Improvements in Moulds for Forming Glass Bearings, or Plummer Blocks, or Pedestals, or Insulators.
Year: 1891

page_text: Date of Application, 20th Aug., 1891
Complete Specification Left, 20th June, 1892-Accepted, 20th Aug.,
1892
PROVISIONAL SPECIFICATION.
Improvements in Moulds for Forming Glass Bearings, or Plummer
Blocks, or Pedestals, or Insulators.
We, DAN RYLANDS, Shepcote House Stairfoot, near Barnsley, Yorkshire
Bottle Manufacturer, and BENJAMIN STONER of Stairfoot, aforesaid Engineer do
hereby declare the nature of this invention to be as follows:-
Our invention relates to improvements in moulds for the manufacture of glass
bearings or plummer blocks or pedestals as a substitute for brass bearings for
shafting and other purposes. In carrying out our invention we make a mould
having a bottom plate which carries in its centre two studs there being a slot formed
also in the centre of the mould for carrying a central core or rib of iron or other
suitable metal or material. This centre core or rib is the exact shape we wish the
bearing or plummer block or pedestal to be inside. On each side of the outside of
the bottom plate we hinge two pieces of iron or other suitable metal or material the
inside of which is the exact shape that we wish the outside of the glass bearings or
pedestals to be and there is a cavity between these two pieces thus hinged on and
the centre core which cavity represents the thickness and the shape that the glass
bearing is to be. About the middle of these two parts when they are closed we
form a slot hole or get hole which allows the molten metal to pass into the mould.
We also form a suitable box made of iron or other metal or material which box is
arranged to hold the proper quantity of metal for forming the glass bearing we wish
to manufacture and the molten glass is poured into this box when the box is brought
under the plunger and the plunger being brought down either by hand power or by
hydraulic power or in any other suitable manner the molten glass is forced into the
interior of the mould and thus a glass bearing is produced. In some cases it may be
desirable to blow a little cold air through the centre core.
In forming a hollow circular glass bearing or an electrical insulator or bush we
use the smaller top portions to those already described but the core instead of being
fastened on pins and working in a slot is completely withdrawn after the glass has
been pressed. The core slides in a bush of suitable length which is fixed on the
plate carrying the mould and we arrange for a supply of cold water or cold air to
be circulated through this core it being made hollow for the purpose. At the end
where the core impinges on the metal forming part of the mould we arrange a hole
centrally for blowing cold air into the cylinder or bush so as to prevent it collapsing
or going out of shape while the metal is cooling or settling.
Dated this 19th day of August. 1891
DAN RYLANDS.
BENJAMIN STONER.
COMPLETE SPECIFICATION.
Improvements in Moulds for Forming Glass Bearings, or Plummer
Blocks, or Pedestals, or Insulators.
We DAN RYLANDS, Shepcote House, Stairfoot, near Barnsley, Yorkshire
Bottle Manufacturer and BENJAMIN STONER of Stairfoot, aforesaid Engineer, 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:-
This invention relates to improvements in moulds for forming glass bearings,
5 plummer blocks, or pedestals for shafting and other purposes, and also to improve-
ments in moulds for forming electrical insulators.

page_text: In the acco
Fig. 1, is an end view or elevation of a closed mould, plunger box, and pressing
plunger, suitable for the production of the glass bearing shown by end view Fig. 5,
part sectional elevation Fig. 7, and plan view Fig. 6.
Fig. 2 is an end view of the mould showing one portion or side of the mould
open, and
Fig. 3 a sectional elevation taken on the dotted line 1, 1, shown by plan view
Fig. 4.
Fig. 8 is a sectional elevation of a mould and pressing plunger suitably formed
for the making of the glass bearing shown in elevation by Fig. 10.
Fig. 9 is a plan view of the mould, and
Fig. 11 an elevation partly in section showing the glass bearing mounted in a
carriage or pedestal and Fig. 12 is a plan view of the same.
Figs. 13 and 14 are end and side elevations.
Fig. 15 a sectional elevation, and Fig. 16 a plan view of a mould showing the
application of our invention to the manufacture of the glass insulator illustrated
by Fig. 17.
Fig. 18 is a plan view and Fig. 19 an elevation of the mould in the open position.
Fig. 20 is a front elevation and Fig. 21 a sectional elevation of a mould designed
for the manufacture of the glass insulator shown in elevation and plan view by
Fig. 22 and 23,
Fig. 24 being a plan view of the mould.
In Figs. 1, 2, 3, and 4, a is the bottom portion of a mould in which are secured
two studs b, b, c a depression or channel formed in the bottom portion a, da central
core the outer diameter of which is formed to the contour of the interior portion of
the glass bearing it is desired to make; e, e, are the two side portions of the mould
hinged to the mould bottom as shown. The interior surfaces of the side portions
are formed to the configuration of the outer surface of the desired glass bearing;
ff, are locking levers holding the two side portions of the mould securely together
during the pressing operation; g the plunger box and the pressing plunger. In
making a glass bearing by the above described apparatus we proceed in the following
manner.
The mould being closed and the plunger box g, held securely down on the upper
surface of mould by means of the usual clawed holding-down arrangement,
molten metal is ladled or otherwise charged into the interior cavity of the plunger
box. The plunger being caused to descend by hand lever, hydraulic cylinder, or
other suitable means, will cause the molten metal to be displaced from the plunger
box through the "get" hole i, into the interior cavity j of the mould, which cavity
it will be seen is formed by the space between the central core d and the inner
surfaces of the side portions of the mould.
The plunger continuing its descent will cause the metal to completely fill the
interior cavity of the mould with metal and thus complete the formation of the
glass bearing. The plunger and plunger box now ascending leave the mould free
to be moved away from under the plunger box when the locking levers f, f, can be
unlocked and the two side portions of the mould opened.
The central core and with it the finished glass bearing can now be lifted away
from the bottom portion of mould by means of detachable socketted handles
engaging with the projections or snugs 1,1, carried by the central core.
After the
bearing has had time to cool and set, it can be separated from the central core by
turning the core upside down, when the finished bearing can be removed to the
annealing oven. The central core can now be replaced in position on the bottom
portion of mould, the studs b, b, and channel c serving as a ready means for guiding
the core into its proper place. This having been found and the mould closed the
previously described series of operations can be repeated.
In Figs. 8 and 9, a is the bottom and the body portion of mould, c a core
secured to the body portion by the set screws d d. The outer surface of the core e
is turned or otherwise formed to the exact size and form of the internal diameter of

page_text: he desired glass bearing; f is the pressing plunger g the operating handle, and
steady pins carried by the bottom plate a.
A sufficient quantity of molten metal having been charged into the cavity of the
open topped mould 6 the pressing plunger is by hand placed in the position shown
by Fig. 8, and sufficient pressure brought to bear on the molten glass, causing it to
entirely fill the mould. The plunger being now withdrawn from the mould and the
body portion of mould being by the handles g' removed from the bottom portion a
and turned upside down will cause the finished glass bearing to leave the mould by
reason of the amount of taper given to the inner containing walls of the mould.
In Figs. 11 and 12 is a pedestal the top and bottom portions of which are
secured together in the ordinary manner by the bolts j, j; kk, the quarter sections
constituting the glass bearing, la packing of wood, sulphur or other suitable packing
material placed, as shown, between the outer surface of the glass bearing and the
enclosing inner surface of the iron pedestal, firmly holding and supporting the glass
bearing in position.
Figs. 13, 14, 15 and 16 show a mould intended for the production of the glass
insulator illustrated by Fig. 17. a, a, are the two side portions of mould hinged
together at b, and provided with the usual handles, c, and locking lever d: e the
lid of the mould hinged to the side portion a; 1, a locking lever securely holding
the lid e in close contact with the side portions of mould a. a.
Fig. 15 shows in sectional elevation the inner formation of mould.
The side portions and lid of the mould being closed and locked together by the
locking levers as shown, molten metal is charged through the aperture g into the
interior of the mould.
A pressing core or plunger / being now by any convenient means caused to
descend will displace the molten metal from the bottom of the mould and cause it
to ascend and fill the space between the interior surface of mould and the exterior
surface of the pressing core. It being difficult to charge the mould with the precise
quantity of metal required we prefer to charge rather more metal than required, the
over-plus remaining as a thin crust around the bottom of the pressing core as
shown by Fig. 15. The formation of the glass insulator being now completed the
mould can be opened into the position shown by Fig. 18, the insulator removed and
the portion forming the over plus removed.
Figs. 20, 21, and 24 illustrate a mould designed for the manufacture of the glass.
insulator shown by Figs. 22 and 23. a is a bottom plate to which the two side
portions of mould, b, are hinged and secured by fixed stud e; d d handles for
operating the mould, and e the locking lever; /, a T headed stud carried by the
bottom plate and serving to hold the side portions in close contact with the
bottom plate; and g a slide constituting the bottom of the mould.
The method of forming an insulator with this mould is similar in all respects to the
method before explained in reference to Figs. 13 to 16; but after the insulator has
been formed and before the mould is opened the slide is withdrawn from the
position shown by the figures; the pressing core again being depressed will sever
the over-plus of metal from the insulator and thus complete its formation.
Having now particularly described and ascertained the nature of our said
it vention and in what manner the same is to be performed we declare that what
we claim is:-
1. The combination of parts in the apparatus for forming glass bearings, plummer
blocks, pedestals, or similar glass castings as described and shown at Figs. 1 to 12.
2. The combination of apparatus for the manufacture of glass insulators or
similar glassware as described and shown by Figs. 13 to 24.
T
1000
DAN RYLANDS.
BENJAMIN STONER.