Improvements in Machinery for Carving Wood, Stone, Marble, and other Materials..
Year: 1890

page_text: Date of Application, 20th May, 1890
Complete Specification Left, 20th Feb., 1891-Accepted, 28th Mar., 1891.
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Carving Wood, Stone, Marble, and
other Materials..
We, JOE SAGAR and DONALD SAGAR, of Well Lane, Halifax, Yorkshire,
Wood Cutting Machine Makers, do hereby declare the nature of this invention
to be as follows:
The object of our invention is to carve or form and shape wood, stone, marble,
or other materials from a model or pattern, but the primary purpose of our inven-
tion is to carve the object on an enlarged or reduced size from one and the same
model. To effect this object we employ two horizontal tables upon one of which
we fix the model, whilst the wood or other material to be operated upon is fixed
upon the other table. These tables are connected together on their undersides by
an arrangement of links and rods suitably centred so that when the table upon
which the model is placed is moved horizontally by screw or other means, an
increased or diminished movement is given to the other table carrying the material
to be carved, the increased or diminished movement of the latter table varying
according to the adjustment or centreing of the links or rods employed for the
purpose.
At the back of the above mentioned tables is a vertical shaft capable of
oscillating upon a footstep. Upon this vertical shaft we fix one or more bosses
carrying arms arranged horizontally above the tables. Above the boss or bosses
just mentioned as being fixed on the vertical shaft, is another boss placed loosely
on the said shaft, capable of oscillating independently of the vertical shaft, and
carrying two arms arranged horizontally. To these arms are attached two vertical
hinged and pivoted legs or rods; at the foot of one of such pivoted legs or rods is
an index finger or guide pin, which the attendant traverses over the surface of the
model to be copied, whilst the other pivoted hinged vertical leg or rod carries a
revolving cutter which acts upon the wood or other material to be carved, by
which means an enlarged or diminished shape or configuration of the model is
imparted thereto. The hinged and pivoted leg or rod carrying the index finger
and the rotary cutter are adjustable on their horizontal rods, which permits of the
size of the object being increased or diminished at right angles to the altered sizes
regulated by the tables, whilst the increased or diminished height of the object
being carved is obtained by the vertical adjustments of the index finger or cutter.
Provision is also made for adjusting the point of the index finger to meet any
slightly diminished size of the revolving cutter caused by the same having to be
sharpened occasionally. The horizontal forked rods carrying the index finger and
cutting tool may be attached to a slotted segment link to permit of the said forked
levers being opened further out or brought closer together if desired. The cutting
tool is preferably made spiral, having serrated or saw-like teeth. The several legs
or rods, both horizontal and vertical, necessary to permit the point of the index
finger traversing over the object to copy it, are provided with suitable pivoted and
centred joints, as also are the several rods in connection with the revolving cutting
tool. The pivoted and hinged joints also permit the index finger to follow inclines
and curves or undercut surfaces to allow the revolving cutter to make corresponding
cuts on the article under operation.
By the construction, arrangement, and combination of the parts substantially
described herein, models placed on one table may be reproduced, either the same
size, or increased or diminished sizes, whereby we construct a new and novel
machine of considerable commercial value.
Dated this 19th day of Nov 1890
TASKER & CROSSLEY,
Halifax, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Carving Wood, Stone, Marble, and
other Materials.
We, JOE SAGAR and DONALD SAGAR, of Well Lane, Halifax, Yorkshire,
Wood Cutting Machine Makers, 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 :-―
The object of our invention is to carve or form and shape wood, stone, marble,
or other materials from a model or pattern, but the primary purpose of our inven-
tion is to carve the object on an enlarged or reduced size from one and the same
model; and also to make counterparts, or right and left hand copies of the same
pattern.
A is
Such being the nature and object of our said invention, we shall now proceed to
describe the same with reference to the accompanying sheets of drawings illustrative
thereof, wherein Fig. 1 is front elevation of a machine constructed according to our
invention; Fig. 2 is end view of same; Fig. 3 is plan view, Fig. 4 an underneath
view of the tables, and Fig. 5 is a detail shewing the method of fixing cutter.
the framework of the machine, on the top of which are two sliding tables B and C,
upon the former of which is placed the model or object to be copied from, whilst
the table C receives the wood or other material to be shaped or formed. At the
rear of the tables is a vertical spindle or shaft D on which is placed loosely a boss E
provided with two radial arms F and G carrying bosses H which are capable of
being slided on the said radial arms for purposes hereinafter explained. An
extension of the upright shaft or spindle D is shewn at I upon which is fixed a
boss J, having two radial arms K and L, also carrying bosses M and N, and
brackets or links a to which are hinged by pin b the vertical legs O, P. The foot
of the former carries an index finger or guide pin e, whilst on the foot of the latter
is a revolving cutter d made to rotate at a rapid speed by a cord e passing around
the wharle or pulley . The compound shaft or spindle D. I. is capable of
oscillating, so as to permit the lever arms K and L fixed thereon to sway to and
fro whilst the lower radial arms F and G which are loose on the shaft remain
stationary whereby the vertical legs O and P which are also hinged to the arms F
and G by pin can assume oblique positions so as to permit the pointer c and the
cutting tool d to follow uneven surfaces on the model, and also to permit the
cutter d to undercut and shape uneven surfaces on the wood or other material
being operated upon. Qis a balance weight to give the operative better control over
the radial arms. The tables B and C are made to slide together and in the same
direction when making exact copies of the original model but when making copies
of a different size to the original the tables move in opposite directions, and at
different speeds for the purpose of allowing the cutter to shape its object larger or
smaller lengthwise than the model. The mechanism we employ for this latter
purpose consists of a screw g working in a nut R on the underside of the table B.
I also connect to the underside of the tables two rods S and T capable of working
upon their centres h, such said rods being also provided with blocks U made
adjustable thereon by set screws i. The blocks U are connected together by a
crossbar V so that on the screw g being operated by the handle W the table B
will be slided either backward or forward, such movements being imparted through
the medium of the various bars to the table C, which movement will be more or
less according to the adjustment of the blocks U upon their respective rods,
whereby the object being formed can be increased or diminished lengthwise.
that
The means we employ for moving the tables B and C in opposite directions and
at different speeds is as follows. The lever V is pivoted at and by moving one
of the blocks U towards or from the centre x it follows on actuating screw
one of the tables would move quicker than the other according to the distance of
block from centre x. If the two blocks U are at equal distances from pivot a the

page_text: tables would of course move equally but in opposite directions. When moving
the tables together they are brought into line and clamped; in this case the
blocks U are left to work freely on the levers V T and S, or disconnected altogether.
The increased or diminished size in a direction at right angles to the length is.
obtained by the legs O and P, together with their bosses being slided in one
direction or the other upon their respective oblique rods; whilst the increased or
diminished height of the object being carved is obtained by the vertical adjustment..
of the index finger and cutter.
The horizontal oblique rods carrying the index finger c and cutter d may be.
attached to a slotted segment link to permit of the said rods being opened further
out or brought closer together if desired.
By the construction, arrangement, and combination of the parts substantially
described herein, models placed on one table may be reproduced, either the same
size, or increased or diminished sizes, whereby we construct a new and novel
machine of considerable commercial value. The pivoted and hinged joints also
permit the index finger to follow inclines and curves or undercut surfaces to allow
the revolving cutter to make corresponding cuts on the article under operation.
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 :-
Firstly. In a machine for carving wood and other material the apparatus herein
shewn and described for operating the tables for purposes set forth.
Secondly. In a machine for carving wood and other material, the use of radial.
arms carrying and controlling vertical legs having an index finger and a cutting
instrument arranged and operated in the manner substantially as herein shewn and
described.
Thirdly. In a machine for carving wood and other material, the apparatus herein
shewn and described for operating the tables, in combination with radial arms,
carrying and controlling vertical legs having an index finger and a cutting instru-
ment arranged and operated in the manner substantially as herein shewn and
described.
Fourthly. The general arrangement and combination of mechanism substantially
as herein shewn and described and for purposes set forth.
Dated this 19th day of February 1891.
TASKER & CROSSLET,
Halifax, Agents.