Improvements in Inlet Ventilators for Drainage and other Purposes.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Inlet Ventilators for Drainage and other Purposes.
I, SIDNEY JENNINGS of Palace Wharf, Stangate, London, S.E., Sanitary 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 inlet ventilators for drainage and other
purposes, and has for its object to provide a means for obtaining a fuller inlet of air
in proportion to the area of the pipes in connection therewith.
In carrying out my invention I construct the outlet leading to the tube to which
the ventilator is to be attached of a rectangular or other similar form which diminishes
in an oblique direction, thus allowing space for a full passage of air in proportion to
the size of the pipe, to freely enter the same immediately the mica louvres become in
the slightest degree actuated by the passage of the inlet draught and further to secure
a more adequate supply of air proportionate to size of pipe without increasing the size
of ventilator, I construct two air inlets one opposite the other each inlet being
provided with a mica or louvre valve which together when slightly opened admit of
the passage of a full inlet of air necessary for purification, which has not hitherto
been obtainable with ventilators as at present constructed, without enlarging beyond
proportion the size of ventilator owing to the mica valve being on one side only and
the mouth of the pipe being round instead of rectangular in shape as herein described
and shewn in the accompanying drawings.
And in order that my invention may be more readily understood and carried into
practice, I will now proceed to refer to the drawings hereunto annexed in which the
same letters of reference indicate corresponding parts throughout.
Figure 1 represents an elevation showing one face of my improved ventilator..
Figure 2 a section thereof on line A. B.
Figure 3 is a section of the air inlet and mouth leading to the pipe to which the
ventilator is attached and
Figure 4 is a plan on line C. D., of Figure 2.
A is the case of the ventilator, B the bars or grating thereof, C the mica valves or
louvre shewn clearly in Figure 2, D the rectangular portion of the pipe and E the
circular portion thereof.
The action of the mica valves is shewn by the dotted arc lines in Figure 2 each
valve or louvre opening to a central point thus affording admittance to a full supply
of air with a minimum of inlet area either side of the ventilator.
Having thus 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 construction and arrangement of ventilators such as herein described and
shewn in the accompanying drawings.
2. in a ventilator such as described the combination and arrangement of a double
air inlet with the inclined plane leading to the circular orifice substantially as
shewn.
Dated this 17th day of Tule 1800
HUGHES, ELI & HUGHES,
76, Chancery Lane, London, W.C., Agents for the Applicant.