Improvements in Sawing Machines.
Year: 1894

page_text: Date of Application, 27th Nov., 1894
Complete Specification Left, 9th July, 1895-Accepted, 10th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Sawing Machines.
I JOSEPH DAVIS Builder Turleigh Bradford-on-Avon do hereby declare the
nature of this invention to be as follows:-
A new mode of simultaneously obtaining a combination of cutting wood by a
most perfect vertical stroke of saw blades-and by three different lengths of saws-
attached to pivot clamps that moves round in any direction and that the head or
armes has an extension joint at the back-that rises or drops the upper arm-thus
admitting a five-six or a seven inch saw blade-the head or arms are attached to
a vertical shaft moved up and down by a crank arm attached to a rocking beam
with pivot bareings-the whole is driven by two short treadles-attached to
rocking beam and can be moved by the toes of one or both feet whilst the heels
remain on a firm block thus giveing complete steadyness to the operator there is
only one fly wheel at the back this ballances the motion and will drive lathe and
drill attachments the cutting board tilts and will turn to any possition or angle
of the whole circle.
Dated this 26th day of November 1894
I JOSEPH DAVIS, of Turleigh, Bradford on Avon, in the County of Wilts,
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 for improvements in sawing machines has for its object to
simplify the machines whilst giving a perfectly vertical stroke to the saw frame,
to improve the driving motion so as to enable the operator to be perfectly steady
and to make the saw frame readily adjustable to any length of saw.
The saw frame consists of an L-piece forming the lower arm and vertical and
The upper
of the upper arm sliding on the vertical and secured by lock nuts.
arm is further secured by a back stay bolt fixed in a lug near the bottom of the
The front
vertical and entering an open ended slot in the end of the upper arm.
end of the lower arm is rigidly attached to a guide rod joined by a connecting rod
to a crank pin on a vibrating beam connected by two links to the front end of two
pedals pivoted at their rear ends. The pedals are operated by the toe only of the
operator. The connecting rod is adapted to be attached at different points of the
beam to vary the stroke. A fly wheel is also driven by means of crank pins and
connecting rod from the vibrating beam and serves also for driving a drill, lathe,
mandrel or the like. The back of the saw frame is also provided with a small
guide to ensure the frame being always in the same plane.
The table is pivoted to a standard and is tilted by means of a screw pivoted to
the table and passing through a lug on the standard. It is adjusted in the lug by
means of two nuts one on either side.

page_text: In the accompanying sheet of illustrative drawings:
Fig. 1 is a front elevation of a fret machine corstructed according to this
invention, and Fig. 2 is a side elevation and Fig. 3 a sectional plan of the same.
The upper arm a of the saw frame slides on the vertical b formed in one with
the lower arm c and is secured in position by means of the nuts d screwing on the
vertical b. The frame can thus be adjusted to any length of saw.
The upper
arm a is also stayed by the bolt e that is received in a lug on the vertical band
in an open ended slot in the end of the arm a. The nut g serves to fix the stay.
The saw frame is guided by the bars h the bar / passing through the lug m on
the frame of the machine and being connected by the rod n to the vibrating lever o
at any one of the points according to the length of stroke desired. The
lever o is connected by the links to the pedals s pivoted on the crossbar t. The
lever o is also connected by the rod to a fly wheel wo to steady the motion and
which can also serve to transmit motion to a drill or lathe spindle.
The table is pivoted to the standard y and its inclination is adjusted by the
bolt z pivoted to the table and provided with lock nuts bearing against a lug on
the standard.
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
1 claim is:
1. A saw frame for a sawing machine consisting of an upper arm sliding on a
vertical formed in one with the lower arm and fixed by means of lock nuts and
stay bolt, substantially as described.
2. The mechanism for guiding and driving the saw frame consisting of the
parallel guide bars, of the vibrating lever connected to the pedal levers and of
the connecting rod that can be attached to the vibrating lever at any desired point
substantially as described.
3. The arrangement of the table consisting of the standard, the table pivoted to
the standard and the pivoted bolt for fixing the table substantially as described.
4. The improvements in sawing machines substantially as described with reference
to the drawings.
Dated this 9th day of July 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.