Improvements in Apparatus for Circulating, Mixing, or Aerating Fluids, or Impregnating the same with Gas, Air, or Vapour.
Year: 1892

page_text: Date of Application, 9th May, 1892
Complete Specification Left, 9th Mar., 1893-Accepted, 15th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Circulating, Mixing, or Aerating
Fluids, or Impregnating the same with Gas, Air, or Vapour.
We, CHARLES PERCY SHREWSBURY, of No. 35, Queen Victoria Street, in the
City of London, Engineer, and JOHN LASKEY DOBELL, of Traine, Modbury, in
the County of Devon, Electrical Engineer, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to improvements in apparatus for circulating, mixing, or
aerating fluids or impregnating the same with gas, air or vapour, and has for its
object to obtain a simple and efficient means for effecting this operation.
For this purpose, we employ a vessel of suitable size and shape, say preferable
an oblong rectangular tank, in which we place the fluid to be treated, and we
connect the ends of such tank by a circular pipe usually placed outside the tank.
In the interior of this connecting pipe we arrange an injector of special con-
struction hereinafter described which introduces compressed air, or gas or vapour
into the pipe in the direction in which the fluid will circulate.
The compressed air, or gas or vapour makes a current, and the whole contents
of the tank are thereby driven round and round and thoroughly mixed, baffle
plates or grids being employed where necessary in order to aid the mixing
operation.
The air, gas or vapour injector consists of a vena contracta which we fit tightly
in the connecting pipe and we pass the air, gas or vapour supply pipe through the
centre of the vena contracta whilst we expand such pipe beyond the neck of the
vena contracta to a funnel shape parallel with the diverging sides thereof, and we
may continue the funnel a short distance into the connecting pipe.
We cap the mouth or larger end of the funnel with a perforated plate so that
the air, gas or vapour passing through the perforations is evenly distributed and
acts as a ram to push forward the fluid in the connecting pipe and set up the
circulation.
In some cases, we may dispense with the connecting pipe and employ the injector
in connection with a simple tank or vessel.
Dated this 9th day of May 1892.
VAUGHAN & SON,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Circulating, Mixing, or Aerating
Fluids, or Impregnating the same with Gas, Air, or Vapour.
We, CHARLES PERCY SHREWSBURY, formerly of No. 35, Queen Victoria
Street, in the City of London, but at present of No. 8, Furnivals Inn, Holborn, in
the said City, Engineer, and JOHN LASKEY DOBELL, of Traine, Modbury, in the
County of Devon, Electrical Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
Our said invention relates to improvements in apparatus for circulating, mixing,
or aerating fluids, or impregnating the same with gas, air or vapour, and has for its
object to obtain a simple and efficient means for effecting this operation.
For this purpose, we employ a vessel of suitable size and shape, say preferably
an oblong rectangular tank in which we place the fluid to be treated, and we
connect the ends of such tank by a circulation pipe usually placed outside the tank.
מ
.
G

page_text: In the modification represented at Figure 5., the pipe b. connecting the two ends
of the tank a, is dispensed with and the injector 61 is arranged within a cylinder or
short length of pipe b. mounted in a suitable position upon a frame or support c. in
the interior of the tank a., the baffle plates, in this example, being dispensed with;
but we may here remark that the arrangement hereinbefore described with respect
to Figures 1, to 4, is that which we prefer.
Although we have hereinbefore described our invention in connection with the
circulation and mixing of fluids in an open topped tank it will be understood that it
may be usefully employed for aerating fluids or impregnating the same with gas,
air or vapour, and for some of these purposes it may be desirable to employ a closed
tank or vessel.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In an injector, the combination of a vena contracta and a pipe located axially
thereof for supplying air or the like under pressure, substantially as herein shown
and described.
2. In an injector, the combination of a vena contracta, a pipe located axially
thereof for supplying air or the like under pressure and a gradually expanding or
bell mouth to the supply pipe, all arranged in manner substantially as herein shewn
and described and for the purpose stated.
3. In an injector, the combination of a vena contracta, a pipe located axially
thereof for supplying air or the like under pressure, a gradually expanding or bell
mouth to the supply pipe and a perforated cap or end to the bell mouth, all
arranged in manner substantially as herein shewn and described and for the purpose
stated.
4. In an apparatus of the character hereinbefore referred to, the combination
with a tank or vessel of an injector, of the peculiar construction represented, located
either in the body of the tank or vessel or in a circulation pipe connected therewith,
substantially as herein shewn and described and for the purpose stated.
Dated this 9th day of March 1893.
VAUGHAN & SON,
Agents for the Applicants.