Improvements in Glass Cooling or Annealing Ovens.
Year: 1897

page_text: Date of Application, 11th May, 1897-Accepted. 12th June, 1897
COMPLETE SPECIFICATION.
Improvements in Glass Cooling or Annealing Ovens.
We, GUSTAV TASCHE of 66, Landwehrstrasse, Munich and FLORIAN SPORer
of 28, Schweinemarktstrasse, Cham both in the Empire of Germany, Manufacturer
and Machinist respectively, 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 has for its object a glass cooling or annealing oven for antique and
hollow glass ware.
In the cooling or annealing ovens hitherto employed, it was necessary to commence
the heating about 10 to 12 hours before the commencement of the work in order that
the oven should be of a suitable temperature. This necessitated a considerable
consumption of fuel, especially as the fire must be maintained during the entire
period of working.
This drawback is removed by the device hereinafter described, which device has
also for its object to prevent breakages of the cylinders contained in the cooling.
oven, which cylinders were mostly stored loosely in the same whereby they were
easily caused to roll. This prevention of breakages is effected by the glass cylinders
being placed in cylinder carriers conveyed by means of a suitable device from th
warm into the cold passage of the oven.
In the accompanying drawings,
Figure 1 is a longitudinal section of a cooling or annealing oven;
Figure 2, a horizontal section of the same;
Figures 3 and 3B are views of a box for holding glass ware.
The cooling or annealing oven consists of a long masonry passage A, which is
divided into two compartments by means of a partition B arranged at about half the
height of the oven so that the latter is divided into so called warm and cold passages.
At the side of the passage A is arranged a furnace by means of which the upper,
that is to say the warm passage, is heated. In place of this furnace C a masonry
chamber may also be formed into which all the gases flowing from the glass house,
such, for instance, as those from the melting furnaces, may be conveyed and
utilised for heating the passage, or employed for heating the fuel contained in the
oven. At the opposite end of this upper passage is a discharge passage or pipe
which is in communication with a chimney. This upper passage is at its end so
shut off by this chimney that the warm gases and also the cold from the lower
passage cannot penetrate into the opposite passage. On the opposite side of the
passage there is a valve or damper D for shutting off the warm passage from the
cold one,
which valve is suspended by means of a hinge and opens and closes
automatically according to the draft in the separate passages. On the front side
of the oven are two openings a and b which may be closed by means of suitable
doors. The upper opening a leads to the warm passage, and the glass cylinders
which are to be cooled or annealed are inserted through this opening, the antique
cylinders which have been finished as far as the cooling being placed in the
carriers c intended for them, which may run on a track by means of rollers d.
The said track, as may be seen in Figure 1, runs through both the warm and the
cold passages. The supports or carriers e are arranged so far apart that they do not
come in contact with one another and are connected with one another by means of

page_text: links or rods e which are flexibly fixed on the spindles of the rollers on the carriers..
A connection of the various cylinder carriers c is thus established which may be
further moved by the following arrangement :-
On a shaft mounted in the upper passage is keyed a toothed segment arranged
outside the cooling furnace to engage a second larger toothed segment which is keyed
on a shaft mounted beneath the partition B. On the same shaft f are keyed two
levers g which are provided at their ends with small levers attached by means of
hinges. Drawbars connect these levers g with two corresponding levers at the
other end of the furnace. The latter levers are also mounted like the levers g on a
shaft and also carry small levers. on. their ends, which like the levers / project
between the rails on which the carriers run. On the shaft of the small toothed
segment a crank m is fixed which may be operated from the outside and must
always execute an oscillating movement in order that the levers g and i may be swung
out of the position in Figure 1: to the right, whilst the cylinder carriers situated in
front of these small levers hand in the cold passage are shifted or moved in the
direction of the arrow. By this means however, as there always exists a connection;
between the carriers in the two passages, those in the warm passage are caused to
make a movement from the right to the left, that is to say in the direction of the
arrow. The hinged levers and are so arranged that when they execute a
movement opposite to the direction of the arrow, they cannot push back the cylinder
carriers. The antique glass cylinders are placed into a cylinder carrier through the
opening a and forwarded by means of the crank m, shaft and levers g and i which
are oscillated, whereby the carriers are moved forward progressively so that they all
come in succession in front of the opening a and are there filled, the glass cylinders
being then conveyed through the warın passage, gradually reaching the cold passage
and finally, coming in front of the opening b. Here the glass cylinders which by this
time are cooled are removed from the carriers, and thus simultaneously with the
insertion of a glass cylinder in the passage a cooled glass cylinder can be withdrawn
therefrom.
In the case of hollow glass-ware instead of the carriers, movable sheet metal boxes
for receiving the glass-ware may be employed, Figures 3ª and 3B.
As by means of these cooling or annealing ovens it is possible to utilize for heating
purposes all the gases from the glass house, these ovens may be maintained at: a
constantly even temperature and only require to be heated at the most for from three
quarters of an hour to one hour before the commencement of working. A very
considerable sum in fuel is thus saved over the cooling ovens at present employed.
By the even cooling down of the glass a considerable toughness is imparted to it
and it consequently breaks less easily. There is thus a considerable saving effected by-
the use of these cooling or annealing ovens.
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. A cooling or annealing oven for antique and hollow glass-ware, characterized by
the same being heated by means of a fireplace or by the waste gases from the glass
house and provided with a warm passage formed by a horizontal partition in the
masonry oven, which warm passage is shut off from the cold passage at one end by
means of a discharge chimney and at the other end by means of a movable flap or
valve, whilst the glass cylinders are conveyed by means of a suitable device from the
warm to the cold passage, substantially as described.
2. A cooling or annealing oven such as described, in which the glass cylinders to
be cooled are placed in cylinder carriers in the warm passage, which carriers are
connected one with another and travel on rollers, the movement of the said
carriers being caused by means of a lever device operated by means of a
crank, so that after each glass cylinder has been passed through the warm and
then through the cold passage it may be removed finished from the latter, substantially
as described.

page_text: 3. The general construction and combination of parts taken as a whole, forming
the improved glass cooling or annealing oven, substantially as hereinbefore described
and illustrated.
Dated this 10th day of Mo.. 1907
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Agents for the Applicants.