June 25.] THE NEW ZEALAND GAZETTE. 1465

source of electricity and which is adapted to be reciprocated, a second electrode which is adapted to make contact with the first and accompany it through a portion of its excursion, and which is adapted also to receive a motion relatively to the first electrode, such second electrode being also in electric connection with the same source of electricity as the first, and an arrester which is adapted to stop the movement of the second electrode and break its contact with the first. (2.) An electric-circuit breaker characterized as described in claim 1, and in which the reciprocation is derived from an electro-motor adapted to be regulated in speed and provided with a mechanism which is adapted to vary the amplitude of the reciprocation. one electrode consisting of a wheel which is adapted to be rotated, and the other electrode consisting of a disc which by means of a ratchet-and-rawl device is adapted to be turned through a small angle in each reciprocation, the arrester being a screw adapted to be adjusted in position, and the surfaces which make and break contact being immersed in a bath of insulating-fluid. (3.) An electric-circuit breaker consisting of a combination of two fixed electrodes which are in connection with a source of electricity, two spring-pressed pivoted electrodes connected with the same source of electricity, an electro-magnet and two spring-pressed pivoted armatures, the electro-magnet being adapted to be energised from an independent source of electricity, and the armatures being each adapted to alternately make and break a contact of the above-mentioned electrodes and also to alternately complete and break the energising circuit of the electro-magnet, the period of contact of the electrodes being adapted to be regulated by adjusting screws, and the period of vibration of each of the armatures being adapted to be regulated by an adjustable weight and wire connections adapted to place the contact of two of the electrodes either parallel to or in series with the contact of the two other electrodes. (4.) A resonator adapted to produce audible sensations from minute electric impulses, consisting of a combination of two soft-iron pole-pieces, a number of permanent magnets having their ends in contact with the pole-pieces, a tympanum the rim of which is secured to one of the pole-pieces, a central actuating permanent magnet, and a bobbin of fine wire mounted either on the pole of the central actuating magnet or on the tympanum. (5.) A resonator characterized as described in claim 4, in which the bobbin is provided with two coils of wire, and in which there is a switch which is adapted to place the two coils of wire in series or in parallel as desired, or to cut one out of the circuit. (6.) An apparatus for locating mineral deposits, consisting of a combination of a source of electricity, an inductor which is adapted to emit fluctuating electric impulses, two portable electrodes which are electrically connected, having the battery and inductor in intermediate series, two other portable electrodes which are electrically connected, and a resonator which is in intermediate series therewith, such resonator being adapted to produce audible sensations from electric impulses. (7.) An apparatus for locating mineral deposits, characterized as described in claim 6, in which the inductor consists of the following parts: An electro-magnet doubly wound, the primary circuit being traversed by electricity from the before-mentioned source, a repeating break for the primary circuit, a primary-circuit condenser, and the secondary circuit having a condenser and a sparking-gap. (8.) An apparatus for locating mineral deposits characterized as described in claims 6 and 7, in which both the primary and the secondary circuits may be switched along the wires on the two arms of the magnet, either in series or in parallel, and in which the condenser of the secondary is adjustable in capacity, and in which the secondary current is adapted to traverse a sparking-gap and the earth by the electrodes in parallel. (9.) An apparatus for locating mineral deposits characterized as described in claims 6, 7, and 8, and in which the electro-magnet has an adjustable armature to vary the air gap, and in which the break for the primary is constructed as described in claims 1, 2, or 3, and in which the secondary circuit has a motor-driven high-frequency break, and in which the resonator is constructed as described in claims 4 or 5.

(Specification, £1 2s. 6d.; drawings, 4s.)

No. 16134.—25th March, 1903.—THOMAS EASTON DEVONSHIRE, of Pirbright, Chislehurst, County of Kent, England, Civil Engineer. Improvements in troughs or conduits more especially intended for underground electric cables.

Claims. — (1.) Lengths of trough or conduit made of U-shaped or equivalent metal, engaging or spigot-and-socket ends, and with perforated, reticulated, or “expanded” metal extending from end to end, this metal structure being imbedded in concrete moulded therearound so as to form a U or equivalently shaped length, substantially as described. (2.) Lengths of trough or conduit made of U-shaped or equivalent metal, engaging or spigot-and-socket ends connected together by rods, and having perforated, reticulated, or “expanded” metal extending from end to end, this metal structure being imbedded in concrete moulded therearound so as to form U or equivalently shaped lengths, substantially as described. (3.) Lengths of trough or conduit made of U or equivalently shaped end pieces connected by rods at their upper ends, and perforated, reticulated, or “expanded” metal connected to the rods and extending at each end around the end pieces, and with concrete moulded around the metal parts and engaging therewith so as to form U or equivalently shaped lengths, substantially as described. (4.) Lengths of trough or conduit made of U or equivalently shaped metal, engaging or spigot-and-socket ends formed with flanges or recesses, and connected at their upper ends by rods to which perforated, reticulated or, “expanded” metal is secured, the said perforated, reticulated, or “expanded” metal being shaped to correspond with the end pieces and extending from end to end, concrete being moulded on the said parts so as to form a length of U or equivalently shaped trough or conduit in which the metal parts are keyed and imbedded, substantially as described and illustrated in Figs. 1 to 6 of the drawings. (5.) Lengths of trough or conduit made of U or equivalently shaped sheet-metal end pieces bent inwards at their upper ends, and perforated, reticulated, or “expanded” metal of a shape corresponding to the end pieces and extending from end to end, concrete being moulded on the said parts so as to form a length of U or equivalently shaped trough or conduit in which the metal parts are keyed and imbedded, substantially as described with reference to Figs. 10, 11, and 12 of the drawings. (6.) Lengths of trough or conduit made of U or equivalently shaped sheet metal, end pieces bent inwards at their upper ends so as to receive metal rods to which perforated, reticulated, or “expanded” metal is connected, the said perforated, reticulated, or “expanded” metal being of a shape corresponding to the end pieces and extending from end to end, concrete being moulded on the said parts so as to form a length of U or equivalently shaped trough or conduit, in which the metal parts are keyed and imbedded, substantially as described, and illustrated in Figs. 10, 11, and 12 of the drawings. (7.) In combination with lengths of trough or conduit according to the preceding claiming clauses, a lid or cover consisting of concrete in which is imbedded perforated, reticulated, or “expanded” metal, substantially as described. (8.) In combination with lengths of trough or conduit according to the preceding claiming clauses, a lid or cover consisting of a combination of perforated or reticulated or “expanded” metal, strengthened by rods, and having concrete moulded thereover, substantially as described. (9.) The modifications of the described constructions so as to constitute an “earth sheath” in the troughs or conduits, substantially as explained, and illustrated by Figs. 15 to 21 of the drawings.

(Specification, 10s. 6d.; drawings, 3s.)

No. 16136.—24th March, 1903.—ALLAN LANGLEY HEIGH-TON, of 231, St. Asaph Street West, Christchurch, New Zealand, Salesman. An improved attachment to the heels of boots and the like.*

[NOTE.—The title in this case has been altered. See list of Provisional Specifications, Gazette No. 29, of the 16th April, 1903.]

Claims.—(1.) As an attachment to a boot or shoe heel, a rubber layer immediately beneath the wearing top piece, said rubber layer being of a size to fill up and occupy the rear portion of the heel, to which it is secured by its inner edge only, as specified and shown. (2.) The combination in a partially formed heel of a boot or shoe of a layer of rubber secured to the main portion of the heel by its inner edge only, a piece of leather cut diagonally which with the rubber together are equivalent to one complete lift, and a leather wearing top piece superincumbent upon the whole, as described, and for the purpose set forth.

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

No. 16332.—12th May, 1903.—ALFRED MOUL, of 105, Shaftesbury Avenue, London, England, Gentleman. Improvements in target apparatuses and the like where no projectiles are employed.

Claims.—(1.) A target apparatus comprising a gun or simulated firearm having a hammer and trigger, means for cocking the hammer, a target with indicators, and selecting electrical devices between the gun or simulated firearm and the target whereby the point aimed at on the target shall be automatically selected in aiming, and indicated when the trigger is pressed by the marksman. (2.) A target apparatus comprising a gun or simulated firearm having a hammer and trigger, said firearm having universal mountings, a target