Year: 1886

page_text: Date of Application, 28th Oct., 1886.
Complete Left, 20th July, 1887.
Complete Accepted, 23rd Aug., 1887,
I HERBERT DURELL TERRY, of Stobhill, Morpeth in the County of Northumber-
land, Captain in the Army and Chief Constable of Northumberland, do hereby declare
the nature of this invention to be as follows:-
My invention relates to a ventilator particularly applicable to the ventilation of
poultry houses, but which may be applied to the ventilation of other erections or
chambers in which it is desired to obtain ventilation while preserving heat generated
therein and avoiding draught upon the birds or animals or even persons within it.
The usual mode of ventilating a fowl house or building is to open one ventilating
shutter or window and close another according to the direction of the wind; or to
keep two ventilators continually open, one at the top and the other at the bottom; or
to keep two windows open, thereby creating a thorough draft.
My invention consists in fitting within the upper part or roof of the fowl house a
horizontal tube, traversing a portion of the roof of the house inside and passing to the
outside where it is elbowed near each extremity and provided with a wide or bell
mouthed opening. The part of the tube within the house is perforated on its under-
side, and I prefer to make the outer ends movable so that they may be turned on the
main tube, the one to face the prevailing wind, the other in the opposite direction, or
as may be desired. The tube is stopped in the centre, so as to force the air at once
into the house, and so as not to interfere with the passage of the foul air on its
way out.
Thus a current, or currents, of air entering the tube, at one end is directed by the
bend or elbow to the nearest perforations in the horizontal part of the tube, passing
through which it meets the hot foul air generated within the closed fowl house and
causes it to pass through the further perforations of the tube and so to the outside of
the house; a continuous circulation of air being thus obtained within the house, the
birds being however not in draught and kept perfectly warm in the coldest weather.
The tube, or tubes, may be of zinc, or any suitable material, of any required
dimensions, and be fitted in the most convenient manner.
Dated this Trente sighth day of October 1886

page_text: COMPLETE SPECIFICATION.
An Improved Ventilator for Poultry Houses and other Buildings.
I, HERBERT DURELL TERRY, of Stobhill, Morpeth in the County of Northumber-
land, Captain in the Army, and Chief Constable of Northumberland, 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 a ventilator particularly applicable to the ventilation of
poultry houses, but which may be applied to the ventilation of other erections or
chambers in which it is desired to obtain ventilation while preserving heat generated
therein and avoiding draught upon the birds or animals, or even persons within it.
The usual mode of ventilating a fowl house or building is to open one ventilating
shutter or window and close another according to the direction of the wind; or to
keep two ventilators continually open, one at the top and the other at the bottom; or
to keep two windows open; thereby creating a thorough draft.
My invention consists in fitting within the upper part or roof of the fowl house a
horizontal tube, traversing a portion of the roof of the house inside, and passing to the
outside where it is elbowed near each extremity and provided with a wide or bell
mouth opening. The part of the tube within the house is perforated on its under side,
and I prefer to make the outer ends movable so that they may be turned on the main
tube, the one to face the prevailing wind, the other in the opposite direction, or as
may be desired. The tube is stopped in the centre so as to force the air at once into
the house and so as not to interfere with the passage of the foul air on its way out.
The accompanying drawing represents a transverse section through the upper
portion of a roof provided with my improved ventilator.
A being the horizontal tube.
B, B 1, are the bell mouth openings or cowls at either end of same.
C, C¹, are the perforations on under side of tube A.
D, is the division plate or stop in centre of tube A.
The arrows indicate the direction of the currents of air.
Thus, a current of air entering the opening or cowl B, is directed by the bend or
elbow to the nearest perforations C, in the horizontal tube A, passing through which
it meets the hot foul air generated within the closed fowl house and causes it to pass
through the perforations C³ of the tube A, and so to the outside of the house, escaping
at B¹; a continuous circulation of air being thus obtained within the house, the birds
being however not in draught and kept perfectly warm in the coldest weather.

page_text: The tube or tubes, may be of zinc, or any suitable material, of any required
dimensions, and be fitted in the most convenient manner.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed, I declare that what I claim is :—
A ventilator for Poultry Houses and other buildings consisting of a tube each end
passing outside the house, perforated at that part within the house, having a division
separating the incoming and the escaping air, and with or without movable ends or
cowls, the whole substantially as described.