Improvements in or relating to Ventilators.
Year: 1893

page_text: Date of Application, 8th May, 1893
Complete Specification Left, 8th Feb., 1894-Accepted, 17th Mar., 1894
.
PROVISIONAL SPECIFICATION.
Improvements in or relating to Ventilators.
I SAMUEL CHITTY of 54 Castle Street, Long Acre, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention to be as follows :-
This invention relates to improvements in ventilators and to improvements upon
chimney breast or other exit ventilators for rooms etc. and more-particularly upon
the mica flap ventilator patented by Thomas Boyle No. 1757 of 1864 and improved
upon by Comyn Ching according to Letters Patent No. 2753 of 1878 for pre-
venting the action of smoke and deposit of soot on the mica flaps, and for preventing
the noise which occurs through the passage of air and otherwise flapping or
fluttering.
The present improvement consists of one or more protection plates or shields
fixed on to or placed in the back part of the ventilator having openings for the
passage of air with an intermediate plate or plates with perforations or openings
(either with or without additional flaps or valves) arranged in such manner and
with adjusted areas, so as to prevent a reverse action of the ventilator, to facilitate
the passage of air in its proper direction and to regulate the current of air through
the openings where the original flaps are working.
Dated this 8th day of May 1893.
BROWNE & Co.,
9, Warwick Court, Gray's Inn, W.C., Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Ventilators.
I SAMUEL CHITTY (trading as Comyn Ching and Company) of 54 Castle
Street, Long Acre, in the County of Middlesex, Engineer, 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 relates to improvements in ventilatore and to improvements upon
chimney breast or other exit ventilators for rooms etc., and more particularly upon
the mica flap ventilators patented by Thomas Boyle No. 1757 of 1864 and improved
upon by Comyn Ching according to Letters Patent No. 2753 of 1878, for
preventing the action of smoke and deposit of soot on the mica flaps and for
preventing the noise which occurs through the passage of air and otherwise flapping
or fluttering.
The present improvements consist of one or more protection plates and shields
fixed on to or placed in the back part of the ventilator having openings for the
passage of air with an intermediate plate or plates with perforations or openings
(either with or without additional flaps or valves) arranged in such manner and
with adjusted areas, so as to prevent a reverse action of the ventilator to facilitate
the passage of air in its proper direction and to regulate the current of air through
the opening where the original flaps are working.
And in order that my said invention may be better understood I will describe the
same with reference to the accompanying sheet of drawings in which
Fig. 1 shews a back view of a mica flap ventilator as patented by Thomas Boyle
No. 1757 of 1864 and improved upon by Comyn Ching according to Letters
Patent No. 2753 of 1878 with my improvements adapted thereto.

page_text: BWS SECTIOn of same.
Figs. 3, 4, and 5 details hereafter referred to.
The same letters denote the same parts in all views.
abc shew plates fixed in the box à of a ventilator.
The plate u is perforated with taper holes as shewn (enlarged) in section at
Fig. 5 and this plate is shewn detached at Fig. 4.
The plate 6 has an opening e therein and this plate is shewn detached at Fig. 3.
The opening e, is shewn dotted at Fig. 1. The area of the opening e in plate b
should be less than the aggregate area of the openings in the plate or tray f. where
the flaps g are working so that should there be a strong current of air in the
chimney or through the ventilator, the pressure or velocity is taken off the outside
ventilating plate and the plate or tray f.
Moreover should the current of air cease suddenly the smaller area of the
opening e will prevent the flaps g from falling sharply on the plate or tray f.
The openings in the plates c and are in such position that in case of soot falling
by the action of the sweeps brush or otherwise the soot will not reach either of the
plates a or f.
The plates abc I prefer to make of metal and the openings in these plates may
be of any suitable size or shape to suit the size and shape of the ventilator.
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 combination of one or more plates provided with regulated openings
affixed to or placed in box at the back portion of chimney breast or other exit
ventilators for the purpose or purposes herein described.
2. Ventilators constructed substantially as described and shewn on the accom-
panying sheet of drawings.
Dated this 8th day of Fahuan 1001
BROWNE & Co.,
9, Warwick Court, W.C., Agents for Applicant.