Year: 1889

page_text: 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 forms the shaft
for drawing up the air-this shaft is surmounted at the top with a revolving cowl
which works upon Ball-bearings.
The 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 insido this shaft and thus 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 side ways 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 bearing of this revolving cowl may
bo oiled with ease.
This cowl revolves on a conical shaped end of a long spindle that passes down a
tube prepared and fixed to receive the same and which is fixed on cross bearers to
the aforementioned pyramidal shaped base or shaft.
The bottom of this aforementioned tube is stopped by a screw pin having screw
lock nut attached, and small balls of a hard nature either steel balls or case hardened
ones are placed in the bottom of this tube for the conical shaped end of the spindle
of Cowl to revolve on-The tube taking the spindle is thickened out at top to allow a
moveable screw cap on spindle to be screwed into the thickened out head so that
the cowl cannot be blown off-An ornamental knob may be placed as a finish to the
appearance of the cowl.

page_text: In order that the nature of my said improvements may be the more fully
understood I will now proceed to describe the several figures on the sheet 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 lines
elevation.
of
Figure 3 is a vertical section through the whole of my improvements, and
Figure 4. is a detail to a larger scale shewing the Ball bearings of spindle.
In Figure 1, A shews the pyramidal shaped base or 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. Fis 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
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. K is the tube in which it
works and indicates tho cross-bearers that carry the tube K-M shews the balls on
which bears the end of spindle H and, N is a cap or covering to enclose same.
P is a
screw nut which allows the spindle to work easily through it, and which is screwed
into the thickened out head of tube K.
Figure 4. is the detail before referred to of the Ball bearings marked with the letters
of reference before referred to.
As my improvements are capable of some modifications without departing from the
principle thereof, I do not restrict myself to materials, dimensions, or to the precise
form or placement of the several parts thereof.
Having now fully 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 :-
1. An extracting cowl fitted with a revolving head that works upon Ball bearings
substantially as herein before described and set forth in this specification and illustrated
by the accompanying drawings.
2. The application of Ball bearings to revolving ventilating Cowls as herein before
described.