Improvements in Appliances for Burning Smoke in Steam- boiler Furnaces.
Year: 1890

page_text: ate of Application, 7th Mar., 1890
Complete Specification Left, 8th Dec., 1890-Accepted, 17th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Appliances for Burning Smoke in Steam-
boiler Furnaces.
We, JOSEPH LEVER of Number 11 Marsden Square Manchester in the County of
Lancaster Engineer, JOB HOLLAND of Number 11 Marsden Square Manchester afore-
said Morchant and WILLIAM HENRY TODD of Number 9 Tib Lane Manchester afore-
said Solicitor do hereby declare the nature of this invention to be as follows :-
An automatic regulator consisting of a cataract cylinder is connected by rods with
a damper or door-whereby the admission of air behind the fire is excluded when a
sufficient time has elapsed and which time can be regulated.
Dated this Sixth day of March 1890.
JOSEPH LEVER.
JOB HOLLAND.
W. HENRY TODD.
COMPLETE SPECIFICATION.
Improvements in Appliances for Burning Smoke in Steam-
boller Furnaces.
We JOSEPH LEVER of Number 11 Marsden Square Manchester in the County of
Lancaster Engineer JOB HOLLAND of Number 11 Marsden Square Manchester
aforesaid Merchant and. WILLIAM HENRY TODD of Number 9 Tib Lane Manchester
aforesaid Solicitor 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:-
When fresh coal is supplied to the furnaces of steam boilers a large quantity of
combustible gases is given off which if only partially consumed produce smoke. In
order to burn these gases completely an extra supply of air is required but when the
coal becomes coked this extra supply is no longer necessary and the continued
admission of air not necessary for combustion would by its cooling effect cause a loss
of heat and therefore would not be economical. To supply this necessary extra
quantity of air when the coal is thrown on the fire and to regulate the supply therefor
automatically as the requirement for the air diminishes, we have devised the
following arrangement which we will describe in connection with the drawings hereto
annexed.
Figure 1 Sheet 1 is a section of the furnace in the flue of a Lancashire boiler with
our arrangements shewn complete.
Figure 2 Sheet 2 is a detail drawing of the cataract cylinder marked F in Figure 1.
The parts represented in section are shaded with sectional lines.
In Figure 1. A is the bridge B. B are the fire bars. C is a box placed in the bridge.
1) is the door or damper F is a cataract cylinder. The door D is connected with the
ataract cylinder by rods or a chain. The drawing represents the connection_as
made by means of a chain as we have found that to be the most convenient. The
cataract cylinder rests upon a bracket G affixed to the boiler.
The cataract cylinder is shewn in greater detail in Figure 2 and consists essentially
of a cylinder H. with a piston J working inside. K is the piston rod with a cross
head K' and L is the cover of the cylinder. The piston rod is affixed to a lever M in
which is a slot O. A pin P is passed through this slot and through the holes in the
cross head K. The lever M is fastened to a rocker shaft R which works in a boss in
the bracket G. On the other end of the rocker shaft is affixed another lever I to
he end of which the chain E shewn in Figure 1 is attached. The piston J is pierced

page_text: with one or more holes V, V. On the underside of the piston is a loose disc W
which when pressed against the piston covers the holes V. V. Through the disc W
one or more pin holes may be bored as found desirable. Other known forms of valves
may be used in place of the disc above-mentioned. The cylinder is filled with oil or
paraffin or other suitable liquid.
Having now described the construction of our arrangements we will describe the
method of working. When the stoker has thrown fresh coal on the fire he lifts up
the lever M, (Figure 1) which pulls the chain E and so opens the door D. In lifting
up the lever M. he also lifts up the piston (Figure 2). The holes V, V, in the piston
allow the oil or other liquid to How freely into the lower part of the cylinder.
Immediately the stoker releases the lever M the door D (Figure 1) would tend to fa'l
back by reason of its weight but being connected as before described would press
down the piston J (Figure 2) in the cylinder H but immediately the piston begins to
descend the oil or other liquid presses the disc W against the holes and so prevents
the return of the liquid except by means of the small pin hole or holes in the disc.
By this means the piston is prevented from returning to the bottom until the time
necessary for the oil or other liquid to pass through the pin hole into the upper portion
has elapsed. The door D Figure 1 is thus opened to udinit air during the time the
piston is descending, and so automatically regulates the admission of the air.
By varying the size or number of the pin holes the time of descent of the piston
can be regulated, and thereby the time the door is open for admission of air.
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. In apparatus for burning smoke in steam boiler furnaces the automatically
regulating the admission of air at or behind the fire by means of a cataract cylinder
constructed and operated substantially as hereinbefore described and as illustrated by
the accompanying drawings...
--2: In apparatus for burning smoke in steam boiler furnaces the combination and
arrangement of an airway at or behind the fire a door controlling the airway and a
cataract cylinder connected with the door substantially as and for the purpose herein-
before described and as illustrated by the accompanying drawings.
Dated this Sixth day of December 1890.
JOSEPH LEVER.
JOB HOLLAND.
W. HENRY TODD.