Improvements in Ventilators and Chimney Tops.
Year: 1893

page_text: Date of Application, 4th Apr., 1893-Accepted, 20th May, 1893
COMPLETE SPECIFICATION.
Improvements in Ventilators and Chimney Tops.
I, GEORGE COOPER of the Electric Works The Wicker Sheffield in the County
of York Coppersmith, 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 present invention relates to ventilators, and is also applicable to chimney
tops; its object being to lift a volume of air from a confined space by the action
of the wind, and to prevent the wind blowing down the chimney or ventilating
shaft, or any back current; to attain which I apply to the top of a chimney or
ventilating shaft, two or more curved wings which are bent over in the form of
oblique shields leaving an opening at their lower edges, and a space between them
at the upper part, and over this upper space I place a further curved shield whose
sides extend in a vertical direction. Each curved shield is wider at its centre than
at its ends and the ends of all the shields are either swivelled or rivetted to either
side of the chimney or shaft. In order to make my invention better understood
and so that it may be readily carried into effect I will proceed to describe the same
by reference to the accompanying drawings in which
Fig. 1 is a side elevation of my improvement applied to the top of a chimney,
and Fig. 2 is a front elevation of same, and
Fig. is a side elevation of a modification of my said invention applied to a
ventilating shaft top.
Similar letters of reference denote corresponding parts in each view.
Referring to Figs. 1 and 2 I employ three shields A and B. The two shields A
are wider at a¹ than at a², and they are bent round as shown, and are preferably
rivetted at either side of the chimney top C by rivets a³. Suitable spaces for the
wind or air to pass through are left at a', and also a space is left at a³ above or
over which the shield B is arranged with its ends rivetted by the rivets a³
having suitable side spaces b². Where preferred instead of rivets a³ being used
suitable pins may be employed upon which the shields A and B may swivel so as
to be placed in any position as will be well understood. The wind blowing against
the shields A and B in any direction is found to accelerate the draught up the
chimney top C, or ventilating shaft, and no matter in which way the wind impinges
on the shields-a-down-draught is impossible. Referring to Fig. 3 I fix to the
top of the ventilating shaft S six shields A and-one.shield B as shown leaving
the spaces marked a³, a', and 62, as shown, and it will be obvious that such-an
arrangement could be applied to a chimney top, and also that the arrangement
shown at Figs. 1 and could be applied to a ventilating shaft S. I do not limit
myself to the number of shields A employed, although I prefer in the case of a
chimney top to have two, and in the case of a ventilating shaft top to have six as
shown.
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:
1. The application to chimney tops or ventilating shafts of two or more
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page_text: and illustrated in the accompanying drawings, or any mere modification of the said
combination.
Dated this 28th day of March 1893.
H. F. BOUGHTON, M.I. Mech. E.,
Commercial Street, Sheffield, Agent.