Improvements in or connected with Cold Air Chambers.
Year: 1894

page_text: Date of Application, 11th Apr., 1894
Complete Specification Left, 11th Jan., 1895-Accepted, 16th Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Cold Air Chambers.
I, JAMES ANNEREAU, of Woodland Villa, Birkbeck Road, Enfield, in the
County of Middlesex, Cold Air Chamber Manufacturer, do hereby declare the
nature of this invention to be as follows:-
My invention relates to cold air chambers and has for its object to provide means
whereby a chamber of given capacity will require less ice to keep it cool than
heretofore.
According to my invention 1 arrange for introducing into the chamber at or
near the ice well a current of fresh air from the outside, and I exhaust air from
the chamber so that moisture shall be carried off and so be prevented from
condensing in the chamber.
.
The air inlet is placed near the top of the chamber and the air discharge
aperture near the bottom and in order that the air which enters the chamber shall
be as cool as possible I provide an air passage in contact with one or more of the
walls of the chamber.
Dated the 11th day of April 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury; London, Agents for the Applicant.
I, JAMES ANNEREAU, of Woodland Villa, Birkbeck Road, Enfield, in the
County of Middlesex, Cold Air Chamber Manufacturer, 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 :—
My invention relates to cold air-chambers.
In cold air-chambers as heretofore constructed it has frequently been the
practice to place ventilating apertures at the top and bottom of the chamber, and
in direct communication with the interior thereof, the result of which is that,
owing to the temperature of the air within the chamber being lower than that of
the external air the cold air, which naturally falls to the bottom of the chamber,
escapes through the lower aperture whilst the warmer external air enters through
the upper aperture and thereby causes a large consumption of ice.
Now the object of my invention is to provide means whereby the chamber may
be kept cold with a much smaller consumption of ice than heretofore and to this
end I arrange in conjunction with the air-discharge opening a passage as herein-
after described in such a manner that the escaping air is drawn from the top of the
cold air-chamber and not from the bottom as heretofore. In my Provisional
Specification I stated the reverse was the case, that is to say, that the described
passage served for the inlet of the air but this I now believe is not the case in
practice.

page_text: To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is a perspective view of a cold air-chamber having my improvements
applied thereto :
Figure 2 is a vertical section of the same.
a, a are the walls of the cold air-chamber which are constructed in any suitable
manner to render them as non-conducting as possible, and 6 is the door which
closes hermetically. c is the ice well within the chamber, the air-inlet, and e the
air-outlet.
is the passage which communicates with the exhaust aperture e, and g is a
passage which I advantageously arrange in conjunction with the inlet d in order to
direct the incoming air into the coolest part of the chamber. The inlet and
exhaust apertures d, e are preferably made flaring or broadened, so. that when
covered with perforated metal or wire-gauze the areas of the openings in such
perforated metal or gauze shall be equal to the areas of the passages.
As shewn, the inlet d is placed at the front of the chamber and connected with
the interior by means of a passage h extending over the top of the said chamber.
It is to be understood, however, that the said aperture d may be placed in any
other suitable position and communicate with the interior of the chamber at any
desired point.
The operation of the apparatus is as follows.-A quantity of ice being in the
ice well, the air in the chamber gradually becomes cool and, as the walls of the
passage become cold, the air in the said passage descends by gravity and escapes
through the aperture e, air to supply this place at the same time entering through
the aperture d, the said incoming air when the passage g is used entering the
chamber at the point where the air is coldest.
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 :-
1. A cold air-chamber having arranged in conjunction with the air-discharge
aperture a passage extending to near the top of the said chamber substantially as,
and for the purpose, described.
2. In a cold air-chamber having an air-passage arranged in conjunction with
the air-discharge aperture as described in the preceding claiming clause, a similar
passage arranged in conjunction with the air-inlet, substantially as described.
Dated this 11th day of January 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.