Improvements in Grate-bars.
Year: 1891

page_text: Date of Application, 19th May, 1891-Accepted, 27th June, 1891
CUMI JEL DI MUIFICATION,
Improvements in Grate-bars.
I, CARL TURNOFSKY of 48 Marienburger Strasse of Berlin, Kingdom of
Prussia, Germany, Merchant, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My invention relates to grate-bars with removable heads and the object thereof
is to give the bar such a shape that will not impede the passage of air or molten
slag. I arrive at this object by aid of corrugated iron arranged in the manner
illustrated on the accompanying drawing and hereinafter more fully described.
The manifold trials to construct grate-bars with removable heads or leaves and
to introduce them into the trade, were by no means successful, because they could
not answer to the manifested wants. These wants were: The heads or leaves were
to sit firmly in their sockets, so as to be unable to jump out or get displaced, and
the webs being furnished with the socket, had to be of sufficient stability against
bending down or bending out without impairing the size of the passage for the air
or molten slag. This last was found to be the greater difficulty and none of the
known designs could boast of completely overcoming the said difficulties. Now
my present invention consists in arranging two equal corrugated irons rivetted
together back to back, thus being adapted to allow the shauk of a head or leaf to
be set into each double corrugation and thereby forming a grate-bar, in which the
free passages not only are unimpaired by the socket, but even have by far wider
spaces, than is the case in the usual cast-iron bars, on which the heads are directly
cast.
The corrugated iron thus forming the web or the beam of the grate-bar may
have any height without hindering the access of air, therefore any desired stability
may be attained. Moreover, they may be made and divided into any length, which
is very important for the sake of exportation, since any length may be put together
out of small pieces from the stores. I may also give the head such a shape, that a
projection of each head rests against the corrugation of the next bar, thus inter-
locking all the bars amongst each other, and rendering the bending out of each
single bar separately impossible, but only permitting of a bending of the complete
set jointly.
The web of each bar is formed of two corrugated irons and rivetted together,
thus firmly clasping the shank of the heads, there the lateral strength is highly
increased. The shanks may be provided with a small lug on each side, fitting into
holes or impressions punched correspondingly into each corrugation of the webs.
Thereby the heads are not only kept unremovable in their place, since they can
neither be pulled out nor twisted, but they will also be easily brought into the
exact position.
Taking all these features into account one must say that the application of
corrugated iron permits of the most favorable arrangement.
In order to make my invention more clear, I refer to the accompanying drawing,
in which similar letters denote similar parts throughout the different views, and in
which:-
Fig. 1 is a plan of a portion of the grate.
Fig. 2 is an elevation of the grate-bar.
Fig. 3 is a cross-section taken through the centre-line of a head.
Fig. 4 is a cross-section taken on a line between two heads.
Figs. 5 & 6 are modifications of the foregoing two figures.
a a are corrugated iron clamping in between their corrugations the shanks of the
heads or leaves r r. The shanks are provided with a small lug on each side

page_text: fitting into corresponding holes or impressions punched into the corrugations
clasping the shanks, thus it will be seen, that the head can be neither turned nor
moved up or down. This latter arrangement of course may also be replaced by
providing the shanks with impressions and pressing corresponding humps into the
corrugated iron.
The increase of stability against bending out sideways heretofore mentioned is
arrived at by giving the lugs such a length, that they project through the holes
of the corrugated iron and touch the corrugations of the next bar, thus no bar can
bend out sideways by itself, being held in position by all the rest.
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. In a grate-bar: The combination of two corrugated portions (aa) rivetted back
to back, forming the web and adapted to clasp the shank of the head (r) cach fitting
in between two corrugations as described and for the purpose set forth.
2. In a grate-bar: The combination of two corrugated portions (a) rivetted
back to back, forming the web and adapted to clasp the shanks of the heads (7), each
fitting in between two corrugations, lugs and corresponding impressions being made
to prevent the heads from slipping out or turning, as set forth.
Dated this titl
exc
1001
CARL TURNOFSKY.
By Robert Deissler,
38, Alexander Strasse, Berlin, C., Germany, Agent for the Applicant