Mar. 22.] THE NEW ZEALAND GAZETTE. 873

No. 20627.—24th January, 1906.—RICHARD TROLLEY HUNTER, of Ivy Grove, Eaglescliffe, Durham, England, Gentleman. Improvements in methods of construction as applied to roofing and other structural purposes.

Claims.—(1.) In the construction of roofs, walls, and the like structural work, the combination with principals or main rafters consisting of sheet iron or rolled girders, of sheathing with scroll-shaped dependent extensions adapted to be threaded thereon, and panels or tiles interlocked therewith by returned edges, the whole forming when put together a reliable weather- and water-tight structural arrangement, substantially as and for the purpose described, and illustrated in Figs. 1 to 4A inclusive of the drawings. (2.) The use, in combination with sheathed principals or main rafters and panels or tiles interlocked therewith, of valley-plates furnished with returned flanges such as d¹ for the panels to hook on to, with or without a second flange or upset edging such as d² for preventing the penetration of water through the roof, substantially as described, and illustrated in Fig. 5 of the drawings. (3.) In combination with sheathed principals or rafters and overlapping panels interlocked therewith, the means for preventing stormwater penetrating between the laps, substantially as described, and illustrated in Figs. 6 and 7 of the drawings. (4.) The use, in combination with the general construction as indicated in the previous claims, of segmental corner-plates such as g clinched in position by cover-plates f, thereby affording additional protection to the structure at the intersection of the principals or rafters, substantially as described, and illustrated in Figs. 1, 8, and 9 of the drawings.
(Specification, 7s. ; drawings, 3s.)

No. 20629.—24th January, 1906.—WILLIAM HADLEY WOOD, of Lloyd Street, Petersburg, South Australia, Engine-driver. Improvements in railway brakes.

Claims.—(1.) The combination with one or more brake-shoes carried and operated by hangers, rods, rockshaft, and side-brake lever, of a cross-lever pivoted in a bracket at the end of the vehicle and attached at one end to said side-brake lever, substantially as described, and for the purpose set forth. (2.) The combination with one or more brake-shoes carried and operated by hangers, rods, rockshaft, and side-brake lever, of a jointed cross-lever pivoted in two brackets at the end of the vehicle and attached at one end to said side-brake lever, substantially as described, and for the purpose set forth. (3.) In brake gear for railway vehicles, a side hand-brake lever having a socket-piece or block adapted to engage the end of a sliding bar carried in brackets attached to the vehicle-body, substantially as described, and for the purpose set forth. (4.) In brake gear for railway vehicles, a sliding bar carried in fixed brackets and provided with means for operating the same in either direction, the means for moving in one direction comprising a pivoted weighted bell-crank and a collar on the bar, and the means for operating in the other direction comprising an arrangement of levers and connecting-rods, substantially as described. (5.) In brake gear for railway vehicles, the combination with a side-brake lever of a sliding bar carried in fixed brackets and adapted to engage a socket upon such lever, said sliding bar having the underface of its forward end bevelled, and being moved in one direction by a pivoted weighted bell-crank engaging a collar on the bar, and in the other by hand-levers and connections, substantially as described, and for the purpose set forth. (6.) In brake gear for railway vehicles, the combination with a sliding bar of four levers, one on each corner of the vehicle, such levers being pivoted to the vehicle-frame and connected by rods either directly or through a bell-crank lever to the sliding bar, substantially as described, and for the purpose set forth. (7.) In brake gear for railway vehicles, the combination with a sliding bar of a lever pivoted to the vehicle-frame and connected by a rockable plate also pivoted to the vehicle-frame, and by a rod to the sliding bar, substantially as described, and for the purpose set forth. (8.) In brake gear for railway vehicles, the combination with a brake lever of a vertical bar attached thereto and having a handle upon its upper end whereby the brake-block pressure can be increased or decreased, substantially as described. (9.) In brake gear for railway vehicles, the combination with a hand-lever of a vertical bar pivoted thereto having its upper portion grooved or corrugated, and passing through a bracket or guide with correspondingly grooved or corrugated adjacent face, against which it may be pressed by a wedge operated by a lever at either side of the vehicle, substantially as described, and for the purpose set forth. (10.) The means for locking a brake lever in any desired position, or for releasing the same from either side of a vehicle, comprising a vertical bar pivoted to the lever and having its upper portion grooved or corrugated, a bracket or guide
for the upper portion of such bar having its adjacent face correspondingly grooved or corrugated, and a wedge behind such bar connected to levers at either side of the vehicle, substantially as described.
(Specification, 7s. ; drawings, 4s.)

No. 20638.—22nd January, 1906.—HENRY ARTHUR GODDARD, of Ada Street, Concord, near Sydney, New South Wales, Australia, Contractor. An improved mode of building in concrete, and apparatus therefor.

Extract from Specification.—This invention relates to an improved mode of building hollow walls of concrete, whereby the wall-shell shall be constructed of but 1½ in. and upwards thickness of concrete, with an intermediate space between the two faces of the walls, such space being formed by means of collapsible frames or boxes, initially placed in position, the concrete shell being cast around the collapsible core. The external frames or moulds may be made of any suitable contour, so that joist supports or sills and mouldings of different kinds may be constructed at the same time that the wall is being built. Wood insertions, adapted to carry picture-rods or to afford a hold for wooden panelling and suchlike ornamentation, may also be introduced into the wall during the period of construction.
[NOTE.—The above extract from the specification is inserted in place of the claims.]
(Specification, 4s. 6d. ; drawing, 1s.)

No. 20644.—25th January, 1906.—JOHN GILL, of Beechwood Mains, Murrayfield, Edinburgh, Scotland, Gentleman. Improved means and apparatus for compressing air or other elastic fluid for the production of motive power and other purposes.

Claims.—(1.) Means and apparatus for compressing air or other elastic fluid, which consist of two pipes connected together at the top, and to an air-receiver at the bottom, in such a manner that water or other incompressible liquid may be circulated continuously through them, carrying air down the downward pipe, delivering the said air in a compressed condition into the air-receiver, and then passing on up the upward pipe to continue the circulation, and means for effecting the circulation of the water or other liquid, and for introducing the air to be compressed into the circuit at the upper end of the pipes, substantially as described. (2.) In an apparatus for compressing air or other elastic fluid in accordance with claim 1 hereof, the combination of a downward pipe a and an upward pipe b connected together at their upper ends, an air-receiver g having connected to it the lower ends of the pipes a and b, a pump h for circulating the water or other incompressible liquid, and a blower i for delivering the air to be compressed to the upper end of the downward pipe, substantially as described. (3.) In an apparatus for compressing air or other elastic fluid in accordance with claim 1 hereof, the combination of pipes a and b, an air-receiver g, a pump h, a blower i, and a reservoir d at the upper part of the upward pipe b, substantially as described. (4.) In an apparatus for compressing air or other elastic fluid in accordance with claim 1 hereof, the combination of pipes a and b, an air-receiver g, one or more air blowers or injectors, and an air-jet (or a series thereof) for supplying the air to be compressed to the upper end of the downward pipe a, and for keeping the incompressible liquid in circulation in the pipes a and b, substantially as described. (5.) In an apparatus for compressing air or other elastic fluid in accordance with claim 1 hereof, the employment of a siphon-pipe t, the upper end of which is connected to the upper end of the upward pipe b, and the lower end of which is immersed in liquid contained in a reservoir d, for the purpose of reducing the power required to keep the liquid in circulation in the pipes a and b, substantially as described.
(Specification, 10s. ; drawings, 2s.)

No. 20661.—31st January, 1906.—BENJAMIN TREWHELLA and WILLIAM TREWHELLA, trading as “Trehwella Bros.,” at Trentham, Victoria, Australia, Engineers and Ironworkers. An improved hauling and lifting lever-jack.

Claims.—(1.) An improved hauling and lifting lever-jack, comprising a short casing and a long rack, an operating-pawl having an inclined rib on one side and pivotally mounted on a lever fulcrumed upon a pin on the casing with a central bearing for said pin, a retaining-pawl pivotally mounted upon said casing, a spring rod for holding both pawls in engagement with the rack, and spring mechanism for releasing the pawls alternatively, substantially as set forth. (2.) In lever-jacks, a spring attached at one end to and coiled around a vertical