Improvements in the Construction of Wood Sawing Machines.
Year: 1891

page_text: Date of Application, 20th May, 1891
Complete Specification Left, 20th Feb., 1892-Accepted, 26th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Wood Sawing Machines.
1 NOEL NEWALI. HAIGH of the firm of W. B. Haigh and Company Limited
Globe Works Oldham in the County of Lancaster Machinist do hereby declare the
nature of this invention to be as follows:-
:-
This invention relates to machines for sawing wood, and chiefly to those in
which two saws are or may be worked simultaneously, the object being to make a
better balanced and consequently more smoothly working machine than has hitherto
been produced, and one which is most convenient and readily applied in what
position the shafting which is to drive it may be situated.
According to my invention, instead of connecting the saw frame by a rod directly
to a crank shaft, wheel, or disc (as is usually the case in machines of the above
description) and mounting the said crank or disc in a horizontal position I connect
the saw frame or frames by means of a rod or rods to a lever or levers the boss
or bosses of which can slide upon and be actuated by a vertical rocking shaft.
This rocking shaft is worked through a lever and connecting rod by a crank pin
rotating in a horizontal plane upon a short vertical spindle driven by bevil gear
from a main shaft, which can therefore be fixed in any convenient position to be
driven by strap and pulley from the existing shafting of the mill or other place
where it is required to be used.
In a double sawing machine the two rods actuating the saw frames are connected
to arms or levers set exactly opposite to each other on the vertical rocking shaft
above named and thus the machine is perfectly balanced and will work very evenly
especially as the thrust of these levers is in the same plane as the motion of the
saw frames; whereas in the case of a crank whether on a shaft wheel, or disc, as
now ordinarily in use, the thrust of the connecting rods, especially at its more
effective part, is always inclined with regard to the plane of action of the saw
frames and consequently vibration is produced and uneven motion results.
The rising and falling of the saws is also rendered more easy by my arrangement
as the moving parts are lighter and fewer than before.
Dated this 10th day of May 1891.
GEO. DAVIES & SON,
4. St. Ann's Square, Manchester, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Wood Sawing Machines.
I NOEL NEWALL HAIGH of the firm of W. B. Haigh and Company Limited
Globe Works Oldham in the County of Lancaster Machinist, 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 machines for sawing wood, and chiefly to those in which
two saws are or may be worked simultaneously, the object being to make a better
balanced and consequently more smoothly working machine than has hitherto been
produced and also one which is most convenient and readily applied no matter in
what position the shafting which is to drive it may be situated.
My invention will be readily understood on reference to the accompanying
drawings,
Fig. 1 being an elevation and Fig. 2 a plan view of a double horizontal sawing
machine constructed according to my invention.

page_text: Instead of connecting the saw frame by a rod directly to a crank shaft, wheel, or
disc (as is usually the case in machines of the above description) and mounting the
said crank or disc on a horizontal axis, I connect the saw frame or frames a by
means of a rod or rods a¹ to a lever or levers the boss or bosses of which can
slide upon and be actuated by a vertical rocking shaft c.
This rocking shaft is worked preferably through a lever d and connecting rod
by a crank for a crank pin rotating in a horizontal plane upon a short vertical
spindle J. driven by a pulley h or by bevil gear, from a main shaft. This vertical
spindle can be fixed at the back of the sawing machine or in a line therewith or at
the front thereof according to the position of the existing shafting of the mill or
other place where it is to be used. It may evidently also be mounted hori-
zontally instead of vertically and driven directly from any horizontal shaft in
the mill. This adaptability of the separated shaft or spindle y crank and con-
"
necting rod in various positions is very convenient in places where the space
available for the sawing machine is limited.
In the double sawing machine shewn on the drawings the two rods a a
actuating the saw-frames, a are connected to arms or levers set exactly
opposite to each other (see Fig. 2) on the vertical rocking shaft c above named,
and thus the machine is perfectly balanced and will work very evenly, especially
as the thrust of these levers is in the same plane as the motion of the saw
frames whereas in the case of a crank whether on a shaft, wheel or disc, as
now ordinarily in use, the thrust of the connecting rods, especially at its more
effective part, is always inclined with regard to the plane of action of the saw
frames and consequently vibration is produced and uneven motion results.
The levers are caused to rise and fall with the slides carrying the saw
frames a by means of the curved brackets between which the said levers b
work.
The rising and falling of the saws, the position of one of which in the frame a is
shewn on Fig. i at a where it is attached to the said frame in the usual manner,
is also rendered more easy by my arrangement, the moving parts being lighter and
fewer than before as will be readily seen on reference to the drawings.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
1. The combination of a saw frame, connecting rod and lever rising and falling
with the said frame, the said lever being mounted upon, and actuated by a vertical
rocking shaft substantially as herein before described.
2. The combination with the above named rocking shaft of a lever and connecting
rod and a crank or its equivalent on a separate short spindle or shaft the position
of which can be adapted substantially as and for the purposes hereinbefore
described.
3. A double sawing machine constructed substantially as hereinbefore described
and illustrated by the annexed drawings.
Dated this 19th day of February 1892.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.