Improvements in Punches.
Year: 1891

page_text: Date of Application, 4th June, 1891
Complete Specification Left, 4th Mar., 1892-Accepted, 9th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Punches.
I, FRANCIS NEAL SIMMONDS, of 513 1-2 Minna Street, San Francisco, in
the County of San Francisco and State of California, United States of America,
Skilled Labourer, do hereby declare the nature of said invention for IMPROVE-
MENTS IN PUNCHES, to be as follows:-
:-
This invention consists in forming the face or cutting end of metal punches
separate from and adjustable to the stock of the punch, by this means permitting
these cutting ends to be renewed when worn out. I accomplish this object by
constructing the stock of the punch with a longitudinal opening through its centre.
The detachable end or cutting face is also provided with a longitudinal opening
through its centre and in this opening is inserted a bolt for bolting the cutting end
to the stock of the punch. The cutting end is countersunk on its face to provide
a suitable seating for the bolt head and the bolt after passing through the opening
in the stock of the punch is suitably secured by a nut, the punch being countersunk
at this end for the purpose of containing said nut. [ may also adjust the separable
cutting end to the punch by means of a screw passing through said cutting end and
screwed into the stock.
I may use inferior or cheaper metal for the stock of the punch, than that of
which the cutting end must be made.
Dated this 4th dor of Luna 1901
F. W. BARKER,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Punches.
I, FRANCIS NEAL SIMMONDS, of 513 1-2 Minna Street San Francisco, in
the County of San Francisco, and State of California, United States of America,
Skilled Labourer, 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 :-
The invention relates to punches used for punching iron, steel, or other material;
and the object of the invention is to provide a new and improved punch which is
simple and durable in construction and permits of conveniently renewing the face.
whenever the latter is worn out or injured.
The invention consists of a punch provided with a removable face.
The invention also consists of certain parts and details and combinations of the
same, as will be hereinafter described, and then pointed out in the claims.
Reference is to be had to the accompanying drawing, forming a part of this
Specification, in which the figure is a sectional side elevation of the improvement.
The improved punch is provided with the body part A, formed with the reduced
shank B, on the end of which is held the removable face C, having an easy-going
edge and held in place on the shank and body part by means of a bolt D, which
extends through an opening in the middle of the said shank and body part.
The threaded end of the bolt D is engaged by one or more nuts E, held in a
recess F in the outer end of the body part A, so that neither the said bolt nor
nuts E project beyond the end of the body part. The head G of the bolt D is
formed with the inverted cone G₁ extending from the face C, so that the pointed
end of the said cone first enters the material to be punched before the cutting-edge
о

page_text: of the face comes in contact with the material. The cone G¹ is formed on the end
of a truncated cone G2, extending from the bolt proper and fitted into a corre-
sponding V-shaped recess or countersink in the face C. Instead of using a bolt for
fastening the face C in place on the punch-body, a screw or other means may be
employed.
It will be seen that the punch can be used like any ordinary punch for perforating
metal or other material. The face of the said punch, however, can be conveniently
removed by unscrewing the nuts E and taking out the bolt D to replace the said
face by a new one in case it is worn out or otherwise injured.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
1. A punch provided with a removable face, substantially as shown and
described.
2. In a punch, the combination, with the body part, of a face held removably on
the said body part, substantially as shown and described.
3. In a punch, the combination, with a body part having a shank, of a face fitted
on the said shank, and means, substantially as described, for fastening the said face
to the said body part, substantially as shown and described.
4. In a punch, the combination, with a body part provided with a shank, of a
face fitted upon the said shank, and a bolt for fastening the said face to the said
body part, the said bolt being provided with a pointed head extending centrally
from the said face, substantially as shown and described.
Dated this 4th day of March 1892.
F. W. BARKER,
Applicant's Agent.