3654
THE NEW ZEALAND GAZETTE.
[No. 90

employed to rock a coherer to obtain decoherence, means for
obtaining a dwell at one end of the rocking movement, to
allow time for coherence, comprising a relay adapted to control
the field circuit of the motor device, which relay is located in a
circuit automatically opened and closed, and is adapted to
hold the field circuit closed an appreciable time after the relay
circuit is broken, substantially as described.

[NOTE.—Here follow eleven other claims.]

(Specification, 14s.)

No. 28266.—16th August, 1910.—ALBERT HENRY MIDGLEY
and CHARLES ANTHONY VANDERVELL, both of Acton Vale,
Middlesex, England, Electrical Engineers. Improvements in
dynamo-electric machinery.

Extract from Specification.—Consists of a dynamo-elec-
tric machine in which the brushes for collecting the useful
current are arranged in such a position that the coil or
coils of the armature short-circuited by the said brushes
are in an active zone where they are cutting an initial magnetic
flux due to wound poles, and the current thus generated in
the short-circuited coils, as distinguished from the working-
current which flows through the armature from brush to
brush, acts to distort the said initial magnetic flux in a manner
hereinafter explained in order to accomplish self-regulation.

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

(Specification, 7s.)

No. 28267.—13th May, 1910.†—WILLIAM WOODWARD RO-
BACHER, of Rochester, New York, U.S.A., Manufacturer.
Improvements in or relating to filtering-apparatus particularly
intended for the cyanide process of extracting precious metals
from their ores.

Extract from Specification.—Both side walls of the filtering-
wheel are of porous mineral material, so that both side sur-
faces of the wheel form actual filtering-surfaces. A scraper
is provided for each such side or filtering-surface. The in-
terior of the drum is divided, by approximately radial par-
titions (which also form spokes of the wheel), into a plurality
of segmental chambers, closed at the periphery, ducts being
provided leading from these segmental chambers to an axial
passage in the axle of the wheel, the several ducts being in
different planes of rotation, so that filtrate passing through
one of the ducts into the axial passage mentioned will not pass
directly into another similar duct of the wheel.

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

(Specification, 9s. 3d.)

No. 28268.—13th May, 1910.†—WILLIAM WOODWARD RO-
BACHER, of Rochester, New York, U.S.A., Manufacturer.
Improvements in or relating to filtering-apparatus particu-
larly intended for the cyanide process of extracting precious
metals from their ores.

Extract from Specification.—According to my present in-
vention the porous mineral-filtering body constitutes not a
side wall of the drum or wheel but the peripheral wall thereof ;
a scraper being provided in proximity to this wall, which
scraper, during the rotation of the wheel or drum, scrapes
from the filtering-surface the layer of solid material accumu-
lating thereon.

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

(Specification, 7s. 9d.)

No. 28284.—17th August, 1910.—ADAM WERNER, of
Doyleston, New Zealand, Engineer. An improved elevator
and band-cutter to be attached to combine threshing-ma-
chines.

Extract from Specification.—According hereto an endless
travelling apron works within a trough, which is mounted
at one end so that it may be swivelled in any direction, and
its free end raised and lowered as required. The raising,
lowering, and swivelling of the trough is effected by means
of a crane or hoist secured in a convenient position to the
frame-work at the top of the combine. Near the top of the
trough the sheaves are compressed by a small endless canvas,
and below this compressing-canvas knives are provided for
cutting the bands of the sheaves.

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

(Specification, 6s.)

No. 28285.—17th August, 1910.—THE INTERNATIONAL
AUTOMATIC RAILWAY-SWITCH COMPANY, of 1st Avenue and
20th Street, Birmingham, United States of America, Manu-
facturers (assignees of Harold Shemwell, of 1st Avenue and
20th Street, Birmingham, aforesaid, Gentleman). Switch-
throwing mechanism.

Claims.—(1.) A railway-switch-operating device of the type
in which a vertically and horizontally movable switch-throwing
lever is provided, which is adapted to be both lifted and
laterally shifted by the car, characterized by the fact that
spring means are provided for locking the switch-throwing
lever in either of its lateral operating positions, said spring
means being connected to the lever in such a manner as to
also yieldingly oppose its vertical movement.

[NOTE.—Here follow two other claims.]

(Specification, 7s. 3d.)

No. 28288.—18th August, 1910.—THOMAS WILLIAM HAN-
NAM, of Whangarei, New Zealand, Builder. Improved means
for drying stones, gravel, and other material.

Claims.—(1.) In means for the purpose set forth, the
combination with a furnace stack or flue of a chamber, ar-
ranged longitudinally therein, and with a space all round
between it and the stack, a charging-chute leading through
the side of the stack into the top end of such chamber, and a
discharging-chute leading from the bottom end of the chamber
through the side of the stack, substantially as specified.
(2.) The improved means for drying stones, gravel, and other
material, substantially as described and explained, and as
illustrated in the drawings.

(Specification, 2s. 6d.)

No. 28292.—19th August, 1910.—JOHN DUFFILL, of Ingle-
wood, New Zealand, Contractor. Improvements in ap-
paratus for constructing concrete buildings.

Claims.—(1.) Apparatus for the purpose indicated, com-
prising cross-pieces carrying mould-boards, cords attached
to the cross-pieces and passing over pulleys mounted upon a
scaffold, and counterweights attached to the ends of the cords,
substantially as set forth. (2.) For the purpose indicated,
cross-pieces, mould-boards attached by brackets to the
cross-pieces by screwed ends upon the brackets and by bolts
passing through struts of the brackets, and plates connecting
the screwed ends to the bolts, substantially as set forth.

[NOTE.—Here follow eight other claims.]

(Specification, 7s. 9d.)

No. 28296.—18th August, 1910.—CHARLES GRAHAM, of
Clinton, New Zealand, Farmer. Improvements in animal-
traps.

Extract from Specification.—The chief alterations in my
invention are—making the spring integral with the base-
piece of the trap, pivotally connecting the jaws to each other
and to lugs formed on or attached to the base-piece, and the
end of the spring embracing the jaws is bent to form an
angle section for increased strength, and to expose the least
surface for engagement with the jaws.

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

(Specification, 2s. 9d.)

No. 28305.—23rd August, 1910.—EUGENE JACQUES ROESCH,
of 46B Clanricade Gardens, London, England, Journalist
(assignee of Alonzo H. Burchard, of Martinsburg, United
States of America, Engineer). Improvements in and relat-
ing to the treatment of petrol for use in explosion engines.

Claims.—(1.) The method of increasing the efficiency of
petrol for the purpose specified, consisting in the use of ap-
paratus substantially as described. (2.) A device or apparatus
for insertion in the petrol-tank of motor-vehicles or other
power apparatus for the purpose of improving the petrol,
said apparatus consisting of a plurality of copper and zinc
plates, substantially as described. (3.) For the treatment of
petrol for use in an explosion engine, apparatus constructed
and arranged substantially as described with reference to
the drawing.

(Specification, 3s.)