Improvements in Hand Punches or Jumpers for Making Bore Holes for Blasting and Wedging Operations in Getting Coal and other Minerals and for other like Purposes.
Year: 1887

page_text: Improvements in Hand Punches or Jumpers for Making Bore Holes
for Blasting and Wedging Operations in Getting Coal and other
Minerals and for other like Purposes.
1 HENRY JOHNSON of Trindle Road Dudley in the County of Worcester Mining
Engineer do hereby declare the nature of this invention to be as follows:-
My invention has for its object to remedy the defects of hand punches or jumpers
ordinarily used for making bore holes for blasting and wedging operations in getting
coal and other minerals and for other like purposes and my said invention consists in
constructing and arranging the parts of hand punches or jumpers for the purposes
described in the following manner.
I make a hand punch or jumper of a bar of iron or steel preferably cylindrical in
figure and of the required diameter and strength. On the said cylindrical bar and
preferably at equi distant points I fix or form a series of dise like collars or guides of
a diameter somewhat less than the diameter of the bore hole to be made. The edges
of the disc like collars or guides are rounded in order to enable them to work smoothly
in the bore hole being made. I make the bit or cutter constituting the fore end and
acting part of the hand punch or jumper separate from the bar and I connect it
thereto by means of a convex or male screw at the rear end of the bit or cutter taking
into a concave or female screw in the front end of the said bar and near the front or
leading disc like collar or guide. The acting end of the bit or cutter is of a chisel
form and of a breadth equal to the diameter of the bore hole to be made and
somewhat greater in breadth than the diameter of the disc like collars or guides on
the bar.
I make hand punches or jumpers according to my invention of different lengths a
short one being employed for making the first portion of the bore hole and a longer
one for completing the bore hole. In the short hand punch or jumper I place the
disc like collars or guides closer together than in the long hand punch or jumper and
I make the detachable bit or cutter shorter than that of the long hand punch or
jumper. I have found that a short hand punch or jumper two feet in length and having

page_text: disc like collars or guides about four inches apart and that a long hand punch or
jumper six feet in length and having the disc like collars or guides about a foot apart
answer well in practice but I do not limit myself to any particular proportions.
I prefer to make the outer or rear end of the bar of the hand punch or jumper of
somewhat greater diameter than the other part of the bar in order to afford the
operator a firmer grasp upon it and I also form on or attach to the enlarged rear end
of the bar a metallic ball or cylinder which when a vertical or downward bore hole is
to be made very much facilitates the operation the momentum of the said ball or
cylinder conspiring with the blow delivered by the hand of the operator. The metallic
ball or cylinder may be either permanently attached to or be capable of detachment
from the rear end of the punch or jumper.
'
By the use of hand, punches..or jumpers made according to my invention the
operator can make a straight and cylindrical bore hole with great readiness and with a
precision unattainable by the use of ordinary hand punches or jumpers. The detach-
able bit or cutter permits of the resharpening or replacement of the bit or cutter
without removing the body of the punch or jumper from the mine and the sharpening
of the bit or cutter does not involve the handling of the large mass of metal con-
stituting the body of the punch or jumper.
Although I prefer to make the disc like collars or guides fixtures on the bar yet
they may be loose upon the bar so that while they support and guide the bar the said
bar may slide or work through them. Hand punches or jumpers for making bore
holes for blasting and wedging operations in getting coal and other minerals and for
other like purposes made according to my invention are used in the same way as
ordinary hand punches or jumpers but require in their use less skill on the part of the
operator.
Dated this Twenty ninth day of July 1887.
WT: WHITEMAN,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Hand Punches or Jumpers for Making Bore Holes
for Blasting and Wedging Operations in Getting Coal and other
Minerals and for other like Purposes.
I HENRY JOHNSON of Trindle Road Dudley in the County of Worcester Mining
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:
My invention has for its object to remedy the defects of hand punches or jumpers
ordinarily used for making bore holes for blásting and wedging operations in getting
coal and other minerals and for other like purposes and my said invention consists in
constructing and arranging the parts of hand punches or jumpers for the purposes
described in the following manner.
I make a hand punch or jumper of a bar of iron or steel preferably cylindrical in
figure and of the required diameter and strength. On the said cylindrical bar and
preferably at equi distant points I fix or form a series of disc like collars or guides of
a diameter somewhat less than the diameter of the bore hole to be made. The edges
of the disc like collars or guides are rounded in order to enable them to work smoothly
in the bore hole being made. I make the bit or cutter constituting the fore end and
acting part of the hand punch or jumper separate from the bar and I connect it thereto
by means of a convex or male screw at the rear end of the bit or cutter taking into a
concave or female screw in the front end of the said bar and near the front or leading
disc like collar or guide. The acting end of the bit or cutter is of a chisel form and
of a breadth equal to the diameter, of the bore hole to be made and somewhat greater
in breadth than the diameter of the disc like collars or guides on the bar...
I make hand punches or jumpers according to my invention of different lengths a
short one being employed for making the first of the bore hole and a longer one for
completing the bore hole. In the short hand punch or jumper I place the disc like
collars or guides closer together than in the long hand punch or jumper and I make
the detachable bit or cutter shorter than that of the long hand punch or jumper. I
have found that a short hand punch or jumper two feet in length and having disc like
collars or guides about four inches apart and that a long hand punch or jumper six feet
in length and having the disc like collars or guides about a foot apart answer well in
practice but I do not limit myself to any particular proportions.
I prefer to make the outer or rear end of the bar of the hand punch or jumper of
somewhat greater diameter than the other part of the bar in order to afford the
operator a firmer grasp upon it and I also form on or attach to the enlarged rear end
of the bar a metallic ball or cylinder which when a vertical or downward bore hole is
to be made very much facilitates the operation the momentum of the said ball or
cylinder conspiring with the blow delivered by the hand of the operator. The metallic
ball or cylinder may be either permanently attached to or be capable of detachment
from the rear end of the punch or jumper.
By the use of hand punches or jumpers made according to my invention the
operator can make a straight and cylindrical bore hole with great readiness and with
a precision unattainable by the use of ordinary hand punches or jumpers.
detachable bit or cutter permits of the resharpening or replacement of the bit or cutter
The

page_text: without removing the body of the punch or jumper from the mine and the sharpening
of the bit or cutter does not involve the handling of the large mass of metal con-
stituting the body of the punch or jumper.
Although I prefer to make the disc like collars or guides fixtures on the bar yet
they may be loose upon the bar so that while they support and guide the bar the said
bar may slide or work through them. Hand punches or jumpers for making bore
holes for blasting and wedging operations in getting coal and other minerals and for
other like purposes made according to my invention are used in the same way as
ordinary land punches or jumpers but require in their use less skill on the part of the
operator.
Figure 1 of the accompanying Drawing represents in elevation a hand punch or
jumper for making bore holes constructed according to my invention and Figure 2
represents a short detachable bit or cutter which may be used with the hand punch or
jumper in place of the long bit or cutter represented.
aa is the body of the hand punch or jumper consisting of by preference a cylin-
drical bar of iron or steel and bbb are the disc like collars or guides which may be
fixed by screwing or otherwise upon the said body or bar a or they may be loose
upon the said bar c is the detachable bit or cutter having at its inner end a convex or
male screw d which takes into a corresponding concave screw at e in the end of the
bar or body a as represented in the drawing is the rear end of the body or bar of
the hand punch or jumper made of greater diameter than the other part in order to
afford the operator a firmer grasp upon it. I sometimes form on or attach to the
enlarged rear end of the body or bar a metallic ball or weight shown in Figure 1 at g.
Any desired shape may be given to the ball or weight g. The said ball or weight
when a downward or vertical hole is to be made much facilitates the operation as
herein before explained. The ball or weight g may be made in one piece. with the
enlarged end of the body or bar or may be made separately and attached to it by
screwing or otherwise.
The disc like collars or guides bbb may be used with hand punches or jumper
having fixed bits or cutters or with hand- punches or jumper having detachable bits.
or cutters.
Having now particularly described and ascertained the nature of my invention and
the manner in which the same is to be performed I declare that I claim as my
invention of "Improvements in hand punches or jumpers for making bore holes for
blasting and wedging operations in getting coal and other minerals and for other
like purposes."
First. Providing the bars or bodies of the said hand punches or jumpers with
disc like collars or guides either fixed or loose for the purpose and substantially
as hereinbefore described and illustrated in the accompanying Drawing.
Secondly. Making the bits or cutters of the said band punches or jumpers
detachable for repair or replacement whether the hand punches or jumpers be
provided with the fixed or loose disc like collars or guides referred to in the
preceding claim or are without the said disc like collars or guides substantially as
hereinbefore described and illustrated in the accompanying Drawing.
Thirdly. Making on or connecting to the rear ends of the bars or bodies of the
said hand punches or jumpers a ball or weight for the purpose of facilitating the
making of vertical or downward bore holes substantially as herein before described
and illustrated in the accompanying Drawing.
D 1
3011
וי
1000
W. T. WHITEMAN,
Agent for the Applicant.