An Improved Grinding or Roughing Mill for Glass Bevelling.
Year: 1891

page_text: Date of Application, 10th Dec., 1891
Complete Specification Left, 31st Aug., 1892-Accepted. 1st Oct., 1892
PROVISIONAL SPECIFICATION.
An Improved Grinding or Roughing Mill for Glass Bevelling.
WILLIAM OLIVER BAILEY a member of the firm of Messieurs J. and
W. O. Bailey Glass Merchants and Silverers and Bevellers of the Excelsior Works
Wenlock Road City Road in the County of London hereby declares the nature
of this invention to be as follows:-
:-
The manufacture of the "mill" (that is the "mill" as distinguished from the
machinery which imparts the motive power to it and to which it is attached by a
spindle) in separate and distinct parts (each one however of such parts attachable
to the other of such parts so as to form a compact whole) such parts being as
follows vizt. —
1. A permanent lower plate or disc attachable to the machinery imparting the
motive power as above mentioned.
2. A removable upper or grinding rim attachable to the permanent lower plate
or disc by means of flanges and screws.
3. A wooden backing or inner rim to the upper or grinding rim attachable in
sections without nails or screws.
Dated this 10th December 1891.
SMITH & RYDER,
52, Lincoln's Inn Fields, W.C.
COMPLETE SPECIFICATION.
An Improved Grinding or Roughing Mill for Glass Bevelling.
WILLIAM OLIVER BAILEY a member of the firm of Messieurs. J. and
W. O. Bailey Glass Merchants and Silverers and Bevellers of the Excelsior Works
Wenlock Road City Road 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 nature of the invention may be conveniently described in three parts vizt. :-
The first part of the invention consists of a circular plate or disc of iron or
other suitable hard metal drilled in the centre so as to fit on spindles such as are
now in general use in mills for glass bevelling.
At a convenient distance from the centre of the plate or disc (according to the
diameter of the plate or disc) there is raised upon the plate or disc a rim of
sufficient height to retain in place the backing mentioned below.
Between the outer edge of this rim and the outer edge of the plate or disc the
plate or disc contains a number of holes or slots (preferably six or eight) after the
manner of a wheel leaving the outer rim of the plate or disc connected with
the inner rim (before mentioned) and the centre part of the plate or disc by flat
spokes separating the holes or slots from one another.
These spokes may be strengthened on the under side of the permanent plate or
disc by bearers cast in the iron.
The plate or disc above described forms a permanent part of the machinery to
which the mill is attached.
The second part of the invention relates to the circular upper or grinding rim
upon the surface of which the glass is bevelled. This is a solid removable rim
which nearly corresponds in its external diameters with the outer rim of the
permanent plate or disc herein before described to which its lower surface is attached
Dal

page_text: by suitable fastenings which may be in the form of flanges and screws but I prefer
to use bolts and nuts as follows:-
Upon the lower surface of the upper or grinding rim are cast several bosses
upon which the upper or grinding rim stands upon the permanent plate
or disc.
These bosses are fitted with projecting bolts or screws which pass through
corresponding holes in the permanent plate or disc and are then fastened with nuts
on the underside of the permanent plate or disc.
When the nuts are taken off the upper or grinding rim can be easily removed
from the permanent plate or disc by lifting it off.
The third part of the invention consists of the backing to the upper or grinding
rim and the method of fixing the same.
As before mentioned the permanent plate or disc is fashioned after the manner
of a wheel with flat spokes connecting the outer rim of the plate or disc with the
inuer rim and the centre part thereof.
The backing consists of an inner rim of wood (preferably willow or poplar)
fitting inside the upper or grinding rim hereinbefore described.
When fixed in position it forms a solid backing to the upper or grinding rim and
fills up the holes or slots in the permanent plate or disc.
The backing is put in in sections with the grain of the wood on end two sections
being preferably placed in each hole or slot in the plate or disc. The sections are
grooved on the underside where necessary so as to admit the flat spokes herein-
before described.
The sections are kept in position first by the flat spokes above referred to
secondly by the raised rim on the permanent plate or disc hereinbefore described
and thirdly by the inner side of the upper or grinding rim."
When necessary the sections can be further fixed by wooden wedges driven from
the upper surface.
Among the advantages possessed by my invention aforesaid are the following
namely (1) The use of a permanent plate or disc which is separate and distinct
from the other portions of the mill effects a considerable economy in material as in
the old mills the plate or disc formed an integral part of the mill and when the
grinding surface of the mill had worn away so far that the mill became useless
for further work the whole had to be discarded. (2) The upper or grinding rim
being distinct and separate from the permanent plate or disc can be easily removed
for the purpose either (a) of having its grinding surface turned level when worn
uneven by the friction with the glass (the necessity for removing the entire mill for
this purpose being thus avoided) or (b) of being discarded altogether when worn
down to such an extent that it has become useless again such upper or grinding
rim can be easily re-attached by securing it in position as before mentioned.
3. The use of backing fitted in sections kept in place as before mentioned allows
the upper or grinding rim to wear down lower and more evenly without becoming
useless and saves expense in refacing.
The drawings annexed hereto illustrate my invention.
Figure 1 is a plan and Figure 2 a transverse section.
A. A. represent the circular plate or disc.
B. B. B. represent holes drilled therein for the purpose of attaching it to the
spindle C.
D. D. D. represent the raised rim on the circular plate or disc.
E. E. E. represent the wooden backing.
F. F. F. represent holes or slots in the circular plate or disc for retaining the
wooden backing.
G. G. G. represent the spokes.
H. H. H. represent the grinding rim.
I. represents one of the bosses on the grinding rim.
K. represents one of the screws.
T

page_text: 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
1. The construction of an improved grinding or roughing mill for bevelling
glass as described.
2. The use in a grinding or roughing mill of a detachable and renewable
grinding surface as described.
3. The use in a grinding or roughing mill of a wooden backing arranged and
fixed as described.
W. O. BAILEY.