3280
THE NEW ZEALAND GAZETTE.
[No. 95

No. 23447.—11th September, 1907.—ARTHUR OWEN PENWARDEN, of Okato, New Plymouth, Taranaki, New Zealand, Wheelwright. An improved cow-bail.

Claims.—(1.) A cow-bail having a movable member working in guides, and pivotally connected to a frame by hinge-bolts or the like, substantially as specified and illustrated. (2.) A cow-bail consisting of the parts constructed, arranged, and operating, substantially as specified, and as illustrated in the drawing.

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

No. 23455.—10th September, 1907.—“Z” ELECTRIC LAMP SYNDICATE, LIMITED, of 20 St. Helen’s Place, London, E.C., England (assignees of Hermann Zerning, of Johann Sigismundstrasse 11, Halensee, near Berlin, Germany, Electrical Engineer). Improvements in the manufacture of filaments for incandescence electric lamps.

Claims.—(1.) In the manufacture of incandescence electric-lamp filaments free from carbon, the treatment of the raw filaments with gases obtained in vacuo by heating a hydrogen- and nitrogen-containing phosphorus compound such as phospham, or an oxygen or sulphur compound thereof. (2.) In the manufacture of incandescence electric-lamp filaments in accordance with the preceding claiming clause, the employment of phospham either in the production of the raw filaments or by causing its decomposition products obtained by heating in vacuo to act on the raw filaments. (3.) In the manufacture of incandescence electric-lamp filaments in accordance with the preceding claiming clauses, first completely exhausting the vessel in which the filaments are to be decarbonised in the presence of phospham or its equivalent, and then heating up to about 130° centigrade, then closing the connection with the air-pump and slowly heating up to from 800° to 1,000° centigrade. (4.) The treatment of incandescence electric-lamp filaments for the removal of carbon therefrom in the manner described under the several examples.

(Specification, 5s. 6d.)

No. 23466.—13th September, 1907.—THE KONOMAX ROCK-DRILL SYNDICATE, LIMITED, of Loveday House, Loveday Street, Johannesburg, Transvaal (assignees of Wilhelm Mauss, of The Rand Central Electric Works, Brakpan, Transvaal, Mechanical Engineer). Improvements relating to rock-drilling machines and to water-sprays therefor.

Extract from Specification.—The present invention relates to percussive rock-drilling machines, and more especially to means for supplying water for lubricating the drill, clearing the hole of débris, and preventing the diffusion of floating dust from the hole. In the particular machine illustrated, the air employed for mixing with the water is that exhausted from the machine, the latter being of the type described in the co-pending application No. 23467 for “Improvements in fluid-actuated rock-drilling” and other percussive machines,” wherein a distributing valve i is located within the piston j, and is adapted to exhaust into the hollow piston-rod. The water is supplied from a water-chamber k surrounding the neck l of the machine cylinder m, in which chamber it is subjected to pressure, for example, by means of the cylinder of the drilling-machine itself, as described in application No. 23468 for “Improvements in cutting machines.”

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

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

No. 23467.—13th September, 1907.—THE KONOMAX ROCK-DRILL SYNDICATE, LIMITED, of Loveday House, Loveday Street, Johannesburg, Transvaal (assignees of Wilhelm Mauss, of The Rand Central Electric Works, Brakpan, Transvaal, Mechanical Engineer). Improvements in fluid-actuated rock-drilling and other percussive machines.

Extract from Specification.—This invention relates to percussive machines and tools operated by expansible fluid, and is in many respects a modified construction of the machine described in Patent of United States No. 844161, issued 12th February, 1907. In such machine constant pressure is applied to a relatively small rear-pressure area, and fluid

is caused to work expansively against a relatively larger front-pressure area on the backward stroke, at the end of which stroke such expanded fluid is exhausted and the working-blow is effected by the uncushioned pressure on the rear face. Admission to and exhaust from the front-pressure area is controlled by a valve, whilst cut off is afforded by the movement of the piston closing a port. The primary object of this invention is to construct a machine of the type referred to with an internal valve, so that the entire machine is compact, and has no protruding parts which are liable to be damaged when handling the machine or which may be inconvenient for other reasons.

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

(Specification, 10s. 3d.; drawing, 1s.)

No. 23468.—13th September, 1907.—THE KONOMAX ROCK-DRILL SYNDICATE, LIMITED, of Loveday House, Loveday Street, Johannesburg, Transvaal (assignees of Wilhelm Mauss, of The Rand Central Electric Works, Brakpan, Transvaal, Mechanical Engineer). Improvements in cutting-machines.

Extract from Specification.—The invention consists broadly in the combination with the relatively fixed and the relatively movable member of means operating upon a prescribed relation of such members being reached to feed the relatively fixed member forward, said prescribed relation being in general the limit of movement permitted between the members. More specifically the invention consists in the combination with such members of means for applying pressure to the relatively fixed member to feed the same forward, means for checking such movement, and means operating upon the prescribed relation of the members being reached to release said checking means and permit or cause the pressing means to act. In carrying out the invention fluid-pressure would preferably be employed for feeding forward and checking the relatively fixed member. Thus, hydraulic pressure may be employed both for feeding and checking, the feeding and checking means being in that case combined or not, or air-pressure may be employed for feeding and hydraulic pressure for checking, it being preferred to check with hydraulic pressure in every case owing to the inexpandibility of liquid.

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

(Specification, 12s.; drawing, 2s.)

No. 23470.—11th September, 1907.—FREDERICK JAMES SWANSTON, of Dunedin, New Zealand, Brushmaker. A broom-handle coupling.

Claims.—(1.) In brooms and their handles, in combination, a clip capable of securing a handle to a broom, all substantially as described and as explained, and as illustrated in the drawing. (2.) In brooms and their handles, in combination with same, a clip for adding and securing additional length to the handle for reaching heights, all substantially as described and as explained, and as illustrated in the drawing.

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

No. 23480.—17th September, 1907.—JOSEPH ROSS, of 70 Ingestre Street, Wellington, New Zealand, Hotelkeeper. An improved grease-trap.

Claims.—(1.) A grease-trap of the nature indicated, provided with an inclined wall upon one side, and a channel or chute located along the upper edge of said wall, substantially as specified and illustrated. (2.) For the purpose indicated, in combination, a grease-trap of the nature indicated, and a cover sliding in grooves upon the top of said trap, substantially as specified and illustrated. (3.) A grease-trap, comprising in combination a trough, partitions therein, an inclined wall upon one side, a channel or chute located along the upper edge of said wall, and a cover sliding in guides upon the top of the trap and extending across said chute, substantially as specified.

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