844
THE NEW ZEALAND GAZETTE.
[No. 7

plane, and a pair of vertical grooves into which each of the
said pairs opens, all being held together; a magazine-stop
on each magazine, adapted to co-operate with any one of the
first-mentioned pairs of grooves; rollers on each magazine
to travel along the pairs of grooves and bars thereon to,
respectively, ride over and engage behind the respective
stops. (4.) In combination with the subject-matter of
claim 2, means for diverting a magazine from the pair of
vertical grooves into one of the other pairs; means for putting
such diverting-means out of operative position, and means
for restoring them thereto.

(Specification, 6s. 6d.; drawing, 3s.)

No. 23752.—22nd November, 1907.—WILLIAM SIMM,
Electrical Engineer, and HENRY SIMM, Engineer, both of
“ The Ash,” Portico, near Prescot, Lancaster, England.
Improvements in or relating to the production of zinc-oxide.

Claims.—(1.) The improved apparatus for obtaining zinc-
oxide from zinc-ores such as calamines and metallic substances
containing zinc, which consists of an electric furnace, or more
than one, formed on a wheeled truck, a hood for each furnace
carried by a permanent support and adapted so that its lower
edge can cover the top of the furnace and provides sufficient
opening for the supply of air for combustion, said hood having
a flue and a charging-hopper above the hood communicating
therewith through a valve, and a condensing-chamber com-
municating with the hood by means of the flue, and having
an outlet-opening in the upper part and a discharging-door
in the lower part, and a fan adapted to create an artificial
draught over the furnace and through the condensing-cham-
ber. (2.) In apparatus for obtaining zinc-oxides from zinc-
ores such as calamines and metallic substances containing
zinc, the combination of wheeled trucks each containing
several electric furnaces, a separate circuit for each furnace
and a switch for controlling the same, a fixed hood for each
furnace adapted to cover the same with its lower edge and
provided with air-space all round said lower edge, a charging-
hopper above each hood and a valve to open and close com-
munication between them, a flue to each hood and a damper
adapted to close and open the same, a main flue to which the
flues from the hoods are connected, a condensing-chamber
in communication with said main flue having an outlet-open-
ing in the upper part, a discharging-door in the lower part,
and baffle-screens between said flue and the outlet-orifice,
and a fan adapted to create a draught over the furnace and
through the flues and the condensing-chamber. (3.) In an
apparatus such as is claimed in claims 1 and 2, controlling
the furnaces independently by means of a separate circuit
and switch therein for each furnace. (4.) In an apparatus
such as is claimed in claims 1 and 2, controlling each furnace
by means of a switch and a choking-coil in the circuit thereof.
(5.) In an apparatus such as is claimed in claims 1 and 2, the
use of screens or baffles on the venetian-blind principle formed
of bars or covered frames in the condensing-chamber, arranged
with their edges to face the draught, substantially as de-
scribed. (6.) The improved apparatus for obtaining zinc-
oxide from substances containing zinc, constructed and ar-
ranged substantially as described, and illustrated in the
drawings.

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

No. 23753.—22nd November, 1907.—JOHN STUART AL-
CORN, of 83 Braintree Street, Boston, Suffolk, Massachusetts,
United States of America, Engineer. Improvements in or
relating to rotary fluid engines or machines.

Extract from Specification.—These improvements in or
relating to rotary fluid engines or machines for propelling
or being propelled by fluids, whether of a liquid or gaseous
nature, have special reference to the type of engine or machine
with a rotary piston and a rotary spacer, having rocking-
shoes or abutments which bear on the peripheral curved
surface of the piston, the piston and the spacer being on
different axes of rotation, and rotating in the same direction
at relatively constant but different rates of speed within an
outer enclosing cylinder wherein the spacer rotates, the spacer
moreover being provided with ports. Now, the present
improvements consist in making the spacer with entirely
cylindrical outer circumference, and the casing or housing
non-cylindrical; in the arrangement of the packings between
the piston and the spacer and between the latter and the
outer enclosing cylinder wherein it rotates; in means for
enabling the engine to start from any position of the rotating
parts, thus doing away with so-called dead points; and in
means for reversing the direction of rotation, if so required.
By these improvements the engine is much improved in general
construction and in the economical use of steam.

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

(Specification, 13s. 3d.; drawing, 4s.)

No. 23757.—25th November, 1907.—ARTHUR ISABERT
CARR, of Wharekopae, Poverty Bay, Auckland, New Zealand,
Fencer. Improvements in and relating to fencing-stand-
ards.

Claims.—(1.) A fencing-standard made of sheet metal
bent into a tee shape, flanges integral with and perpendicular
to the horizontal members, grooves in the flanges to receive
the fencing-wires, and staples embracing the wires and passing
through holes in the standard and clenched at the back
thereof, substantially as set forth. (2.) A fencing-standard
constructed as described in claim 1, and anchored as de-
scribed, substantially as set forth. (3.) The combination
and arrangement of parts comprising the improvements in
and relating to fencing-standards, substantially as and for
the purposes set forth, and illustrated in the drawing.

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

No. 23764.—27th November, 1907.—AUGUST SODERLING,
of Bodie, Mono, California, United States of America, Chemist.
Improvements in and relating to the treatment of ores and
tailings.

Claims.—(1.) Apparatus for preliminary treatment of tail-
ings and slimes, consisting of an inclined riffled trough or
conductor having at its upper end a water-supply, and pulver-
ising-rolls, and a tank holding a weak solution of solvent
acids or acid salts, a dilution water conductor near the lower
end of said trough, and at its lower end settling-reservoirs
for sands and for slimes, final reservoirs for base-metal solu-
tions, and separate terminal reservoirs for the sand and
for the slimes, substantially as specified. (2.) Apparatus for
the treatment of tailings and slimes preliminary to cyaniding,
consisting of an inclined riffle-bottom trough or conductor,
at the upper end thereof a water-supply, pulverising-rolls,
and a tank for a weak solution of solvent acids or acid salts,
at the lower end thereof settling-reservoirs for sands and
slimes, and an intermediate water-discharge near the settling-
reservoirs, substantially as specified. (3.) The art or process
of treating tailings and slimes preparatory to the cyaniding
by pulverising a hydraulic flux of the same, mixing therewith
a weak solution of acid or acid salts, agitating the mixture
in flow from a higher to a lower level, further diluting the
mixture, separating the residual sands and slimes from the
impregnated waters, drawing off the latter through a series
of reservoirs containing precipitating reagents, leaving the
settled sands and slimes in condition for cyanide treatment,
substantially as specified. (4.) In apparatus for the treat-
ment of tailings and slimes preliminary to cyaniding, the com-
bination with a hydraulic discharge-pipe, pulverising-rolls,
and an acid-solution tank, of settling and terminal reservoirs
at a lower level, inclined sluicing-troughs, and detachable
sectional riffle bottoms in said troughs, substantially as
specified.

(Specification, 7s.; drawing, 3s.)

No. 23766.—27th November, 1907.—JOHN LEAHY, of
Queen’s Chambers, Queen’s Place, Sydney, New South
Wales, Australia, Shearing Contractor (assignee of John
William Sutton, of Phoenix City, Arizona Territory, United
States of America, but now temporarily of Sydney afore-
said, Shearer). Improvements in sheep-shearing machines.

Claims.—(1.) In a sheep-shearing machine, a pressure
spring or springs having two or more points of contact with
the cutter attached to the fork, and transmitting pressure
between the fork and the cutter. (2.) The pressure spring
or springs for use in a sheep-shearing machine, substantially
as described, and illustrated in the drawing. (3.) In a
sheep-shearing machine, the combination of a pressure spring
or springs having two or more points of contact with a re-
ciprocating lever interposed between the outer end of such
lever and the cutter, such reciprocating lever being pivoted
on a centre at its inner end, and of a rotating crank by
which said lever is reciprocated at its middle part, and of a
roller upon such crank-pin, and of a cutter carried upon the
end of such crank, and of a tension screw with suitable