IMPROVEMENTS IN VENTILATORS FOR BUILDINGS, VESSELS, AND VEHICLES
Year: 1877

page_text: "
LETTERS PATENT to Charles Henry Addyman, of Leeds, in the County of
York, for the Invention of IMPROVEMENTS IN VENTILATORS FOR BUILDINGS,
VESSELS, AND VEHICLES." A communication from abroad by Thomas William
Bracher, of the City and State of New York, United States of America.
Sealed the 27th October 1877, and dated the 5th May 1877.
PROVISIONAL SPECIFICATION left by the said Charles Henry Addyman
at the Office of the Commissioners of Patents on the 5th May 1877.
CHARLES HENRY ADDYMAN, of Leeds, in the County of York. "IMPROVEMENTS-
IN VENTILATORS FOR BUILDINGS, VESSELS, AND VEHICLES." (A communicaton from
abroad by Thomas William Bracher, of the City and State of New York, United
States of America.)
This Invention consists in the employment for ventilating purposes of a fabric
composed of wire gauze and a fibrous filtering material, being either interwoven'
with the wire, or both being woven separately, and afterwards connected by any
suitable means.
With this ventilating fabric is also combined a frame, so balanced that it opens
and closes automatically, as required, by the nature of the atmosphere inside and
outside of the ventilator.
This ventilating fabric is also combined with a hinged frame and with a deflector,
so that by opening or closing the hinged frame the ventilation is controlled.
Another application of my ventilating fabric refers to a frame, in which is firmly
secured a sheet of wire gauze or perforated sheet metal, and which forms the guides
for a roller, on which is wound a curtain of fibrous material, the roller being so
arranged that by moving it in one direction the curtain unwinds; and by moving
it in the opposite direction, is wound up, and thereby the ventilation is controlled.
By combining wire gauze or perforated sheet metal with a fibrous material in a
ventilator, the air passing through it is filtered, and the noxious atmospheric dust is
retained.

page_text: ventilating fabric. When the frame e is opened, the external air enters, as shewn
by arrows, Figure 2.
Figure 3 shews a stationary frame f, which may be secured in the upper or lower
portion of a room, cabin, railway carriage, or other vehicle requiring to be ventilated.
The frame contains a sheet g of wire gauze and a roller h on which is wound a
curtain of fibrous material. By revolving the roller in one direction, the curtain
is unrolled and caused to cover the wire gauze; and by revolving the roller in the
opposite direction, the curtain is wound up, and the wire gauze uncovered. By
combining wire gauze and perforated sheet metal with a fibrous material in a
ventilator, the air passing through is filtered, and the noxious vapours and
atmospheric dust retained or prevented from passing into the room or other
apartment.
The material may contain some disinfectant when used for sick rooms or hospitals,
or such places where infectious diseases are, or for closets or other places liable to be
tainted with noxious atmosphere or vapours.
Having now described the nature of the said Invention for "Improvements in
Ventilators for Buildings, Vessels, and Vehicles," and shewn by Drawings how the
same may be carried into practice, I would have it understood that I do not limit
myself to the exact limits, details, or configuration of the parts herein explained
and shewn, as the same may of course be varied or modified without in any way
departing from the Invention, but what I do claim and desire to be secured to me
by Letters Patent is,―
First. The application of woven fabric consisting of cotton, wool, or other fibrous
substances, in combination with wire gauze or perforated sheet metal for the
purposes of filtering the air as it passes through into rooms, cabins, railway
carriages, or other vehicles, substantially as and for the purposes herein set forth
and shewn at Figures 1, 2, and 3.
Second. The combination of the various parts forming the apparatus, substantially
as herein set forth and shewn at Figures 1, 2, and 3.
In witness whereof, I, the said Charles Henry Addyman, have hereunto set
my hand and seal, this Twenty-sixth day of October, in the year of our
Lord One thousand eight hundred and seventy-seven.
Witness to the signature of the
said Charles Henry Addyman,
WM. FAIRBURN HART,
Messrs. A. R. & J. W. Harding,
Engineers and Patent Agents,
2, East Parade,
Leeds,
C. H. ADDYMAN. (LS.)