IMPROVE- MENTS IN MACHINERY FOR DRESSING MILLSTONES
Year: 1877

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake; & Co.,
Patent Agents, Southampton Buildings, London, for the Invention of "IMPROVE-
MENTS IN MACHINERY FOR DRESSING MILLSTONES." A communication from
abroad by Walter Griscom, of Pottsville, Pennsylvania, United States of
America.
Sealed the 20th July 1877, and dated the 16th February 1877.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at
the Office of the Commissioners of Patents on the 16th February 1877.
William Robert Lake, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN MACHINERY FOR DRESSING
MILLSTONES." A communication from abroad by Walter Griscom, of Pottsville,
Pennsylvania, United States of America.
This Invention relates to improvements in diamond millstone dressing machines.
The said machines have a longitudinally sliding frame and a transversely sliding
carriage which carries the cutting tool, and one object of this Invention is such a
construction of the said carriage as will permit of its easy adjustment for the cutting
of furrows, as herein-after described.
In other machines the carriage reciprocates in transverse guides which form a
part of, or are rigidly attached to the longitudinally sliding frame; such a construction
renders it impossible to dress furrows without setting up the cutter by the hand-
wheel at the end of each longitudinal stroke. To obviate this difficulty I form a
separate bed for the carriage, upon the sides of which bed I form carriage guides,
and place upon one of its ends the mechanism which actuates the carriage in its
transverse throw. This bed is pivoted between two ears formed on the aforesaid
frame, and is controlled by thumb nuts upon screws projecting from the bed, and
bearing against standards set upon the frame to hold the bed at any desired inclina-
tion. At the end opposite to that supporting the actuating mechanism it is con-
trolled by a thumb nut upon an upright screw secured to an ear upon the frame,
and bearing upon an ear of the bed.
When the inclination is considerable it may be necessary to provide a rocker
with an adjustable toe to act upon latches, whatever the approximately vertical
position of the toe may be.

page_text: This improved machine is equally well fitted to dress the "land" or any level
surface.
It is often desirable to dress deeply toward the eye or toward the skirt of the
stone, and it is usual to block up the bed plate by wedges of paper or the like to
effect such deep dressing, but the disadvantage of this crude contrivance is that
when it is necessary to alter the position of the machine the paper may be blown
away or wrongly replaced, whereby the inclination of the machine is altered, and
the dressing consequently made irregular.
The object of one part of this Invention is to remedy this disadvantage and
furnish the means by which any desired inclination can not only be given to the bed
plate and cutting tool, but also be invariably maintained, to which end it consists,
substantially in the adjustable base plate herein-after described. For this purpose
I combine with an adjustable base plate a plate of the same size as the bed plate,
and fitted to the bottom of the same by means of screws or similar devices, so that
when the screws are tightened the base plate is firmly connected to and forms a
part, so to speak, of the bed plates, in which position the dressing will be level.
When it is desired to dress deeply at one end or side of the stone the screws con-
necting the plates are loosened, and sufficient paper or other material is inserted
between the two plates at the end or side opposite to that at which it is desired to
cut deeply to give the desired inclination to the bed plate, and consequently to its
cutter. Then the screws are tightened upon the paper, so that when necessary
the machine can be moved from point to point without any possibility of alteration
in its cutting inclination...
According to a modification of this Invention I provide the said machine with a
ring frame nearly of the same diameter as the millstone on which it is to be used.
This ring has arms united in a boss or hub at the centre; this hub has an opening
large enough to allow the spindle and washer of a millstone to pass through it.
One part of the said frame is extended outward over or beyond the skirt or circum-
ference of the millstone. The arms and hub of the said frame do not come in
contact with the face of the millstone, but the circular portion or ring must be
planed or turned true. On this frame, at the part where it projects over the skirt
of the millstone, I place the dressing machine. The bottom of the bed plate or frame
of the said machine need not be dressed or planed smooth except at the ends where
it is fastened to the frame by bolts and wing nuts. The end of the said machine
which extends beyond the circumference or skirt of the millstone is so pivoted on
the bolt which fastens it to the frame as to move horizontally, and is hinged to
move vertically: The end of the said machine adjacent to the centre of the frame is
fastened by the head of a bolt entering a slot in the arm of the said frame, so that
by loosening the wing nut on the bolt this end of the machine can be turned
horizontally on its pivot bolt at its other end to adjust the machine to suit the
"furrows" or "lands" of the millstone.
Either end of the machine may be raised vertically a short distance by loosening
the bolts which fasten it to the frame, and placing a piece of paper or other suitable
substance between the bed plate of the machine and the frame upon which it rests.
The "furrows" of a millstone generally have a pitch from the centre to the cir-
cumference, and it is sometimes desirable to dress the "lands" deeper at the eye
than at the skirt of a millstone, and for this reason it is necessary to incline the
machine as above described.
23
"
As one "land or one "furrow" is dressed the said frame with the machine on
it is moved around into the position required for dressing the next " furrow
land," and so on till the millstone is entirely dressed.
6f
In some instances the said machine may be used without the ring frame.
or
In another modification of the said Invention the machine has a moveable trans-
verse tool, carrying frame, and tripping bar for operating on opposite sides of the
stone and cutting the grooves at any desired inclination; in combination with the
above there is an automatic feeding device. I construct the machine with radial
arms and bifurcated clamping bars for holding it properly in the stone. A spring,

page_text: a pin, a packing ring, and set screw are arranged in combination with the bed plate
and frame of the machine. There is also a bevel pointed set screw, a screw-threaded
tool holder, and screw shaft provided with a hand wheel for turning it to adjust
the above parts which act in combination with a sliding tube, a spring, and a
slotted sleeve, and with a sliding pin and slotted bar. In combination with the
said tripping device I arrange a cam lever on a shaft, and a spring dog for facilitating
the action of the said device.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Robert Lake in the Great Seal Patent Office on the
15th August 1877.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, and Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN MACHINERY FOR DRESSING
MILLSTONES." A communication from abroad by Walter Griscom, of Pottsville,
Pennsylvania, United States of America.
This Invention relates to improvements in diamond millstone dressing machines.
of that class in which there is a longitudinally sliding frame and a transversely
sliding carriage or frame which holds the cutting tool, and the object of one part
of the said Invention is such a construction of the said carriage as will permit of its
easy adjustment for the cutting of furrows, as herein-after described.
This part of the said Invention is illustrated in Figures 1 and 2 of the Drawing.
Figure 1 is an end elevation of my improved machine in position for dressing the
land, and Figure 2 is a similar view of the same in position for dressing the
furrows.
A is the bed plate of the machine; B, the longitudinally sliding frame; C, the
transversely sliding carriage which carries the cutting tool. In such machine, as,
formerly constructed, the carriage reciprocates in transverse guides, which form a
part of, or are rigidly attached to, the longitudinally sliding frame; such a con-
struction renders it impossible to dress furrows without setting up the cutter at the.
end of each longitudinal stroke. To obviate this difficulty I form a separate bed D
for the carriage, upon the sides of which bed are formed the carriage guides E, and
upon one end is placed the mechanism which actuates the carriage transversely.
This bed is pivoted at one side between two ears Q formed on the frame B, and at
the other side is controlled by thumb nuts F upon screws K affixed to and pro-
jecting laterally from the bed D, and bearing when tightened up against curved
slot standards G, set upon the frame B, to hold the bed D at any desired inclination.
At the end opposite to that supporting the actuating mechanism the bed is con-
trolled by a thumb nut H upon an upright screw I, which is secured to an ear L
upon the frame B, and when tightened bears upon an ear J of the bed D.
It is obvious that by loosening the thumb nuts F and H, giving to the car-
riage bed D an inclination corresponding with that of the furrow to be dressed,
and then tightening up the nuts the cutting bit will travel down or up the trans-
verse incline of the bed D, and consequently in a longitudinal direction stroke by
stroke down or up the incline of the furrow.
When this inclination is considerable it may be necessary to make the toe m of
the rocker M adjustable in its length to ensure its encountering the latches V,
whatever may be the approximately vertical position of the said toe.
A modification of this part of the said Inveution is represented in Figures 3
and 4 of the Drawings; Figure 3 is an end elevation of a machine set for land
dressing, and Figure 4 is a similar view of the same in a position for dressing
furrows.
A is the bed plate proper of the machine; B, its sliding frame, carriage, and
actuating mechanism; C is a fixed base plate, the under surface of which is made

page_text: perfectly true, while the upper surface of its end cross pieces D rises from both
sides to a common central elevation E. Upon the summit of this elevation are
mounted studs F, shown in dotted lines, and which pass through slots G in the cross
bars of the bed plate. The bed plate is pivoted by the aid of pins H upon the
base plate centrally in a longitudinal direction, so that if unsecured it could be
freely inclined to either side. Mounted upon the sides of the base plate are curved
slot standards I through which pass screws J projecting from the sides of the bed
plate. Upon these screws are fitted thumb nuts K, which serve when tightened to
secure the bed plate rigidly at any desired inclination with respect to the base plate.
Upon either side of the base plate wedge pieces L are pivoted in such manner that
when turned in upon both sides at the same time they support the bed plate in a
true horizontal position for land cutting.
It is obvious that by throwing the wedge pieces out of position beneath the bed
plate, loosening the thumb nuts, giving the desired inclination to the bed plate, and
again tightening up the nuts, the bed plate can be maintained at any inclination
corresponding to that of the furrow to be dressed, enabling the machine to dress a
furrow automatically in either direction, and with the same ease with which it can
dress a land, and no adjustment of the hand wheel will be necessary to set up the
cutter at the end of each longitudinal throw.
It is often desirable to dress deeply toward the eye or toward the skirt of the
stone, and it is usual to block up the bed plate by wedges of paper, or the like, to
effect such deep dressing; but this crude contrivance is very unsatisfactory, especially
for the reason that when it is necessary to alter the position of the machine the
paper may be blown away or wrongly replaced, whereby the inclination of the
machine will be altered, and the dressing consequently made irregular.
The object of another part of this Invention is to remedy this disadvantage, and
furnish the means by which any desired inclination can not only be given to
the bed plate and cutting tool, but also be invariably maintained. For this
purpose I provide the machine with an adjustable base plate, as shewn in Figures 5
and 6.
Figure 5 is a side elevation of a millstone dressing machine provided with my
base plate when the latter is not in use to adjust the cutting, and Figure 6 is a
similar view of the said machine with the said plate adjusted for deep cutting on
the left-hand side.
A is the bed plate of the machine; and B, the mechanism for carrying and
operating its cutter; C, the said adjustable base plate, which is of the same size as
the bed plate, and fitted to the bottom of the same by means of screws D or
similar devices, so that when the screws are tightened the said base plate is firmly
connected to and forms practically a part of the bed plate, in which position the
dressing will be level.
When it is desired to dress more deeply at one end or side than at the other
parts of the stone the screws connecting the plates are loosened, and sufficient
paper or other material is inserted between the two plates at the end or side
opposite to that at which it is desired to cut most deeply to give the desired
inclination to the bed plate, and consequently to its cutter; then the screws are
tightened upon the paper, so that when necessary the machine may be moved from
point to point without any possibility of alteration in its cutting inclination.
In Figures 7 to 13 I have shewn further modifications of this Invention.
Figure 7 is a plan; Figure 8 is a longitudinal central sectional view; Figure 9
is a side elevation; and Figures 10 and 11 are detail views; Figure 12 is also a
plan showing the machine reversed; and Figure 13 is an under side view showing
it applied to a stone.
.
A is the bed plate, which consists of a rectangular frame having radial and
slotted arms B, B₁, at its respective ends; C is a slotted and bifurcated clamping
bar, which is connected with the radial arm B by means of the thumb screw a.
The bifurcated portion of this bar C receives and holds a bolt c, which is secured
in the eye of the millstone being dressed; C¹ is a clamping bar attached to the

page_text: front or outer end of the bed plate. It is slotted and united with the radial arm B¹
by a set screw, as shown, and has a bifurcated inner end, which passes under the
bed plate, and when in use is pressed firmly against the periphery of the millstone.
By means of the clamping bars C and C¹ the radial arms, set screws, and bolt c,
the operator is enabled to attach the bed plate firmly to the millstone, and to
adjust it thereon at will; D is a rectangular frame, pivoted at its rear end to the
bed plate, and provided with dovetailed bars or grooves d, d, within which the
cross frame is moved.
An adjusting device is arranged between the bed plate and frame D, as shewn
in Figure 11. This device consists of a screw e having a smooth point and passing
upward through the bed plate and into a recess in the corner of the fraine D.
The point of this screw is not threaded, and its middle portion within said recess
is surrounded by an india-rubber packing ring f, which closes said recess against
dust; g is a set screw which passes through the corner of frame D, and has its
point resting upon the point of the screw or pin e, as shewn in Figure 11; E is a
large set screw having a bevelled point; this screw passes through the front cross
of the bed plate, and its point rests in a bevelled recess h¹ formed in the front cross
bar of the frame D. By forcing the bevelled point of this screw into the bevelled
recess the frame D will be slowly raised, and the said frame will be gradually
lowered as the point is withdrawn..
At y, Figures 7 and 11a, I have shewn a curved spring attached to the front cross
bar of the bed plate, and sustaining upon its points or ends the front end of the
frame D. The set screws e, g, and E, with the spring and recesses, enable the
operator to accurately adjust the frame D upon the bed plate to the pitch or
inclination desired, and obviate the necessity of using paper or other wedges for
that purpose.
H is the carriage, arranged to work in dovetails or grooves d in the frame D.
It is provided with an upright screw threaded bar or cylinder above the diamond
cutting tool, as shewn, and a spring / rests upon or within the sleeve i. The said
sleeve has a slot in its side; is a pin attached to the case of the tool holding bar
or cylinder; m is a sleeve which encloses the pin 1, and is secured and adjusted
thereon by a set screw n; to the outer end of this sleeve is attached a bar O. By
means of the pin l, sleeve m, set screw n, and bar O, the operator is enabled to
adjust said bar in any position required. P is a raised bar on a frame slotted
longitudinally, as shown; and is a sliding pin adapted to be securely held within
the slot of bar P, and to be moved therewith at will.
R is a sliding frame, which holds the diamond tool; it is arranged to move
in grooves or dovetails in the working frame, and has a wheel S attached to
screw-threaded shaft t enclosed within the raised stationary tube A¹ and its sliding
tube a¹; u is a tubular holder for the diamond tool. This holder has a screw
thread formed in its top, which receives the thread of shaft t. The diamond is
secured within a plug arranged in the open bottom of the holder. T is a screw
shaft which passes through nuts on the frame R for moving the same into its
grooved bed. To move said frame toward the front a crank is provided at the
front end of said shaft, and its rearward movement is obtained by the following
automatic apparatus, that is to say:-U represents a drum, within which is the rigid
central post and the cam lever w. A pin x passes through one end of said lever,
as shown, and a spring holds it. A slotted pendent lever or dog c¹ is pivotted to
the outer front wall of the drum, and has a bolt or stop gl secured to said wall and
within the slot of the pendent lever. Upon the side of the bed plate, and extending
upward, is the adjustable and removable tripping bar H¹ and its pin f¹, which are
designed to work in conjunction with the aforesaid devices to move the frame R
toward the rear automatically. This result is accomplished as follows:-As the
operator moves the working frame or carriage H to the front lower end of the
pendent lever it strikes the pin f¹ of the tripping bar H and turns the drum and
screw shaft, thereby causing the frame R to move to the rear upon the said working
frame.
h

page_text: When the working frame is moved rearward the pendent lever serves to lift the
gripping portions of the cam from its shaft, and prevents its engagement therewith
and movement of the screw shaft. Hence by the joint action of the devices named,
the frame R, and consequently the diamond tool, are moved gradually and auto-
matically rearward, thereby cutting or dressing that portion of a millstone which
is beneath the working frame with accuracy and precision.
When it is desired to operate the machine from the opposite side, to cut a groove
in the stone with a different inclination, the removable tripping bar H² is placed
upon the opposite side of the bed plate and the frame R reversed in its groove upon
the working frame. The frame R will then be automatically moved in the direction
desired.
Channels or grooves in millstones are formed in such manner that their bases
are inclined either to the right or left. To reach and dress such grooves by a
diamond implement the apparatus consists of the parts l, i, m, n, O, P, and r is
employed.
The operation of the same is as follows, namely:-By means of the set screw n
the bar is adjusted in a position corresponding with the base of the groove in
the stone, and the sliding pin is set to operate therewith. As the frame R is
moved rearward by the automatic devices above described the inclined bar O is
forced obliquely against the pin r and the diamond tool is pressed downward, as
shewn.
'
The above described apparatus is arranged to dress a groove inclined from the
left to the right. To dress a groove having an opposite inclination from the right.
to the left the frame R is reversed upon its sliding way, and the removable trip H¹
is set to the left hand side of the bed plate. The apparatus will then be ins
position to dress the said groove.
Figures 14 to 21 illustrate other modifications of my Invention.
Figure 14 is a side elevation with part broken away, and Figure 15 is a cross.
section on the line x, x, of Figure 14.
In these two Figures A is the main frame of the machine, composed of two parts,"
the one consisting of a base and a vertical portion, the other of a rectangular frame
provided with longitudinal ways fitting over the upright part of the first part, and
capable of being vertically adjusted upon it by means of the slots a, a, and clamp
screws a¹, a¹. B is the carriage moving longitudinally on the main frame, the said
main frame being provided with ways on its sides in which cleats fixed to the
carriage fit. The cleats are made adjustable by means of slots 62 and clamp
screws 6 on one side to the grooves to provide for the wear of the latter and cause
the tool to run "true." The handle by which the carriage is moved is attached to
its rear upper surface. C is a rectangular piece sliding in grooves c, c, formed by
attaching cleats c¹, c¹, to the upper surface of the carriage, and made adjustable
laterally by the transverse screw D which rotates in the upright projection d on
one side of the carriage, and acts upon a similar projection on the rectangular
piece C. One of the cleats c¹ is provided with slots c² and clamp screws c³ similar
to the slots and screws at b2 and 63. On the projecting outer end of the screw D is
fixed the pinion E which meshes with the wheel F. This wheel is provided on its
outer surface with the internal gearing f, with which the V shaped reversible
detent G engages, the latter being pivoted to the vibrating lever H that turns on
the shaft of the wheel F and carries the depending arm I pivoted near the middle
of the lever. The said arm is provided with a projection on its inner surface that
fits loosely in a notch in the lower end of the lever H, and allows but slight lateral
motion to the arm. The lower end of the said arm is pointed, to allow it to slip
easily over the projection J, which is made adjustable on a forwardly-inclined
arm fixed to the base of the main frame by means of the screws j. On the
upper surface of the rectangular piece C is firmly fixed the hollow cylinder K
through which the screw L for vertical adjustment of the tool holder M passes.
The upper portion of this screw is of greater diameter and has a finer thread
than its lower portion, which engages the upper portion of the tool holder M,

page_text: and to its projecting upper end is fixed the toothed wheel N. The lever O
imparts motion to a toothed cog wheel, and, thence to the screw L, being secured
over the former by a nut, and having attached to its under surface two projections, o o¹,
which carry the pawl P engaging the teeth of the wheel N. This pawl has an arm p
on its outer end which fits into corresponding grooves m on each side of the outer
projection o, and is surrounded by a spiral spring n. The pawl is thus reversible by
pulling the arm p from one of the grooves m, turning it half round, and allowing the
spring n to draw it into the opposite groove. The spring also makes it engage the
teeth of the wheel N. On the rectangular piece C is also fixed an adjustable
gauge R, which regulates the distance the lever O travels. This gauge is composed
of the standards S and bent arm T. The latter slides. in a hole in the former, and
its upright portion may be fixed at any distance from the standard by means of the
clamp screw 8.
The machine being in position on a millstone the ways and projections b, b², may
be adjusted parallel to its face by means of the slots and screws a, a. The tool is
then lowered to the surface of the stone by turning the lever O, the adjustable
gauge R regulating the number of teeth of the wheel N. The pawl P passes when
it is necessary to cut grooves with inclined bottoms. The pawl may press only one
tooth each time the carriage travels back and forth over the main frame. When it
is necessary to raise the tool the pawl is reversed, when the same motion of the
lever that before depressed now raises it. The tool being set the carriage B is
drawn by its handle to the rear of the main frame, where the arm I striking the
projection J will by means of the lever H and detent G turn forward the wheel F,
which will by means of the pinion E and screw D impart its motion to the.
rectangular piece C. The wheel F may be rotated a greater or lesser distance by
adjusting the projection J higher or lower on the inclined arm fixed to the base of
the frame. The detent G will not engage when the arm I passes back over the
projection J. When it is necessary to reverse the motion of the rectangular piece
the detent G is reversed by turning it over on its pivot.
Figure 16 is a plan of another machine for dressing millstones; Figure 17 is a.
side view; Figure 18 is a central vertical section; Figure 19 is an end view;
Figures 20 and 21 shew portions of the said Invention detached.
In these Figures A is a bed piece, open at one end and recessed at the other end
at a and at the sides to receive within it a frame B which is pivotted at one end as
shewn. The other end of the frame B is free, and is vertically adjustable by means
of a set screw C which works in a screw-tapped horizontal plate or lug b fast on
the rear end of the bed piece A. The frame B is composed of side pieces B¹ pro-
vided with V shaped longitudinal grooves b¹ and cross pieces B2, B². The front
cross piece B² is provided with a vertical stud 62. D is a carriage provided with
side tenons, which work in grooves b¹, allowing the said carriage to receive
longitudinal motion, while preventing any lateral displacement. This carriage has
a handle D¹ to facilitate its operation by hand and is confined to the frame B by
the plate or lug b at one end thereof, and by the stud 63 at the other end thereof.
The carriage D is slotted at D2 for the passage of the cutting tool and the lateral
adjustment of the same. E is a cross frame hinged to one side of the carriage D,.
and having its free end vertically adjustable by a thumb-screw F, which bears
against a lug or extension d attached to the carriage D. The cross frame E is pro-
tected from lateral displacement by means of small vertical standards or guides d², d¹,
secured to the carriage D. On the upper side of the hinged frame E are attached
guide rails or strips e, e, recessed as shown, making a dovetailed connection with
the cross slide or carriage G which is secured between them so as to be incapable of
motion except in a direction at right angles to the line of motion of the tool and
carriage D. The cross slide G is perforated to receive the tubular stock H, which is
tapped to allow the vertical adjustment of the screw-threaded rod I, that has on its
top a thumb piece i, and on its bottom a cutting point ¿¹.
The slide G is automatically adjusted laterally by the following. devices :—.

page_text: A horizontal screw-threaded rod J is journalled by a lug or box ; secured to
the frame E, and engages with a tapped lug j¹ secured to slide G. On the outer
end of the rod J is secured a flanged disc or drum K, with a central cylindrical
core k. In the annular space between the core k and the outer flange or rim k¹ of
the said drum is placed a curved excentric metal piece L provided with a curved
spring 1, loosely secured thereto by one end, and with a projecting pin ¹. A metal
piece L is loose within said drum, so that it may be turned freely therein in one
direction, but when turned in the other direction the spring / and the larger end of
piece L bind against the inside of rim k¹, and turn the drum K and rod J, thereby
causing the slide G to move across the frame of the apparatus in a direction at right
angles to the line of draught. As the frame E is slotted the slide G will carry the
tubular stock H and the cutting tool along with it. A pin on the metal binding
piece L passes through a perforation m in the rotating face plate M, which is also
perforated at m² to receive a central cylindrical core k. A plate M is also provided
with an ear m², in which is journalled a projecting rod m³, that is prevented from
rotating (except under considerable friction) by a pressure spring m. This plate
has also a projecting stud mo, which works in a curved slot n of a supplemental
plate N that has also an ear n¹ extending radially, and provided with a projecting
rod n².
.
Whenever either the rod m³ or the rod n² is struck by any obstacle their plates
will both turn, carrying around the loose metal piece L with the result herein-before
described. This action is effected by tripping rods or pieces O, which may either
be rigidly secured or held in place by springs or weights operating on cross arms o,
and arranged to engage with one or both of the aforesaid rods.
By detaching the plates M and N from the drum or flanged disc K, or by rigidly
securing them thereto, or by removing the rods or pieces O the lateral movement
of the slide G and rod J may be prevented. The cross frame E may be hinged or
pivoted at the middle instead of at one end, as above described.
Having thus fully described the said Invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim in connection with the parts of the said Invention illustrated in Figures
1 and 2 of the Drawings,-.
The carriage bed D pivoted to the sliding frame B, and adapted to be inclined
with respect to the same for dressing furrows, as above described.
Also as the means for adjusting the inclination of the said pivoted bed with
respect to the sliding frame, the thumbscrews, standards, and ears, arranged and
operating as above specified.
Also in combination with a pivoted carriage bed, the carriage C reciprocating in
guides, and the actuating mechanism, both being adapted to rock with the bed, as
above described.
And in the modifications of the said Invention illustrated in Figures 3 and 4 of
the Drawings,
A pivoted bed plate in a diamond dressing machine so arranged as to enable the
machine to dress either a right or left-hand furrow automatically, as above
described.
Also the wedge pieces L, as above described, for the purpose specified.
Also the combination of the pivoted bed plate, the curved slot standards, the
thumbscrews, and base plate C, the whole forming a device for maintaining the bed
plate at any desired inclination, as above specified.
Also the longitudinally adjustable base plate C, Figures 5 and 6, in combination
with the bed plate and the screws, as above set forth and for the purpose
specified.
And in the modifications. of my Invention shewn in Figures 7 to 13 of the
Drawings,
The radial arms B, B¹, and bifurcated clamping bars having set screws, as above
described, and for the purpose specified.

page_text: Also in combination with the bed plate A and frame D the spring y, the recesses,
the pin, the packing ring, and screws, as above set forth, and for the purpose
specified.
Also in combination with the tool holder u the screw shaft, the turn wheel, the
sliding tube, the spring, and slotted sleeve, as above described, and for the purpose
specified.
Also the pin and the adjustable sleeve and cam or bar in combination with the
sliding pin and slotted bar, as above set forth, and for the purpose specified.
Also in combination with the bed plate A and frames D and H the removable
transverse cross frame carrying the diamond tool with the automatic feeding device,
as above described.
Also the combination of the cam lever w working on its shaft, and having a
spring and dog with the adjustable and removable tripping bar, as above specified.
Also the combination with a longitudinally grooved main frame A of the carriage,.
the slotted cleats, and clamp screws, the tool holder, the vertical screw, the cog
wheel, the lever, the reversible spring pawl, and adjustable gauge R, as shown in
Figures 14 and 15, for the purpose specified..
:
And in the modification of my Invention shown in Figures 16 to 21,-
The combination of the bed plate A, frame B, with the longitudinally sliding
carriage D and hinged cross frame, vertically adjustable at one end thereof, as above
described, for the purpose set forth.
Also the combination of the screw-threaded adjusting rod and flanged disc or
drum with the loose binding piece, the spring and pin, the face plate, rod, and
tripping piece or lever, as above set forth, and for the purpose specified.
Also the combination of the slotted plate N, with the binding piece, connecting
devices, drum, adjusting rod, and actuating rods and levers, as above described, and
for the purpose set forth.
.
In witness whereof, I, the said William Robert Lake, have hereunto set my
hand and seal, this Fifteenth day of August, in the year of our Lord One
thousand eight hundred and seventy-seven.
W. ROBT. LAKE. (L.S.)