Improvements in Apparatus connected with the Manufacture of Sulphate of Ammonia.
Year: 1890

page_text: Date of Application, 13th Aug., 1890
Complete Specification Left, 11th May, 1891-Accepted, 13th June, 1391
TROLIUNAL DE MULTIATION.
Improvements in Apparatus connected with the Manufacture of
Sulphate of Ammonia.
We ROBERT DEMPSTER and JOHN DEMPSTER, of Newton Heath, Manchester,
Engineers, do hereby declare the nature of this invention to be as follows:-
The improvements relate to apparatus connected with the manufacture of sulphate
of ammonia, and have for object a convenient removal of the sulphate of ammonia
from the saturator or saturators to the drainers.
To accomplish this and to effect our improvements, we fix, within the saturator
by preference, in any suitable manner, a pump with the suction tube extending to
the bottom, or nearly to the bottom of such saturator.
From this tube a branch tube is connected or formed leading to the drainer or
drainers.
The ends of these tubes are provided with valves, of any suitable kind and
substance, in such manner as to alternately close and open the same with each
stroke of the pump piston. The pump barrel we prefer to construct above these
tubes and of larger area; but, as a modification, a form of pump may be employed
wherein the piston is below the branch tube, in which case such branch tube will
not require a valve or clack.
When large apparatus is employed we prefer to operate the pump by power;
but pumps may be arranged for this purpose to be worked by hand.
As a precaution against the possibility of drawing the acid over to the pump
barrel, such pump barrel is, by preference fixed at a sufficient height over the
junction of the branch tube aforesaid; or a syphon pipe of sufficient height may be
introduced; or a weighted valve may be employed.
The pump and tubes may be composed of any suitable material; but we prefer
lead or copper for the tubes, and india-rubber, vulcanite, lead, or other material
little influenced by acid or ammonia for the clacks or valves.
Variations in detail may be made without departing from the peculiar character
of the invention.
Dated this 12th day of August 1890.
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus connected with the Manufacture of
Sulphate of Ammonia.
We, ROBERT DEMPSTER and JOHN DEMUSTER, of Newton Heath, Manchester,
Engineers, do hereby declare the nature of this invention and in what manner the
saine is to be performed, to be particularly described and ascertained in and by the
following statement :-
The improvements relate to apparatus connected with the manufacture of sulphate

page_text: of ammonia, and have for object a convenient removal of the sulphate of ammonia
from the saturator or saturators to the drainers.
To accomplish this and to effect our improvements, we employ a pump of ordinary
mechanical description, or a centrifugal or other rotary pump, and in the case of
the ordinary form of pump, fix it within the saturator, (by preference) in any suitable
manner; and with every form of pump we may employ, we arrange the suction
tube thereof to extend to the bottom, or nearly to the bottom of such saturator.
From this suction tube a branch tube is connected or formed therein leading to the
drainer or drainers. The ends or other parts of these tubes are provided in case
of an ordinary pump being used with valves of any suitable kind and substance,
arranged in such manner as to alternately close and open with each stroke of the
pump piston. But in case we employ centrifugal or rotary pumps, such clacks
may be dispensed with.
The pump barrel and piston, in some cases, we prefer to construct at a higher
level than these tubes, and of larger area; but a form of pump may be employed
wherein the piston is below the branch tube aforesaid, in which case such branch
tube will not require a valve or clack. And in the case of a centrifugal or rotary
pump being employed, neither of the tubes will require to be provided with clacks.
When large apparatus is employed we prefer to operate the pump by power, by
means of a pulley and crank or by other well known means; but pumps may be
arranged for this purpose in such manner as shall enable them to be worked by
hand.
As a precaution against the possibility of drawing the liquid over to the pump
barrel, where the ordinary kind of pump is employed, such pump barrel is, by
preference, fixed at a sufficient height over the junction of the branch tube aforesaid;
or a syphon pipe of sufficient height may be introduced; or a weighted valve may
be employed to accomplish the like object.
The pump and tubes may be composed of any suitable material, and may be of
any convenient form, but we prefer lead or copper as a material for the tubes, and
india-rubber, vulcanite, lead or other material little influenced by acid or ammonia
for the clacks or valves.
Variations in detail may be made without departing from the peculiar character
of the invention.
We are aware of the Specification of Wilton's Patent No. 19225 of 1889 and
we make no claim for anything described and claimed therein.
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-
In apparatus employed in the manufacture of sulphate of ammonia, the connecting
of the saturator and strainer or strainers by means of a tube or tubes provided, or
not as the case may be, with clacks or valves, and combining the same with a pump
of ordinary mechanical description, or with a centrifugal or rotary pump, placed in
circuit with such tubes, for the purpose of lifting or conveying the sulphate of
ammonia from the saturator to the drainer or drainers, in manner substantially as
herein described.
Dated this 9th day of May 1891.
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent for the Applicants.