Improvements in Channel-bends for Drains.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Channel-bends for Drains.
I, ARCHIBALD WALTER BIRD, of 1, St. Helena Terrace, Richmond, in the
County of Surrey, Draughtsman, do hereby declare the nature of my invention
to be as follows:-
This invention has for its object to improve the construction of channel bends
such as are used in manholes and inspection-chambers of drains.
According to this invention I form the bend open throughout only a portion
of its length the socket at the inlet end and a short length of the bend immedi-
ately connected with the socket being circular in cross section. Adjacent to
this circular part the opening in the top of the channel-bend is wider than at
the parts nearer the outlet end of the channel bend to admit of a plug or stopper
being inserted into the circular part, and allow of a man conveniently inserting
his hand for adjusting the said plug or stopper. When the channel bend is
intended to discharge sewage matter into an open channel it is preferably formed
so that its cross-sectional area gradually increases towards the outlet end so as
to give a freeer discharge and the bottom of the said channel-bend curves upwards
towards the outer side of the bend where it joins the wall or lip which overhangs
the channel. The inner side of the channel-bend, from the curved form it
assumes at the before mentioned circular part is preferably flattened towards the
outlet end of the bend at which latter part the said wall may be flat and vertical
so as to form a more or less square angle at the part where this wall meets the
bottom of the bend and thereby causes the sewage matter to discharge at the
corner of the angle.
improvements in Caus or Drains.
I, ARCHIBALD WALTER BIRD, formerly of 1, St. Helena Terrace, Richmond, in
the County of Surrey, now residing at 6, Holmwood Road, Brixton Hill, in the
County of London, Draughtsman, 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 has for its object to improve the construction of channel bends
technically known as "three quarter section channel bends" such as are used in

page_text: "
manholes and inspection chambers of drains and each of which is constructed
as either a single bend or as an integral part of a junction.
I will describe the invention by reference to the accompanying drawings in
which Figure 1 is a perspective view and Figure 2 a plan of one of my im-
proved channel bends.
According to this invention I form the bend A open throughout only a portion
of its length, the socket B at the inlet end and a short length C. of the bend,
immediately connected with the socket, being circular in cross section, Adjacent
to this circular part C, as at A', the opening in the top of the channel-bend is
wider than at the parts A2, nearer the outlet end of the channel-bend, to provide
a hand-hole (hereinafter referred to by the letter A') to admit of a plug or stopper
being inserted into the circular part C, and allow of a man conveniently inserting
his hand for adjusting the said plug or stopper. When the channel bend is
intended to discharge sewage matter into an open channel it is preferably formed
so that its internal cross-sectional area gradually increases towards the outlet
end so as to give a freeer discharge, for example it may graduate from four
inches at a to four and a half inches at a', and the bottom of the said channel-
bend curves upwards, as at D, towards the outer side of the bend where it joins
the wall or lip E which overhangs the channel. The inner side of the channel-
bend, from the curved form it assumes at the before mentioned circular part C,
is preferably flattened towards the outlet end of the bend, at which latter part
the said wall may be flat and vertical so as, as shewn in Figure 1, to form a
more or less square angle at e where this wall meets the bottom of the bend
and thereby causes the sewage matter to discharge at the corner of the angle
and consequently prevents or reduces splashing, or overcasting on to the opposite
benchings.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A three quarter section channel bend for drains having a circular part
such as C, at its inlet end and the overhanging lip or wall of which is so formed
as to provide a hand-hole, such as A', substantially as and for the purpose herein-
before described with reference to the accompanying drawings.
2. A three-quarter section channel bend for drains constructed substantially
as hereinbefore described and illustrated in the accompanying drawings.
1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.