Improvements in Cold Store-rooms.
Year: 1889

page_text: Date of Application, 29th Nov., 1889
Complete Specification Left, 21st Aug., 1890-Accepted, 29th Nov., 1890
Improvements in Cold Store-rooms.
I, LOFTUS PERKINS of 6 Seaford Street Gray's Inn Road, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention to be as follows:-
Store rooms for preserving frozen meat as now constructed have a thick lagging
of felt or like material placed over the inner face of the walls and roof of the
room and over this a lining of sheet metal made as far as practicable impervious to
air. With store rooms so constructed the lagging of felt or other material after a
lapse of 2 or 3 years becomes saturated and sodden with moisture and its power
of resisting the conductors of heat is destroyed. This is owing to the outer walls and
roof of the building being more or less pervious to air. The outer air laden with
moisture percolates through to the colder lagging and the moisture is deposited upon
the lagging and accumulating continuously ultimately saturates it completely and
destroys its efficiency.
In small store rooms or boxes the lagging is enclosed both externally and
internally with a casing of sheet metal made perfectly impervious to air and with
such constructions the lagging remains unimpaired but for store rooms of large size it
is difficult if not impracticable to make the exterior walls and roof absolutely
impervious to air.
According to my invention in place of applying the lagging directly to the inner
face of the walls of the room I line the inner face of the walls and the floor and roof
with a lining of sheet metal impervious to air or as nearly so as is practicable and
over the interior of this I place the lagging leaving the inner face of the lagging
exposed to the interior of the room without any air tight lining over it and using
battens only at distances apart to hold the lagging to the metal casing. Above the
lagging which is over the bottom of the room I support a floor leaving an air space
between the floor and the lagging so that the air in the room may circulate below
the floor.
With this construction the lagging can be kept perfectly dry as any small amount
of moisture passing to the lagging through the outer metal casing would evaporate
from it into the room and be deposited at the coldest part or if any large leakage of
air through the metal casing took place and the lagging over the part of the casing
where such leaking was taking place became sodden, this would quickly be detected
and such sodden portion of the lagging could be removed and the defect in the casing
made good.
Dated this 20th day of November 1980
COMPLETE SPECIFICATION.
Improvements in Cold Store-rooms.
I, LOFTUS PERKINS, of 6 Seaford Street, Gray's Inn Road, in the County of Middlesex,
Engineer, 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:
Store rooms for preserving frozen meat as now constructed have a thick lagging of
felt or like material placed over the inner face of the walls and roof of the room and
over this a lining of sheet metal made as far as practicable impervious to air..

page_text: With store rooms so constructed with a sheet metal lining within the lagging, the
lagging of felt or other material after a lapse of 2 or 3 years becomes saturated and
sodden with moisture and its power of resisting the conduction of heat is destroyed.
This is owing to the outer walls and roof of the building being more or less pervious
to air. The outer air laden with moisture percolates through to the colder lagging
and the moisture is deposited upon the lagging and accumulating continuously
ultimately saturates it completely and destroys its efficiency.
In small store rooms or boxes the lagging is enclosed both externally and internally
with a casing of sheet metal made perfectly impervious to air and with such con-
structions the lagging remains unimpaired but for store rooms of large size it is
difficult if not impracticable to make the exterior walls and roof absolutely impervious
to air.
According to my invention I place the lagging within a sheet metal casing and
I allow any air which may leak through the casing free access to the interior of
the room.
I proceed as follows. I line the inner face of the walls and the floor
and roof with a lining of sheet metal impervious to air or as nearly so as is
practicable and over the interior of this I place the lagging leaving the inner face
of the lagging exposed to the interior of the room without any air tight lining
over it and using battens only at distances apart to hold the lagging to the metal
casing. Above the lagging which is over the bottom of the room I support a floor
leaving an air space between the floor and the lagging so that the air in the room
may circulate below the floor.
Figure 1 of the drawing annexed is a vertical section and Figure 2 a horizontal
section of part of a cold store room constructed in the above manner.
A is an air tight metallic casing within a chamber the walls of which are not shown.
B non-conducting material placed on the inside of the casing. CC wooden uprights
by which the side walls of non-conducting material are kept in place and which also
serve to carry the roof. The top of the store room is formed of wooden beams D
crossing one another and boarded externally to carry the top of the metallic casing
whilst on the interior it has battens Dx nailed to it to support the non-conducting
material which is placed between the beams D. The bottom of the cold store room is
formed in the same way as the top of wooden beams E crossing one another and above
the lagging or non-conducting material which is placed between the beams is a wooden
flooring F with an air space Ġ between the non-conducting material and the bottom
of the floor.
The air tight metallic casing of the store room may either be close up to the outer
walls or it might be at a distance from the walls.
The interior of the store room may be kept cool in any ordinary way either by cold
fluid passed through pipes supported at the upper part of the room or by the expansion
of compressed cold air or in other ways.
With this construction of store room the lagging of non-conducting material can be
kept perfectly dry as any small amount of moisture passing to the lagging through
the outer metal casing would evaporate from it into the room and be deposited at the
coldest part or if any large leakage of air through the metal casing took place and the
lagging over the part of the casing where such leaking was taking place became
sodden, this would quickly be detected and such sodden portion of the lagging could
be removed and the defect in the casing made good.
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 store room surrounded externally with an air tight metallic casing and
with non-conducting material held against the inner sides of the casing by openwork
supports so that the inner face of the non-conducting material is exposed to the
interior of the room.
2. The combination of the outer air tight metallic casing A the lining B of non-

page_text: conducting material-the openwork frame of wood CD D× for maintaining in place
the lining at the sides and top and the floor F above the lining at the bottom with air
space G between the floor and the lining.
LOFTUS PERKINS.