Improvements in Steam Boilers, a Combination to Obviate Expansion of the Plates and Collapsion of the Tubes.
Year: 1892

page_text: Date of Application, 30th July, 1892
Complete Specification Left, 27th Apr., 1893-Accepted, 8th July, 1893
PRAYIDIONAL DEBOLDALON.
Improvements in Steam Boilers, a Combination to Obviate Expansion
of the Plates and Collapsion of the Tubes.
WILLIAM DALTON 9 Dickson Road Blackpool in the County of Lancaster
Tin and Copper Smith do hereby declare the nature of this invention to be as
follows:-
My invention consists of a combination of two parts to increase the safety and
stability of steam boilers, by,
1st. Encircling the outside of the boiler with one or more bands of metal.
2nd. A star shaped attachment of wrought metal, or a casting of a similar shape
to be inserted in the tubes; thus increasing the heating surface and providing an
internal support against collapsion of the tubes.
In1
WM. DALTON.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers, a Combination to Obviate Expansion
of the Plates and Collapsion of the Tubes.
WILLIAM DALTON 9 Dickson Road Blackpool Lancashire Tin and Copper
Smith 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 :-
It is an invention for the purpose of providing a better and more substantial
method for making steam boilers and boiler tubes for locomotive, marine, Cornish
and others. It is also a simple and inexpensive mode of substituting the ordinary
straight seam of steam boilers or tubes with an oblique twisted or spiral seam. By
this means the strength and durability of the boiler is enormously increased; two
factors which will reduce danger and accident to a minimum.
By this invention it is claimed that a higher pressure of steam can be used with
absolute safety than by any other process.
Instead of forcing the seams at the rivets the oblique or twisted seams draw them
and produce a collateral resistant. The validity of this novelty consists in twisting
the metal sheets into a partial semi-circle to form an oblique or spiral seam
(marked C) whereby much stability is gained, strength and durability being at a
premium and becoming a safeguard against higher pressure. The boiler to meet
extremes of pressure must have strong hoops at intervals outside 3" or more deep.
packed tight with asbestos (marked D) and covered with another metal shell
(marked E) bolted strong so as to keep the heat in and thus becoming a collateral
resistant also.
56
The inventor also provides a simple but amazingly ingenious contrivance for
inserting into the boiler tubes namely, a star shaped longitudinal bar with
concentric supports whereby it is an impossibility for the boiler tubes to collapse;
the same invention provides for the expansion and contraction of the tubes by the
star bar" (marked A) and a self-adjusting stuffing slide or ferrule (marked B)
which screwed into the boiler plate and packed with asbestos, allows for the free
expansion and contraction of the boiler tube, which will obviate the warping
twisting and leakage of the tube and thus greatly reduce the cost of repairs to
rolling and moving stock.
This "star bar" is designed to break up the flame and heat which in existing
[Poins Rut

page_text: tubes passes through unarrested, and which by the aid of the star bar the flame
and heat is conducted to the surface of the tubes thus becoming a conductor and
an unrivalled economiser of fuel.
Hitherto engineers have been compelled to admit that in this department of the
boiler lies the greatest difficulty of their work. Improvements have been made in
every department except this, and up to the present time it has been found an utter
impossibility to grapple with it except through the safety valve or by reducing the
pressure. But the invention provides what will undoubtedly revolutionize the world
of engineering with his so-called "star bar" with unlimited points and shape, either
straight, twisted, honey combed or otherwise-according to the size and purpose of
the tubes all internal support is claimed by the above-mentioned "bars."
By the aid of the "bars" it will be seen that superheated steam with injected air
and a simple forced draught is a perfectly easy method and will be able to obtain
an unlimited amount of power which will require a quantity of compound cylinders
to utilise thus dispensing with a great amount of dead weight of boilers, water,
and fuel, and increasing speed extraordinarily, and surpassing all existing
appliances.
**
The forcibility of these combinations will produce another new feature hitherto
pronounced impossible, namely, that the water line in the boiler can stand below
the star bar tubes (marked F) at any depth without any danger or can even
stand empty. The boiler standing empty produces another new feature namely
dry firing" supplying water with an injected spray generating steam momentarily,
but the inventor does not suggest the absence or non-use of water but says that an
inadvertent lack of it would not cause explosion. I should recommend that water
should be nevertheless up to the depth of the second or third tube as may be
deemed necessary as the fire will rest under a portion of this. In case of emergency
it will be found very useful in the Admiralty and it is most expedient that these
methods should be adopted to remove the much dreaded weaknesses that now exist,
in the destruction of life and merchandise as evidenced by the catastrophe on
Lake Geneva.
By this method any tube or number of tubes can be taken out and replaced
without injury to the rest.
The "star bar" can also be fitted to any existing boiler tubes without alteration
thus improving their stability although they may have been in use many years.
It will be found very suitable for congested tubes and for cheapening motive
power for generating electricity.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is:-
1st. The star shaped longitudinal bar, with concentric supports marked A.
2nd. The self adjusting slide or ferrule inarked B.
3rd. The oblique twisted seams marked C.
4th The anti expansion hands or hoons marked D