IMPROVEMENTS IN APPARATUS USED FOR THE MANUFACTURE OF SULPHATE OF AMMONIA
Year: 1882

page_text: LETTERS PATENT to John Coates of 106 Cannon Street, in the City of
London for an Invention of "IMPROVEMENTS IN APPARATUS USED FOR THE
MANUFACTURE OF SULPHATE OF AMMONIA,"
PROVISIONAL SPECIFICATION left by the said John Coates at the Office
of the Commissioners of Patents on the 7th July 1882.
JOHN COATES of 106 Cannon Street in the City of London
"IMPROVEMENTS
IN APPARATUS USED FOR THE MANUFACTURE OF SULPHATE OF AMMONIA,"
This invention has reference to the manufacture of sulphate of ammonia from
ordinary gas liquor, and has for its object improvements in the construction and
application of certain parts of sulphate of ammonia making apparatus whereby the
manufacture may be conducted more conveniently, more economically than hitherto
and without danger or nuisance.
The invention consists in the first place of using two wrought iron steam pipe
coils, one within the other, in both the strong liquor stills as well as in the
weak liquor stills, by which about fifty per cent more sulphate can be made by
apparatus of equal capacity within a given time in consequence of the more rapid
evolution of the ammonia.
Secondly, in fitting the stills with gauge glasses and fittings so that the attendant
can at any time see the level of the liquor in the stills.
Thirdly, the construction and application of an agitator made with a handle
fixed to a spindle that passes through the top of the weak liquor still and
terminates in arms so that when turned they will agitate the contents of the still,
consisting of weak liquor and milk of lime, and thereby liberate more of the fixed
ammonia.
Fourthly, the fitting of a sludge pipe and cock to the weak liquor still, by which
the settlings may be conveniently drawn off; and the formation of mud holes and
doors for ventilating and cleaning.
Fifthly, the making of the steam inlet pipes to coils of lead and passing them

page_text: through stuffing-boxes on the tops of the stills and continuing them below the
liquor level, so that the wrought iron steam coils are always covered with liquor.
Sixthly, the application of steam for the purpose of forcing the milk of lime
into the weak liquor still.
Seventhly, the application of a Körting's blower or injector for the purpose of 5
raising the acid from the store tank to the raised supply tank.
Eighthly, constructing the saturators of a circular form, instead of as usually
square, whereby greater strength and durability is ensured.
Ninthly, Arranging the vapour pipes from the saturators so that they may enter
the still and assist in heating the same, before reaching the catch box, thus 1
saving fuel.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Coates in the Great Seal Patent Office on the
6th January 1883.
JOHN COATES of 106 Cannon Street in the City of London
"IMPROVEMENTS
IN APPARATUS USED FOR THE MANUFACTURE OF SULPHATE OF AMMONIA,"
This invention has reference to the manufacture of sulphate of ammonia from
ordinary gas liquor, and has for its object improvements in the construction and
application certain parts of sulphate of ammonia making apparatus, whereby the
manufacture may be conducted more conveniently and more economically than
hitherto, and without danger or nuisance.
The invention consists in the first place of using two wrought iron steam pipe
coils, one within the other, in both the strong liquor stills as well as in the weak
liquor stills, by which about fifty per cent more sulphate can be made by apparatus
of equal capacity within a given time in consequence of the more rapid evolution
of the ammonia
Secondly in fitting the apparatus generally with gauges, stand pipes and regulus
metal plug valves and. fittings so that the attendant can at any time ascertain the
level of the liquor in the various vessels, and remove the frequent liability to
leakage to which ordinary cocks are subject.
Thirdly. The construction and application of an agitator made with a handle
and hollow spindle [to which steam may be admitted] that passes through
the top of the weak liquor still and terminates in hollow perforated arms so that
when turned, or on steam being admitted to them, the contents of the still con-
sisting of weak liquor and milk of lime, will be agitated and as a consequence more
of the fixed ammonia will be liberated.
Fourthly. The fitting of a sludge pipe and cock to the weak. liquor still by
which the settlings may be conveniently drawn off and the formation of mud holes
and doors for ventilating and cleaning.
Fifthly. The making of the steam inlet pipes to coils of lead and passing.them
through stuffing boxes on the tops of the stills, and continuing them below the
liquor level so that the wrought iron steam coils are always covered with liquor.
Sixthly. The application of a Körting's blower or injector for the purpose of
raising the acid from the store tank to the raised supply tank
Seventhly. Constructing the saturators of a circular form with dome shaped
top instead of as usually square, whereby greater strength and durability are
ensured, and fitting the same with stand pipe and plug as herein described under
the second head.
Eighthly. Arranging the sulphuretted bydrogen vapour pipes from the
saturators or catch box so that they may enter the still and by being theroin
formed into one or more coils assist in heating the contents of the stills, thus
saving fuel,
Having now described and particularly set forth the nature of this invention
and the manner in which the same is or may be used or carried into effect, I would
observe in conclusion that I do not confine or restrict myself to the precise details
or arrangements which I have described or referred to as variations may be made
therefrom without deviating from the principles or main features of this invention,
but what I consider to be novel and original and therefore claim as the invention
•

page_text: secured to me by the herein before in part recited Letters Patent is,-The con-
struction and arrangement of apparatus for the manufacture of sulphate of
ammonia, and as herein described.
In witness whereof I the said John Coates have hereunto set my hand and
seal this Sixth day of January in the year of our Lord One thousand
eight hundred and eighty-three.
JOHN COATES (L.S.)