IMPROVEMENTS IN MARINE FOG SIGNALS OR ALARUMS
Year: 1863

page_text: United States of America, at present residing at Aldersgate Street, in
the City of London, for the Invention of "IMPROVEMENTS IN MARINE FOG
SIGNALS OR ALARUMS."
Sealed the 13th May 1864, and dated the 24th November 1863.
PROVISIONAL SPECIFICATION left by the said Celadon Leeds Daboll at
the Office of the Commissioners of Patents, with his Petition, on the
24th November 1863.
I, CELADON LEEDS DABOLL, of New London, Connecticut, United States of
America, at present residing at Aldersgate Street, in the City of London, do
hereby declare the nature of the Invention for "IMPROVEMENTS IN MARINE
FOG SIGNALS OR ALARUMS," to be as follows:-
This Invention has for its object improvements in marine fog signals or
alarums.
For this purpose I use a trumpet, a whistle, or other suitable wind instru-
ment, and this I cause to sound at intervals by means of compressed air.
Air is forced by any suitable power (I believe a caloric or hot air engine to
be the best) into an tank or reservoir, and this by a pipe communicates with
the wind instrument, a valve being interposed which is actuated automatically
by the engine employed to compress the air; this is conveniently done by a
cam which is driven slowly and continuously by the engine, and the cam
actuates levers or instruments which open and close the valve. The form of

page_text: the cam and the speed at which it is driven regulate the time during which
the wind instrument is caused to sound and the intervals between the sounds.
It is not necessary that the condensing engine and apparatus should be placed
in the immediate locality of the trumpet or wind instrument, it may be at a
considerable distance therefrom, the compressed air being communicated by
a pipe which becomes part of the tank or air reservoir, and the valve being
worked from the distance by wires or rods.
The wind instrument I prefer to employ is a trumpet combined with a
reed or tongue. It is constructed in the following manner:-It consists of a
tube closed at one end, and at its other end it is expanded into a trumpet-
shaped mouth. The closed end of the tube enters the wind pipe or passage
to which the compressed air is admitted by the opening of the valve. The
tube has an opening in the side over which a tongue of steel plate or other
metal is fixed, the tube being flattened at the part and a ring being passed
over it, in the ring is a binding screw with a lock nut, and the binding screw
pressing down on a block piece clamps
block piece and the flat side of the tube.
is open, by striving to pass the tongue to
trumpet mouth, causes the tongue to vibrate and the trumpet to sound.
If desired, by suitable gearing from the condensing engine or otherwise I
cause the trumpet to move slowly whilst it is sounding, so as to direct its
mouth in succession in every direction in which it is desired that the sound
should be heard.
the end of the tongue between the
The compressed air when the valve
enter the tube and escape at the
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Celadon Leeds Daboll in the Great Seal Patent Office on the
19th May 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CELADON
LEEDS DABOLL, of New London, Connecticut, United States of America, at
present residing at Aldersgate Street, in the City of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of November, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Celadon Leeds Daboll, Her special licence that I, the said Celadon
Leeds Daboll, my executors, administrators, and assigns, or such others as I,
the said Celadon Leeds Daboll, my executors, administrators, and assigns, should

page_text: at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for "IM-
PROVEMENTS IN MARINE FOG SIGNALS OR ALARUMS," upon the condition (amongst
others) that I, the said Celadon Leeds Daboll, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Celadon Leeds Daboll, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in marine fog signals or
alarums.
For this purpose I use a trumpet, a whistle, or other suitable wind instru-
ment, and this I cause to sound at intervals by means of compressed air. Air
is forced by any suitable power (I believe a caloric or hot-air engine to be
the best) into a tank or reservoir, and this by a pipe communicates with the
wind instrument, a valve being interposed which is actuated automatically by
the engine employed to compress the air. This is conveniently done by a
cam which is driven slowly and continuously by the engine, and the cam
actuates levers or instruments which open and close the valve. The form of
the cam and the speed at which it is driven regulate the time during which
the wind instrument is caused to sound and the intervals between the sounds.
It is not necessary that the condensing engine and apparatus should be placed
in the immediate locality of the trumpet or wind instrument, it may be at a
considerable distance therefrom, the compressed air being communicated by a
pipe which becomes part of the tank or air reservoir and the valve being
worked from the distance by wires or rods.
The wind instrument I prefer to employ is a trumpet combined with a reed
or tongue. It is constructed in the following manner :-It consists of a tube
closed at one end and at its other end it is expanded into a trumpet-shaped
mouth. The closed end of the tube enters the wind pipe or passage to which
the compressed air is admitted by the opening of the valve. The tube has an
opening in the side over which a tongue of steel plate or other metal is fixed,
the tube being flattened at the part and a ring being passed over it. In the

page_text: Figure 1 is a side elevation of apparatus arranged according to my Invention.
a is the trumpet, which is caused to sound at intervals by means of compressed
air passing therethrough from a receiver b, into which it is compressed by any
suitable means, but that which I have found to answer consists of a caloric or
hot-air engine c, the piston rod d of which is connected with the piston of an
air pump e, which may be of the ordinary construction. The compressed air
is caused to escape at determined intervals through the trumpet a by the
opening and closing of a valve placed within the pipe a', communicating with
the tank or receiver b. This valve is opened and closed in the following
manner-Upon the shaft fare fixed cam surfaces f', which in their revo-
lution are caused to come in contact with the end of the rod g, and push that
rod in the direction of the trumpet a, thereby opening the valve in the pipe a¹,
to which it is connected. A spring or other suitable means causes the valve
to close on its seat immediately after one of the cam surfaces f¹ has ceased to
act on the end of the rod g. The cam surfaces f¹ have slow rotary motion
given to them from the main shaft or axis h of the engine by the tooth or pro-
jection h¹ thereon at each revolution of that axis taking into one of the teeth
of the ratchet wheel on the axis f, and the speed at which they are driven
may be regulated as desired. In the Drawing I have shewn the air-com-
pressing engine in the immediate vicinity of the trumpet a, but, if thought
desirable, it may be fixed at a considerable distance, and the compressed air
conveyed therefrom through suitable pipes to the trumpet a, the valve in the
pipe a¹ being worked by wires, rods, or other suitable means.
Figure 2 is a section of the wind instrument I prefer to employ. a is a
tube closed at the end a³, which enters the pipe a¹. This tube has an opening
in the side over which a tongue a' of steel plate or other metal is fixed. The

page_text: tube is flattened out at this part, and receives a ring provided with a
binding screw and lock nut, which, aided by the block piece as secures the
tongue a in position. The compressed air, when the valve is open, by
endeavouring to pass the tongue to enter the tube and escape at the trumpet
mouth, causes the tongue to vibrate and the trumpet to sound. The trumpet
may, by suitable mechanism, be caused to move slowly whilst sounding so as
to direct its mouth in succession in every direction in which it is desired that
the sound should be heard.
In witness whereof, I, the said Celadon Leeds Daboll, have hereunto set
my hand and seal, this Thirteenth day of April, in the year of our
Lord One thousand eight hundred and sixty-four.
CELADON L. DADOLL. (L.B.)