IMPROVEMENTS IN PUNCHES
Year: 1873

page_text: LETTERS PATENT to Joseph Bennett Howell, of Sheffield, in the
County of York, for the Invention of " IMPROVEMENTS IN PUNCHES."-
A communication from abroad by Isaac P. Richards, of Whitinsville,
County of Worcester, and State of Massachusetts, United States
of America.
PROVISIONAL SPECIFICATION left by the said Joseph Bennett Howell
at the Office of the Commissioners of Patents, with his Petition,
on the 9th October 1873.
I, JOSEPH BENNETT HOWELL, of Sheffield, in the County of York, do
hereby declare the nature of the said Invention for "IMPROVEMENTS
IN PUNCHES," to be as follows:-
According to this Invention the stock by which the punch is held in
the lever or drop, of a power or stamping press at its lower end is
furnished with a screw thread to receive a coupling nut, by which the
punch which is made seperable from its stock is secured. The face or
working end of the punch may be of any proper form or figure.

page_text: The punch near its upper end is provided with a bevelled shoulder,
and the coupling nut is to be formed to embrace the shoulder in a
manner to hold the punch firmly up to the lower end of the stock,
when the said nut is screwed thereon to the extent to carry the punch
into close contact with the stock. In order that the punch may have
a firm bearing on the stock it is slightly recessed or hollowed at top, and
to prevent any possible tendency of the coupling nut becoming loose I
may introduce an elastic washer between the stock and the nut.
For punching with reference to a hole made in a plate as, for instance,
for the making of a nut or a washer, a central teat becomes necessary, it
being formed with a shoulder and provided with a shank which is
received in an axial hole made through the punch until the shoulder
brings up against the face or lower end of the punch. The upper
potion of this punch hole or passage may be somewhat larger in
diameter than the rest of the hole in order to facilitate the removal of :
the teat shank from the punch.
The object of making the punch with the hole or passage carried
entirely through it is to render it easy to expel the teat shank from the
punch hole, by an instrument introduced therein whenever the teat
shank may have become so strongly set into the hole as to render 2
'difficult if not impossible, the separation of the two by the fingers of a
person's hand applied to the teat.
In punches which have the teat in one piece with the punch it
becomes a difficult matter to repair the punch when it may be necessary
so to do, as it cannot conveniently be effected without drawing the
⚫temper of the punch preparatory to refacing it, a subsequent hardening
of it being requisite.
с
With the separable teat it will only be necessary to withdraw the teat
or expel it from its socket in the punch in order to render the punch
available for being ground or refaced on a grindstone or by means of a
proper grinder.
With the above described stock and coupling and mode of making the
punch the latter may be set firmly up to the stock, or punches of
variable sizes may be used.
The conical shoulder enables the coupling nut to readily adapt itself
to the punch, so as to hold it firmly against the stock when the nut is
screwed up, such being a matter of much importance.

page_text: Furthermore, by means of the said conical shoulder and the contiguous
surrounding conical part of the nut, the punch becomes properly
centered relatively to the stock.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Bennett Howell in the Great Seal Patent
Office on the 7th April 1874.
TO ALL TO WHOM THESE PRÉSENTS SHALL COME, I, JOSEPH
BENNETT HOWELL, of Sheffield, in the County of York, send greeting.
•
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Ninth day of October, in the year of
our Lord One thousand eight hundred and seventy-three, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Joseph Bennett Howell, Her special
licence that I, the said Joseph Bennett Howell, my executors, adminis-
trators, and assigns, or such others as I, the said Joseph Bennett
Howell, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time, and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN PUNCHES," a communication to me from abroad by
Isaac P. Richards, of Whitinsville, County of Worcester, and State of
Massachusetts, United States of America, upon the condition (amongst
others) that I, the said Joseph Bennett Howell, my executors or
administrators, by an instrument in writing under my, or their, or one
of their hands and seals, should particularly describe and ascertain the
rature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
'
NOW KNOW YE, that I, the said Joseph Bennett Howell, do hereby
declare the nature of the said Invention, and in what manner · the
same is to be performed, to be particularly described and ascertained in
and by the following statement, reference being had to the accompanying

page_text: Sheet of Drawings, and to the letters and figures marked thereon (that
is to say) :-
This Invention relates to the combination with a punch of a separable
guide teat whose shank is received in an axial hole or socket in the
punch. It also relates to providing the punch which is made separable
from its stock with a shoulder to receive a screw coupling nut by which
it is secured to the said stock. It further relates to making a slight
recess in the top of the punch in order that it may have a firm bearing
on the stock, and to the introduction of an clastic washer between the
stock and the coupling nut to prevent any tendency of the latter to
work loose.
In order that the Invention may be more readily understood, I have
illustrated it in the accompanying Drawings, in which Figure 1 is a side
elevation of the punch, its stock, and their connection coupling nut
without the guide teat to be herein-after described.
Figure 2 exhibits the said guide teat, a longitudinal and axial section
of the separable punch, and an elevation of the lower part of its stock.
Figure 3 exhibits a longitudinal section of the coupling nut and
elevations or side views of the separable punch and stock, the said nut,
punch, and stock being shown coupled together.
Figure 4 is a lower end view of the punch and the guide teat.
In Figures 1, 2, and 3, A denotes the punch stock which is to be
formed to fit to the holo or socket designed to receive it in the lever or
drop of a power or stamping press. Such stock may be provided with a
seat or bearing a to receive the terminus of the clamp screw when
employed to hold the stock in a press as mentioned.
The stock at and near its lower end is furnished with a male screw B
to receive a coupling nut D, having the form represented in Figure 3,
such nut being constructed with a female screw to engage with the
screw B; O represents the punch. Its face or working end or part
may be of any proper form or figure to adapt it to the punching from
sheet metal, nuts, washers, or blanks, as used by manufacturers or
others, particularly in the fabrication of jewelry.
A convenient way to construct the punch is to take a piece of steel of
suitable dimensions, and drill or bore a hole i axially through it. This
having been done the piece of metal, in case the punch is to liave a

page_text: circular face, should be properly arranged upon and fixed to a lathe
arbor and be turned so as to produce a working end with such a face.
In case the working end is to be prismatic with polygonal face, a planer
or other proper means well-known to mechanics may be employed to
produce it.
The punch near its upper end is provided with a beveled shoulder c, c,
which may be arranged as shown in Figures 2 and 3, and the coupling
nut D is to be formed to embrace the shoulder in a manner to hold the
punch firmly up to the lower end of the stock, when the said nut is
screwed upon the screw B to the extent to carry the punch into close
contact with the stock.
For punching with reference to a hole made in a plate, as for instance,
for the making of a nut or a washer a central teate becomes necessary,
it being formed with a shoulder ƒ and a shank 9 arranged in manner as
represented. The shank goes into the axial hole i of the punch until
the shoulder brings up against the face or lower end of the punch.
The upper portion of the punch hole or passage i may be somewhat
larger in diameter than the rest of the hole, in order to facilitate the
removal of the teat shank from the punch.
The object of making the punch with the hole or passage carried
entirely through it is to render it easy to expel the teat shank from the
punch hole, by an instrument introduced therein whenever the teat
shank may have become so strongly set into the hole as to render
difficult if not impossible the separation of the two by the fingers of a
person's hand applied to the teat. x is a slight recess at the upper end
of the punch to ensure its having a firm bearing on the stock, but this
recess may be made on the end of the stock A with the same object;
y is an india-rubber washer compressed between the top of the coupling
nut D, and a shoulder on shank A, as shown, to prevent any tendency of
the nut working loose.
In punches which have the teat in one piece with the punch it
becomes a difficult matter to repair the punch when it may be necessary
so to do, as it cannot conveniently be effected without drawing the
temper of the punch preparatory to refacing it, a subsequent hardening
of it being requisite.
With the separable teat it will only be necessary to withdraw the
teat or expel it from its socket in the punch, in order to render the

page_text: punch available for being ground or refaced on a grindstone or by means
of a proper grinder.
With the above described stock and coupling and mode of making
the punch, the latter may be set firmly up to the stock, or punches of
variable sizes may be used.
The conical shoulder enables the coupling nut to readily adapt itself
to the punch, so as to hold it firmly against the stock when the nut is
screwed up, such being a matter of much importance.
5
Furthermore by means of the conical shoulder c, c, and the contiguous
surrounding conical part of the nut, the punch becomes properly 1
centred relatively to the stock..
Having described the nature of the Invention and the manner of
performing the same, I declare that what I claim as the Invention to be
protected by the herein-before in part, recited Letters Patent is,-
1st. The combination of the separable teat made with a shoulder and 1
shank, as described with the separable punch having a teat shank socket
or hole going entirely through it axially as specified.
2nd. The combination of the separable teat having a shoulder and
shank as described, and the separable punch having the shoulder c, c,
the recess x, and the teat shank passage going entirely through it, as set 2
forth with the screw coupling nut D, the shank A, and its screw B. all as
herein specified.
3rd. The combination with the stock A, punch C, and nut D of the
clastic washer y introduced between the nut D and the stock A,
substantially os ond for the numose ancnified
herein specified.
3rd. The combination with the stock A, punch C, and nut D of the
clastic washer y introduced between the nut D and the stock A,
substantially as and for the purpose-specified.
In witness whereof, I, the said Joseph Bennett Howell, have
hereunto set my hand and seal, this Sixth day of April, in the
year of our Lord One thousand eight hundred and seventy-
four.