Improvements in and relating to Covers for Inspection Apertures in Interceptors or other Traps, Drains, and the like.
Year: 1897

page_text: Date of Application, 24th June, 1897-Accepted, 24th July, 1897
COMPLETE DIEUITIVATION.
Improvements in and relating to Covers for Inspection Apertures in
Interceptors or other Traps, Drains, and the like.
We,
GEORGE FREEMAN, of Gordon House, Frederick Place, Brighton, in the County
of Sussex, Cement Merchant, and WILLIAM SHOOSMITH, of 42 Chester Terrace, Preston
Park, Brighton, aforesaid, Drainage Inspector, 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:-
Our invention relates to covers for inspection apertures in drains and the like and
comprises the improvements hereinafter set forth.
An important feature of our said invention is so constructing our improved cover
that it can be very readily removed or opened whenever access to the drain traps or
other places where it is fitted may be found desirable or necessary, and easily and
expeditiously replaced in position or closed when required.
Another important feature of our said intention is the provision in the said cover
of a transparent panel or window admitting of the interior of the drain, trap or other
place being inspected at any time without allowing any escape of sewer gas to take
place therefrom, and consequent dangers to health as is usually the case.
In the accompanying drawing
Figure 1 is a plan showing our improved frame and cover, and
Figure 2 is a vertical central section showing the said frame and cover fixed in
position in the access hole or aperture of an intercepting trap.
Like letters indicate corresponding parts throughout the drawing.
a is an outer frame of metal or other suitable material, which frame is adapted to
be fixed in the access hole of the interceptor A as shown in Figure 2, a gas-tight
joint being made by means of cement A¹ or otherwise. To the outer frame a is
hinged or jointed at a¹ a second or inner swinging frame b, which frame is glazed or
filled in with a sheet of glass or other transparent material c and'hermetically jointed
thereto with red or white lead as shown at c or otherwise. d is a thumb screw which
can be passed through a hole in a lug or projection b' on the inner or swinging frame b,
and screwed into a correspondingly screw threaded hole in a lug or projection a²
upon the outer frame a so as to form a gas tight joint between the two frames with
or without the interposition of suitable packing or jointing material. a³ is, an out-
wardly extending flange on the lower extremity of the outer frame a for the purpose
of facilitating the formation of a sound joint between the latter and the interceptor A
as shown in Figure 2.
It will be seen that by reason of the transparent panel or window in our improved
cover the state of the interior of the interceptor or trap or other place can be readily
Moreover should it
seen at any time without the necessity of opening the same.
be necessary to obtain access to the interceptor or trap to remove or clear away any
stoppage or impediment therefrom, the said cover can be readily opened by undoing
the thumb-screw d and swinging open the inner frame b without any necessity for
breaking and remaking complicated joints.
Although I have shown my improved.cover applied to the access hole or aperture

page_text: of an interceptor trap it is obvious that it can be advantageously applied to a gulley
or other trap, or a drain of any suitable description.
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 :-
1. An improved cover for interceptor or other traps and the like having a hinged
or swinging frame and a transparent panel or window substantially as and for the
purposes set forth.
2. The improved cover for interceptor or other traps and the like constructed
substantially as described with reference to the accompanying drawing.
Dated this day of June 1997.
A. F. SPOONER,
323, High Holborn, London, Agent for the Applicants.