Improvements in Carving or Cutting Machines.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Carving or Cutting Machines.
A communication from THE MILWAUKEE CARVING COMPANY, of Milwaukee,
State of Wisconsin, United States of America.
I, ALFRED JULIUS BOULT, of 323, High Holborn, in the County of Middlesex,
M.I.M.E., 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 this invention is to duplicate carvings and to produce carvings
from a pattern by tracing the pattern with a guiding tool which controls and
imparts a similar movement to the cutting or carving tool or tools.
It consists essentially of certain peculiarities in the construction and arrangement
of the tool supporting and guiding mechanism and of the mechanism driving the
cutting tool or tools hereinafter specifically set forth and pointed out in the claims.
In the accompanying drawing like letters designate the same parts in the
several figures.
Figure 1 is a perspective view of this improved carving machine complete ;
Fig. 2 is a front elevation on an enlarged scale of the tool carriage and its
connections, and
Fig. 3 is a cross section of the same in a plane intersecting one of the cutting
tool holders axially when the same is in a position at right angles to the axis of the
carriage.
A is the frame of the machine provided with ways upon which the work table B
is supported and arranged to slide. It is provided at its rear end with an upright
frame or standards A A', which are turned forward at their upper ends and
form overhanging brackets or arms. C is a stiff quadrangular frame suspended
at one side on cone pointed bolts from the upper overhanging ends of the
standards A¹ A'. G is a quadrangular frame or yoke swiveled at the ends in the
lower part of frame C upon cone bearings 9 g.
HH are vibratory arms expanded, and thereby stiffened, vertically at their ends,
which are pivoted in the frame or yoke G near its ends on cone bearings h h.
J is a round cross shaft or rod formed or provided at its ends with cross heads jj,
which are pivoted between the bifurcated front ends of the arms H H on cone
pointed bolts 12. The yoke G, arms H H and rod or shaft J together constitute
a jointed parallelogram in which the shaft J is capable of free endwise and vertical
movement, but is constantly held parallel with the axis of yoke G. By connecting
this jointed parallelogram with the free side of the suspended vibratory frame C,
the shaft is rendered capable of free lateral movement in all directions as well as
vertically.
Upon the rod J is mounted the sleeve K, which is revoluble thereon and bears
at its ends against the cross heads jj, as shown most clearly in Fig. 2. The rod J
and sleeve K together constitute a tool carriage.
NN are tool holders provided with jaws or other suitable fastening devices (not
shown in detail) for securing the tools therein, and externally screw threaded to
engage and work with corresponding internally screw threaded boxes L L, which
are pivoted on screws to the revoluble sleeve K, as shown in Fig. 3, so as to
permit of their inclination at any desired angle thereto.
The tool holders N N¹ are thus made adjustable axially with reference to the
sleeve K, and they are furnished with jam nuts n n by which they are locked in
place when properly adjusted. These boxes L L are made with caps or in halves

page_text: to permit of the insertion of the pivot screws 11, by means of which they are
secured to the revoluble or oscillatory sleeve K, and they are formed with
upwardly projecting arms, which are connected by a rod k with each other,
thus causing the inclination of either tool holder to produce a like inclination of the
other to the tool carriage, as indicated by dotted lines, Fig. 2.
In the machine illustrated in the drawing, two cutting tool holders N N are
located, one at each end of the carriage, and the guiding tool holder N¹ connected
with both by the rod is located for convenience of manipulation midway between
them.
It is obvious that the carriage supporting and guiding mechanism consisting of
the frame C, yoke G and arms H H hereinbefore described, permits of the free
universal movement of the front ends of the arms H H, while the rod J connecting
them is constantly maintained by the same means parallel with a certain fixed line.
Between the uprights A A' at or near the top of the same, a quadrangular
frame D is pivoted at its ends on cone bearings d. This frame D is furnished with
bearings for, and carries two vertical driving shafts ff, each provided with a larger
and smaller pulley F and 1. Upon the extended ends of the shafts ff are hinged
the forked or bifurcated yokes D D, which are formed at the junction of their
converging limbs with sleeves for the reception of rods e e longitudinally adjustable
therein.
These rods e e carry at their front ends, in suitable heads provided for the
purpose, sheaves e e', to the lower extended journals of which are attached flexible
shafts I connecting them with the rotary spindles in tool holders N. N. The
arm extends rearwardly from the pulley frame D and is provided with an
adjustable weight which counterbalances the weight of the arms e e and shafts | I
on the opposite side of said frame.
The weight of the tool carriage and its carrying arms H H may be supported, if
desired, by any suitable counterbalancing device, which will not interfere with the
freedom of their movement. The pulleys F F are connected by belts (not shown)
with the sheaves eel, and the pulleys are in turn connected in like manner
with any suitable source of power, so as to rotate the cutting tools in opposite
directions and thereby balance the tendency of said tools to creep along the work,
and move the carriage from any given position or line in which it is held or
directed by the operator. The several cone bearings employed in the machine are
made adjustable to take up wear.
represents a pattern and blanks to be carved, secured to the sliding bed B
in any suitable manner in the proper position to be operated upon by the guiding
tool and the cutting tools 00.
The operation of this improved machine may be described as follows:
The pattern and blanks having been properly secured to the bed B, as herein-
before described, and the proper tools secured in the several tool holders N N',
and the latter adjusted so as to bring the working portions of the tools in the same
line, the driving mechanism actuating the cutting tools OO is set in motion and
the guiding tool O' moved by the operator over the pattern. The guiding tool
traversing the pattern produces simultaneously like or similar movements of the
cutting tools OO over the work.
By turning the sleeve K upon the rod J and swinging the tool holders laterally
on their bearings the tools may be inclined in any direction from a perpendicular
to the work and pattern so as to produce undercuts in the carving.
A universal movement of the several tools by which the surface of the pattern
and work is traversed laterally in all directions and elevations and depressions
therein are followed is permitted by the jointed connections of the tool supporting
and guiding mechanism. Various sizes and kinds of tools may be used to
advantage in producing different kinds of carvings or in different stages of the
same piece of work.
By moving the table B on its ways the tracing of a long pattern is facilitated.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, and in what manner
the same is to be performed, I declare that what I claim is :-
1. In a carving machine the combination of a rigid vibratory frame suspended
on suitable bearings, an oscillatory yoke supported in said suspended frame by
bearings in a line parallel with the bearings of said frame, vibratory arms hinged
in said yoke on axes transverse to its axis of oscillation and guiding and cutting
tools connected with said vibratory arm, substantially as and for the purposes set
forth.
2. In a carving machine the combination of a tool carriage revoluble upon its
axis, a guiding and a cutting tool connected therewith and guiding mechanism
connected with said tool carriage, substantially as and for the purposes set forth.
3. In a carving machine the combination of a tool carriage capable of oscilla-
tion upon its axis, tool holders having a jointed connection with said carriage, a
guiding and a cutting tool adapted to said holders and guiding mechanism con-
nected with said carriage, substantially as and for the purposes set forth.
4. In a carving machine the combination with a supporting frame and work
table of a rod connected at its ends with said frame by jointed guiding mechanism,
a sleeve supported and capable of oscillation upon said rod, tool holders pivotally
connected with said sleeve, and a guiding and a cutting tool carried by said tool
holders, substantially as and for the purposes set forth.
5. In a carving machine, the combination with a suitable supporting frame of a
tool carriage composed of a shaft, and a sleeve capable of oscillation thereon,
jointed guiding mechanism having jointed connections with the ends of said carriage
shaft and with said fraihe; screw threaded boxes pivotally attached to said sleeve,
screw threaded tool holders adjustable axially in said boxes, and guiding and
cutting tools adapted to said tool holders, substantially as and for the purposes set
forth.
6. In a carving machine the combination with a suitable supporting frame of a
frame suspended by suitable bearings thereon, an oscillating yoke supported in said
suspended frame on suitable bearings, vibratory arms supported by and having
jointed connections with said oscillating yoke, a shaft parallel with the axis of said
yoke and hinged to the free ends of said vibratory arms, tool holders mounted upon
said shaft and a guiding and a cutting tool adapted to said tool holders, substantially
as and for the purposes set forth.
7. In a carving machine the combination with two or more cutting tools, of a
guiding tool connected therewith so as to control the movements of said cutting
tools, guiding mechanism connecting said tools with a suitable fixed support so as
to permit them to be moved in any direction and at the same time to maintain them
in the same relative position to each other and to the pattern and work, and driving
mechanism arranged to rotate said cutting tools in opposite directions whereby the
tendency of each cutting tool to crawl over the work and to move away from a
given position is balanced by the other tool tending in the opposite direction, sub-
stantially as and for the purposes set forth.
8. In a carving machine, the combination with a rigid vibratory frame hinged
in a horizontal line at one side to a suitable support, of a jointed parallelogram
having a jointed connection with said vibratory frame in a line parallel with the
axis on which said frame swings, and a guiding and a cutting tool connected with
the free side of said jointed parallelogram, substantially as and for the purposes
set forth.
9. In a carving machine, the combination with a suitable supporting frame, of a
vibratory frame suspended therefrom by one side, a jointed parallelogram hinged at
one side to said vibratory frame in a horizontal line parallel with that on which
said frame swings, a tool carriage connected with the opposite, free side of said
parallelogram and a guiding and a cutting tool supported by said carriage, sub-
stantially as and for the purposes set forth.

page_text: 10. In a carving machine the combination with a rigid vibratory frame of a.
jointed parallelogram having a jointed connection therewith in a line parallel with
that on which said frame swings, an oscillatory tool carriage mounted upon the
free side of said parallelogram and a guiding and a cutting tool connected with
said carriage, substantially as and for the purposes set forth.
11. In a carving machine, the combination with a rigid vibratory frame hinged
in a horizontal line to a fixed support, of a jointed parallelogram having a jointed
connection therewith in a parallel line, an oscillatory tool carriage mounted upon
the free side of said parallelogram and connected guiding and cutting tools having
jointed connections with said carriage, substantially as and for the purposes set
forth.
a
12. In a carving machine, the combination with a rigid swinging frame having
a jointed connection with a suitable fixed support, of vibratory arms having
universal joint connection with said swinging frame, a tool carriage hinged to the
free ends of said vibratory arms, and a guiding and a cutting tool, substantially as
and for the purposes set forth.
13. In a carving machine, the combination with a universally movable tool
carriage provided with a guiding and two or more cutting tools, of a pulley yoke
capable of oscillation on a horizontal axis and provided with a weighted arm, two
or more vertical pulley shafts journaled in said yoke and forked arms hinged at
their forked ends to said pulley yoke concentrically with said pulley shafts and
provided at their free ends with sheaves which are connected with said cutting
tools, substantially as and for the purposes set forth.
14. In a carving machine the combination of a rigid frame capable of oscillation
on a horizontal axis,. a tool carriage provided with a guiding and one or more
cutting tools and vibratory arms having jointed connections at opposite ends with
said oscillatory frame and with said carriage, substantially as and for the purposes
set forth.
15. In a carving machine the combination of a rigid frame capable of oscillation
on a horizontal axis, vibratory arms having jointed connections with said frame, a
tool carriage having jointed connections with the opposite ends of said arms a
guiding and a cutting tool carried by said carriage, and driving mechanism con-
necting the cutting tool with a suitable source of power so as to conform to the
movement of said carriage, substantially as and for the purposes set forth.
16. In a carving machine the combination with a rigid frame capable of oscilla-
tion on a fixed horizontal axis, a tool carriage connected with said frame by
vibratory arms, tool holders provided with a guiding and a cutting tool and having
jointed connections with said carriage and driving mechanism connecting the
cutting tool with a suitable source of power in such manner as to conform to the
movement of said carriage, substantially as and for the purposes set forth.
17. In a carving machine the combination of a frame capable of oscillation on a
horizontal axis, a yoke carried by said frame and capable of oscillation on an axis
. parallel to that upon which said frame swings, a tool carriage connected with said
yoke by vibratory arms which have jointed connections therewith, and a guiding
and a cutting tool carried by said carriage, substantially as and for the purposes
set forth.
Dated this 10th day of March 1891.
W. P. THOMPSON & BOULT,
Agents for the Applicant.