An Improved Ventilating Device for Sewers.
Year: 1893

page_text: te of Application, 8th Nov., 1893-Accepted, 9th Dec., 1893
COMPLETE SPECIFICATION.
An Improved Ventilating Device for Sewers.
I GEORGE LAW Junr., of Comberton Hill, Kidderminster, Contractor, 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 an improved apparatus for the ventilation of sewers,
which can be applied to manholes, flushing chambers and other apertures connected
with the sewer, and which can be opened or closed by a simple movement of a key
inserted through the cover or grating cutting off the sewer gas from communication
with the atmosphere when desired. The apparatus consists of a cast iron manhole
cover and frame fitted with a detachable dirt bucket of suitable form and preferably
of galvanized iron. The cover is in the form of a grating or has a number of holes
for ventilating purposes, and a central hole of suitable form to allow of the insertion
of a key to operate the device hereinafter described.
The dirt bucket is formed with a flange at top which rests on a ledge on the
inside of the frame, the cover being placed in the frame and over the box on a
separate ledge. This box is furnished with a number of holes in the side, four
being a convenient number, and two parallel rebated flanges extending horizontally
around the sides, and forming a seating or guide for a ring of suitable dimensions,
covering the holes in the bucket.
This ring can be revolved by means of a bar extending diametrically across it,
the key above mentioned having a forked end which can engage with the bar when
inserted through the cover, and turn the ring. The said ring is formed with holes
corresponding to those in the bucket, and is arranged so that by turning it in
either direction the holes are covered or uncovered, cutting off or allowing
ventilation of the sewer as desired.
In order that the invention may be more clearly understood reference is had to
the accompanying sheet of drawings, in which
Fig. 1 is a vertical section of the complete device,
Fig. 2 is a section of the frame with the bucket and cover in elevation,
Fig. 3 is a horizontal section through the bucket and ring,
Fig. 4 shows the key employed to operate the device, and
Fig.
5 a plan of the key hole in the cover.
A is the frame of circular or other form having the ledge or flange a on the inner
side which serves to support the cover B, perforated or in the form of a grating.
The dirt box or bucket C is formed with the flange c at top which as shown rests
on the ledge a. A number of holes c¹ is formed in the sides of the bucket through
which ventilation of the sewer is obtained. Two horizontal ledges c' are furnished
on the inside, rebated so as to form a guide in which the ring D can turn. This
ring has perforations d corresponding to those in the bucket, so that when in a
certain position the openings are uncovered and a free passage is furnished
opening the interior of the sewer to the atmosphere, and when the ring is turned to
either side the perforations are closed. The ring is furnished with a cross bar d'
by means of which it is turned, a key E shown in Fig. 4 being pushed through the
key hole a¹ in the cover A and engaging with the said bar. This key is as shown
formed with a forked end which slips over the bar but any other suitable form of
end may be used which will engage with the bar.
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.) An improved ventilating device for sewere comprising a frome nerforated

page_text: cover, a dirt bucket having a number of apertures, and a ring fitted inside the
bucket also having holes, which can be turned so as to cover or uncover the
holes in the bucket substantially as described and for the purposes specified.
(2.) An improved ventilating device for sewers consisting of a frame, a perforated
cover fitting the said frame, a detachable dirt bucket having a number of apertures,
and a horizontal guide inside, supporting a perforated ring which can be turned,
covering or uncovering the apertures in the bucket, substantially as and for the
purposes specified.
(3.) An improved ventilating device for sewers consisting of a frame, a perforated
cover fitting the said frame, a detachable dirt bucket, formed with a number of
holes, and carrying a ring inside correspondingly perforated, the ring being turned
when desired by means of a cross bar and a key passed through the cover,
covering or uncovering the apertures in the bucket substantially as described.
(4.) An improved ventilating device for sewers the combination with a frame A
and a perforated cover B of a removable bucket C having flange c by which it is
supported, holes c¹ and horizontal ledges and ring D with holes d and cross bar d'
by which it can be turned, substantially as described and shown and for the
purposes specified.
(5.) The improved ventilating device for sewers constructed and operating
Bubstantially as described and illustrated in the accompanying drawings and for
the purposes specified.
Dated this 8th day of October 1893.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.