Improvements in Machinery for Cutting or Sawing Stone or like Substances.
Year: 1890

page_text: Date of Application, 7th Feb., 1890
Complete Specification Left, 7th Nov., 1890-Accepted, 13th Dec, 1890
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Cutting or Sawing Stone or like
Substances.
We, SAMUEL DEARDEN and WILKINSON DEARDEN; both of Barkerhouse Road,
Nelson, in the County of Lancaster, Stone Merchants and Monumental Sculptors, do
hereby declare the nature of this invention to be as follows:-
":
This invention relates to an improved method of actuating horizontal saw frames
for cutting or sawing stone or like substance, and consists essentially of a vertical
head, placed in front of the machine, and at right angles to the saw frame, to which it
is adjustably attached.
The head may be secured to a horizontal slide piece actuated by a crank and con-
necting arm, or it may be attached to a 'ram, or piston,' and actuated in a to and fro
manner, similar to the piston or ram of a steam hammer; or, the piston may be
actuated by the pressure of water or other fluids.
When therefore the saw frame descends, during the process of sawing in the usual
manner by the unrolling of the suspension chains, the end or point of attachment of
the saw frame to the movable head is lowered gradually down the surface of the
5 latter, and in unison with the descent of the saw frame.
It will be obvious, that by actuating the saw frame, through the 'medium'of the
vertical head, the saws will be better, able to perforin the operation of "sawing than
when the end of the saw frame is being constantly raised and depressed by the crank,
through the varying angles of the crank arm, attached to the saw frame in the
0 ordinary method.
cah dan of 1800
COMPLETE SPECIFICATION.
Improvements in Machinery for Cutting or Sawing Stone or like
Substances.
We, SAMUEL DEARDEN and WILKINSON DEARDEN, both of Barkerhouse Road,
Nelson, in the County of Lancaster, Stone Merchants and Monumental Sculptors, 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 an improved method of actuating horizontal saw-frames
for cutting or sawing stone, marble, granite, slate or like substances; and consists
essentially of a vertical head secured to a horizontal slide or swing-frame actuated by a
crank and connecting arm; or it may be attached to a ram or piston, and actuated in
a to and fro manner, similar to the piston or ram of a steam bammer.
When the saw-frame descends during the process of sawing in the usual manner by
the unrolling of the "suspension chains, the end or point of attachment of the saw-
frame to the movable vertical head is lowered gradually down the surface of the latter,
and in unison with the descent of the saw-frame.
It will therefore be obvious that by the actuation of the saw-frame through the
medium of the vertical head, the saws will be better able to perform the operation of
sawing than when the end of the raw-frame is constantly raised and depressed by the
crank and the constantly varying angles of the connecting rod, attached to the saw-
frame in the ordinary method.

page_text: And in order that our invention may be properly understood and readily carried
into practical effect, we have hereunto attached the accompanying sheets of drawings,
marked with figures and letters of reference; the same letters referring to the same or
corresponding parts in the various views and figures.
Fig. 1. (Sheet 1) is a side elevation of a machine for sawing stone &c., constructed
in accordance with our invention.
A represents the framework or standards of the machine; B the saw-frame, in which
the saws are held between clamps, having hooks by which they are attached to the
frame, and strained by wedges and kept equidistantly apart by iron blocks of the
exact thickness of the slabs to be sawn from the block B mounted on the trolly B².
At the top of the framework is mounted a suitable crane for raising and lowering
the saw-frame, which is suspended at each corner from radius rods C, attached to
chains C, which are wound upon drums C2 of the crane. The parts above enumerate:
are old and well understood and form no part of our invention.
We will now describe the arrangement of mechanism, which, forms the subject of
the present invention. D represents the driving shaft provided with a pair of
cranks E connected by rods F to slide-bars G, which slide in guide-ways formed in
the stretcher H fixed to the uprights A. To the outer extremities of the slide bars
are fixed the vertical heads or head I, which are connected to the saw-frame B by the
slide brackets J and links K.
Suitable tension rods L may be employed to connect the extremities of the
reciprocating heads I to the rear or front part of the slide-bars G to render the heads
more rigid and firm.
Fig. 2 is a similar view to Fig. 1 with the saw actuating mechanism slightly
modified. The horizontal bars G, carrying the reciprocating heads I instead of sliding
in guideways as seen in Fig. 1 are made to radiate at the lower extremities of the
radius arms M which are preferably of the same length as the radius rods C, from
which the saw-frame is suspended.
It will therefore be obvious that the saw-frame B, horizontal bars G and recipro-
cating heads I will swing so as to rise and fall together in unison with each other in
parallel planes during the vibratory movement of the parts; whereby the brackets J,
which form the connection between the saw-frame and the reciprocating heads will
remain undisturbed upon the heads during the vibratory movement of the parts, but
will be capable of freely sliding down the heads during the gradual descent of the
saw-frame to which they are fixed.
Fig. 3. (Sheet 2) is a modification of Fig. 2. In this view only one reciprocating
head I is represented as being used, and placed in a vertical position at the end of the
saw-frame B, and attached to the middle of the end bar of said frame by similar con-
necting parts as in Fig. 2. To the vertical head I is firmly secured the horizontal
bar G, suspended from a beam or girder N by radius arms M. This girder is
supported at one end by the wall O, and at the other by a cross-piece fixed to the
uprights A. Motion is imparted to the horizontal bar G, vertical head I and saw-
frame B from the crank E and crank arm F in a similar manner and for the like
purpose as described in relation to Fig. 2.
It will be evident that in the foregoing arrangements as represented in the various
figures, no angular thrust and pull action will be imparted from the reciprocating head
or heads I to the saw-fraine B, to disturb its parallelism with the horizontal bar or
.bars G.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:—
1. In combination with a horizontal saw-frame B, reciprocating head or beads I,
horizontal slide-bar or bars G operating together with the crank and crank-arm
device, substantially as described in relation to Fig. 1.
2. In combination with a horizontal saw-frame B, reciprocating head or heads I
and horizontal bar or bars G, radiating at the lower extremity of radius arms M, and

page_text: actuated from the crank and crank-arm device, substantially as described in relation
to Figs. 2 and 3.
3. In combination with a horizontal saw-frame B, a reciprocating head I actuated
from a steam ram substantially as described.
Dated this 6th day of November 1890.
THOS. RICHMOND,
Agent.