Improvements in or connected with Furnace Grates.
Year: 1898

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with Furnace Grates.
I, MAX HECKING, of Dortmund, in the Empire of Germany, 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 relates to a means for automatically rocking or pushing forwards
and backwards the coals on flat grates of furnaces for the purpose of gradually
assisting the combustion and removing the clinkers or ashes.
The arrangement consists mainly of a feed hopper F arranged in front of the
furnace and a grate R. It is shown in the accompanying drawings, Figure 1 being
a side view of the arrangement, and Figures 2 & 3 end and front views of the
grate bars showing the means of suspension.
The feed hopper F has a flap k pivoting on a point s and as wide as the entire
fire, and also an opening for allowing the coal to fall on to the grate.
even
The latter consists of a number of grate bars arranged not as usual at right
angles to the furnace door, but parallel to the latter, the cross section of said bars
being preferably wedge-shaped as shown, or they may be rectangular if desired..
The grate may be horizontal, or as usual slightly inclined. The grate bars are
suspended by means of projecting pins or lugs z, Figure 2, on both sides in notches
forined in the walls r r of the furnace so that an oscillating movement is possible.
Lower pins or lugs z¹ are also formed on the grate bars to lie in suitable openings
in a common drawbar Z of which there may be two that is to say one on each side.
A rotary shaft W with crank or eccentric, links and levers effects an
oscillating movement of the valve or flap k and simultaneously a rocket movement
of the grate bars. On each pushing forward of the flap k a certain amount of coal,
which
may
be easily regulated according to the extent of the movement, is
conveyed from the feed hopper on to the grate. The lower or under edges of the
pins or lugs z are formed as knife edges as a support for the bars, Figure 2, these
knife edges being formed to one side as shown and not in the vertical middle line
of the bars. The consequence is that on the oscillation of the bars into the position
shown in dotted lines, (Fig. 2) each bar is. tilted and has part of its upper surface
raised as shown, and this action taking place over the whole grate, produces an
even movement forward of the whole of the coals and their residues.
This pushing forward has for its object a gradual initiation of the combustion
of the coals. The smoke and gases mainly evolved in proximity to the feed place
are carried away over the part of the coal which is in an entire state of combustion
and are thus consumed so that a smokeless combustion is attained.
The unconsumed residues such as clinkers, ashes and the like are pushed or
shaken over the ends of the grate, falling into the ashpit A and may be removed
by means of the door T.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is :-
In furnace grates the application and use of grate bars lying parallel with the
f-onaning coid hana haingamananded in the Intout:

page_text: a way that the points of support lie to one side of the vertical centre line and in
this manner swing in such a way that a forward movement of the coals and their
residues towards the ashpit is produced, in combination with a feed mechanism
composed of a swinging flap and the mechanism for operating the same, substan-
tially as hereinbefore described.
St February 1898.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.