Improvements in Machinery for Rolling Glass.
Year: 1890

page_text: Date of Application, 15th Jan., 1890
Complete Specification Left, 30th Sept., 1890-Accepted, 8th Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Rolling Glass.
We CHANCE BROTHERS AND Cc. LIMITED of West Smethwick in the County of
Stafford Glass Manufacturers and EDWARD FERGUSON CHANCE of West Smethwick
aforesaid Managing Director of the said Company do hereby declare the nature of
this invention to be as follows:-
The said invention consists of improvements in or additions to machinery for rolling
glass for which Letters Patent were granted to Frederick Mason and John Conqueror
dated the 3rd of October 1884 No. 13119.
The invention patented by Messrs. Mason and Conqueror consists essentially of a
pair of rolls between which molten glass running down an inclined plate passes and
is thereby rolled into a sheet which sheet is received on another inclined plate from
which it passes to the annealing kiln. The said Letters Patent granted to the said
Messrs. Mason and Conqueror is the property of Chance Brothers and Co. Limited.
Our said invention consists of the combination with the said patented invention of
an additional pair of rolls by which the sheet of glass formed by the first pair of rolls
is further operated upon and improved and where desirable impressed with a pattern
on one side by one of the rolls of the said pair of rolls.
In carrying the said invention into effect we employ a pair of rolls preferably of
smaller diameter than the first pair of rolls by which the sheet of glass is originally
formed. We will call the original pair of rolls by which the sheet of glass is formed
the primary rolls and we will call the second pair of rolls the secondary rolls. The
axes of the secondary rolls are horizontal but are not situated vertically one above the
other the plane in which the said axes are situated being approximately at right angles
to the plane of the inclined plate down which the sheet of glass from the primary
rolls descends. In this arrangement the second inclined plate which receives the sheet
of glass after leaving the primary rolls is divided into two parts the secondary rolls
intervening. The said secondary rolls are geared together so as to rotate in opposite
directions with the same speed. We give the said secondary rolls by preference a
slight "lead" that is we make them rotate with a surface velocity slightly greater
than that of the primary rolls. By the said "lead" the said secondary rolls are made
to remove any "buckling" or irregularity of figure which the sheet of glass still
plastic may have acquired after leaving the primary rolls. Such "lead" must be
increased or diminished with any substantial increase or diminution of the distance
between the secondary rolls. If it is desired to impress any design on one side of
the sheet of glass it may be done by one of the secondary rolls. That is, the primary
rolls must in machinery made according to our invention both be cylindrical and
without any pattern or design on either of them.
In order to be able to exercise complete control over the action of the secondary
rolls we support the bearings of one or both of them preferably those of the upper
roll upon a lever. By the application of a weight or by pressure otherwise applied
we can determine with the greatest nicety the extent to which the secondary rolls
operate on the sheet of glass formed by the primary rolls. The maximum effect
which it is desired the secondary rolls shall have on the sheet of glass may be
determined by an adjustable screw stop or stops which can be adjusted so as to limit
the distance to which the lever referred to can descend with the greatest nicety. In
impressing a design we prefer to raise the upper secondary roll while the first end of
the sheet of glass which is too much chilled to properly receive the impression is
passing through in order to avoid the wear upon the imprinted roll. The sheet of

page_text: glass after leaving the secondary rolls is conveyed to the annealing kiln in the
usual way.
Dated this Fifteenth day of January 1890.
W. T. WHITEMAN,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Machinery for Rolling Glass.
We CHANCE BROTHERS AND CO. LIMITED of West Smethwick in the County of
Stafford Glass Manufacturers and EDWARD FERGUSON CHANCE Managing Director
of the said Company do hereby declare the nature of the said invention and the manner
in which the same is to be performed to be particularly described and ascertained in
and by the following statement :-
The said invention consists of improvements in or additions to machinery for rolling
glass for which Letters Patent were granted to Frederick Mason and John Conqueror
dated the 3rd October 1884 No. 13119.
The invention patented by Messrs. Mason and Conqueror consists essentially of a
pair of rolls between which molten glass running down an inclined plate passes and
is thereby rolled into a sheet which sheet is received on another inclined plate from
which it passes to the annealing kiln. The said Letters Paient granted to
the said Messrs. Mason and Conqueror are the property of Chance Brothers & Co.
. Limited.
Our said invention consists of the combination with the said patented invention of
an additional pair of rolls by which the sheet of glass formed by the first pair of
rolls is further operated upon and improved and where desirable impressed
with a pattern on one or both sides by one or both of the said additional pair
of rolls.
In carrying the said invention into effect we employ a pair of rolls preferably of
smaller diameter than the first pair of rolls by which the sheet of glass is originally
formed. We will call the original pair of rolls by which the sheet of glass is formed
the primary rolls and we will call the second pair of rolls the secondary rolls. The
axes of the secondary rolls are horizontal but are not situated vertically one above
the other the plane in which the said axes are situated being approximately at right
angles to the plane of the inclined plate down which the sheet of glass from the
primary rolls descends. In this arrangement the second inclined plate which receives
the sheet of glass after leaving the primary rolls is divided into two parts the secondary
rolls intervening.
وو
The said secondary rolls are geared together so as to rotate in opposite directions
with the same speed. We give the said secondary rolls by preference a slight "lead"
that is, we make them rotate with a surface velocity slightly greater than that of the
primary rolls. By the said "lead" the said secondary rolls are made to remove any
"buckling" or irregularity of figure which the sheet of glass still plastic may have
acquired after leaving the primary rolls. Such "lead must be increased or
diminished with any substantial increase or diminution of the distance between the
two pairs of rolls. If it' is desired to impress any design on one or both sides of the
sheet of glass it may be done by one or both of the secondary rolls. In order to be
able to exercise complete control over the action of the secondary rolls we support the
bearings of one or both of them, preferably those of the upper roll, upon a lever. By
the application of a weight or by pressure otherwise applied we can determine with
the greatest nicety the extent to which the secondary rolls operate on the sheet of
glass formed by the primary rolls. The maximum effect which it is desired the
secondary rolls shall have on the sheet of glass may be determined by an adjustable
screw stop or stops which can be adjusted so as to limit the distance to which the
lever referred to can descend with the greatest nicety.
In impressing a design we prefer to raise the upper secondary roll while the first

page_text: end of the sheet of glass (which is too much chilled to properly receive the
impression) is passing through in order to avoid the wear upon the imprinted roll.
The sheet of glass after leaving the secondary rolls is conveyed to the annealing
kiln in the usual way.
We will now proceed to describe with reference to the accompanying drawings the
manner in which the said invention is to be performed.
Figure 1 represents in vertical section (partly in side elevation) and Figure 2 in
plan (partly in horizontal section) machinery for rolling glass containing the improve-
ments constituting the said invention. The top roll of the primary pair of rolls is
removed in Figure 2.
Figure 3 represents a side elevation of a portion of the machinery.
In Figures 1 and 2 the inclined plate down which the molten glass runs to the
primary pair of rolls is omitted.
The same letters of reference indicate the same parts in the several figures of the
drawings.
a,
C,
d are the
b are the primary rolls by which the sheet of glass is formed and
secondary rolls by which the sheet of glass formed by the primary rolls is further
operated upon and improved and if required impressed with a pattern on one or both
sides of the sheet; e is the inclined plate which receives the shoot of glass from the
primary rolls and conducts it to the secondary rolls and e² is the inclined plate which
receives the sheet of glass from the secondary rolls.
The position of the lower inclined plate e² is adjusted by means of the hand
levers ff.
The axes of the secondary rolls are horizontal but it will be seen that they are not
situated vertically one above the other but the upper roll is somewhat in advance of
the lower roll, the plane of the axes of the secondary rolls being situated approximately
at right angles to the plane of the inclined plate e down which the sheet of glass from
the primary rolls descends. It will also be seen by an examination of Figure 1 that
the secondary rolls c, d are situated between the two inclined plates e and e². The
secondary rolls c d may either he plain rolls or a pattern or design may be engraved
or otherwise made upon the surface of one or both rolls. In the latter case the sheet
of glass operated upon by the secondary rolls will be impressed on one or both sides
of it with the pattern or design on one or both rolls.
"
The said secondary rolls are geared together and driven in the manner hereinafter
described from the primary rolls the secondary pair of rolls rotating in opposite
directions with the same speed. It is preferred that the secondary rolls c d shall have
a slight "lead
or be made to rotate with a surface velocity slightly greater than that
of the primary rolls for the purpose of removing any "buckling" or irregularity of
figure which the sheet of glass, still plastic, may have acquired after leaving the
primary rolls.
The sheet of glass first operated upon by the primary pair of rolls a, b is received
on the upper inclined plate e down which it passes to the secondary pair of rolls c,
and further operated upon and if required impressed by the said rolls, if the roll or
rolls has or have been provided with a pattern or design as before described. The
plain or ornamented sheet of glass after leaving the secondary rolls is received on the
lower inclined plate e and from thence conveyed to the annealing kiln.
The bearings of the upper roll c of the secondary pair of rolls d are supported
in the levers 9 g turning on the centres g² 9² and operated by the handles g³, g³. The
distance to which the upper roll c can descend and approach the lower roll d is
regulated by the adjustable screw stops h, h carried by the said levers g, g bearing on
the frame of the machine (see Figures 1 and 3). The said levers 9, 9 may be pressed
down by weights or springs so that the extent to which the secondary rolls operate on
the sheet of glass formed by the primary rolls can be determined, the maximum effect
of the secondary rolls on the sheet of glass being determined by the adjustable
stops h, h. The use of the supporting levers g, g of the upper roll c also permits the
said upper roll of the secondary pair of rolls being raised from the lower roll when
required. This is desirable when impressing a design on the glass as the first end

page_text: of the sheet of glass is too much chilled to properly receive the impression in
passing through the rolls and hence injurious wear upon the impressing roll is
. avoided.
The primary rolls and secondary rolls are driven by the following gearing, i is
the driving shaft carrying the large toothed wheel which gears with the toothed
wheel on the horizontal shaft m parallel with the shaft of the bottom roll b of the
primary rolls. The opposite end of the shaft m carries the pinion n which gears
with the pinion p on the axis of the lower roll b. The pinion p gears with a similar
pinion shown in dotted lines in Figure 1 on the axis of the upper roll a.
The
secondary rolls c d are driven from the lower roll 6 of the primary rolls by the
following gearing. Between the lower rolls b and d of the primary and secondary
pairs is an axis carrying an intermediate toothed wheel r which gears with the
pinion p on the lower roll b. The axis of the intermediate toothed wheel carries a
second toothed wheels (see Figure 1) which gears with the toothed wheel t on the
axis of the lower roll d of the secondary pair of rolls and the two rolls c, d are
geared together by the pinions and w.
Having now particularly described and ascertained the nature of the said inven-
tion and the manner in which the same is to be performed we declare that
we claim as the said invention of:-"Improvements in machinery for rolling
glass":
-
The combination with a pair of primary rolls of a pair of secondary rolls by
which the sheet of glass formed by the first pair of rolls is further operated upon
and impressed when required with a pattern or design on one or both sides by one
or both of the said secondary rolls the several parts being constructed and combined
and acting substantially as hereinbefore described and illustrated in the accompanying
drawings.
Dated the 29th day of September 1900.
For CHANCE BROTHERS AND CO., LIMITED,
GEORGE F. CHANCE, Director.