Improvements in Stoneworking Machines.
Year: 1887

page_text: Date of Application, 13th May, 1887
Complete Left, 13th Feb., 1888
Complete Accepted, 27th Apr., 1888
PROVISIONAL SPECIFICATION.
Improvements in Stoneworking Machines.
FRANK TRIER Civil Engineer 19 Great George Street, Westminster do hereby
declare the nature of my invention for IMPROVEMENTS IN STONE WORKING MACHINES
to be as follows:-
My improvements relate to machines with circular rotating cutters & consist in
the employment of these cutters on the slides of planing machines with tables
driven by a crank action. Where the length of the stone to be dressed renders the
direct action inconvenient or unwieldy the table is driven by a crank in connection
with the log & plank motion similar to that employed in printing machines, or the
circular rotating cutters are used in combination with any other means whereby the
traverse of the table is made greater than the stroke of the crank. My further
improvements relate to the tool holders which I so construct as that the skew necessary
for the proper working of the cutters is given to them & is reversed as required by
the alternating movement of the table & in the ready means of adjustment of the
toolholder to enable the cutters to operate in horizontal, vertical or inclined planes.
My improvements consist further in the method of cutting out internal angles by
means of one or more than one cutter mounted on slides which converge & can be put
in motion either separately or coupled together.
I place the axes of the converging cutters either in one plane or in different
planes.
My improvements also relate to crank driven slides carrying circular rotating
cutters operating across the direction of movement of the table; this arrangement is
useful for dressing & squaring the ends of stones, & I prefer for this purpose to use
two slides approaching each other from opposite sides of the stone.
My improvements also relate to the grindstone working machine described in my
Patent No. 341. 1883 with reference to Figures 32 & 33 of the drawings & consist
in canting the table carrying the stones to facilitate the operation of turning them
over.
Dated this 15th day of May 1001.

page_text: I, FRANK TRIER Civil Engineer of 19 Great George Street, Westminster do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
My invention relates to machines with circular rotating rolling cutters whether tubular
conical or discoidal & consists in the employment of such cutters on the slides of
planing machines with tables driven by a crank action, either direct or through the
intervention of the log & plank motion or by a crank action in connection with other
means whereby the traverse of the table is made greater than the stroke of the crank.
The advantages of this combination consist chiefly:
1) In the gradual starting of the table carrying the stone at the beginning of the
traverse, thus gradually setting the cutter or cutters in motion when they come into
contact with the stone. The edges of the cutters are thus preserved, as when once
started their subsequent speed can be very great.
2) The cutters being free to roll & not limited in their speed & the action of a crank
being mechanically the most advantageous mode of giving to considerable masses a
reciprocating movement: the combination allows of a more rapid movement of the
stone than would be practicable if the crank were employed without the rolling cutters,
or the rolling cutters without the crank.
In the accompanying drawings Figs. 1 & 2 show respectively in end & side
elevation a stone planing machine embodying the above combination. S is the stone
carried on the table B. The latter rests on the wheels D D... of the trolley A. In the
centre of the trolley is a spurwheel E gearing into the rack 6 under the table & also
into the rack c fixed to the bed C on which the wheels D run. The trolley A is con-
nected to the crank F by the connecting rod G.
The stroke of the crank & consequently the traverse of the table is variable by
shifting the crank pin L. The standard H carries the two double slide rests MO & N P.
The latter carry the tool holders T T with the cutters x, y. The rachet wheel w works
the screws m & n by which the cutters are fed downwards & upwards respectively. The
standard I is united to H by the distance piece K. J is one of several brackets fixed
on the table B with a rail R bridging from one to the other. This rail bears against
the roller V & has the object of taking the side pressure of the cutting.
The operation of dressing the stone is as follows:
The trolley A is moved to & fro by the crank F. The wheel E engaging in the
racks both on the bed & the table forces the latter to roll double the distance of the
trolley thus producing a long traverse for dressing a long stone with a comparatively
short crank.
The cutters X approach each other by the amount of the feed at each end of the
stroke & dress off the inequalities of the surface by their well known rolling wedge
action. By swivelling the cutterholder into the position shown in Fig. 3. the cutter y
is brought into action & the top horizontal surface can be dressed a certain distance
from the edge. The same operation can be performed on the bottom horizontal
surface by the cutter y on the slide P. It will be seen how greatly the adoption

page_text: of a double toolholder facilitates dressing adjacent surfaces. The log & plank motion
is shown above in its most perfect form, but the trolley can be dispensed with; the
suitably guided bearings of the spurwheel E being attached direct to the connecting
rod. The table is then provided with slides or rollers, or the latter are attached to the
bed. By linking the connecting rod direct to the table B, it can be reciprocated
without the intervention of the trolley, but then the table only travels the length of
the crank stroke. In this case the trolley although greatly assisting to reduce friction
can be dispensed with & the table made to move on slides or rollers.
Although I consider the log & plank motion the best means of augmenting the
traverse of the table, a similar end may be attained by other means, as for instance by
attaching the connecting rod to the short arm & the table to the long arm of a
swinging lever. The construction of the machine shown may be termed that of a side
dresser, but I do not in any way confine myself to this construction. The two double
slide rests may be carried on a horizontal cross slide, when the machine would be termed
a topdresser-or for certain purposes the main slide may be inclined & the slide rests,
if more than one combined in various ways.
The advantage of the sidedresser as compared with the topdresser consists
principally in the immediate falling away of all chips & dust produced, which in the
top dresser are apt, without special appliances to obviate it, to remain in the path of
the cutters tending to injuriously effect them & their work.
The employment of two cutters approaching each other i.e. dressing from opposite
sides of the stone not only augments the amount of work done, but prevents the
breakdown of the edges of the stone which would result if a cutter entering on one
side were allowed to go off on the other. Or one cutter may be so adjustable as to
dress first from one side & then from the other to prevent breakage of the arriss.
My invention further relates to the cutting out of internal angles.
Fig. 3 shows an arrangement of toolholders in which the cutter on the slide P is
carried on a bracket Q, which holds it in such a position that it can be brought in
front of the cutter on the slide O. The former cutter is shown working horizontally,
the latter vertically & by their combined action they produce an internal angle. I
have shown the cutters in this figure as placed one in front of the other, but I also for
some purposes place the cutters inclined to one another as in this figure but with their
axes lying in one plane.
My invention further relates to machines for dressing or turning grindstones by
means of rolling cutters. Figs. 4 & 5 show one of these machines in which the
stone S is placed on the revolving faceplate A. The cross slide B has a hinge H & can
be raised as indicated by the arrow.
B carries the slide C with the surfacing cutter æ, & the slide D with the cutter y
for turning the circumference. The face plate A is attached to its shaft by the
trunnions a, a, so that it can be canted up into the dotted position. The object of this
is to bring the stone into a nearly vertical position, when it can be easily slung,
turned round & fixed again to the face plate, which is then brought back into a
horizontal position.
The process of dressing is as follows: The cutter first surfaces the rough side of
the stone, being automatically fed by the worm & worm wheel & the cutter y is at the
same time worked down the edge of the stone as far as the dogs holding it will allow.
The cross slide B is then raised, the table is canted, the stone turned over & the table &
cross slide replaced. The second side & the remainder of the circumference is then
turned.
Having now particularly described & ascertained the nature of my said
invention & in what manner the same is to be performed, 1 declare that what I
claim is :
In a stoneworking machine the employment of rolling cutters whether tubular,
conical or discoidal & whether used for splitting or shaving off the stone, in
combination

page_text: log & plank motion substantially as shown & described with reference to Figs. 1 & 2 of
the accompanying drawings.
2) with a reciprocating table driven direct by means of a crank action substantially
as described.
3) with a reciprocating table driven indirectly by a crank action, but with the inter-
vention of other means than that claimed in the first claim for making the traverse of
the table greater than the stroke of the crank.
4) In a stone dressing machine using rolling cutters, the double toolholder
enabling one or the other cutter to be brought into action on adjacent faces of the
stone substantially as shown & described with reference to Figs. 1, 2 & 3.
5) In a stonedressing machine two or more than two rolling cutters acting together
to produce an internal angle substantially as described with reference to Fig. 34.
6) The arrangement in a stone dressing machine with a crankdriven reciprocating
table and using rolling cutters whereby the vertical or nearly vertical face of the stone
is dressed upwards & downwards by one cutter or by two or more than two cutters
arranged for dressing upwards & downwards & whereby the sidepressure is met
substantially as described with reference to Figs. 1 & 2.
7) In a machine for turning grindstones by means of rolling cutters, the employ-
ment of a canting faceplate to facilitate turning over the stone substantially as shown
& described with reference to Figs. 4 & 5.
Dated this Eleventh day of February 1888.