Improvements in Mechanical Stokers.
Year: 1892

page_text: Date of Application, 23rd Mar., 1892
Complete Specification Left. 25th Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Mechanical Stokers.
1, WILLIAM THYNE, Wholesale Stationer & Printer of 77 Montgomery Street,
Edinburgh, in the County of Midlothian, Scotland, do hereby declare the nature
of this invention to be as follows:-
This invention is for the purpose of automatically supplying fuel for heating hot
water boilers without the aid of steam or other motive power. The principle on
which it is wrought is that of a clock, with a driving weight, the balance of which
is periodically set, or by a water wheel, or by both combined. This in turn causes
several other wheels to revolve which turns an endless set of furnace bars which
carry the coal contained in a large iron box placed at the outer end of the furnace
bars into the furnace, thus supplying the fire with fuel. The weight is periodically
wound up and goes for a time, to the extent of 48 hours if required.
The feeding of the furnace may be regulated by the flow of water through the
medium of a cock placed on the supply pipe from cistern or other place, and if
desired the same water may be used over and over again, so that twelve pails of
water will do the work for one month or so.
Dated this 14th day of Anril 1809
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioner's Agents.
་
COMPLETE SPECIFICATION.
Improvements in Mechanical Stokers.
I, WILLIAM THYNE, Wholesale Stationer and Printer of 77 Montgomery
Street Edinburgh in the County of Midlothian Scotland; 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 relates to improvements in mechanical stokers and has for its
object to automatically supply the coal to the furnace for heating hot water boilers
or for other similar purposes; the invention being specially applicable where need
exists for regular stoking without the constant attendance of some one to keep
fires burning.
Figure is a plan of the apparatus.
Figure 2 is a side view and Figure 3 is a detail.
The furnace bed consists of a number of fire bars A jointed together at a and
forming an endless band around two square barrels B; one barrel only being shown
in the drawing-namely that barrel which is below the coal hopper which hopper
is not shewn in the drawings. The endless travel of the furnace bars is effected
by means of a suspended weight, not shewn in the drawings, which draws up the
rope C which rope has been previously wound round the drum D by affixing a
handle on the squared end of the shaft E and rotating the toothed wheel F by the
pinion e. As the drum is rotated by the rope it sets the travel of the fire bars in
motion through the wheel G gearing with the wheel H, turning the shaft I and
the rest of the gearing K L. The motion of the furnace bars is preferably inter-
mittent so that as the weight of coals from the hopper rests upon the bars a small
quantity of coal is intermittently fed along from under the hopper into the furnace.
The said intermittent feed of the furnace bars is regulated by means of the water
wheel M which is provided with buckets m as shewr in Figure 3. As the buckets
become filled from the cistern N, the weight thereof gives a motion of rotation, to

page_text: the water wheel which through the shaft m' and worm m² gives a motion of partial
rotation to the worm wheel P, keyed on the shaft Q which in turn gives, through
the toothed wheel g, a partial motion of rotation to the toothed wheel J which
actuates the fire bars through the gearing as herein before described.
R is a ratchet wheel with pawl, as a check on the barrel when winding up the
weight.
Variation in the feed to the furnace bars may be effected by varying the flow of
water from the water cistern.
The apparatus can be regulated to run for any number of hours: without requiring
attention.
If desired the water after passing from the wheel could be. conveyed back to the
tank and made to do duty again and thus save water. This could be effected by an
endless chain of buckets.
It will be seen that by simply winding up the weight the stoking is automatically
effected and made to continue for 48 or any other convenient number of hours and
when the weight has run down the apparatus can be immediately set to work
again with another winding up of the weight. I may employ any equivalent of.
the water wheel such as a swinging pendulum after the manner of regulating
...clockwork.
In lieu of the motion of the furnace bars being, intermittent, it may be
continuous.
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. The general arrangement and construction of apparatus for automatically
stoking furnaces substantially as hereinbefore described and shewn in the accom-
panying drawings.
2. The suspended weight, or the mechanical equivalent of the same, for actuating
the driving gear for the furnace bars.
3.. The water wheel,. or. the mechanical equivalent of the same; for, regulating the
driving power of the weight.
4: The arrangement of the endless fire bars.
Dated' this 24th. day of August 1892.
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.