IMPROVEMENTS IN FILE CUTTING MACHINERY
Year: 1884

page_text: I ALFRED WEED of Philadelphia in the State of Pennsylvania one of the United
States of America Engineer, do hereby declare the nature of my invention for
IMPROVEMENTS IN FILE CUTTING MACHINERY to be as follows:-
The object of the invention is to render file cutting machinery more adaptable to
variations of the work to be done and particularly to enable the cutter or chisel to
travel over the surface of the file blank whatever be the contour of that blank in
such a manner that its blow or cut may be equably delivered and the desired even
effect be produced.
In carrying out my invention I provide a suitable standard or support for the
apparatus and upon this I support or form the bed or base plate for the feed
mechanism, the file bed and the chisel carrying and operating parts as well as the
driving and adjusting gear.
The bed or base for the parts carrying the file to be cut is shaped of a V section.
I drive the feed mechanism by means of a disc or wheel affixed to the screw shaft
operating the file bed engaging by its frictional surface with another wheel carried
by an axis at right angles to that shaft which axis is driven by the main driving
pulley also carried by that axis.
This latter wheel is constructed by preference of two discs or parts between
which is clasped a surface, of leather which surface has frictional contact with the
disc wheel and this frictional wheel may be moved toward or froin the centre of
the disc so as to vary the rate of speed imparted to the feed shaft.
This main driving pulley by band or cord drives another pulley on an axis affixed
to a frame or support attached to or formed to slide on the main support, which
again in like manner drives a third pulley on an axis also carried by that frame or
support in suitable bearings and upon the axis of this third pulley is also formed
the cam for operating the plunger for giving the chisel its to and fro motion for
cutting the file. The head or part carrying the chisel plunger in its correspondingly
formed guide way also carries an adjustable finger or guiding support the lower
end of which finger rests on the blank and travels over its surface so as to maintain
equidistance between cutter or chisel support and file blank and secure the
uniformity of striking distance despite variation of contour of blank.
The driving pulleys are provided with one or more grooves adapted to facilitate
djustinent or change of speed and the arrangement of the relative positions of the

page_text: three pulleys is such as to permit of the whole of the chisel supporting parts rising
and falling as required in operation on the file blank without practically interfering
with the tensional adjustment of the driving bands or belts.
In order to enable the operation of the machine to be stopped or started whilst
a file blank is in the machine without injury to that file and at all times to save
time and trouble in such stopping and starting I provide a vertical rod or connecting
part (operated by a pedal most conveniently) and at its upper part this rod carries
a pin or stud which engages with the chisel holder, on that rod being raised a
certain distance and as that rod is farther pushed up it raises that chisel by its
holder from its work and then in the further rise of the rod that stud or pro-
jection then engages with and raises the supporting head or plunger carrier free
of the revolving cam so that that cam may freely revolve leading the file cutter
inoperative.

page_text: I ALFRED WEED of Philadelphia in the State of Pennsylvania one of the United
States of America Engineer, do hereby declare the nature of my invention for
IMPROVEMENTS IN FILE CUTTING MACHINERY and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
The object of the Invention is to render file cutting machinery more adaptable to
variations of the work to be done and particularly to enable the cutter or chisel to
travel over the surface of the file blank whatever be the contour of that file blank,
in such a manner that its blow or cut may be equably delivered and the desired
even effect be produced.
In carrying out my invention I provide a suitable standard or support for the
apparatus and upon this I support or form the bed or base plate for the feed
mechanism, the file bed and the chisel carrying and operating parts as well as the
driving and adjusting gear.
In the accompanying drawings Figure 1 shews by a vertical longitudinal par-
tially central section. Figure 2 by a vertical transverse central section, Figure 3
by a rear view and Figure 4 by a side elevation, apparatus for cutting files arranged
according to my invention.
The like letters indicate like parts throughout the figures.
a indicates the bed or base for the parts carrying the file to be cut shaped of a
V section.
The feed mechanism b is driven by means of a disc or wheel c affixed to the screw
shaft & operating the file bed e. a engaging by its frictional surface with another
wheel carried by an axis g at right angles to that screw shaft d which axis g is
driven by the main driving pulley h also carried by that axis g. h¹ is the loose
pulley.
This latter pulley or wheel ƒ is constructed by preference of two discs or parts
(1) (2) between which is clasped a surface of leather (3) which surface (3) has
frictional contact with the said disc wheel c and this frictional wheel may be moved
towards or from the centre of the disc c so as to vary the rate of speed of revolution
and consequent rate of speed of feed imparted thereby to the feed shaft by adjusting
the screw nut (4) on the shaft g.
The main driving pulley by band or cord 2 drives another pulley i on an
axis j affixed to a frame or support m attached to or formed to slide on the main
support of the machine A, which pulley i in like manner drives by band j³ a third
pulley carried on an axis & also carried by that same frame or support m in suit-
able bearings and upon this axis of this third pulley is also formed the cam n
for operating in its rotation the pin o¹ of the plunger o for giving to the chisel
holder p and chisel p carried by its end o¹ its necessary motion to and from the
file blank ? for cutting the same into a file. The head or part B carrying this
chisel-carrying part p¹ and operating plunger o in its correspondingly formed guide
way also carries an adjustable finger or guiding support v adjustable by screw v
the lower end of which finger rests on the blank and travels over the blank's
surface so as to serve to maintain uniform or correct equidistance between the
cutter or chisel support and the file blank runder operation and thereby secure the

page_text: uniformity of striking distance for the chisel p despite variations of contour of the
file blank under operation.
The driving pulleys which operate the driving bands to the driving wheel h, or
other of the driving pulleys, are provided with one or more grooves adapted to
facilitate adjustment or variation or change of speed of the parts and the arrange-
ment of the relative positions of the three pulleys h. i. k. is such that it permits of
the whole of the parts supporting the chisel or cutter prising and falling as required
in effecting the desired operation on the file blank without interfering practically
with the tensional adjustment of the driving bands or belts, h³ between the pulleys
h and i and j between the pulleys i and k.
In order to enable the operation of the machine to be stopped or started whilst
a file blank r is in the machine without injury to that file or blank and at all times
to save time and trouble in stopping and starting the apparatus I provide a vertical
rod or connecting rod t which part . may most conveniently be operated by a pedal
arm or lever u centred to the support A of the machine and linked to that part t.
At its upper part or end this rod t carries a pin or stud or extension t¹ which is
adapted to engage with the chisel holder p₁ or a projection p² from such chise!
holder pupon the rod t being raised a certain distance vertically by the pedal w
and as that rod t is further pushed up it raises that chisel or cutter p by its holder p¹
from its work and then in the further rise of the rod t, that stud or projection t¹
then engages with and raises the supporting head or plunger-carrier o free of the
revolving cam n so as to enable that cam n to freely revolve leaving the file cutter p
inoperative.
b' is a half nut or piece hinged to the bed or base a and capable of being turned
up or down so as to engage with the feed screw b and so impart traverse to the filo
bed a under the chisel or cutter p. e¹ is a projection for effecting movement of the
leveller e of the bed a in its seat.
03 is a stud for securing the chisel or cutter holder p¹ in the plunger or holder o.
q is a wheel applied to the screwed spindle q² which is carried in a corre-
spondingly threaded bearing in the head B and presses onto the plate at the upper
end w of the spring a the lower end of which presses on the upper end of the
plunger o.
Having now particularly described and ascertained the nature of my said
invention and in what inanner the same is to be performed I declare that
I claim is
1. The construction and arrangement of the parts of file cutting machinery for
effecting the equable delivery of and evenness of cut by the chisel or cutter as set
forth.
2. The construction and arrangement of parts of file cutting machinery for
effecting the driving and control of the chisel or cutter operating parts without
practically interfering with the tensional adjustment of the driving bands or belts
as set forth.
3. The construction and arrangement of parts of the foed mechanism of the file
cutting machinery as set forth.
4. The general arrangement and combination of parts forming file cutting
machinery as set forth.
D
1001