Improvements in Ventilators or Air Extractors.
Year: 1894

page_text: Date of Application, 8th Mar., 1894.
Complete Specification Left, 10th Dec., 1894-Accepted, 12th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Ventilators or Air Extractors.
I, CHARLES PHILIP LOWNDES TITHERLEY, of The Limes, Wallasey in the
County of Chester, Engineer, do hereby declare the nature of this invention to be
as follows:—
This invention relates to ventilators or air extractors and the object is to provide
means whereby air may be withdrawn from a beated room etc., without at the same.
time permitting down draughts of cold air or the ingress of rain, sleet, etc.
The uptake or shaft of the ventilator is of the usual construction and it is
provided with a series of internal baffle plates which serve to break up any down
currents.
The shaft is carried up to the outside of the building and is surmounted by a
top, the construction of which is as follows:-The top consists of a number of hat-
shaped rings placed concentrically oue above the other. In appearance, these
resemble a low broad-rimmed hat with the crown removed, the body part or walls
sloping inwardly and upwardly and the rim sloping downwardly and outwardly.
The internal diameter of the body part is approximately equal to that of the
shaft, and the uppermost portion of the body part of the one ring at about the
same level as the lowest portion of the body part of the ring next above, but on
account of the inward slope described, there is an annular passage between the
successive rings. The rings are attached to each other and to the shaft in any
suitable way and the uppermost ring, of course, is covered at the top.
The sloping rims serve to drain off the rain or any snow or sleet which might
lodge on them and which otherwise would drain into the shaft when liquefied; the
sloping body parts also serve to keep out the rain, sleet, etc., and in addition to the
sloping rims serve to so deflect the currents of air which impinge as to cause a
powerful up draught. The arrangement therefore forms a very effective extractor
and is in addition practically weather proof.
Dated this 7th day of March 1894.
SLOAN & LLOYD BARNES,
Castle Chambers, 26, Castle Street, Liverpool,
Agents for the Applicant.
Improvements in Ventilators or Air Extractors.
I, CHARLES PHILIP LOWNDES TITHERLEY, of The Limes, Wallasey in the
County of Chester, 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 :—
This invention relates to ventilators or air extractors and the object is to provide
means whereby air may be withdrawn from a heated room, etc., without at the same
time permitting down draughts of cold air, or the ingress of rain, sleet, etc.

page_text: According to my invention, I construct such a ventilator as follows, reference
being had to the accompanying drawings in which Fig. I is a sectional elevation of
the ventilator and Fig. II a transverse section on the line A. A. of Fig. I.
In each view the same parts are indicated by the same reference figures, and in
Fig. II the direction in which the section is viewed is indicated by the small arrows
placed adjacent to the letters denoting the plane of section.
The uptake or shaft 1 of the ventilator is of the usual construction and it is
provided with a series of internal baffle plates 2, of which only two are shown in
the drawings, which plates serve to break up any down current of air which may
enter.
The shaft is carried up to the outside of the building and is surmounted by a top
which consists of a number of hat-shaped rings 3 placed concentrically one above
the other. In practice, I have found it convenient to fit four such rings and I have
shown this number in the drawings, but, of course, the number may be varied to
suit the requirements of individual cases.
In appearance, each of the rings 3 resemble a low broad-rimmed hat with the
crown removed, the body part or walls sloping inwardly and upwardly and the rim
sloping downwardly and outwardly as shown. The internal diameter of the body
part is approximately equal to that of the shaft, and the uppermost portion of the
body part of the one ring is at about the same level as the lowest portion of the
body part of the ring next above, but on account of the inward slope described,
there is an annular passage 4 left between the successive rings; the uppermost
ring 3 is formed with a dome-shaped centre 8 which covers the top of the
ventilator.
The rings are attached to each other and to the shaft in any suitable way, but a
convenient mode of attaching the rings to one another is that shown in the drawings
where the rings are connected together by four bolts 5, and kept at the proper
distance apart by sleeves 6 through which the bolts pass. Bevelled washers 9 may
be attached to the rings to form facings for the distance pieces.
The bottom ring is brazed, soldered, or rivetted directly to the shaft 1, and, as
this ring has to carry the weight of the upper rings, bolts, etc., it is stayed by
means of a conical staying ring 7 secured to both the shaft and ring. The number
of bolts is, of course, determined by the size of the ventilator.
The sloping rims serve to drain off the rain or any snow or sleet which might
lodge on them and which otherwise would drain into the shaft when liquefied; the
sloping body parts also serve to keep out the rain, sleet, etc., and in addition to the
sloping rims, serve to so deflect the currents of air which impinge as to cause a
powerful up draught. The arrangement therefore forms a very effective extractor
and is in addition practically weather proof.
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 :-
The improved ventilator or air extractor, substantially as described and illustrated
in the drawings.
•
Dated this 8th day of December 1904.
amber 1904
SLOAN & LLOYD BARNES,
Castle Chambers, 26, Castle Street, Liverpool,
Agents for the Applicant.