Jan. 23.] THE NEW ZEALAND GAZETTE. 345

locking-device compressing the lever in such manner as to force the cutter down upon the comb by means of a rocking pin or pillar, substantially as described, and shown in the drawings.

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

No. 23767.—27th November, 1907.—ROBERT DAVID LEWERS, of Sussex Street, Sydney, New South Wales, Australia, Bank-manager, and FREDERICK SAMUEL GREER, of Market Street, Sydney aforesaid, Engineer (assignees of Frank Gerson, of Heeley Street, Sydney aforesaid, Commercial Broker, and William Gustave English, of Hubert Street, Leichhardt, Sydney aforesaid, Engineer). An improved rabbit-trap.

Claims.—(1.) An improved rabbit-trap consisting of a longitudinal horizontal bar rotated alternately by the weight of a rabbit and that of a weighted arm provided for the purpose, a pair of entrance and a single exit gate secured thereto and operated thereby, the whole so constructed and arranged that while the entrance gates are open the exit is closed, and vice versa, all for the purpose set forth and substantially as described, and as illustrated in the drawings. (2.) In an improved rabbit-trap, a horizontal rotating bar carrying the entrance and exit gates, in combination with a pair of hinged floor-plates and the necessary connecting rods or cords, for the purpose set forth.

(Specification, 3s.; drawings, 2s.)

No. 23769.—27th November, 1907.—CHARLES HENRY JOSEPH GENET, of Christchurch, New Zealand, Engineer. Improved means for fastening bicycle-pumps to bicycle-frames.

Claims.—(1.) Means for the purpose indicated, comprising the combination with a spring-controlled pin adapted to engage longitudinally with the end of the pump, and to hold the pump between it and a fixed support, of a hasp hinged to the top end of the pin, and a fixed extension from the pin-supporting bracket over which the hasp is adapted to be passed when the pin is at its normal position, such extension being adapted to receive a padlock or the like, substantially as specified. (2.) The improved means for fastening bicycle-pumps to bicycle-frames, substantially as described and explained, and as illustrated in the drawings.

(Specification, 2s. 9d.; drawings, 1s.)

No. 23772.—26th November, 1907.—G. AND C. HOSKINS, LIMITED, a company duly registered and trading under the laws of the State of New South Wales, having its registered office at Wattle Street, Sydney, New South Wales, Australia, and carrying on business as Engineers and Boilermakers (assignees of George John Hoskins, M.Inst.M.E., of “St. Cloud,” Burwood Road, Burwood, near Sydney, New South Wales, Australia). Machinery for upsetting the edges of rolled-metal plates.

Claims.—(1.) In machines for upsetting the edges of rolled-metal plates, a clamping-device, in duplicate, consisting of two clamping-blocks, the faces of which towards the rotating hammers are formed with arcs concentric with the axis of rotation of the hammers, as specified. (2.) In machines for upsetting the edges of rolled-metal plates, rotating hammers, in duplicate, adapted to strike successive wiping or rolling blows upon the edges of a plate that may lie within the radius of the peripheral rotation of the hammers, as set forth. (3.) In machines for upsetting the edges of rolled-metal plates, rotating hammers in duplicate, each hammer consisting of an upper and a lower plate that form bearings for heavy roller strikers that project beyond the plates and are adapted to strike successive wiping or rolling blows upon the edges of a plate that may lie within the radius of the peripheral rotation of the roller strikers, as set forth. (4.) In machines for upsetting the edges of rolled-metal plates, clamping-blocks, in duplicate, for clamping and guiding the plate the edges of which are to be upset, such clamping-blocks having their faces adjacent to the hammers, formed with an arc that is concentric with the axes of the hammers, in combination with rotating hammers in duplicate, as and for the purposes specified. (5.) In machines for upsetting the edges of rolled-metal plates, a sizing and polishing appliance consisting of rollers in duplicate on the line of the plane of the plate, each roller being formed with a groove through which the formed dovetails will be hauled, whereby the width of the plate will be sized and the dovetails polished, as set forth. (6.) In machines for upsetting the edges of rolled-metal plates, the accommodating appliance for the self-adjustment of the sizing-apparatus, consisting of the two shafts m, m1, the crossheads O, O1, the studs or projections o, o1, the plungers n, n1, and the grooved rollers N, N1, whereby when either of the rollers N, N1 are pushed to one side or the other by inequalities in the width of the plate the whole of the parts shall move together, as specified. (7.) In machines for upsetting the edges of rolled-metal plates, in combination, the clamping-devices in duplicate with curved faces concentric with the axes of the hammers, rotating hammers adapted to strike the edges of the plate, and the sizing-device consisting of grooved rollers in duplicate for sizing the plates and polishing the dovetails, as and for the purposes set forth. (8.) The general arrangement, construction, and combination of parts in the machinery for upsetting the edges of rolled-metal plates, as described, as illustrated in the drawings, and for the several purposes specified.

(Specification, 7s. 3d.; drawing, 2s.)

No. 23775.—2nd December, 1907.—JOHN SLATER, of 14 Montana Street, Coolgardie, Western Australia, Gentleman. Double-faced traffic signal flag.

Claims.—(1.) A traffic flag having an obverse and reverse face for the separate or simultaneous giving of oppositely or differently meaning signals, substantially as set forth, and as illustrated in the drawings. (2.) A traffic flag having an obverse and reverse face mounted on two companion rods or staffs as a and b, and whereby the flag may be held by the right and left hand of the user in the giving of signals, substantially as set forth, and as illustrated in the drawings. (3.) A traffic flag having an obverse or reverse face in operative combination with and mounted on staffs or sticks as a and b, for the concurrent holding of the flag by the right and left hand, substantially as set forth, and as illustrated in the drawings.

(Specification, 2s. 9d.; drawings, 1s.)

No. 23780.—3rd December, 1907.—SEAY INTERNATIONAL ICE AND REFRIGERATION MACHINERY COMPANY, a corporation organized under the laws of the State of South Dakota, having its principal place of business at Tenth and Diamond Streets, Philadelphia, Pennsylvania, United States of America (assignees of William W. Seay, of Philadelphia aforesaid). Process of and apparatus for the production of ice and cold.

Claims.—(1.) In the process of refrigeration, the vaporisation and separation by heat of ammonia from a liquid which upon the separation of the ammonia is converted into a solid, and the reabsorption of the ammonia with said solid at a reduced temperature, whereby the liquid is re-formed. (2.) The process of refrigeration which consists in combining ammonia and a solid absorbent which liquefies ammonia and goes into solution with the same, vaporising and separating the ammonia from the solution, condensing the vapours so as to produce anhydrous liquid ammonia, vaporising said anhydrous liquid ammonia to produce a cooling effect, and then recombining said ammonia with the exhausted solid absorbent. (3.) In connection with the processes of claims 1 and 2, the use of thio-cyanate of ammonium (NH₄, CNS) as the absorbent material. (4.) In a refrigerating system, the combination with the condenser and refrigerator, of a combined generator and absorber for containing absorbent material, means for alternating heating and cooling said generator and absorber, and means for reversing the position of said generator and absorber to expose fresh surfaces of the absorbent material, substantially as described.

(Specification, 10s.; drawings, 2s.)

No. 23785.—4th December, 1907.—FREDERICK SARA, of “The Tors,” Yelverton, R.S.O., Devon, England, Merchant. Animal-traps.

Claims.—(1.) A trap to catch and kill wild animals without torturing them, which consists of a base plate, a pair of arms normally held extended against the influence of a spring by means of a double footplate, a yoke or arm connected to which engages a catch which is released by pressure on the footplate so that the arms spring upwards and grip the animal scissors-wise, the two halves of the footplate separating to let the arms rise between them, substantially as described and shown.