1492
THE NEW ZEALAND GAZETTE.
[No. 57

retort having a mass of refractory material therein, means for introducing oil and air thereto, the whole constituting a combustion and heating chamber, the said retort having an air-admission opening, beyond the refractory material, at or adjacent to its discharge end, a valve or cover controlling the passage through said opening, means for adjusting the position of said valve, and means operating during the passage of the gas through the retort for drawing in air through said opening. (4.) In an apparatus for making gas, a retort having a mass of refractory material therein, means for introducing oil and air thereto, the whole constituting a combustion and heating chamber, the said retort having an air-admission opening, beyond the refractory material, at or near its discharge end, a gas-delivery pipe or conduit leading from said retort, and means operating during the passage of the gas through the retort for drawing air into said retort through said opening to mix with the gas, for positively withdrawing the mixed air and gas from said retort, and for forcing the same into and through said delivery-pipe. (5.) In an apparatus for making gas, a retort having a mass of refractory material therein, means for introducing oil and air thereto, the whole constituting a combustion and heating chamber, the said retort having an air-admission opening, beyond the refractory material, at or near its discharge end, a gas-delivery pipe or conduit leading from said retort, and a fan interposed between said retort and said delivery-pipe and operating during the passage of gas through the retort for drawing air into said retort through said opening to mix with the gas, and for withdrawing the mixed air and gas from said retort by suction, and for forcing the same into and through said delivery-pipe. (6.) In an apparatus for making gas, a retort having a mass of refractory material therein, means for introducing oil and air thereto, the whole constituting a combustion and heating chamber; means operating during the passage of the gas through the retort for admitting air to the retort at its discharge end, a gas-delivery pipe or conduit leading therefrom, a rotary fan interposed between said retort and said delivery-pipe for withdrawing the gas from said retort by suction and forcing it into and through said pipe, and means under the control of the operator for controlling the speed of said fan from a source of constant power.
(Specification, 11s.; drawings, 3s.)

No. 19383.—19th April, 1905.—THOMAS GRUNDY, of Waiwera, Auckland, New Zealand, Engineer. An improved propeller-blade.

Claims.—(1.) The improved propeller-blade specified, having its cutting edge curved inwardly in the semi-crescent shape shown on drawing, its under or throwing-off edge curved outwardly in the semi-crescent shape shown on drawing, end of under or throwing-off edge turned over with an inclination inwards in the direction of the concavity as shown on drawing, and shaped as shown on drawing, for the purpose set forth, substantially as described and illustrated. (2.) The improved propeller-blade specified, having its cutting edge curved inwardly in the semi-crescent shape shown on drawing, its under or throwing-off edge curved outwardly in the semi-crescent shape shown on drawing, end of under or throwing-off edge turned over with an inclination inwards in the direction of the concavity as shown on drawing, and shaped as shown on drawing, in combination with the propeller and boss thereof, fitted to a vessel for propelling the same, for the purpose set forth, substantially as described and illustrated.
(Specification, 2s. 6d.; drawing, 1s.)

No. 19394.—26th April, 1905.—JOSEPH BOWRING, of 24, Bellott Street, Cheetham Hill, Manchester, England, Engineer. Improvements in obstruction-removers.

Claims.—An automatic obstruction-remover for tram-cars, consisting of a pivoted tray and swing-gate, a lever fast on the tray-axis and a lever fast on the gate-axis, a rod connecting such levers, a spring acting on the tray in such manner as to tend to lower its front edge on to the roadway, a further lever fast on the gate-axis, and a resetting-rod, with latching shoulder or a projection on its edge, connected to such further lever and passing through the car-floor, a loosely mounted cam on the gate-axis, a lever pivotally suspended from the car and lying against the cam at one end and against the resetting-rod at the other end, so that on the gate swinging rearwardly the cam passes against the suspended lever and the lever against the resetting-rod, substantially as and for the purposes set forth, and illustrated on the drawing. (2.) In latching and unlatching devices for life-guards, the arrangement of rods, levers, cam, gate-axis, and gate as set forth, and shown in Fig. 4 of the drawing.
(Specification, 3s. 6d.; drawing, 1s.)

No. 19416.—2nd May, 1905.—RALPH DUNNE, of Dunedin New Zealand, Picture-framer. Non-refillable bottle.

Extract from Specification.—When the bottle is filled the stopper 1 is thrust into the neck until it rests on and is supported by the flange 15, and an ordinary cork 16 is inserted in the neck above the stopper. The stopper cannot be withdrawn by any instrument inserted down the neck, on account of the hardness of the material of which the stopper is composed. The construction of the openings and chamber, and their relative positions in the stopper, and the position of the valve, prevents the insertion of a wire to destroy or remove the valve. This arrangement permits of the contents of the bottle being poured out, but prevents any fluid from being passed into the bottle.
[NOTE.—The above extract from the specification is inserted in place of the claim.]
(Specification, 3s. 6d.; drawing, 1s.)

No. 19417.—2nd May, 1905.—PAUL BOCK, of the firm of Paul Bock and Co., of Customs Street West, Auckland, New Zealand, Merchant. Improved means for attaching packets to show-cards.

Claims.—(1.) For the purpose indicated, in combination, a show-card adapted to carry a packet upon its face, slots cut through the card at each end of the packet, and tabs passed through said slot, secured to the back and adapted to be secured to the ends of the packet, substantially as specified. (2.) The means for securing the packet to a show-card substantially as described, and illustrated in the drawing.
(Specification, 1s. 6d.; drawing, 1s.)

No. 19422.—4th May, 1905.—ALFRED SPAULDING PATTERSON, of Nos. 570-576, Bourke Street, Melbourne, Victoria, Australia, General Manager for the Massey-Harris Company, Limited (nominee of Massey-Harris Company, Limited, a company duly incorporated under the Joint-stock Companies Act of the Dominion of Canada, of 915, King Street West, Toronto, Ontario, Canada, Manufacturers; assignees of Wilbur W. Marsh and Charles H. Hackett, both of Waterloo, Iowa, United States of America). Improvements in centrifugal liquid-separators.

Extracts from Specification.—In Figs. 1, 2, and 3 is shown a separating-disc of the ordinary type (that of a hollow truncated cone) at A, while on the upper surface thereof is formed a number of raised ridges B, B, each in the form of a helix, with channels between of the desired width, through which may course the liquid in process of separation. . . . Another improvement is the method of truncating the discs, as shown at C, so as to provide the upper edges thereof with a scalloped outline. The ascending lighter constituent of the liquid is thus allowed freer passage to the exit. . . . With this end in view, in a liner composed of separating-discs A supported on uprights G attached to an upper plate L and a lower plate M there is introduced a depending helical corrugated plate H attached to an upper plate K. The plate K is detachable from the plate L, and also bears an exit-tube J for the egress of the lighter constituent of the liquid. The corrugated plate H has its corrugations arranged in a series of parallel troughs, with a single perforation I at the outer angle of the lower end of each trough. Each one of the perforations I is placed opposite to and communicating with one only of the spaces between adjacent pairs of the separating-discs.
[NOTE.—The above extracts from the specification are inserted in place of the claims.]
(Specification, 7s.; drawings, 3s.)

No. 19423.—21st May, 1904.—PIERCE HENRY WATTS, of Long Street, Dursley, Gloucester, England, Dairy Engineer, Improvements in cream-separators.

[NOTE.—This is an application under section 106 of the Act, the date given being the official date of the application in Great Britain.

Claims.—(1.) The improvements in centrifugal liquid-separators consisting of a bowl or drum the internal laminations or cones of which are so corrugated with ribs and valleys commencing at or near the base of the cones, and increasing in depth as they ascend to the upper part of the cones, when the ribs and valleys are very pronounced, so as to form two different inclines, with suitable filling and exit provisions, substantially as set forth, and shown upon the drawings. (2.) In improvements in liquid-separators, making the cone-plates for the separation of cream and the like with corrugations or ribs and valleys which com-