İmprovements in Apparatus or Machinery for Dressing, Shaping, and Moulding Stone.
Year: 1884

page_text: İmprovements in Apparatus or Machinery for Dressing, Shaping,
and Moulding Stone.
I FRANK HENRY JULIUS TRIER, Civil Eng. 19 Great George Street, Westminster
London S.W. do hereby declare the nature of my invention for DRESSING, SHAPING
& MOULDING STONE, to be as follows:-
My invention relates to improvements in the construction & combination of two
chucks (which I will call angling chucks) forming a pair & carrying circular
rotating cutters for the purpose of cutting out internal angles in stone-which
combination I also employ for forming the external angles or arrisses of stones by
operating simultaneously upon the adjacent faces.
The two angling chucks which form the pair above mentioned are each
constructed to carry one, or more than one rotating cutter-each cutter spindle
being carried by an arm of its chuck.
For certain purposes I fix more than one cutter on an arm, & I give to each
chuck one, or more than one arm.
I place the two chucks which form a pair in such a position relatively one to the
other, that their axes of rotation, while lying nearly in the same plane, (the
divergence being caused by the slight tilt given to the chucks for the purpose of
obtaining a clearance of the cutters on the back of their track) are inclined to one
another in that plane.
The most generally useful angle of inclination is ninety degrees-that is to say,
if the cutters of one chuck are cutting in a horizontal plane, the cutters of the
other chuck will be cutting in a vertical plane. I connect the two chucks by bevel
or mitre toothed wheels, or other convenient mechanical means, so that they shall
revolve together, & in gearing them arrange the arm or arms of each chuck so that
the arm or arms of one shall not in revolving come into contact with the arm or
arms of the other, but that each arm, when there is more than one, shall pass into
the space between the adjacent arms of the other; & thus the operation will
consist of a cut by the cutter or cutters on an arm of each chuck alternately-the
one cut for example vertical, the other horizontal.
For the purpose of forming an internal angle, the chuck or the cutters carried by
them are so placed relatively the one to the other, that the cutting action shall.
extend quite or nearly into the internal angle which their joint operation will
manifestly produce.

page_text: Though I speak of an angle of 90 degrees as being the most useful, I do not
confine myself to that angle-as the chucks may if required be placed at other
angles the one to the other.
Ι
In order to form external angles upon stones, I arrange the chucks or the cutters
which they carry, in such a manner that their action shall extend over planes
which cross each other; the line in which, the two planes meet will be the vertex
of the angle & will coincide with the arriss produced in the stone operated upon.
In operating with chucks carrying two or more cutters, & where it is desired to
produce at one operation more than one internal angle, I arrange the cutters of the
pair of chucks accordingly; & there will then be formed not only the internal
angles, but the external angles as well; forming as it were a step or steps between
the internal angles so produced.
In conjunction with a pair of angling chucks as above described, or with more
than one pair if desirable, I use one, or more than one moulding chuck such as
described in the Specification of Letters Patent granted to me & dated 1883,
20 January N° 341.
"
Also by making a sufficient gap or sufficient gaps in a moulding chuck to permit
of the passing of the arm or arms of an angling chuck, the moulding chuck becomes
also an angling chuck, & would constitute one of a pair.

page_text: COMPLETE SPECIFICATION. .
Improvements in Apparatus or Machinery for Dressing, Shaping,
and Moulding Stone.
I FRANK HENRY JULIUS TRIER, Civil Engineer of 19 Great George Street,
Westminster, London do hereby declare the nature of my invention for IMPROVE-
MENTS IN MACHINERY FOR DRESSING, PLANING AND MOULDING STONE and in what
manner the same is to be perfarmed, to be particularly described and ascertained
in and by the following statement :-
My invention relates to the combination and construction of two.chucks (which
I call angling chucks) carrying circular cutters which are free to rotate on their
axis, for the purpose of cutting out internal angles. in stone which combination
I also employ for forming the external angles or arrisses of stone by operating
simultaneously upon the adjacent faces. Fig. 1 is a front view and Fig. 2 a side
view of a machine. carrying a pair of angling chucks, the subject of my invention.
a is a standard on the face of which the saddle b can slide vertically and is raised
or lowered by means of the screw k, worm wheel h, worm i and handwheel w. The
small handwheels v, v, v are for clamping the saddle when in position. The
saddle b carries the shaft e to which are keyed the driving pulley g & one of
the pair of angling chucks c, the subject of this invention. The other chuck dis
free to rotate on the stud f which in order to obtain greater security and means of
adjustment is carried up to the top of the saddle, the shaft e passing through an
eye formed on f. The two chucks are geared together by means of the mitre
wheels zz. Each chuck is shown with four arms, each arm terminating in a jaw u
in which by means of the screw t the cutter holder m is clamped. The cutter-
bush n is carried excentrically in the holder m, so that by turning m the cutter can
be adjusted radially and by sliding m in its jaw the cutter can be adjusted in the
direction of its axis. The two chucks are geared together in such a manner that
the arms of the one shall in rotating not come into contact with the arms of the
other, but that each arm shall pass into the space between the adjacent arms of the
other and thus the operation will consist of a cut by a cutter of each chuck
alternately. The stone is carried on a table q which is made to slide on the table p
at right angles to the direction of the travel of p. The table p slides on the bed o
and is moved by the shaft 2, in the ordinary way of a planing machine.
For the purpose of forming an internal augle as shown on stone s in Fig. 2 the
cutters are so placed relatively the one to the other that the cutting action shall
extend as nearly as may be desired into the internal angle which their joint
operation will manifestly produce. In order to form external angles upon stones as
shown in diagram Fig. 3. I arrange the cutters in such a manner that their action
shall extend over planes which cross each other, the line in which the two planes
meet is the vertex of the angle and coincides with the arriss to be produced.
Although I have shown chucks with 4 arms and set at the most generally useful
angle of 90° I do not confine myself to this angle nor to the number of cutter
carrying arms. The cutters shown are of conical shape, but naturally ordinary
disc-cutters can be used.

page_text: In operating with chucks carrying two or more cutters I sometimes prefer
arranging the cutters so that they shall work on different levels; their joint action
will then produce a series of steps.
Having now particularly described, and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
.The employment of two chucks c and d set at an angle the one to the other each
carrying one or more than one circular rotating cutter and constructed and geared
in such a manner that a cutter of the one chuck shall come into operation
alternately with a cutter of the other chuck so that their joint action shall produce
dressed surfaces in the stone operated on inclined the one to the other forming
either an internal angle or an external angle according to the relative position of
the cutters or the chucks, substantially as described and shown with reference to
the accompanying drawings.