Improvements in or relating to Chimney or Ventilating Shaft Tops.
Year: 1893

page_text: Date of Application, 14th Mar., 1893
Complete Specification Left. 24th June 1893-Accepted 12th Aug. 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to Chimney or Ventilating Shaft Tops.
I WILLIAM WAGSTAFFE of The Firs Stanley Stoke-on-Trent Staffordshire
Designer do hereby declare the nature of this invention to be as follows:
The column of the chimney-pot or ventilating shaft is capped.
The upward current escapes through slots-or perforations-which perforations
are protected against the admission of a downward current by a screen.
The face lines of cap & screen are so arranged that if a down current enters the
screen it must pass the perforations & exhaust at bottom of screen.
It is so constructed that the bottom part of cap over-hangs the perforations
which are set back-
-so that the water which may run down the cap cannot enter
the column.
Dated this 13th day of March 1892
WILLIAM WAGSTAFFE.
COMPLETE SPECIFICATION.
Improvements in or relating to Chimney or Ventilating Shaft Tops.
I, WILLIAM WAGSTAFFE of The Firs, Stanley, Stoke-on-Trent, Designer,
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 is designed to supply a chimney top or ventilator top free from
the defects which usually attach to such articles.
In my improved top no rain can enter, and downdraught is almost impossible.
It can be made of durable materials at a very moderate cost, and can be easily
cleaned by the usual sweeps brush.
I will now describe it with reference to the accompanying drawings in which
Fig. 1 shows an elevation of the pot or top, with a guard or screen shewn in
section.
Fig. 2 shows a sectional elevation of the pot or top without the guard, which is
optional.
a is the top which it will be seen has a dome shaped summit a¹, and an annular
moulding m, also air inlets i and outlets o. The arrows show the direction of the
air currents. The inlets i are cut at a considerable incline upwards. d d are iron
supports which sustain the screens to which they are fastened by bolts or rivets b b.
These supports pass through holes in the moulding m formed to receive them.
desired the upper ends of these supports can be inserted or attached to a ring of
metal or another moulding passing round the upper part of the top.
If
The top a may be formed of metal or of terra-cotta, stoneware or earthenware, or
other suitable material. The wind guards is formed of galvanized iron or other
metal, and as before stated can be dispensed with when preferred, although it is
advisable to use it in exposed situations.
The form of the top is designed with the dome overhanging the outlets o in order
to prevent downward currents entering these outlets, or if they should enter to
facilitate their exit on the opposite side. The design adopted also prevents water
entering the top. The guard also assists in effecting these objects.
The tops can be made in various sizes.

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. A chimney-top or ventilator-top with capped or covered apex, and fitted with
ascending inlets and sheltered outlets, and with or without a cylindrical guard as
herein described and set forth.
Dated this 4th do of Tom 1902
S. S. BROMHEAD,
97, Newgate Street, E.C., Agent for Applicant.