, and other like Minerals.
Year: 1885

page_text: Marble, and other like Minerals.
I, JAMES COULTER, of Bankfoot Foundry, Batley, Yorkshire, Engineer do hereby
declare the nature of my invention for "IMPROVEMENTS IN MACHINERY FOR
DRESSING OR PLANEING STONE, MARBLE, OR OTHER LIKE MINERALS," to be as
follows:-
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This invention has reference to prior Letters Patent granted to me and to
Herbert Harpin bearing date the 1st of April 1872 N° 959.
The invention referred to consisted in the employment of standards at each side
of the machine carrying a cross head. This cross head carried one, two, or more
tool boxes employed to dress or plane the stone, such tool boxes being capable of
moving laterally by means of screws, so arranged that when the tools had passed
over one part of the stone, they would be moved to another part so as to operate
upon the whole surface of the stone.
The first part of my invention consists in a new means or method of carrying
the tools, and in moving the said tools over the surface of the stone.
To carry out my invention I dispense with the tool boxes, and instead thereof
I form the cross head with a number of holes or slots in which I place the
operating tools made secure therein by keys or wedges. The cross head is
supported at each end by suitable brackets in which it is capable of sliding
end wise by means of a lever and rod, worm and wheel, or other suitable mechanism
by which means the cross head can easily be moved laterally when the tools
require to be moved to another part of the stone.
Instead of moving the tools, the stone may be moved to suit position of tools.
To do this I fix the stone to a cross slide attached to the travelling bed, and when
the stone requires moving to present another part thereof to the tools, I move the
cross slide laterally by rack and pinion or other mechanical arrangement.
My invention also relates to means to be employed for turning over the cross
head and tools each time the table carrying the stone gets to the end of its stroke,
so that the stone is operated upon during the backward and forward motion of the
travelling table. For the purpose of carrying out this part of my invention
I connect a chain to one or both sides of the table, the other end of such chain
being connected to an arm projecting from the cross head, so that just before
the travelling table arrives at the end of its stroke, the chain would be tightened
and overturn the cross head, thereby presenting the other side of the cutting edge
of the tools towards the stone for the return stroke.

page_text: Marble, and other like Minerals.
"F
I, JAMES COULTER of Bankfoot Foundry Batley, Yorkshire, Engineer do hereby
declare the nature of my invention for IMPROVEMENTS IN MACHINERY FOR
DRESSING OR PLANEING STONE, MARBLE, AND OTHER LIKE MINERALS" and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention has reference to prior Letters Patent granted to me and to
Herbert Harpin bearing date the 1st day of April 1872 N° 959.
The invention referred to consisted in the employment of standards at each side
of the machine carrying a cross-head.
This cross head carried one, two, or more tool boxes employed to dress or plane
the stone, such tool boxes being capable of moving laterally by means of screws so
arranged that when the tools had passed over one part of the stone, they would be
moved to another part so as to operate upon the whole surface of the stone.
The first part of my present Invention consists in a new means or method of
carrying the tools, and in moving the said tools over the surface of the stone.
Such being the nature and object of my invention I will now proceed to describe
the same more fully and for that purpose make reference to the accompanying
sheets of drawings wherein Fig. 1 is sectional end elevation of certain parts of the
machine having my improvements applied thereto.
A is the travelling bed resting and sliding upon the small rollers B; and C is a
stone fixed to the said travelling bed to be dressed. D is a cross-head or tool
holder corresponding in length to the width of the machine, such tool holder being
made with a number of holes or slots to receive the cutting tools E which are
fastened therein by wedges or other suitable means.
This cross-head is supported at each end by brackets F in which it is capable of
sliding endwise by means of lever G and stud H which is fastened in the end of
the axle I of the cross-head by means of a screwed boss or gland a.
When therefore the stone has passed under the tools and been dressed thereby
and it is necessary to move the position of the tools so as to operate upon the
undressed parts, the lever G is drawn forwards as shewn in dotted lines whereby
the cross-head and tools therein are moved so that on the next movement of the
stone under the tools the remaining parts of the stone will be dressed.
Fig. 2 (sheet 2) is cross section of full sized cross-head shewing interior and the
wedge b for securing tools E in position.
Instead of moving the cross head and tools over the stone as above described
I may move the cross head by hand wheel J (see Fig. 3) and screw K working in
stationary nut L
The screw K is fastened into the end of the axle I by screwed boss or gland a
as previously explained, and by turning the hand wheel J the cross head can be
moved endwise to the position required.
Instead of moving the tools the stone may be moved to suit position of tools.
To do this I fix the stone to a cross slide attached to the travelling bed and when

page_text: the stone requires moving to present another part thereof to the tools I move the
cross slide laterally by rack and pinion, or other mechanical arrangement.
This part of my invention is shewn in Fig. 4 and Fig. 5 (sheet 2) the former of
which is cross section and the latter a longitudinal section. A is the travelling
bed upon which is a cross slide M carrying the stone C.
The cross slide M is provided with a rack N on the underside gearing with a
pinion O on the shaft of which is a hand lever P.
When therefore the cutting tools have dressed one part of the stone I operate
the hand lever P so as to oscillate the pinion O in such manner that the cross
slide is moved laterally so as to present the undressed part of the stone under the
cutting tools.
My invention also relates to means to be employed for turning over the cross
head and tools each time the table carrying the stone gets to the end of its stroke,
so that the stone is operated upon during the backward and forward motion of the
travelling table.
The manner of carrying out this part of my invention is shewn in Fig. 1 where
Qis a chain one end of which is connected to a stud c projecting from the side of
the travelling table A, the other end of such chain being connected to a hook d
projecting from the lever arm R attached to the axle of the cross head all of which
are so arranged as that just before the travelling table A arrives at the end of its
stroke the chain Q would be tightened and overturn or oscillate the cross head D,
thereby presenting the other side of the cutting edge of the tools towards the stone
for acting upon it on the return motion of the table and so on each time the
travelling table arrives at the end of its movement.
In order to alter the length of stroke one or more links in the chain may be
taken up or let out and hanging other links onto hook d.
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;
Firstly. The means and appliances substantially as described and shewn in
Figures 1 and 2 for moving the cutting tools laterally over the stone.
Secondly. The employment of the chain Q and the manner of operating same
for overturning the cross head and cutting tools substantially as set forth.
Dated this 21st dor of March 1886