Improvements in or relating to Fire Bars for Steam Boilers.
Year: 1892

page_text: Date of Application, 25th Mar., 1892
Complete Specification Left. 23rd Dec. 1892-Accented 25th Mar
1803
PROVISIONAL SPECIFICATION.
Improvements in or relating to Fire Bars for Steam Boilers.
We JOHN ARKILL of 112 Broughton Road Fulham Engine Fitter and JOHN
PRICE of 13 Varna Road Fulham Engine Fitter both in the County of Middlesex,
do hereby declare the nature of this invention to be as follows:-
The object of this invention is improvements relating to fire bars whereby fine
coals may be burnt and by which the draught may be altered at will acting as a
damper...
According to this invention under the fire bars proper we mount a second set of.
adjustable bars in such a way that they can be raised and lowered at will by
suitable means the bars being of such form that when they are fully raised up they
shall close the spaces between the permanent bars but when only partially raised
there shall be more or less space as the case may be and when completely lowered
the permanent bars will not be effected but act in the ordinary way.
The permanent bars are also niade of suitable form so as to correspond with the
adjustable ones.
BROWNE & Co.,
9, Warwick Court, Gray's Inn, W.C., Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in or relating to Fire Bars for Steam Boilers.
We, JOHN ARKILL of 112 Broughton Road Fulham S.W. Engineer and
JOHN PRICE of 40 Francis Street Chelsea, S. W. Engineer 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:-
Our invention has for its object improvements in firebars generally and more
particularly those in use in steam boilers. The objects being first:-To allow a
fuel of any degree of fineness to be burnt readily without waste and secondly:-To
allow of the clinker formed on the firebars being more readily removed. These
results are obtained by the following means:-Underneath the working firebars
of the grate are placed an additional set of bars so arranged that they can be
adjusted vertically to any required position within certain limits, the effect being
that when the lower bars are cast in a suitable shape and are raised or lowered the
spaces between the ordinary firebars are filled up in a greater or less degree, thus
Fig. A Sheet 1 shows the adjustable firebars Nos. 1. 1. 1. raised up to their
fullest extent, and Fig. C the adjustable firebars Nos. 2. 2. 2. lowered.
It will be noticed that the bars Nos. 1. 1. 1.
are raised so as to project
above the surface of the ordinary firebars, the object of this is for the purpose of
loosening the clinker and making it more readily removeable. Figs. A & C
Sheet 1 are sectional views of the adjustable and ordinary firebars. Fig. B
Sheet 1 shows a side view of the adjustable and ordinary firebars.
•
In regard to the method of raising or lowering the adjustable firebars it can be
done by an arrangement of rods, cams and brackets such as are shown on the
drawings.
In the drawings Nos. 1. 1.
2. 2. . . . . shew the adjustable firebars.
Nos. 3. 3.
the ordinary firebars. Nos. 4. 4.
are the cams used for
raising and lowering the bearing bar No. 10 on which the adjustable firebars rest.
No. 5 is the shaft on which the cams No. 4 are keyed. Nos. 7. 7. . . are the brackets

page_text: supporting the shaft which may be in shape as shewn or in any shape to suit the
boiler being treated. No. 8 is a rod connecting the two cams No. 4 together so as
to ensure the bearing bar No. 10 on which the adjustable firebars rest being raised
equally at each end. No. 9 is a rachet wheel for the purpose of keeping the
bearing bars on which the adjustable firebars rest in any required position.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A set of adjustable firebars placed under the ordinary firebars so arranged
that they can be adjusted vertically in such manner as to reduce the air spaces
between the ordinary firebars to any required width.
2. A set of adjustable firebars placed under the ordinary firebars so arranged
that they can be pushed up through the spaces in the ordinary firebars.
Dated this Twenty-third day of December 1892.
JOHN, ARKILL.
JOHN PRICE.