A NEW METHOD & APPARATUS FOR BRIGHT DIPPING OR CLEANING, ROLLED BRASS OR OTHER METALS
Year: 1884

page_text: PROVISIONAL DECIFIO
I WILLIAM POPE 2 Clent Villas Lonsdale Road Harborne Staffordshire Die
Sinker do hereby declare the nature of my invention for A NEW METHOD
& APPARATUS FOR BRIGHT DIPPING OR CLEANING, ROLLED BRASS OR OTHER
METALS, to be as follows:-
By this method the metal is drawn through aqua fortis, nitric or other suitable
acid and also through the water for washing or swilling, in a continuous strip,
starting at or near one end of the strip or length of metal and finishing at the other
end.
The apparatus consists of a cistern having several compartments, or of several
cisterns placed side by side, the first cistern or compartment containing the aqua
fortis or other acid to be used, and the others containing the water for swilling―
and of a number of guides or rollers, which are so placed as to cause the metal to pass
first through the aqua fortis or other acid and immediately afterwards through the
water necessary for swilling.
The advantages of this method over the method in general use of immersing the
strip or length of metal all at once either in a long trough, or in a coil-are as
follows viz.
1st Great economy in the quantity of aqua fortis or other acid used.
2nd The possibility of doing much longer strips,
3rd Greater certainty of having all the surface quite clear, as there is less liability
of it being stained by the fumes when passing from the acid to the water.

page_text: COMPLETE SPECIFICATION.
I WILLIAM POPE 2 Clent Villas Lonsdale Road Harborne in the County of
Stafford Die Sinker do hereby declare the nature of my invention for A NEW
METHOD AND APPARATUS FOR BRIGHT DIPPING ROLLED METALS and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
This invention consists of a new method and apparatus for cleaning or brightening
the surface of rolled brass copper or other rolled metal by drawing the metal
through aqua fortis nitric or other suitable acid and also through the water for
washing or swilling in a continuous strip starting at or near one end of the strip or
length of metal and finishing at the other end. The apparatus consists of a cistern
having several compartments or of several cisterns placed side by side The first
cistern or compartment containing the aqua fortis or other acid to be used and the
others containing the water for swilling and of a number of guides or rollers which
are so placed as to cause the metal to pass first through the aqua fortis or other
acid and immediately afterwards through the water necessary for swilling.
The advantages of this method over the method in general use of immersing the
strip or length of metal all at once either in a long trough or in a coil are as
follows viz.
1. Great economy in the quantity of aqua fortis or other acid used.
2. The possibility of doing much longer strips.
3. Greater certainty of having all the surface quite clear, as there is less liability
of it being stained by the fumes while passing from the acid to the water.
Having now described the method & advantages of my invention I herewith
present a drawing shewing the apparatus which is used in the following manner
viz.
The roll of metal is placed upon the roller A and one end of the metal having
been passed under or over (as the case may, require) the rollers marked B. is made
fast to the roller and windlass C. by turning the windlass C the whole of the strip
of metal is drawn first through the acid contained in the reservoir marked 4 which
cleans or dips it bright and then through the water contained in the reservoirs
marked 1. 2. 3 successively which removes the acid, being guided in the direction
required by the rollers marked B.
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 as my invention is
The cleaning or brightening (usually called dipping) of rolled metal by passing
it through the acid & swilling water gradually in a continuous strip or length by
means of an apparatus similar to that which I have herein before in part described
the same never having to the best of my knowledge and belief been accomplished
before.