IMPROVEMENTS IN FOG-HORN APPARATUS
Year: 1881

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for an Invention of "IMPROVEMENTS IN FOG-HORN
APPARATUS." A communication from abroad by O. C. Hansen, of Skudes-
nacs, in the Kingdom of Norway.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 24th May 1881.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN FOG-HORN APPARATUS." A communication from abroad by O. C. Hansen, of
Skudesnaes, in the Kingdom of Norway.
The improvements consist in combining a fog-horn and blowing apparatus in a
box or case fitted with treadles or handles for actuating the bellows, or a pulley
over which a band may be passed and connected with a wheel driven by steam or
other power. The blowing apparatus consists of an air tight case or chamber
supplied with a trumpet, the interior of the case being divided into three compart-
ments, one for holding air adınitted through valves and serving to inflate the
bellows, the second acting as an air reservoir, and the third containing a supple-
mentary bellow compressed by two or more spiral-springs. The two bellows are
worked alternately and so a continuous sound is kept up. The horn is made of
brass, and the case and partitions of wood, the bellows in the ordinary way.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on
the 22nd November 1881.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN FOG-HORN-APPARATUS." A communication from abroad by O. C. Hansen, of
Skudesnaes, in the Kingdom of Norway.
This Invention relates to fog-horns or fog-signalling apparatus, and consists in
constructing fog-horns as follows, reference being had to the annexed Drawings,
in which Figs. 1 and 2 are sections, while Fig. 3 is an outside view of the
apparatus.
The apparatus consists of a hermetically closing case a, and a sonorous tube or
funnel b provided at the top with a tongue. The case a contains three chambers c, d, c.
The first chamber c into which the air enters through valves f (provided with
metal lids or plates) affords room for the motion of the aspirating bellows g, g'.
The second chamber d is an air reservoir, and the third one e contains another
bellows (operating bellows) which is compressed by two helical springs. Figure 2
shows the bellows g, g', in connection with the axle i which turns in two bearings.
On the bellows g, g', are mounted the bearings of the axles 7 and m, which are
connected with the cranks p and q of the axle i by means of pivots n, o. By this
arrangement the bellows are alternately filled and discharged while the handle k is
turned. The air entering through valves f into the chamber e is forced into
reservoir d. As this reservoir communicates with the apparatus h the air tends to
lift the bellows, while the springs oppose this tendency, and thereby a pressure of
about 50 lb. is produced which forces the air through the tube t into the trumpet
and gives a powerful signal.
CLAIM.
The construction of fog-horns consisting of a funnel or trumpet and of a case
which contains aspirating bellows, an air reservoir, and operating bellows actuated
by helical springs, the whole arranged and operating substantially as described and
illustrated.
In witness whereof, I, the said Herbert John Haddan, have hereunto set
my hand and seal, this Twenty second day of November, A.D. 1881.