Improvements in Aneroid Barometers.
Year: 1887

page_text: Date of Application, 24th Oct., 1887
Complete Specification Left, 24th July, 1888
Complete Specification Accepted, 24th Aug., 1888
PROVISIONAL SPECIFICATION.
Improvements in Aneroid Barometers.
HARRY WHITESIDE COOK of Brook Stondon-Massey in the County of Essex
Gentleman do hereby declare the nature of this invention to be as follows:-
My invention consists in so fixing an aneroid Barometer in its case, that it can be
turned round in the same, while 1 further adapt a scale & pointer to measure the
amount of angular displacement given to the Barometer, such scale being so marked,
that if at any known height, such pointer is adjusted to that height the angular
displacement of the barometer will correct the depression due to that height & the
needle of the instrument will give the pressure corrected to sea level-I also when
desired use two faces, one annular & attached to the case indicating as above discribed,
the pressure corrected to sea level, while the other revolves with the Barometer &
shows the actual pressure indicated by the Instrument.
H. WHITESIDE COOK,
Stondon Massey.

page_text: COMPLETE SPECIFICATION.
Improvements in Aneroid Barometers.
I, HARRY WHITESIDE COOK of Stondon Massey in the County of Essex Gentleman
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 object of this invention is to produce an Aneroid Barometer by means of which
the atmospheric pressure at any known height can be corrected to sea level the
instrument also serving to estimate actual altitudes without any calculation, and to
measure differences of altitude as with an ordinary mountain Barometer.
My invention consists in so fixing an Aneroid Barometer in its case that it is capable
of being turned round in the same, while I further adapt a pointer and scale, one
fixed to the case and the other revolving with the Barometer which between them
measure the amount of angular displacement given to the Barometer, such scale being
so measured off that if at any given and known height the pointer is made to point
to that height the angular displacement of the Barometer (with reference to the face)
will equal that angular displacement of the needle with reference to the Barometer,
which the fall of pressure due to such altitudes is calculated to produce in the
particular Aneroid Barometer to which the said scale is applied so that the needle of
the Barometer will give the pressure corrected to Sea-level.
I also when desired use two faces, one annular and attached to the case, indicating
as above described the pressure corrected to Sea-level, while the other revolves with
the Barometer and shows the actual pressure indicated by the instrument.
And in order that my invention may be more fully understood and carried into
practice I will now proceed to describe the same with reference to the accompanying
drawings in which similar letters indicate corresponding parts in both figures.
Figure 1 shows a view of an Aneroid Barometer fitted with my improvements
looking down upon the handle.
Fig. 2 shows a modification of my invention in which both barometric and altitude
scales are engraved upon the face.
In Figure 1 the pointer P1 is rigidly attached to the outer cylindrical case C
whilst the altitude scale S 1 is attached to or engraved on a lid or cover forming part
of the back B so that as the said lid or cover is revolved the Barometer being
attached to the back B will revolve also.
The said lid or cover is provided with an annular space in the hollow projection
shown at D D into which the end of the cylindrical case C or a portion or portions
of it is turned outwards so as to prevent the lid or cover from coming off.
At any given and known height the pointer P1 is revolved until it points to the
height as marked on the altitude scale S1 when the needle will give on the barometer
scale which is engraved on the face in the usual manner the barometric indication
corrected to Sea level.

page_text: Or at any unknown height if the instrument be rotated so that the needle occupies
its probable Sea-level position "Fair" "Rain" etc. according to the actual weather,
the pointer will indicate the approximate height upon the Scale S 1.
Figure 2 shows my improvement arranged with both scales upon the face, the
pointer P being rigidly attached to and revolving with the barometer K which may
conveniently be attached to a lid or cover forming part of the back of the instrument
as described with reference to Figure 1; this is indeed generally the handiest plan;
if preferred however the barometer may be fitted to rotate independently of the back
which may then be used to carry either the scale or the pointer.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is,
First. An Aneroid Barometer fitted so that it can be rotated in its case and
carrying round with it a properly marked altitude scale on which the heights are indi-
cated by a suitably placed pointer rigidly attached to the case face at back of the
instrument, substantially as and for the purpose herein before set forth.
2nd. An Aneroid Barometer carrying round with it a pointer indicating the heights
on a properly marked altitude scale suitably placed and rigidly attached to or engraved
on the case face or back of the instrument substantially as and for the purpose.herein
before set forth.