of or Steel bars T shape in the Fire Boxes of Steam Boilers or of boilers of any kind, used for generating steam.
Year: 1886

page_text: Date of Application, 27th Nov., 1886.
Complete Left, 5th Apr., 1887.
Complete Accepted, 6th May, 1887.
JAMES HENDERSON Station Lane Sandal Magna Wakefield Cashier do hereby
declare the nature of this invention to be as follows:-
The fixing of Iron or Steel bars T shape in the Fire Boxes of Steam Boilers or of
boilers of any kind, used for generating steam.
I claim the following as some of the advantages to be derived from the use of
T metal.
1st. Bars of T shape will keep cooler than those of any other shape.
2nd. They will allow air to get nearer to the fires and so cause greater heating
power with less waste of fuel.
3rd. They will be less liable to clag, if at all.
I JAMES HENDERSON of Station Lane, Sandal Magna, Wakefield in the county
of York 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 consists of fixing iron or steel fire bars of T shape in the fire boxes
of steam boilers, and of other furnaces, one, two, or more of these T bars are
preferably cast or formed together leaving the necessary air spaces between them.

page_text: The top surface of the bars are kept comparatively cool by reason of the quantity of
air space on the underside, which draws in the air, and prevents the ashes, clinkers, or
products of combustion from adhering to the bars, the air space being kept open and
clear.
Bars of this shape will keep cooler than of any other shape. The bars are so
notched, that the air can pass under the fire surface, and over the bearer on which the
bars rest, which causes a through draught, and prevents the bars from burning off at
that part which is generally the case with bars of any other construction, they allow
considerably more air to get nearer to the fires, and so cause greater heating power
with less waste of fuel, and a larger consumption of smoke; they are not liable to clag
or make up. The bearers for these bars are made specially with the side pieces jointed
together lower down, to allow the notches or recesses to fall into their places, and the
bearers are bevelled on the top edges to allow the ashes to fall or roll off the bearers,
which also prevents the bars from making up and burning off.
products of
clear.
combustion Oanering to The Day one ar space so p
Bars of this shape will keep cooler than of any other shape. The bars are so
notched, that the air can pass under the fire surface, and over the bearer on which the
bars rest, which causes a through draught, and prevents the bars from burning off at
that part which is generally the case with bars of any other construction, they allow
considerably more air to get nearer to the fires, and so cause greater heating power
with less waste of fuel, and a larger consumption of smoke; they are not liable to clag
or make up.
The bearers for these bars are made specially with the side picces jointed
together lower lown, to allow the notches or recesses to fall into their places, and the
bearers are bevelled on the top edges to allow the ashes to fall or roll off the bearers,
which also prevents the bars from making up and burning off.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a plan of double T bar.
Fig. 2 is a plan of treble T bar.
Fig. 3 is a side elevation of T bar with bearing bar.
Fig. 4 is a plan of underneath of double T bar.
Fig. 5 is a full sized section of a treble T bar.
Fig. 6 is a full sized section of a double T bar.
Fig. 7 shows section of the single T bars.
A is the top or fire surface of the bars, B is the web which may be made deeper if
desired, C is the air space between the bars, D is the bearing bar constructed so that
the air can freely circulate through the space, which effectually prevents the bars
burning out at this point which is generally the case with bars of any other con-
struction; the air space allows the air to come close to the underside of the fire
surface, and so keeps the bars comparatively cool; this form of air space draws in
the air to the fire and prevents the ashes, clinkers, and products of combustion from
adhering to the bars, the air space between them being kept open and clear; single
bars are used chiefly for filling up at the sides of the furnace, but the bar I prefer is
the double bar for lightness, strength and durability, bars constructed as above
will keep cooler than any other construction of bars, and the air can get closer to the
top or fire surface of the bar, than by any other construction the draught is thereby
improved, and a greater heating power is obtained with less waste of fuel, and a larger
consumption of smoke.
The bars may be either cast or rolled, and of iron or steel, and may be applied to
any shape of fire box, or furnace, either longitudinally or crosswise, the boiler or
furnace flue may be in any number of lengths, or in one length, as preferred.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
1. The use and employment of the T shaped bars, formed with air spaces,
substantially as and for the purposes shown and described."
2. The combination of the T shaped bars, with air spaces and bearing bars,
constructed substantially as and for the purposes, shown and described.
Dated this Thirty first day of March 1887.
CANטה בבדTT ה-T
JAMES HENDERSON.
John E. Walsh,
Crossley Street, Halifax,
Agent for the Applicant.