Year: 1897

page_text: I, RICHARD AMES, of 116 Loughborough Road, West Bridgeford, Nottinghant,
Mechanical and Sanitary Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in the construction of manhole frames-
and covers for sewers and the like, whereby they may be used as ventilating
or non-ventilating covers as desired.
Provision being also made for preventing the covers from getting fast in the
seating in the frames.
In carrying out my invention I form the seating which carries the cover
near the top of the frame. In the face of the seating I form shallow and deép
recesses in which the dirt pan or bucket may be suspended by hangers.
The seating being formed close to the top of the frame reduces the surface of
contact between the cover and the frame, and thereby prevents the cover from
corroding fast in the frame, but in order to prevent the covers from rocking or
getting out of position when passed over by vehicles, I carry the cover a
distance down the frame with a clearance between the walls of the cover and the
frame, and on the bottom edge of the cover I form a flange or fillet, the outer
edge of which comes in contact with the walls of the frame.
On the outer edge of the cover at the top, I form a rim or lip which projects: -
over the joint between the cover and the frame, and thereby prevents grit and dirt.
from getting into the seating.
The cover has apertures formed in the top for ventilation, and the pan or
bucket for catching any dirt which may pass through the apertures, is suspended
by hangers, the distance between the top of the bucket and the underside of the
hangers being the same as the distance between the depth of the shallow and
deep recesses in which the pan or bucket may be suspended.
When it is desired to use the cover for ventilating purposes, the bucket or pan is
suspended in the deep recesses or lower bearings, the bucket or pan the hangs a
sufficient distance below the underside of the cover, to permit of air or gases
passing between the underside of the cover and the top of the pan or bucket.
When it is desired to discontinue ventilating through the cover, the pan or
bucket is suspended in the shallow recesses, this brings it close up to the under-
side of the cover which is carried down to the level of the deep recesses or
bearings, and thereby prevents any air or gases passing between the pan or bucket
and the cover.
The frames covers and dirt pans or buckets may be made any desired shape
and in any suitable material.
Dadel
001
1007

page_text: Improvements in mannole Frames and covers.
I, RICHARD AMES, of 116 Loughborough Road, Westbridgeford, Nottingham,
Mechanical 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 the construction of manhole frames
and covers for sewers and the like, whereby they may be used as ventilating
or non-ventilating covers as desired provision being also made for preventing
the covers from getting set fast in the seating in the frames.
In carrying out my invention I form the seating which carries the cover near
the top of the frame. In the face of the seating I form shallow and deep
recesses in which the dirt pan or bucket may be suspended by hangers or hooks.
The seating being formed close to the top of the frame, reduces the surfaces of
contact between the cover and the frame to a minimum and thereby prevents
the cover from corroding and becoming set fast in the frame, but in order to
prevent the covers from rocking or getting out of position when passed over by
vehicles, I carry the cover a distance down the frame with a clearance between
the walls of the cover and the frame and on the bottom edge of the cover I form
a flange or fillet, the outer edge of which comes in contact with the walls of
the frame.
On the outer edge of the cover at the top, I form a rim or lip which projects
over the joint between the cover and frame and thereby prevents grit and dirt
from getting into the seating.
The cover has apertures formed in the top for ventilation, and the pan or
bucket for catching any dirt which may pass through the apertures is suspended
by hooks or hangers the distance between the top of the bucket and the under-
side of the hooks or hangers being the same as the distance from the bottom of
the cover when in place to the top of the shallow recesses in the frame from
which the bucket or pan may be suspended.
When it is desired to use the cover for ventilating purposes, the bucket or pan
is suspended in the deep recesses, or lower bearings the bucket or pan then hangs
a sufficient distance below the underside of the cover to permit of air or gases
passing between the underside of the cover and the top of the pan or bucket.
When it is desired to discontinue ventilating through the cover the pan or
bucket is suspended in the shallow recesses this brings the top thereof close up to
the underside of the cover, which is carried down to the level of the deep recesses
or bearings, and thereby prevents any air or gases passing between the pan or
bucket and the cover.
The frames, covers, and dirt pans or buckets may be made any desired shape
and in any suitable material.
And in order that my said invention may be fully understood I will proceed to
explain the same with reference to the accompanying sheets of drawings in
which:-
Fig. 1. represents section through a manhole frame and cover constructed
according to this invention.
Fig. 2. is plan of cover and frame.
Fig. 3. is elevation of dirt pan or bucket.
Fig. 4. is plan of same.
Fig. 5. is section shewing bucket in position under the cover.
Fig. 6. is plan of underside of cover.
Fig. 7. is perspective view of manhole frame cover and bucket complete.

page_text: Fig. 8, is perspective view of manhole frame shewing bucket in the position
required when the cover is used for ventilation purposes.
The same letters denote the same parts in all the Figs.
a is the frame the cover having ventilation orifices c therein. d is the dirt
pan or bucket suspended by means of hooks or hangers f from either deep
recesses or from shallow recesses h in the frame a.
There are three deep and three shallow recesses arranged alternately around
the circumference of the frame the said recesses being equidistant from each
other.
The underside of the cover is cut away at six equidistant points i to allow the
hooks or hangers to pass.
kk are handles by means of which the dirt pan or bucket may be lifted in and
out of the frame.
There are three hooks or hangers on the bucket or pan equidistant from each
other so that when it is desired to remove the hangers from the deep to the
shallow recesses in the frame or vice versa the bucket or pan must be rotated one
sixth of a revolution.
1 are strengthening brackets m is the usual keyhole to receive the key by
means of which the cover is lifted. nn are projections on the upper surface of
the cover to prevent pedestrians and others from slipping thereon.
As will be seen from Figs. 5, 7, 8 the frame is recessed at o to receive the
hangers.
To prevent more than the minimum of surface contact between the cover and
the walls of the frame and to enable the cover to be firmly held in the frame
without rocking or being displaced by passing vehicles I form the said cover
in the shape shewn in section Fig. 1 from which it will be seen that the said
cover is nearly as deep as the frame itself but that only a small portion of the
cover is in contact with the top of the frame.
The remainder of the cover is smaller in diameter than the frame and ter-
minates at the bottom in a flange which fits the lower portion of the frame
and so prevents rocking.
It will be seen that only the upper and lower portions of the cover are in
contact with he frame thus lessening the liability of the cover setting fast in the
frame.
q is a lip or flange projecting beyond the junction of the frame and cover and
so preventing dirt and grit from entering the joint. The cover and frame may
be made of any suitable shape and size of cast iron or steel and the bucket
and hangers of wrough iron or steel.
As shewn in Fig. 5 the bucket is suspended from the shallow recesses and the
top thereof is in contact with the bottom of the frame but if the bucket is hung
from the deep recesses as shewn in dotted lines a space is left between the top
of the bucket and the bottom of the frame communicating with the open air
by means of the openings c.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is:-
1. In manhole frames and covers for sewers and the like a deep frame with a
shallow seating therein to receive the cover in the face of which seating are
formed alternate equidistant deep and shallow slots or recesses to receive the
hangers by means of which the dirt pan or bucket may be suspended from the
said deep slots or recesses in such a position as to enable sewer gases or
air to pass between the top of the pan or bucket and the underside of the cover
or if preferred the bucket may be suspended from the shallow recesses when the
top of the bucket is in contact with the underside of the cover thus closing
communication between the sewer or the like and the outer air substantially
as described.

page_text: 2. In manhole frames and covers for sewers and the like a deep cover adapted
to fit a shallow recess in the frame the body of the cover being smaller in
diameter than the inside of the frame and provided with a flange at the bottom
thereof to fit the inside of the frame, the top of the cover being provided with
ventilation apertures and the flange being cut away to receive the hangers of the
dirt pan all substantially as hereinbefore specified and for the purposes stated.
3. In manhole frames and covers forming a projecting rim on the outer top
edge of the cover for the purposes of covering the joint between the frame and
cover and preventing dirt and grit from penetrating the joint.
4. In manhole frames and covers the combination of a deep frame having a
shallow seating therein to receive the cover and alternate deep and shallow slots
or recesses to receive the hangers of the dirt pan or bucket, a deep cover smaller
in diameter than the inside of the said frame and having a flange at the bottom
thereof fitting the inside of the cover the top of the said cover being adapted to fit
the searing in the frame and provided with ventilation orifices and a rim
covering the joint between the cover and the frame and a dirt pan or bucket
provided with books or hangers adapted to engage with the recesses in the rini
by which means the cover may be made ventilating if the hangers are placed in
the deep recesses or non-ventilating if the hangers are placed in the shallow
recesses all substantially as herein before specified.
5. Manholes and Covers for sewers and the like constructed as shewn by the
accompanying drawings.
T. E. HALFORD,
11 Furnival Street, London, E.C., Agent for Applicant.