June 6, 1913. THE COLLIERY GUARDIAN. 11S9 accumulator acid into the cells, and other utensils, which greatly facilitate the economical working of an up-to-date “ Ceag ” lamp cabin. In this connection we may also refer to the plans of various “ Ceag ” lamp cabins designed on new lines, by which the distribution and the collecting in of the lamps is considerably accelerated, a great saving of labour being thus attained. Besides, there are statistics and testimonials which show that the maintenance of properly-equipped and well-managed “ Ceag ” lamp cabins does not amount to more than 2|d. per lamp per week, including all labour, repairs, acid, current, &c.—i.e., not more than for oil safety lamps, notwithstanding the great advantages of the “ Ceag” lamp. In addition to the Prize lamp there are other types of “ Ceag ” lamps exhibited, a few of which are well worth mentioning, viz.:—Light lamps for officials, surveyors, managers, &c.; bull’s eye lamps of various sizes and candle-power (up to 6-candle power); sinking lamps (16-candle power); pocket and hand lamps of various sizes. There is also a model of the “ Ceag ” miners’ cap lamp, as used by colliers in United States of America. The company have already installed many thousands of these lamps in English collieries, to the entire satisfaction of the users, and the works are able to turn out 3,000 lamps per week. W. AND T. AVERY LIMITED. Messrs. W. and T. Avery Limited, of the Soho Foundry, Birmingham, exhibit one of their patent automatic conveyor weighing machines attached to a Babcock and Wilcox bucket conveyor. This machine automatically registers and keeps an accurate record of L I J’. I . • Avery Automatic Conveyor Weighing Machine (Recording Apparatus). (W. & T. Avery Limited). Messrs. Firth’s well-known brands of bar iron, specially adapted for colliery purposes, such as links for wagons, cages, &c. Another exhibit is a sample double side steel tipping wagon for contractors’ work, and a steel colliery tub, both of strong but light design; also a sample steel tub bottom, pressed from single sheet, for use with timber tubs, of which several thousands have been supplied to a leading Yorkshire colliery. THE HERBERT FROOD 00. LIMITED. Messrs, the Herbert Frood Company Limited, of Chapel-en-le-Frith, show some interesting applications of their “ Ferodo ” compounds, exemplifying its remark- able frictional properties. “ Ferodo,” it may be said, is composed of chemical affinities, which mature under heat friction, forming a bond cementing the fibres together, thus preventing abrasion of the surface and the formation of escaping particles (which friction would ignite). The bonding—a patented feature—and the rapid diffusion of heat peculiar to the fabric, constitute a non-sparking surface. The coefficient of “ Ferodo ” is 0’5, and it is not affected by oil or water—it engages and releases instantly, with smooth rising power. The durability is many times greater than hard oak, and it lasts longer than metal of even thickness, and being non-abradent the drum surface is maintained highly polished and true. It is obvious that the fabric finds an important application in mining, and many of the distinctive exhibits on this stand are of the kind which best secure convection, being taken from the colliery. Thus, there are several types of hollow and solid post blocks fitted with “ Ferodo” fibre and a special radiator device, one of the latter having come from : the Rothervale collieries. A patent adjustable post j brake is also shown, as well as several examples of I the “ Ferodo ” bonded asbestos lining. One of these is a lining from the brake of a Mather and Platt electric winding engine after being in use for eight months at Felling Colliery, Northumberland. Metal liners were previously used, and required renewing every month. Another interesting exhibit is a Ferodo fibre lining from one of the pits, of the Wigan Coal and Iron Company Limited. The original thickness was Jin. Winding speed is 4,000 ft. per minute, and starting load 7 tons. It had been in use six months where wood I blocks previously lasted one month, and were always smoking. The lining was not removed on account of “Ferodo” Lined Clutch. (The Herbert Frood Company Limited.) wear, but owing to the wood post to which it was fixed having split. There is also a Ferodo fibre lining from Fletcher, Burrows and Co. Limited, Atherton Collieries, Lancs, where it was used on the post brake of a No. 1 Chanters winding engine. Original thickness 1 in. This lining was in use 11 months, while the wood blocks ' previously used lasted one month. A fibre lining from | the Florence Colliery, Longton, is also shown after j four and a-half months’ wear, and another from the | Earl of Ellesmere’s Bridgwater Collieries, Wharton I pit No. 2, after 18 months’ wear. The wood blocks j previously used lasted six to eight weeks. The type of ! brake is an understrap 14 ft. long. Mention may also I be made of a specimen of wood block taken from jinney I wheel, White Moss Colliery, Lancs.; a Ferodo fibre lining ; from Bradford Colliery, in a shaft 930 yards deep and a I starting load of 12 tons, after 12 months’ wear, where I wood blocks lasted three months only ; a lining from a Lancashire pit 1,200 yards deep (original thickness I f in.), after nine months’ use—the 5 in. poplar blocks previously used lasted five weeks. HALSBY AND CO. Messrs. Halsby and Co. Limited, of 43, Cannon-street, E.C.. show a cheque protector, which stamps a “ limit line ” completely through the cheque, breaking the fibres of the paper into the shape of letters, and at the same time forcing an acid-proof indelible ink into the paper. INTERNATIONAL CHANNELLING MACHINES LIMITED. This Sheffield firm have an extensive exhibit of various forms of the “ Siskol ” coal-cutter, “ Siskol ” hammer drill, and the “ Siskol ” air compressor. The celebrated “ Siskol ” stope drill, which won the £2,500 prize given by the Transvaal Government and Chamber of Mines, is shown. Since the competition, and as a result of experience the net weight of material carried by the conveyor over the weighing machine, the total weight can be read at a glance at any moment. The weight recording mechanism, which is shown in the illustration given herewith, is enclosed in a steel case and cannot be tampered with. The machine is eminently suitable for weighing in mines, collieries, &c., where there is not sufficient head-room for a hopper weigher to weigh the material as it passes on to, or is received from, the conveyor. BRITISH OXYGEN CO. LIMITED. The British Oxygen Company Limited, of Elverton- street, Westminster, S.W., have an attractive display of oxy-acetylene weldin g and cutting tools, these being shown in operation, as well as many other industrial applica- tions of oxygen, such as cylinders for rescue and other purposes, pressure-reduction valves, &c. There is also an ingenious air-liquefying apparatus, which is largely used for research and demonstration purposes in educational and technical institutions. WILLIAM FIRTH LIMITED. This Leeds firm show three examples of their steel girder settings for supporting the roof in collieries and mines, viz.:—'a) In the form of semi circular arch with fish joint; (6) a longitudinal steel girder supported by Firth’s steel props, with special ends to prevent the legs or props from falling inwards; (c) framework fastened with angle cleats. In addition, there is shown a number of Firth’s steel props as used at the face, of which upwards of half a million have been supplied to some of the leading collieries in the Midlands. There is also a section stand of steel joists, British standard sections from 24 in. to 3 by 1J inches, and in addition samples of |g|w/.o. ■ ■F/ 0 j BT/o ?; J F/ ° To fl / -fl <■I i I 1 Shewing how Ferodo Fabric can be fixed to a Post Brake without Special Preparation. Ferodo Lining fitted to existing Lagging on a Band Brake. Discs for Cranes or Friction Drives. “ Ferodo ’’-lined Brakes. (The Herbert Frood Company Limited.)