An Improvement in Producing Chamfers upon Stone.
Year: 1890

page_text: Date of Application, 28th Nov., 1890
Complete Specification Left, 13th Apr., 1891-Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
An Improvement in Producing Chamfers upon Stone.
We, JOHN LOUIS DALOT and JOSEPH DALOT both of Addison in the County
of Washington and State of Maine United States of America, Granite Manu-
facturers, do hereby declare the nature of this invention to be as follows:-
Our invention relates to an improved method of producing chamfers or bevels
upon stone; and has for its object to provide a means whereby a number of slabs
or blocks may be treated in one operation and a decided economy in time labor and
material be obtained.
In carrying out the invention, any desired number of slabs or blocks of stone are
placed face to face in an inclined position, the angle of the inclination being mainly
determined by a head or gauge block having a bevelled face against which one of
the blocks or slabs rests. The lower edges of the stones rest upon any convenient
support in such manner that the opposite upper diagonal edges are in horizontal
alignment. In determining the angle of inclination any adjustable plumb level
may be employed. When the desired number of stones have been properly set,
they are boxed in at their sides and ends and the spaces formed between the edge
of the one stone and the face of the adjacent stone is filled in with plaster of paris
or equivalent material until the entire upper surface of the grouped stones is
levelled. The tops of the stones are operated upon by means of any desired
form of polishing or grinding machine, until the proper chamfer or bevel has been
obtained. The degree of inclination of the chamfers depends upon the degree of
inclination of the stones and any suitable gauge may be employed by the workman
to ascertain from time to time the width of the chamfer.
The boxing serves to retain the stones in proper position and the filling of plaster
of paris prevents waste of polishing or grinding material, any variety of which
may be used, as in the absence of the filling a quantity of the said grinding
material would escape through the crevices between the slabs.
If the grinding or polishing machine operates properly, when one chamfer is
completed all of them will be finished. It is obvious that by the above method a
decided economy is obtained over the old system, which consists in cutting the
chamfers by means of a chisel upon each stone and separately rubbing down and
polishing the chamfered surfaces.
Dated this 28th day of November 1900
J. L. DALOT.
J. DALOT.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
An Improvement in Producing Chamfers upon Stone.
We, JOHN LOUIS DALOT, and JOSEPH DALOT, both of Addison, in the County
of Washington,. and State of Maine, United States of America, Granite Manu-
facturers, 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:-
Our invention relates to an improved method of producing chamfers or bevels
upon stone; and has for its object to provide a means whereby a number of slabs
or blocks may be treated in one operation and a decided economy in time, labor, and
material, be obtained.

page_text: The invention consists in the novel steps of the method, as will be hereinafter
fully set forth and pointed out in the claims.
Reference is to be had to the accompanying drawings, forming part of this
Specification in which
;
Figure 1 is a vertical section through a series of slabs in position.
Figure 2 is a partial front elevation of a chamfered slab.
Figure 3 is a vertical section through the same.
Similar figures of reference indicate corresponding parts in all the views.
In carrying out the invention, any desired number of slabs or blocks of stone 10
are placed face to face in an inclined position, the angle of the inclination being
mainly determined by a head or gauge block 11 one side face of which is bevelled
as shewn at 12 in Figure 1, one of the blocks or slabs being made to rest upon the
said bevelled face. The lower edges of the stones rest upon the ground or other
convenient support, in such manner that the opposite upper diagonal edges are in
horizontal alignment. In determining the angle of inclination any adjustable
plumb level may be employed. When the desired number of stones have been
properly set, they are boxed in at their sides and ends, and plaster of paris or
equivalent material is placed in the upper cavities 12ª until the entire upper surface
of the grouped stones is levelled. The tops of the stones are operated upon, by
means of any desired form of polishing or grinding machine, until the proper
chamfer or bevel has been obtained. The degree of inclination of the chamfers
depends upon the degree of inclination of the stones, and any suitable gauge may
be employed by the workman to ascertain, from time to time, the width of the
chamfer.
The boxing serves to retain the stones in proper position and the filling of
plaster of paris prevents waste of polishing or grinding material, any variety of
which may be used, as, in the absence of the filling, a quantity of the said
grinding material would escape through the crevices between the slabs. If the
grinding or polishing machine operates properly, when one chamfer is completed
all of them will be finished. It is obvious that, by the above method, a decided
economy is obtained over the old system, which consists in cutting the chamfers by
means of a chisel upon each stone and separately rubbing down and polishing the
chamfered surfaces.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is―
1. The herein described method of chamfering stones, which consists in placing
a number of stones at any desired inclination, filling the upper cavities of the stones
with a cement, as plaster of paris, and rubbing the upper covered surfaces of the
stones simultaneously in the same horizontal plane, as and for the purpose specified.
2. The herein described method of chamfering stones, which consists in placing
a number of stones at an inclination, boxing the said stones, leaving the tops
exposed, building up the top surfaces of the grouped stones to a common level, and
rubbing the said levelled surfaces simultaneously in the same horizontal plane,
substantially as, and for the purpose, set forth.
Dated this 13th day of April 1891