Year: 1896

page_text: Date of Application, 28th Feb., 1896
Complete Specification Left, 27th Nov., 1896-Accepted, 9th Jan., 1997
Date of Application, 28th Feb., 1896
Complete Specification Left, 27th Nov., 1896-Accepted, 9th Jan., 1997
I FRANK TRIER of 19 Great George Street Westminster London Civil
Engineer do hereby declare the nature of this invention to be as follows:-
My improvements relate to machinery for working stone with circular rolling
cutters & consist :
In the combination of rolling cutters with endless chains or bands to which
I impart movement, in the construction of the chains & bands carrying the rolling
cutters, in the construction of the toolboxes or cuttercarriers, in the arrangements
of the cutters relatively to each other, in the construction of the machines carrying
the chains or bands & in tools or apparatus for dressing grindstones & the like
with rolling cutters.
Rolling cutters have hitherto been used, for dressing stone attached to tool-
holders of machines in which reciprocating mevement is imparted either to the
toolholders or to the stone, or these cutters have been mounted on revolving chucks.
Both methods have disadvantages, the first is slow & the last produces circular
instead of straight toolmarks.
In my invention I combine one or more than one rolling cutter with any or each
of the links of one or more than one endless chain or with bands, which I drive by
suitable gearing.
This method of applying rolling cutters unites the advantage of the reciprocating
cutter in producing straight toolmarks with the advantages of the revolving chuck
in having a continuous motion & permitting the employment of a considerable
number of cutters to expedite the work & to carry out the valuable principle of
stepcutting.
One form of chain on which I carry the rolling cutters I construct as an endless
series of sliderests linked together & passing when the cutters are in operation in a
suitable slide. The cutters are held in these sliderestlinks which pass round
suitably constructed sprocket wheels the teeth of the latter engaging with corre-
sponding sockets in the former.
In another arrangement I combine the rolling cutters with chains or bands in
such a way that the sliderests or toolboxes which carry the cutters are held
between two suitably constructed chains or bands, the latter passing over chain-
wheels or pullies.
generally prefer to hang or suspend the toolboxes to the chains or bands in
such a manner that their weight shall always keep them in the position necessary
for entering the slides in which they are guided whilst the cutters are at work.
I also provide means to ensure the correct position of the toolboxes for entering
the slide. I arrange the cutters in various ways so as to stepcut or work mouldings.
I construct the machines carrying the cutterchains in various ways according to my
desire to dress surfaces horizontally, vertically or at an angle & I may combine
more than one cutterchain in one machine.
In machines constructed to work the vertical surfaces of the stones & using
cutterchains in which the toolboxes are the links or firmly attached to them, I may
employ a bed & table on each side of the mainstandard so that with one chain two
stones can be dressed simultaneously, the one by the ascending, the other by the
descending cutters.

page_text: When the toolboxes are freely suspended between two chains or bands, they
would have to be turned over to work both ascending & descending.
I also construct machines in which the tracks of the cutters are in planes
parallel or nearly so to the surfaces to be dressed. In these machines generally
prefer to incline the cutters so that they ent internally &, if the stones are not too
long, encircle the material to be removed.
construct the toolboxes preferably with arrangements for rapidly adjusting &
setting the cutters.
In my apparatus for dressing grindstones & the like I carry the cutterhead on
two shafts instead of on a slide & I support them in the ends of a frame which
contains a wormrack.
One of the shafts is splined & passes thro' & is used for turning a worin in the
cutterhead which engages with the rack. The other shaft which serves as a second
guide passes thro' a radial hole in the cutterhead to enable the latter to be sut at
the required angle.
Dated this Twenty-seventh day of February 1896.
Improvements in Machinery for Working Stone and the like.
I FRANK THIER of 19 Great George Street Westminster, London Civil
Engineer do hereby declare the nature of this invention and in what manner the
Bame is to be performed, to be particularly described and ascertained in and by the
following statement:-
My improvements relate to machinery for working stone with circular rolling
cutters & consist :-
In the combination of rolling cutters with endless chains or bands to which
1 impart movement, in the construction of the chains & bands carrying rolling
cutters, in the construction of the toolboxes or cuttercarriers, in the arrangements
of the cutters relatively to each other, in the construction of the machines carrying
the chains or bands & in tools or apparatus for dressing grindstones & the like with
rolling cutters.
Rolling cutters have hitherto been used for dressing stone attached to too!-
holders of machines in which reciprocating movement is imparted either to the
toolholders or to the stone, or these cutters have been mounted on revolving chucks.
Both methods have disadvantages, the first is too slow, & the last produces
circular instead of straight toolmarks & defective arrisses.
In my invention I combine one or more than one rolling cutter with any or each
of the links of one or more than one endless chain or with hands, which I drive by
suitable gearing.
This method of applying rolling cutters unites the advantage of the reciprocating
cutter in producing straight toolmarks, with the advantages of the revolving chuck
in having a continuous motion & permitting the employment of a considerable
nun-ber of cutters to expedite the work & to carry out the valuable principle of
stepcutting.
In Figs. 1 & 2 of the accompanying drawings one form of chain with which
I combine rolling entters is shown.
It consists of an endless series of boxlike liderests 1. 2. 3. ... linked together
& which carry the cutters 4. 5. 6. . . . . These sliderests or links pass round
sprocket wheels (8. 8) & thro' straight slides in which they are firmly guided
whilst the cutters are in contact with the stone. Two of the links (one in section)

page_text: contained in the slides are shown in Fig. 2. I prefer to carry the cutterspindles
in excentric cutterholders (19) & which can be firmly clamped in sockets formed
in the links. By revolving & moving the cutterholders axially, the cutters are
readily adjusted. The chain receives its movement by means of the sprocket-
wheels, the teeth of which engage with corresponding pockets in the links.
I also combine rolling cutters indirectly with chains or bands by using the latter
to draw the cuttercarriers thro' the guiding slides. For this purpose I sometimes
suspend the cuttercarriers between two chains or bands in such a manner that their
weight keeps them in the position necessary for entering the slides..
I construct the machines enrrying the cutterchains in various ways according to
my desire to dress surfaces horizontally, vertically or at an angle & 1 sometimes
use more than one cutterchain in one machine.
Fig. 1 shows in elevation a machine in which the cutterchain revolves in a
vertical plane & in which the cutters dress the sides or vertical surfaces of the
stones. In this type of machine two stones can be dressed simultaneously, one on
one side of the main standard (7) by the ascending & the other on the opposite
side of the standard by the descending cutters. 8. 8 are the sprocket wheels carried
on the standard & driven by the spurwheel 10 & pinion 9 & pulley 11. 18. 18 are
the beds containing a wormshaft, the worms on which gear with racks under the
tables 17. 17. 12. 12 are brackets placed at each end of the table which serve to
fix the stones & to carry the rails 15. 15, against which the rollers 14. 14 bear for
the purpose of taking the thrust of the cutters on the face of the stones 16. 16.
When the toolboxes are freely suspended between two chains or bands the cutters
can only dress one stone as they always face the same way both ascending &
descending.
For dressing thin stones, such as flags, & for the purpose of working mouldings
I construct the machines with a standard each side of the bed & carry the sprocket
wheels & chain on a cross girder moving, for the purpose of adjustment for the
different thickness of stones, vertically on the standards.
The cutters travel horizontally across & at right angles to the movement of the
table & dress the top surfaces of the stones.
I also construct machines in which the plane of the chain of cutters is not at
right angles to the surfaces to be dressed as in Fig. 1, but in which this plane is
parallel to the surface to be dressed. In these machines I prefer to incline the
cutters so that they cut internally as shown in diagram Fig. 3.
The cutters encircle the material to be removed & the removal takes place when
the stone travels out of the encircling cuttertrack in either direction as indicated
by the two arrows.
Fig. 4 is a diagram of the cutters when adjusted to work in steps for the purpose
of taking heavy cuts & finishing without plucking. Cutter z commences the work
followed by y &c. For instance 18 cutters would be arranged in 6 sets of 3 cach
or 20 cutters in 5 sets of 4 each.
Fig. 5 is a diagram showing the way of working a moulding. This can be done
(preferably with a horizontal chain) either by placing the cutters so that their
tracks will form the contour of the moulding or the latter can be worked by
dressing away the material to be removed in successive layers; the depth of cach
layer is determined by the amount of the descent of the cross slide when the
cutters are all set to work in one plane, or by the distance they are stepped (Fig. 4)
when the cutters are set to work in more than one plane. I use cutters dressing
horizontally with cutters set to work vertically & co-operating with the former to
cut out angles etc. I also provide detachable cutterholders with wide ranges for
adjustment on the sliderests & with cutters set at various angles to suit different
classes of work.
I also construct machines for dressing curved surfaces & in which the links or
the cuttercarriers move in curved guides.
In order to increase the distance between the ascending & descending cutters &
to avoid unduly increasing the diameters of the sprocketwheels, I run the chains

page_text: or bands over several sprocketwheels, for instance over 4 wheels, their centres
forming a square or rectangle.
I do not confiue myself to the specific forms of chains or machines shown &
described but can vary the combination of rolling cutters with different types of
chains or bands & the application of the latter to machines of different types.
In my apparatus for dressing grindstones & the like, I carry the cutterhead as
shown in two views in Figs. 6 & 7, on two shafte 22 & 24, instead of on a slide, &
I support these shafts in a frame which is provided with a wormrack 21. A worm 20
carried in the cutterhead gears with this rack & is turned by means of shaft 22,
which is splined or otherwise movably attached to the worm.
The shaft 24 serves as a second support to the cutterhead & passes thro' a
sleeve 26 placed in a curved slot 27 of the cutterhead. The latter can therefore
be tilted to the required angle for cutting the stone & securely fixed in this position
by clamping the sleeve to the cutterhead by means of the nut 25.
Having now particularly described & ascertained the nature of my said inven-
tion, & in what manner the same is to be performed, I declare that what I
claim is:
1) In machinery for working stone & the like the combination of one or more
than one rolling entter with any or each of the links of one or more than one
endless chain or with bands.
2) The construction of the chain, carrying rolling cutters, substantially as
described & shown in Figs. 1 & 2 of the accompanying drawings.
3) The construction of machines carrying the chain or chains of rolling cutters
substantially as shown & described.
4) The apparatus for dressing grindstones & the like substantially as described
& shown in Figs. 6 & 7 of the accompanying drawings.
Dated this 26th day of November 1896
FRANK TRIER.