Year: 1888

page_text: Date of Application, 14th Nov., 1888
Complete Specification Left, 13th Apr., 1889
Complete Specification Accepted, 18th May, 1889
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I, LUIGI COMITTI of 19 Warner Street, Clerkenwell, in the County of Middlesex,
Barometer Maker, do hereby declare the nature of this invention to be as follows:-
The invention relates to the dial and "lining" of Aneroid Barometers.
Heretofore, in some cases the dial has been made of translucent or clear glass, with
the divisions, figures, and other indications, painted or printed thereon, and the
"lining" has been made of porcelain, and of the same diameter, or thereabouts, as
the dial, to act as a background or reflector to the clear glass. dial, and thereby
facilitate the reading thereof.
In other cases a porcelain dial has been used with a smaller metal "lining," which
has been employed merely to enclose the works of the barometer.
Now, according to my invention, I form both the dial and the "lining" in one
piece of porcelain, thereby producing a neat appearance. In carrying my invention
into effect, I form the dial, as usual, with a large central aperture, and I preferably
make the "lining" to start from the inner edge of the dial with a curve and to
extend a sufficient distance to enclose the barometer. These parts are fitted in a wood
or other case, as usual, and I enclose or cover the dial with a sheet of clear glass,
through the centre of which the axis of the index hand is passed.
By this latter arrangement, should the outer glass cover be broken, it can readily
be replaced at a small cost, as the dial is entirely independent thereof and would
remain uninjured.
Dated this 14th day of November 1888
LUIGI COMITTI.
By Harris & Mills,
23, Southampton Buildings,
Agents.

page_text: Improvements in Aneroid Barometers.
I, LUIGI COMITTI of 19 Warner Street, Clerkenwell, in the County of Middlesex,
Barometer 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 the dial and "lining" of aneroid barometers.
Heretofore, in some cases, the dial has been made of translucent or clear glass, with
the divisions, figures and other indications, painted or printed thereon, and the upper
"lining" has been made of porcelain, and of the same diameter or thereabouts as the
dial, to act as a background or reflector to the clear glass dial, and thereby facilitate
the reading thereof.
In other cases a porcelain dial has been used with a smaller metal "lining," which
has been employed merely to surround and enclose the works of the barometer.
Now, according to my invention, I form both the dial and the "lining" in one
piece of porcelain, thereby producing a neat appearance. In carrying my invention
into effect, I form the dial, as usual, with a large central aperture, and I preferably
make the lining to start from the inner edge of the dial with a curve, and to extend a
sufficient distance to surround and enclose the barometer. These parts are fitted in a
wood or other case as usual, and I enclose or cover the dial with a sheet of clear glass,
through the centre of which, the axis of the index hand is passed.
By this latter arrangement, should the outer glass cover be broken, it can readily
he replaced at a small cost, as the dial is entirely independent thereof, and would
remain uninjured.
And in order that my said invention may be more clearly understood, and readily
carried into effect, I will proceed, aided by the accompanying drawings, more fully to
describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan and Figure 2 is a section of parts of an aneroid barometer with
my invention applied thereto. In both of these figures, the hands or pointers are
shown, but the barometer movement is omitted. a represents the frame of the
barometer, the metal plate on which the barometer movement is mounted, c the
barometer hand or pointer, d the recording hand or pointer, which is mounted in
the centre of a sheet of clear glass e, mounted in the bezil f g is the dial, on which
the divisions and indications are printed or otherwise indicated, and y' is the "lining"
which surrounds the barometer movement, and is connected to the dial g by a small
curve g².
According to my invention, I form the dial y and lining g' in one piece of porcelain
or pottery, which may be all of one color, preferably white or ivory, or the dial g may
be of white or ivory color and the lining g' may be coated with gold or silver, so as to
imitate the metal linings ordinarily used.

page_text: The form of the dial and lining may be somewhat modified without departing from
the nature of my invention.
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:
In aneroid barometers provided with visible movement, the combination therewith
of a dial and lining formed of one piece of porcelain or pottery, substantially as herein
shown and described.
Dated this 13th day of April 1889.
LUIGI COMITTI.
By Harris & Mills,
23, Southampton Buildings, London,
Agents.