A NEW OR IMPROVED FIRE GRATE FOR STEAM BOILER AND OTHER FURNACES
Year: 1884

page_text: COMPLETE SPECIFICATION.
I HUGO PATAKY, Civil Engineer and Patent Solicitor in Berlin S.W.
Hedemannstr. 2 do hereby declare the nature of said Invention for "A NEW OR
IMPROVED FIRE GRATE FOR STEAM BOILER AND OTHER FURNACES and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
The improvement consists in the special form and arrangement of the grate
which in the Drawings is shown in connection with a tubular boiler with fire place
in centre a is a common grate which is continued by the slanting grate R composed
of the bars i the end part of which d again lies horizontally.
The grates a and Ŕ have between them a common fire bar bearer r. At c
the grate R forms a knee and rests with its upper end d on the curved fire bar
bearer e.
The upper end of the grate obtains thereby a curved, form as shown in
Figs. 3 and 4. As one fire bar bearer is horizontal and the other e curved the
bars will be of unequal length and some will form a sharper knee at c than others
viz. the center bar will be the shortest and least bent while the two outer ones
will be the longest and most bent.
If the bars are required to be all the same length the bearer e must be given a
round form as shown in Fig. 6 and this forward curve will counteract the effect of
the downward curve and render all bars equally long.
Fig. 7 shows a form of the curved fire bar bearer e with step formed rests for
the bars.
The slanting grate may also be given a flat form by using a straight instead of
the curved fire bar bearer e in which case the bars are all of the same length the
knee at c is however retained and also ends in a horizontal part.
The knee grate may also be divided at c the parts R and d resting on a common
bearer which when using the curved form must have the same steplike rests
as the bearer e in Fig. 7 and when the bars are of equal, length must be bent like e
in Fig. 6.
The fire bridge f rests on the bearer e which at its lower part has a valve g
through which ashes &c. may be removed from the chamber which may be made
of stone or metal and is closed by the wall t.

page_text: The slanting of the grate towards the fire bridge and the contraction of the fire
box has the effect that the products of combustion coming from the grate a on
which the fresh fuel is thrown must necessarily sweep over the glowing fire on
part d of the grate R and be fully ignited.
The curved form of the grate causes a thicker mass of fire to collect in the centre
than at the sides where the air necessary for combustion will have a thinner layer
of coal to pass through.
✓
This form and position of fire grate is applicable for other boilers and furnaces
besides tubular, and in some cases from a to z Fig. 1 may be covered by a fire brick
roof low enough to force the unconsumed gases to move close over the glowing fire
at the back part of the grate.
Having now particularly described and ascertained the nature of my said
Invention and in what manner, the same is to be performed I declare that what
I claim is
1 A grate for heating purposes of any description and for steam boilers; of
which the front pait is horizontally arranged the middle part inclining
either straight or curved the end part of the grate again horizontally laid
out in shape either straight or curved up.
2nd The arrangement of the above described grate within the flues of steam
boilers as well as in connection with a fire clay arch for fire places of any
description.
11004
HUGO PATAKY.
LORENTZ ALBERT GROTH.