Improvements in Machines for Bevelling Glass
Year: 1899

page_text: Improvements in Machines for Bevelling Glass,
We, JOHN HORATIO LOVELL and JOHN WILLIAM KING, trading as Robinson
King & Co,. Manufacturers, of 79 and 81, Leonard Street, Finsbury, in the
County of London, do hereby declare the nature of this invention to be as
follows:-
-
The improvements herein described are applicable to the machines used for
bevelling glass, that is to say for any of the operations of "grinding," "smooth-
ing," or polishing," but will be found particularly advantageous for the
operation of "smoothing."
"
The
A machine embodying this invention has a travelling frame for carrying the
sheet or plate of glass to be operated upon and which rests on a table mounted
on the travelling frame. The frame may be moved to-and-fro by any suitable
meana. The table placed upon it is mounted on screw-spindles so that it is
adjustable in height, both at its front or forward edge, and at the rear.
said screw spindles are adjusted either directly by hand, or by hand-wheels or
the like. The table is also fitted with clamps of suitable construction to hold
the glass. At the rear edge of the table are provided blocks against the face of
which the edge of the glass is placed. In order to enable the table to take sheets
or plates of various sizes, the said blocks and clamps may also be made adjust-
able in position. In order further to secure the glass and to cause it to bear
against the stone or the like, by which it is to be operated upon, with a suitable
pressure, a bracket is mounted on any suitable support. This bracket carries
a weighted lever the lower portion of which is fitted with a suitable pad or the
like which bears upon the glass and presses it against the stone or the like. The
weight on the lever is movable so that the pressure may be varied by shifting
said weight, or entirely taken off. In fact when the weight is placed behind
the fulcrum of the lever, the latter is raised clear of the glass. The pad may
be in the form of a wheel or roller bearing on the glass, or a padded lath may be
placed on the glass and a roller on the lever travel on it.
The stone or the like which is to act on the glass is made with an inclined
cutting edge as is usual. It as mounted on an inclined spindle and in such
position that the edge will touch the glass in a particular manner that we will
now proceed to indicate.
The stone, buff or the like for use in glass bevelling machines usually las a
bevelled edge which cuts or polishes the glass. The upper, working, surface
of this edge is generally not parallell with the body of the stone say, but in-
clined thereto so that the whole appears as if a truncated cone were set upon a
cylindrical disc, the cone being at the top materially smaller in internal
diameter than the disc. The usual practice is so to present the cutting edge to
the glass, that the cylindrical part of the stone is parallell, or substantially so,
to the glass, and that the glass passess partly over the depression or hollow
central part of the stone. It has also been proposed to place the stone or the

page_text: like obliquely to the glass, but still the glass has passed over a part of the de-
pressed or hollow central portion. Now according to this invention the stone,
buff or the like, is presented to the glass in such a manner, that the edge of
the stone and that to be cut on the glass, are both horizontal, and moreover,
the glass is not permitted to pass over the stone or tlie like further than would
cause its edge to form a tangent to the hollow or depressed part of the stone:
By placing the parts in this position we avoid the drag that usually occurs in
these machines, that is to say the tendency of the stone or the like to pull tho
glass off the table on which it rests. On the contrary, when the parts are
arranged as stated, the thrust of the stone or the like will tend to force the glass
against the blocks at the rear edge and this greatly facilitates satisfactory
operation of the.machine.
The stone or the like is caused to revolve in such direction that the thrust
may be towards the table, as will be readily understood. Any suitable gearing
may be used to impart motion thereto, say belting or toothed gear, but in most
cases friction gearing is most satisfactory.
BERNHARD DUKES,
226, High Holborn, London, W.C.,
Agent for the Applicants.
Improvements in machines for sa
We, JOHN HORATIO LOVELL and JOHN WILLIAM KING, trading as Robinson
King & Co., of 97 and 81, Leonard Street, Finsbury, in the County of London,
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 improvements herein described are applicable to the machines used for
"smooth-
bevelling glass, that is to say for any of the operations of "grinding
ing" or "polishing," but will be found' particularly advantageous for the opera-
tion of "smoothing."
"
The accompanying drawings show a machine constructed according to this
invention, Figures 1 and being elevations (at right angles to one another)
and Figure 3 a plan-view.
A machine embodying this invention has a travelling frame A for carrying
the sheet or plate of glass B, to be operated upon and which rests on a table
mounted on the travelling frame. The frame may be moved to and fro by any
suitable means. The table placed upon it is mounted on screw-spindles C so
that it is adjustable in height, both at its front or forward edge, and at the
rear. The said screw spindles are adjusted either directly by hand, or by hand
wheels or the like. The table is also fitted with clamps D of suitable con-
struction to hold the glass. At the rear edge of the table are provided blocks E..
against the face of which the edge of the glass is placed. In order to enable the
table to take sheets or plates of various sizes the said blocks and clamps may also
be made adjustable in position. In order further to secure the glass, and to
cause it to bear against the stone or the like, by which it is to be operated upon,
with a suitable pressure, a bracket F is mounted on any suitable support. This
bracket carries a weighted lever the lower part of which is fitted with a suit-
able pad or the like G which bears upon the glass and presses it against the
stone or the like. The weight on the lever is movable so that the pressure may

page_text: be varied by shifting said weight, or entirely taken off. In fact when the weight
is placed behind the fulcrum of the lever, the latter is raised clear of the glass.
The pad may be in the form of a wheel or roller bearing on the glass as shown.
or a padded lath may be placed on the glass and a roller on the lever travel on it.
The stone or the like which is to act on the glass is made with an inclined
cutting edge as is usual. It is mounted on an inclined spindle I and in such
position that the edge will touch the glass in a particular manner, that we
will now proceed to indicate.
The stone, buff, or the like H for use in glass bevelling machines usually
has a bevelled edge h which cuts or polishes the glass. The upper, working
surface of this edge is generally not parallel with the body of the stone say,
but inclined' thereto, so that the whole appears as if a truncated cone were set
up on a cylindrical disc, the cone being at the top materially smaller in internal
diameter than the disc. The usual practice is so to present the cutting edge to
the glass that the cylindrical part of the stone is parallel, or substantially so, to
the glass, and that the glass passes partly over the depression or hollow central
part of the stone. It has also been proposed to place the stone or the like
obliquely to the glass, but still the glass has passed over a part of the depressed
or hollow central portion. Now according to this invention the stone, buff, or
the like, is prosented to the glass in such manner that the edge of the stone
and that to be cut on the glass are both horizontal, and moreover the glass,
slightly inclined from the horizontal, is not permitted to pass over the stone or
the like further than would cause its edge to form a tangent to the hollow or
depressed part of the stone. By placing the parts in this position we avoid the
drag that usually occurs in these machines, that is to say the tendency of the
stone or the like to pull the glass off the table on which it rests. On the con-
trary, when the parts are arranged as stated, the thrust of the stone or the like
will tend to force the glass against the blocks at the rear edge, and this greatly
facilitates satisfactory operation of the machine.
The stone or the like is caused to revolve in such direction that the thrust
may be towards the table, as will be readily understood. Any suitable gearing
may be used to impart motion thereto, say belting or toothed gear, but in most
cases friction gearing is most satisfactory.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
-
À machine for use in bevelling glass arranged so as to present the edge of
the stone or the like to the glass in the manner hereinabove described, said
machine being constructed and operating as set forth and shown in the drawings.
Dated this fith day of Anril 1900.
BERNHARD DUKES,
226, High Holborn, London, W.C.,
Agent for the Applicant