Improvements in or appertaining to Mechanical Stokers or the like.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or appertaining to Mechanical Stokers or the like.
I, ALFRED COTTON, of 27, Bath Street, Port Sunlight, in the County of Chester,
Engineer, do hereby declare the nature of this invention to be as follows:-
In the Complete Specification of Patent No. 18901 of 1895 a method and means
are described for the automatic feeding of fuel into a furnace. The main objects
of the present invention are to improve and simplify the construction of the
device so as to give better efficiency in feeding and durability in practice.
The first part of my invention relates to the jet. Instead of using the saw cut
orifice shown in the drawings of the specification above referred to, I cause
the steam to issue at an angle in a downward direction from a central, preferably
circular, orifice and to impinge on a deflecting plate immediately below it. This
will give a good spread to the issuing jet of steam.
According to the second part of my improvements instead of employing the
usual means for actuating the feed rolls I prefer that each stoker shall have a
separate steam motor or engine so that in the case of a break down or idleness
of one stoker, the others of a series need not be affected as is the case when all
are driven off one shaft as usual. I may employ one or more additional jets of
steam to impinge on and direct the moving fuel.
The exhaust steam from the engine of each stoker may be used in feeding the
fuel or stimulating the draught.
J
1007
CHARLES COVENTRY,
Patent Expert, Applicant's Agent.
Improvements in or appertaining to Mechanical Stokers or the like.
I, ALFRED COTTON, of 27, Bath Street, Port Sunlight, in the County of Chester,
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:-
In the Complete Specification of Patent No. 18901 of 1895 a method and means
are described for the automatic feeding of fuel into a furnace. The main objects
of the present invention are to improve and simplify the construction of the
apparatus so as to give better efficiency in feeding and durability in practice.
The first part of my invention relates to the jet.
In the drawings accompanying this specification,

page_text: Fig. 1 is a similar view to Fig. 2 of the above mentioned specification, but
showing my improved jet in place of the jet E.
Fig. 2 is a similar view to Fig. 3 of the afore mentioned specification showing
all the essential parts thereof so far as is necessary to illustrate my present
improvements. This fig. likewise shows the improved jet in place.
Figs. 3 and 4 are respectively a plan view and a section of my improved jet.
The letters of reference shown on the accompanying drawings correspond with
those on the drawings of the prior specification whilst the parts that are novel are
indicated by numerals.
1 shows the body or shank of my improved jet. It is adapted to be coupled
up to a pipe (such as D) which feels it with steam. Its bore 2 stops short at 3,
but is continued as a smaller bore 4 struck at an angle with the horizontal and
whose exit is just above a projection 5, so that the issuing jet of steam impinging
thereon is thus spread forward and laterally. Guiding walls or arms 6 serve to
confine the track of the steam by preventing too great a spread. The jet is
conveniently made of cast iron.
According to the second part of my improvements instead of employing the
usual means for actuating the feed rolls I prefer that each stoker shall have a
separate steam motor or engine so that in case of a break down of one stoker, the
others of a series need not be affected as is the case where all are driven off one
shaft as usual. Another great advantage of this arrangement is that the stoking
mechanism for each boiler is self contained, which is convenient in fitting and
does away with the necessity of providing a line of shafting. Each motor will
comprise a steam cylinder whose back end may be bolted to the front of the
boiler, and whose connecting rod will drive a counter shaft supported in suitable
brackets. This counter shaft will turn the feed rolls by means of suitable
reducing mechanism such as spur or worm gearing.
Where movable fire bars are employed they may conveniently be driven from the
counter shaft above mentioned.
The exhaust steam from the engine of each stoker may be used in feeding
the fuel or stimulating the draught.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. In a device for feeding fuel by means of a jet of steam, the jet 1, having
bore 2, terminating in a narrower bore 4, which latter slants in such manner
as to direct the steam on to a projection 5. whereby the steam is caused to spread
in a forward and lateral direction, its lateral spread being limited by arms or
walls 6, substantially as described.
2. In a mechanical stoker the employment of a separate engine for each boiler,
said engine being attached to the front thereof, the whole combined and arranged
to form a self contained apparatus, substantially as described.
Dated this 26th day of August 1898.
CHARLES COVENTRY,
Patent Expert, Applicant's Agent.