Improvements in and relating to Cross-cut Sawing Machines.
Year: 1898

page_text: Date of Application, 28th Dec., 1898-Accepted, 4th Feb., 1899
COMPLETE SPECIFICATION
Improvements in and relating to Cross-cut Sawing Machines.
I, WILLIAM DUFFY, of Gainsborough Road, Victoria Park, London, NE,
Wood-block Flooring and Paving Manufacturer, do hereby declare the nature
of this invention and in what manner the same 18 to be performed, to be par-
ticularly described and ascertained in and by the following statement:-
-
The improvements according to my invention are especially devised with
a view to ensure the production, with great rapidity, perfect accuracy and at
the same time safety to the operator, of wood-paving blocks, and more particu-
larly, those sawn from planks of Australian janah, karri, and other descrip-
tions of dense, hard woods, although, of course, said improvements may be
advantageously availed of in the production of blocks from planks of, relatively,
soft woods, such as yellow pine, deal &c
In accordance with this invention, any number of circular saws may be em-
ployed The plank of wood to be sawn, is fed up or caused to travel, on edge,
in a longitudinal duection, to position in front of the saw or saws, which latter
are advanced, and withdrawn, respectively, in a horizontal direction by means
of a slide which carries the saw spindle or by means of a pendulum or like
device
It is characteristic of, and forms a salient feature in my invention, amongst
others distinctive thereof, that the saw o saws, is, or are, caused to advance
steadily at an uniform speed while cutting through the plank in the duection
of its least scantling or dimension, but, the saw or saws retire rapidly after
each cut has been effected This is attained by an arrangement of cam motion
(or equivalent mechanism for producing the same result) which I adopt, and
ensures a very considerable saving of time occupied in the turn out of the
blocks relatively to that which has been attainable prior to the date of my
invention
**
The saw fence or guard which I employ, 18 devised so as to allow of its being
brought quite close up to the teeth of the saw or saws This feature presents the
advantage of obviating the necessity for a long travel, whilst at the same time
it permits of the fence being readily adjustable when the saws have to be dis-
mounted as occasion may arise
The plank to be operated upon, 18, by automatic feed gear, caused to travel
along, longitudinally, so as to allow of its being advanced at any predetermined
time and desired space I may also gear the rollers in the longitudinal bed or
plate along which the plank is caused to advance, this provision being with a
view to assist the travel of the plank The latter is held or stayed up to the
fence whilst being sawn, by an automatically acting member which in this
connection efficiently performs the functions of the human hand and arm in
holding up as hitherto
The fence is also provided with a movable stop piece worked by a pedal device,
to allow of a "cleaning cut" being sliced off the rough end of the plank to be

page_text: operated upon, as will be hereinafter more fully described in reference to the
accompanying sheet of drawings which I have appended hereto in order that
the nature, objects and advantages thereof may the better be understood.
In the drawings, Figure 1 is a side elevational view of the improved sawing
apparatus according to my invention. Figure 2, plan view; Figure 3, frout
elevational view at sawing end, Figure 4 end elevational view looking from
feeding end of the machine Figures 5, 6 and 7 are detached views (to be
hereinafter identified and described) in illustration of the herein before mentioned
automatic feed gear for imparting the forward movement or travel to the plank
Throughout the several views, the same letters and numerals of reference are
employed to denote like or corresponding parts and members of the complete
device In the drawings, a is the saw bench top; b the hereinbefore referred
to sliding table on which the circular saws (in this case, two) c c are mounted;
6 saw spindle bearings, 68 rollers on which the table travels, c¹ saw spindles;
pulley and diving band c3 passing over pulley c pulley for diving the
gearing for working the sliding table aforesaid driving band to pulley c
driven by ;,, co spindles carrying pullies, cams and gearing; d, d, geared
wheels employed for reducing the working speed ,can and bracket for
operating the sliding table b, spring for giving the return movement to b;
f, plank to be converted into blocks, f, f, f, fence with rollers
movable stop piece herein before referred to as being employed to allow of a
cleaning cut" being sheed off the rough end of the plank simultaneously with
cutting the blocks; g¹ spring in connection with the movable stop 9; 9³ and 9³
lever and pedal respectively, for operating g; h spring clamping arm for holding
the plank up to the fence while being sawn, h¹, h³, h³, ate, respectively, crank
and levers of the mechanism connected with the working of the stop, and spring
clamping arm aforesaid: h is a spring employed to cause the return of the
clamp (see Figure 3); h³ cam working in contact with sheave at end of lever h³
of the mechanism connected with the working of h, al is an adjustable bracket
carrying the movable atop 9 aforesaid and stop piece a, a forms a fence between
the saws.
a slotted bar for the carrying and adjustment of the members al
and a³, a is an articulation formed on as and which swings on the joint at a to
facilitate the changing of saws, a³, standard at outer end of a³.
"
g is the
Tho
Reverting now to the hereinbefore mentioned automatic arrangement of
mechanism for feeding the plank up to the saws This forms an attachment in
connection with the bench top a, and is illustrated by the detached views
Figures 5, 6 and 7, the drawing in the last named figure being to an enlarged
scale relatively to Figures 5 and 6, in order to allow of the better identification
of some of the members of said mechanism. proceeding to describe which; the
bent slide rod ¹ is operated by the cam i, on sheave at end of 1; the interposition
of the spiral spring, serving to keep the sheave in contact with the cam
strength or resilience of the spring is regulated by an adjustable nut 13 The
rack on end of operates the pinion to which engages with quadrant 28,
working the rack 7 backwards and forwards. the forward motion jams the
toothed cam or pushe 2 by means of spring 18 against the plank f; and so
feeding the latter forward As shewn Figures 6 and 7, the joint piece carries
at one end the fluted cam pusher ", and, at the other end, the sheave, the
latter guiding the rack by means of the guide plate fixed to bed plate a;
the rack being, on the return motion, drawn back without moving the plank.
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
I claim is.
First The automatic feed gear substantially as herein described in reference
to Figures 5, 6 and 7 of the accompanying sheet of drawings.
Second-The movable stop g and arrangement of mechanism for actuating
same to allow of a 'cleaning cut" being sliced off the rough end of the plank
"6

page_text: simultaneously with the cutting of the blocks thus ensuring the least possible
loss of time and involving only the loss of one block in each plank
Third: The arrangement of mechanism hereinbefore described and identified
in reference to Figures 1, 2, 3 and 4, for imparting the reciprocatory movement
to the sliding table, carriage, or equivalent with the objects in view all as here-
inbefore set forth.
Fourth-The arrangement of clamping device and connected parts or
members, for holding the plank firmly against the fence during the operation of
cutting, operating in lieu of the human hand and arm, and performing the
functions thereof all as herein before set forth and identified in reference to
Figures 1, 2, and 3, and more particularly in Figure 3.
Fifth. In cross-cut sawing machines the combination therewith, of the several
improvements included in the preceding four claiming clauses substantially as
herein described and for the purposes set forth
Dated this 22nd December 1898.