Improved Means of Manufacturing Glass Conduits or Tubes for Electrical or other Purposes.
Year: 1890

page_text: Date of Application 11th Oct., 1890
Complete Specification Left, 11th July, 1891-Accepted. 15th Aug.. 1891
PROVISIONAL SPECIFICATION.
Improved Means of Manufacturing Glass Conduits or Tubes for
Electrical or other Purposes.
I, DAN RYLANDS of Shepcote, Stairfoot near Barnsley in the County of York
Glass Bottle Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My present invention has for its object the manufacture of glass conduits for
electrical or other purposes in such a way that the ordinary copper strip can be
successfully used as well as the round cable, and also so as to provide in the one
glass conduit for any desired number of lines of either flat copper or round cable.
According to my present invention I form an iron mould to open sideways which
iron mould is the shape of the conduit required to be made. This mould can be
fitted with an inner or pressing mould where so preferred and an outer or blowing
mould. then form a plunger having the same number and shape of prongs as it is
wanted to form holes in the said glass conduit and this plunger is so formed that
each prong can be used as a blower to blow the holes through where it is found
desirable so to do but in many cases the prongs of this plunger will have to be as
deep as the holes in the glass are required to be long. After plunging these holes
through the glass 1 withdraw the plunger and blow steadily into the holes until the
glass has set sufficiently for the holes to retain their proper shape, and thus in the
one piece of glass I make two, three, four or any required number of holes of any
required shape. I shape the top and bottom of this mould for making these. glass
conduits either with a screw on one end and a number of slots on the other, so as
thus by means of a screw and claw union to bring them together, or in some cases
they may be made so that the one end of the one conduit can be screwed into the
other end of the other it only being necessary to face the ends with some kind of
preparation that will make it possible to screw the one end into the screw formed in
the end of the other. In some cases the ends of the glass conduits may be held
tightly together by means of clamps. Also I so shape the ends of the glass conduits
that they dovetail into each other in such a way as to bring the holes for the
electrical wire exactly opposite each other.
Dated this 10th day of October 1890.
COMPLETE SPECIFICATION.
Improved Means of Manufacturing Glass Conduits or Tubes for
Electrical or other Purposes.
I DAN RYLANDS of Shepcote, Stairfoot near Barnsley in the County of York
Glass Bottle Manufacturer 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 :-
My present invention has for its object the manufacture of glass conduits for
electrical purposes in such a way that the ordinary copper strip can be successfully
used as well as the round cable, and also so as to provide in the one glass conduit
for any desired number of lines of either flat copper or round cable. According to
my present invention I form an iron mould to open sideways which iron mould is the
shape of the conduit required to be made. This mould can be fitted with an inner
or pressing mould where so preferred and an outer or blowing mould. I then form

page_text: a plunger having the same number and shape of prongs as it is wanted to form holes
in the said glass conduit and this plunger is so formed that each prong can be used
as a blower to blow the holes through where it is found desirable so to do, but in
many cases the prongs of this plunger will have to be as deep as the holes in the
glass are required to be long. After forming these holes through the glass with-
draw the plunger and blow steadily into the holes until the glass has set sufficiently
for the holes to retain their proper shape, and thus in the one piece of glass I make
two, three, four or any required number of holes of any required shape. I shape the
top and bottom of this mould for making these glass conduits either with a screw on
one end and a number of slots on the other so as thus by means of a screw and claw
union to bring them together, or in some cases they may be made so that the one
end of the one conduit can be screwed into the other end of the other it only being
necessary to face the ends with some kind of preparation that will make it possible
to screw the one end into the screw formed in the end of the other. In some cases
the ends of the glass conduits may be held tightly together by means of clamps.
Also I so shape the ends of the glass conduits that they dovetail into each other in
such a way as to bring the holes for the electrical wire exactly opposite each
other.
In order that my invention may be more clearly understood I annex drawings of
which
Fig. is a sectional side elevation of a mould and other apparatus for the
manufacture of glass conduits or tubes after the manner of my said invention.
Figs. 2 and 3 are sectional views taken on the dotted lines ss and shown by
Fig. 1 respectively.
Figs. 4, 5 and 6 are elevations showing different methods of connecting or
coupling up the lengths constituting a line of conduit, and Fig. 7 is a sectional end
view of Fig. 6.
Referring to Figs. 1, 2 and 3, a is a mould made in three parts and hinged
together at bb; c is a plunger guided by the ram d in an up and down direction,
e the plunger box, fare hollow prongs rectangular in section in the figures
shown from to but of circular form from / to i;jj are air ports controlled by
tap and are for the purpose of admitting air under pressure into the interior of the
hollow prongs or cores fff; is a table provided with V guides m m for the
guidance of the mould a in a horizontal plane; nn are feeding gaits communicating
between the plunger box e and the interior of the mould, o a movable mould end
guided by the ramp and formed with a hole for the admittance and guidance of
the outer ends of the prongs fƒ ƒ.
q
The method of forming a conduit or tube by the above described apparatus is as
follows: The plunger e being at its highest position and above the upper surface
of the mould (the mould being closed) the prongs ff and mould end o being in the
position shown, molten metal is now charged into the interior of the rectangular
plunger box e which by screw action or other suitable means is securely held in
contact with the upper surface of mould. The plunger c now descending displaces
the metal from the interior of the plunger box into the interior of the mould through
the feeding gaits n n. The mould being now filled and the prongs fff surrounded
with metal the prongs are simultaneously withdrawn from the interior of the
conduit. Air under pressure being admitted by ports and passages jj into the
interior of the openings formed by the prongs during the time of withdrawal will
cool the glass and enable it to set and retain its proper form till sufficiently cooled
to be removed from the mould. The plunger and plunger box being now elevated
and clear from the upper surface of mould, the mould can now be withdrawn from
under the plunger and plunger box, the mould end o withdrawn and the mould
opened, when the finished product can be removed.
Another method of forming a conduit or pipe in glass consists in employing a
vertical mould in two or more parts and hinged together. The mould is provided
with a balanced movable mould bottom and a mould top perforated with holes for
the entrance and withdrawal of the hollow prongs which are similar in construction

page_text: to those previously described. The required quantity of metal being placed in
the mould, the mould cover is shut and secured, after which the prongs descending
through the holes in the mould cover displace the metal in the mould and cause the
balanced mould bottom to retire before the advancing prongs; this continues till
the mould bottom reaches the bottom of the mould, when the formation of the
conduit is completed.
27
Figs. 4, 5 and 6 show different methods of coupling up a length of conduit.
In Fig. 4 the joint is formed by means of an elastic ring u of rubber or equivalent
material being enclosed between the shoulder » and inner portion of socket w of the
conduite.
In Fig. 5 the joint is formed with an elastic ring or washer u drawn
together by the bolts shown. In Fig. 6 u is a jointing ring compressed in this case
by means of the right and left handed coupling. Fig. 7 shows in section one of
the many forms and combinations of glass conduit or tube that can be made with
the aid of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The manufacture of glass conduits for electrical cables or other similar
purposes in the manner herein described with reference to Figures 1, 2 and 3 of the
drawings annexed.
2. The means of coupling together glass conduits or tubes having any number of
holes therein for electrical flat copper strips or round cables or other similar
purposes as described and illustrated with reference to Figures 4, 5 and 6 of the
drawings hereto attached.
Dated this 10th da
T..1 1001
DAN RYLANDS.