Improvements in Ventilators.
Year: 1892

page_text: Date of Application, 4th Feb., 1892
Complete Specification Left, 4th Nov., 1892-Accepted, 31st Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Ventilators.
I, ARNOLD WRIGHT KERSHAW of Custom House Buildings, Lancaster in the
County of Lancaster, Architect & Ventilating Engineer do hereby declare the
nature of this invention to be as follows:-
:-
The object of this invention is to produce an improved exhaust ventilator for
buildings, ships, railway carriages, sewers, chimneys etc., the said ventilator being a
modification of my Patent 211682 and consists of an arrangement of three or more
concentric series of fixed deflectors or baffle plates, arranged hit & miss, so that
the opening or openings in any one series, shall be opposite the deflectors in the
next inner or outer series, but whereas the openings in the various series of deflectors
in the 1882 Patent are vertical, the openings in this ventilator are more horizontal.
A movable cover to the shaft of ventilator may be adopted for ships, actuated to
rise and fall on a central spindle, or by any other ordinary mechanical contrivance.
The various deflectors, may be spherical, conical, cylindrical, or a modification or
combination of all these forms.
1 1
2
DL1000
COMPLETE SPECIFICATION.
Improvements in Ventilators.
I, ARNOLD WRIGHT KERSHAW of Custom House Buildings, Lancaster, in the
County of Lancaster, Architect and Ventilating 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 :-
The object of this invention is to produce an improved exhaust ventilator for
buildings, ships, railway carriages, sewers, chimneys etc. the said ventilator being
a modification of my Patent 211682 and consists of an arrangement of three or more
concentric series of fixed deflectors or baffle plates arranged hit and miss (see Fig. 1.)
so that the opening or openings in any one series, shall be opposite the deflectors in
the next inner or outer series, but whereas the openings in the various series of
deflectors in the 1882 Patent are vertical, the openings or slits for the currents of
air to pass through approximate more to the horizontal.
Fig. 1. shews a vertical section of such ventilator, the letters A. B. C. D. on left
hand side of centre line corresponding to the same deflectors and letters in Fig. 5.
of my Patent 211682. The deflector marked B' on right hand side of centre line is
an additional safeguard against the entrance of water, snow, etc.
The arrangement of the deflectors will at once shew the direction taken by the
air current, as indicated by the arrows. A moveable cover may be adopted to the
shaft A. more particularly for ships actuated to rise and fall on a central spindle, or
The various deflectors may be
by any other ordinary mechanical contrivance.
spherical conical, cylindrical or a modification, or combination of all these.
Fig. 2. is a vertical section shewing the deflectors in a few such forms. The
ventilators may be either circular or polygonal on plan, and will be made of cast
or sheet metal or other suitable material, rivetted, soldered, or otherwise fitted
together.
I do not limit myself to the precise forms or proportions here shewn, and the
various deflectors may be placed proportionately nearer, or further apart than

page_text: shewn, & the openings in each rim may be increased or decreased in proportionate
size.
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
1st. The construction of ventilators with three or more deflectors arranged as
shewn on the drawings and as herein before described.
Dated this 3rd day of November 1892.
ARNOLD WRIGHT KERSHAW.