Feb. 1.] THE NEW ZEALAND GAZETTE. 279

at one end and having a bifurcated extension, an arm extending rearwardly from said shaft and having its extreme end turned at an angle and there provided with a rib or lug, a shaft or spindle adjustably mounted on said arm, a gear-wheel mounted on said spindle, an eccentric thereon embraced by said bifurcated extension, and a driving-wheel rotating the grinding-wheel and having a pinion meshing with said gear-wheel to rotate the same and cause the eccentric to rock the grinding-wheel frame. (12.) A grinding-machine comprising a base, a grinding-wheel rotatably supported thereon, means for rotating such wheel, and means for presenting the work to the wheel, which means consist of a frame pivoted on said base and having fingers or rests, and a combined handle and clamp, substantially as shown, screwing into the frame to clamp the work between said fingers. (13.) A grinding-machine comprising a vibrating grinding-wheel frame, a rotatable grinding-wheel therein, an eccentric for vibrating said frame, mechanism for rotating the eccentric, and means substantially as shown whereby the eccentric may be shifted out of operation and locked in different positions to simultaneously hold the frame stationary and at different altitudes. (14.) In a grinding-machine, the combination of a supporting frame, a driver, a journal pivoted on the frame, a fly-wheel mounted therein and driven by such driver, such journal and fly-wheel being adjustable with respect to the driver and in the arc of a circle with the frame as a centre. (15.) A sickle-grinder constructed and operating substantially as shown and described.
(Specification, 12s. 6d.; drawings, £2 2s.)

No. 12289.—10th January, 1900.—HEMMING CHRISTIAN JENSEN, of Stanway, Manawatu, New Zealand, Blacksmith. An improvement in stump-jacks.

Description.—“The object of this invention is to provide an improvement in my stump-jack for which I obtained Letters Patent No. 8177, dated the 6th day of January, 1896. In my stump-jack, as then invented, the lever with the ratchet back was raised in the iron frame by means of a lower pawl and a handle and an upper pawl on an axle or fulcrum, the lower pawl raising the lever and the upper pawl holding the lever in position while the handle and lower pawl were getting into position for another grip. The improvement I am about to describe is in the arrangement of the handle and pawls, and the result is that in both raising and lowering the handle the ratchet lever is raised. As shown in the drawing herewith, the handle a has the lower movable short pawl b, and the upper movable and longer pawl c, both pawls working on the handle by pins d, the handle operating on the axle or fulcrum e. The pawl b will engage the ratchet on the handle being depressed, and the pawl c when the handle is raised, the stump-jack thus performing its function more quickly than hitherto.”

Claim.—In the stump-jack mentioned, the improved handle and pawls described.
(Specification, 1s.; drawings, 3s.)

No. 12298.—8th January, 1900.—PARNELL RABBRIDGE, of Sydney, New South Wales, Electrician. An improved arrangement of switching-appliances for use with switch telephones.

Claims.—(1.) In telephone-circuits, a switch having three positions, the first position being normal, and such that the telephonic instrument and battery are connected between its home-line and earth; the third position is such that the instrument and battery are connected between the line-selector board and earth or return; the intermediate position being such that the instrument and battery are connected between the home-line and the line-selector board, the earth or return being cut out of circuit, and such switch being so constructed that if placed in the second or third positions it shall be restored to its normal position by hanging the telephonic instrument upon it as specified. (2.) In telephone-circuits, a switch having two positions, such that when placed in its first or normal position the telephonic instrument and battery shall be connected between the home-line and earth, and when placed in its second position the instrument and battery shall be connected between the line-selector board and earth or return, and such switch being so constructed that if placed in the second position it shall be restored to its normal position by hanging the telephonic instrument upon it as specified. (3.) In telephone-circuits, placing a switch, such as that referred to in claims 1 and 2, between the telephonic instrument and battery and the line-selector board, as and for the purposes set forth. (4.) The special form of switch, whether for two or three positions, as shown in Figs. 2 and 3 of the drawings and for the purposes specified.
(Specification, 9s. 3d.; drawings, 10s. 6d.)

No. 12310.—13th January, 1900.—HUGH LAING MAINLAND, of Burke’s, New Zealand, Mechanical Engineer. Improved locking hairpin.

Claims.—(1.) In hairpins, the combination of any of the forms now in use, and known as plain or fancy hairpins, with a bent and twisted leg near one point, the loop touching the other leg, and the twist so formed (such as in Figs. 1, 2, 3, and 4) that a slight turn given to the points will lock the pin (such as in Figs. 2 and 4); or it can be unlocked by a reverse turn, or used without locking (such as in Figs. 1 and 3), substantially as set forth, and as illustrated in the drawing. (2.) In hairpins, the combination of any of the forms now in use of plain or suitable fancy hairpins with bent and twisted legs so formed (as in Figs. 5, 6, 7, and 8) that a slight turn given to the points will lock the pin (such as in Figs. 6 and 8); or it can be unlocked by a reverse turn, or used without locking (such as in Figs. 5 and 7), substantially as set forth, and as illustrated in the drawing.
(Specification, 1s. 9d.; drawings, 3s.)

No. 12313.—18th January, 1900.—GEORGE WEBSTER, of Wigram Street, Parramatta, New South Wales, Engineer. Improvements in machines for extracting gold from finely divided metalliferous materials.

Claims.—(1.) In machines for extracting gold from finely divided metalliferous materials, the combination with a feeding-hopper and a catching- or receiving-depression of a comparatively long and shallow closely covered-in passage or chamber, having a fabric or similar lining on its bottom, substantially as described and explained. (2.) In machines for extracting gold from finely divided metalliferous materials, the combination with a comparatively long and shallow passage or chamber, having a fabric-lined bottom, of a top or cover whose under-surface is silvered or amalgamated, substantially as described and explained. (3.) In machines for extracting gold from finely divided metalliferous materials, the combination with a comparatively long and shallow passage or chamber of water-pipes partially sunk into the bottom of said passage or chamber, substantially as described and explained, and as illustrated in the drawings. (4.) The combination and arrangement all together of the mechanical parts set forth and explained, forming an improved machine for extracting gold from finely divided metalliferous material, substantially as described and explained, and as illustrated in the drawings.
(Specification, 5s. 6d.; drawings, 10s. 6d.)

No. 12314.—18th January, 1900.—LARS CHRISTIAN NIELSEN, Constructor, and PETER VALDEMAR FREDERIK PETERSEN, Computator, both of Copenhagen, Denmark. Foam-removing apparatus for heating and pasteurizing of fluids.

Claims.—In heating or pasteurizing apparatus consisting of a reservoir supplied with a stirrer, and surrounded by a steam-mantle into which steam is introduced so as to heat the reservoir, through which the fluid to be heated continually flows, while the water accumulated through condensation of the steam, is continually led away:—(1.) The arrangement of drip-rings on the outside of the reservoir—i.e., in the steam-chamber—for the purpose of leading the condense-water from narrow zones of the heating-surface. (2.) The arrangement of plates on the stirrer across its axis, these plates extending almost to the side of the reservoir and serving to separate the fluid in layers, so that mixing of the fluid-particles in a direction parallel with the stirrer-axis is virtually hindered. (3.) The arrangement of holes in the plates stated in claim 2, these holes serving as outlets for the air disengaged during the foam-removing process. (4.) The arrangement of a vent-cock on the waste-pipe or in the bottom of the steam-chamber, through which the air carried along by the steam and disengaged by the condensation of the steam, is forced.
(Specification, 5s. 3d.; drawings, 3s.)

No. 12317.—18th January, 1900.—HENRY JAMES KIMMAN, and EDWARD NASH HURLEY, both of Chicago, Illinois, United States of America, Manufacturers. Improvements in direct-acting engines, the invention being particularly adapted to pneumatic hammers.

This invention relates to a new and useful improvement in direct-acting engines, commonly known as pneumatic hammers. The engines of the class to which the construction illustrated in the drawings relates are designed to be operated by compressed air supplied thereto through a flexible tube or hose, and engine being held to and guided in its work by an operator. Means are provided within convenient reach of the operator for regulating the admission of compressed air to the engine, to the end that the same may