Nov. 28.] THE NEW ZEALAND GAZETTE. 2309

Claims.—(1.) A roller mill for grinding and crushing
whereof the rolls are of truncated concavo-conical form, and
are so mounted, the one partially above the other, that
their axes lie obliquely across each other—that is to say,
in parallel horizontal, but different vertical planes oblique
to each other, so that the planes of rotation of the rolls
will be mutually oblique, and a disruptive or tearing action
in addition to a crushing action will be produced, the rolls
being coned towards the same side of the machine, so that
their line of contact or “bite” is continuous and sub-
stantially horizontal from end to end of the rolls, as
described. (2.) In a roller mill for grinding and crushing,
the combination with rolls of truncated conoidal form par-
tially superposed the one over the other, and having their
axes lying obliquely to one another in parallel horizontal
planes, of a substantially horizontal lever-frame wherein
the upper roll is journalled at a point intermediate between
the lever-fulcrum and the load, the relative position of the
lower roll, the upper roll, and the fulcrum of the lever-frame
being such that the upper roll will, in consequence of the
wedge-like action relatively to the lower roll and the lever-
fulcrum, exert a crushing pressure equal to a high multiple
of the actual load.
(Specification, 7s.; drawings, 3s.)

No. 14107.—7th October, 1901.—ROBERT WEBSTER, of
Southbridge, New Zealand, Blacksmith and Engineer. An
improvement in coulters for sowing seed.

Claims.—(1.) In the construction of coulters for sowing
seed, dividing the coulter into two compartments by means
of a partition so that the manure-tube coming from its
hopper shall enter one part while the seed-tube enters the
other, as described, and for the purposes set forth. (2.) The
combination with the hopper and tubes of combined seed-
and-manure drills of a coulter that is divided into two parts
by a partition so that the manure shall fall to earth before
its accompanying seed, substantially as described and illus-
trated.
(Specification, 1s. 3d.; drawings, 1s.)

No. 14134.—18th October, 1901.—HENRY JOHNSON, of 129,
Blyth Street, Brunswick, Victoria, Steel-founder, and
GEORGE WILLIAM FRIER, of 65, Haines Street, Glenferrie,
Victoria, Merchant. Improvements in the process of manu-
facturing steel.*

Claims.—(1.) In the process of manufacturing steel,
furnishing the tap-hole or delivery-mouth of cupola or blast
furnace with a trap to prevent slag passing therefrom with
the molten metal to the refinery or converter, substantially
as described and shown. (2.) In the process of manufactur-
ing steel, the combination of a feed-metal-heating furnace
with a closed-top refinery or converter, said furnace being
heated by the heated waste gases and products of combustion
which pass to it direct from converter, as and for the pur-
pose described, and substantially as shown. (3.) In the pro-
cess of manufacturing steel, connecting the upper part of a
refinery or converter by a mouth or flue direct with a feed-
metal-heating furnace, substantially as and for the purpose
described, and substantially as shown. (4.) In the process
of manufacturing steel, connecting the tap-hole of the con-
verter or refinery with the hearth of a grader or regenerating-
furnace by a suitable channel, in order that said regene-
rating-furnace may be fed with molten metal, as and for the
purpose described, and substantially as shown. (5.) In the
process of manufacturing steel, the combination of a cupola,
a refinery or converter, and a feed-metal-heating furnace,
connected and arranged substantially as described and
shown. (6.) In the process of manufacturing steel, the
combination of a refinery or converter, a feed-metal-heating
furnace, and a grader or regenerating-furnace, all connected
and arranged substantially as described and shown. (7.) In
the process of manufacturing steel, the combination of a
cupola or blast furnace having a trapped outlet, a refinery or
converter, a feed-metal-heating furnace, and a grader or
regenerating-furnace, all connected and arranged substan-
tially as described and shown.
(Specification, 6s. 6d.; drawings, 2s.)

No. 14175.—31st October, 1901.—JOHN FREDERICK ROSE,
of Takaka, Nelson, New Zealand, Farmer. Protection
of river-banks or other lands subject to being washed away
by rivers or watercourses, and for the diverting of rivers or
watercourses so that they may be conducted in a straight
course and so maintained.

Claim.—Protecting river-banks by means of groins or
piers built at an angle down stream on the opposite bank of
river or watercourse to that which is to be protected; and
also, by same means, conducting the river or watercourse in
such direction—straight or otherwise—as may be desired.
(Specification, 1s. 6d.)

No. 14183.—30th October, 1901.—HENRY CECIL WRIGHT,
Solicitor, and REGINALD BAYLEY, Draughtsman, both of New
Plymouth, New Zealand. Improved golf-club heads.

Claim.—The substitution of gutta-percha for wood in the
manufacture of golf-club heads, as and for the purpose
described in the specification.
(Specification, 1s.)

No. 14214.—12th November, 1901.—HENRY DURELL
CRIPPEN, of 231, West Ninety-sixth Street, New York, United
States of America, Manufacturer (assignee of George Seymour
Maxwell, of 318, Main Street, Madison, New Jersey, United
States of America, Electrical Engineer, and George White,
of 81, Oak Street, Jersey City, New Jersey aforesaid, Me-
chanical Engineer). Improvements in and relating to rock-
drills.

Extract from Specification.—This invention relates to a
rock-drill of the percussive type, and is an unitary device,
complete in itself, with all the parts enclosed in a single
compact case. It consists essentially of two elements—the
motor element or motor, and the drill element or drill—the
motor maintaining a fixed position in the case, while the
drill is fed independently on interior feedways formed in the
case itself. This rock-drill is designed particularly for an
electric motor, to which the current may be brought from
any convenient distance through the usual line-wires. In
any position of the drill element power is communicated
thereto from the motor by a single positive variable connec-
tion; and all the vibrating and reciprocating parts are ar-
ranged entirely outside of the motor in a supplementary
enclosing shell, so separated from the motor and yet enclosed
and sustained in a portion of the main case; thus neither
the mechanical nor electrical operation of the motor is dis-
turbed by vibration, shock, or by reciprocation of any parts
between the field-magnets. By a simple adaptation of the
parts, a single motor may be combined to operate two drill
elements in a single case, the drill elements being operated
independently or together, simultaneously or alternately.
The important details of our rock-drill are the integral case
enclosing the magnets and the suitably journalled armature,
having an integral extension or extensions provided with
ways for the drill element or elements, comprising the bit,
ram, spring or springs, operative cams, shells enclosing the
respective cams, and means for rotating the bit a fixed dis-
tance at each stroke independent of the length of the stroke;
a single crank is preferably used, adapted in one position,
through one set of connections, to vary the distance between
the cams and to turn on the current at the proper time
through a convenient arrangement of electrical connections,
and in a second position, through a second set of connec-
tions, to feed the drill in and out. The complete rock-drill
is suitably supported, with a low centre of gravity, on a
special base, insuring stability and permitting the bit to be
removed conveniently without affecting the alignment.
Most of these improvements may be used with other than
electrical power.

[NOTE.—The number and length of the claims in this case
preclude them from being printed, and the foregoing extract from
the descriptive part of the specification is inserted instead.]
(Specification, £1 13s.; drawings, 5s.)

No. 14215.—13th November, 1901.—FREDERICK WILLIAM
MARTINO, of 21, Parker’s Road, Broomhill, Sheffield, York,
England, Manufacturer. An improved barium compound,
its method of manufacture, and its application in the ex-
traction of the noble metals.

Claims.—(1.) As a new article of manufacture, the sub-
stance referred to as barium-sulpho-carbide. (2.) The pro-
cess of manufacturing barium-sulpho-carbide by fusing a
mixture of barium-sulphate and carbon in an electric fur-
nace. (3.) The employment of barium-sulpho-carbide in the
extraction of the noble metals. (4.) The application of
barium-sulpho-carbide as a precipitant in the recovery of
metals whose sulphides are insoluble from solutions contain-
ing them. (5.) The application of barium-sulpho-carbide as
a precipitant in the recovery of gold from its cyanide,
chloride, or bromide solutions, and silver from its cyanide
and nitrate solutions. (6.) The process of recovering gold
from its cyanide solution consisting in acidifying the solu-
tion, and treating it at a raised temperature with barium-
sulpho-carbide. (7.) The process of separating the noble
metals from ores containing tellurium, selenium, sulphur,
arsenic, antimony, tin, phosphorus, or the like, consisting in
heating the mixture with barium-sulpho-carbide and then
treating it with water. (8.) The process of separating gold
from ores containing tellurium, selenium, sulphur, arsenic,
antimony, tin, phosphorus, or the like, consisting in grinding
the mixture, heating it with powdered barium-sulpho-car-
bide in a reducing-furnace, and then dissolving out the
soluble sulphides thus formed. (9.) The process of separating
gold from ores containing tellurium, selenium, sulphur,