APRIL 16.]

THE NEW ZEALAND GAZETTE.

direction, but not in the reverse direction, and a retaining-
device is preferably employed to hold the lever thus operated
in whichever position it may be set.

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

(Specification, £1 1s.; drawing, 3s.)

No. 24030.-19th February, 1908.-HUGH CAMPBELL, of
Eagle Tavern Hotel, City Road, South Melbourne, Victoria,
Australia, Hotel-proprietor. An improved extension ladder.

Extract from Specification.--The mode of operating my
extension ladder is as follows: To shorten the ladder when
it is in its extended position, as shown in Fig. 1, the user
grips that part of the cord x between the roller z and the
eye-bolt y, drawing it downwardly, thereby causing the top
part a of the ladder to move upwards and the upper end of
the said dogs j to contact with the rung or step m immediately
above that to which they were locked. When the dogs
contact with the said rung m, they and the lever r are turned
and assume the positions shown in broken lines, Figs. 2
and 4 of the drawings. The dogs j are retained in this posi-
tion by keeping a constant downward pull on the outer
end of the said lever r, and the top part a may then be slidably
moved over the lower part b until the ladder is of the length
required, when the dogs j are released and allowed to engage
with the next rung m on the lower part b of the ladder, thus
locking the two parts a and b firmly and securely together.
To lengthen the ladder, that part of the cord x between
the roller z and the eye-bolt y is pulled downwards, causing
the top part a of the ladder to slide upwards over the lower
part b until it makes the required extension, when the dogs j
on the said upper part a are permitted to engage with a rung
or step m on the lower part b and lock them together.

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

(Specification, 6s.; drawing, 1s.)

No. 24046.-24th February, 1908.-MAJNUS JANZON and
OTTO ANDERSON, both of Wellington, New Zealand, Painters.
An improved process for the manufacture of imitation marble.

Claims.-(1.) A process for the manufacture of imitation
marble, the same consisting in placing a suitable cement
while in a plastic state within a mould or form and above
a network fabric upon which the required colouring materials
have been laid, and then lifting such fabric up through the
cement so as to carry the colours through with it into the
full depth of the cement, and to leave them there while the
fabric is lifted clear, substantially as specified. (2.) In the
process for the manufacture of imitation marble described
in claim 1, the employment of a cement consisting of a com-
position of Keene's cement with a solution of sugar of lead,
alum, and water, substantially as specified. (3.) In the
process for the manufacture of imitation marble described
in claim 1, placing a layer of serim or like material upon the
back of the coloured cement and pouring thereon a further
layer of the cement, substantially as specified. (4.) In the
process for the manufacture of imitation marble described
in claim 1, the manner whereby a design of different nature
may be formed in the face of the slab, consisting in the use
of a representation of such design made in stiff paper or the
like laid upon the bottom of the form or mould prior to the
other materials being placed therein, and afterwards with-
drawn therefrom, substantially as specified.

(Specification, 3s. 6d.)

No. 24053.-26th February, 1908.-WILLIAM COCHRANE,
of 26 Clarges Street, Piccadilly, London W., England, Me-
chanical Engineer. Improvements in propellers for ships
and boats and flying-machines.

Claims.-(1.) Propelling driving mechanism wherein the
rotary movement of a driving-shaft is transformed by means
of an oblique disc upon such shaft into an oscillating move-
ment and transmitted to a propeller-shaft, for the purpose
described. (2.) In combination with propeller-driving mecha-
nism as claimed in claim 1, means for altering the angle of the
oblique disc for the purpose of varying the amplitude of the
oscillations imparted to the propeller-shaft. (3.) In propeller-
driving mechanism as herein claimed, the combination of a
driving-shaft, a pivotally mounted disc thereon, a sleeve upon
the driving-shaft and connected to the disc, and a hand-lever
for sliding the sleeve upon the shaft for the purpose of vary-
ing the relative angle between the disc and shaft. (4.) In
propeller-driving mechanism, a disc upon the driving-shaft
grooved on its periphery, a ring and ball bearing in said
groove, and a strap engaging said ring and secured to the
propeller-shaft. (5.) In combination with propeller-driving
mechanism as claimed in claim 1, an oscillating propeller
having a beaded vane and correspondingly socketed frame
with a flange for the purpose described. (6.) The improved
means for driving oscillating propellers as described and
shown in Figs. 1 to 5. (7.) The improved motor-boat as
described and as shown in Figs. 6 and 7. (8.) The improved
means for driving oscillating propellers and mounted within
an enclosing casing, as described and as shown in Figs. 8, 9,
11, 12, and 13.

(Specification, 4s. 6d.; drawing, 2s.)

No. 24054.-26th February, 1908.-CHARLES WESLEY
NANCE, of No. 348 Oxford Street, Paddington, Sydney, New
South Wales, Australia, Provision-merchant. An appliance
to be rendered operative by an impellent liquid for the extrac-
tion of air, vapour, gases, and such like.

Claims.-(1.) In an appliance to be rendered operative
by an impellent liquid, an induction-chamber as A with its
inlet-port Al, having a liquid tube as D with its funnel-
shaped mouth as Dl, a valve-seating as C with its ports as
C4 adapted to be retained in its position by the lugs C2 and
a clamping-nut as C3, chases as C5 situated on the working-
face of the said seating, a flexible valve as C1, an extending-
mixing-chamber as B, screwed internally to receive a movable
plug as H, and externally to receive a casing as O to enclose
the adjustable plug, the opposite end being externally screwed
to receive a cushioning and compression chamber as G, and
provided with a cup-leather as S, substantially as described
and illustrated and for the purposes set forth. (2.) In an
appliance to be rendered operative by an impellent liquid,
the combination, with an induction-chamber as A, of a sole-
plate as E, substantially as described and illustrated and
for the purposes set forth. (3.) In an appliance to be rendered
operative by an impellent liquid, a cushioning and compression
chamber as G, having an inverted cell as G1, an air-chamber
as T, and an inlet-pipe as V, the whole adapted to be attached
to an induction-chamber as A, as described and shown and
for the purposes set forth. (4.) In an appliance to be rendered
operative by an impellent liquid, a removable nose-piece as J,
a friction-ferrule as K with its serrated orifice as Kl, an
adjustable washer as L, a bridled collar as M with its con-
ecting-bands as Ml internally screwed to receive the said
washer L, and an exit-pipe N externally tapered as at Nl
to fit a conical tube as I of an adjustable plug as H, as
described and shown and for the purposes set forth. (5.) In
an appliance to be rendered operative by an impellent liquid,
a removable plug as H and its central cone as I, the inner
and outer concave ends Hl and H2 adapted to form parts of
chambers as B and P, and screwed externally to fit into the
said chamber B, as described and shown and for the purposes
set forth. (6.) In an appliance to be rendered operative by an
impellent liquid, an outer casing as O forming an ebullition-
chamber as P adapted to enclose a movable plug as H, an
outlet-pipe as Pl with its reaction cavity as P2, a contracted
tail-piece as Q, slits in said tail-piece as Ql, and a travelling-
nut as R for expanding and contracting the said tail-piece,
as described and shown and for the purposes set forth.
(7.) In an outlet-pipe used as an attachment to an appliance
operated by an impellent liquid, an adjustable tail-piece as
Q, the silts Ql formed therein, and a travelling-nut as R,
as described and shown and for the purposes set forth.
(8.) In an appliance to be rendered operative by an impellent
liquid, the combination, with an air-induction chamber, of
a cushioning and compression chamber as G, whose inverted
cell G1 encloses a cup-leather as S, an air-chamber as T, and
inlet-pipe as V, a funnel-shaped mouth as D1, a liquid-tube
as D with its valve-seating as C and flexible valve as Cl
clamped thereon with a nut as C3, a nose-piece as J, a friction-
ferrule as K held in position by a washer as L, bridled collars
as M, connecting-bands as Ml, an exit-tube as N, an adjustable
plug as H, a mixing-chamber as B, and an ebullition-chamber
as P with an outlet-pipe as Pl, as described and shown and
for the purposes set forth. (9.) In an appliance of the kind
described, the combination, with an outlet-pipe as Pl, of an
air-releasing chamber as F3, with its conical saucer as F4,
and the floating screens as W, as described and shown and
for the purposes set forth. (10.) In an appliance of the kind
described, a chamber such as F for holding the impellent
liquid, flanges as El to receive a sole-plate as E, removable
ice-boxes as Fl with tubes therein as F2, and a suction-pipe
as U, as described and shown and for the purposes set forth.
(11.) In a fluid-container for holding impellent liquid to be