1150

ferrule-shaped attachment to said casing through which
said point reciprocates and which is rotatable therewith
and turned thereby, a rotatable neck-mould turned by said
attachment, and a finishing-mould aligned with said neck-
mould and within which the bottle is turned by said
neck-mould. (16.) In a glass-bottle-blowing machine, the
combination with a face-plate, a casing carried by said
face-plate, and an air-conduit communicating with said
casing, of a rotatable plunger arranged to slide in said
casing, a ferrule-shaped attachment rotatably mounted upon
said casing and fitted to said plunger to turn therewith, a
neck-mould enclosing said attachment and secured thereto,
a support for said neck-mould carried by said face-plate
and embracing the neck-mould, another mould arranged in
line with the plunger and neck-mould, and means for re-
ciprocating and rotating said plunger, substantially as
specified.

(Specification, £1 8s. ; drawings, 5s.)

No. 13604.--10th May, 1901.--EDWARD WATERS, Jun., a
member of the firm of Edward Waters and Son, of 131,
William Street, Melbourne, Victoria, Patent Agent (nominee
of Louis Engelhorn, of 44, Cedar Street, New York, United
States of America, Merchant, assignee of John Patten, of 19,
Liberty Street, New York aforesaid). Process and apparatus
for manufacture of ice.

Extract from Specification.--This invention relates to the
manufacture of ice, and it comprises a novel method or
process of forming ice, and novel apparatus by means of
which the ice is formed. It is well known that water
may be frozen by subjecting it to the influence of a high
vacuum, which produces rapid evaporation, depriving the
water of its heat, and converting it into ice. The
process and apparatus of the present invention relate to
this general method of congealing water. In vacuum freez-
ing-apparatus heretofore proposed, water to be frozen has
been poured or sprayed upon the bottom of the freezing-
chamber in such quantity that it would flow or distribute
itself over the bottom of the chamber before freezing. It
has been found that water so supplied to the freezing-cham-
ber does not form solid or compact ice, the resultant ice
containing bubbles or cavities sufficient to render it soft,
unsightly, and unmarketable. The improved method consti-
tuting part of the present invention consists in spraying the
water upon a surface exposed to a high vacuum in such re-
gulated quantity that it will freeze at the moment when and
the place where it strikes the said surface. It is preferable
that the surface upon which the water is sprayed be verti-
cal, or inclined to the horizontal, so that water cannot accu-
mulate and stand upon it in case the vacuum should be
temporarily impaired or the amount of water supplied in
excess of the normal and proper amount. Under normal
conditions--that is, with a high vacuum and a properly re-
gulated flow of water--the drops or particles of water will be
cooled approximately to the freezing-point before striking
the surface upon which the ice is formed, or the ice pre-
viously formed thereon, and they will freeze at the time and
place of impact. To produce this effect the spray of water
should travel some distance through the evacuated space
before striking. By this method compact, hard, merchant-
able ice may be formed on any surface, although it is pre-
ferable to use a surface upon which water in liquid form
cannot accumulate, which may be termed a "self-draining"
surface. It is preferred, in practice, to spray the water suc-
cessively upon different portions of the surface upon which
it is to be frozen. In other words, the spray of water should
be made to travel over the surface and play upon different
portions successively. In this way every portion of new ice
becomes dry and hard before additional water is sprayed
thereon, which insures the new water freezing immediately
and at the place where its strikes. Various kinds of movable
spraying-apparatus may be used, the particular movements
of the spraying-device being determined by the shape of the
surface upon which the ice is to be formed. In this appli-
cation a cylindrical freezing-chamber is illustrated and de-
scribed containing a removable polygonal wall upon which the
ice is formed, and the spraying-device is rotated continuously
and reciprocated along the freezing-chamber to distribute
the water evenly over said wall, as hereinafter described.
The essential features of the process are that the water is
delivered where it is to be frozen, that it is delivered in the
form of spray, or subdivided, so that it presents a large sur-
face to the action of the vacuum, and that the rate of de-
livery of the water is so regulated that all of it will freeze
immediately upon striking the previously formed ice or any
solid substance exposed to the vacuum. Other important
features consist in causing the spray to move over the ice-
surface, and to traverse the vacuum for a sufficient distance
to effect the cooling of the water before it strikes. The ap-
paratus forming part of this invention comprises one or more
chambers into which the water to be frozen is introduced,

one or more exhaust-pumps for maintaining a vacuum in
these freezing-chambers, one or more "absorbers" through
which the vapour from the freezing-chambers passes to the
exhaust-pump, one or more concentrators' for reconcentrat-
ing the absorbing-material which is used in the absorbers,
means for circulating the absorbing-fluid between the ab-
sorbers and the concentrators, a vacuum-gauge, and other
accessories.

[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, £2 15s. ; drawings, 15s.)

No. 13606.-7th May, 1901.-CHARLES FREDERICK ALLAN
CAMBRIDGE, of Styx, Canterbury, New Zealand, Farmer.
Improved apparatus for measuring milk.

Claims.--(1.) The improved apparatus for measuring the
quantity of skim-milk within a can consisting of the parts ar-
ranged, combined, and operating substantially as and for the
purposes described, and as illustrated in the drawing. (2.) In
apparatus for measuring skim-milk, a float designed to rest
upon the milk, and an upwardly extending measuring-staff
passing through a bridge-piece resting upon the mouth of the
can, substantially as specified and illustrated. (3.) In appa-
ratus for the purpose described, a float designed to rest upon
the surface of milk in a can, holes passing vertically through
said float, an upwardly extending measuring-staff fixed to
said float, and a bridge-piece extending across the mouth of
the can through which the said staff passes, substantially as
specified and illustrated.

(Specification, Is. 6d. ; drawings, Is.)

No. 13608.--13th May, 1901.--OSCAR ANDREWS, of Levin,
Wellington, New Zealand, Blacksmith. Improvements in
milk-cans.

Claim.--In milk-cans, a guide consisting of a circular
corrugation or impression in the can near the top, of the
nature and for the purpose as fully set forth and described.

(Specification, Is.; drawings, Is.)

No. 13609.--13th May, 1901.--JOHN MACPHERSON, of Wel-
lington, New Zealand, Consulting Engineer. Improvements
in the construction of screens for sorting mineral wash or
tailings.

Claim.--The improved screen for sorting mineral wash or
tailings constructed of externally flanged plates in such a
manner that the sections composing it may be connected
together from without, thereby rendering the inside surface
perfectly smooth to insure uniform wear throughout, as
described.

(Specification, Is. 6d. ; drawings, Is.)

F. WALDEGRAVE,
Registrar.

An asterisk (*) denotes the complete specification of an in-
vention for which a provisional specification has been already
lodged.

NOTE.--The cost of copying the specification and drawings
has been inserted after the notice of each application. An
order for a copy or copies should be accompanied by a post-
office order or postal notes for the cost of copying.

The date of acceptance of each application is given after
the number.

Provisional Specifications.

Patent Office,
Wellington, 15th May, 1901.

APPLICATIONS for Letters Patent, with provisional
specifications, have been accepted as under:-

No. 13565.--10th May, 1901.--GEORGE BARNEY, of Wa-
tahi Flat, New Zealand, Farmer. An improvement in
ploughs.

No. 13567.--29th April, 1901.--IGNATIUS SINGER, of Rich-
mond Street, Petone, Wellington, New Zealand, Analytical
Chemist. An improved apparatus for heating water for
domestic purposes.

No. 13569.--1st May, 1901.--JOSEPH MILTON BENNETT, of
Awahuri, New Zealand, Farmer. Filter for purifying drain-
ings from factories, &c.

No. 13571.--30th April, 1901.--ALFRED TYREE and CHARLES
WILLIAM ZIELE, both of Lichfield Street, Christchurch, New
Zealand, Merchants. Improved means for stiffening the
backs of boot-uppers.

No. 13573.--2nd May, 1901.--DONALD DONALD, of Master-
ton, New Zealand, Settler. Improvements in targets.