Improvements in Coffee-pots.
Year: 1890

page_text: Date of Application, 1st Jan., 1890
Complete Specification Left, 1st Nov., 1890-Accepted, 31st Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Coffee-pots.
GEORGE EDWARD CORY B.A. King's College Cambridge Demonstrator of
Chemistry in the University of Cambridge, do hereby declare the nature of this
invention to be as follows:-
:-
This invention has for its object improvements in coffee pots, whereby the height
of the liquid contained in the coffee pot may be readily ascertained without
separating the parts of the coffee pot.
The invention consists in providing the coffee pot with a vertical gauge placed
in such a position and of such a length that the maximum and minimum heights
of the liquid contained in the vessel may fall within the vertical limits of the gauge.
This gauge may consist of a flat strip of mica or well annealed glass or any trans-
parent medium capable of sustaining sudden changes of temperature without cracking
or breaking and may be placed and fastened behind a vertical slit, cut in the body
of the coffee pot, in such a manner, that the level of the liquid may be seen through
it and yet be water-tight.
In order to make the surface of the liquid more visable through the strip of mica,
a strip of some material having a white, metallic or reflecting surface is placed at a
very short distance behind the strip of mica on the inside of the coffee pot and so
fastened that the liquid may go between the strip of mica and reflecting surface.
Another way of rendering the surface of the liquid more visable is to let in the
light from the other side of the coffee pot through an aperture of suitable size and
shape and covered by mica.
Dated this First day of January 1890.
COMPLETE SPECIFICATION.
Improvements in Coffee-pots.
GEORGE EDWARD CORY B.A. King's College Cambridge Demonstrator of
Chemistry in the University of Cambridge 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.:--
This invention has for its object improvements in coffee pots whereby the height
of the liquid contained in the coffee pot may be readily ascertained without
separating the parts of the coffee pot.
The invention consists in providing the coffee pot with a vertical gauge placed in
such a position and of such length that the maximum and minimum height of the
liquid contained in the vessel may be ascertained. This gauge I prefer to consist
of a flat piece of mica, or glass or any transparent medium capable of sustaining
sudden changes of temperature without cracking or breaking and may be placed and
fastened behind a vertical slit cut in the body of the coffee pot, in such a manner
that the level of the liquid may be seen through it and yet be water-tight.
In order to make the surface of the liquid more visable through the strip of mica,
a strip of some suitable material such as tin, or other reflecting metal is placed at a
suitable distance behind the strip of mica and forms a reflecting surface.
Referring to the annexed drawings
Fig. 1 shews side elevation of the bottom part of a coffee pot A shewing slit or
aperture B, said slit or aperture being covered with strip of mica C on the inside.
I do not bind myself to the exact shape or position of the aperture.

page_text: 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 coffee pots the slit or aperture B covered with any suitable transparent material
with or without the addition of a reflecting surface at back thereof substantially as
described and for the purpose set forth.
Dated thin lut dow of November 1900
E. EATON,
Agent for Applicant.