Improvements in the Construction of Metal Grates for Street Sewers, Cellars, Ventilation, and other similar Uses.
Year: 1886

page_text: Date of Application, 1st Mar., 1886.
Complete Left, 25th Nov., 1886.
Complete Accepted, 8th Feb., 1887.
Improvements in the Construction of Metal Grates for Street
Sewers, Cellars, Ventilation, and other similar Uses.
I HENRY JOHN JAMES BROWNILL Broadfield Terrace Sheffield in the County of
York Agent do hereby declare the nature of my said invention for IMPROVEMENTS IN
THE CONSTRUCTION OF METAL GRATES FOR STREET SEWERS, CELLARS, VENTILATION.
AND OTHER SIMILAR USES to be as follows:-
My invention has for its object to construct a grate that while retaining the full
area of openings or apertures for the passage of water air or light, and the requisite
strength, shall save a very large percentage of metal, and in consequence shall be
much lighter than those made in the ordinary manner.
The grates for street gulleys are usually made to fit into an outside casing or box,
having an internal ledge upon which the actual grate rests. This grate for example
will consist of a rectangular frame of four sides with three longitudinal bars and one
central cross bar; there will thus be eight longitudinal openings.
Now in carrying out my invention, I dispense with the outside rectangular frame
with the exception of the short pieces that connect the ends of the three inside longi-
tudinal bars, and the ends of the central cross lar project on each side.
1 make the outside casing or box of the same size as the grate would have been if
completed in the usual way, and I provide a recess at each end to receive connected
ends of the three longitudinal bars; and a slot or narrow recess to receive the ends of
the cross bar, in the sides of the box.
The result is that the box or easing is reduced to the size of the grate without in
the least reducing the number or area of the openings.
I do not bind myself to either the size or the number of the openings, the above
description being only given as an example, neither is it absolutely necessary that
there should be a metallic casing or box as my invention can be used by letting a
metal grate into stonework, in the manner described.
ROBT. F. DRURY,
Agent for the Applicant.

page_text: The same principle is carried out in the construction of the manhole grate and frame
for sewers and other like purposes, shown in Fig. 5, as well as in the round grate
shown in Fig. 6.
I also wish it to be understood that it is not absolutely necessary, in carrying out.
my invention, to use an outer frame of metal, in connection with the grate, as
the grate B may be let into a stone suitably prepared to receive the parts marked
E, and G.
The grates may be loose so as to be lifted out of the outer frame A, or they may be
connected thereto by means of a joint-pin H upon which the grate may be turned; a
catch, or locking bar may also be added it desired. The use of a joint-pin prevents
the grate or grid from being moved out of its place, either feloniously or accidentally.
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:-
The improved construction of metal grates for street sewers, and other like
substantially as hereinbefore described and illustrated.
purposes,
ROBT. F. DRURY,
Agent for the Applicant.