Improvements Applicable to Steam Boiler Furnaces.
Year: 1889

page_text: Date of Application, 30th Oct., 1889
Complete Specification Left, 30th July, 1890-Accepted, 30th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements Applicable to Steam Boiler Furnaces.
I EDWARD COLLINGE of the firm of James Collinge and Sons, of Commercial Mills
Oldham in the County of Lancaster Cotton Spinners and Manufacturers do hereby
declare the nature of this invention to be as follows
This invention is applicable to that class of furnaces for which Letters Patent dated
August 2nd 1888 and Numbered 11173, were granted to Absalom Francis and Ernest
Manbrè wherein a supply of compressed air is admitted into the furnace through a
suitable arrangement of pipes so as to obtain more perfect combustion of the fuel.
The object of the present invention is to connect the furnace door with the air
supply pipe in such a way that the opening of the furnace door shall automatically
open a tap or valve in the air supply pipe, and hold the same in this position whilst
the fuel is being supplied and, that upon the closing of the furnace door the tap or
valve shall not be closed immediately, but shall be slowly and gradually closed by
automatic means.
For this purpose I attach to the furnace door at or near the hinge a link the other
end of which is connected to a cranked lever.
The other end of this lever is provided with a slot through which a vertical sliding
rod passes, and comes beneath a finger or projection attached to the said vertical
sliding rod. To this rod is connected a lever or handle fixed to the plug of the tap in
the air supply pipe, so that as the furnace door is opened the link actuates the cranked
lever and the latter raising the sliding rod causes the handle or lever before mentioned
to open the tap or valve on the air supply pipe and admit a supply of compressed air
to the furnace.
As the furnace door is closed again it does not pull down the sliding rod again so as
to close the valve as the cranked lever merely recedes from the finger or projection.
At the top of the sliding rod is a catch which as the rod is lifted by opening the
door over-runs the teeth of a catch wheel fixed upon a slowly revolving shaft, and
when the rod is raised to its highest point the catch retains it there and prevents it
from falling at once, but as the shaft revolves slowly it gradually allows the sliding
rod to descend and thus slowly closes the tap or valve in the air supply pipe.
Or in some cases instead of the above arrangement I propose to use a chamber of
compressed air which is actuated by the sliding rod, so that as the rod is forced up
when the furnace door is open it fills the said chamber with air and as it escapes
through a small aperture it allows the rod to descend slowly and close the valve.
Dated this 29th day of October 1889.
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements Applicable to Steam Boiler Furnaces.
I EDWARD COLLINGE of the firm of James Collinge and Sons of Commercial Mills
Oldham in the County of Lancaster Cotton Spinners and Manufacturers 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 is applicable to that class of furnaces for which Letters Patent dated
August 2nd 1888 and Numbered 11173, were granted to Absolom Francis and Ernest
Manbré wherein a supply of compressed air is admitted into the furnace through a
suitable arrangement of pipes so as to obtain more perfect combustion of the fuel.
Pin I

page_text: The object of the present invention is to connect the furnace door with the air
supply pipe in such a way that the opening of the furnace door shall automatically
open a tap or valve in the air supply pipe and hold the same in this position whilst
the fuel is being supplied, and that upon the closing of the furnace door the tap or
valve shall not be closed immediately but shall be slowly and gradually closed by
automatic means.
The nature of my invention and the manner in which the same is to be performed
or carried into practical effect will be readily understood on reference to the sheet of
drawings hereunto annexed and the following explanation thereof.
Fig. 1 on the drawing is a front elevation of a steam boiler furnace with my
invention shown as applied thereto and
Fig. 2 is a side elevation of a portion thereof hereinafter more particularly
referred to.
For the purposes of my invention I attach to the furnace door a near to the hinge b
a link c the other end of which is connected to one arm of a cranked lever d.
The other arm of this lever is provided with a slot through which passes a vertical
sliding rod e, and comes beneath à collar, finger, or projection f attached to the said
vertical rod e. Through a slot in this rod e passes a lever or handle g fixed to the
plug of the tap in the air supply pipe i, so that as the furnace door a is opened the
link c actuates the cranked lever and the latter raising the sliding rod e causes
the handle or lever to open
the tap or valve on the air supply pipe i and admit a
supply of compressed air to the furnace.
As the furnace door a is closed again it does not pull down the sliding rod e again
with it so as to close the valve or tap has the cranked lever g merely recedes from
the finger or projection f
At the top of the sliding rod e is a catch; which as the catch is lifted by the
opening of the door a over-runs the teeth of a catch wheel (sce also side elevation
Fig. 2) which is fixed upon a shaft and the latter is kept slowly revolving in the
direction of the arrow.
When the rod e is raised to its highest point the catch is arrested by the teeth of
the wheel and retains the rod e in that position and prevents it from falling at once
when the door is closed but as the shaft continues to revolve slowly it gradually
allows the sliding rod e to descend and thus slowly closes the tap or valve / on the
air supply pipe i.
Or, in some cases instead of the above arrangement I propose to use a chamber of
compressed air which I provide with a valve actuated by the sliding rode so that as
the rod is forced up when the furnace door is opened it fills the said chamber with air
and as it escapes through a small aperture it allows the rod to descend slowly and
close the valve.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim as my
improvement in furnaces of the class hereinbefore referred to is
The combination with the furnace door of a link and lever, with a vertical sliding
rod connected to a tap or valve in the air supply pipe in such a way that the opening
of the furnace door shall open the said tap or valve and admit a supply of compressed
air to the furnace and the closing of the said door shall leave the said tap to be slowly
closed automatically substantially as hereinbefore described and illustrated by tho
drawings annexed.
Dad: 2011 1
T i 1000
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.