Year: 1888

page_text: I REGINALD HADDAN of the firm of Herbert & Co., Patent Agents of 18 Buckingham
Street, Strand, W.C. London in the County of Middlesex, Civil Engineer do hereby
declare the nature of this invention a communication to me from abroad by Franz
Neswadia of 'Ottakring near Vienna in the Empire of Austria Manufacturer 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 file cutting machines in which the hammer block is raised
or lowered by means of cranks and connecting rods by the intermediacy of an air
cylinder (similar to an atmospheric hammer) and it consists in certain improved
features of construction, the principal objects of which are to enable the shaft of the
chisel holder to be adjusted, higher or lower according to the thickness of the file, to
cause the distance of the raising of the chisel from the file surface to be always the
same. This invention also consists in a peculiar device for mounting the file on the
carriage, and in devices for turning or adjusting the edge of the chisel so that a more .
or less inclined cut may be made according to desire. In the annexed drawings
Fig. 1 represents a vertical cross section of the improved machine. Fig. 2 is a
vertical longitudinal section thereof Fig. 3 shows the device for regulating the stroke
or lift of the chisel holder. Fig. 4 is a horizontal section of the device for regulating
the air pressure. Fig. 5 is a plan view of the carriage supporting the file. Figs. 6
and 7 are respectively front elevation and longitudinal section of the device for
holding the file. Fig. 8 shows in a horizontal section and plan view the chisel shaft
and the chisel holder. Figures 3, 6 7 and 8 are drawn on a larger scale than the
remaining figures. There are also shown only two parts of the machine which are
necessary for understanding the invention, the other well known parts for instance
automatic stopping mechanism are omitted.
Similar letters of reference indicate corresponding parts throughout the figures.
a is the frame of the machine through which passes the driving shaft 6 and upon
which are provided the standards a. Cranks & on the shaft band connecting rods
operate the atmospheric cylinder c. The latter is provided with piston, piston rod, and
hammer block and is guided in the standards a¹. The regulation of the air pressure
is effected by means of the valve c¹ (Fig. 4) which may be opened more or less in the
following manner.
By turning the hand wheel c³, the lever e pivoted at c is screwed more or less
into the threaded extremity of the spindle c, the other longer extremity of the lever c
being provided with a vertical pressure rod c; presses more or less upon the valve
rod and thus effects a corresponding opening of the valve. The motion of the file
carrier is effected in a known manner, for instance the worm shafte is rotated from
the driving shaft 6 by means of suitable pulleys and cone pulleys. Upon the shaft e is
a worm which meshes with a worm wheel f¹ upon the screw spindle of the
carriage which slides in the frame a. (see Figs. 1 and 2), or the rotating of the screw
spindle may be effected in any other known manner, for instance by pawl and

page_text: .
ratchet whool. The raising of the chisel from the file after the blow is effected in the
following manner (see Fig. 3). The lever pivoted upon the gudgeon g receives a
rocking or oscillating motion by the to and fro motion of the flange of the atmo-
spheric cylinder. Upon this lever g' are attached on the right and left side respectively
two movable plates g, guided upon the lever g' by pins and slots g. These plates
are connected together towards the chisel shaft by means of a key piece go, and against
which bears the screw 9 which serves as an adjusting screw and passes through an
arm fixed upon the chisel shaft i. When the flange c* moves backward the lever g¹,
the key face presses against the screw g, (or the lever i¹) and so turns the chisel
shaft and raises the chisel from the file.
By a spring or any other suitable device the lever g₁ may be always pressed
towards the screw g..
In order to lower or raise the shaft i (according to the thickness of the file) the
shaft i is journalled in boxes which slide in standards and can be fixed by screws *
(Fig. 8).
In order that the stroke or lift of the chisel holder be always the same, (in spite of
the difference in the thickness of the several files) and the changed position of the
lever I have made the arrangement that the key face g mentioned above
(therefore the plates g* connected to it) may slide up and down upon the lever
this is also automatically effected for such files as become thicker towards the
middle.
Upon the cross shaft k journalled in the standards a' is mounted a lever k¹ which
is connected by means of the link with the common pressing down device (con-
sisting of the levers and k and the spring k³).
On the other side is attached to the shaft ka lever which is connected by means
of the rod and bolt to the key plates g.
When thus the shaft k is turned, the key g' g³ is raised or lowered upon the lever g'
and the adjustment of the lever is altered accordingly.
The shaft k may also be turned by means of the hand lever (shown in dotted lines)
which is attached theroto at the outside of one of the standards.
The device for bolding the file upon the carriage is contrived in the following
manner. Upon the earringe f is fastened, at the fore part an open forked bearing m
in-the-forks of which rest the pivots of a hold fast or jaw m² the mouth of which
widens towards the file.
The file is clamped by means of a screw m³ (see Figs. 6 and 7). In order to hold
the file at the rear part there is provided a shoulder or block me sliding in the rear
part of the carriage which shoulder may be pressed by means of a screw m° towards
the file to hold the latter (see Fig. 5).
In order to turn the chisel about a horizontal axis (for instance when the file should
happen to be inclined) there is attached to the backward extremity of the chisel
holder a worm wheel segment (Fig. 8) with which gears a worm journalled in
bearings fixed to the chisel shaft i and adjustable by means of a hand wheel.
In order to give to the edge of the chisel any desired inclination in relation to the axis
of the file I employ the arrangement shown in Fig. 8. The chisel holder receives the
round shank n of the chisel in a semicular recess opposite to which is a sliding jaw n¹
which has also a semicular recesses and can be pressed by means of a screw n² towards
the neck n of the chisel so that the latter is fixed as in a vico.
It is obvious that the details of construction may be varied without departing from
the principle of my invention.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is.
1. In a file cutting machine having a hammer and a chisel supported upon an arm
of a shaft or similar rocking frame the arrangements of the journals or pivots of
said shaft or frame to be adjusted according to the thickness of the file substantially as
set forth..

page_text: 2. In a file cutting machine having a hammer and a rocking chisel frame the com-
bination with the chisel frame of the lever g¹ the key sliding upon the same,
said
key being lifted or lowered simultaneously with the pressing down device (kk² k³ kk),
and the arm and screw ge or equivalent device mounted upon the chisel substantially
as and for the purpose set forth.
3. In a file cutting machine having a hammer with air cushion cylinder c the device
for regulating the blow of the hammer block consisting of. the spindle c, lever c³
rod c and valve c¹ substantially as set forth.
4. In a file cutting machine having hammer and chisel the device for mounting
the file upon the carriage consisting of the jaw m2 journalled in forked bearings
and of the jaw m sliding in the carriage f and adjusted by means of a screw
spindle mt.
5. In a file cutting machine with atmospheric cylinder the device for turning the
chisel holder (for inclined files) consisting of the worm wheel segment * which
engages with the worm journalled in bearings attached to the chisel shaft substantially
as set forth.
6. In a file cutting machine with atmospheric cylinder the device for enabling
the edge of the chisel to be turned or inclined consisting in the combination with
the chisel of the shank n of circular cross section, the fixed jaw n, the sliding jaw n¹
and the screw n substantially as illustrated and described.
7
Dated this 16th day of February 1889.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.