1670
THE NEW ZEALAND GAZETTE.
[No. 46

reducing-valve through which oxygen is drawn from the oxygen-supply, all arranged and constructed substantially as described with reference to the drawings.

(Specification, 9s.; drawing, 5s.)

No. 24336.—28th April, 1908.—WILLIAM EDWARD GARFORTH, of Snydale Hall, Normanton, Yorkshire, England, M.Inst.C.E., Colliery-owner. Improvements in the arrangement and construction of parts of respiration apparatus for use in coal-mines and other places.

Claims.—(1.) A respiration apparatus of that type in which the wearer has a tightly fitting face-piece, from the interior of which the used air is conducted to a regenerator-case 6 containing caustic alkali, and from which regenerator the purified nitrogen is supplied to the face-piece along with the necessary supply of oxygen derived from a storage-cylinder, characterized by the fact that in order that the wearer can quickly place all the body-carried parts on his person, insure that all the parts shall always automatically come into exactly those relative positions previously determined as the most advantageous, and that the weight shall be more uniformly distributed over the user’s body, a jacket 10 of flexible material to fit the body of the wearer is provided, having an air-tight flexible storage-bag 8 constructed in its rear lower part to contain a store of purified nitrogen, two oxygen-cylinders 10 connected by a pipe 11 being fixed one on each side at about the hips of the wearer, while a regenerator-case 6 is fixed at the back of said jacket and connected by flexible pipes 7 to the storage-bag 8, a flexible pipe 5 extending from the storage-bag, and another flexible pipe 4 extending from the regenerator-case, both being detachably connected (by screwed union-joints 39, 40) to the face-piece, a reducing-valve being fixed on the pipe 11 connecting the oxygen-cylinders through which the necessary quantity of oxygen is supplied to the face-piece. (2.) A form of construction of respiration apparatus according to claim 1, characterized by the fact that two oxygen-storage cylinders 10 are carried one at about each of the wearer’s hips, arranged in approximately horizontal positions, and said cylinders are curved longitudinally to fit those parts of the wearer’s body against which they are carried, while they are connected by a pipe 11 passing round the wearer’s back, and said pipe carries a pressure-gauge 37 in front of said jacket 10. (3.) A form of construction of respiration apparatus according to claims 1 and 2, characterized by the fact that the top of the regenerator-case 6 has curved guard-wings 36 reaching the shoulders of the wearer to guide the top of the regenerator-case 6 away from obstructions it may contact with. (4.) The arrangement and construction of respiration apparatus in which the various body-carried parts are constructed with, or are adapted to be attached to, a jacket to fit the body of the wearer, whereby the weight carried is more advantageously and uniformly distributed, while the entire body-carried apparatus can be placed on the wearer’s body complete in itself, and with the various parts in their proper positions at one operation, substantially as described with reference to the drawings.

(Specification, 9s.; drawing, 3s.)

No. 24352.—5th May, 1908.—PEARSON FIRE ALARM, LIMITED, of 62 King William Street, London, England, Manufacturers of Fire-alarm Apparatus (assignees of Alfred Henry McNeil, of 43 Beech Hall Road, Higham’s Park, Essex, England, Engineer). Improvements in electric fire-alarms and thermo-indicators.

Claims.—(1.) An electric fire-alarm apparatus, comprising thermal strips fixed at both ends, and adapted to actuate cooperating electrical contacts at different rates in such manner that for ordinary changes of temperature the contacts are moved one behind the other in the same direction without coming together, whilst on a sudden rise of temperature or a gradual rise above a predetermined limit the leading contact is overtaken by the following contact to close the alarm circuit. (2.) An electric fire-alarm apparatus, comprising a pair of thermal strips fixed at their ends, and formed of different sensitiveness to changes of temperature, plungers connected to the strips, electrical contact arms in the paths of the plungers, and supporting contacts arranged to move one behind the other in approximately the same path, an adjustable fixed stop or contact in the path of the moving contacts, and a casing enclosing the contacts, substantially as described. (3.) The improved electric fire-alarm apparatus, substantially as described with reference to the drawings.

(Specification, 5s.; drawing, 2s.)

No. 24370.—9th May, 1908.—JOSEPH YEO DIXON, of Auckland, New Zealand, Civil Servant. An improved gate-latch.

Claims.—(1.) A gate-latch comprised by a metal plate having a plain surface on one side and a projection upon the other side at one end of the plate, such projection having a forward surface inclining downwards and outwards to the extremity of the plate, in combination with means whereby the latch may be pivoted to a gate-post, and means whereby it may be normally retained in a position such that the inclined projection will extend over the edge of the post adjacent to the gate, substantially as specified. (2.) In combination, a gate-latch comprised by a metal plate having a plain surface on one side and a projection upon the other side at one end of the plate, such projection having a forward surface inclining downwards and outwards to the extremity of the plate, and a metal plate upon which the latch is laid and pivoted, provided with studs projecting from its front surface between which the latch is placed, and means whereby the plate may be secured upon a gate-post, substantially as specified. (3.) In combination, a gate-latch comprised by a metal plate having a plain surface on one side and a projection upon the other side at one end of the plate, such projection having a forward surface inclining downwards and outwards to the extremity of the plate, a metal plate against which the latch is laid and pivoted, studs projecting from the front face of the plate, a curved slot formed in the plate, a pin or screw passing through such slot into the gate-post, and a pin passing through the plate into the post at a position concentric with the slot, such pin also serving as the pivot for the latch, substantially as specified. (4.) The improved gate-latch constructed and operated substantially as described and explained, and as illustrated in the drawings.

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

No. 24374.—8th May, 1908.—WILLIAM CHRISTIAN JOHAN SCHLIE, of 137 Sinclair Drive, Langside, Glasgow, Lanark, Scotland, Engineer. Improvements in machines for the manufacture of wire nails and the like.

Claims.—(1.) In machines for the manufacture of wire nails, the method and means by which two or a plurality of two nails are produced simultaneously from one wire bank or more in two independent operations, the first by the intermediary of dies forming an indentation at opposite sides of the wire, which constitutes the partial formation of the points, and the other by corresponding dies which work at right angles to the first dies, and complete the points by cutting away the superfluous metal, substantially as described and shown on the drawings. (2.) In machines for the manufacture of wire nails, the general arrangement and combination of parts operating substantially in the manner described and shown on the drawings.

(Specification, 6s.; drawing, 5s.)

No. 24376.—11th May, 1908.—EDWIN MERRITT JAHRAUS, of 225 Kiefaber Street, Dayton, Ohio, United States of America, Gentleman. Ore-concentrators.

Extract from Specification.—The invention relates generally to an improvement in ore-concentrators, and particularly to a concentrator in which the separation is primarily effected under the influence of a pneumatic current automatically produced in the operation of the machine. The main object of the invention is the production of a main frame and a tilting-frame movably journalled in the main frame, the separator-box, blast mechanism, and operating means therefor, being supported by and movable with the tilting-frame. In connection with this construction, the main frame is formed to permit movement of the tilting-frame and connected parts, and means are provided for adjusting the tilting-frame during operation of the machine, whereby to secure in each instance that inclination of the separator-box best adapted for the handling of the particular ore being treated. Another object of the invention is the construction of rifle-bar supports and rifle-bars to insure an effective connection between these parts in assembling the box structure, with the result of properly tightening the permeable fabric forming the bottom of the box and avoiding any obstruction to the effective passage of the blast current through said fabric. Another object of the invention is the provision of a pneumatic cushion to form the immediate support of the ore-box, said cushion being arranged to permit