FEB. 22.] THE NEW ZEALAND GAZETTE. 637

No. 20590.-18th January, 1906.-ALBERT LINCOLN JOHN- son, of St. Louis, Missouri, United States of America, Civil Engineer. Improvement in corrugated bars.

Extract from Specification.-My invention relates to corrugated bars for reinforced concrete constructions, and has for its principal objects to produce a corrugated bar having a uniform cross-section; to produce a corrugated bar having projections or depressions arranged at such an angle to the axis of the bar that in any transverse plane the area of the section through the projections or depressions will be equal to the area of such section in any other transverse plane; to produce a corrugated bar having projections or depressions inclined to the axis of the bar, and so disposed relatively to each other as to neutralise the forces tending to move the bar laterally; to overcome the objectionable results arising from ribs, projections, or depressions inclined at an angle to the axis of the bar.

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

(Specification, 8s.; drawing, 1s.)

No. 20592.-18th January, 1906.-WILLIAM ERNEST HUGHES, of Queen's Chambers, Wellington, New Zealand, Registered Patent Agent (nominee of William Maple Bradshaw, of 400 Whitney Avenue, Wilkinsburg, Pennsylvania, United States of America, Electrical Engineer). Improvements in alternating-current electric motors.

Claims.-(1.) An alternating-current motor having shunt and series field coils with separate cores for said coils, one of said cores having a main polar projection and polar projections at right angles thereto separated from the main polar projection by air-gaps, and the other of said cores having polar projections which are opposite the gaps in the first core, substantially as described. (2.) An alternating-current motor with a core of the kind described, and having a closed circuit conductor adjustable longitudinally on the main polar projection, substantially as and for the purpose specified. (Specification, 4s. 6d.; drawing, 1s.)

No. 20594.-2nd February, 1905.-BELTON TATTNALL HAMILTON, of the Finchley Motor and Engineering Company, Limited, of Finchley, Middlesex, England, Engineer, and LEWIS STROUD, of 19 and 20 Holborn Viaduct, London, England, Solicitor. Improvements in and relating to locking devices.

[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.) In a controlling device of the kind described, the combination with the handle C and arm B D having slight relative movement of spring-controlled balls or rollers E, the whole being arranged and operated substantially as described. (2.) In a controlling device of the kind described, the combination with the arm B of the cam-shaped portion D, substantially as and for the purpose described. (3.) In a controlling device of the kind described, the combination with the arm B of the casing B'. (4.) In a controlling device of the kind described, the combination with the bar A of the movable member G, handle C, and locking device E F, substantially as described. (5.) The complete controlling device acting as described or illustrated in Figs. 1 to 3, or in Figs. 4 and 5, or in Fig. 6, or in Fig. 7 of the drawings. (Specification, 5s. 6d.; drawing, 1s.)

No. 20599.-17th January, 1906.-JOHN J. BRYERS, of Rawene, Hokianga, New Zealand, Proprietor of the Masonic Hotel. An improved automatic fire-escape.

Claims.-(1.) A balanced trap-door, cover, lid, window, grating, skylight, ventilator, or damper, as the case may be, counterbalanced by a ladder, shoot, hoist, or vehicle, as the circumstances may dictate, by means of a "conveyer" such as described in combination for the purposes described. (2.) A "conveyer" such as described in combination with a balanced hinged trap-door, cover, lid, window, grating, skylight, ventilator, or damper, as the case may be, counterbalanced by a hinged ladder, shoot, hoist, or vehicle, as may be, in combination with a "conveyer" such as described, for the purpose described. (Specification, 6s. 6d.; drawings, 2s.)

No. 20613.-18th January, 1906.-FRANCIS STEELE, of Port Chalmers, New Zealand, Fisherman. Improved crayfish trap.

Claim.-A crayfish-trap in which the upper portion is bent inwardly in a hook shape, leaving an opening, and in which the bait-support lies across the top of the trap, substantially as described. (Specification, 1s.; drawing, 1s.)

No. 20620.-23rd January, 1906.-HENRY JAMES MARKS, of Russell Street, Toowoomba, Queensland, Australia, Architect. An improved method of hanging windows, shutters, or doors.

Claims.-(1.) In an improved method of hanging windows, shutters, or doors an arm hinged to the jamb and pivoted centrally or thereabouts to the rail of the window-shutter or door, as described and illustrated by drawings. (2.) In an improved method of hanging windows, shutters, or doors an arm hinged to the jamb and pivoted centrally or thereabouts to the rail of the window, shutter, or door, to one end of which at top and bottom are secured pins adapted to slide in grooves in sill and head of opening, as described and illustrated by drawings. (Specification, 2s.; drawing, 1s.)

No. 20621.-23rd January, 1906.-HENRY JAMES MARKS, of Russell Street, Toowoomba, Queensland, Australia, Architect. Improved chimney-top and ventilator.

Claim.-In chimney-tops, ventilators, and the like having enlarged chambers with transverse drain-gutters under the upper opening, the use of drip edges f, and ribs c, as arranged in the forms, substantially as described and illustrated by drawings. (Specification, 2s.; drawing, 1s.)

No. 20622.-23rd January, 1906.-ALEXANDER TAYLOR, of Dunedin, New Zealand, Attendant. Improved flushing-cistern.

Claims.-(1.) In a flushing-cistern, an arm pivoted to the discharge-lever and carrying at its end a cup with a small opening in its bottom, the cup being adapted to descend into and be filled by the water in the cistern when the discharge-lever is actuated for discharge thereof, substantially as and for the purposes set forth. (2.) In a flushing-cistern, an air-pipe entering the discharge-pipe below the valve, substantially as and for the purpose set forth. (3.) Improved flushing-cistern, substantially as described and illustrated in the drawing. (Specification, 2s. 6d.; drawing, 1s.)

No. 20733.-13th February, 1906.-SOREN PEDER ANDERSEN, of Auckland, New Zealand, Dairy Expert, C.A., Royal Danish Agricultural College. An improved method of preserving milk, cream, butter, and suchlike.

Claims.-(1.) The method of preserving milk, cream, butter, and suchlike in its semi-natural state by mixing with the milk or cream one-sixteenth to one-twentieth percentage of bicarbonate of soda (NaHCO3), stirring it, and again mixing with it three-tenths to five-tenths of ten-volume strength of hydrogen-peroxide (H2O2), then heating the mixture to 110° Fahr. under occasional stirring, and keeping it at that temperature for fifteen to thirty minutes, subsequently cooling it down to 50° Fahr., all for the purpose set forth, substantially as described. (2.) The method of when milk or cream has been treated with the process as explained in claim 1 hereof, of adding and mixing with it while it should contain any microbes, germs, or spores, a three-tenths to five-tenths percentage of ten-volume strength of hydrogen-peroxide (H2O2), and then heating such mixture to 110° Fahr. for fifteen to thirty minutes under occasional stirring, and subsequently cooling it down to 50° Fahr., all for the purpose set forth, substantially as described. (3.) The method of adding or mixing with milk or cream a three-tenths to five-tenths percentage of ten-volume strength of hydrogen-peroxide (H2O2), and heating the mixture to 110° Fahr. for fifteen