Improvements in and connected with Chimney and Ventilating Shaft-tops.
Year: 1899

page_text: Date of Application, 30th Jan., 1899-Accepted, 25th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in and connected with Chimney and Ventilating
Shaft-tops.
I, WILLIAM BROWN, of Palmers Buildings, 19, West Nicolson Street, in the
County of the City of Edinburgh, North Britain, Blacksmith, 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 the employment of a revolving device acting in a
manner similar to what is known as a whirligig ventilator, but differing essen-
tially from it in construction, as will be afterwards more fully described, and
is suspended by a suitable adjustable arrangement over, and in varying prox-
imities to, the outlet of the chimney.
The axle of rotation is carried on ball bearings which forms a very important
feature of my improvements.
In order that my invention may be properly understood and readily carried
into effeci I have appended one sheet of drawings, of which,
Figure 1 is a front elevation of the device, which, as illustrated, is applied to
a chimney can.
Figure 2 is a plan of the same, and Figure 3 is a vertical section of the axial
suspension and ball bearings.
The canopy or dome marked A is formed of thin sheet metal and is provided
with involute openings, which are formed by punching or stamping out the
divisions marked a, and turning up the piece marked b, whereby a triangular
opening is formed for the escape of the smoke. The gaps at the circumference
are bridged across by the pieces d.
The turned up pieces 6 constitute vanes and are acted upon by the wind and
draught of the chimney, which operation is such as to maintain a constant with-
drawal of the smoke and a uniform draught of the chimney. The canopy A is
suspended from the bent arm 1, which is carried in an eye C riveted on to a
clamping ring D. By means of the clamping screw E the vertical rod of the
bent arm may be raised to various elevations. The axial suspension will be
readily understood from Figure 3 to consist of a male and female cup piece F
and G, which is screwed together with the central portion of the canopy between
them. In the cup formed by the said two pieces the balls H are placed, which
are interposed between the wall of the inner surface F and the hub of the
spindle I. It will be understood that this arrangement will offer a means for
smooth and rapid rotation for the canopy A when pin or tightening screw J is
adjusted.
When required, as when sweeping the chimney the device can be swung from
over the chimney can by means of the rod B and eye C, as already referred to.
Of course it is to be understood that I do not confine myself to suspending
such a canopy only as is shewn and described, as my improvements are also appli-
cable to suspending other forms of canopies.

page_text: 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;
-
1. In smoke curing and the ventilation of chimneys and other places, the
method of suspending the canopies, substantially as described and illustrated in
the accompanying sheet of drawings.
2. In smoke curing and the ventilation of chimneys and other places, the con-
struction of revolving canopy, substantially as described and illustrated in the
accompanying sheet of drawings.
3. In smoke curing and the ventilation of chimneys and other places, the use
of ball bearings for the revolving of the canopy, substantially as described and
illustrated in the accompanying sheet of drawings.
4. The means of adjusting or tightening up the canopy substantially as
described and shewn.
Dated this 28th day of January 1899.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow,
Applicant's Patent Agents.