Jan. 9.] THE NEW ZEALAND GAZETTE. 139

talking-machine attachment having an electro-magnet, and
means for energising it by making a contact at a distance
from the machine, the combination therewith of a pivoted
armature lever, an intermediate lever adapted to move and
pass the armature lever and have its return stopped by the
latter; and a connection from the intermediate lever to a
motor-controlling hand-lever or the like on the talking-
machine. (4.) A talking-machine attachment base plate, com-
prising integrally in combination the described parts 7, 18,
17, 11, 16, 22, 14, and 12, for the purposes set forth. (5.) A
talking-machine attachment comprising any suitable base
plate, electro-magnet, armature lever, and means for produc-
ing from a distance an electrical circuit to operate the said
lever, in combination with a pivoted lever 19, 20, spring 6,
hand-lever 4, and a spring or member having surfaces as
35, 36, adapted to operate as described. (6.) As a whole, a
talking-machine and an attachment in combination, having
all the parts illustrated in Figs. 1 and 4.

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

No. 23608.—17th October, 1907.—CHRISTIAN NEUMANN,
of 1430 Nebraska Avenue, St. Louis, Missouri, United States
of America, Scientist. Improvements in air-compressors.

Extract from Specification.—The object of my invention is
to construct a device whereby air is compressed and delivered
at a continuous pressure by a plurality of pistons operating
alternately by the movement of a revolving cam. A further
object of my invention is to construct a device having a
plurality of pistons arranged to be operated by a revolving
cam, each being continuously operated to produce a steady
flow of compressed air.

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

(Specification, 9s. 6d. ; drawing, 4s.)

No. 23610.—15th October, 1907.—CHARLES UDDSTROM,
of Greymouth, New Zealand, Cabinetmaker. Improved
chain-and-sprocket gearing.

Extract from Specification.—The object of my invention
is to transmit power round curves by chain-and-sprocket
gearing without the risk of the chain slipping off the wheels
when the latter become out of line. This object is effected
by constructing the sprocket-wheel with guard-teeth arranged
on each side thereof, and the chain is also of special construc-
tion, whereby the pin connecting the links is not directly
exposed to wear, and even engagement with the sprocket-
wheel is obtained.

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

(Specification, 2s. 6d. ; drawing, 1s.)

No. 23616.—17th October, 1907.—MATILDA WANNEN-
MACHER, of 50 Regent Street, Fitzroy, Melbourne, Victoria,
Australia. An instrument for the rolling or curling of butter
for table use.

Claim.—An instrument for the curling of butter and such-
like, consisting of a steel or similar blade portion with a
handle, the said blade portion being curved at its top end,
such blade portion having serrations to form a serrated
or tooth-like edge, substantially as described, and illustrated
in drawings.

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

No. 23650.—25th October, 1907.—JOHN ARTHUR BROWN,
of Dunedin, New Zealand, Engineering Manager, &c. Im-
provement in tap-handles.

Claims.—(1.) In taps, a horned or spoke-like handle for
working same, substantially as shown on the drawing, and
as described and explained. (2.) In taps, specially screw-
down, and in combination with them, the handle with horns
or spokes in one with a small boss, all substantially as shown
on the drawing, and as described and explained.

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

B

No. 23661.—30th October, 1907.—ETTORE BELLINI, of
4 Rue du 29 Juillet, Paris, France, Civil Engineer, and
ALESSANDRO TOSI, of 4 Rue du 29 Juillet, Paris, France,
Civil Engineer. System of directed wireless telegraphy.

Extract from Specification.—This invention relates to a
system of directed wireless telegraphy intended for radiating
and receiving waves mainly in a given direction. This
object is realised by using for the aerial of each transmitting
and receiving station “closed oscillation circuits,” which are,
according to the inventor’s observations, capable of radiating
or receiving waves whose main direction lies in the plane
of such circuits. As it is possible to control the direction
of the plane of the circuit, the direction of the waves may
be controlled accordingly. Closed oscillation circuits are,
as is well known, those in which the distance between the
armatures of the condenser is sufficiently small to cause
such circuits to radiate only waves that are very little damped.
Such circuits may be of any geometrical shape, regular or
irregular, and their dimensions are independent of the length
of the wave used.

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

(Specification, 7s. 9d. ; drawing, 1s.)

No. 23662.—30th October, 1907.—BRYN OLIVER ROBERTS,
of Calcutta, British India, Gentleman (assignee of Edward
Lennon Cantwell, of Calcutta, India, Civil Engineer and
Patent Agent). Improvements in sheet-metal roofing.

Extract from Specification.—This invention relates to im-
provements in sheet-metal roofing, whether corrugated or
flat, and are intended to remedy the defect resultant from
the system at present in use, wherein the sheets are merely
overlapped at ends and sides, and are holed for “rivets”
and for “wind-tie” fastening-bolts, which results in leakage,
corrosion, and deterioration of the sheets, the principal
defect being that under the present system no roof is com-
pletely watertight. The principal improvements are: (1.) I
devisé a method of hooking the ends of corrugated sheets
so that they shall engage with each other and form a water-
tight joint. (2.) In hooking the ends and sides of every
description of sheet I place a thin wire or rod, or its equivalent,
in the bend to prevent the hooked part being flattened down
and fractured. (3.) I devise and provide suitable clip fast-
eners for securing such end-hooked sheets to every description
of roof-frame. (4.) I devise and provide slit tubular cone
covers for the bent-up side joints of roofing-sheets. (5.) I
devisé and provide suitable “wind-ties,” the application of
which does not necessitate the making of holes in the sheets.
(6.) I devise and provide a method for covering thatched
roofs with sheet metal which will enable the farmer or owner
to lay the sheets himself without the aid of skilled labour.

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

(Specification, 14s. ; drawing, 1s.)

No. 23681.—2nd November, 1907.—MARCONI’S WIRELESS
TELEGRAPH COMPANY, LIMITED, of Watergate House, York
Buildings, Adelphi, Middlesex, England (the assignee of
Guglielmo Marconi, LL.D., D.Sc., of Watergate House,
York Buildings, Adelphi, Middlesex, England). Improve-
ments in transmitters for wireless telegraphy.

Extract from Specification.—According to this invention,
instead of the usual spark or arc in the oscillating circuit
of a wireless telegraph transmitter, the discharge is caused
to take place across a small gap between metal surfaces
in relative motion at a very high speed. One of the surfaces
may conveniently be a disc rotating so that its peripheral
speed is 100 metres per second, or more, while the other
surface may be stationary, or may likewise be a rotating
disc, in which case the speed of each disc need not be so great,
though the relative speed should preferably reach the value
given. The disc may be entirely insulated and rotate between
a pair of stationary or rotating balls or discs which are con-
nected in an oscillatory circuit containing a condenser and
an inductance, the condenser being connected to a source
of electro-motive force, &c.

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

(Specification, 5s. ; drawing, 1s.)