Ovens for Drying, Burning, Baking, and similar Operations.
Year: 1889

page_text: Ovens for Drying, Burning, Baking, and similar Operations.
We, JOHANN CHRISTIAN FELLNER, and CARL ZIEGLER, both of Bockenheim
Frankfort on the Maine Germany, Engineers, 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:
The employment of travelling platforms beds, or trucks in kilns or ovens for drying,
burning baking, and the like, is subject to various difficulties, the principal one of
which relates to the proper lubrication of the wheels of such platforms, as the
lubricating material is evaporated or burnt at the high temperatures to which it is
subjected and requires to be almost continuously renewed, in addition to which, the
vapours of the lubricant may act injuriously upon the objects or materials that are
subjected to heat on the platforms &c.
Furthermore the separate sections of the platforms, or the trucks are frequently
made to strike heavily against each other, and are consequently subject to considerable
wear, and the necessary employment of buffing apparatus between the sections involves
a considerable loss of available space for drying or heating purposes.
Our invention has for its object to obviate these difficulties, and it consists mainly
in constructing such travelling platforms or trucks in such a manner that there is
substituted for the friction of axles in bearings, the rolling friction of rollers, while at
the same time all striking together of the separate sections is avoided and the use of
buffing apparatus is reduced to a minimum.
With this arrangement care has however to be taken that the distance between the
rollers is always maintained constant, as should they move too far apart, the platformu
sections resting upon them might fall through between them, while if they come so
close together as to be in contact, the friction produced would impede the motion.
The parallelism of the axes of the rollers must also be inaintained, as should they
assume an angular position, the direction of motion of the platform-section resting on
them would be changed, whereas it is necessary that all the platform sections shall
only travel in a prescribed direction.

page_text: The rollers may either be formed into an endless chain, or they may be removed
separately with the sections of the platform at one end or part of the kiln or oven, and
be introduced at the other end or at another point.
In the latter case the speed of the forward motion of the rollers should be as small
as possible, in order that the periodical removal and reintroduction thereof from and
into the kiln may not require to take place too often.
The accompanying drawings shew the arrangements we prefer to employ for
carrying our invention into practice.
Fig. 1 shews a longitudinal section of a drying kiln or flue, with the improved
construction of travelling platform carried by rollers arranged as an endless chain.
Fig. 2 shews a similar longitudinal section, with the rollers arranged to be removed
at one end of the kiln and reintroduced at the other end. Fig. 3 shews a cross
section, and Fig. 4 shews a plan of the roller gear. Fig. 5 shews a part longitudinal
section. Fig. 6 a cross section and Fig. 7 a plan of an arrangement in which there
are two sets of rollers, those on which the platform sections rest being of larger
diameter than those that run on the floor of the kiln.
The rollers, as shewn at Figs. 1 to 4, are formed of pairs of flanged discs or
wheels R connected together by an axle A, while the separate sections of the
platform B have on their underside rails S corresponding in position to the gauge of
the flanged wheels or discs R, by means of which they rest on the latter, and thus
prevent any shifting of the platform and rollers relatively to each other. The
rollers R run on rails S' fixed on the ground, which insure that they, and also the
platform shall run exactly in the required direction.
In order to insure that the forward motion of the rollers shall be as small as possible
relatively to that of the platform sections, so as to prevent the taking out of the rollers
at one end and the putting in at the other end from having to be effected too
frequently, they may be provided with a second set of discs or wheels R¹ of smaller
diameter, as shewn at Figs. 5 to 7 which discs or wheels run on rails S2, while the
discs or wheels R only support the platform.
Thus while during one revolution of the rollers, the wheels R¹ advance on the
rails S2 a distance equal to the developed periphery thereof, the wheels R, in revolving
with R, will cause the platform to advance a distance equal to the developed
periphery of R, plus the distance which the wheels R' have advanced, so that by a
due proportioning of the diameters of R and R¹ the advance of the platforin may be
made to bear any desired proportion to that of the rollers.
For insuring that the distance apart of the rollers shall always remain the same,
their axes are connected by coupling links K or K¹.
These are made very light and of equal length; they may either be made in
lengths, capable of being uncoupled, as at Figs. 2 to 7, or they may be made to
constitute a continuous chain as at Fig. 1.
With this description of motion, no section of the platform can move independently
of the others; on the other hand it is desirable to effect the removal and introduction
'of the sections from and to the kiln Cindependently of each other. In order to
enable this to be done, there are provided at both ends of the kiln a series of fixed
rollers Q, to and from which the platform sections are transferred from and to the
rollers Ŕ when they arrive at the corresponding points. For this purpose the
rollers R are made, at the outlet end, to pass down on to a lowered part S³ of the rails,
so as to pass away clear of the platform section on the rollers Q, and in like manner
at the charging end, the rollers are made to pass up from a lower part S* of the rails
on to the part S' in order to receive the platform section from the rollers Q.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The improved construction of travelling platform, bed, or trucks for kilns or
ovens for drying, burning, baking, and similar purposes, wherein the platform, bed,
or trucks is or are carried on the peripheries of flanged rollers running on rails, the

page_text: flanges of such rollers being made both to confine the direction in which the platform,
bed, or truck-body runs upon them, and the direction in which the rollers themselves
run upon the rails, substantially as herein described.
2. In travelling platforms, beds or truck-bodies carried on flanged rollers, such as
are referred to in the preceding claim, the use of rollers consisting of two sets of
flanged wheels or discs of different diameters, fixed on one and the same axle, the one
set being made to run on the railway, while the other set supports the platform bed or
truck-body, whereby the forward travel of the rollers may be made to bear any
desired proportion to that of the platform, bed or truck-body, substantially as herein
described.
-
3. In travelling platforms, beds or trucks carried on flanged rollers, such as are
referred to in the preceding claims, connecting the axes of the rollers by links which
may either be made to form an endless chain, or be made detachable, in order to
maintain the rollers at a constant distance from each other, substantially as herein
described.
4. In combination with travelling platforms, beds or trucks carried on flanged
rollers, such as are referred to in the preceding claims, the use of fixed rollers at
the end or ends of the kiln or oven, in combination with sunk portions S³ S₁ of the
rails on which the rollers run, for facilitating the introduction and removal of the
platform or bed sections or truck bodies into and from the kiln or oven, substantially
as herein described.
1
CA
11000
ABEL & IMRAY,
Agents for the Applicants.