AN IMPROVED CASE FOR. ANEROID BAROMETERS FOR MARINE PURPOSES
Year: 1860

page_text: LETTERS PATENT to Frederick Henry Elliott, of the Strand, in tho
County of Middlesex, Mathematical Instrument Maker, for the Invention
of "AN IMPROVED CASE FOR. ANEROID BAROMETERS FOR MARINE PURPOSES."
Sealed the 23rd April 1861, and dated the 27th October 1860.
PROVISIONAL SPECIFICATION left by the said Frederick Henry Elliott
at the Office of the Commissioners of Patents, with his Petition, on
the 27th October 1860.
I, FREDERICK HENRY ELLIOTT, of the Strand, in the County of Middlesex,
Mathematical Instrument Maker, do hereby declare the nature of the said
Invention for "AN IMPROVED CASE FOR ANEROID BAROMETERS FOR MARINE.
PURPOSES," to be as follows:-
My improved case consists of a fixed cover with a portion thereof cut out
or removed over a portion of the scale on the dial, and of a moveable cover.
with a similar portion also cut out or removed. A circular aperture is made
in the centre of the moveable cover, in which a plate with a tail-piece of no
greater thickness than that of the metal of which the moveable cover is formed
is free to turn; an index or pointer is connected to this plate, and by turning
the tail-piece the index can be set and moved as required. The side of the
moveablo cover is slotted, to enable it to be turned over screws or studs, and
over the fixed cover. When the moveable portion is so turned as to expose

page_text: the portions removed from both covers, so much of the scale on the dial as is
requisite is exposed to view; when the moveable cover is turned partially
round the aperture in the fixed cover is closed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Henry Elliott in the Great Seal Patent Office on
the 27th April 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
HENRY ELLIOTT, of the Strand, in the County of Middlesex, Mathematical
Instrument Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of October, in the year of our
Lord One thousand eight hundred and sixty, in the twenty-fourth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Frederick Henry Elliott, Her special licence that I, the said
Frederick Henry Elliott, my executors, administrators, and assigns, or such
others as I, the said Frederick Henry Elliott, my executors, administrators,
and assigns, should 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 "AN IMPROVED CASE FOR ANEROID BAROMETERS FOR MARINE
PURPOSES," upon the condition (amongst others) that I, the said Frederick
Henry Elliott, my executors, or administrators, 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
Scal Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Frederick Henry Elliott, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say:―
My improved case consists of a fixed cover with a portion thereof cut out
or removed over a portion of the scale on the dial, and of a moveable cover
with a similar portion also cut out or removed. A circular aperture is made in

page_text: the centre of the moveable cover, in which a plate with a tail-piece of no
greater thickness than that of the metal of which the moveable cover is formed
is free to turn; an index or pointer is connected to this plate, and by turning
the tail-piece the index can be set and moved as required. The side of the
moveable cover is slotted to enable it to be turned over screws or studs and
over the fixed cover. When the moveable cover is so turned as to expose the
portions removed from both covers, so much of the scale on the dial as is
requisite is exposed to view; when the moveable cover is turned partially round
the aperture in the fixed cover is closed.
Figure 1 of the accompanying Drawings is a side elevation of an aneroid
barometer fitted with a case made according to my Invention; Figure 2 is a
plan of the same, showing the scale protected by the movable cover; and
Figure 3 is a plan, showing the movable cover turned to expose the scale
to view.
a is the fixed cover, having the portion from 6 to c cut out; d is the movable
cover; e is the plate with tail-piece f, fitted in a circular recess sunk in the
central part of the movable cover; g is the pointer fitted to the plate e; his
the portion of the scale comprised between the parts b, c; i, i, are the slots
formed in the side of the movable cover; k, k, are the screws or studs screwed
to or fitted in the side of the fixed cover, over which the movable cover is free
to travel; is a lug made with a hole m, made to slide at the back of the
case for the purpose of hanging up the barometer when required. For
carrying in the pocket the lug is pushed inwards, as shewn by the dotted lines.
Although I prefer the case and cover to be made of metal, yet they may be
made of wood or other suitable material.
And having now described the nature of my said Invention and in what
manner the same is to be performed, I declare that I claim, the improved case
for aneroid barometers for marine purposes, constructed substantially in
manner herein-before described and illustrated in the accompanying Drawings.
In witness whereof, I, the said Frederick Henry Elliott, have hereunto
hand and scal, this Twenty-sixth day of April, One thousand
eight hundred and sixty-one.
set my
FREDERICK HENRY ELLIOTT. (LS.)