Fog Horn or Marine Signalling Device.
Year: 1893

page_text: Date of Application, 17th June, 1893-Accepted, 4th Nov., 1893
I
⚫ COMPLETE SPECIFICATION.
Fog Horn or Marine Signalling Device.
JOHN SPEIRS, Shipbuilder, 11 Zabriskie Street, Jersey City, State of New
Jersey, United States of America, do hereby declare the nature of my invention.
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
My invention relates to improvement in marine signalling device of which the
following is a Specification, and the object of my invention being in general to
provide a horn or signal device which will not choke, and which will operate
and be effective under any and all pressure. A further object of my invention is to
provide the necessary mechanism to operate said horn and signalling device, and I
attain this object by the mechanism illustrated in the accompanying drawing, in
which-
1.
Figure 1 is a front elevation showing the upper part of the horn, the tank, pump,
flywheel, and crank-handle.
Figure 2 is a side elevation showing the horn, valve, pressure gauge etc.
Figure 3 is a detail sketch of the lower part of the horn, showing the tongue or
reed in the horu and the equalizer.
Figure 4 is a cross section of the equalizer.
Figure 5 is a plan view of the valve at the lower end of the horn.
The tank, 10, in Figures 1 and 2, is provided with legs, 50, and at the upper end
is securely fastened to the air pump, 11. To the air pump, 11, is a projection or
arm, 13, which has a hole in it at the upper end, and which receives and supports
the pump piston, 12. The hole is a little larger than the piston, and allows the
piston to pass up and down freely.
On the piston is a lug, 26, which forms a part of the link, 14, and is securely
fastened to the piston by pin, 19.
In the link, 14, is a sliding block, 15, which is connected to the disk, 17; the
disk, 17, is securely fastened to the flywheel, 18, and the flywheel is connected to
the shaft, 20, which revolves in the journal in the upper part of the standard, 24;
on the end of the shaft,, 20, is a crank or lever, 21, with handle, 22.
The handle, 22, when turned in either direction, will force the pump piston up
and down, and create any desired pressure in the tank, 10.
Tank, 10, is provided with a gauge, 35, to register the pressure on the inside.of
the tank.
The pump, 11, is provided with a pipe, 30, and valve, 31, to convey the air from
the pump to the tank.
In the drawing, Figure 3, the end of the horn, 40, is provided with a cap, 61,
which is screwed into the thimble, 60; between the cap, 61, and the thimble, 60.
is a washer or packing, 62. The end of the horn, 63, is provided with a reed or
tongue, 64.
Carried by the horn, 40, and just above the tongue or reed, 64, is a cap, 61,
adapted to be secured into the thimble or screw socket, 60, which is fastened into
the upper end of the equalizing chamber 41. A washer or packing, 62, is used to
keep the joint between the cap, 61, and the thimble, 60, air tight. The equalizing
chamber, 41, is formed of the two hollow cone shaped sections, 65 and 66, fastened
together at the larger ends, so as to form a chamber of the shape shown in Figure 3.
The section 65, has fastened into its smaller end the thimble or screw-socket, 60,
and the section 66 carries at its lower and smaller end the air inlet pipe, 67.
In the lower part of the chamber 41, is secured the equalizer 68, and fastened to
the sides of said chamber by bands, 69.
The equalizer is cone shaped. The object of said equalizer is to so equalize and

page_text: spread the volume of air entering the chamber, 41, from the air inlet pipe, 67,
and so prevent any possibility of the reed or tongue 64, sticking to the end of the
horn, 63.
Were it not for this equalizer the reed or tongue, 64, would immediately become
rigid, and fail to operate as soon as a pressure of 10 pounds or more was reached.
In the drawings Fig. 5, the valve 43, is provided with a lever 47, and said lever
is provided with a spring, 44, which is attached to the tank 10, and said spring is
for the purpose of keeping the valve closed when it is necessary to operate the horn,
the upper end of the lever, 47, is pressed toward the tank, 10, which causes the
valve to open and allow the air from the tank, to pass through pipe, 67, and from
thence to equalizing chamber, 41, and from thence into the horu.
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 :
Claim I. In a signalling device the combination with a horn of an equalizing
chamber from the mouthpiece of the horn, and containing a cone shaped equalizer
as substantially shown and described.
Claim II. In a signalling device the combination of a cone shaped chamber and
a cone shaped equalizer, and curved rectangular bands connecting and supporting
said cone shaped equalizer within the walls of said cone shaped chamber as sub-
stantially shown and described.
Claim III. In a signalling device the combination of a horn to be used in
combination with a cone shaped chamber, and a cone shaped equalizer as substan-
tially shown and described.
Claim IV. In a signalling device the combination of a horn, 40, equalizing
chamber, 41, operating valve, 43, air tank, 10, air pump, 11, with registering
gauge, 35, and mechanism for operating said air pump as substantially shown and
described.
Signed, at the City of Brooklyn, in the County of Kings and the State of
New York, this 2nd of March A.D. 1893.
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