Im- PROVEMENTS IN OR APPLICABLE TO SYPHON VENTILAMORO
Year: 1873

page_text: LETTERS PATENT to James Mitchell, of Halifax, in the County of
York, Syphon Ventilator Manufacturer, for the Invention of “Im-
PROVEMENTS IN OR APPLICABLE TO SYPHON VENTILAMORO "
Sealed the 5th December 1873, and dated the 7th June 1873.
PROVISIONAL SPECIFICATION left by the said James Mitchell at the
Office of the Commissioners of Patents, with his Petition, on the
7th June 1873.
I, JAMES MITCHELL, of Halifax, in the County of York, Syphon
Ventilator Manufacturer, do hereby declare the nature of the said In-
vention for "IMPROVEMENTS IN OR APPLICABLE TO SYPHON VENTILATORS," to be
as follows:-
This Invention relates to the class of ventilators technically known as
"Watson's syphon ventilators, and my improvements consist in the
application of a disc or deflecting plate suspended underneath the orifices
by or from a continuation of the usual midfeather, so that the inlet air
may be deflected along the under side of the ceiling instead of being

page_text: projected downwards as at present. This disc may be of any desirable
form or design, and placed at any suitable distance from the ceiling,
according to requirement.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Mitchell in the Great Seal Patent Office on
the 6th December 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
MITCHELL, of Halifax, in the County of York, Syphon Ventilator
Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of June, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said James Mitchell, Her special licence
that I, the said James Mitchell, my executors, administrators, and
assigns, or such others as I, the said James Mitchell, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
APPLICABLE TO SYPHON VENTILATORS," upon the condition (amongst
others) that I, the said James Mitchell, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
OR
NOW KNOW YE, that I, the said James Mitchell, do hereby declare a
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement and accompanying Sheet of Drawings, that is to

page_text: This Ivention relates to the class of ventilators technically known as
"Watson's" syphon ventilators, and my improvements consist in the
application of a disc or deflecting plate suspended underneath the orifices
by or from a continuation of the usual midfeather, so that the inlet air
may be deflected along the under side of the ceiling instead of being
projected direct downwards as at present. This disc may be of any
desirable form or design, and placed at any suitable distance from the
ceiling, according to requirement.
In order that this Invention may be fully understood I have hereunto
annexed a Sheet of Drawings, in which at Fig. 1 is shewn an elevation
partly in section of a ventilator, having my improvements attached;
Fig. 2 is a sectional plan view of the same.
A is the ventilator; B is the deflecting plate suspended underneath
the orifices O by or from the midfeather D and bolts D¹, so that the
inlet air will be deflected, turned, and diverted along the under side of
the ceiling E as shewn by arrows. The disc may be of any desirable
form or design, and placed at any distance from the ceiling according to
requirement.
Having thus fully described the nature and particulars of this my said
Invention, I would have it understood that I claim, the application and
use of deflecting plates constructed and employed in the manner and
for the purpose herein fully described and shewn in the Drawings.
In witness whereof, I, the said James Mitchell, have hereunto set
my hand and seal, this Fourth day of December, in the year of
our Lord One thousand eight hundred and seventy-three
Signed, sealed, and delivered
by the within-named James
Mitchell in the presence of
J. W. TASKER,
Clerk to Tasker & Brierley,
Patent Agents,
Halifax & Bradford.
JAMES MITCHELL. (L.s.)