An Improved File-cutting Machine.
Year: 1890

page_text: Date of Application, 5th Aug., 1890-Accepted, 4th Oct.,
1890
An Improved File-cutting Machine.
We JOSEPH FISCHER and THEODOR FISCHER both of 1 Bankgasse, 2, Vienna,
Austria, Merchants, 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:-
Our invention relates to an improved file cutting machine for simultaneously and
uniformly cutting four surfaces.
In the accompanying drawings,
Fig. I is an elevation of our improved machine, partly in section.
Fig. II is a side view, and
Figs. III to XIV details of the machine.
In the standards A two hammers bb are so arranged in vertical bearings that the
upper part of the hammer stems protrude through guides in the cross heads L of the
slides, but the hammers themselves are simultaneously lifted and allowed to fall by
means of the tappets von the driving shaft 9. For preventing the rebound and
attaining powerful strokes of the hammers, vertical springs F, F, are arranged around
the hammer stems.
If desired the strength of the blow of the hammers can be increased or decreased
by screwing up or loosening the screw nuts on which rest the helical springs F, or by
turning the tie screws z by means of the hand wheel h.
This device carries at its lower end a friction roller which rests on the corre-
spondingly profiled guide rails w, and by means of screw carrier " and the lever 11
pivotted to the standard A attain a uniform tension of the springs F F during the
cutting operation. Two rests D D are arranged parallel to each other on the rest
standards C, each of the said rests carrying a nut and being guided by the same on
the screw spindles u u Fig. Ill.
These nuts a are fixed to small racks a Fig. III, arranged to slide in longitudinal
guides, in order that in beginning the cutting at the tip of the file the cutting may be
closer, this being attained by the movement of the nuts a being slightly braked by
the toothed segments R and S arranged on the rests D D until the rack comes in
contact with the walls of the rest. For regularly producing this movement a recess
is formed in the guide rails P, and above which the roller S of the lever arm to that
toothed segment S glides. The operation of the screw spindles uu is effected by
means of the gear mechanism, consisting of the eccentric i on the driving shaft with
eccentric rod, the lever 1, Fig. XIV, and pawl 2 gearing into the teeth of the
ratchet wheel 3, which latter, by means of the bevil wheels n, m, which can be put in
and out of gear by the claw coupling 4, will operate the screw spindle u and will
communicate to the rest a jerking forward movement.
In order to transfer this jerking forward movement to the second support, we
prefer to employ a set of toothed wheels yyy as represented in Fig. IV.
The reverse movement of the two rests D D is effected by means of the cog wheel o,
which is operated by the hand wheel & and cog wheel p, which can be readily brought
in and out of gear with the wheels o, by means of the releasing device. The file
pressers cc Figs. II, V and XIII are, at their upper ends, jointed to a cross bar N
and are uniformly pressed on to the files by the weight H Fig. I, on the double
lever f by means of the connecting rod ;, the pressure lever M and the
links N¹.
By treading on the free end of the lever, the weight H, connecting rod j, links or

page_text: members N¹ and cross bar and with these also the two file pressers c, c, are lifted, so
that the files can be removed and fresh blanks exchanged for the same.
The file bed carriers e, e, are preferably made of wrought iron, the file beds r, r, of
steel and the latter also provided with a zine bearing surface for the files. The
driving shaft g also carries a fly wheel d and the fast and loose drums E, E¹.
The driving strap is shifted by means of the fork or shifter R' which is operated by
means of the treadle on the two armed lever g and the connecting rod K.
The holders J J for the cutters t are arranged to turn in the hammers bb, so that
they can be adjusted by set screws to any desired incline of the cut. The file bed
carriers e, e, Figs. VI to XI are preferably arranged on friction rollers in the
rests D, D, as are also the file beds arranged in each of the file bed carriers e.
In order to attain the greatest uniformity of the movement of these parts during
the cutting operation so that all four files lay in exactly the same plane and each
cutter will at each blow cnt a like distance into the surfaces of the files, cylindrical
rollers e, e', and are so arranged in series between the rests D, D, and the file
bed carriers e, e, and between the latter and the file beds r, r, in the recesses or
cavities ee that they can move freely and in this manner produce an appropriate
antifriction bearing surface for the parts D, D, e, e, and r, r.
It will be evident that the length and number of these rollers arranged side by side
and also their number and the distance the recesses are placed apart must correspond
with the length of the file beds and file bed carriers. The file bed carriers e e can be
adjusted to suit the form of file to be cut by means of a worm wheel 10 fixed to the
same and gearing with a worm 11 with handle t¹ as shewn in Fig. XII.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In file cutting machines, the combination of the drop hammers bb carried by
the standards A, being lifted by tappets on the main shaft, and being provided
with adjustable tool holders in order to vary the incline of the cut, substantially as
specified and shown.
2. The combination of the drop hammers bb with the helical springs F, F, between
the heads of the hammers and the guides for the hammer stems in the upper cross
head L, the latter being movably arranged in the main standards A, substantially as
set forth and shewn.
3. The combination of the drop hammers bb, helical springs F F and adjustable
tool holders with the tension device for the springs, consisting of tension screws,
hand wheels and carriers which glide by their rollers ¹ on the profiled guide
rails and with filed pressers c c with cross bar N, on which the weight H, by means
of levers, connecting rods j, pressure levers M and links or members N¹, exercise a
uniform pressure which can, however, be removed by operating a treadle, substantially
in the manner set forth and shown.
4. In combination with the drop hammers b, b, helical springs F, F, spring tension
device, and file pressers c c, the arrangement of the two rests D, D, operated by
eccentric gearing from the main shaft and carried by the beds C in the standards,
combined with two file bed carriers e e movable in longitudinal direction on anti-
friction rollers e¹, e', and which carry two file beds r, r, with antifriction rollers r¹, 701,
substantially as set forth and shown."
a,
5. In combination with the two rests D, D, the arrangement of racks attached
to the nuts, on the screw spindles and sliding in guides, said rests, which, by
means of toothed segments R and S and the recesses in the guide rails P, will,
through the roller S₁ on the arm of the segment $ gliding over the recesses, be so far
moved that the toothing comes against the walls in order to attain a closer cut at the
tip of the files, substantially as specified and shown.
6. In combination with the file bed carriers e e which rest on friction rollers, the
arrangement of worm wheels 10 fixed to the same and gearing into a worm 11, with

page_text: handle t, for adjusting the file bed carriers according to the form of the files to be
cut, substantially as specified in the foregoing specification and illustrated in the
accompanying drawings.
1000
ABEL & IMRAY,
Agents for the Applicants.