2242
THE NEW ZEALAND GAZETTE.
[No. 77

for simultaneous inspection and identification of the primary
and secondary cards, as described and illustrated. (4.) The
combination with a primary and secondary card of an in-
folding corner, common to both cards, and arranged to dis-
close the existence of the secondary or reply card, as described
and illustrated.
(Specification, 4s. ; drawing, 1s.)

No. 18271.—4th August, 1904.—WASHINGTON GARLAND
RIFENBURG, of San Francisco, United States of America.
Combined muller and amalgamator.

Claims.—(1.) In machines for the separation of metals
from pulverised ore and sand, an amalgamator and a muller,
the two being arranged for co-operation, substantially as
described. (2.) In a machine of the character described in
claim 1, an amalgamator-casing, a fixed die in the casing, a
muller-casing supported from the amalgamator - casing, a
shoe carried by the muller-casing, and a funnel connected with
an opening in the said shoe, the shoe being adapted for
rotary movement in the die, substantially as described.
(3.) In the construction of the kind set forth in claims
1 and 2, a central conical opening in the die, a flange forming
a wall of the said opening, a marginal flange, the opposing
walls of the two flanges being oppositely inclined toward
pockets in the upper face of the die, the shoe of the muller
being fitted to the said flanges yet spaced therefrom, sub-
stantially as described. (4.) In a machine of the character
described in claims 1, 2, and 3, an offtake from the upper
portion of the amalgamator casing or shell, and a cone ex-
tending from the bottom of the amalgamator section through
the central opening in the die and into the funnel, sub-
stantially as described. (5.) In machines for the separation
of metals from pulverised ore and sand, the amalgamator-die
provided with flat upper and lower faces, a central conical open-
ing, an inclined annular flange around the central opening,
and an inclined flange at the margin of the die, the flanges
extending in the same direction, and pockets for mercury
radially located in the upper face of the die between the
flanges, substantially as described. (6.) In the character of
machine described in claim 5, the die constructed in de-
tachable sections, substantially as described. (7.) In ma-
chines for the separation of metals from pulverised ore and
sand, a fixed shell having an upper outlet, a die held
stationary in the shell having a central opening, a cone ex-
tending up from the bottom of the fixed shell through the
said central opening of the die, the said central opening of
the die being surrounded by an inclined inwardly extending
circular flange, a marginal flange for the die having an in-
clined inner face, the upper face of the die between the
flanges being provided with radial pockets adapted to receive
mercury, and a muller of less diameter than that of the fixed
shell, the shoe of which is loosely fitted in the space between
the flanges of the die, the bottom of the shoe of the muller
being flat, means for turning the muller, and a conductor of
material carried by the muller and directed to the spaces
between the shoe of the muller and the die, substantially as
described.
(Specification, 7s. ; drawings, 2s.)

No. 18273.—4th August, 1904.—JOSEPH GEORGE NASH,
of Hindmarsh Square, Adelaide, South Australia, Australia,
Engineer. Improvements in gas-producers.

Extracts from Specification.—A is the first chamber, con-
structed in the ordinary way, and lined with firebricks A¹ or
other refractory material. This chamber A is provided with
a grate A², a well A³, and inlets A⁴ for the introduction of
an air-blast. The chamber A communicates with a further
chamber B by means of a horizontal flue B¹. This second
chamber B is also lined with firebricks B² or other refractory
material. The first chamber A is adapted to maintain a
column of solid fuel, which, when fired, becomes incan-
descent, and into this incandescent body the bituminous
coal is fed preferably in a small or semi-powdered condition.
The coke coming into the body of incandescent coal is split
up into its constituent gases, and when two chambers are
provided (as shown in the drawings) the said gas is passed
out through the column of coke arranged in the second
chamber B. The top of the chamber A is provided with
a casting which contains in one and the same piece an
improved feed-device and a mounting for a poking-rod
as hereinafter described. This casting consists of a cen-
tral casing C (preferably conical-shaped as shown) which
delivers into the open top of the chamber A. The feed-
ing-device consists of a hopper C¹, having a conveyer-
screw C², which discharges through openings C³ in the
side of the central casing C. . . . I also provide
a feeding device or devices arranged upon the side of
the producer-chamber A. This feeding-device consists
of a cylinder F arranged upon the side of the chamber A,

and discharging into the interior thereof at a short dis-
tance above the grate and at about the point which forms the
zone of highest temperature on the body of incandescent
fuel. . . . In operation the coal is fed in through
the hopper G into the cylinder F, and is passed forwards by
means of the reciprocating piston or plunger J. In this way
the coal is automatically and continuously delivered into the
centre of the body of incandescent fuel within the cham-
ber A at about the zone of highest temperature. The coal
being delivered into the body of incandescent coke at this
point, the tar and other elements which produce impurities
are split up by the excessive heat into constituent gases,
with consequent increase of the gas generated. At the same
time the poking-rod J¹ may be used for breaking up the body
of incandescent coke, and admitting of the entrance thereto
of the coal as fed in through the cylinder F. By reference to
the drawings it will be seen that the feeding-device is shown
arranged at a slight angle inclined upwards for the purpose
of giving the coal an upward thrust as fed into the interior
of the chamber A ; but it will be well understood that this
feeding-device may be arranged at any angle as may be most
convenient in practice.
[NOTE.—The above extracts from the specification are inserted
in place of the claims.]
(Specification, 11s. ; drawing, 1s.)

No. 18287.—9th August, 1904.—ISAAC SHOOB, of 128,
Wardour Street, London, W., England, Watchmaker and
Jeweller. Improvements in burners for incandescent gas
light or heating purposes.

Claims.—(1.) An improved gas-burner having a mixing-
cone arranged and enclosed within an air-chamber, such
chamber being provided with upper air-inlet openings, sub-
stantially as and for the purposes described, and as illustrated
in Figs. 1 and 2 of the drawings. (2.) An improved gas-
burner for heating or lighting purposes, constructed and
arranged substantially as described with reference to Figs. 4
and 5 of the drawings. (3.) An improved gas-burner for
heating or lighting purposes, constructed and arranged sub-
stantially as described with reference to Fig. 6 of the draw-
ings.
(Specification, 6s. ; drawings, 3s.)

No. 18289.—5th August, 1904.—COSMANN NETTHEIM, of
the firm of Farleigh, Nettheim, and Co., of 80, Clarence
Street, Sydney, New South Wales, Australia, Leather-mer-
chant ; and RICHARD STEELE, of 40, Porter Street, Waverley,
near Sydney aforesaid, Factory-manager. An improved boot.

Claims.—(1.) An improved boot wherein the front of the
upper overlaps the edges of the back of the upper and is
jointed thereto by sewing or the like in a line running up-
wardly and forwardly from the sole, substantially as described
and explained. (2.) An improved boot constructed of the
parts substantially as specified in the preceding claiming
clause, and having straps from the front of the upper meeting
and fastening without passing around the front, substantially
as described and explained. (3.) An improved boot con-
structed of a front piece and a back piece of the cut or
pattern and joined as set forth, substantially as described and
explained, and as illustrated in the drawings.
(Specification, 2s. 9d. ; drawings, 2s.)

No. 18290.—9th August, 1904.—JAMES THOMAS HUNTER,
of Queen’s Chambers, Wellington, New Zealand, Registered
Patent Agent (nominee of George Laird, of “Greylands,”
Ashton-on-Mersey, and John Percival Todd, of 21, Stevens
Street, Stretford, both in Lancaster, England, Electrical
Engineers). Improvements in controllers for electric motors
and other apparatus.

Claims.—(1.) A device for automatically breaking a main
circuit, either when the current exceeds a predetermined
limit or when the voltage falls below a prearranged value, in
which both a main-circuit switch adapted to be closed by
the current in a coil connected in shunt with the main circuit
and also a switch arranged in the said shunt-coil circuit are
opened either by an excessive current in an overload coil ar-
ranged in the main circuit or by the partial or complete de-
energizing of the shunt coil, so that the circuit through the
main switch will not be automatically restored when the
overload ceases or when the voltage rises to its normal value,
substantially as described. (2.) The modification of the in-
vention in which a branch circuit is provided in the shunt
coil connected to contacts on a controller so arranged that
the branch circuit cannot be closed and the shunt coil ener-
gized to close the main switch except when the controller is