Oct. 1.] THE NEW ZEALAND GAZETTE. 2561

No. 24744.—28th July, 1908.—THE NEW ZEALAND ACETYLENE GAS LIGHTING COMPANY, LIMITED, of Dunedin, New Zealand (assignees of Herbert Peachey Desmoulins, of Dunedin aforesaid, Secretary, New Zealand Acetylene Gas Lighting Company, Limited). Improved acetylene-gas generator, purifier, and holder.

Claims.—(1.) In an apparatus of the kind set forth, comprising a generator, brake-levers having flexible connections controlling carbide-displacers, a tapered carbide feed-cover, an air-inlet, a displacement overflow-tube, a purifier, a rubber seat supporting the purifying mixture tray, and a gas-holder, substantially as and for the purpose described. (2.) The parts of the apparatus for generating, purifying, and storing gas from carbide, constructed, combined and operating substantially as described, with reference to the drawings, and for the purpose set forth.

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

No. 24777.—10th August, 1908.—FREDERICK BASHAM, of Hawera, New Zealand, Civil Engineer. An improved roadway.*

Claims.—(1.) In roadways, forming the wheel-tracks of blocks of concrete embedded end for end in the surface of the road, each of such blocks being formed with a groove longitudinally along its upper and lower surfaces, and with dovetail or like projections upon its ends adapted to fit into or overlap corresponding formations upon the blocks next in order to it, so as to key the whole together, substantially as specified. (2.) In roadways, forming the wheel-tracks of blocks of concrete made in the form herein described, and embedded end to end along the road, substantially for the purposes specified.

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

No. 24780.—8th August, 1908.—THE WILSONS PORTLAND CEMENT COMPANY, LIMITED, of Auckland, New Zealand, Cement-manufacturers (nominees of Spencer B. Newberry, of Sandusky, Ohio, United States of America). Waterproof portland cement and process of making same.

Claims.—(1.) The process of rendering cement waterproof, which consists in mixing therewith a small percentage of the insoluble lime-salt of a fatty acid, substantially free from glycerine or other soluble substance. (2.) The process of rendering cement waterproof, which consists in mixing therewith a small percentage of insoluble stearate of lime, substantially free from glycerine or other soluble substance. (3.) A composition of matter resulting from the described process, which consists of cement mixed with a small percentage of the insoluble lime-salt of a fatty acid, substantially free from glycerine or other soluble substance. (4.) A composition of matter which consists of cement mixed with a small percentage of insoluble stearate of lime, substantially free from glycerine or other soluble substance.

(Specification, 3s.)

No. 24786.—12th August, 1908.—CLYDE JAY COLEMAN, of 316 Hudson Street, New York, United States of America, Engineer. Improvements in or relating to railway and like signalling systems.

Claims.—(1.) In a railway electrical signalling system, a track having a pair of conductively continuous rails, sources of signal-controlling current supplying the same at intervals, there being between each pair of adjacent sources a point in the track circuit (for example, at the bond C) of normally substantially zero difference of potential of the current of the said sources, electro-responsive devices in operative relation to the track circuits at points between each of said zero points and each source, and signals operatively related to said electro-responsive devices. (2.) In a railway electrical signalling system, two sources of signal-controlling current, a pair of conductively continuous rails supplied thereby at different points, and means for providing a limit to the lengths of intervening rails in the circuits of the respective sources comprising a cross bond (such, for example, as C) between the rails completing the circuits from both sources. (3.) In a railway electrical signalling system, two sources of signal-controlling current, a pair of conductively continuous rails supplied thereby at different points, a bond connecting for the purpose specified the rails at a point between said sources and completing the circuits from the respective sources, and electro-responsive devices, and in operative relation to a track-rail where adjacent to said bond, and the other in operative relation to a track-rail where adjacent to said bond, but on the opposite side thereof. (4.) In a railway electrical signalling system, a conductively continuous track, bonds of negligible impedance connecting the rails at intervals, sources of signal-controlling current connected to the rails intermediate said bonds, signal-controlling devices, and electro-responsive devices for governing the same connected and arranged to be actuated in one direction or the other, according to whether or not the current from the source is diverted from the rails between a source and one of said bonds. (5.) In a railway electrical signalling system, a block formed by the rails of the track and low impedance bonds connecting said rails, a source of current-supply (such, for example, as F) connected to the rails and having signal-controlling circuits each through one rail, a bond, and thence through the other rail, and electro-responsive signal-controlling devices energized responsively to the flow of current in said circuits. (6.) In a railway electrical signalling system, conductively continuous rails, an electro-responsive signal-controlling device and circuit, means for supplying a current to a normally closed rail-circuit that is independent of said electro-responsive device and circuit, and means for supplying current to the electro-responsive device dependent upon the electrical condition of a definite portion of the said rail-circuit. (7.) In a railway electrical signalling system, a signal, an electro-responsive device in operative relation therewith, a transformer having a track-rail and a coil (such, for example, as G¹) in inductive relation to each other, and a source of inducing current (such, for example, as F), one of the elements of said transformer being supplied by said source and the other supplying said electro-responsive device. (8.) In a railway electrical signalling system, the track-rails, a cross bond of negligible impedance connecting them, a source of electric supply connected to the track-rails at a substantial distance from the bond, a coil inductively related to the rails adjacent to the bond, a relay controlled by the current in said coil, and a signalling circuit controlled by said relay. (9.) In a railway electrical signalling system, a signal-controlling circuit, a coil supplied with current thereby, a switch, means for determining the actuation of said switch in accordance with the current in said coil, independent means for actuating said switch and a signal circuit controlled by the movement of said switch. (10.) In a railway electrical signalling system, a signal, a signal-controlling circuit, a coil in operative relation to the same, a movable magnetizable switch member in inductive relation to said coil, a magnetizable member having a surface adjacent to said switch member, and means for imparting a continuous movement thereto.

(Specification, £1 3s. ; drawing, 2s.)

No. 24797.—13th August, 1908.—CECIL SHIERLAW ELMSLY, Engineer, JOHN HAMILTON REID TAYLOR, Manufacturer, and PAUL BATES, Plumber. all of Temuka, New Zealand. An improved spouting-bracket.

Claims.—(1.) A spouting-bracket characterized by having an overhanging bearing-piece upon the extremity of its outer member, and a link articulated in such bearing, in combination with a pair of hooks, each adapted to fit over the spouting-bead, joined together by a cross-piece, adapted to fit beneath the bearing-piece on the bracket, substantially as and for the purposes specified. (2.) The improved spouting-bracket, substantially as described and explained, and as illustrated in the drawings.

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

No. 24818.—20th August, 1908.—JOHN FRANKLIN BRADY, of 45 Fulton Street, Chicago, County of Cook, Illinois, United States of America, Mechanical Engineer. Improvements in turbines.

Claims.—(1.) In a turbine comprising a vane member provided with a recess, a plurality of vanes and blocks, and means anchoring the parts in said recess, the arrangement of means independent of said member for connecting said vanes and blocks. (2.) A turbine wherein the blocks and vanes are apertured at points intermediate of their outer edges and wherein a rod or wire is inserted through said apertures. (3.) A turbine wherein the vanes are anchored at one end only, the free ends of the vanes projecting beyond the blocks, and wherein the vanes and blocks have oppositely disposed parallel engaging surfaces. (4.) A turbine wherein the top, bottom, and side edges or margins of the vanes are continuously straight and unbroken. (5.) A turbine wherein the vanes are anchored at one end only, the free ends of the