Improvements in Carving Machines.
Year: 1891

page_text: Date of Application, 23rd 0:, 1991-Accepted, 28th Nov., 18.91
COMPLETE
Improvements in Carving Machines.
A communication by WILLIAM CHARLES LAYER, of No. 172, 21st Street, in the
City of Milwaukee, County of Milwaukee and State of Wisconsin, United
States of America, Manufacturer, EDWARD ULYSSES TAYLOR, of Fond du
Lac, Fond du Lac County, State of Wisconsin, U.S.A., Manufacturer, and
WILLIAM HENRY ROLPH, of 172, 21st Street, Milwaukee, aforesaid, U.S.A.,
Manufacturer.
I, WILLIAM PHILLIPS THOMPSON, F.C.S. M.I.M.E. of the Agency for
Foreign Patent Solicitors, 6 Lord Street Liverpool and 6 Bank Street
Manchester, both in the County of Lancaster and 323 High Holborn in the County
of Middlesex, Civil 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 :-
This invention relates to improvements in that class of carving machines in which
a guide or tracer bearing on the surface of a pattern or model is used to direct and
control the movements of one or more cutting tools having simultaneous and
corresponding motion to cut or carve articles in the same form as the pattern.
A principal object attained by the improved machine is the capability of making
an undercut, thus forming an overhanging ledge or projecting part in the article
carved, and the invention consists chiefly in the construction and arrangement of
the mechanism and parts thereof whereby this object is accomplished.
Referring to the drawings accompanying this Specification,
Figure 1 is a side elevation of the complete machine.
Figure 2 is a front elevation of the same machine, parts being broken away for
convenience of illustration.
Figure 3 is a top plan view of the complete machine, parts being broken away
for convenience of illustration.
Figure 4 is a detail of the tool-carrying and operating mechanism mostly in
section.
Figure 5 is a top plan view of the spindle-carrying yoke and thereon supported
parts, the side rails of the sash in which the yoke is pivoted and those parts of the
arm in which the sash is supported being shown in transverse section.
The mechanism is constructed and arranged to be conveniently attached to and
supported on a vertical wall A. A driving shaft B journalled in a bracket affixed
to the wall carries thereon the fast and loose pulleys B', on which the power
supplying belt runs. The shaft B also carries the fast power transmitting
pulleys B B Power transmitting belts C¹ run on the pulleys B, and also on
pulleys therefor on the countershafts C. The machine is preferably so arranged
that the countershafts C are located one at each side of the shaft B and are
journalled in brackets fixed to the wall A. Swinging arms D are pivoted at their
inner ends on the shafts C and arms E are pivoted to the arms D at their outer
ends so as to swing horizontally and in the plane of motion of the arms D.
The
The frames or sashes F reciprocate vertically in ways therefor in the outer ends
of the arms E. A connecting rod G is pivoted at its ends to the respective
sashes F in the ends of the arms E, and the connecting rod G¹is pivoted at its ends
on the pins I which severally pivot together the arms D and E in sets.
arms E are of equal length and the rods & and G' are also of equal length, so that
the arms E E and rods G and G₁ form a jointed parallelogram. The sashes F
are counterpoised by weights K on tilting beams L pivoted medially on posts
projecting upward from the arms E, the sashes being supported by flexible straps
secured to the upper ends of segmental heads on the tilting beams.

page_text: Each of the sashes F carries a revolving cutting tool M, operated through
mechanism supported on the sash. The cutting tools M are secured in the
extremity of a revolving spindle N having its journal bearings in the spindle
frame O, which spindle frame O is pivoted by the pins 010" in the yoke P, which
yoke is journalled in the sash F, the axis of the yoke being at right angles to the
axis of the spindle frame and the spindle and tool being in a radial plane of
the axis of the yoke. A friction.gear N' fixed on the spindle N bears against the
pulley R journaled in the yoke P, in the axis of the spindle frame O. The pins O
and by which the spindle frame O is pivoted in the yoke P are made adjustable
end wise in the spindle frame and bear at their ends against the arbor of the pulley R
whereby the pins are adapted to take up any wear between the gear N₁ and a
pulley R and to adjust the pulley R towards and from the gear N'. The pin O' is
provided with a screw thread which turns in the spindle frame and the pin O" is
held in place by a plate cap Q secured adjustably to the spindle frame by screws.
Belts S running on pulleys therefor on the shafts C and pins I respectively, and
belts S running on the pulleys on the pins I and on pulleys R transmit the required
rotary motion to the cutting tools.
A connecting rod T is pivoted at its respective ends to the spindle frames O and
serves to hold the spindle frames to concurrent movement. A guide or tracer U is
pivoted to the connecting rod T medially and is also connected by universal joint V
to a stud W on the connecting rod G.
By the construction and arrangement of the arms D and E and the connecting
rods G and G' the cutting tools M are permitted to move in any direction in a
horizontal plane and by the vertical movement of the sashes F the tools are raised
and lowered any desired distance within the limit of their travel, and by the
additional universal movement permitted to the spindle frames by the two hinged
joints at right angles to each other and by which they are connected with the
sashes, the tools are capable of being tilted to any desired angle, and being con-
nected by a rod on which the tracer is pivoted and supported in such manner as to
have concurrent movement therewith, the tools are adapted to cut or carve material
like the pattern or model either in relief or intaglio and therewith making an
undercut if desired.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is :-
1. In a carving machine, the combination with two horizontally swinging arms,
one arm pivoted to the outer extremity of the other arm, of a counterpoised sash
moving vertically in ways therefor in the outer extremity of the outer arm, a
cutting tool supported on the sash in a frame having two pivotal motions one at
right angles to the other, substantially as described.
2. In a carving machine, sets of horizontally swinging arms, other sets of
horizontally swinging arms pivoted to the outer ends of the first set of arms, sashes
moving vertically in the outer ends of the outer arms in ways therein, a connecting
rod uniting the vertically moving sashes in the respective arms whereby the sashes
are moved vertically coincidently and independently of any movement of the
swinging arms, combined substantially as described.
3. In a carving machine a yoke journalled in the sash, a spindle frame pivoted
on the yoke at right angles to its axis, a driving pulley journalled in the yoke, the
axis of which pulley is in the axis of the spindle frame, a spindle having its bearings
in the spindle frame and a friction gear on the spindle bearing against the pulley in
the yoke, all combined substantially as described.
4. In a carving machine, the combination in the tool carrying and operating
mechanism, of a swinging yoke, a spindle frame pivoted on the yoke at right angles
to the axis of the yoke, a pulley journalled in the yoke, the axis of which pulley is
in the axis of the spindle frame, a tool-carrying spindle in the spindle frame and a
wheel or gear fixed on the spindle which wheel is in frictional contact with the

page_text: pulley in the yoke in such manner that its contact is constant and equal in all
movements of the spindle, substantially as described.
5. In a carving machine, the combination of a swinging arm D, a thereto pivoted
swinging arm E, a therein supported movable sash, a therein journalled yoke, a
spindle frame journalled therein at right angles to the yoke, the spindle being in a
radial plane of the axis of the yoke, a pulley in the yoke, the axis of which is in the
axis of the spindle frame, a spindle having its bearings in the frame and provided
with a gear bearing against the pulley in the yoke and a belt running on the pulley
in the yoke, substantially as described.
Dated this 22nd day of October 1891
WM. P. THOMPSON & Co.,
Agents for the Applicant.