Improved Extracting Cowl or Ventilator.
Year: 1889

page_text: Date of Application, 10th July, 1889-Accepted, 10th Aug., 1889
COMPLETE SPECIFICATION.
Improved Extracting Cowl or Ventilator.
I, JOHN DANIEL FRYER of Top of Ship Street, Brecon, Ironmonger, 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 consists of a hollow pyramidal shaped base which forins an up cast
shaft for drawing up the air-this shaft is surmounted at the top with a revolving
cowl which revolves by means of a long spindle in a hollow tube or socket, both
in a vertical position. At the bottom of this said tube is a steel hardened cup or
hollow cone and upon this the cup shaped or conical end of the spindle works as
a bearing.
The top of the before mentioned hollow tube is widened out so that a number of
small hard metal balls surround the spindle at this widened-out part. A moveable
screw cap surrounding the spindle is also arranged to screw down on to the top of this
widened-out portion of the hollow tube and this covering prevents any dust or dirt
getting to the bearings of the spindle, and also when it is required to oil these bearings
the cap can be unscrewed and lifted up, the oil put in, and the cap again
screwed down. I do not limit myself to the number of balls to be used as side
bearings in the widened out portion of the tube, or to the materials of which they
are to be made.
The up cast shaft before referred to has openings in the side with hoods over the
same, and these openings are so shaped that the outer atmosphere that may blow into
them is thrown in an upward direction inside this shaft and this induces an upward
current of air therein.
The sides of the cowl, or revolving part, are open and shaped on plan as curved
outwardly so that practically the opening is sideways and at top and bottom and not
in front-the openings are about eight in number, and for additional strength a stout
wire passes round the projecting pieces forming these openings both at top and
bottom. The top of this revolving cowl terminates in screw shaped pieces of metal
forming openings where each piece of metal is turned up into the air. One of these
screw shaped pieces is hinged so that the bearings of this revolving cowl may be
oiled with ease, and an ornamental knob may be placed as a finish to the appearance of
the cowl.
In order that the nature of my said improvements may be the more fully under-
stood I will now proceed to describe the several figures on the sbeet of drawings
hereunto annexed, all of which figures are marked with the like letters of reference
throughout.
Figure 1. is an elevation of my said improvements.
Figure 2. is a plan, the upper half of which looks down on the top of the cowl
and the other or lower half shews a sectional plan taken through dotted lines x, x,
of elevation.
Figure 3, is a vertical section through the whole of my improvements.
Figure 4. is a detail to a larger scale shewing the Balls which act as side bearings
to the spindle so as to reduce to a minium the friction of the revolving cowl and
Figure 5 is a continuation of the spindle shewing its bearings at the bottom.
In Figure 1. A shews the pyramidal up-cast shaft.-The hooded coverings C
indicate the pierced openings in shaft, hereinafter indicated by the letter B.-
D shews the outwardly curved openings in revolving cowl, and E the screw or
fan shaped pieces of metal forming the top of revolving cowl and which are so
curled up as to form spaces between each one.-F is the finishing knob.
In the lower part of Figure 2-G indicates the interior of the cowl and H the
spindle on which it revolves-In the upper part of this Figure 2.-J is the hinged

page_text: portion which is lifted up to oil the bearings, and it is securely fastened down by a pin
and chain.
In Figure 3. H is the spindle as before referred to and K is the tube in which it
works. S. S indicate the bearers that carry the tube K.-P is the moveable screw
cap to screw down on to the top of the widened out portion of tube marked T in which
are enclosed the balls before referred to.
In Figure 4 R. R indicate the balls that surround the spindle. I may use 2 or
more rows of balls if required.
In Figure 5.-V shews the hardened steel bearing for
a lock nut to secure the bearing V to cross pieces S. S.
tube K screwing on to the bearing V.
spindle to. work on and Y is
This figure also shews the
As my improvements are capable of some modifications, without departing from the
principle thereof, I do not restrict myself to material dimensions, or to the precise
form or placement of the several parts thereof.
Having now fully 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 :-
An Extracting cowl fitted with a revolving head working through the agency of a
long spindle in a tube at the head of which are balls surrounding the spindle which
acts to minimise the friction of the revolving Cowl Head, all as hereinbefore set forth
in this specification and illustrated by the accompanying drawings.
CTI 1000
RAYNER & CASSELL,
37, Chancery Lane, W.C., Agents for the Applicant.
RAYNER & CASSELL,
. 37, Chancery Lane, W.C., Agents for the Applicant.