Improvements in Steam Generators.
Year: 1890

page_text: Date of Application, 11th Oct., 1890
Complete Specification Left, 13th July, 1891-Accepted, 15th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
I, JOHN ISAAC THORNYCROFT, of Church Wharf, Chiswick, in the County of
Middlesex, a member of the firm of John I. Thornycroft & Co. Steam Yacht &
Launch Builders, do hereby declare the nature of this invention to be as follows:-
In the Specification of Letters Patent granted to me dated 31st Jan. 1885
No. 1404 there is described a steam generator constructed with a steam collector
and separator in which a curved baffle plate having notched lower ends or edges is
used to facilitate the separation of steam from streams of mixed steam and water
discharged upon it from a number of pipes that form the sides and ends of the
combustion chamber of the generator.
Now my present invention has reference to an improved construction of steamn
collector and separator of the kind referred to whereby the steam can be more
freely discharged from the pipes in which it is generated, and be more effectually
separated than heretofore from the water with which it is mixed, so as to obtain
the steam in a drier state the liability to priming being lessened.
For this purpose my improved collector and separator is constructed with a
central plate and lateral or side plates each of the latter being at a short distance
from and so as to partly overlap the central one leaving space between for the
flow of water and steam. These plates which have notched lower edges, are
arranged longitudinally within the upper part of a cylindrical vessel so as to forin
therewith a combined steam collector and separator to the upper part of which the
steam generating pipes are secured as before, the arrangement being such however
that some of the pipes discharge steam and water onto the side plates whilst the
others discharge steam and water onto the central plate. Below this latter plate
is the perforated steam outlet pipe for conducting the steam to an engine.
The central plate may be replaced by t70 plates having their upper edges above
the highest inlet openings for steam and water. In some cases only one set of
overlapping plates may be used arranged at one side of the vertical plane passing
through the centre of the combined collector and separator.
Dated this 11th day of October 1800
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Generators.
I, JOHN ISAAC THORNYCROFT of Church Wharf, Chiswick, in the County of
Middlesex, a member of the firm of John I. Thornycroft & Co. Steam Yacht
and Launch Builders, 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 Specification of Letters Patent granted to me dated 31st Jan. 1885
No. 1404, there is described a steam generator constructed with a steam collector
and separator in which a curved baffle plate having notched lower ends or edges
is used to facilitate the separation of steam from streams of mixed steam and water
discharged upon it from a number of pipes that form the sides and ends of the
combustion chamber of the generator.

page_text: Now my present invention has reference to an improved construction of steam
collector and separator of the kind referred to whereby the steam can be more
freely discharged from the pipes in which it is generated, and be more effectually
separated than heretofore from the water with which it is mixed, so as to obtain
the steam in a drier state, the liability to priming being lessened.
For this purpose my improved collector and separator is constructed with a
central plate and lateral or side plates each of the latter being at a short distance
from and so as to partly overlap the central one leaving space between for the flow
of water and steam. These plates, which have notched lower edges, are arranged
longitudinally within the upper part of a cylindrical vessel so as to form therewith
a combined steam collector and separator to the upper part of which the steam
generating pipes are secured as before, the arrangement being such however that
some of the pipes discharge steam and water on to the side plates whilst the others
discharge steam and water on to the central plate. Below this latter plate is the
perforated steam outlet pipe for conducting the steam to an engine.
In order that the nature of my present invention may be clearly understood
reference is had to the accompanying drawings in which,
Fig. 1 is a transverse section of a steam collector and separator constructed
according to this invention.
Fig. 2 is a longitudinal section of part of such a steam collector and
separator.
Fig. 3 is a longitudinal section, to a smaller scale, of the complete steam collector
and separator.
1 is a central curved plate, and 2, 2, are side plates constituting baffles or screens
arranged longitudinally within the upper part of the cylindrical vessel 3.
The central plate 1 is secured at intervals by set screws 4 and distance pieces 5
to the side plates 2, each of which is secured to the vessel 3, in the position shown,
by angle plates 6, set screws 7 and distance pieces 8. Each of these distance
pieces 8 may, as shown, be screwed through the shell of the vessel 3 and be rivetted
over on the outside to make a tight joint. 9, 9 are the pipes secured to the top of
the vessel 3, and through which streams of mixed steam and water are discharged
partly upon the central plate and partly upon the side plates. In Fig. 1 these
pipes are shewn at one side only of the top of the vessel 2, but with the
construction of baffle plates or screens shown, there would in practice be pipes at
both sides. Each of the plates 1 and 2 is formed with notches 10 each having
a flange at one side; through these notches the steam passes to the underside of
the central plate 1 whilst the water with which it was mixed runs off at the lower
edges 10 into the bottom of the vessel 3. 12 is a perforated steam outlet pipe
supported below the plate 1 partly by the vessel 3 at 12ª and partly by a metal
strip 13.
14 is a return pipe through which the water in vessel 3 is returned to a
water chamber below and thence again to the pipes 9.
As will be obvious, the central plate 1 may be replaced by two curved plates
having their upper edges bent and arranged as indicated in dotted lines at 1º in Fig. 1
so as to be above the highest inlet openings for steam and water. The lower sides
or edges of these plates are, or may be, arranged similarly to those of the single
central plate 1 and side plates 2 shown in full lines. In some cases, as when
streams of steam and water are only introduced into the combined collector and
separator at one side thereof, only one set of overlapping plates 1 1 and 2 may be
used, arranged at one side of a vertical plane passing through the centre of the
combined collector and separator.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a steam generator of the kind herein referred to, a steam collector and
separator comprising a cylindrical vessel to the upper side of which steam
generating pipes are connected, and baffles or screens arranged opposite and below

page_text: the outlet ends of the said pipes and consisting of two or more curved plates
extending longitudinally within the upper part of the said vessel, these plates being
arranged a short distance apart and so as to partly overlap one another,
substantially as herein described for the purpose specified.
2. My improved steam collector and separator constructed substantially as
hereinbefore described with reference to and shown in the drawings annexed, or
modified as set forth.
Dated this 11th dor of July 1891
JOHN 1. THORNYCROFT.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.