IMPROVEMENTS IN MACHINES FOR PUNCHING HORSESHOE-NAIL-BLANKS to
Year: 1884

page_text: I PER ADOLF NILSSON of Bahrenfeld near Hamburg, Germany, Machinist do
hereby declare the nature of my invention for IMPROVEMENTS IN MACHINES FOR
PUNCHING HORSESHOE-NAIL-BLANKS to bo as follows:—
My invention referring to improvements in machines for punching horseshoe-
nail blanks, is based upon a peculiar manner of cutting out the nail blanks from the
iron or steel bars or plates, which requires a corresponding shape of the dies or
knives. The bar, whercout the nail blanks are to be cut, is advanced by jerks or
intermissions by means of one of the well known mechanisms employed for this
purpose. A die of the proper shape of the nail-blank punches out therefrom at
each motion one blank in such a manner, that the heads of all such blanks lay
towards the same side of the punching bed. The remaining part of the bar thus
will show the form of a comb, which afterwards is divided by a knife with a
straight edge into as many blanks as the comb has teeth the coherent part of the
comb being cut always between two teeth. Both die and knife are raised and
lowered simultaneously and are at a distance from each other, which corresponds
with the pitch of two teeth and a half of the comb, but such distance may be
varied conveniently.

page_text: the iron or steel bars or plates, which requires a corresponding shape of the dies or
knives. The bar, whereout the nail blanks are to be cut, is advanced by jerks or
intermissions by means of one of the well known mechanisms employed for this
purpose. A die of the proper shape of the nail-blank punches out therefrom at
each motion one blank in such a manner, that the heads of all such blanks lay
towards the same side of the punching bed. The remaining part of the bar thus
will show the form of a comb, which afterwards is divided by a knife with a
straight edge into as many blanks as the comb as toeth the coherent part of the
comb being cut always between two teeth. Both die and knife are raised and
lowered simultaneously, and are at a distance from each other, which corresponds
with the pitch of two teeth and a half of the comb, but such distance may be varied
conveniently.
In order to make my invention more clearly understood I will now describe it
with reference to the accompanying drawing in which Figure 1 is a front view of
the working part of a punching machine provided with my said improvements, and
Fig. 2 is a side elevation thereof partly in section. Fig. 3 is a view from beneath
of the punching head on a larger scale; Fig. 4 is a plan of the bar illustrating tho
action of the die and the knife; Figs. 5 and 6 show the same bar placed upon tho
punching bed.
Similar lotters refer to similar parts throughout the several views.
a is the die and 6 the knife both fixed side by side by means of set screws g to
the punching head h. c is a projection of the punching bed i and fills up that
space of the bar d where the heads of the blanks have been before the die a cut
them out. e is the line where the knife b has to divide the teeth of the comb and f
an opening in the punching bed, through which the blanks cut off by the knife b
leave the machine; this opening is wider towards the projection c viz. towards the
points of the comb-teeth, as the straight knife b when doing its work will naturally
place the blank, which is just to be separated, in an inclined position towards tho
remaining teeth of the comb.
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
In machines for punching horseshoo-nail blanks the combination of a die a of
the proper shape of a blank with a straight knife b substantially as and for the
purpose specified.