Year: 1886

page_text: I, ABEL DE BOISCHEVALIER representing the Societé anonyme de Courcelles pour
la fabrication des Glaces of Courcelles in the Kingdom of Belgium, Glass Manu-
facturer, do hereby declare the nature of this invention to be as follows:-
The present invention relates to a combination of parts in which the usual
rubbers for polishing mirrors and the like are replaced by rigid dises having a
similar motion; the weight of the discs is supported by the glass, and having
rubbers fixed to the said discs in such a manner that even, when they pass over the
edge of the surface to be polished, they remain constantly in the same plane;
whereas in other polishing machines at present in use the rubbers must not be
allowed to pass beyond the edge of the glass or they will assume an inclined
position, consequently the edges of the glass are never so well polished as the
inner portions.
In carrying the invention into effect I substitute in the apparatuses called
"plate formes" for the plates called "moellons" (or I fix below these "moellons ")
a flat rigid piece perforated or continuous, parallel to the large rotating table and
formed of one or more pieces.
To this surface the polishers are attached instead of being left free as in the
mechanism hitherto in use. When the apparatus is at work the large iron platform
upon which the glass is fastened is rotated by the prime motor whilst two wooden
plates provided on their lower surfaces with iron blades rub upon the glass,
sand and water being interposed, and have also a movement of rotation either
from the rubbing alone or by means of motion imparted to them by a pulley
and driving belt or it may be preferable in certain cases to apply power to these
wooden plates alone and effect the rotation of the large plate by friction only.
To apply the arrangement which forms the object of the present application for
Letters Patent, the two plates are raised by means of two levers to a sufficient
height to enable the two discs to be placed underneath them. These discs are either
ID 837

page_text: in one piece or composed of two or more segments, and are formed of iron rings
connected by half round iron bars to which the polishing pieces are riveted,
instead of having a certain amount of play in a vertical direction as in the appa-
ratuses at present in use. Sufficient play is left between the plates and the discs,
so that they may not touch each other.
Wч P. THOMPSON & Co.,
323, High Holborn, London,
Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Polishing Plate Glass, Marble, and the like,
and Apparatus therefor.
I, ABEL DE BOISCHEVALIER representing the Société Anonyme de Courcelles
pour la Fabrication des Glaces of Courcelles in the Kingdom of Belgium, Glass
Manufacturer 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:-
The present invention relates to a combination of parts in which the usual
rubbers for polishing mirrors and the like are replaced by rigid discs having a
similar motion; the weight of the discs is supported by the glass and having
rubbers fixed to the said discs in such a manner that even when they pass over the
edge of the surface to be polished, they remain constantly in the same plane;
whereas in other polishing machines at present in use, the rubbers must not be
allowed to pass beyond the edge of the glass, or they will assume an inclined
position, consequently the edges of the glass are never so well polished as the
inner portions.
In the annexed drawings is shewn one form of the apparatus by way of example;
the invention can however be carried into effect in various ways without departing
from the principle herein after described.
"
In carrying the invention into effect, I substitute in the apparatuses called
"plateformes" for the plates called "moellons (or I fix below these "moellons ")
a flat rigid piece, perforated or continuous parallel to the large rotating table, and
formed of one or more pieces. To this surface the polishers are attached instead
of being left free, as in the mechanism hitherto in use.
Referring to the accompanying drawings, Figure 1 represents a platform for the
glass of the usual pattern. The large iron platform A. B upon which the glass is
fastened is rotated by the prime motor whilst the two wooden plates provided on

page_text: their lower surfaces a, b, a', b¹ with iron blades which rub upon the glass, sand and
water being interposed, have also a movement of rotation either froin the rubbing
alone, or by means of motion imparted to them by a pulley and driving belt; or
it may be preferable in certain cases to apply power to these wooden plates alone,
and effect the rotation of the large plate by friction only.
To apply the arrangement which forms the object of the present application for
Letters Patent, the two plates are raised by means of two levers h, h¹ to a sufficient
height to enable the two discs, of Figure 2, to be placed underneath them; the
scale of Figure 2 is two and a half times that of Figure 1.
These discs are either in one piece or composed of two or more segments, and
are formed of iron rings connected by half round iron bars, to which the polishing
pieces are riveted instead of having a certain amount of play in a vertical direction,
as in the apparatuses at present in use. Sufficient play is left between the plates
and the discs, so that they may not touch each other.
The screws fixed to the plates are first lowered into the holes c, c¹ of the discs, so
that the stems of the screws being free in a vertical direction only act in propelling;
the apparatus is then caused to revolve.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is;
The use, for polishing under the above described conditions, of rigid discs resting
their weight freely on the surface to be polished, and to which the rubbers are
fastened, so that during their rotary movement they always remain in the same
plane, even if they happen to project beyond the edge of the glass.
DL:
1000