distance as
possible of the end of the slide and arrange the end adjustment pin y to enter the

page_text: slide at the end near the roller z, and in as near an horizontal line as possible, at a
much lower angle than heretofore. Thus the radiating angle is very much decreased,
the front of the holder moving in a line very much nearer to that of a straight
line.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. In a dress pin making machine the combination with the adjustable bracket a,
carrying the cutting off lever, of the bracket e, carrying the barrel portion of the
cutting off mechanism, substantially as shown and described, and for the purpose
specified.
2. In a dress pin making machine, the combination and arrangement of the under
slide, with the feel slide n, constructed, arranged, and operating, substantially as
described and shown upon the drawings.
3. In a dress pin making machine, the combination with the feed slide n, of the
cross lever g, adjustable pin t, and pressure levers, having a surface upon which the
pintslides, parallel to the motion of the slide n, constructed, arranged, and operating,
substantially as described and shown upon the drawings.
4. The combination with the side lever s, of the adjusting pin s', substantially as set
forth and shown.
5. In a dress pin making machine the improved arrangement of carrying the
heading tool holder w, near to the rear end of the slide .r, and of carrying the adjusting
pin y, in the said rear end of the slide, substantially as shown and described, and for
the purposes specified.
Dated this 29th day of A
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.