IMPROVE- MENTS IN TRAVELLING GRATES FOR FURNACES to be as follows:
Year: 1884

page_text: We TOM MILBURN and CHARLES WILLIAM HAYDON of the firm of William
Milburn and Sons of Stalybridge in the County of Lancaster, Engineers and
Ironfounders, do hereby declare the nature of the said invention for "IMPROVE-
MENTS IN TRAVELLING GRATES FOR FURNACES to be as follows:-
"
Our said Invention relates to travelling grates for furnaces and consists chiefly
of a novel economical and expeditious method of forming and connecting together
the bars of such grates.
According to our invention we cast the bars in pairs each pair of bars being
provided at one end with cored or bored snugs or projections and at the other end
with gudgeons or pins cast on. In putting the pairs of bars together to form a
grate we slide one of the two pins cast on the first pair of bars into one of the two
holes cored or bored in the snugs on the second pair of bars so as to hinge the two
pairs of bars together. This coupling operation is repeated with the remaining
pairs of bars until the chain of bars forming the traversing grate is complete. The
traversing of the grate is effected by properly pitched toothed wheels actuated in
any suitable manner and which gear with the bars so as to slowly traverse the chain
of bars from front to rear of the furnace. The ends of the bars are arranged to
slide over, under or between lips or flanges at each side of the furnace. In forming
the aforesaid grate we do not confine ourselves to casting the bars in pairs as four
might be cast together, and although we consider it preferable to cast the gudgeons
or pins on the bars as herein before described we might in certain cases use inalleable
iron pins, rods or gudgeons rivetted, screwed or otherwise fixed into projections on
the bars provided and prepared to receive them.

page_text: We TOM MILBURN and CHARLES WILLIAM HAYDON of the firm of William
Milburn and Sons of Stalybridge in the County of Lancaster, Engineers and
Iron Founders do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN TRAVELLING GRATES FOR FURNACES" and in what manner the same is
to be performed to be particularly described and ascertained in and by the
following statement and accompanying drawings:-
Our said Invention relates to travelling grates for furnaces and consists chiefly of
a novel, economical and expeditious method of forming and connecting together the
bars of such grates.
According to our Invention we form the bars with cored or bored snugs or
projections and at the other end with projecting pins. In putting the bars together
to form a grate we enter the pin on one bar into the hole in the snug on the other
bar at both ends of the bars so as to hinge the two bars together. This coupling
operation is repeated with the remaining bars until the chain of bars forming the
traversing grate is complete. The traversing of the grate is effected by properly
pitched toothed wheels actuated in any suitable manner and which gear with the
bars so as to slowly traverse the chain of bars from front to rear of the furnace.
Our Invention will be more fully understood by reference to the accompanying
sheet of drawings wherein Fig: 1 represents a longitudinal section of one end of a
chain of fire bars and Fig: 2 represents a cross section of the chain of bars and of
the guiding and supporting side rails. Fig: 3 is a top view of two bars and Fig: 4
represents the same inverted so as to show the undersides. In the said Figs: a a
are the fire bars and b. is one of the end carrier wheels which are fixed upon a
shaft c. Each bar is cast with four snugs d. e. which project from each side of the
central web below the top or face of the bar. These snugs are of two forms the
snugs e. being cored or bored so as to form eyes, whilst the snugs d are formed
with pins or studs which project in the direction of the length of the bar. Each bar
has two of the snugs e. at one end and two of the snugs d at the other end. When
two bars are reversed with relation to each other in the manner indicated in Fig: 4
a pin on one bar can be entered into an eye on the other bar so as to connect the
two bars together as clearly indicated in Fig: 4. In the same manner any required
number of bars can be connected together so as to form a grate or chain of fire bars
and the two ends of the chain can be linked together so as to form an endless
chain. As the attachment is in the form of a hinge the chain of bars passes readily
around the carrying wheels at each end of the chain. The form of one of these
wheels is clearly shown in Fig: 1 wherein it will be seen that the said wheel b. is
formed with hollows g. g. which receive the rounded ends of the snugs d In Fig: 5
one of these wheels is represented in vertical section as acting upon two bars at the
top and bottom of the chain. As the wheel revolves the bars are carried partly
around the shaft c. upon which the wheels are fixed and the endless chain of bars
composing the grate is thereby caused to travel. The ends of the bars are chamfered
and slide upon ledges h h which project from the top and bottom of the two side
rails i. i. These ledges are inclined downward from the said rails so that any ashes
which may fall upon the ledges will tend to slide off them. We prefer to employ a

page_text: central longitudinal bar k. to guide the bars and to prevent endwise movement
thereof. In the example each bar is formed with projections a¹ which enter spaces
in the adjoining bars but this formation does not constitute a part of our Invention
and the form of the bars may be varied so long as what we may term the book and
eye attachment is employed to connect the bars together-that is to say the pins
on one bar entering eyes in another bar. In the example each bar is cast with two
pins or hooks at one end and with two eyes at the other end this being the
formation which we prefer but we do not confine ourselves to this formation as one
bar might be provided only with eyes and another bar only with hooks or pins or
there might be hooks or pins on one side of the bar and eyes on the other. If
preferred two or more bars may be cast together and the pairs or clusters of bars
be connected together in accordance with our Invention. In the example the pins
are cast in one piece with the snugs d but we do not confine ourselves to this as we
might in some cases or in any case use malleable iron or wrought iron or steel pins
or studs and secure them to the snugs or to the bars by riveting screwing or bolting
or by other suitable means or either or both of the parts d and e might be separately
formed and be secured to the bar.
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
1. An endless chain of fire bars composed of bars provided with projecting pins
or studs and with eyes or cored or bored snugs whereby the bars are hinged
together substantially as and for the purpose set forth and indicated herein before
and in and by the accompanying drawings.
2. Forming or providing fire bars with projecting or hooked pins or parts and
with eyes or cored or bored snugs in order that the bars may be hooked or connected
together substantially as set forth and indicated.
3. The combination of the endless chain of fire bars with the side supporting rails
and the driving wheels engaging with the snugs on the bars the whole constructed
substantially as and for the purpose set forth and indicated.
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