Improved Appliances for Securing Automatic Regulation of Air in connection with Smoke Consuming Apparatus.
Year: 1893

page_text: Date of Application, 5th Sept., 1893
Complete Specification Left, 31st May, 1894-Accepted, 28th July, 1894
PROVISIONAL SPECIFICATION.
Improved Appliances for Securing Automatic Regulation of Air in
connection with Smoke Consuming Apparatus.
JOHN THOMAS HOWSON, No. 570 Queen's Road, Sheffield, Engineer, and
HENRY MILNES, No. 19 Wolseley Road, Sheffield, Manager, and SAMUEL
HINDLEY, No. 126 Lansdowne Road, Sheffield, Electrical Engineer, do hereby
declare the nature of this invention to be as follows:-
The object of our invention is to ensure the regular admission of air to smoke
consuming apparatus, (such for instance as those constructed in accordance with
the Patent granted unto us the said John Thomas Howson and Henry Milnes, and
Dumbered 4431 of 1890) whenever fresh fuel has been added to the fire; and to
gradually cut off such air supply, during a determined period, corresponding to the
time required for such fuel to become incandescent.
In carrying our invention into practice, we take a cistern or vessel containing
water or other liquid, and therein suspend loosely another vessel open at the top,
and having its lower end either flat, or of peculiar shape to facilitate its immersion
in the liquid; such vessel being also fitted with a valve or valves, which close and
retain the liquid so soon as the upward flow or motion has been arrested; while
around the lower edge or in bottom are a series of smaller holes, with or without
valves, which permit the liquid to leak out and thus allow the said inner vessel to
rise and thereby transmit motion to levers and rods attached thereto and to the
air valve of the apparatus.
The sinking of the inner vessel is effected by the opening of the firing door by
means of a system of suitable rods and levers: while the time of rising may be
varied by means of balance weights, springs, or by regulating the area of the outlet
openings in the said inner vessel.
Dated this 4th day of September 1902.
ISAAC BECK, C.P.A.,
Sheffield, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improved Appliances for Securing Automatic Regulation of Air in
connection with Smoke Consuming Apparatus.
We, JOHN THOMAS HOWSON, 570 Queen's Road, Sheffield, Engineer, and
HENRY MILNES, 19 Wolseley Road, Sheffield, Manager, and SAMUEL
HINDLEY, 126 Lansdowne Road, also of Sheffield, Electrical 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:―
The object of our invention is to ensure the regular admission of air to smoke
consuming apparatus, (such for example as those constructed in accordance with
the Patent granted unto us the said John Thomas Howson and Henry Milnes, and
numbered 4431 of 1890,) whenever fresh fuel has been added to the fire; and to
gradually cut off such air supply during a determined period, corresponding to the
time required for such fuel to become incandescent.

page_text: In carrying our invention into practice, we take a cistern or vessel containing
water or other liquid, and therein suspend loosely another vessel open at the top,
and having its lower end either flat or of peculiar shape to facilitate its immersion
in the liquid, said vessel being also fitted with a valve or valves, which close and
retain the liquid so soon as the upward flow of liquid or downward motion of
vessel has been arrested: while around the lower edge or in bottom are a series of
smaller holes, with or without valves, which permit the liquid to leak out and thus
allow the said inner vessel to rise and thereby transmit motion to levers and rods
attached thereto and to the air valve of the apparatus.
The sinking of the inner vessel is effected by the opening of the firing door by
means of a system of suitable rods and levers; while the time of rising may be
varied by means of balance weights, springs, or by regulating the area of the outlet
openings in the said inner vessel.
In order that our invention may be more readily understood, we show on the
accompanying sheet of drawings the means we prefer to use as applied to a
Lancashire boiler, in connection with our Patent hot air bridges and apparatus.
Fig. 1. is a front elevation of the firing end of the boiler of which the upper
portion is removed, and shows the position of the whole apparatus immediately after
the fire box door has been closed.
Fig. 2. illustrates on a larger scale an inner vessel having its bottom surface
shaped to facilitate its sinking and the passage of the liquid through a comparatively
large central admission valve.
Fig. 3. is a side elevation of aforesaid boiler, partly in section, to enable the
relative positions of the several parts to be seen.
Fig. 4. shows the same in plan.
Similar letters indicate like parts in all the figures.
'
.i
a, represents the boiler generally. b, the firing door. c, the cistern or vessel
partially filled with liquid, d, the inner vessel suspended loosely therein and..
attached to lever, i. e, is the admission valve. f, an outlet regulating valve or tap.
y, a series of plain small outlet holes. h, a balance weight adjustable on lever to
initiate an upward movement of inner vessel d. j. the joint pin of firing door with..
its prolongation and tappet lever attached to its lower end. k, air admission valve
to bridges. I, the grate bars. m, m' the hollow bridges.
:
The whole of the said parts may be fixed in any convenient and suitable position
The water cistern, c, may be of any size or shape, the liquid therein must not however
rise higher than the underside of the inner vessel, d, when at its highest position,
that is to say, when it is free from liquid, and when the air admission valve, k, is
closed. The said inner vessel, d, may likewise be of any size or shape, but we
prefer to make it cylindrical, comparatively shallow, and with its bottom surface
coned or hollowed upwards to facilitate its sinking by a more rapid passage of the
liquid through the central valve, e: The number, size and disposition of the outlet
valves, f, and smaller holes, g, we proportion to the friction and weight of the parts
to be moved, and also to secure the closing of the air valve in any desired period of
time, this to some extent is also regulated by the position of the balance
weight, h.
All being in position, whenever the firing door, b, is fully opened, the prolongation
of the hinge pin, j, will through the several levers and rods as is well understood
open the air valve, k, will raise balance, h, depress lever, i, causing inner vessel, d,
to sink and to be filled with the liquid, thereby retarding the return of the several
parts to their normal positions for a period of time proportionate to the facilities
given for the liquid to escape from the inner vessel: The time of closing being
further easily varied or regulated by altering the area of the outlet valve or
tap, f.
We are aware that the action of opening the firing door has been utilised for
operating levers and rods connected with various air regulating devices: we do not
therefore claim them separately as any part of our invention.
•

page_text: 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 a device for the automatic regulation of air admitted to a smoke consuming
apparatus, the combination of a cistern partially filled with liquid, a moveable
vessel shaped to pass freely into the liquid and having means for admitting such
liquid through its bottom, also means for regulating or varying the outflow of
liquid therefrom, to thereby operate and slowly close, through a series of levers
and rods, in any required or pre-determined time, the air admission valve of a
smoke consuming apparatus; substantially as described.
Dated this 30th day of May 1894.
ISAAC BECK, Rd. P.A.,
Sheffield, Agent for the Applicants.