1270
THE NEW ZEALAND GAZETTE.
[No. 36

and pouring the metal through a common pouring-gate,
substantially as set forth. (2.) An improved manufacture of
sash-weights consisting in placing a series of patterns in a
box with a common gate pattern, withdrawing the sash-
weight patterns endwise through neck-holes in the end plates
of the box, plugging the outer end of each mould with chills
carrying the cores for forming the line-slots, withdrawing the
gate pattern, and pouring the metal through a common
pouring-gate after the open ends thereof have been plugged,
substantially as set forth. (3.) In the manufacture of sash-
weights, plugging the outer end of each mould with chills,
and fitting into holes therein the stems of line-slot chills, which
are withdrawn when the casting is completed, substantially
as set forth. (4.) In the manufacture of sash-weights, the
employment of the apparatus herein described, and illustrated
by the drawings, consisting essentially of a box having slotted
sides and adjustable end pieces formed with neck-holes
therein, end chills to plug the outer ends of the moulds,
line-slot chill-cores to fit said end chills, and a common trans-
verse gate pattern adapted to pass through holes in said sides.
(Specification, 3s. 3d. ; drawing, 1s.)

No. 22534.—13th March, 1907.—SAMUEL ERNEST BELL,
of Wangaratta, Victoria, Australia, Blacksmith. Improve-
ments in milk-buckets and similar vessels.

Claims.—(1.) A bucket having a pair of oppositely set
wide-mouthed bays as safety supporting-devices, substantially
as set forth. (2.) A bucket having more than one pair of
oppositely set wide-mouthed bays as safety supporting-de-
vices, substantially as set forth. (3.) In a bucket, wide-
mouthed bays for the purpose set forth, each having its in-
dentation deeper near its top than its bottom. (4.) A bucket
having a single wide-mouthed bay extending completely
(or for more than a semicircle) round it as a safety device,
substantially as set forth. (5.) A bucket (or blank therefor)
formed with large holes at opposite sides, the said holes being
filled by plates to form bays for supporting purposes, as
indicated.
(Specification, 3s. 9d. ; drawing, 1s.)

No. 22537.—14th March, 1907.—THE BRITISH WESTING-
HOUSE ELECTRIC AND MANUFACTURING COMPANY, LIMITED,
of Westinghouse Building, Norfolk Street, Westminster,
England, Manufacturers (assignees of Benjamin Garver
Lamme, of 230 Stratford Avenue, Pittsburg, Pennsylvania,
United States of America, Electrical Engineer). Connection
system for dynamo-electric machines.

Claims.—(1.) An alternating-current commutator dynamo-
electric machine of the series type, in which one of the windings
of the machine is prevented from being traversed by direct
current, for the purpose specified. (2.) A dynamo-electric
machine of the kind described, having one of its windings
connected in series with the primary winding of a transformer,
the secondary winding of which is connected to the other
winding of the machine, for the purpose specified. (3.) A
dynamo-electric machine of the kind described, having an
impedance device connected in shunt with one of its wind-
ings, for the purpose specified. (4.) For a dynamo-electric
machine of the kind described, an impedance device connected
in shunt with one of the windings of the machine, the core
of the said device being constructed so as to be magnetically
saturated when a predetermined amount of current traverses
that winding of the machine with which the device is connected,
for the purpose specified. (5.) For a dynamo-electric machine
of the kind described, an impedance device connected in shunt
with one of the windings of the machine, the value of the
current at which the core of the device becomes magnetically
saturated being arranged to be varied, for the purpose speci-
fied. (6.) An alternating-current dynamo-electric machine of
the kind described, having its field-magnet winding arranged
to be separately excited when the machine is operated as an
alternating-current generator, for the purpose specified.
(7.) An alternating-current commutator dynamo-electric
machine of the series type, in which the flux produced by the
field-magnet windings is caused to approximately coincide
in phase with the electromotive force of the circuit to which
the machine is connected when operating as a generator,
for the purpose specified. (8.) An alternating-current com-
mutator dynamo-electric machine of the series type which
may be operated either as a motor or a generator, provided
with means by which the amount of current traversing the
field magnet winding may be caused to be different from that
traversing the armature winding when the machine is operated
as a generator, the field magnetism being caused to agree
approximately in phase with the electromotive force of the
circuit to which the machine is connected, for the purpose
specified. (9.) An alternating-current dynamo-electric gene-
rator of the kind described, having a separately energised

field-magnet winding and a high ohmic resistance connected
in series therewith, for the purpose specified. (10.) The various
arrangements for operating and controlling dynamo-electric
machines of the commutator type, substantially as described
with reference to any of the figures of the drawings.
(Specification, 13s. 9d. ; drawing, 2s.)

No. 22538.—14th March, 1907.—THE BRITISH WESTING-
HOUSE ELECTRIC AND MANUFACTURING COMPANY, LIMITED,
of Westinghouse Building, Norfolk Street, Westminster,
England, Manufacturers (assignees of Benjamin Garver
Lamme, of 230 Stratford Avenue, Pittsburg, Pennsylvania,
United States of America, Electrical Engineer). Connection
system for alternating-current commutator-type motors.

Claim.—An alternating-current commutator dynamo-
electric machine havies series-connected armature and field-
magnet windings and provided with an impedance device con-
nected in shunt with the field-magnet winding, the core of the
said device being so dimensioned as to become magnetically
saturated more quickly than the magnetic circuit of the
field-magnet winding, for the purpose specified.
(Specification, 5s. ; drawing, 1s.)

No. 22539.—14th March, 1907.—THE BRITISH WESTING-
HOUSE ELECTRIC AND MANUFACTURING COMPANY, LIMITED,
of Westinghouse Building, Norfolk Street, Westminster,
England, Manufacturers (assignees of Benjamin Garver
Lamme, of 230 Stratford Avenue, Pittsburg, Pennsylvania,
United States of America, Electrical Engineer). Connection
system for dynamo-electric machines.

Claims.—(1.) A control system for electric motors of the
kind described, in which, when it is desired to operate the
motors as generators, their field-magnet windings are ener-
gized from an auxiliary generator of the commutator type,
the field-magnet winding of which is connected to the supply-
circuit, for the purpose specified. (2.) A control system for
a plurality of electric motors of the kind described, in which,
when it is desired to operate the motors as generators, one
or more of the motors is utilised as an auxiliary generator or
generators for exciting the field-magnet windings of the
remaining motor or motors, for the purpose specified.
(3.) Control systems for operating alternating-current commu-
tator dynamo-electric machines, arranged substantially as
described and shown with reference to any of the figures of
the drawings.
(Specification, 10s. ; drawing, 3s.)

No. 22540.—14th March, 1907.—THE BRITISH WESTING-
HOUSE ELECTRIC AND MANUFACTURING COMPANY, LIMITED,
of Westinghouse Building, Norfolk Street, Westminster,
England, Manufacturers (assignees of Benjamin Garver
Lamme, of 230 Stratford Avenue, Pittsburg, Pennsylvania,
United States of America, Electrical Engineer). Connection
system for dynamo-electric machines.

Claims.—(1.) A direct-current generator of the kind
described, having its field-magnet winding connected in
shunt with a secondary battery, the voltage of which is equal
to the drop of potential in the field-magnet winding for a
normal load on the generator, for the purpose specified.
(2.) A control system for a direct-current electric motor used
as a braking generator, in which a battery is arranged to be
connected in shunt to the field-magnet winding before the
motor is connected in the braking circuit, substantially as
described.
(Specification, 3s. 3d. ; drawing, 1s.)

No. 22551.—13th March, 1907.—IVAR PETER BAGGER
KNUDSEN, of Svanemollevej 56, Copenhagen, Denmark,
Director. Improvements in centrifugal machines.

Claims.—(1.) A supported centrifugal drum in which the
pivot of the drum, which is not connected fixedly with the
driving-shaft, is supported by a bearing capable of following
the oscillations of the drum, characterized (a) by the centre
of this bearing being situated in or near the horizontal plane
passing through the centre of gravity of the drum, and (b) by
a carrier which is loosely connected to the drum as well as to
the driving-shaft, said carrier carrying the drum with it and
supporting the drum some distance above the centre of
gravity of the latter, and being capable of oscillating round
its point of connection (which is situated considerably below
said centre of gravity) to the driving-shaft; this arrange-
ment having for effect that the drum is capable of rotating