IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRESSING AND SHAPING STONE
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRESSING
AND SHAPING STONE" to be as follows:-
This invention has for its object to provide an improved machine adapted to
rapidly and effectively dress stone surfaces of various forms and to forin circular
orifices, moulded external edges, shallow surface depressions surrounded by raised
surfaces, and other configurations on marble or other kinds of stone.
The said invention comprises the improved mechanism hereinafter described.
According to the said invention the fixed supporting frame or base of the machine
is provided with horizontal longitudinal tracks or Hanges which support rollers'
journalled in bearings in a primary supporting carriage, the said carriage being
adapted by the rollers and tracks to move back and forth longitudinally of the
frame.
In the primary carriage is journalled a vertical arbor the lower end of which is
supported by a step or offset attached to said primary carriage.
The arbor serves as a pivot for a rotary support on which the secondary or
work-supporting carriage rests. Said support is composed of a gear-wheel whose
teeth mesh with a worm on a shaft hereinafter described, and a casting rigidly
attached to the gear wheel, and having two tracks, two guides, for the secondary
carriage, and flat bearing surfaces resting on rollers journalled in lateral extensions
of the frame, the said rollers supporting the rotary support and secondary carriage,
and enabling them to rotate easily. The said gear-wheel is adapted to be rotated
by the worm independently of the primary carriage and of the arbor.
secondary carriage has rollers resting on the tracks of the rotary support, whereby
the secondary carriage is adapted to reciprocate horizontally on said support, in a
direction governed by the position of the support, which may be adjusted so as to
cause its tracks to stand at right angles with the tracks of the fixed base or frame,.
or at any other desired angle.
The

page_text: To the lower ends of the arbor is attached a worm gear wheel, adapted to engage
with a movable worm, and to the upper end of said arbor is attached a pinion
meshing with a rack affixed to the under side of the secondary carriage.
Means are provided, as horeinafter described, for moving the primary carriage in
either. direction on the tracks, and for rotating the arbor in either direction, and
thereby, through the pinion and rack, moving the secondary carriage in either
direction on the tracks of the rotary support. Means are also provided for rotating
the support and the secondary carriage in either direction. The secondary carriago
is therefore capable of moving with the primary carriage in a rectilinear direction
longitudinally of the frame or base, or independently of the primary carriage at any
desired angle with said frame or base, and is also capable of rotating. A great
variety of movements can thus be given to the work which is secured to the upper
surface of the secondary carriage: Said carriage being provided with inverted
T-shaped slots like those in the bed of a metal planer, to receive adjustable clamping
bolts or devices.
The means employed for moving the primary carriage are a screw-shaft jour-
nalled in bearings in the frame, a half nut supported by the primary carriage and
adapted to slide thereon toward, and from, the screw. shaft so as to engage the
primary carriage with, or disconnect it from said shaft, and reversing mechanism
whereby the screw-shaft may be rotated in either direction, so as to move the
primary carriage in either direction. Said reversing mechanism is composed of a
shaft driven by a suitable motor and having a gear wheel, a second gear wheel
affixed to a screw shaft, a yoke or lever journalled on the shaft and carrying two
intermediate gear wheels which are so arranged that they can be alternately
engaged with the second gear wheel of the screw shaft by tilting the yoke, and a
rock-shaft journalled in bearings on the side of the base and having a toothed
Beginent engaging with a toothed segment on the end of the yoke. The rock-shaft
is adapted to hold the yoke so as to connect the wheel of the screw-shaft with the
wheel of the driving shaft through both of the intermediate wheels, or to hold the
yoke so as to connect the screw shaft with its motor through the intermediate
wheel only, the other intermediate wheel being idle. The rotation of the screw
shaft can therefore be reversed by a movement of the rock shaft, which is effected
by means of a crank on the rock shaft, a lever pivotted to the frame, and a rod
connecting the crank to the shorter arm of the fever. The longer arm of the lever
is provided with a handle which the operator grasps, for the purpose of operating
the rock-shaft, said handle being adapted to act as a spring-bolt or detent engaging
with holes in a plate affixed to the frame, the end holes respectively holding the
lever by its handle. When the handle is in the middle hole the yoko is held so
that neither of the intermediate gear wheels is engaged with the wheel of the
screw shaft. It is obvious, however, that the rock shaft may be operated by other
means, for example, by the crank alone, said crank being provided with a suitable
handle adapted to be grasped by the operator.
The half nut that engages the primary carriage with the screw shaft, is provided
with an arm, to the outer end of which is pivotted a lever which is pivotted to a
bracket on the primary carriage and is formed at its upper end as a rack segment
adapted to engage with teeth in a rack bar or plate which is adapted to slide on
the under side of the primary carriage, and is held in contact therewith by a
headed bolt passing through a slot in the said rack bar or plate. The outer
portion of the said plate is formed as a rack, the teeth of which mesh with a pinion
on a shaft which is journalled in the primary carriage. By rotating the said shaft
in one direction or the other the half nut will be moved toward or from the screw
shaft by the pinion, rack-plate, and lever, thus engaging the primary carriage with,
or disconnecting it from, the screw-shaft. The pinion shaft is turned by an
operating crank which is provided with a spring handle or bolt adapted to engage
with either one of a series of boles formed in a plate attached to the primary
carriage, said holes and bolt securing the shaft in different positions, and preventing
accidental movement of the nut.

page_text: The operator is thus enabled to cause the primary carriage to move along the
tracks or to remain at rest, without stopping the screw shaft, and when the primary
carriage is engaged with the screw shaft the direction of its movement may be
reversed at any moment by reversing the rotation of said shaft.
To prevent accidental movement of the primary carriage on its tracks when the
half nut is disengaged from the screw shaft I provide a clamp consisting of a short
two-armed lever pivotted to the primary carriage. One arm of this-clamp bears
against a flange on the primary carriage projecting under one of the tracks of the
frame. The other arm of the clamp bears against a cum on the pinion shaft said
cam being so formed that when the shaft is in position to hold the half nut away
from the screw shaft, the cam will press against the clamp so as to press it against
the said flange and thus cause the latter to bind against the track with such force
that the primary carriage cannot be easily moved on its tracks. When the pinion
shaft is in position to engage the half nut with the screw shaft, the cam releases
the clamp so that it does not press against the flange.
"
The arbor carrying the pinion that engages the rack of the secondary carriage,
is rotated to move said carriage on the tracks by means of a laterally movable
worm which is journalled in a supplementary frame, said frame being pivotted to
the primary carriage, and connected by a link with the half nut. This connection
causes. the laterally movable worm to be moved toward and from the worm wheel
on the arbor by the same mechanism that moves the half nut, the arrangement
being such that the worm is brought into engagement with the wheel when the
half nut is removed from the screw-shaft, and vice versa.
The arbor on which the laterally-movable worn is formed has a gear-wheel
engaging with a gear wheel affixed to the screw shaft. The worm is rotated by this
connection with the screw-shaft, and when engaged with the worm wheel, rotates
the latter with the arbor, causing the pinion of said arbor to act on the rack of
the secondary carriage and move said carriage on the tracks in a direction corre-
sponding to the direction of rotation of the screw shaft.
The arbor is locked and prevented from rotating when the half nut is engaged
with the screw shaft, by a brake enclosing a rigid flange attached to the worm
wheel, and a device operated by the supplementary frame, when said frame is
moved to separate the laterally movable worm from the wheel whereby the brake
is caused to lock the wheel and arbor so that the secondary carriage cannot be
moved by the pinion of said arbor.
The said brake is a divided band of metal pivotted to the bottom of the primary
carriage and having an outwardly-projecting arm. A dog or lever is pivotted to
the primary carriage, and adapted to bear against the arm at its outer end or nose.
The dog is provided with an arm which is rigidly attached to the dog and is
provided in its outer end with a slot which receives a stud on the supplementary
frame, in which the worm is journalled. Said slot is somewhat inclined or diagonal
to the movement of the stud when the said frame is moving away from the screw
shaft, hence said movement causes the arm and dog to turn slightly on the pivot
and thus press the nose of the dog against the arm of the brake. The brake is
thus caused to lock the arbor tightly so that it cannot rotate. When the supple-
mentary frame is moved to engage the worm with the wheel, the brake is caused
to release the arbor. It must be borne in mind that the arbor is locked by the
described devices only when the supplementary frame is moved to its farthest
extent away from the screw shaft, and the half nut is engaged with the screw
shaft. When the said fraine and half nut are in their intermediate positions,
leaving the carriages disconnected but not locked, the brake is in a loose
condition.
The worm engaging with the worm wheel of the rotary support has a pinion at
one end of its arbor, said pinion being connected by an intermediate pinion with a
gear-wheel on one end of an arbor which is journalled in bearings or hangers
attached to the primary carriage. The other end of the arbor has a pinion which
engages with a gear wheel affixed to a longitudinally movable arbor which is

page_text: journalled in a hanger secured to the primary carriage. The movable arbor also
has affixed to it a bevel gear wheel which is adapted-when the arbor is moved
toward the screw-shaft-to engage with a second bevel gear wheel on said shaft.
The latter bevel gear-wheel is engaged with the screw-shaft by a key or feather
adapted to slide in a longitudinal groove in said shaft, so that the wheel moves
along the screw-shaft with the primary carriago when the latter is engaged with
the screw-shaft. When the said bevel gear wheels are engaged with each other,
motion is communicated from the screw-shaft through the arbors and intermediate
pinion to the worm, causing the latter to rotate the support in a direction corre-
sponding to the direction of rotation of the screw-shaft. The longitudinally
movable arbor is provided with peripheral rack teeth with which engages a pinion
on a shaft journalled in a hanger attached to the primary carriage, said shaft having
a crank at the front end of the carriage by which the operator can turn the shaft
and thus cause the pinion to move the arbor lengthwise to engage its bevel gear-
wheel with, or disconnect it from, the second bevel gear wheel of the screw-shaft.
The rack teeth extend entirely around the arbor, hence they are always in engage-
ment with the pinion.
The described mechanism enables any desired movement or series of movements
to be imparted to the secondary carriage, and adapts the machine particularly for
dressing upper surfaces of stone slabs, and producing such diversities of surface as
are found in tops of wash-stands or lavatories having a portion of the upper
surface depressed to form a raised margin, and also having a circular orifice in the
centre to permit access to a fixed washbowl, set under the slab. The machine is
provided with an overhanging cutter of any suitablo form secured to a rotary arbor
which is journalled in a sleevo having its external surface threaded and engaged
with a nut which is interposed between two parts of a fixed tubular holder, and
supported by the lower part of said holder.
The arbor is connected to the sleeve in such a manner that it can rotate freely
and will move longitudinally with the sleeve when the latter is raised or lowered
by rotating the nut. The said connection is effected in the present instance by
means of a ring which embraces an external flange on the lower end of the sleeve
and is free to rotate thereon, the cutter being rigidly attached to said ring. The
cutter is also secured rigidly to the arbor, so as to rotate therewith. It will be
seen that by rotating the nut the arbor and its cutter can be raised and lowered
to any desired extent.
The arbor is provided with a bevel gear wheel which is engaged with the arbor
by means of a feather in the wheel and a groove in the arbor, so that the arbor can
move endwise independently.
An arbor extends diagonally upward through a hollow arm affixed to the frame,
the said hollow arm supporting the tubular holder. The diagonal arbor has two
bevel gear wheels engaging respectively with the bevel gear wheel on the cutter
arbor, and with a bevel gear wheel on the main driving shaft, which is journalled
in bearings in the main frame and is in line with the screw shaft but rotates
independently thereof. The main driving shaft has a gear-wheel which gives
motion through an intermediato wheel to an intermediato shaft whereby the
Bcrew-shaft is rotated.
The form and construction of the cutter employed will depend on the nature o
the work. I prefer to employ a cutter consisting of a holder having one or more
cutting bits detachably secured thereto and having their lower ends formed to cu
the stone.
The bolder may be in the form of a hollow cylindrical shell having at its uppe
end an externally threaded neck adapted to be screwed into the ring hereinbefor
described, and, provided at its inner surface with a series of vertical slots which ar
radial in cross section, and with a series of annular or transverse slots intersecting
other slots The bits are bent at right angles at their upper ends, and the body o
each bit enters one of the longitudinal slots, and the bent end enters one of th
anuular slots, each bit being supported by the bearing of its bent end on th

page_text: bottom of the annular slot in which it resta A cylindrical plug is inserted in
the holder and fills the central space thus holding the bits in the slots Said plug
has a threaded neck which is scrowed through a threaded socket in the holder and
into a similar socket in the lower end of the cutter arbor thus securing the cutter
to the arbor. It will be seen that as many bits may be used as there are slots,
but in practice two will be sufficient. As the bits become worn they can be
adjusted by moving their bent ends from one annular slot to the one below, 80
that long bits can be provided and used until worn to a small fraction of their
original length. The cutting edges of the cutters are shaped according to the
purposes for which they are intended.
The tool holder may be composed of two parts clamped together by bolts. The
proximate surfaces of said parts are flat and are provided with vertical slots
receiving the shanks of the bits, and with transverse slots receiving the bent ends
of the bits, the latter being adapted to be moved froin one slot to another as in
the form above described. The two bits.thus arranged aro adapted to cut in a
stone slab, an annular groove, such as is ordinarily formed around the portion of
the slab through which a water pipe passes to supply water through a cock to
tho bowl. The holder is provided with a central socket adapted to receive a drill
which will form an orifice for the water pipe exactly in the centre of the circular
space surrounded by the groove so that the groove is necessarily concentric with
the orifice and the pipe fixture when inserted will be concentric with the groove.
From the foregoing description it will be obvious that the machine is adapted to
perform several kinds of work and can be quickly and easily changed from one
kind to another. In forming a recessed or sunken surface in a slab, the secondary
carriage is alternately moved with the primary carriage and independently thereof,
so as to cause the stone to move in a rectangular path under the cutter, the length
of each movement being governed by the operator until the entire portion to bo
reduced has been presented to the cutter. The rotary support may be adjusted so
that the alternate movements of the secondary carriago with the primary carriage
and independently thereof will bo in a rhomboidal instead of a rectangular path.
When the top surface of a slab is being dressed, the slab lies directly on the
secondary carringo, and is secured by means of four clamps.
The base of each of these clamps is composed of a slotted plate adapted to bear
on the secondary carriage, and has bolts passing through a slot and having heads
which fit the T-shaped slots of the carriage. To the slotted plate is pivottod a jaw
adapted to fit the corner of a slab of stone, and a clamp adapted to bear on tho
upper surface of the stone. A screw presses the clamp upon the stone. It will bo
understood that a stone may be securely held by four of these clamps, and their
construction is such that they can be adjusted in the slots to accomodate any size
of slab.
In forming a circular orifice the slab is raised above the top surface of the
secondary carriage and the cutter is provided with bits of suitable form. The
initial orifico having been formed in the slab by sawing or otherwise, the secondary
carriage is adjusted until the cutter has entered the margin of the sawed orifice to
the required depth. The primary and secondary carriages are then locked so that
they cannot move endwise, special locking devices being employed for each carriage
independent of the locking devices before described, the special locking device for
the secondary carriage being a pin passed through the edge of the carriage into
a guide while the special locking devico for the primary carriage is a screw passing
through the primary carriage and bearing on the frame. The secondary carriage is
then rotated by the support the cutter being thus caused to form a moulded circular
margin around the orifice, the size of said orifice being increased to any desired
extent by the adjustment of the secondary carriage The initial orifice is usually
sawed in the slab to a given size.
To facilitate the proper placing of the stone on the secondary carriage I provido
a disc having at its centro a stud adapted to enter an orifice formed in the centre of

page_text: the secondary carriage. The diameter of the disc is such that it will enter and fit
somewhat closely the sawed orifice in the slab and thus form an eccentric guide in
placing the slab, the disc being first placed on the carriage and removed after the
slab has been adjusted to it.
Any desired form of slab may be moulded at its edge by employing a guide or
pattern which is secured to the secondary carriage and is provided with a groove
of the form to be imparted to the edge of the slab. An arm of the frame is
provided with a bracket to which is secured an arm projecting under, and entering,
the groove of the pattern The support is rotated and the primary and secondary
carriages are detached from their motors and left free to move loosely on their
respective carriages. The edge of the slab is thus presented to the cutter in such
a manner that the cutter will form a moulded edge on the slab parallel with tho
groove. The slab is first adjusted edgewise relatively to the cutter by the arm
which is adapted to slide endwise in the bracket, and is held in any position it may
assume by a screw which also adjusts it. The slab is held from moving laterally
by upwardly projecting pins or dowells on the pattern and is prevented from being
displaced vertically by a holding-down device composed of a swinging bracket
journalled in ears on the said arm and provided with anti-friction rollers which are
pressed downwardly on the slab by springs. This device permits the free lateral
movement of the slab, but prevents it from being lifted from the holding pins.
The cutter may he offset from the spindle and rotated by an intermediate planct
gear connecting it with the spindle so that it can operate in forming the margin of
an orifice near the end of a slab when the slab is of such length that it cannot
rotate under the arm.
To this end the cutter is journalled in a holder which is adapted to revolve
around a spindle and has a gear wheel which is connected with a gear wheel on the
said spindle by a planet gear which is supported by the holder. The holder is
rendered adjustable so as to vary the distance between the cutter and the spindlo
by means of a slot in the holder through which the sleeve of the spindle passes, and
a screw journelled in the said sleeve and passing through the holder. The holder
is provided with a worm wheel which engages with a worm journalled in a bracket
on the holder. The operator rotates the said worm by means of a hand-wheel
thereon, and thus causes the holder to rotate on the spindle, giving the cutter
a planetary motion, which enables it to mould the margin of an orifice in a non-
rotating slab.
I sometimes provide a rotary turret having a number of sockets adapted to
receive different cutters, each socket having a set-screw which hold the cutters not
in operative position. The turret is of dish-shape and is journalled on an arın
attached to the sleeve of a spindle. By rotating the turret either of its cutters may
be brought in position to be screwed into the spindle, the set-screw holding the
cutter thus brought in position being loosened before the cutter is engaged with the
spindle. The described form of the turret enables it to hold the cutter not in use,
in inclined positions above the surface on which the operating cutter acts.
To automatically vary the height of the cutter while it is operating, and thus
enable it to dress undulating surfaces I provide a slide having an undulating upper
edge fitted to slide in guides on an arm and provided with a rack with which
engages a pinion on a rotating shaft. A sleeve of the shaft is adapted to rise and
fall, and has a stud in which is a roller bearing on the undulating surface of the
slide. The slide is reciprocated by a rack and pinion, and its curved edge causes
the cutter to rise and fall and thus impart a corresponding curvature to a surface
on the carriage.
The cutter spindle may be mounted in a frame which is adapted to oscillate on
an intermediate shaft so as to oscillate the cutter and cause it to dress a concave
surface. The frame may be provided with a worm wheel with which a worm
engages. By rotating said worm the operator is enabled to give the spindle any
desired inclination. The cutter may thus be caused to form a dished or concave

page_text: circular surface by rotating the stone from time to time while it is being acted on
by the oscillating cutter.
I sometimes use a reciprocating rubbing tool operated by the rotation of the
spindle, the sleeve of the spindle being provided with a casing in which is
a reciprocating slide engaged with an eccentric pin on the end of the spindle and
reciprocated thereby The casing is journalled on a sleeve and is capable of being
partially rotated thereon, so that the direction of the movement of the rubbing tool
may be changed from time to time, thus enabling the tool to rub in a direction at
any desired angle to the direction in which it may have previously rubbed the same
surface.

page_text: COMPLETE SPECIFICATION.
I, WILLIAM ROBERT LAKE of the firm of Haseltine, Lake & Co Patent Agents,
Southampton Buildings in the County of Middlesox do hereby declare the nature
of my invention for "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRESSING
AND SHAPING STONE" and in what manner the s
same is to be performed, to be
particularly described and ascertained in and by the following statement:-
This invention has for its object to provide an improved machine adapted to
rapidly and effectively dress stone surfaces of various forms, and to form circular
orifices, moulded external edges, shallow surface depressions surrounded by raised
surfaces, and other configurations on marble or other kinds of stone.
My invention comprises the improved mechanism hereinafter described.
In the accompanying drawing
Figure 1 is a front elevation of the improved machine.
Figure 2 is a longitudinal vertical central section.
Figure 2 is a top view and a section on the line xx, Figure 2.
Figure 3 is a section on the line y y, Figure 2, looking toward the right.
Figures 4 and 5 are views of details.
Figure 6 is a section on the lino, Figure 2, looking toward the left.
Figure 7 is a section on the line y, y Figure 2, looking toward the left.
Figures 2b and 8 to 33 inclusive, are views of details.
Similar letters of referenco indicate corresponding parts in all the figures.
A indicates the fixed supporting frame or base of the machine, which is pro-
vided with horizontal longitudinal tracks or flanges B, B (see Figures 1, 2 and 6)
which support rollers C. C journalled in bearings in a primary supporting carriage D
said carriage being adapted by the rollers and tracks to move back and forth
longitudinally of the frame A.
In the primary carriage D is journalled a vertical arbor E, the lower end of
which is supported by a step or offset F, attached to said primary carriage see
Figure 2. The arbor E serves as a pivot for a rotary support G, on which the
secondary or work supporting carriage H rests. Said support is composed of a
gear-wheel 2, (whose teeth mesh with a worm I on the shaft J, hereinafter
described) and a casting 3, rigidly attached to the wheel 2 and having two
tracks 4, 4, two guides 5, 5 for the secondary carriage, and flat bearing-surfaces 6, 6,
resting on rollers K K journalled in lateral extensions L L of the carriage D, said
rollers supporting the rotary support and secondary carriage, and enabling them to
rotate easily. The wheel 2 is adapted to be rotated by the worm I independently
of the primary carriage D and of the arbor E. The secondary carriage has
rollers M M, resting on the tracks 4 4 of the rotary support, whereby the secondary
carriage is adapted to reciprocate horizontally on said support in a direction
governed by the position of the support, which may be adjusted so as to cause its
tracks 44 to stand at right angles with the tracks B B of the fixed base A, or at
any other desired angle

page_text: To the lower end of the arbor E is attached a worm-gear wheel N, adapted to
engage with a movable worm O, (seo Figures 2 and 6), and to the upper end of
said arbor is attached a pinion P, meshing with a rack Ŕ affixed to tho under sido
of the secondary carriage H.
Means are provided, as hereinafter described, for moving the primary carriage
in either direction on the tracks B B and for rotating the arbor E in either
direction, and thereby, through the pinion P and rack R, moving the secondary
carriage in either direction on the tracks 4 4 of the rotary support. Means aro
also provided for rotating the support G and the secondary carriage in either
direction. The secondary carriage is therefore capable of moving with the primary
carriage in a rectilinear direction longitudinally of the frame or base A, or inde-
pendently of the primary carriage at any desired angle with said frame or base,
and is also capablo of rotating. A great variety of movements can thus be given
to the work which is secured to the upper surface of the secondary carriage, said
carriage being provided with inverted-T-shaped slots, like those in the bed of a
metal-planing machine to receive adjustable clamping bolts or devices.
The means employed for moving the primary carriage are a screw-shaft S,
journalled in bearings in the frame A; a half-nut T, supported by the primary
carriage and adapted to slide thereon, toward and from the shaft S, so as to engage
the primary carriage with or dis-connect it from said shaft; and reversing
mechanism whereby the shaft S may be rotated in either direction, so as to move
the primary carriage in either direction.
Said reversing mechanism is composed of a shaft U, driven by a suitable motor
and having a gear-wheel V; a gear-wheel W affixed to the screw-shaft; a yoke or
lever a, journalled on the shaft U and carrying two intermediate gear-wheels b, c,
which are so arranged that they can be alternately engaged with the wheel W of
the screw-shaft by tilting the yoke a; and a rock-shaft d journalled in bearings on
the side of the base A, and having a toothed segment e engaging with a toothed
segment on the end of the yoke a (see Figure 9).
The rock-shaft d is adapted to hold the yoke a either in the position shown in
Figures 6, 7, and 9, so as to connect the wheel W of the screw-shaft with the
wheel V of the driving-shaft through both of the intermedinto wheels c, b'; or to
hold the yoke in the position shown in Figure 9º, so as to connect the screw-shaft
with its motor through the intermediate wheel b only, the other intermediate
wheel c being idle. The rotation of the screw-shaft can therefore be reversed by a
movement of the rock-shaft, which movement is effected by means of a crank g on
the rock-shaft d, a lever h pivotted at i to the frame A, and a rod j connecting the
crank g to the shorter arm h¹ of the lever h. The longer arm of the lever h is
provided with a handle k, which the operator grasps for the purpose of operating
the rock-shaft, said handle being adapted to act as a spring bolt or detent,
engaging with holes l, m, n in a plate o affixed to the frame A. Figure 1, the end
holes l, n, respectively, holding the lever h by its handle in the positions shown in
Figures 9 and 9°. When the handle is in the middle hole, the yoke a is held in
the position shown in Figure 9b, neither of the intermediate gear wheels b, c being
engaged with the wheel W of the screw-shaft. It is obvious, however, that the
rock-shaft may be operated by other means-for example, by the crank g alone,
said crank being provided with a suitable handle adapted to be grasped by the
operator.
The half-nut T that engages the primary carriage D with the screw-shaft, is
provided with an arm p, to the outer end of which is pivotted a lever q which is
also pivotted at 7 to a bracket on the primary carriage, and is formed at its upper
end as a rack-segment, adapted to engage with teeth in a rack bar or plate a
adapted to slide on the under side of the primary carriage, and held in contact
therewith by a headed bolt t passing through a slot in the plate s.
portion of the plate s is formed as a rack, the teeth of which mesh with a pinion u
on a shaft v journalled in the primary carriage D. It will be soon that by rotating
she shaft in one direction or the other the half-nut T will be moved toward
The outer

page_text: or from the screw-shaft by the pinion u, rack-plate 8, and lever q, thus engaging the
primary carriage with or disconnecting it from the screw-shaft. The shaft u is
turned by an operating-crank w, which is provided with a spring handle or bolt a¹,
adapted to engage with either one of a series of holes b', c', d' formed in a plate e¹,
.attached to the primary carriage D, said holes and bolt securing the shaft in
different positions, and preventing accidental movement of the nut.
The operator
is thus enabled to cause the primary carriage to move along the tracks B or
to remain at rest, without stopping the screw-shaft, and when the primary carriage
is engaged with the screw-shaft the direction of its movement may be reversed at
any moment by reversing the rotation of said shaft.
To prevent accidental movement of the primary carriage D on its tracks when
the half-nut T is disengaged from the screw-shaft, I provide a clamp f', consisting
of a short two-armed lever pivotted at g' to the primary carriage. (See Figures 6
and 8.) One arm of this clamp bears against a flange, h¹, on the primary
carriage D, projecting under one of the tracks or flanges B of the frame À. The
other arm of the clamp bears against a cam i', Figure 8, on the shaft v, said cam
being so formed that when the shaft is in position to hold the half-nut T away
from the screw-shaft, the cam will press against the clamp so as to press it against
the flange, and thus cause the latter to bind against the track or flange B with
such force that the primary carriage cannot be easily moved on its tracks. When
the shaft vis in position to engage the half-nut with the screw-shaft, the cam ¹
releases the clamp f¹ so that it does not press against the flange h¹¹¹.
The arbor E, having the pinion P that engages the rack R of the secondary
carriage, is rotated to move said carriage on the tracks 4, 4 by means of the
laterally-movable worm O, (see Figures 2 and 6), which is journalled in a frame j,
said frame being pivotted at k¹ to the primary carriage and connected by a link l¹
with the half-nut T (See Figures 2ª and 2b). This connection causes the worm O
to be moved toward and from the worm-wheel N on the arbor E by the same
mechanism that moves the half-nut T, the arrangement being such that the worm
is brought into engagement with the wheel N when the half-nut is removed from
the screw-shaft, and vice versa. When the handle a¹ is engaged with the hole d of
the plate e¹, the half-nut T is withdrawn from the screw-shaft, the clamp f' is
pressed against the flange, and the worm O is engaged with the wheel N; the
nut T and clamp f¹ being thus held so that the primary carriage is immovable, and
the worm O being held in position to operate the secondary carriage. When the
handle wis engaged with the hole b', the nut T is held in contact with the screw-
shaft, the worm O is held away from the wheel, and the clamp f' is prevented from
binding against the flange of the primary carriage. When the handle a¹ is in
the middle hole c', the half-nut T is held away from the screw-shaft and the worm O
is held away from the wheel N, both carriages being disconnected and free to be
moved on their tracks. The arbor on which the worm O is formed has a gear-
wheel m¹ meshing with a gear-wheel n¹ affixed to the screw-shaft S. The worm is
rotated by this connection with the screw-shaft, and, when engaged with the worm-
wheel N, rotates the latter with the arbor E, causing the pinion P of said arbor
to act on the rack R of the secondary carriage and move said carriage on the
tracks 4, 4 in a direction corresponding to the direction of rotation of the screw-
shaft. The arbor E is locked and prevented from rotating, when the half-nut T is
engaged with the screw-shaft, by 'a' brake o¹, (see Figures 2 and 2ª), enclosing a
flange p rigidly attached to the worm-wheel N, and a devico operated by the
frame, when said frame is moved to separate the worm O from the wheel N, |
whereby the brake is caused to lock the wheel N and arbor E, so that the secondary
carriage cannot be moved by the pinion P of said arbor. The brake o' is a divided
band of metal, pivotted at g¹ to the bottom of the primary carriage and having an
outwardly-projecting arm r¹.
8' represents a dog or lever pivotted at t¹ to the primary carriage, and adapted to

page_text: a slot v¹ which receives a stud on the frame in which the worm O is journalled.
Said slot is somewhat inclined or diagonal to the movement of the stud when the
frame is moving away from the screw-shaft; hence said movement causes the
arm and dogs to turn slightly on the pivot q, and thus press the nose of
the dog s against the arm r' of the brake. The brake is thus caused to lock the
arbor E tightly, so that it cannot rotate. When the frame is moved to engage
the worm O with the wheel N, the brake is caused to release the arbor E.
be borne in mind that the arbor E is locked by the described devices only when the
frame j is moved to its farthest extent away from the screw-shaft and the half-
nut T is engaged with the screw-shaft. When the frame 7 and half-nut are in
their intermediate positions, leaving the carriages disconnected but not locked, the
brake o' is in a loose condition.
It must
The worm I, engaging with the worm-wheel 2 of the rotary support G, has
a pinion w¹ at one end of its arbor (see Figure 3,) said pinion being connected by
an intermediate pinion a³ with a gear-wheel b² on one end of an arbor o, which is
journalled in bearings or hangers attached to the primary carriage. The other end
of the arbor c² has a pinion d³, which meshes with a gear-wheel e affixed to
a longitudinally-movable arbor f journalled in a hanger secured to the primary
carriage. The arbor fs also has affixed to it a bevel gear-wheel g³ adapted, when
the arbor is moved toward the screw-shaft, to engage with a bevel gear-wheel, h³,
on said shaft. The bevel gear-wheel h is engaged with the screw-shaft by a key
or feather adapted to slide in a longitudinal groove in said shaft, so that the wheel
moves along the screw-shaft with the primary carriage when the latter is engaged
with the screw-shaft. When the bevel-gear wheels g², h are engaged with each
other, motion is communicated from the screw-shaft through the arbors fs and cª
and intermediate pinion as to the worm I causing the latter to rotate the support G
in a direction corresponding to the direction of rotation of the screw-shaft. The
Jongitudinally movable arbor f³ is provided with peripheral rack-teeth, with
which engages a pinion j on a shaft journalled in a hanger attached to the
primary carriage (see Figure 4); said shaft having a crank at the front end of
the carriage, by which the operator can turn the shaft and thus cause the pinion j
to move the arbor f lengthwise, to engage its bevel-gear wheel g³ with, or
disconnect it from, the bevel-gear h³ of the screw-shaft. The rack-teeth extend
entirely around the arbor f'; hence they are always in engagement with the
pinion 7.
It will be observed that the described mechanism enables any desired movement
or series of movements to be imparted to the secondary carriage, and adapts the
machine particularly for dressing upper surfaces of stone slabs, and producing such
diversities of surface as are found in tops of wash stands or lavatories, having a
portion of the upper surface depressed to form a raised margin, and also having a
circular orifice in the centre, to permit access to a fixed wash-bowl set under the
alab.
The machine is provided with an over-hanging cutter 12, of any suitable form,
secured to a rotary arbor m³, which is journalled in a sleeve n³ having its external
surface threaded and engaged with a nut o interposed between two parts of a
fixed tubular holder p² and supported by the lower part of said holder. The arbor
is connected to the sleeve n³ in such manner that it can rotate freely and will
move longitudinally with the sleeve when the latter is raised or lowered by
rotating the nut o³. Said connection is effected in the present instance, by means
of a ring, which embraces an external flange on the lower end of the sleeve n³
and is free to rotate thereon, the cutter being rigidly attached to said ring. The
cutter is also secured rigidly to the arbor, so as to rotate therewith. It will be
seen that by rotating the nut of the arbor m² and its cutter can be raised and
lowered to any desired extent. The arbor m³ is provided with a bevel gear-
wheels, which is engaged with the arbor by means of a feather in the wheel and
a groove in the arbor, so that the arbor can move end wise independently.

page_text: t represents an arbor extending diagonally upward through a hollow arm u³,
affixed to the frame A, said arm supporting the tubular holder p³. The arbor t³ has
two bevel-gear wheels v², w³, meshing, respectively, with the bevel gear-wheel
on the cutter arbor m'and with a bevel gear wheel y on the main driving-shaft a³
journalled in bearings in the frame A, and is in line with the screw-shaft S, but
rotating independently thereof. The shaft a³ has a gear-wheel 6 which gives
motion, through an intermediato wheel o³, Figures 2 and 5, to the shaft U,
whereby the screw-shaft S is rotated.
The form and construction of the cutter employed will depend on the nature of
the work. I prefer to construct the cutter on the general plan shown in
Figures 6, 12, 12, 13, 14, 19, and 20, a holder d³ being employed, and one or more
cutting-bits e detachably secured to said holder and having their lower ends
formed to cut the stone.
The holder as (shown in Figures 12 and 12") is a hollow cylindrical shell, having
at its upper end an externally-threaded neck adapted to be screwed into the
ring, above described, and provided in its inner surface with a series of vertical
slots f³, which are radial in cross-section as shown in Figure 12a, and with a series
of annular or transverse slots g³ intersecting the slots f³. The bits e³ are bent at
right angles at their upper ends, as shown in Figures 13 and 14. The body of
each bit enters one of the longitudinal slots f³, and the bent end enters one of the
annular slots 93 (see Figure 12), each bit being supported by the bearing of its bent
end on the bottom of the annular slot in which it rests.
A cylindrical plug h³ is inserted in the holder and fills the central space, thus
holding the bits in the slots f³. Said plug has a threaded neck, which is screwed
through a threaded socket in the holder and into a similar socket in the lower
end of the cutter arbor m³, thus securing the cutter to the arbor. It will be seen
that as many bits may be used as there are slots f³; but in practice two will be
sufficient. As the bits become worn, they can be adjusted by moving their bent
ends from one annular slot g³ to the one below, so that long bits can be provided
and used until worn to a small fraction of their original length. When the cutter
is intended for forming flat surfaces on a slab, the cutting-edges of the bit should
have the form shown in Figures 6 and 13. When used for moulding the edge of a
slab or the margin of an orifico in the slab the bits will be formed to produce the
desired shape.
Figures 19 and 20 show a tool-holder composed of two parts i³ ³, clamped
together by bolts 3. The proximate surfaces of said parts are flat, and are
provided with vertical slots f³ receiving the shanks of the bits, and with transverse
slots g³ receiving the bent ends of the bits, the latter being adapted to be moved
from one slot g³ to another, as in the form above described. The two bits thus
arranged are adapted to cut in a stone slab an annular groove ³, Figure 33, such
as is ordinarily formed around the portion of the slab through which a water-pipe
passes to supply water through a cock to the bowl.
The holder is provided with a central socket adapted to receive a drill, which
will form an orifice for the water-pipe exactly in the centre of the circular space
surrounded by the groove ks, so that the groove is necessarily concentric with the
orifice, and the pipe-fixture, when inserted, will bo concentric with the groove.
From the foregoing description it will be obvious that the machine is adapted
to perform several kinds of work, and can be quickly and easily changed from one
kind to another.
In forming the recessed or sunken surface m³ in the slab, the secondary carriage
is alternately moved with the primary carriage and independently thereof, so as to
cause the stone to move in a rectangular path under the cutter, the length of each
movement being governed by the operator until the entire portion to be reduced
has been presented to the cutter. The rotary support may be adjusted so that the
alternate movements of the secondary carriage with the primary carriage and
independently thereof will be in a rhomboidal instead of a rectangular path,

page_text: When the top surface of a slab is being dressed, the slab lics directly on the
secondary carriage, and is secured by means of four clamps, formed as shown in
Figures 15 and 16. The base of each clamp is composed of a slotted plate a³,
adapted to bear on the secondary carriage, and having two bolts a, a passing
through the slot a' and having heads which fit the T-shaped slots a³ of the carriage.
To the plate a³ is pivotted a jaw c adapted to fit the corner of a slab of stone, and
a clamp d adapted to bear on the upper surface of the stone. A screw presses
the clamp d upon the stone. It will be seen that a stone may be securely held by
four of these clamps, and that their construction is such that they can be adjusted
in the slots as to any size of slab.
In forming the circular orifice n³ the slab is raised above the top surface of the
secondary carriage, and the cutter is provided with bits formed substantially as
shown in Figure 14. The initial orifice having been formed in the slab by sawing
or otherwise, the secondary carriage is adjusted until the cutter has entered the
margin of the sawed orifice to the required depth. The primary and secondary
carriages are then locked, so that they cannot move endwise, special locking devices
being employed for each carriage independent of the locking devices before
described, the special locking device for the secondary carriage being a pin 25, (seo
Figure 2), passed through the edge of the carriage into the guide 5; while the
special locking device for the primary carriage is a screw 87 (see Figure 1), passing
through the primary carriage and bearing on the base A. The secondary carriage
is then rotated by the support G, the cutter being thus caused to form a moulded
circular margin around the orifice, the size of said orifice being increased to any
desired extent by the adjustment of the secondary carriage. The initial orifice is
usually sawed in the slab to a given size.
To facilitate the proper placing of the stone on the secondary carriage, I provide
a disc de (Figures 10 and 11) having at its centre a stud d', adapted to enter an
orifice formed in the centre of the secondary carriage. The diameter of the disc
is such that it will enter and fit somewhat closely the sawed orifice in the slab, and
thus form a guide in placing the slab, the disc being first placed on the carriage,
and removed after the slab has been adjusted to it.
The edges of a slab may be moulded, as shown in Figure 17, and any desired
form of slab may be moulded at its edge by employing a guide or pattern o³, which
is secured to the secondary carriage and is provided with a groove p³ of the form
to be imparted to the edge of the slab. The arm u³ of the frame is provided with
a bracket q³ to which is secured an arm 7³ projecting under and entering the
groove of the pattern o³. The support G is rotated, and the primary and secondary
carriages are detached from their motors and left free to move loosely on their
respective carriages. The edge of the slab is thus presented to the cutter in such
manner that the cutter will form a moulded edge on the slab parallel with the
groove. The slab is first adjusted edgewise relatively to the cutter by the arm 7³
which is adapted to slide endwise in the bracket g³, and is held in any position it
may assume by a screw t³ which also adjusts it. The slab is held from moving
laterally by upwardly-projecting pins or dowels on the pattern o³, and is prevented
from being displaced vertically by a holding-down device composed of a swinging
bracket u journalled in ears on the arm u and provided with anti-friction
rollers, which are pressed downwardly on the slab by springs. This device permits
the free lateral movement of the slab, but prevents it from being lifted from the
holding-pins.
The cutter may be offset from the spindle m³, and rotated by an intermediate
planet-gear connecting it with the spindle, as shown in Figures 21 to 24, inclusive,
so that it can operate in forming the margin of an orifice near the end of a slab
when the slab is of such length that it cannot rotate under the arm u². To this
end the cutter is journalled in a holder a', which is adapted to revolve around the
spindle m² and has a gear-wheel b connected with a gear-wheel on the spindle
by a planet-gear d' supported by the holder at The holder a is rendered
• adjustable, so as to vary the distance between the cutter and the spindle m³, by

page_text: means of a slot et in the holder, through which slot the sleeve of the spindle passes,
and a screw f journalled in said sleeve and passing through the holder at (see
Figure 23). The holder a is provided with a worm-wheel w, which engages with
a worm w journailed in a bracket on the holder p³. The operator rotates said
worm by means of a band-wheel thereon, and thus causes the holder at to rotate
on the spindle m³ giving the cutter a planetary motion, which enables it to mould
the margin of an orifice in a non-rotating 'slab.
Figures 25 and 26 show a rotary turret 9, having a number of sockets
adapted to receive different cutters, each socket having a set-screw which hold
the cutters in an operative position. The turret is of dish shape, and is journalled
on an arm attached to the sleeve of the spindle m³. By rotating the turret
either of its cutters may be brought in position to be screwed into the spindle, the
set-screw holding the cutter thus brought in position being loosened before the
cutter is engaged with the spindle. The described form of the turret enables it to
hold the cutter not in use in inclined positions above the surface on which the
operating-cutter acts.
Figures 27 and 28 show means for automatically varying the height of the cutter
while it is operating, and thus enabling it to dress undulating surfaces. A slide k
having an undulating upper edge is fitted to slide in guides on the arm u², and is
provided with a rack with which engages a pinion m on a rotating shaft n
The sleeve of the spindle is adapted to rise and fall, and has a stud in which
is a roller p¹ bearing on the undulating surface of the slide . The slide is reci-
procated by the rack and pinion, and its curved edge causes the cutter to rise and
fall, and thus impart a corresponding curvature to a surface on the carriage.
Figures 29 and 30 show the cutter-spindle mounted in a frame f, which is
adapted to oscillate on an intermediate shaft ge so as to oscillate the cutter and
cause it to dress a concave surface. The frame may be provided with a worm
wheel h6, with which worin engages. By rotating said worm the operator is
enabled to give the spindle any desired inclination. The cutter may thus be caused
to form a dished or concave circular surface by rotating the stone from time to
time while it is being acted on by the oscillating cutter.
Figures 31 and 32 show a reciprocating rubbing-tool operated by the rotation of
the spindle, the sleeve of the spindle being provided with a casing g' in which is a
reciprocating slide engaged with an eccentric pin 8 on the end of the spindle
and reciprocated thereby. The casing q' is journalled on the sleeve, and is capable
of being partially rotated thereon so that the direction of the movement of the
rubbing-tool may be changed from time to time, thus enabling the tool to rub in a
direction at any desired angle to the direction in which it may have previously
rubbed the same surface. A high polish may thus be imparted, a suitable rubbing
or polishing tool being provided.
It will be seen that in this machine all the parts necessary to impart the various
movements to the bed or support are driven from a single source of power, thereby
distinguishing it from the various kinds of forming machines where the support or
holder is partly driven and partly adjusted by hand.
Having now particularly described and ascertained the naturo of my said
invention, and in what manner the same is to be performed I declare that what
I claim is
First. In a stone-dressing machine, the combination with a work-supporting
carriage, of travelling supports for the carriage, a main driving-shaft, and mechanism,
substantially as described connecting the supports and the carriage with the shaft,
the arrangement being such that the work-supporting carriage may be caused to
travel in any substantially horizontal direction, as set forth.
Second. In a stone-dressing machine, the combination with a work supporting
carriage, of a rotary and a reciprocating support for the carriage, and mechanism,
substantially as described, for connecting said supports and propelling the same
from a single shaft, as set forth.

page_text: Third. In a stone-dressing machine, the combination of a primary carriage
travelling on fixed tracks, a support rotating on a pivot or centre carried by said
primary carriage, a secondary work supporting carriage travelling on said rotary
support, and mechanism, substantially as described, for propelling said supports and
carriage from a single shaft.
Fourth. In a stone-dressing machine, the combination of the primary carriage
adapted to travel on fixed tracks B, having rollers bearing on said tracks, and
provided with lateral extensions or supports LL; the rotary support adapted to
rotate on a pivot supported by the primary carriage and to bear upon the support L;
and the secondary work-supporting carriage adapted to move endwise on tracks on
the rotary support, and mechanism for propelling the same from a single source of
power, as set forth.
Fifth. In a stone-dressing machine, the combination of the fixed supporting frame
or base having a propelling screw-shaft, mechanism for rotating said shaft in either
direction, a primary carriage adapted to travel on said fixed support, a rotary
support adapted to rotate on the primary carriage, a secondary carriage adapted
to travel on the rotary support, and intermediate mechanism, substantially as
described, connecting said primary carriage, rotary support and secondary carriage
to the shaft, whereby they may be independently connected with and disconnected
from said screw-shaft, as set forth.
Sixth. In a stone-dressing machine, the combination of the fixed supporting
fraino or base having a screw-shaft, mechanism for rotating said shaft in either
direction, a primary carriago adapted to travel on said fixed support, a rotary
support adapted to rotate on the primary carriage, a secondary carriage adapted to
travel on the rotary support, intermediate mechanism, substantially as described,
connecting said primary carriage, rotary support, and secondary carriage to the
shaft, whereby they may be independently connected with and disconnected from
the screw-shaft, and locking devices whereby said connecting and disconnecting
devices are locked in either of the conditions in which they may be placed, and
thus prevented from accidental movement, as set forth.
Seventh. In a stone-dressing machine, the combination of the fixed supporting
frame or base having a screw-shaft, mechanism for rotating said shaft in either
direction, a primary carriage adapted to travel on said fixed support, a rotary
support adapted to rotate on the primary carriage, a secondary carriage adapted to
travel on the rotary support, mechanisin, substantially as described, connecting said
primary carriage, rotary support, and secondary carriage to the shaft, whereby
they may be independently connected with and disconnected from the screw-shaft,
and locking devices whereby the primary and secondary carriages may be prevented
from independent motion when disconnected from the screw-shaft, as set forth.
Eighth. In a stone-dressing machine, the combination of the fixed supporting
frame or base having flanges or tracks, a screw-shaft, operating mechanism for
said shaft, the primary carriage adapted to travel on the tracks and having a
movable half-nut adapted to engage with the screw-shaft, a locking device adapted
to prevent the movement of the carriage on its tracks, and mechanism connected
therewith whereby the half-nut may be disengaged from or engaged with the
screw-shaft, and the locking device simultaneously made operative or inoperative,
as set forth.
Ninth. In a stone-dressing machine, the combination of the fixed supporting
frame or base having a screw-shaft, operating mechanism for said shaft, the
primary carriage adapted to travel on said baso, and provided with mechanism,
substantially as described, connected therewith, whereby it may be engaged with
or disengaged from the screw-shaft, the rotary support journalled on an arbor
or pivot supported by the primary carriage, and supported by said carriage, the
worm I engaged with the worm-wheel 2 forming a part of the rotary support, and
intermediate mechanism, substantially as described, connecting said parts, whereby
said worm may be connected with and disconnected from the screw-shaft, as set
forth.

page_text: Tenth. In a stone-dressing machine, the combination of the fixed supporting.
frame or base having a screw-shaft, operating mechanism for said shaft, the
primary carriage adapted to travel on said base, and provided with mechanism,
substantially as described, whereby it may be engaged with or disengaged from the
screw-shaft, the arbor E journalled in the primary carriage and provided with the
worm-wheel N and pinion P, mechanism, substantially as described, whereby said
worm-wheel and arbor may be rotated by the screw-shaft, the rotary support
journalled on the arbor, mechanism, substantially as described, whereby said
support may be rotated in either direction by the screw-shaft, and the secondary
carriage D adapted to travel on and rotate with the rotary support, and provided
with a rack R meshing with the pinion P on the arbor E, as set forth.
Eleventh. In a stone-dressing machine, the combination of the fixed base or
support having the screw-shaft, operating mechanism for said shaft, the primary
carriage adapted to travel on said base, and the secondary carriage supported by
the primary carriage and adapted to move independently thereof, as described, and
mechanism connecting the same whereby either carriage may be put in operative
connection with the screw-shaft, the other being at the same time disconnected
from the said shaft and made inoperative, as set forth.
Twelfth. The combination of the screw-shaft S, primary carriage D, nut T
engaging with the shaft, lever q connected to the nut and engaging with rack 8,
and shaft v. carrying pinion u also engaging with the rack, as set forth.
Thirteenth. The combination of the screw-shaft S, primary carriage D, half
nut T engaging with the shaft, lever q connected with the nut and engaging rack 8,
shaft carrying pinion also engaging with the rack 8, and cam 2¹ on shaft v
operating clamp f¹, as set forth,
Fourteenth. The combination of the screw-shaft S, primary carriage D, sliding
half-nut T engaging with the shaft, lever 9 connected with the nut and engaging
rack 8, shaft v carrying pinion u also engaging rack 8, arbor E having worm-
wheel N and pinion P attached thereto, swinging frame j¹ connected with the
half-nut by link 1, the worm O journalled in the frame and engaging with a
gear-wheel on the screw-shaft, and the secondary carriage having a rack engaging
with the pinion on the arbor E, as set forth.
Fifteenth. The combination, with a reciprocating carriage for carrying a stone to
be dressed, of the arbor E having the flanged worm-wheel N, the brake o'
embracing the flange of the worm-wheel, the swinging frame having the worm O,
and the dog s¹ having an arm engaging with the frame j¹ and adapted to compress
the brake, as set forth.
Sixteenth. In a stone-dressing machine, the combination with a horizontally-
adjustable rotary carriage, of an overhanging rotary cutter adapted to form a
moulded edge upon a slab of stone placed upon the rotating carriage, and
connections, substantially as described, whereby both are driven from the same
shaft, as set forth:
Seventeenth. The combination of the cutter-spindle, the sleeve carrying said
spindle having an arm j', and the turret g' journalled on said arm and adapted to
hold a series of cutters and present either of them to the spindle, as set forth.
Eighteenth. The combination, with a work-supporting carriage having slots, of a
clamp composed of a slotted plate having bolts for engagement with the slots in
the carriage, a jaw connected with the clamp, and a stop adapted to bear against
the edge of a slab on the carriage, as set forth.
HASELTINE, LAKE & Co.,
For the Applicant.