Improvements in Saw Filing Machines.
Year: 1892

page_text: Date of Application, 13th Sept., 1892-Accepted, 15th Oct., 1892
COMI LELE DIECIFICATION.
Improvements in Saw Filing Machines.
I, GEORG OTT of Ulm, Wurtemberg in the Empire of Germany, Manufacturer,
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 in saw filing machines, and has for its
object to effect the lifting of the file in such a machine during the return motion in
a simple and sure manner.
The new improvement is illustrated on the accompanying sheet of drawings, in
which:-
Figure 1 is a front view of a machine showing the improvement.
Figure 2 is a plan view partly in section.
Figure 3 is a sectional view on the line A B of Figure 2, with lifted or raised
sliding bar f.
Figure 4 is a sectional view on the line C D.
Figure 5 represents lever 2 out of contact with cam or groove 1, and the sliding
bar in working position.
Figure 6 is an elevation of the driving wheel g with cam 1.
Upon the frame of the machine is journaled in two hearings a shaft 8, upon
which are mounted two levers 3 and 3*.
The former of these levers has a second arm 2 sliding upon a cam 1 of the
driving wheel g. Both lever arms 3 and 3* engage in recesses of the sliding bar f
to lift the same during the free return motion of the file.
On the opposite side of the machine frame is adjustably attached the sliding
bar upon an inclined surface 5 upon two screws 7 and 7".
The inclined mounting
of the sliding bar f has for its object to render possible the raising and lowering of
the file, secured to the carriage g¹, according to the inclined position of the teeth
of the saw.
The machine works as follows:-
When the driving wheel g is rotated, the cam or groove 1 depresses the lever
arm 2, so that the lever arm 3 and the sliding bar f, with the file carriage, are
raised or lifted and a free return motion of the file is effected (see Figure 3).
As soon as cam or groove 1 has left the lever arm 2, the latter, together with the
lever arm 3, returns into its original position.
The sliding bar f is thus disengaged and is returned with the file carriage g¹
into the working position.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a saw filing machine, the application of a cam or groove 1, attached to the
driving wheel g, said groove or cam operating (by sliding upon lever 2) a shaft 8,
which is provided with two lever arms 3 and 3ª so that the sliding bar f, together
with file carriage g¹, is raised or lifted during the entire return stroke; substantially
as described.
2. In a saw filing machine of the hereinbefore described kind, the inclined

page_text: journaling of the sliding bar f upon the surface 5, so that the raising or lowering
of the file is effected in the inclined position of the teeth; substantially as described.
Dated this 12th day of September 1892.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.