Improvements in Means for Casting Glass Rollers, Glass Bearings,. or other similar Glassware.
Year: 1892

page_text: Date of Application, 11th Apr., 1892
Complete Specification Left, 17th Dec., 1892-Accepted, 21st Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Means for Casting Glass Rollers, Glass Bearings,.
or other similar Glassware.
We DAN RYLANDS, of Shepcote, near Barnsley, in the County of York, Glass
Manufacturer, BENJAMIN STONER, of 1, Hopewell Street, Stairfoot, near Barnsley
aforesaid, Mechanic, and SAMUEL MASON THOMPSON, of Aspley Place, Stairfoot
aforesaid, Mechanic, do hereby declare the nature of this invention to be as
follows:-
Our present invention has for its object the production of glass rollers or bearings,,
or plummer blocks, or pedestals, or insulators, or any similar castings, and to so
produce them that they shall be perfectly smooth on the inner surface.
In carrying out our invention we make use of a mould of iron or similar material
made in two parts consisting of a top and bottom plate. In the top plate into
which the glass is poured we fit a suitable arrangement whereby we can revolve in
any suitable position a circular piece of carbon which is caused to revolve in such a
way as to leave the face of the inside of the plummer block or other casting perfectly
smooth and true. In carrying out our invention any other suitable composition'
besides carbon, such as fine asbestos, or other similar substance may be used.
After the glass has been poured in we hold it in position by means of an iron
holding-down cover. This cover is held on either by hand or in any suitable'
manner. This cover also serves to level the top of the glass.
Where it is intended to cast a roller we fit on the end of the rod carrying the
core a suitable circular top plate for keeping the end of the roller level.
Dated this 9th day of April 1892
.
DAN RYLANDS.
BENJAMIN STONER.
SAMUEL MASON THOMPSON.
COMPLETE SPECIFICATION.
Improvements in Means for Casting Glass Rollers, Glass Bearings,
or other similar Glassware.
We DAN RYLANDS of Shepcote, near Barnsley, in the County of York Glass
Manufacturer, BENJAMIN STONER, of 1 Hopewell Street, Stairfoot, near Barnsley,
aforesaid, Mechanic, and SAMUEL MASON THOMPSON, of Aspley Place, Stairfoot
aforesaid, Mechanic, 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 present invention has for its object the production of glass bearings, or
plummer blocks, or pedestals, or insulators, or any similar castings, and to so prodúce
them that they shall be perfectly smooth on the inner surface..
In carrying out our invention we make use of a mould of iron or similar material
made in two parts consisting of a top and bottom plate. In the top plate into
which the glass is poured we fit a suitable arrangement whereby we can revolve in
any suitable position a circular piece of carbon which is caused to revolve in such a
way as to leave the face of the inside of the plummer block or other casting perfectly
smooth and true.
In carrying out our invention any other suitable composition besides carbon, such
as fine asbestos, or other similar substance may be used.
After the glass has been poured in we hold it in position by means of an iron
го

page_text: holding-down cover. This cover is held on either by hand or in any suitable
manner. This cover also serves to level the top of the glass.
Where it is intended to cast a roller we fit on the end of the rod carrying the
core a suitable circular top plate for keeping the end of the roller level.
In the drawings which accompany this Specification,
Figs. 1 and 2 are sectional elevation of a mould well adapted for the production
of the glass bearing shown by Fig. 6 in elevation and by Fig. 7 in plan view, the.
sectional figures being taken on the dotted line 1, 1, shown by the plan view of the
mould Fig. 5.
Fig. 3 is a front elevation of the mould, and Fig. 4 a side elevation partly in
section of the same.
Fig. 8 is a sectional elevation, Fig. 9 a side elevation and Fig. 10 a plan view of
a mould suitably arranged for the production of the glass insulator or roller
illustrated by Fig. 11.
In Figs. 1 to 5, a is the bottom portion of the mould, on which are mounted the
two bearings bb ca shaft carrying the roller d and free to rotate in the bearings bb;
eee longitudinal strips or strickles of carbon, compressed asbestos, or other suitable
polishing material inserted in the angular recesses formed in the periphery of the
roller; g the upper portion of the mould provided with the operating handles h h;
i the mould cover, and j the mould cavity; k a cavity formed in the lower portion
of the mould containing a mixture in suitable proportions of palm oil and resin, or
palm oil and charcoal or other equivalent polishing mixture, in which mixture the.
roller revolves and in so doing becomes coated with the mixture.
From the different figures it will be seen that the upper surface of the roller d
forms the greater portion of the bottom part of the mould cavity j. On molten
metal being ladled or otherwise charged into the interior of the mould and the
roller d being caused to rotate, the mould cover being also placed in position as
shown, and sufficient pressure by hand or otherwise applied by it to the molten
metal, will result in the revolving carbon or other strickles aided by the polishing
mixture to impart a very high polish to the interior or working surface of the glass
bearing. By reference to Figs. 1, 2 and 3 it will be seen that the working faces of
the strickles project slightly above the diameter of the roller d causing the strickles
alone and not the outer surface of the roller to come into working contact with the
molten metal during this part of the operation.
The desired degree of polish having been attained, the roller is brought to rest
in the position indicated by Fig. 2, when the now cooling metal will gravitate on
to the upper and plain surface of the roller as shown by Fig. 2, and in so doing
the highly polished working face of the bearing will become a true and accurate
face by reason of the still semi-fluid metal resting on and assuming the formation of
the plain portion of the roller, sufficient time having been given for the now
completed bearing to become set and solidified, the mould cover can now be
removed.
The upper portion of the mould and with it the glass bearing being also detached
from the bottom portion by means of the handles hh, the upper portion being now
turned over in position will result in the bearing leaving the mould by reason of the
slight taper given to the outer containing walls of the mould.
In Figs. 8, 9 and 10, a a, are the two halves of a divided mould, the halves being
hinged together and attached to the mould bottom by the fixed stud b; c c are
operating handles; d a locking latch securing the two halves of the mould together
in the usual manner; e the mould cover provided with the handle f, ga
tapered central core supported in position centrally with the interior of the mould
as shown.
Molten metal being charged into the closed mould and the mould cover being
placed in position as shown, pressure is now brought to bear on the mould cover
resulting in the trueing up of the upper surface of the molten metal after the
formation shown by Fig. 8 at h. The metal on cooling will contract and the upper
surface of the insulator or roller will then become a true and level surface. On the

page_text: metal becoming sufficiently cooled and set the tapered central core is slightly with--
drawn to avoid the contracting action of the Dow cooling metal. After the metal
has become finally set, the central core and mould cover are removed, the mould
unlocked and opened, when the now completed insulator can be removed to the
annealing oven. In casting insulators and rollers of large dimensions we prefer to
use a hollow central tapered core, through which a circulation of water or air can
take place thereby sooner chilling the metal around the core and enabling the core
to be more speedily withdrawn. The interior of the body portion of the mould may
be turned to any desired formation allowing of the free opening of the charged
mould, and either end of the insulator or roller may be formed with an annular
recess as shown at i (Fig. 8) or may be formed with indentations or projections as
desired.
Having now particularly described and ascertained the nature of our said inven--
tion, and in what manner the same is to be performed we declare that what we
claim is :-
1. In the manufacture of glass bearings, the combination of the two-part mould g, a,.
with the roller d polishing strickles e ee, the plain portion of the roller d, polishing
mixture reservoir k and hand-operated mould cover i as illustrated and described by
reference to Figs. 1 to 5.
2. In the manufacture of glass rollers or insulators the arrangement of the mould.
in two parts a, a, the hand-operated mould cover e and the core g substantially as.
illustrated and described by reference to Figs. 8 to 10.
Dated this 16th day of December 1892.
DAN RYLANDS.
BENJAMIN STONER.
SAMUEL MASON THOMPSON..
DAN RYLANDS.
BENJAMIN STONER.
SAMUEL MASON THOMPSON..