Improvements in or relating to Means or Apparatus for Bevelling Glass, also applicable for other Grinding, Cutting, and Polishing purposes.
Year: 1898

page_text: Improvements in or relating to Means or Apparatus for Bevelling
Glass, also applicable for other Grinding, Cutting, and Polishing
purposes.
I, WILLIAM OLIVER BAILEY, of the Excelsior Works, Wenlock Road, City
Road, in the County of London, Glass Merchant, Silverer and Beveller, do
hereby declare the nature of my said invention to be as follows:-
My invention relates to improved means or apparatus to be used for bevelling
glass, and for grinding, cutting, and polishing purposes generally, and consists in
providing improved materials for use with such means combined with an efficient
means for feeding the grinding or polishing material or powder, and an improved
method of constructing the mill or means for grinding, cutting or polishing.
According to my invention, I make use of lead or other soft metal or alloy
and cast or otherwise mould the same to approximately, the desired shape of the
cutting face or edge. Preferably the lead or soft metal is cast in the form of a
ring and attached to the mill face by bolts sunk within the surface or by other
suitable means. After the ring is attached to the mill, the acting face or edge
is trued to the exact shape required.
The mill is formed in two or more parts preferably two, viz. a mill face and a
flanged boss. The former carries the lead iron stone, or other ring and the latter
is fixed to the shaft, both parts being strengthened and stiffened at the back by
webs and a concentric flange which latter also serves to locate the position of the
two parts. The boss is cut with an internal screw thread for half of its length,
the other half being bored to a sufficiently large diameter to slide over the screw
thread on the shaft. The shaft is cut with right and left handed threads, the
boss being screwed on to the left handed portion and a lock nut on the right
handed portion, or vice versa according to the direction in which the mill is to
revolve.
By this improved method of construction the mill can be readily cast and
bolted together, thereby reducing the cost and weight of the mill and enabling
the mill to be readily set up, and adjusted to take up wear.
For feeding the grinding or polishing material or the like, I provide a cylinder
fitted with a hopper and a shaft carrying a number of beaters or blades. These
are so arranged that on the shaft being rotated the grinding or polishing powder
in solution is driven towards one end of the cylinder, at which a number of small
holes or a perforated nozzle are or is provided. At this end of the cylinder a
rotary brush is arranged so that it receives a continual charge of the grinding or
polishing medium and spreads the same in an even layer on the acting surface

page_text: or edge of the mill. The hopper is, in some cases, provided with means for
regulating the supply of the dry powder to the cylinder, such, for instance, as
a semi-circular tray arranged below the hopper and capable of being rotated to
discharge its contents into the mixing cylinder. Also in order to prevent clog-
ging of the holes or perforated nozzle I provide a tapper, so arranged relatively
to the cylinder that the latter is repeatedly struck by the hammer of the tapper
causing vibrations which loosen or detach the grit from the holes. Similarly the
vibrations may be utilized to give a regular feed from the hopper.
In order to prevent access of grit to the gland, I form an annular chamber in
the stuffing box between the packing and the cylinder, the wall of the chamber
nearest the cylinder being formed with a fine edge. This chamber is filled with
water, air, or other fluid kept under a normal pressure sufficient to balance the
pressure or force with which the grinding or polishing material or grit is being
driven by the rotary beaters against this end of the cylinder.
The grinding, cutting, or polishing material consists of sand, emery, rouge, or
other suitable material in water or other fluid. With lead rings emery is pre-
ferably employed, the degree of fineness being according to the work to be
operated upon and according to the purpose of the operation, the emery becom-
ing embedded in the surface of the soft metal ring thus forming the grinding,
cutting, or polishing face or edge.
The articles or materials to be operated upon may be carried by a travelling
frame similarly to that described in my former Letters Patent No. 11382 of 1894.
For this purpose I provide a suitable bed plate or easel, also means for adjusting
the articles or materials to the desired angle, and provide means whereby the
articles or materials may be securely clamped in position and prevented from
shifting away from the mill when being operated upon.
Dated 9th February 1898.
GEORGE DOWNING & SONS,
8, Quality Court, London, W.C., Agents.
Improvements in or relating to Means or Apparatus for Bevelling
Glass, also applicable for other Grinding, Cutting, and Polishing
purposes.
I, WILLIAM OLIVER BAILEY, of the Excelsior Works, Wenlock Road, City
Road, in the County of London, Glass Merchant, Silverer and Beveller, do
hereby declare the nature of my said invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the fol-
lowing statement:-
My invention relates to improved means or apparatus to be used for bevelling
glass, and for grinding, cutting, and polishing purposes generally, and consists in
providing improved materials for use with such means combined with efficient
means for feeding the grinding or polishing material or powder (hereinafter
referred to as "medium"), and an improved method of constructing the mill or
means for grinding, cutting, or polishing.
And in order that my said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawings in which
similar letters of reference indicate corresponding parts,

page_text: Fig. 1 is a diagrammatical face view of the apparatus as arranged for face
grinding, cutting or polishing.
Fig. 2 is a side view, partly in section, of the cylindrical mixer of the feeding
apparatus.
Fig. 3 is an enlarged end elevation of the feeding apparatus fitted with means
for detaching the medium as hereinafter described.
Fig. 4 is a part side view of Fig. 3.
Fig. 5 is an elevation showing the mill adapted for edge grinding, cutting, or
polishing.
Fig. 6 is a horizontal section illustrating my improved method of constructing
the mill.
Figs. 7, 8 and 9 are respectively sections and plan view illustrating methods of
regulating the feed of the medium to the mixer.
Fig. 10 is a section of one end of the mixer illustrating my improved packing,
also means for detaching the medium from the holes.
According to my invention, I make use of lead or other soft metal or alloy
and cast or otherwise mould the same, approximately to the desired shape of the
cutting face or edge.
Preferably the lead or soft metal or alloy is cast in the form of a ring and
attached to the mill face by bolts sunk within the surface or by other suitable
means. After the ring is attached to the mill, the acting face or edge is trued
to the exact shape required. In Fig. 1 the ring b is on the face of the mill a,
and in Fig. 5 the ring is on the edge or periphery of the mill.
The mill (Fig. 6) is formed in two or more parts, (preferably two) viz., a
mill face a and a flanged boss a³. The former carries the lead, iron, stone, or
other ring b and the latter is fixed to the shaft z, both parts being strengthened
and stiffened at the back by webs a6 and a concentric flange a', which latter
also serves to locate the correct position of the two parts. The boss a³ is cut
with an internal screw thread for half of its length, as shown, the other half
being bored to a sufficiently large diameter to slide over the screw thread on the
shaft. The shaft is formed with right and left handed threads; the boss is
screwed on to the left handed portion and a lock nut z¹ on the right handed
portion, or vice versa, according to the direction in which the mill is to revolve.
By this improved method of construction the mill, especially those of larger
dimensions, can be readily cast and bolted together, thereby reducing the cost
and weight of the mill and enabling the mill to be readily set up and adjusted
to take up wear.
For feeding the grinding or polishing medium, I provide a cylindrical mixer c
(Figs. 1, 2 and 3) fitted with a hopper and a shaft c¹ carrying beaters or
blades ; the shaft is rotated, whereby the medium in solution is driven towards
the end in which a number of small holes (Fig. 3) are formed or a per-
forated nozzle may be employed instead. At this end of the cylinder a rotary
brush dis arranged, as shown in Figs. 1, 3, 4 and 5, so that it receives a con-
tinual charge of the medium and spreads the same in an even layer on the
acting surface or edge 6 of the mill a.
or
The hopper of the mixer c is, in some cases, provided with means for regu-
lating the supply of the medium to the mixer; three forms or devices are illus-
trated in Figs. 7, 8, and 9. In Fig. 7 a drum is used, formed with semicircular
grooves or trays f, which drum is rotated intermittently (either by hand
power) whereby a definite quantity of the medium may be fed to the mixer c.
The hopper is immediately above the drum and is preferably provided with a
perforated pipe g through which water, oil or other fluid issues, thus separating
the medium from the sides of the hopper and ensuring the trays being properly
charged at each half revolution of the drum.
In Figs. 8 and 9 the hopper f is provided with a pair of grids h, h¹, the former
being fixed and the latter capable of longitudinal motion. The grid h¹ is reci-

page_text: procated by hand or power so that a
the slots of the grids to the mixer c.
or grids, the opening into the mixer
sions.
certain quantity of medium is fed through
The pipe g may be used without the druin
from the hopper being of suitable dimen-
The water or other fluid is preferably introduced into the mixer at the front
end c³, as shown at which arrangement also tends to keep the holes clear. An
overflow spout or pipe may also be fitted to the mixer.
In order to prevent clogging of the holes or nozzle o of the mixer c, I provide
a tapper, see Figs. 3 and 4. This consists of a lever e pivoted at de, to the end
of the mixer o, one end of the lever carrying a hammer e³ and spring et and
the other end 6 being operated by a pin fitted to the rotary brush d,d',
whereby the end 3 of the mixer c is repeatedly struck by the hammer causing
vibrations which loosen or detach the medium from the holes. Similarly the
vibrations may be utilised to ensure a regular feed from the hopper. Inside the
mixer I sometimes mount a brush i (Fig. 10) on the axle or shaft c', so arranged
that the holes ct, which are preferably slightly conical, are brushed clean from
the inside.
In Fig. 10 is illustrated my improved method of preventing access of grit or
medium to the gland. I form an annular chamber k in the stuffing box of
the mixer c, the wall of the chamber nearest the mixer being formed with a
fine edge k¹. This chamber is filled with water, air, or other fluid kept under a
pressure sufficient to balance (and when utilised also as a fluid feed, sufficient
to overcome) the pressure or force of the propelled or driven fluid medium within
the mixer. For this purpose and when water is used the chamber k is con-
nected with a tank at a sufficient height to maintain a steady head of water;
other means may.be employed if desired.
The grinding, cutting or polishing material consists of sand, emery, rouge, or
other suitable material in water or other fluid. With lead and other metal rings
emery is preferably employed, the degree of fineness being according to the
work to be operated upon and according to the purpose or object of the opera-
tion; the emery becomes embedded in the surface of the soft metal ring and
forms the acting face or edge.
The articles or materials to be operated upon may be carried by a travelling
frame similarly to that described in my former Letters Patent No. 11382 of 1894.
For this purpose I provide a suitable bedplate or easel, also means for adjusting
the articles or materials to the desired angle, and provide means whereby the
articles or materials may be securely clamped in position and prevented from
shifting away from the mill when being operated upon.
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. In means or apparatus for bevelling glass, also for other grinding, cutting,
and polishing purposes, the combination of a mill having a lead or other soft
metal or alloy ring, a rotary disc brush which is in contact with the ring and
also with the end of the mixer which is perforated, and a mixer, constructed as
described, for mixing and ejecting the medium in solution on to said disc brush,
substantially as herein before described and illustrated by Figs. 1 to 5 of the
drawings.
2. The improved construction of mill, substantially as described and illustrated
by Fig. 6 of the drawings.
3. The combination, with a mixer constructed as described, of the means for
regulating the supply of medium to the mixer, substantially as herein before
described and illustrated by Figs. 7, 8 and 9 of the drawings."
4. The combination with a mixer containing the medium in solution of the
means for preventing the grit gaining access to the packing gland, substantially
as hereinbefore described and illustrated by Fig. 10 of the drawings.

page_text: 5. The combination with a mixer constructed as described of a brush fixed to
the shaft for cleaning the holes and detaching therefrom and preventing accumu-
lation of grit thereon, substantially as hereinbefore described and illustrated by
Fig. 10 of the drawings.
ם.
1000
GEORGE DOWNING & SONS,
8, Quality Court, London, W.C., Agents.