Year: 1892

page_text: Figs. 5 and 6 are views showing in detail portions of the invention.
Similar letters and figures refer to similar parts throughout the several views.
Referring to the drawings, C C represents a series of rotating face plates
consisting, in the machine shown in the drawings, of the two face plates C C, one
adapted to carry the pattern to be reproduced, and the other the material to be
carved; but it is evident that other face-plates adapted to carry other material to
be carved may be added without substantial alterations except the duplication of
the parts hereinafter described.
The face plates C C are rigidly mounted on the shafts S S respectively provided
with suitable bearings B B and B B in the frame A. Secured to the back of the
respective face plates C C are the worm gears D and D' working into the worms E
and E (E not shown in the drawings) upon the shaft F. The shaft F carries the
pulley P connected by a belt with the pulley P¹ upon the shaft L. Upon the
shaft L is rigidly mounted the conical pulley G which is connected by the belt H
with the conical pulley G rigidly mounted on the shaft 1. The shafts F, L and I
are provided with suitable bearings in the frame A. The shaft carries a
pulley N to which power is applied. In front of the face plates CC, is a slide
bed M adapted to move longitudinally along the dove-tail m, which forms a part
of the frame A. The slide-bed M is moved along the dove-tail m by a mechanism
similar to a feed in an ordinary lathe, which consists of a threaded shaft K which
engages with the lugs in the underside of the slide-bed and is provided with
hearings in the frame A. The shaft K is rotated by the following device. Upou
one extremity of the shaft F is rigidly mounted the beveled gear f, which is in
mesh with the beveled gear upon one extremity of the shaft J. The shaft J is
provided with bearings j and upon rigid parts extending from the frame A.
Upon the other extremity of the shaft J is a worm a, which engages with the worm
gear al upon the shaft K. Upon the slide bed M is a tool carrier frame O, which
is free to slide transversely along the dove-tails o and o'. Motion along the dove-
tails o and o' may be imparted to the tool carrier frame O, by means of a lever 1
attached to a shaft 2, which is connected with both ends of the tool carrier frame
Prics 8d7

page_text: by a link and lever connection. Between the standards R, R and R' R', which
form a part of the tool carrier frame O, are secured the tool carriers T and T', free
to tip on the bearings t, t and tt", in the standards R, R, and R', R. Through
the bearings runs a shaft u to which is attached a friction cone 4 which works
against a similar friction cone 5 upon the shaft 6, adapted to rotate in suitable
bearings in the tool carrier T. Outside of the tool carrier T, a shaft u carries a
pulley W to which power is applied. Upon the upper end of the shaft 6 is a
friction cone 7 working against a similar friction cone 8 upon the spindle V. The
spindles V and V₁are respectively provided with a device for adjusting therein a
cutting tool and tracer. The heads of the tool carriers T and Tare capable of
adjustment in a horizontal plane, and may be set so that the spindles are inclined
to the faces of the face-plates, and the cutting tool brought obliquely in contact
with the work (see Figure 6).
It will be noticed that the axis of the shaft u is coincident with the axis of the
tool carrier T, and that the axis of the shaft 6 is coincident with the axis of
adjustment of the head of the tool carrier T as above described. The head may
be by this arrangement set in any desired position, bringing the cutting tools
against the work at any desired angle, and the tool carrier is free to tip forward
or back without interfering with the operation of the friction cones. To the
standards R, R and R', R', are attached the arcs 30, 30, and 31, 31, adjustable by
means of lugs passing through the standards R, R, and R', R', which bear against
the tool carriers T and T just below the tool carrier heads, bracing the tool
carriers laterally, and preventing side motion thereof when the machine is in
operation. Each pair of standards R, R, and R', R', is connected by a plate 34 34.
Running through a nut in each of the plates 34 and 34 is a bolt 33, 33, adapted to
strike against a shoulder 35, 35, upon each of the tool carriers T and T, thus
preventing the tool and tracer from striking against the face plates when, in the
operation of the machine, they happen to run off the pattern or material.
A spring 32, 32 (only one of which is shown in drawings see Figure 5) is also
secured to each of the plates 34, 34 which is adapted to bear against the tool
carriers T and T₁ before the shoulders 35, 35 come in contact with the bolt 33, 33
thus preventing a shock to the machine when such contact occurs. A tilting
motion is given to the tool carriers T and T by the following device:-supported
by the standards X X which form a part of the tool carrier frame O, is a rod Y, free
to rotate in bearings in said standards. The springs s and s are wound around the
rod and connected therewith and with the standards X X the tendency of the
springs a and being to rotate the rod Y in the direction of the face plates C C.
The rod is connected with the tool carriers T and T' by the connecting
levers XX and X" X" and the effort exerted by the springs and s¹ is thus
exerted upon the upper portion of the tool carriers T and T above the tipping
axis, and acts to keep the tracer and cutting tools in contact with the work. The
belt H runs through a fork n which is attached to a rack 15, supported by the
lugs 16 and 17 from a rod 18 which forms a part of the frame A and is free to
slide thereon. Working in the rack 15 is a pinion 19 attached to a shaft 20,
provided with suitable bearings upon the frame A and the opposite extremity of
which is attached to a pinion 21 working in a rack 22 rigidly secured to a rod 23
which is mounted upon the slide bed M. The face plates CC carry on their
respective faces a series of attaching devices bbb etc., arranged in groups
eccentrically placed upon the respective faces of the face plates, whereby the
objects to be reproduced and the materials to be carved are attached eccentrically
to the faces of the face plates, each group having a corresponding group similarly
placed upon each of the faces of the other face plates, so that the objects and the
inaterial secured thereby will be held in corresponding positions. This particular
arrangement of the attaching devices is preferred because the capacity of the
machine and the accuracy of the reproduction are thereby greatly increased. To
the back of the respective face plates C C are secured the flanges 40 about which
run the bands 41 which are secured to some fixed part of the apparatus.

page_text: The arrangement of the flanges 40 is such that as the face plates C are rotated,
friction is created between the same; the force necessary to overcome which will
prevent the sudden increase in the angular velocity of the face plates, which
would otherwise occur when the resistance caused by the operation of the tracer
and cutting tool is suddenly removed, as when the tracer and cutter run off the
pattern and material. The operation of the invention is as follows-power
being applied to the pulley N rotary motion is communicated to the conical
pulley G, thence by the belt Ff to the conical pulley G thence by the pulley P
and a connecting belt to the pulley P on the worin shaft F, thence by means of the
worms E E and the worm gears D D' to the face plates CC and at the same time
by the extension of the shaft F and a connecting shaft J and a connecting system
of gearing, rotary motion is imparted to the threaded shaft K and the slide bed M
fed along the dovetail m, carrying the tool carrier frame O, thereby moving the
tracer and cutting tools along the face plates, and carrying the rack 22 over the
pinion 21, thereby producing a rotation of the shaft 20, an attached pinion 19
sliding the rack 15 over the shaft. 18 and by means of the fork n pushing the belt H
along the conical pulleys G and C, thus increasing or diminishing the angular
velocity of the face plates.
In the machine shown in the drawings, the feed is from the outside to the
centre of the face plates and the belt H, is moved along the conical pulleys G G
so as to increase the angular velocity of the face plates. The feed censes when
the tracer and cutting tool reach the centre of their respective face plates.
Tracer and cutter are then raised from the work by the operator, and a return
motion given thereto by reversing the machine, or by a device for quick return
similar to that used in common forms of lathe, but which is not shown in the
drawings, as it forms no part of this invention. The rate at which such increase or
decrease occurs is dependent upon the inclination of the conical pulleys G and G¹
Power is also applied, to the pulley W by means of a belt from any convenient
source imparting a rotary motion to the shaft u, which is communicated by means
of the friction cones 4, 5 to the shaft 6 and by means of the friction cones 7 8. to the
spindle V. As herein before stated, the heads of the tool carriers T and T being
adjustable, the spindle V may be inclined to the faces of the face plates C C and
in this way the rotating cutting tool is brought obliquely in contact with the
material to be carved, so that the cut is made substantially by the side of the tool,
thus enabling a finer and more delicate impression to be made upon the material.
The objects to be reproduced are secured to one of the face-plates C C while the
materials to be carved are secured in corresponding positions upon the other face
plates. As the face plates C C are rotated, the tracer being carried over the
surface of the pattern against which it is held as hereinbefore described, by the
action of the springs sa tipping motion is imparted to the tool carrier T, which,
by means of the levers XX", imparts a rotary motion to the rod Y, which, by
means of the levers X and X" produces a coincident motion of the tool carrier T
and the cutting tool, and the cutting tools following the inward or outward motion
of the tracer and being carried across the material by the rotation of the face
plate, reproduces the object over which the tracer is carried and the material to be
carved.
.
In the operation of this invention, the rotation of the face plates is in tlie
direction of the feed, that is to say, if the feed is from right to left, the rotation of
the face plates is from right to left.
It is evident that with this arrangement, if the circle formed by the rotation of a
face plate be divided vertically into semi-circles that a projection upon the face of
the face plate will when found in its revolution within the semi-circle toward the
point where the feed commences, have a tendency to lift up on the tracer and cutting
tool when brought in contact therewith; but at the same projection when found in
ts revolution in the opposite semi-circle will have a tendency to bear down and depress
the tracer and cutter, and hence cramp or brake the machine. It will further be
noted, that as the face plates C C are rotated, a certain time must be given the

page_text: tracer and cutter to ride out of depressions, and over elevations in the pattern; and
that during this time, there is a tendency to move the tracer and tool in the
direction of the revolution. It is moreover evident, that if the tracer and tool is so
moved beyond a certain point, the pattern or material will begin to exert a down-
ward pressure, and the machine will be cramped and injured. It is further evident
that such is particularly liable to be the result, when in the reproduction of a large
object, marked depressions on elevation occur near the centre when the tracer and
cutter are working on a small circle. By attaching the work and the pattern
eccentrically to the plates by means of the eccentrically placed groups of attaching
devices hereinbefore described, this difficulty is removed, and the machine made
practical for any kind of work.
It is evident that in carving machines of this class a tool carrier with a long
tipping radius, by allowing the motion of the tools toward or away from the face
plates to occur practically in the plane perpendicular thereto, if quickness of action
can be secured and sagging of parts prevented, will greatly increase the accuracy
of the reproduction of objects by the machine; especially, in the case of objects of
large size with marked elevations and depressions, as it prevents the machine from
jumping depressions, and enables it to follow accurately down the sides of the
elevations. By connecting the levers X", X", with each of the tool carriers
above its tipping axis, a quick motion is secured, for any length of tipping axis, and
by the arrangement of the levers X and X and X, X", and the rod Y, the
sagging of parts is prevented for it is evident that the slightest motion toward
or away from the face plates of either of the tool carriers will produce a rotation of
the rod Y, and a corresponding motion toward or away from the face plates of all
other tool carriers. As shown in Figure 4 the levers X, X", are adjustable in the
slots 50, 50 and 51 51 by means of set screws 52 52 and 53 53. By means of this
adjustment the extent of the tipping motion given to the tool carriers by à given
rotation of the rod may be varied. By a different adjustment of the respective
levers XX" the cutting tool may be made to cut an object the depressions and
clevations in which are more marked than on the pattern, or the opposite result may
be produced.
The minor devices shown in the drawings and which form a part of the invention
have already been sufficiently described.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. The combination of a series of rotating face plates adapted to support the
objects to be reproduced and the material to be carved, and a tracer and rotating
cutting tools adapted to be inclined to the face plates so that the cut is made by the
side of the tool substantially as set forth.
II. A series of rotating face plates respectively provided with a series of attaching
devices arranged in groups eccentrically placed thereon, and adapted to secure
eccentrically and in corresponding positions on the respective face plates the objects
to be reproduced and the material to be carved. All substantially as set forth
and for the purposes specified.
III. The combination of a series of rotating face plates, a series of tool
carriers adapted to receive a tipping motion, and carrying respectively a tracer
and rotating cutting tools, and a device for transmitting rotary motion along the
tipping axis of the tool carriers, and thence by connecting mechanism to the
cutting tools. All substantially as set forth and for the purposes specified.
IV. The combination of a series of rotating face plates, a series of tool
carriers adapted to receive a tipping motion, and provided with tool carrier heads
adjustable about a vertical axis and carrying respectively a tracer and rotating
cutting tools, and a device for communicating rotary motion to said cutting tools,
along the tipping axis of the tool carriers and the axes of adjustment of the
tool carrier heads. All substantially as set forth and for the purposes specified.

page_text: V. A device for imparting rotary motion to the cutting tools, consisting of a
shaft, to which power is applied, the axis of which is coincident with the tipping
axis of the tool carrier, a shaft provided with suitable bearings in the tool
carrier, the axis of which is coincident with the axis about which the tool
carrier head is adjustable, and friction cones connecting said shafts with cach
other and with a spindle carrying the cutting tools. All substantially as set
forth and for the purposes specified.
VI. The combination of a series of rotating face plates, a series of tool
carriers adapted to carry a tracer and rotating cutting tools, a mechanism for
imparting a tipping motion to said tool carriers in the direction of the face
plates, connected with each tool carrier at a point above its tripping axis. All
substantially as set forth and for the purposes specified.
VII. The combination of a series of rotating face plates, a tool carrier frame
upon which are mounted a series of tool carriers adapted to receive a tipping motion,
and carrying respectively a tracer and rotating cutting tools a revoluble rod mounted
in bearings in said tool carrier frame, a spring acting to rotate said rod in the
direction of said face plates, and levers connecting said rod with each of said tool
carriers at a point above its tipping axis. All substantially as set forth and for the
purposes specified.
VIII. A device for rendering the tipping motion of the tool carriers coincident,
consisting of a revoluble rod mounted in suitable bearings, and connected by levers
with each of the tool carriers at a point above its tipping axis. All substantially
as set forth and for the purposes specified.
IX. A device for preventing lateral vibration of the tool carriers, consisting of
uprights secured to the tool carrier frame, provided with parts adapted to bear
against each side of the carrier and between which the tool carrier slides when a
tipping motion is imparted thereto. All substantially as set forth and for the
purposes specified.
X. A device for preventing the tracer and cutting tools from coming in contact
with the face plates, consisting of a device supported by uprights between the tool
carriers and face plates, and adapted to come in contact with the tool carrier before
the tracer or cutting tool comes in contact with the face plates. All substantially
as set forth and for the purposes specified.
XI. The combination of the following instrumentalities, to wit; a series of
rotating face plates, a series of tool carriers carrying respectively a tracer and
rotating cutting tools, a device for feeding the same across the faces of the face
plates, a device for increasing the angular velocity of the face plates as the same
are fed in toward the centre, a device for communicating a rotary motion along the
tipping axis of the tool carrier by connecting mechanism to the cutting tools. All
substantially as set forth and for the purposes specified.
XII. The combination of the following instrumentalities to wit; a series of
rotating face plates, a series of tool carriers adapted to receive a tipping motion and
carrying respectively a tracer and rotating cutting tools, a device for feeding the
same across the faces of the face plates, a device for increasing the angular velocity
of the face plates as the same are fed in toward the centre, a mechanism for
imparting a tipping motion to the tool carriers, connected with each above its
tipping axis. All substantially as set forth and for the purposes specified.
XIII. The combination of the following instrumentalities to wit; a series of
rotating face plates a series of tool carriers adapted to receive a tipping motion, a
device for communicating rotary motion along the tipping axis of the tool carriers
by connecting mechanism to the cutting tools, a device for imparting a tipping
motion to the tool carriers connected with each at the point above its tipping axis.
All substantially as set forth and for the purposes specified.
XIV. A device for imparting rotary motion to the cutting tools, consisting of a
rotating shaft, the axis of which is coincident with the tipping axis of the tool
carrier, a connecting shaft mounted in bearings in the tool carrier and communicating

page_text: the rotary motion of said rotating shaft, by means of connecting friction cones,
to the cutting tools. All substantially as set forth and for the purposes specified.
XV. The combination of the following instrumentalities, to wit: a series of
rotating face plates, a series of tool carriers adapted to receive a tipping motion,
and carrying respectively a tracer and rotating cutting tools, a device for feeding
the same across the faces of the face plates a device for increasing the angular
velocity of the face plates as the same are fed in toward the centre, a device for
communicating rotary motion along the tipping axis of the tool carrier by connecting
mechanism to the cutting tools, mechanism for imparting a tipping motion to the
tool carriers connected with each above its tipping axis, a device for preventing a
sudden increase in the angular velocity of the face plates, a device for preventing
the tracer and cutting tools from coming in contact with the face plates. All
substantially as set forth and for the purposes specified.
XVI. A device for preventing a sudden increase in the angular velocity of the
face plates, consisting of the flanges 40, 40, connected with the respective face
plates, and turning therewith in the stationary band 41, 41, secured to some
permanent part of the apparatus. All substantially as set forth and for the
purposes specified.
XVII. A. device for regulating the action of the cutting tools, consisting of a
revoluble rod mounted in bearings in the tool carrier frame, and connected with each
of the tool carriers above its tipping axis by adjustable connecting levers. All
substantially as set forth and for the purposes specified.
XVIII. A device for varying the angular velocity of the face plates, consisting
of the conical pulley G and G¹ and the belt H connecting the mechanism for rotating
the face plates with the shaft to which power is applied, and a device operated by
the feed acting to move the belt H along the pulleys G and G. All substantially
.as set forth and for the purposes specified.
Dated this 15th day of January 1892.
ALFRED J. BOULT,
Chartered Patent Agent.