Improvements relating to Steam Whistles.
Year: 1894

page_text: Date of Application, 13th Nov., 1894-Accepted, 15th Dec., 1894
COMPLETE SPECIFICATION.
Improvements relating to Steam Whistles.
I, REGINALD HADDAN, of the Firm of Herbert Haddan and Co., of
18 Buckingham Street, Strand, W.C., London, Patent Agent, do hereby declare
the nature of this invention a communication to me from abroad by John
George Hermes, of Mount Vernon, N.Y., United States of America, Engineer,
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 this invention is to prevent a steam whistle from becoming clogged
or interfered with by water of condensation and the invention resides in the novel
features of construction set forth in the following Specification and claims and
illustrated in the annexed drawing in which-
Figure 1 is a sectional elevation of a circulating pipe.
Figure 2 is a section along 2 2 Fig. 1.
The circulating pipe comprises two pipes or branches which can be con-
veniently designated as the supply branch and the discharge branch. The supply
branch or pipe A communicates with a boiler and to this branch A is connected
a steam whistle F.
On opening a suitable valve the steam passes through pipe A to the whistle to
cause the latter to sound as well known.
When the whistle is not in use the steam entering pipe A passes thence through
the discharge branch or pipe D, so that the steam continually flowing through the
branches AD will not condense or cause any water to settle in or clog the supply
branch.
In order that the steam passing off through branch D will not be wasted, said
branch D may lead to any suitable part of the machinery, as for example to the
steam steering gear on a vessel or to a circulating pump.
By having the branch D housed in branch A the device is compact and at the
same time the steam circulating through branches A D will be protected against
excessive cooling.
By this arrangement the whistle will be supplied with dry steam, and will blow
instantly when the valve is opened, as no clogging can occur by reason of water
of condensation, and as the condensation is avoided no water of condensation will
be blown from the whistle over persons or objects in proximity to the whistle. As
the whistle does not become clogged, short blasts can be clearly or distinctly
produced by the whistle, and the waste caused by. the water of condensation in
non-circulating pipes is avoided.
A suitable jacket or non-conducting layer when placed about pipe A will tend
to prevent condensation or cooling. In addition to whistle F a branch tube with
a signal or siren may be applied.
Manifestly the pipe A could serve as a discharge pipe and the pipe D as an
entrance or service pipe according as it is found desirable to lead the steam in one
direction or another.
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. The combination with a steam whistle, of a steam supply pipe and a steam
discharge pipe in permanent and uninterrupted communication with each other
whereby a continuous circulation of steam is maintained through said pipes a branch

page_text: passage leading from said pipes to the whistle and a valve arranged in said branch
passage, substantially as described.
2. A circulating pipe for a steam whistle, said circulating pipe comprising a supply
branch, a discharge branch housed in the supply branch, in combination with a whistle
substantially as described.
R. HADDAN.