Improvements in Drying Rooms or Closets for Drying Linen or other Textile Goods or Clothing.
Year: 1897

page_text: Date of Application, 30th Jan., 1897
Complete Specification Left, 29th Oct., 1897-Accepted, 18th Dec., 1897
PROVISIONAL SPECIFICATION.
Improvements in Drying Rooms or Closets for Drying Linen or other
Textile Goods or Clothing.
We, ISAAC BRAITHWAITE and EDWARD O'BRIEN of the firm of Isaac Braithwaite
and Son of Kendal in the County of Westmoreland, Merchants and engineers do
hereby declare the nature of this invention to be as follows:
-
This invention is designed to provide for the heating of fresh air introduced into
drying rooms or closets for drying or airing articles of clothing linen or other
textile goods by means of the exhaust or moist air without unduly cooling or lowering
the drying closet or consuming fuel in heating the fresh air inlet.
In carrying out the invention we cause the heated air and vapour from the drying
room or closet to pass along a duct or passage separated from the inlet air duct or
passage by a thin wall or partition of sheet metal.
The apparatus is preferably built up of a number of sheets of metal-preferably
thin sheets of copper-placed in zigzag or other form to give an increased surface
with a connecting plate of cast iron or other suitable material top and bottom to hold
the sheet metal walls in position and divide the passages.
We prefer also to arrange the inlet and outlet passages so that the hot air and
vapour from the drying closet will pass in one direction along the thin metal the
fresh air being passed in the opposite firection along the other side of it.
The air is drawn out or forced in by means of a fan.
1
1005
WM. P. THOMPSON & Co.
6, Bank Street, Manchester, Patent Agents.
Improvements in Drying Rooms or Closets for Drying Linen or other
Textile Goods or Clothing.
We, ISAAC BRAITHWAITE and 'EDWARD O'BRIEN, of the firm of Isaac Braithwaite
and Son, of Kendal, in the County of Westmoreland, Merchants and Engineers, 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 invention is designed to provide for the heating of a current of fresh air,
introduced into drying rooms or closets in which articles of clothing, linen or other
textile goods are dried or aired, by utilizing therefor the exhaust or moist air

page_text: another.
The invention consists essentially in an apparatus or chamber comprising a number
of compartments cr passages, built up of or separated by a number of sheets of thin
metal, of zig-zag or similar form to give an increased surface, the heated waste or
exhaust air or vapour, passing along one set of compartments or passages in one
direction, and the incoming cool or fresh air passing along the intermediate passages.
The invention will be fully described with reference to the accompanying
drawings.
Fig 1. Perspective view of apparatus.
Fig 2. Perspective view of single division plate.
Fig 3. Transverse section on line x-y.
Fig 4. Perspective view of a single frame of which the apparatus is built up.
The apparatus is constructed or built up of a number of frames A such as shown in
Fig 4, and a number of thin sheets D of copper bent into a prolonged zig-zag form
to fit into the corresponding indents a in the frame A.
Each of the frames A is constructed of the side pieces a', and the top and bottom
pieces a¹ and each side may comprise two or more lengths of the pieces a¹ to give the
required size of frame. The side pieces a' are provided with lugs (not shown in the
drawings) through which bolts are passed to bind the apparatus together when
completed.
The top and bottom end pieces all of the frames are provided with apertures or
slots b through which a current of air can pass in either direction as directed.
The front and back of the, apparatus are formed of plates or boards B preferably of
cast iron, secured together by bolts passing across through lugs in them and in the
frame sides a¹. The back and front plates may, if desired, have a zig-zag rim cast
along two edges.
In building up the apparatus the back or front plate is laid flat and the first of the
frames A is laid upon it (this frame being zig-zag at one side only) upon this is then
laid one of the zig-zag copper sheets D, and upon the copper sheet another frame,
and so on alternately, until an apparatus of the desired size is constructed, the parts
being then all secured together by bolts passing through lugs or holes formed
therein.
The end piece all of the frames A are kept in place by folding the end of one of the
copper sheets D around or over each, the copper sheet being then cut away where it
covers the aperture 6 so as to allow the air to pass.
The inlet and outlet passages are preferably arranged so that the waste or exhaust
hot air or vapour (from the drying closet or other source) will flow in one direction,
while the fresh air will pass in the opposite direction, but the two currents may flow
in the same direction if desired, or found more convenient.
The air may be drawn or forced in either direction by means of a fan.
The invention is primarily intended for application to the drying closets employed
in laundries, but may also be employed to heat fresh air for other ventilating or other
purposes, by means of the waste steam and heat arising in wash houses, dye houses
and the like, or other waste heat or steam, mixed with air.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what we
claim is
1. An appliance for heating a current of fresh air by means of a warm or hot
current of waste or exhaust air or vapour, constructed with a number of alternating
passages or compartments, separated by partitions of thin zig-zag or deeply corrugated
sheets of metal, substantially as described.

page_text: 2. The apparatus for heating a current of fresh air for drying or ventilating
purposes by means of the waste or exhanst heat or vapour arising from drying closets,
dye houses, wash houses or other sources substantially as described, and shown.
Dated this 6th day of October, 1897.
WM. P. THOMPSON & Co.,
Manchester, Liverpool & London, Patent Agents.