IMPROVEMENTS IN ROCKING BARS FOR ALL KINDS OF FURNACES
Year: 1885

page_text: DAVID JONES (Civil Engineer) Lichfield St Burton on Trent JOSEPH BRUNT
Woollen Merchant 167 High St Burton on Trent do hereby declare the nature of
our invention for IMPROVEMENTS IN ROCKING BARS FOR ALL KINDS OF FURNACES,
to be as follows: —
It consists in the addition of two connecting rods with a crank which is supported
by a transverse bar in or under the center of grate to work or move each bar in
opposite directions and further in shape and construction of bars and rockers which
support the bars at each end thereof and are operated by a hand lever or mechanical
power. By our method all the bars rest on the rockers only, and each end of the
bars reach the edge of a dead plate against the bridge and door, which bars in their
action raise and pass say about one and half inch over the dead plate, each point of
the bars when in position touch or nearly touch both dead plates.
T 11: າດ. 1
DAVID JONES.
JOSEPH BRUNT.

page_text: An Improvement in Rocking Bars for all kinds of Furnaces.
We DAVID JONES Civil Engineer Lichfield Street Burton-on-Trent and JOSEPH
BRUNT Woollen Merchant 167 High Street Burton-on-Trent do hereby declare the
nature of our said invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement :-
Our improvements in rocking bars consists in the addition of two connecting
rods with a crank which is supported by a traverse bar in or under the centre of
grate to work or move each bar in opposite directions and further in shape and
construction of bars and rockers which support the bars at each end thereof and are
operated by a hand lever or mechanical power. By our method all the bars rest
on the rockers only and each end of the bars reach the edge of a dead plate against
the bridge and door, which bars in their action raise and pass say about one and
half inches over the dead plate, Each point of the bars when in position touch or
nearly touch both dead plates.
In order that our invention may be better understood and more easily carried
into practice we have appended hereunto a sheet of drawings upon which we have
illustrated a grate fitted up according to our invention and from which it will be
very easy for practical men to adapt the principle to other varying circumstances
and conditions the drawings here given being illustrative only of the principle.
Figure 1. is a part sectional elevation of a grate showing a bar in position and
one view of the gear used in working the same.
Figure 2. is a broken off plan of the same grate showing a number of bars in
position.
Figure 3. is a part cross section and part end elevation of a similar set of bars
but shown in the flue of a boiler.
Figure 4. is a broken off plan of the mechanism under the bars which is used in
working them, the bars themselves in this case being removed so as to show the
working parts more clearly.
On reference to the drawings A is the bar of which there may be any number to
compose a grate according to the width required and they lie side by side as shown
at Figure 2. the distance apart between each other being set and maintained by
the projections b, 61 and 6 shown in full on one side and the projections 6³, b₁
and 6 shown by dotted lined on the other side so that when they come together
the projections miss each other. They may however be so placed that they are not
under and above each other wbich would allow the bars to be lifted out. There
might also be say two on one side and three on the other or any other number
according to the length and thickness of the bars. Generally bars rest either at
one or both ends upon the dead plate or bridge plate but in my grates the bars
never rest either upon the dead plate D or bridge plate C but just drop between
the two leaving sufficient clearance or space at each end to allow amply for
expansion and contraction and great freedom in working and to assist this object
both ends of the bar are tapered away so that the junction with the dead plate and
bridge plate is practically nothing even if the ends touch and they never do. The
bridge E is built some six inches back upon the bridge plate so that any accumi-
lation of clinkers upon the front of the bridge does no hold to or fasten the bars.

page_text: The bars themselves are supported at the front end upon the rocking lever F
and at the back end upon a similar lever H each of which are hung upon their
respective pivots f¹ and h¹ and each lever is limited in its travel or rocking action
in one direction by the studs h and f. The back lever H is connected to the
frout lever F by the connecting rods J and K both connected at the centre of the
grate to the double lever M which turns upon the centre m¹ carried upon any
suitable support N. The rocking action is produced by the lever P which enters
the hole R in the front rocker F the depression of which brings the bars upwards
as shown by dotted lines in Figure 1. The action in the present instance shown
at Figure 1 would be that the lever F engaging deeply into the hook at at the left
end of the bar would securely hold and retain it and thus as it lifted would slide
the other end forward until the projection a¹ rested upon the rocker at h³ thus
lifting the bar above the surface of the bar on either side of it The bars are
placed alternately with one hook end on F and the next upon H so that each
alternate bar is slided longitudinally in opposite directions and each alternate bar
is lifted higher than its neighbour so that the clinkers are entirely broken up and
have no chance of adhering to the bars and thus anthracite, Welsh and other hot
coals may be used without difficulty-we may of course use mechanical power to
lift the bars if we choose instead of the hand lever but the principle of action
would be just the same in both cases.
The shape we find best at the top of the bar is shown at Figure 5.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
The improvements in rocking bars for the construction of grates which are
supported upon rockers at each end of the grate and are operated by a lever P or
other equivalent so as to move each alternate bar in the manner substantially as
herein set forth.