1802
THE NEW ZEALAND GAZETTE.
[No. 62

sequently effecting the separation of the salt and foreign
matters, or residual solid impurities in it, by causing it to
remain quiescent while in a molten state, for the purposes
set forth. (3.) In the manufacture of white salt from dis-
coloured or impure rock salt, the described process; consisting
of melting the discoloured or impure rock salt in one vessel
or furnace; removing the molten salt to another vessel;
subjecting the molten salt in said other vessel, or in the first
vessel or furnace, or in both, to the action of air forced
through it; and separating the foreign matters or residual
solid impurities from the purified salt in the said other
vessel, by causing it to remain quiescent in such vessel; sub-
stantially as set forth. (4.) Effecting the manufacture of
white salt from discoloured or impure rock salt by and in an
apparatus as set forth and shown, and by treating it in the
manner as set forth.
(Specification, 3s. 6d.; drawing, 1s.)

No. 18052.—16th June, 1904.—JOHN ALFRED MERRETT,
of care of Joseph Nathan and Co., Merchants, of Wellington,
New Zealand, Engineer. An improved hinge for the doors
of cold-stores and the like.

Claims.—(1.) A hinge for the purpose indicated, compris-
ing, in combination, a part secured to the door, a knuckle
joint pivotally connecting said part to a bracket, a bracket
having an eye at its outer end, a boss having an upwardly
projecting pivot-pin received by said eye, and means for secur-
ing said boss to the freezing-chamber, substantially as and for
the purposes specified, and illustrated in the drawing. (2.) A
hinge for the purpose indicated, comprising, in combination,
a part secured to the door, a knuckle joint pivotally connect-
ing said part to a bracket, a bracket having an eye at its outer
end, a boss having an upwardly projecting pivot-pin received
by said eye, a bolt securing the boss to the freezing-chamber,
and pointed pins projecting from the inner face of said boss,
substantially as and for the purposes specified and illustrated.
(3.) A hinge for the purpose indicated, consisting of the parts
arranged, combined, and operating substantially as and for
the purposes specified, and illustrated in the drawing.
(Specification, 2s.; drawing, 1s.)

No. 18056.—17th June, 1904.—ARTHUR REGINALD ANGUS,
of Barry Street, Neutral Bay, New South Wales, Australia,
Solicitor; and HEBER MAXWELL LAUGHER (commonly
known as Heber Lockyer), of Alfred Street North, Sydney,
New South Wales aforesaid, Agent (assignees of Robert
Massey, of Alfred Street North, Sydney aforesaid, Mechanical
Engineer). A new device for enabling railway-cars to travel
over railway-lines of varying gauges.

Claims.—(1.) In a device for enabling railway-cars to
travel over railway-lines of varying gauge, the combination
with each wheel of the car of an axle provided with two
bearings, one on each side of the wheel, such axle having
a collar or flange at its inner extremity and being capable
of longitudinal movement in its bearings, substantially as
described, and illustrated in the drawings. (2.) In the said
device, the combination with each other of two independent
axles disposed in the same straight line, each such axle
carrying a wheel and provided with two bearings, one on each
side of such wheel, the said axles being capable of longitudinal
movement in their bearings, and each terminating in a collar
or flange at its inner extremity, substantially as described,
and illustrated in the drawings. (3.) In the said device, the
construction of a locking-box for the reception of locking-
pieces, the said locking-box being formed by rigidly connect-
ing the inner bearing-blocks of the railway-car with each
other by steel plates, the surfaces of the said plates being dis-
posed parallel to the bottom of the car, substantially as de-
scribed, and illustrated in the drawings. (4.) In the said
device, the combination with the locking-box of two locking-
pieces lying within the locking-box, the said locking-pieces
having semicircular grooves and flange-seats on their inner
sides and being pressed against each other by springs attached
to the locking-box, substantially as described, and illustrated
in the drawings. (5.) In the said device, the combination
with two independent axles disposed in the same straight
line and having collars and flanges at their inner extremities,
of locking-pieces enclosed in a locking-box constructed as
described, the said locking-pieces being pressed against each
other by springs attached to the locking-box and having on
their inner sides semicircular grooves loosely fitting the axles,
and flange-seats for the reception of the axle-flanges, sub-
stantially as described, and illustrated in the drawings.
(6.) In the said device, an unlocking-bolt, constructed sub-
stantially as described, and illustrated in the drawings.
(7.) In the said device, the combination with the locking-box
of an unlocking-bolt, constructed as described, and passing
through holes or slots in the centre of the upper and lower
plates of the locking-box, the said bolt being provided with
guides affixed to the locking-box and being susceptible of
up-and-down motion in the said holes or slots, substantially
as described, and illustrated in the drawings. (8.) In the
said device, the combination and arrangement of the locking-
box, locking-pieces, and unlocking-bolt, substantially as de-
scribed, and illustrated in the drawings. (9.) In the said
device, the use of an unlocking-slide, constructed as and for
the purposes described, and illustrated in the drawings.
(10.) In the said device, the combination and arrangement of
the unlocking-bolt and unlocking-slide, substantially as de-
scribed, and illustrated in the drawings. (11.) In the said
device, the combination and arrangement of the central
guard-rails with angle-irons affixed to the bottom of the
lower plate of the locking-box, and engaging between the
said guard-rails, substantially as described, and illustrated in
the drawings. (12.) The combination of the several ap-
pliances constituting the said device, substantially as de-
scribed, and illustrated in the drawings.
(Specification, 15s. 6d.; drawings, 1s.)

No. 18063.—21st June, 1904.—JAMES PALMER CAMPBELL,
of 15, Featherston Street, Wellington, New Zealand, Solicitor
(nominee of Henry Chitty, of 2, Norfolk Street, Strand,
London, England, Electrical Engineer). Improvements in
dynamo-electric machines.

Claims.—(1.) An electric machine having a bridge-piece of
magnetic material extending between adjacent pole-tips
furnishing a shunt-path for the magnetic flux and formed of
such a section that in combination with a slot or slots in the
pole-piece a strong magnetizing force may be concentrated
upon the neck or contracted portion formed by said slot or
slots in the leading-pole tip, for the purpose specified.
(2.) The modification of the invention in which the pole-
pieces are provided with slots at both tips so that either of
the necks or contracted portions thus formed can be raised
to the desired degree of saturation at no load by means of the
bridge-piece according to the direction in which the armature
is rotated. (3.) The modification of the invention in which
the bridge-piece diminishes in cross-section from the trailing
side towards the leading side so that the fringing or spreading
of the magnetic flux at the trailing-pole tip may be assisted
as the load increases, while at the leading-pole tip such a
fringing or spreading is limited. (4.) For an electric
machine, means for controlling the distribution of the mag-
netic flux, constructed and operating substantially as de-
scribed with reference to the drawings.
(Specification, 6s. 6d.; drawings, 2s.)

No. 18066.—21st June, 1904.—JAMES PALMER CAMPBELL,
of 15, Featherston Street, Wellington, New Zealand, Solicitor
(nominee of Henry Chitty, of 2, Norfolk Street, Strand,
London, England, Electrical Engineer). Improvements in
rotary electric machines.

Claims.—(1.) For the rotating portion of electric machines,
an end or supporting plate having a number of chambers
round its circumference provided both at their inner and
outer ends with apertures, those at the inner ends of said
chambers being so located that they do not communicate
with the channels through which air is supplied for cooling
the armature core, so that a draught of air will be provided
for cooling the end windings of the machine without lessening
the quantity of air circulating in the armature core. (2.) An
end or supporting plate for the rotating portion of an electrical
machine, constructed and operating substantially as described
with reference to the drawings.
(Specification, 3s.; drawing, 1s.)

No. 18072.—22nd June, 1904.—WILLIAM EDWARD BARKER,
Farmer; and OWEN HERBERT BARKER, Gentleman, both of
Peel Forest, Rangitata, Canterbury, New Zealand. Im-
provements relating to hydraulic rams.

Claim.—An improvement in hydraulic rams, consisting of
the combination with an air-vessel of an air-valve connected
thereto and communicating with the interior thereof below
the normal level of water therein.
(Specification, 1s. 9d.; drawing, 1s.)

No. 18078.—23rd June, 1904.—HENRY ERNEST PARRY,
Civil Engineer; ROBERT WILLIAM THOMSON, Electrical En-
gineer; and WILLIAM JAMES FARLEY, Merchant, all of Wel-
lngton Street, Perth, Western Australia. Improved reversible
rotary engine.

Extract from Specification.—This invention of an im-
proved reversible rotary engine consists in the employ-
ment of a rotary and circular piston working within an