Nov. 29.] THE NEW ZEALAND GAZETTE. 3091

oven or some other part of the range, and if necessary forming
a loop in such pipe whereby the water is reheated before being
returned to the circulating tank, substantially as and for the
purposes set forth and as illustrated. (2.) In hot-water sys-
tems, the employment of a sludge-cock at the lower part of the
same, and connected with the various pipes in such manner
that the whole of the system may be cleared thereby, sub-
stantially as specified, and as illustrated in the drawing.

(Specification, 3s. ; drawing, 1s.)

No. 21925.—17th October, 1906.—CHARLES HUDSON THORBY, of Stanway, Halcombe, New Zealand. A screw-
driving machine.

Claims.—(1.) A machine for use in driving screws, com-
prising a screw-threaded bolt screwing longitudinally through
a frame, a screw-driver extending longitudinally through
a bore formed in such bolt and projecting beyond each end
thereof, a spring surrounding the upper projecting end of
the screw-driver and in compression between the head of the
bolt and an enlargement of such screw-driver, and means
whereby the screw-driver may be depressed and released
from pressure and whereby the bolt may be rotated, sub-
stantially as and for the purposes specified. (2.) In a machine
for use in driving screws such as that referred to in claim 1,
a pivoted lever-arm extending diametrically across the top
end of the screw-driver and pivoted on one side thereof,
substantially as and for the purposes specified. (3.) The
screw-driving machine constituted and operating substantially
as described and explained, and as illustrated in the draw-
ing.

(Specification, 4s. 6d. ; drawing, 1s.)

No. 21935.—15th October, 1906.—WILLIAM TYREE, of
Nelson, New Zealand, Gas Engineer. A new or improved
automatic spray for painting, agricultural, or disinfecting and
other analogous purposes.*

Extracts from Specification.—My invention consists princi-
pally in the application of acetylene gas as a motive power in
an apparatus (also the subject of my invention) worked auto-
matically by the operation of such gas, for the spraying of
paint, and fluids or solutions for agricultural, disinfecting, and
other analogous purposes. My invention is carried out by the
construction of a metal cylinder having an aperture at the
top fitted with a gastight lid. . . . The receptacle is so
arranged that when the shaft is revolved it is turned upside
down, and the carbide of calcium is thrown into the solution
for spraying placed in the cylinder.

[NOTE.—The above extracts from the specification are inserted in place
of the claims.]

(Specification, 7s. 6d. ; drawing, 1s.)

No. 21950.—23rd October, 1906.—WILLIAM TYREE, of
Nelson, New Zealand, Gas Engineer. A new or improved
building-block for the construction of the walls of refrigerat-
ing-chambers or other like receptacles, and of incubators,
and of fireproof safes, and fireproof partitions or walls for
buildings, and the method of constructing such walls and
partitions therewith.

Claim.—The new or improved building-block, with parti-
tions therein so as to form cellular cavities, for the construc-
tion of the walls of refrigerating-chambers or other like re-
ceptacles, of incubators, and of fireproof safes, and fireproof
partitions or walls for buildings, and the method of con-
structing such walls and partitions therewith, all substantially
as described, and illustrated in the drawings.

(Specification, 12s. ; drawing, 1s )

No. 21954.—24th October, 1906.—EDWARD MURRAY TOM-
LINSON, of the Castle House, Petersfield, Hants, England,
Clerk in Holy Orders. Improved hand signalling-lantern for
the use of railway guards, shunters, and others.

Extract from Specification.—The construction of the im-
proved lantern is such that merely by sharply twisting the
hand which holds the lantern the frame carrying the different
coloured glasses will be caused to rotate, relatively to the
lantern body, through a definite angle, and may at each such
operation bring a different coloured glass into registration
with the bull’s-eye of the lantern.

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

(Specification, 11s. ; drawing, 3s.)

No. 21956.—24th October, 1906.—THE DE FOREST WIRE-
LESS TELEGRAPH SYNDICATE, LIMITED, of 6 Princes Street,
London, England (assignees of Lee De Forest, of 42 Broad-
way, New York, United States of America, Electrical Engi-
neer). Improvements in and relating to apparatus for use in
signalling by electro-magnetic waves.

Claims.—(1.) Apparatus in which predetermined direction-
indicating signals may be sent by electro-magnetic waves in
predetermined direction, for the purpose specified. (2.) Ap-
paratus as in claim 1 adapted to send signals of a predeter-
mined character to indicate to the receiving apparatus the
location of the apparatus transmitting the signals. (3.) In
apparatus of the kind referred to in claims 1 and 2 a rotat-
able signalling-wheel divided into sectors and provided with
electrical contacts, substantially as and for the purpose speci-
fied. (4.) Apparatus of the kind referred to in claim 1
provided with radiation-concentrating devices comprising a
rotatable parabolic reflector or an inclined rotatable antenna,
for the purpose specified. (5.) Apparatus as in claim 1
adapted for use on shipboard, and in which signals may be
received by said apparatus during intervals in which it is
not being used as a transmitter, for the purpose specified.
(6.) Apparatus as in claim 5 having a switch adapted to
render the responder of the signal-indicating mechanism in-
operative when signals are being transmitted, and to render
said responder operative when signals cease to be transmitted,
substantially as and for the purpose specified. (7.) A modi-
fied form of apparatus of the kind referred to in claim 1
adapted for use on locomotives and the like, in which the
antennæ are connected at rapidly recurring intervals to the
transmitting and receiving apparatus alternately, substantially
as and for the purpose specified. (8.) Apparatus having its
parts constructed, arranged, and adapted to operate sub-
stantially as described with reference to any of the examples
illustrated in the drawings, for the purpose specified.

(Specification, 12s. ; drawing, 2s.)

No. 21957.—24th October, 1906.—JOHN HENRY HICKMAN
and JOHN WHITELAW, 33C Lorne Street, Wellington, New
Zealand, Cabinetmaker and Carver respectively. Improved
showcase.

Extract from Specification.—In carrying out our invention we
cut segments from out of the edges of ordinary pieces of flat
window or plate or sheet glass of any size or shape or pattern,
as shown on drawing Fig. 4, and by bending the flat surfaces
of the glass E (Figs. 2 and 3) to the required sweep or shape,
so as to allow of the opposite internal edges FF of glass E
(Fig. 4) on drawing out of which the segment has been cut, to
be drawn closely together.

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

(Specification, 1s. 3d. ; drawing, 1s.)

No. 21958.—24th October, 1906.—JOHN HENRY HICKMAN
and JOHN WHITELAW, 33C Lorne Street, Wellington, New
Zealand, Cabinetmaker and Carver respectively. An im-
proved motor-car dust and wind shield.

Claim.—A dust and wind proof motor-car shield of semi-
circular shape in combination with double-hinged arms and
supports, and sliding and folding glazed frames, substantially
as described and shown in drawings.

(Specification, 1s. 3d. ; drawing, 1s.)

No. 21959.—24th October, 1906.—JOHN HENRY HICKMAN
and JOHN WHITELAW, 33C Lorne Street, Wellington, New
Zealand, Cabinetmaker and Carver respectively. An im-
proved window or showcase bar.

Claim.—A glass dividing or framing bar for use in com-
bination with and in the construction of showcases, window-
fronts, frames, or sashes and the like. The bar to consist of
a combination of glass and metal, or glass, metal, and wood,
or glass and wood, or entirely of glass, substantially as de-
scribed, and shown in drawings.

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