2490
THE NEW ZEALAND GAZETTE.
[No. 81

stereotyper's foot and turned by his hand. The first part of
the present invention relieves the stereotyper of the labour of
so turning the core, by providing a constantly rotating
driving-gear, and interposes between the said gear and the
above-mentioned core a normally open clutch fitted with a
hand-clutch lever which carries a device for automatically
locking the core; so that when the stereotyper wants the
latter to be turned, all that he has to do is to move the
clutch-lever with his hand, because that movement unlocks
the core and closes the clutch and also because the clutch is
opened and the core locked, both automatically, as soon as
the core has been turned far enough. The second part
of the invention provides an audible annunciator adapted to
tell the stereotyper when the newly cast stereotype is cool
enough to allow of the mould being opened and the core
turned.

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

(Specification, 7s. 6d.; drawing, 3s.)

No. 21070.—2nd May, 1906.—DONALD GEORGE McKENZIE,
of Room 3, Fairfield Block, Vancouver, British Columbia,
Canada, Miner. A change-giving register.

Extract from Specification.—The device comprises a series
of coin-holding magazines, into which payments are made by
the salesman, and from which change is given as required by
means of a coin-ejecting slide in the base of each magazine.
The determination of what particular coin-slides shall be
projected to deliver change is under a dual control, and is
determined—first, by a series of lock and release discs co-
operative with the mechanism, by which the amount of the
sale made is announced and registered; and, second, by a
latch-release of such coin-slides as are necessary to make up
the change from a particular coin given, which release
is effected by a finger-key opposite each coin-slide. The
necessity for such dual control will be apparent to any one
who has given the matter attention, but need not be enlarged
upon here. The release of the coin-slides by the finger-keys
enables them to effect the release of a change-delivery
drawer beneath, into which the required change falls, and
the drawer is outwardly projected by a spring or springs to
deliver the change to a purchaser.

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

(Specification, 15s.; drawing, 3s.)

No. 21077.—4th September, 1905.—WILLIAM BLACKMORE
and ALFRED HOWARD, both of 5 Bishopsgate Street Within,
London, England, Consulting Chemists and Metallurgists.
Improvements in the treatment of pyritic ores containing
gold, silver, or other valuable metals.

[NOTE.—This is an application under section 106 of the Act, the
date given being the official date of the application in Great
Britain.]

Claims.—(1.) A process for the treatment of pyritic ores
for the recovery of valuable metals contained therein, con-
sisting of the roasting of the pulverised ore at a temperature
of about 800° F. in the presence of an oxidizing agent
consisting of air and steam, so as to convert the sulphide
of iron into normal or basic sulphate of the leaching of the
ore in acid liquors to dissolve the iron sulphate, and of the
separation of the solution from the solid residue containing
the valuable metals, substantially as described. (2.) In a
process for the treatment of pyritic ores for the recovery of
valuable metals contained therein, consisting of the roasting
of the pulverised ore at a temperature of about 800° F.
in the presence of an oxidizing agent consisting of air and
steam, so as to convert the sulphide of iron into normal
or basic sulphate of the leaching of the ore in acid liquors to
dissolve the iron sulphate, and of the separation of the
solution from the solid residue containing the valuable
metals, the collection of the sulphurous gases evolved by the
roasting treatment and their absorption by water to be used
as the acid liquors in the process of solution of the iron
sulphate, substantially as described. (3.) A process for the
treatment of pyritic ores containing cobalt, copper, or nickel,
consisting of the roasting of the pulverised ore at a tempera-
ture of about 800° F. in the presence of an oxidizing agent
consisting of air and steam, so as to convert the iron, copper,
cobalt, or nickel into sulphates, the leaching of those
sulphates in liquors containing sulphuric acid, and the
treatment of the said liquors by precipitants to recover the
metals therefrom, substantially as described.

(Specification, 4s.)

No. 21104.—5th May, 1906.—FRANK BURKE, Carpenter,
and HUGH LAING MAINLAND, Mechanical Engineer, both of
Burke's, near Dunedin, New Zealand. Attachment for
kitchen-ranges to use as open fires, or as improved open-fire
casings for huts.

Claims.—(1.) An attachment to kitchen ranges or stoves,
consisting of an open-fronted box ending upwards in a short
flue, the whole extending from the range top to and through
the sheet iron u-ual register over the range, for the purpose
of collecting and conducting the smoke to the main chimney,
said box and flue being apart from the usual short flue
in ranges when used for cooking, said box and flue being in
combination with splayed flaps, a hood and a damper, all
substantially as shown on the drawing, and as described
and explained. (2.) As a casing for hut fireplaces, an open-
fronted box ending upwards in a flue or chimney of con-
venient height, combined with a hood made for flashing to
said hut walls, and the whole furnished with a damper if
needed, all substantially as set forth, and for the purposes
described.

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

No. 21220.—26th May, 1906.—THE AUSTRALASIAN COAL
BRIQUETTE COMPANY (LIMITED), of Margaret Street, Sydney,
New South Wales, Australia (assignees of George Leonard
Croudace, of Glassop Street, Balmain, near Sydney afore-
said, Engineer). Improved manufacture of coal briquettes.

Claims.—(1.) In the manufacture of coal briquettes, a
thin pasty mixture composed of about 50 lb. of starch and
(or) flour and (or) ground cereals mixed first with cold and
then with boiling water, about 10 gallons of such mixture
being then incorporated with 1 ton of ground coal, as set forth.
(2.) In the manufacture of coal briquettes, a thin pasty
mixture composed of about 50 lb. of starch and (or) flour and
(or) ground cereals mixed with cold and then with boiling
water, about 10 gallons of such mixture being then in-
corporated with 1 ton of ground coal, a small proportion of
ground lime and (or) a small quantity of silicate of soda may
be added as required, as specified. (3.) In the manufacture
of coal briquettes, a pasty mixture consisting of starch and
(or) flour and (or) ground cereals, to which oil and (or) lime
and (or) silicate of soda may be added, the whole being in-
corporated with a large proportion of pulverised coal, after
which the mixture will be placed in a powerful press, sub-
jected to heavy pressure, and then dried by exposure or by
artificial heat, as specified.

(Specification, 2s. 6d.)

No. 21333.—22nd June, 1906.—ALBERT JOHN FORTESCUE,
of Arncliffe, near Sydney, New South Wales, Australia,
Manufacturer. Improvements in sectional wheel-tires.*

Claims.—(1.) In sectional wheel-tires the combination
with a projection under each end of one or more sections, of
a bridge-piece holding behind said projections and against
the ends of the rim-sections. (2.) In section wheel-tires the
combination with a projection under each end of one or
more sections, of a bridge-piece having stops which hold
against said projections and against the ends of the rim-sec-
tions, substantially as described. (3.) In sectional wheel-
tires the combination with a projection under each end of
one or more sections, of a bridge-piece having stops which
hold against said projections and against the ends of the rim-
sections and loose liners on the inner or outer faces of said
stops, substantially as described and illustrated. (4.) In
sectional wheel-tires the combination with a projection
under each end of one or more sections, of a bridge-piece
provided with stops which take against said projections and
against the ends of the rim-sections, a plug or spacing piece
between the ends of the tire and with or without bolts for
retaining said bridge-piece in position, substantially as de-
scribed and illustrated.

(Specification, 3s. 6d.; drawings, 2s.)

No. 21376.—26th June, 1906.—PERCIVAL JAMES GOSSLING,
of Auckland, New Zealand, Commission Agent. A writing-
paper advertising medium.

Claims.—(1.) The writing-pad advertising medium speci-
fied, consisting of interleaving between sheets of writing-
paper held in a pad, other or thinner sheets of paper having
printed, embossed, or otherwise depicted thereon advertise-
ments for the purpose set forth, substantially as described.
(2.) The printing, embossing, or otherwise depicting advertise-