Improvements in Apparatus for Cleaning Grids and Grates.
Year: 1889

page_text: Date of Application, 9th Feb., 1889
Complete Specification Left, 9th Nov., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPECIFICATION.
ommunicated from abroad by Delubac Auguste Fus of 10 Rue Posoul Paris
DE BOLETUATION.
[Communicated from abroad by Delubac AvoUSTE FILS of 10 Rue Pascal Paris
France.]
Improvements in Apparatus for Cleaning Grids and Grates.
1, WILLIAM EDWIN HEYS of 70 Market Street Manchester in the County of
Lancaster, Patent Agent, do hereby declare the nature of this invention to be as
follows:-
-
This Invention relates to apparatus for cleansing grates and grids, and these
Improvements have for their object the continuous automatic cleansing of grates and
grids in general and of the grids of turbinos and other hydraulic motors in particular,
by means of one or more rakes carried by endless chains or cables.
The endless chains or cables which carry the rakes are carried and driven by means
of chain wheels or pulleys. It is proferrod that more than one rake should be
employed and that they should be so arranged that the teeth of successive rakes
should pass between alternate bars of the grate. The teeth must have a sufficient
length to cleanse the spaces between the bars to the bottom.
To prevent the clogging of the teeth of the rake there is fixed in a suitable
position, a comb or series of pegs so that the teeth of the rake or rakes pass
between the teeth of the comb or between the pegs, which thus remove any
rubbish that may be clinging to the teeth of the rake at least once for every return
of the rake.
When this apparatus is used with hydraulic motors it serves in winter to remove
ice from the grates and to prevent the freezing of the water between the bars.
The apparatus may be adapted to the cleaning of the grates of furnaces, in which
case the teeth of the rake after passing rapidly between the bars of the grate may be
caused to pass through water to be cooled.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Cleaning Grids and Grates.
I, WILLIAM EDWIN HEYS of 70 Market Street Manchester in the County of
Lancaster, Patent Agent, (a_communication from abroad by Auguste Delubac of
40 Rue Pascal Paris, France 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 apparatus for cleansing grids and grates and these Improve-
ments have for their object to effect the continuous automatic cleansing of grids and
grates in general and of the grids of turbines and other hydraulic motors in particular
by the mechanical motion over the grids and grates of one or more rakes carried by
endless chains or cables in such a manner that the teeth of the rake or rakes pass
between the bars of the grid or grate and thus remove therefrom any detritus or
obstacles which may have accumulated or become entangled therein.
These Improvements are hereinafter more particularly described with reference to
the accompanying drawings in which Fig. 1 represents a vertical section; taken
along the line A---B Fig. 2; Fig. 2 a plan of the apparatus; and Figs. 3 and 4
a front and side view respectively on an enlarged scale of a portion of the grid and
rake.
The apparatus constructed according to this Invention consists of two endless
chains CC (or equivalent cables) which are parallel with each other and which
pass over the wheels R R R". If endless chains are employed these wheels have
Pavice 1

page_text: teeth which engage with the openings in the endless chains; if cables are employed,
the wheels are substituted by grooved pulleys or sprocket wheels. The wheels or
pulleys are respectively fixed upon the opposite ends of the shafts A A' A" all
of which are parallel with each other. The apparatus is constructed of such a
width that the rakes carried thereby may be able to operate over the whole width of
the waterway or grid.
The shaft A is the driving shaft and it may bo driven at a slow spoud the rate of
which cannot be definitely specified as it will vary with the amount and character of
the work to be done and with the number of rakos employed.
The rakes BB are fixed upon the chains or cables transversely to the apparatus so
that they are at right angles to the grids and that their teeth may pass in straight
lines between the bars of the grids. It is preferred that at least two sets of rakes
should be employed as represented in Fig. I but any other convenient number may
he adoptel as may be required by the local conditions. The teeth of the rakes are
mule sufficiently long to penetrate entirely through the grid and they are preferably
so arrange that the teeth of successive rakes pass between alternate bars when two
rakes are used. If three rakes are used, the teeth of each rake may pass through the
space following every third bar and the tooth of the following rakes will pass in the
paces not occupied by the preceding rakes, and so in like manner for other
number of rakes. The inclination of the grids favours their cleaning and the existence
of a free space wherein the detritus and accumulated matter removed by the rakes
may he received.
פאיאן
To prevent the fouling and clogging of the teeth of the rakes which might other-
wise take place, there is provided a fixed comb l' or equivalent series of between
which the teeth of the rakes pass and from which any entangled material is thus
removed. The comb I' or the rod carrying the equivalent series of pegs may be
adjustable in inclination and position. The bearings of the comb may be built
into a wall or be secured to the brackets or supports which carry the bearings of the
driving shaft A.
When the apparatus is used to cleanse the grids of turbines and other hydraulic
motors it will be found additionally useful as it will not only remove any ice therefrom
but will also prevent the freezing of the water in the grids.
When the apparatus is adapted to the cleansing of the grates of furnaces and firo-
places the rakes are caused to move rapidly under the bars and an arrangement is
provided whereby the teeth of the rakes may be caused to pass through water on their
return journey and thus to become cooled and so prevent any injurious result from the
heating effect,
The whole system is carried on two side frames which arrangement permits the
rakes to be sent to the place where the apparatus is to ho worked quite ready for fixing
and also permits them to be readily adjusted in all positions.
In the drawings the teeth of the rakes are reprosented as being riveted upon their
carrier but they may be formed from sheet steel in one piece with the carrier or in any
other convenient manner.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is ;-
(1) An apparatus for cleansing grids and grates constructed arranged and operated
substantially as hereinbefore described with reference to the accompanying drawings.
(2) In an apparatus for cleansing grids and grates one or more rakes carried by
endless chains or cables and arranged and operating so that the teeth of the rakes
pass through the length of the spaces between the bars of the grid or grates in ono
direction only; substantially as hereinbefore described and as illustrated by the
accompanying drawings.
1980