Improvements in or applicable to File Cutting Machines.
Year: 1899

page_text: Date of Application, 18th May, 1899
Complete Specification Left, 11th Jan., 1900-Accepted, 24th Feb., 1900
PROVISIONAL SPECIFICATION.
Improvements in or applicable to File Cutting Machines.
I, PETER HEINTZ, of Bismarck Strasse 30, Ludwigshafen on the Rhine,
Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:
My said invention relates to improvements in file cutting machines.
In such machines the proper guiding of the chisel is of great importance.
According to my said invention the carrier which is mounted on the machine
so as to be capable of vertical adjustment has a strengthened projection carrying
a flat spring the other end of which rests in a slot in the chisel holder. Both
The slit in
ends of the flat spring are adjustable and are secured by set screws.
the projection determines the position or direction of the spring while on the
other hand the chisel holder is adjustable in a horizontal plane in order to obtain
the oblique cuts. The movement of the spring is determined by an adjusting
screw working in a nut in an arm on the carrier.
To receive the chisel the chisel holder has a vertical opening closed by a cover
with two screws. The opening for only one of these screws goes right through.
That for the other screw is hook shaped so that to change the chisel the screws
need not be removed but only loosened to permit of the cover being turned in a
vertical plane.
A stud plate or the like in the aperture which takes the chisel prevents the
latter falling out.
Each blow of the ram plunger or striker on striking the chisel produces a cut
in the file and the spring automatically lifts the chisel from the file ready for
the next blow while the carriage advances.
An elastic press roller mounted in a two armed lever is caused to bear on the
file by means of a spring and pressing it against its bed false or imperfect strokes
are prevented.
The above described simple arrangement is advantageously applicable to all
kinds of file cutting machines.
D
Somantranth day of May 1899.

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My said invention relates to improvements in file cutting machines.
In order that it may be more clearly understood I will describe it with
reference to the accompanying drawing in which
Figure 1 is a general view of a file cutting machine constructed in accordance
with my said invention.
Figure 2 shows an elevation and Figure 3 a plan of the chisel guiding arrange-
ment on a larger scale.
Figure 4 shows a detail to be hereinafter described.
In all the figures the same letters refer to the same parts.
In such machines the proper guiding of the chisel is of great importance.
According to my said invention a carrier B which is attached to the body A of
the machine so as to be capable of vertical adjustment has a thickened projection b
carrying in a horizontal slit one end of a flat spring e the other end of which
takes into a slit in the chisel holder d. Both ends of the flat spring care
adjustable and are secured by set screws. The slit in the projection 6 determines
the position or direction of the spring c while the chisel holder d is adjustable
in a horizontal plane in order to produce oblique cuts. The range of movement
of the spring c is determined by an adjusting screw e working in a nut in an
arm on the carrier B.
To receive the chisel g the chisel holder d has a vertical opening closed by a
cover held by two screws. The opening for only one of these screws is a plain
hole. At the other opening the cover is partly cut away so as to form a hook
so that in order to change the chisel the screws need not be removed but only
loosened to permit of the cover being turned over in a vertical plane as indicated
by dotted lines in Fig. 4.
A stud a plate or the like in the aperture which holds the chisel prevents the
latter falling out.
Each blow of the ram plunger or striker a on striking the chisel produces a
cut in the file m and the spring e automatically lifts the chisel from the file ready
for the next blow while the carriage S advances.
An elastic press roller o mounted in a two armed lever k is caused to bear on the
file by means of a spring 7 and pressing the file against its bed prevents false or
imperfect strokes.
The above described arrangement is advantageously applicable to all file cutting
machines.
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 a file cutting machine a chisel guide and carrier consisting of a chisel
holder d mounted so as to be horizontally adjustable on a flat spring c which is
itself capable of horizontal adjustment in a vertically adjustable carrier B sub-
stantially as and for the purpose set forth and shown.
Dated this 10th day of January 1900.
E. T. WHITELOW, A.M.Inst.C.E.,
70, Deansgate, Manchester, Agent for the Applicant.