Improvements in or appertaining to Mechanism for Sawing or Cutting Stone.
Year: 1893

page_text: Date of Application, 16th Aug., 1893
Complete Specification Left, 15th May, 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to Mechanism for Sawing or
Cutting Stone.
I, JOHN SMITH of Lawkholme Works, Keighley in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows, that is
to say:-
It relates to Improvements in or appertaining to Mechanism for Sawing or
Cutting Stone and consists, firstly, of the application of means whereby the frame
carrying the saws or blades may be regulated to follow an approximately straight
course downward from its highest position to its central position where it is in
about the same plane as its operating crank, and thence to its lowest position where
it finishes its operations; and secondly, of the employment of means whereby the
saws or blades may be readily adjusted and firmly held in the most desired and
appropriate positions throughout their entire courses through the stone they are
sawing or cutting.
I attain the object of the first part of my invention by forming the central part
of the coupling pin, which joins the operating connecting rod to the saw frame,
eccentrically with its end parts, the strap of the connecting rod passing over the
former while the latter are mounted in the projecting pieces formed on the saw
frame, so that when said frame is in its highest position this pin is turned to bring
its central part towards the rod's operating-crank while as it descends towards its
central position the pin is gradually turned towards its position which is dia-
metrically opposite its said first position, thus on reaching this position the distance
between the centre of the crank's sweep and the centre of attachment of the
connecting rod to the saw frame, is least as it ought to be, since at this part said
crank and said saw frame are in the same horizontal plane. As the saw frame
continues to descend the eccentric pin is further turned so that when said saw
frame has reached its lowest position, said pin will have assumed the same position
that it occupied when said frame was in its highest position.
The rotating of the eccentric pin may be effected manually by the attendant or
it may be performed automatically by mounting a toothed wheel thereon to operate
in connection with other wheels gearing with a rack suspended from the upper
part of the machine in order that it may oscillate when and as the saw frame
oscillates.
Respecting the second part of my invention I arrange that part of the saw frame
to which the blades are attached, to carry an additional part upon which I mount
suitably shaped bolts at right angles to said blades.
On these said bolts are placed strips of metal which are arranged to intervene
between the blades, and said strips are of sufficient thickness or width or in
sufficient numbers as to keep the blades the desired distance apart when the nuts of
the bolts upon which they are mounted are tightened up; while by said strips
of metal being planed or otherwise made perfectly straight on those faces for
contact with the blades when said strips are held firmly in position they maintain
said blades straight and in the desired vertical plane throughout their entire
operations.
".
Dated this 15th day of August 1893.

page_text: Improvements in or appertaining to Mechanism for Sawing or
Cutting Stone.
I, JOHN SMITH of Lawkholme Works, Keighley in the County of York,
Engineer, 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, that is to say :-
It relates to Improvements in or appertaining to Mechanism for Sawing or
Cutting Stone and consists firstly of the application of means whereby the frame
carrying the saws or blades may be regulated to follow an approximately straight
course downward from its highest position to its central position where it is in
about the same plane as its operating crank, thence to its lowest position where it
finishes its operations, and secondly of the employment of means whereby the saws
or blades may be readily adjusted and firmly held in the most desirable and
appropriate positions throughout their entire courses through the stone they are
sawing or cutting.
In the accompanying sheet of drawings;
;-
Fig. 1 is end elevation of a sufficient portion of the framework and saw carriage
to illustrate my invention.
Fig. 2 is a sectional elevation of the parts shown by Fig. 1 but as seen in the
opposite direction.
Fig. 3 is side view of parts shown by Fig. 1, one portion being shown as
cut away, so that the section of the other may more clearly illustrate its
construction.
Fig. 4 is a similar view to Fig. 3 but shows certain of the parts more clearly.
Fig. 5 is sectional side elevation of a saw blade showing the application of one of
my improved parts more clearly.
Fig. 6 is a top view of the parts shown by Figs. 1 and 2.
I attain the object of the first part of my invention by forming the central
part a' of the coupling pin a, (which joins the operating connecting rod d to the
saw frame b) eccentrically with its end parts a and a², the strap c of the connecting
rod d taking over this part a' while the parts a and a' are mounted in the projecting
pieces e e¹ formed on the saw frame b, so that when said frame is in its highest
position this pin a is turned to bring its said part a¹ towards the rod's operating
crank (which is opposite to the position it is shown by Fig. 3) and as it descends
towards its central position this pin a may from time to time be relieved from the
grip of its holding screws n and to be slightly rotated and again gripped or held by
these screws n so that on it (said saw frame b) reaching its central position this
pin a will have been rotated into its position shown by Fig. 3, in which position the
distance between the centre about which the operating crank rotates and the centre
of the part a¹ of the pin a is less than when said frame is in any other position.
Again as the frame & continues to descend below this central position the eccentric
pin a is rotated in order that when the saw frame reaches its lowest position said
pin a may be brought back to the position it occupied when the saw frame 6 was in
its highest position first before described thus by this adjustment of the pin a the
extremities of the reciprocatory path of motion of the blades f which are carried
by the frame b, lie in an approximately vertical and straight line.
The rotating of the pin a may be effected manually by the attendant or by any
suitable means its said rotary motion may be automatically performed.
Respecting the second part of my invention I arrange the part 1 of the saw
frame to which the blades are attached or secured to carry an additional part g
upon which I mount suitably formed bolts at right angles to said blades.

page_text: On these bolts are placed strips of metal or spacing pieces k which are arranged
to intervene between the several blades f, and said strips k are of sufficient thickness
or width or in sufficient numbers as to keep the said blades the desired distance.
apart from each other when the nuts m of the bolts h upon which they are mounted
are tightened up; while by said strips & being planed or otherwise made so that
their faces for contact with the blades are perfectly straight and parallel to each
other, when said strips are held firmly in position they maintain said blades straight
and in the desired vertical plane throughout their entire operations.
The spacing pieces k may be formed solid except for the openings through
which the bolts h pass, or they may be of the bifurcated form shown by
Fig. 5, which form I preferably employ since it allows same to be detached
and its position, interchanged on the bolts h without displacing or detaching said
bolts h.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. The combination with the moveable carriage of a saw frame of an eccentric
pin for coupling same to its operating rod substantially as specified.
2. In stone sawing machinery the employment of spacing pieces, means for
carrying these pieces and bolts for securing and rigidly holding the blades in
contact with same substantially as specified.
•
3. The combination of the part 9, bolts h, spacing pieces k or k¹ formed as
described, and blades f, substantially as berein set forth and described.
Dated this 12th day of May 1894.
JOHN
SMITH,
Per Samuel Hey,
Agent.