Improvements in Aneroid Barometers.
Year: 1892

page_text: Date of Application, 28th June, 1892
Complete Specification Left. 17th Mar.. 1893-Accepted. 22nd Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Aneroid Barometers.
I, LUIGI COMITTI of 69 Mount Pleasant in the County of Middlesex, Scientific
Instrument Maker, do hereby declare the nature of this invention to be as
follows:-
The invention relates to that class of aneroid barometer which is provided with
a dial having the divisions showing the air pressure on one half of the circum-
ference and the weather forecast divisions on the other half thereof and in which
the barometer is provided with a double ended index, hand or pointer one end of
which points to the one set of divisions and the other end to the other set thereof
and my invention consists in the combination with such class of barometer of a
double ended registering hand or pointer which points to both sets of divisions and
thereby enables the former air pressure and weather forecast to be both read with
accuracy.
LUIGI COMITTI,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Aneroid Barometers.
1, LUIGI COMITTI of 69, Mount Pleasant in the County of Middlesex, Scientific
Instrument Maker, 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 :—
The invention relates to that class of aneroid barometer which is provided with
a dial having the divisions showing the air pressure on one half of the circum-
ference and the weather forecast divisions on the other half thereof and in which
the barometer is provided with a double ended index hand or pointer one end of
which points to the one set of divisions and the other end to the other set thereof
and my invention consists in the combination with such class of barometer of a
double ended registering hand or pointer which points to both sets of divisions and
thereby enables the former air pressure and weather forecast to be both read with
accuracy.
My invention is illustrated in the accompanying drawing which represents a face
view of an aneroid barometer.
The divisions showing the air pressure are on the left of the dial, those for the
weather forecast are on the right and a double end index hand or pointer a is used
to point to corresponding divisions on a diametric line as is well understood.
Instead however of having only a single ended registering hand or pointer as
heretofore I combine with such instrument a double ended registering hand or
pointer which points to both sets of divisious on the dial and thereby enables a
former air pressure and weather forecast to be both read with accuracy for
comparison with either a previous or a later indication.
my
Having now particularly described and ascertained the nature of said
invention and in what manner the same is to be performed I declare that what
I claim is :-
In aneroid barometers having a dial provided with divisions on one half thereof

page_text: indicating air pressures, corresponding divisions on the other half indicating weather
forecasts, and a double ended index hand or pointer pointing to corresponding
divisions on both halves of the dial the combination therewith of a double ended
registering band or pointer substantially as herein shown and described and for the
purpose stated.
'CCOL TO TILTA
one
LUIGI COMITTI,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.