Improvements in Ventilating Apparatus.
Year: 1899

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Date of Application, 17th Jan.,
1899
1000
1011
AL
4000
Improvements in Ventilating Apparatus.
We, JAMES MCHARDY, Teacher of Music, of 83, Talgarth Road, West Ken-
sington, London, W., and DAVID STANLEY FROY, Manufacturer, of Brunswick
Works, Hammersmith, London, W., do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in ventilating apparatus, and
is an improvement upon a former invention of ours in which a system of suc-
tion and exhaust pipes is employed for exhausting the vitiated air in rooms,
tunnels and the like.
According to the present invention we employ a similar arrangement to that
described in our former application for Letters Patent No. 8717 of 1898, which
consists of a system of main pipes communicating with suitably actuated bellows
or their equivalent and having branches with perforated heads leading into
different rooms or compartments, but whereas in the former invention this
arrangement was for the purpose of exhausting the vitiated air, the present
invention is designed for the purpose of forcing out or supplying exactly the same
quantity of fresh air as the former arrangement referred to exhausts vitiated
air, thereby allowing of a supply of fresh air being drawn from any distance
or altitude and being diffused through perforations in the said pipes, the com-
bined areas of such perforations not exceeding the area of the main pipe or its
cquivalent.
The pipe (or pipes) which conveys the air may be provided with a coil or coils
so arranged that the air in its passage may either be heated or cooled in a suit-
able manner, with or without a mechanical automatic thermometer, which,
when regulated will shut off or throw on, the heating or cooling power.
1
171
1
. T.
1900
HUGHES, SON & Co..
38, Chancery Lane, London, W.C.,
For the Applicants.
Improvements in Ventilating Apparatus.
We, JAMES MCHARDY, Teacher of Music, of 83, Talgarth Road, West Ken-
sington, London, W., and DAVID STANLEY FROY, Manufacturer, of Brunswick
Works, Hammersmith, London, W., do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
lates
to
improvements in ventilating
-
apparatus, and

page_text: is an improvement upon a former invention of ours, (for which we have
obtained Letters Patent No. 8717, dated 14th April, A.D. 1898) in which a
system of suction and exhaust pipes is employed for exhausting the vitiated air
in rooms, tunnels and the like.
In carrying our present invention into practice we employ a similar arrange-
ment to that described in our former application for Letters Patent, above
referred to, which consists of a system of main pipes communicating with
suitably actuated bellows or their equivalent and having branches with perfo-
rated heads leading into different rooms or compartments, but whereas in the
former invention this arrangement was for the purpose of exhausting the vitiated
air, the present invention is designed for the purpose of supplying to an apart-
ment or the like exactly the same quantity of fresh air as the former arrange-
ment referred to exhausts vitiated air, thereby allowing of a supply of fresh
air being drawn from any distance or altitude and being diffused through per-
forations in the said pipes, it being essential that the combined areas of such
perforations do not exceed the area of the main pipe or its equivalent.
The pipe (or pipes) which conveys the air may be provided with a coil or coils
so arranged that the air in its passage may either be heated or cooled in a suit-
able manner, with or without a mechanical automatic thermometer, which,
when regulated will shut off or throw on, the heating or cooling power.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
The improvements in ventilating apparatus, consisting in forcing air into
apartments, tunnels or the like through perforated tubes or tubes having per-
forated heads, the sum of the areas of the said perforations not exceeding the
area of the main supply pipe or pipes, substantially as specified.
Dated this 12th day of October 1899.
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C.,
For Applicants.
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C.,
For Applicants.