: Improved Apparatus for Ventilating and other similar Purposes.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
:
Improved Apparatus for Ventilating and other similar Purposes.
I, ROBERT WILLIAM MCGREGOR, of 588 Barking Road, Plaistow, in the
County of Essex, Mechanical Engineer, do hereby declare the nature of this
invention to be as follows :-
:-
My invention has for its object the combination of a revolving cowl with a fan
in such a manner that the latter is so operated by the former as to effect an up or
down draught for ventilating buildings, vessels, railway carriages, and for other
similar purposes.
In carrying my invention into practical effect I use a cowl of cylindrical form
with a conical or partly conical top, the cylindrical portion being formed of vertical
concave vanes whilst the conical or partly conical portion is constructed of suitably
curved vanes, the spaces between all or part of these vanes being either closed or
left open as found desirable according to the condition under which the apparatus
is used.
An open space may be left between the cylindrical and conical portions of the
cowl in order that a larger volume of air or gas may pass through it, and where
this is the case the conical portion is preferably of larger diameter than the
cylindrical portion and so arranged as to overlap this opening and carry away
water which might otherwise enter it.
This cowl is mounted to revolve upon a vertical spindle projecting centrally
from the upper end of the shaft through which the up or down current of air or
gas is to be driven, said spindle being supported by suitable bars or struts extending
across the interior of the shaft. Čollars are formed or attached to this vertical
spindle to carry the weight of the cowl and between these collars and the bearing
surfaces of the cowl, balls or rollers are arranged to reduce friction, whilst other
balls or rollers are placed between the lower part of the cowl and upper end of the
shaft to prevent or reduce oscillation of the former.
In the lower portion of this cowl is secured an internal gear wheel or annular
rack, and with this gears a pinion secured on the upper end of a vertical spindle
mounted in suitable bearings in the shaft. The lower end of this spindle is so
geared by bevel or other gearing to the horizontal shaft of a fan arranged to
revolve partly in the shaft and partly in a recess formed therein, as to cause an
up or down current through the shaft as desired.
The shaft may be arranged to communicate direct with the part to, or from,
which a current of air or gas is to be supplied or withdrawn, but where the
apparatus used for ventilating railway carriages and the like purposes, I prefer
that the lower end of the shaft be connected with one or more perforated pipes
arranged in the upper portion of the part to be ventilated.
Dated this 11th don
1004
CASTLE SMITH,
Invention" Office, 54 Fleet Street, London, E.C.,
Agent for the Applicant.

page_text: Improved Apparatus for Ventilating and other similar Purposes.
I, ROBERT WILLIAM MCGREGOR, of 588 Barking Road, Plaistow, in the
County of Essex, Mechanical 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:-
My invention has for its object the combination of a revolving cowl with a fan
in such a manner that the latter is so operated by the former as to effect an up
or down draught for ventilating buildings, vessels, railway carriages, and for other
similar purposes.
In order to more clearly indicate the nature of my invention, I proceed to
describe the same and shall make reference to the accompanying sheet of drawings,
in which the same letter refers to the same part in each of the figures.
Fig. 1 represents a vertical section of my apparatus.
Fig. 2 is a section through A B of Fig. 1, and shews a plan of the fan and of
the bevel pinions by which it is revolved.
Fig. 3 shews on the right a plan of the conical part of the cowl hereafter
referred to, and on the left is a section through the vanes of the cylindrical
part of the cowl and also portion of the plan of the annular rack, hereafter
mentioned.
Fig. 4 is a section through C D of Fig. 1, and shews a side view of the bevel
pinions and the fan.
In carrying my invention into practical effect, I use a cowl of cylindrical form
such as a with a more or less conical top b. The cylindrical portion is furnished
with concave vertical vanes c, and the conical part is furnished with suitably
curved vanes d. The spaces between all or any of these vanes may either be
closed or left open according to the conditions under which the apparatus is used.
In the drawing the spaces between the vanes are left open on the cylindrical
part, and closed on the conical part.
An open space may be left between the cylindrical and conical parts of the
cowl, in order that a larger volume of air or gas may pass through it, and where
this is the case, the conical part is preferably of larger diameter than the
cylindrical part, and so arranged as to over-lap this opening and carry away any
water which might otherwise enter it.
The cowl is mounted to revolve on a vertical spindle e projecting centrally from
the upper end of the shaft f (hereinafter referred to as the "air shaft ") through
which the up or down current of air or gas is to be driven, the said spindle being
supported by suitable bars or struts g extending across the interior of the air-
shaft. The cowl may be further supported in its upright position by strengthening
bars h, having a bearing j at the top in which turns the upper end of the vertical
spindle e. Collars are formed on or attached to the spindle e to carry the
weight of the cowl, and these collars may be furnished with balls or rollers!
so arranged as to reduce the friction and other balls or rollers m m may be placed
under the lower part of the cowl so as to run in a gallery, on the upper part of
the air-shaft f. The lower end of the spindle e runs in the footstep o.
Around the inside of the lower part of the cowl is fastened an internal gear
wheel or annular rack p in which gears the plain pinion g. The pinion g is fastened
to the upper end of a vertical spindle r, and at the lower end of the spindler is
attached the horizontal bevel-wheel s gearing into the vertical bevel-wheel t
fastened to, or forming part of the boss u, of the fan v. The boss u is loose on
and revolves round the fixed horizontal shaft w to which is also attached the
footstep furnished with balls or some other means of reducing friction. A

page_text: collar y is also attached to w to keep the two bevel wheels s and t in gear
with each other. The shaft w is held rigidly at each end in suitable supports y² y².
The fan revolves partly inside and partly outside the shaft f, an aperture being
provided in the shaft f, to allow the fan to pass through. The fan is covered
outside by the casing
=.
When the cowl revolves, the rack p turns the pinion q and spindler, and these
turn the bevel wheels s and t and thus give rotation to the fan v, which causes a
supplementary current in the air-shaft f.
The air-shaft may be arranged to communicate with the part to or from which
a current of air or gas is to be supplied or withdrawn, but where the apparatus is
used for ventilating railway carriages and the like purposes, I prefer that the
lower end of the air-shaft be connected with one or more perforated pipes arranged
in the upper part of the place to be ventilated.
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 :-
In apparatus for ventilating and similar purposes the combination of a cow!,
revolving in a horizontal plane, with, and giving motion to, a fan revolving in a
vertical plane, substantially as in the manner described in the above Specification,
and exemplified by the accompanying drawings.
Dated this 14th day of Mar 1895
HUGHES & YOUNG,
23 Coleman Street, London, E.C., Agents for the Applicant.