AN IMPROVED MACHINE FOR CUTTING HORSE SHOE NAIL BLANKS
Year: 1885

page_text: I WALTER ALFRED BARLOW of 6 St Pauls Churchyard in the city of London
Patent Agent and Engineer, do hereby declare the nature of the said invention for
AN IMPROVED MACHINE FOR CUTTING HORSE SHOE NAIL BLANKS a communication
to me from abroad by Robert Dahlström of Hamburg in the German Empire.
Engineer 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 machines for cutting or dividing certain profilated iron
or steel bars into horse shoe nail blanks. These bars which are thicker at the
longitudinal sides to allow of the necessary material for the manufacture of the
heads of the nails, have formerly been divided into blanks by either two punches
one of which cuts out the blanks having the heads at one side of the bar, while
the other punch cuts out the opposite blanks or in another machine by one punch
only in which case the bar had to be turned for 180 degrees after each cut of
a blank.
In the present machine the blanks are cut off from the bar by means of cutters
attached to a rotating head. The bar is kept in guides and rests with its bottom
end on the circumference of the cutter head; the knives are constructed of different
shape so that one knife cuts a blank having its point to the right and its head to
the left hand side, whilst the following knife cuts a blank having its point to the
left and its head to the right. The bar is during the cutting off of the blanks
pressed against a movable knife or cutter the working edge of which alternately
corresponds to the left and right side revolving cutter.
The machine is illustrated by the accompanying sheet of drawings of which
Fig. 1 represents a longitudinal view, Fig. 2 front view and Fig. 3 ground plan of
the machine. Figs. 4 5 and 6 are (on enlarged scale) representations of detached
parts of the machine showing the movable knife and the revolving cutter-head.
On the frame of the machine are brackets supporting the shaft of the revolving
cutter head A which head A carries two adjustable cutters one of which a cuts off
the blanks w said blanks having the head part to the left when cut off, whilst the
other cutter b cuts off the opposite blanks w².

page_text: The profilated bar S from which the blanks are cut off, rests upon the surface of
head A and is kept in guides fas will be understood from Figs. 1 and 2 of the
drawings. On the other side of bar S is a support D that carries a cutter M. profi-
lated as shown in Fig. 4. Support D slides to and fro from the left to the right
in such manner that during the cutting action of cutter a, M is at the right hand
side, while it is at the left hand side during the action of cutter b. In the first
case the profilation of the left hand side of M corresponds to the shape of cutter a,
in the other case the right hand side of M. corresponds to the cutter b. The result
is, that during the rotation of the cutter head A a blank w and a blank w¹ are
alternately cut off from bar S.
The sliding motion of the support D is according to the illustration, produced
by a guide disc E and cam r, but an eccentric or other known convenient mecha-
nical appliance may be used for giving the specified motion.
Having now particularly described and ascertained the nature and particulars of
my said invention and in what manner the same is to be performed I declare that
what I claim is
In a machine for cutting horse shoe nail blanks the rotary cutter head A provided
with and carrying cutters a and b combined and operating with a movable cutter M
profilated to correspond to the said rotating cutters a and b as and for the purpose
substantially as herein set forth.