324
THE NEW ZEALAND GAZETTE.
[No. 7

showered into it, consisting of a chamber containing the retorts,
suitable gas, steam, air, and exhaust flues built into the walls
of the furnace, and openings to allow the incombustible
material to fall into a water-sealed ash-pit. (3.) A gas-
producing apparatus in combination with a furnace, con-
structed and arranged as described with reference to and
shown in the drawings.

(Specification, 3s. ; drawing, 2s.)

No. 24450.—28th May, 1908.—ARTHUR J. WOODLEY, of
Carterton, New Zealand. Improvements in or relating to
the fastening of animal-covers.

Claim.—In animal-covers, the combination with the usual
hind-leg straps of a ring attached to the back edge of the
inside of the cover by means of a strap made of such a length
as to allow of the ring hanging between the horse’s legs, and
through which ring such leg-straps are passed, substantially
as and for the purposes specified.

(Specification, 1s. 6d. ; drawing, 1s.)

No. 24648.—7th July, 1908.—AVANDO WARREN HUSSEY
VIVIAN, of 103 Hop Exchange, London, England, Engineer ;
GEORGE LLEWELLYN DAVIES, of 8 Austin Friars, London,
England, Civil Engineer ; and LUDWIG GROTE, of 177 Mount
Pleasant Road, Tottenham, London, England, Engineer.
Improvements in or relating to the manufacture of arti-
ficial fuel.*

Extract from Specification.—The method of treating the
liquid hydrocarbons (Patent No. 21462, of 14th July,
1906), according to the present invention consists in sub-
jecting them to the action of chlorine, or, in other words,
chlorinating the liquid hydrocarbons. The chlorine may be
used in its gaseous form, but it may be found in practice to be
more convenient to use some compound or substance which
serves as a vehicle for the chlorine, and the substance which we
have found to be both advantageous and convenient is chloride
of lime, or so-called bleaching-powder.

[NOTE.—The above extract from the specification is inserted in place
of the claims.]

(Specification, 6s.)

No. 24994.—1st October, 1908.—CHARLES W. MERRILL,
of Alameda, State of California, in the United States of
America, Metallurgical Engineer. Process of and apparatus
for precipitating and recovering valuable materials from
solution.

Extracts from Specification.—I have discovered that when
a suitable precipitant is added to a moving body of solution,
such as a metal-bearing cyanide solution, and the mixture
is conducted without rest or without contact with the atmo-
sphere, or both, to a suitable pressure-filter, most of the dis-
advantages referred to are obviated, and more efficient
and economical results are produced. In case collecting-
tanks are introduced between the containers in which the
dissolution, particularly of the precious metals from the
crushed ore, takes place, and the filter, I add the precipitant
to the solution as it leaves the collecting-tank, or at some
point between the collecting-tank and the filter, or I may add
it to the filter direct. In the absence of collecting-tanks, I
add the precipitant to the moving solution at some point
between the crushed ore and the filter, or to the filter direct.
In practice cyanide solutions resultant from the treatment
of ores contain, in addition to the gold and allied metals,
another group, such, for example, as silver, lead, mercury,
&c., which may be precipitated, at least in part, as sulphides.
In some such cases it is very desirable to precipitate the latter
group, at least in part, before proceeding to precipitate the
gold, the remaining silver, and other metals. This I accom-
plish by the addition of a sulphide soluble in solutions of an
alkali or an alkaline-earth metal cyanide, which is added
either directly as an alkaline sulphide or formed in the cyanide
solution to be precipitated, and containing free alkali, by the
addition of hydrogen or other sulphide, the effect of which
is to precipitate some of the metals, at least in part, as sulphides
before the precipitation of the gold and other unprecipitated
metals, and also to recombine the cyanogen thus liberated
as an alkali metal or alkaline-earth metal cyanide, and leave
the solution in better condition for the precipitation of the
remaining metals by the second precipitant. After the afore-
said metals have been eliminated, at least in part, and gold
and other unprecipitated metals only are present, I pre-
cipitate them by any precipitant which may be found from
time to time convenient. A further object of my invention

is to render possible an equal distribution and agitation of the
unfilterable material within the containers of the filter-press
whenever the same is desirable, which is particularly the case
where metals are precipitated from cyanogen-bearing solutions
by means of a precipitant such as finely divided zinc, which
has a greater affinity for cyanogen than the metals to be pre-
cipitated, or by means of a regenerating precipitant, such as
an alkaline sulphide, by the use of which part of the cyanogen
—namely, that part in combination with such metals as will
be precipitated as sulphides from a cyanogen-bearing solution
—is regenerated or made available for further dissolving of
the metals as an alkaline cyanide. This object is accomplished
by making use of a duct leading from a port within the con-
tainer, and preferably located at the bottom thereof, to a feed-
channel located above said outlet and preferably in an upper
corner of the container. . . . A still further object of my
invention is to provide devices for maintaining a compara-
tively thick layer of precipitant and precipitate on the cloths
of the filter-plates through which the solution has to pass,
in filter-presses which are composed of a series of containers
and filter-plates, and particularly presses in which containers
and filter-plates are employed, the sides of which converge
toward the bottom inlet, and the object of maintaining
such comparatively thick layer is to insure practically a
molecular contact between the precipitant and the solution
to be precipitated, thereby effecting much more thorough
precipitation. The last object of my invention is to provide
devices which will prevent the material in the containers
from settling back into the channels of the press when the
latter is not in use. This I accomplish by means of a con-
tinuous valve arrangement for closing all inlets.

[NOTE.—The above extracts from the specification are inserted in place
of the claims.]

(Specification, £1 ; drawing, 10s.)

No. 25151.—29th October, 1908.—JUSTIN KAY TOLES, of
Yosemite Club, 245 North San Joaquin Street, Stockton,
California, United States of America, Manufacturer. Ap-
paratus for preparing and cleaning fibre.

Extract from Specification.—The invention consists sub-
stantially of a plurality of scutching-blades alternating with
a plurality of teeth, means to actuate the blades and teeth,
and devices to feed the fibre to and to hold it in a position
to be acted upon by said blades and teeth. One form of the
invention is described, and is illustrated in the drawing.

[NOTE.—The above extract from the specification is inserted in place
of the claims.]

(Specification, 5s. 6d. ; drawing, 1s.)

No. 25173.—4th November, 1908.—ISAAC HENRY COOPER,
of Queen Victoria Street, Ballarat, Victoria, Australia, Mill-
wright, and ALEXANDER HENRY WHITE, of Wendouree
Parade, Ballarat aforesaid, Maltster. Improvements in ele-
vators and conveyors.

Claims.—(1.) In an elevator, a cable to which cups or
buckets are attached by clamps over wire gauze or like suit-
able wrapping as set forth, a pulley having a suitable groove
to grip the cable, and having broad side surfaces to restrain
cup tilting as indicated. (2.) The combination with an ele-
vator cup, of parts substantially as shown in Fig. 3 of the
drawings. (3.) In combination with a cup or bucket carrying
cable or cables, a pulley having outer broad surfaces between
which is, or are, a groove or grooves adapted to grip the
cable or cables. (4.) The arrangement and combination of
parts as a whole as illustrated by Fig. 1.

(Specification, 2s. 6d. ; drawing, 1s.)

No. 25223.—13th November, 1908.—AGNES EDMOND,
Gentlewoman, and JOHN HERCUS, Commission Agent, both
of Exchange Court, Princes Street, Dunedin, New Zealand.
Improvements in pins.

Extract from Specification.—We form one or more kinks or
crimpings in the body of the pin, either occupying the principal
portion of the said body or in special places at or near the
ends of same ; and in a modification for the same purpose
we thin and spread the body where needed, instead of kinking
it.

[NOTE.—The above extract from the specification is inserted in place
of the claims.]

(Specification, 2s. 6d. ; drawing, 1s.)