Improvements in Saw Sharpening and Setting Machines.
Year: 1889

page_text: Date of Application, 12th Apr., 1889
Complete Specification Left, 11th Feb., 1890-Accepted, 15th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Saw Sharpening and Setting Machines.
1, AUGUST TITSCHER of Schoenstein, near Cilli, Styria in the Empire of Austria,
Joiner, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements on the saw sharpening and setting machine
described in the specification of my former Letters Patent No. 4551 dated
March 24th A.D. 1888 and essentially consists in the substitution, for the rotating
file disk, of a straight file, having a reciprocating movement, the feed motion and
setting mechanism being the same as in the machine referred to.
The improved device consists of a guide bar, receiving its to and fro movement
from the driving shaft by aid of a crank and connecting rod or by any other
suitable means. Said guide bar carries at its free extremity, vertically adjustable
therein, the file holder which, in order to admit of an axial displacement of the file,
may be adapted to receive a file with a round gudgeon.
In order to cause the file to be depressed on the forward stroke of the guide bar
and to be raised on its return stroke, the guide is moveable in or about its middle on
a trunnion and connected on its rear side at the top with a lover actuated by a cam
mounted on the driving shaft and at the bottom with a suitable spring, counteracting
said cam.
On the forward stroke, the file is depressed by the action of said spring while it is
raised on the return stroke by the pressure produced by the cam and lever on the
rear part of the guide.
To obviate friction, the lever may be provided with a suitable friction roller.
In using the improved machine, which is applicable to saws of every kind, I may
employ either ordinary triangular files or such with special cross section, for
simultaneously sharpening two edges of the blade. The latter passes through the
machine as often as is required for its sharpening.
TOLL
A 1000
HUELSER & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Saw Sharpening and Setting Machines.
I, AUGUST TITSCHER of Schoenstein, near Cilli Styria, in the Empire of Austria,
Joiner, 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:-
This invention relates to improvements on the saw sharpening and setting machine
described in the specification of my former Letters Patent No. 4551 dated
March 24th A.D. 1888 and essentially consists in the substitution, for the rotating
file disk, of a straight file, having a reciprocating movement..
In the improved machine the setting mechanism in its essentials is the same as in
the machine above referred to, while the feed motion device is somewhat modified.
Reference being had to the accompanying drawing
Fig. 1 is a vertical longitudinal section, showing the mechanism for the to and fro
motion and lifting of the file;
Fig. 2 is a similar section showing the setting mechanism;
Fig. 3 is a plan and partial section of the improved machine; and
Fig. 4 is a cross section showing the feed motion mechanism.

page_text: The improved device consists of a guide bar a receiving its reciprocating move-
ment from the driving shaft 6 by means of a crank disk c or crank and connecting
rod d or by any other suitable. means.
Said guide bar à carries at one end the file-holder f, having two sockets, one of
which serves to receive the file f*, while socket f' is adapted to receive a screw f³
for fixing the file in its socket.
In order to cause the file to be depressed on the forward stroke of the guide
bar and to be raised on its return stroke, the guide a¹ is movable in or about its
middle on a trunnion g, rigidly connected with a rocking lever h, which carries at
its free end a friction roller h¹. A spring i tends to press said rocking lever against
a cam k. On the forward stroke the file is depressed by the action of said spring,
while it is raised on the return stroke by the pressure produced by cam k and lever h
on the rear part of the guide a¹.
The feed motion is effected by means of pawl I, actuated by levers m¹ m² m³ and
grooved crank disk n.
The setting lever o receives its rocking or oscillating movement by means of rod p
and grooved cam disk q.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
In a saw sharpening and setting machine, the combination with a file holder f
of a guide bar a, guide a¹, trunion g, lever h, spring i and cam k for the purpose of
imparting to the file a reciprocating movement, while causing it at the same time
to be depressed on its forward stroke and raised on its return stroke, substantially as
illustrated and described.
Dated this 11th day of February 1800
AUGUST TITSCHER.
By Huelser & Co.,
142, Fleet Street, London, Attorneys.