25. Hyatt, T. Jan. 3. Drawings to Specification.

Transparent materials. — For fireproof glazing, alum plates are enclosed between sheets of ordinary glass. The upper or outer glass sheet may be replaced by a coating of transparent varnish.

Forming ribbed plates or sheets; dividing glass. — Plates or sheets for window, roof, and pavement lights are formed with strengthening-ribs which, to facilitate division, are made in pairs with an intervening scratch or channel for the passage of the diamond. Lens-like pieces may be grouped into a single sheet, the separation of the pieces being facilitated by channels similar to those above described.

154. Stocker, A. S Jan. 18.

Moulding. - Relates to the manufacture, by means of dies in a fly-press or otherwise, of caps or stoppers, unions, and shields for feeding-bottles, the apparatus being also applicable for making pots or jars, table and chair castor balls, and bedstead furniture, in glass, porcelain, or similar materials. Fig. 1 shows an arrangement for moulding a cap for a feeding-bottle. The matrix is made in two parts B, C fitted in a conical recess in a bed-plate. The upper die is forced down into the matrix by a plunger. The air escapes through a hole F. The finished article is discharged by raising the matrix by means of a screw B so that the parts can be separated. In another arrangement, the bottom of the matrix is separate from the sides, which are forced together or moved apart by right and left handed screws. Fig. 5 shows a machine for making a stopper or cap with a screw on its end, such as is described in Specification No. 1149, A.D. 1871, [Abridgment Class Stoppering &c.]. The screw-thread on the stopper is formed by forcing the plastic material into an internally-screwed ring b forming part of the matrix.

This ring is fixed to a spindle c having a threaded portion c¹, the pitch of which is equal to that of the screw b. By rotating the spindle c, the screwed ring can be withdrawn from the moulded article. Fig. 6 shows an arrangement for moulding a shield for a feeding-bottle. The plunger L² serves to guide the matrix L, and also to make the central perforation in the shield. The moulded shield is discharged by raising the matrix L by means of a treadle. Fig. 8 shows a plan of a machine for moulding unions for feeding-bottles. The articles are first moulded solid by compressing the material between a lower die N and a similar upper die, and the holes are then formed through them by passing pins O horizontally through the moulds ; the pins are carried by a plunger suitably guided and actuated. These unions may be formed with stems, to facilitate firing and glazing, the stems being fitted in holes in clay slabs in which they are supported during firing. The clay slabs or saggers may be moulded between dies in a press, the lower die being lifted to discharge the finished slab.

813. Neville, S. March 18.

Annealing. — An annealing-lear A, preferably constructed of iron, is heated by means of flues B, through which combustion products from a furnace pass to a flue pipe D, or by gas jets, the gas being introduced by pipes C. Doors E are arranged opposite the glass works for the introduction of the articles to be annealed, and doors G, opposite the warehouse, for the removal of the annealed goods. Doors J give access to the flues B for lighting the gas jets, and for admitting air to cool the lear. Several lears may be arranged in one flue, which is fitted with dampers or flues to direct the heat to any required lear. The cooling may be accelerated by allowing a current of cold air to pass through the flues. The lears may be lined with or wholly or partially made of firebrick.

2621. Codd, H. Sept. 3. Drawings to Specification.

Bottle necks, making. — The moulds, in which the bottles are blown, have projections formed in them to produce inclined projecting ridges inside the neck when the bottle is blown in the mould, the projecting ridges being provided to retain the ball stopper while the contents of the bottle are being poured out.

3149. Worthington, G. B. Oct. 24. [Provisional protection only.]

Bottle necks, making. — An internal screw-thread is formed in the neck of a glass bottle by closing the neck of a mandrel and removing the mandrel by unscrewing it.

3216. Perry, G. Oct. 30.

Moulding; pressing. — In an apparatus for moulding glass, the bed-plate c, Fig.1, running on rails b on a carriage a, carries the mould d, which is operated on by a plunger i connected above, by an adjustable vertical screw, with a cross-beam h contained in a casting k, to which is secured a vertical slide l working in a guide m. The cross-beam h is operated through crank arms f by a hand-lever g. Fig. 4 shows the press as arranged for working by steam power. The rotating plunger s works in a forward arm r, and carries a foot-plate t with one, two, or more moulders which descend into corresponding moulds v^l fitted to a circular revolving plate x on the travelling bed w. Steam power is applied by an eccentric and crank y attached to the slide l, the hand-levers and cranks being disconnected.

3437. Wagner, H. E, Nov. 18.

Transparent and translucent materials. — Relates to the treatment of paper or parchment in order to render it more or less transparent and to enable any writing &c. thereon to be easily removable by washing. The material is saturated with benzene, and then immediately immersed in or coated with a fluid siccative or rapidly-drying varnish. A suit­able siccative or varnish may be made by boiling a mixture of lead chips, zinc oxide, litharge, and Venetian turpentine in linseed varnish, the com­pound being then allowed to cool and settle and the top layer being decanted off and mixed with white West Indian copal lac and sandarac dissolved in spirits of wine or ether. In some cases the paper &c. is coated on one side with a mixture of the benzene and the siccative, and, after a time, with the siccative alone, the other side being afterwards similarly treated; finely-powdered chalk is then rubbed in on both sides. The paper or parchment, thus treated, is applicable for writing, drawing, tracing, &c, and, by writing on it with a copying-ink, one or more press copies may be readily taken from it. When thick paper is employed, it may be used as writing-tablets. According to the Provisional Specification, turpentine or analogous substances may be used in place of the benzene.

3362. Neville, S. Dec. 20. [Provisional protection only.]

Ornamenting; moulding. — A rotating table, provided with a graduated dial plate, is fitted with a die, or dies. The formed article having been secured to the table, while still hot, melted coloured glass is dropped upon it and is then moulded to an ornamental form by the die or dies. Or the coloured glass is pressed into its required ornamental form, and is then fixed to the formed article while both are still hot.