IMPROVEMENTS IN GULLY GRIDS AND SEWER TRAPS
Year: 1885

page_text: We GEORGE KYTE and AUGUSTUS FREDERIC WILLIAMS of Mill Lane Ironworks
Cardiff in the County of Glamorgan, Engineers do hereby declare the nature of
our invention for IMPROVEMENTS IN GULLY GRIDS AND SEWER TRAPS and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention is for the purpose of more effectively removing and dealing with
the surface water of Streets, Roads, Yards, and other situations where water is
drained and conveyed away by means of closed sewers, and covered culverts and
drains; also for preserving a constant trap or seal to such sewers, culverts and
drains, to prevent the escape and diffusion of sewer gas and disease germs, and also
for an improved means of easily and quickly removing accumulations of sand, silt,
and other matter from gully and sewer traps, to which end we form and construct
our improved Gully Grid and Sewer Trap in manner specified as follows, that is to
say: We form a vessel of iron, or other suitable material (as shewn in the drawing
attached to this Specification and the alphabetical letters herein mentioned refer to
parts of the drawing distinguished by similar letters) having a jointed cover or
lid A, and a grating or grid B on the top, which vessel is sunk to a level with the
bottom of the channel or gully in which it is set and fixed, and is provided with a
curved and sloping plate or apron C, with a tongue D, a well E, with a movable
bucket F, a curved and rising passage G, beneath the plate or apron C, with a
raised back H, and a trough I, also a pipe or orifice J communicating with the
sewer, culvert, or drain.
The operation of our improved Gully Grid and Sewer Trap is as follows viz:-
The water from the channel or gully enters the vessel through the grid B, and
falling on the plate or apron C, runs into the bucket F in which bucket the sand,
silt and other solid matter is precipitated and the water rising through the
passage G, flows over the back H, and entering the trough I, passes under the
tongue D, and flowing over the edge of the trough I, falls through the pipe or .
orifice J, into the sewer, culvert, or drain The cover or lid of the vessel is provided
with an improved self locking tumbler bolt K, which being hung on the curved
pin L, by means of the loop M, drops into the recess N by its own gravity.
A suitable key is inserted through the keyhole O and engages with the tail end of

page_text: the tumbler bolt K, and being withdrawn in that position it causes the tumbler
bolt K to partly revolve round the curved pin L, and withdraw from the recess N,
and the cover or lid to be raised by the same motion when the bucket F may be
lifted out and emptied. On removing the bucket F, the water contained in the
passage G falls back into the well E, and that quantity contained by the trough I,
on both sides of the tongue D, acts as a constant and effectual trap or seal to
prevent the escape of sewer gas during the operation of removing the accumulated
matter from the bucket F.
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
1st The combination of the different parts specified and as arrranged to constitute
a new and improved form of Gully Grid and Sewer Trap, having the following
advantages viz :-
2nd A combination of parts which prevents all communication between a sewer,
culvert or drain and the surrounding or adjacent atmosphere.
3rd A combination which prevents the escape of sewer gas before, during, and
after the removal of accumulated sand, silt, and other matter from the grid.
4th A combination by which the removal of sand silt and other accumulated
matter is easily, inoffensively, and quickly accomplished.
5th A combination by which, on the sand bucket being replaced, and the cover
or lid being dropped, automatically locks itself, and so prevents inauthorized
interferance with the interior of the grid and trap.
6th A combination by which the trap water and scum usually visible in Gully
Grids is concealed from the public view.
And we declare these several claims to be distinctive advantages of our invention
of improvements in Gully Grids and Sewer Traps as particularly described and set
forth in this Specification and by the drawing attached hereto.