April 18, 1913. THE COLLIERY GUARDIAJN 793 —A— PLOWRIGHT BROS. LTD., Brampton Iron Works, Chesterfield. INDUCED DRAFT FAN IS A GOOD INVESTMENT Speciality COAL SCREENING & CONVEYING. Send for Catalogue 19 H. PERMITS the use of the waste heat in the flue gases by means of economisers, superheaters, &c. THE cost of a “ Sirocco ” * Induced craft Plant is about 30 to 40 °/0 of that of a chimney of equal capacity. THE power to drive the Fan varies from 3/4ths to 2 °/0 of the total power generated, while the saving frequently amounts to from 15 to ao °/0. INCREASES the steaming capacity of existing boilers and thereby increases the Works production. REDUCES the Coal Bill be- cause cheaper coal can be used than with natural draft. kA- 1*1» i SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER. CONSIDERABLY OVER 100 PLANTS H Estimates and Designs on application. Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon. WORK IN BRITAIN COLONIES. OPEN BRIDLE. Made also IB ox Nose. PONGABD Perfect Eye & Head Shield. Light I Comfortable I Durable ! Reasonable I Sole Agents : LEGARD& SON, Pit Pony Harness Makers and Contractors, LEATHER MERCHANTS, ’PHONE 11. Barnsley. WAELES, DOVE & Co.’s Patent BITUMASTIC Solution -------------- GIVES -- PERMANENT PROTECTION FROM CORROSION TO ALL IRONWORK. A BRILLIANT BLACK COLOUR. SUPPLIED READY FOR USE. EASILY APPLIED BY UNSKILLED LABOUR. CHEAPER THAN ORDINARY OXIDE PAINTS, OWING TO ITS GREATER COVERING CAPACITY AND LASTING QUALITIES. WRITE FOR PAMPHLET OF FULL PARTICULARS TO— Head Office—NEWCASTLE-ON-TYNE. Also at London, Liverpool, Manchester, Glasgow, Cardiff, Birmingham, Leeds, Hull, &c. Every Office on the Telephone - Telegrams “BITUMASTIC.” Brussels Exhibition: “Grand Prix?’ Roubaix Exhibition, 1911: “Grand Prix,” “RDS” STEAM TRAP LATENT Suitable for any Pressure. A large number of these traps have been in use for several years, and our experience has been so satisfactory that we have every confidence in recommending them to steam users. The workman- ship and material are of the highest quality, and it is altogether a far superior article to the many cheap bucket traps now on the market. CAST IRON BODY AND LID, HOPKINSONS “PLATNAM” Metal Valve & Seat. I 1 SPECIAL FEATURES. Simplicity. Reliable. Quick in action. No Dribbling. Strong Intermittent Water Discharge. Quick Cut-oif. Will lift its water 2 feet for every-! lb. steam pressure. Fitted with Valve and Seat of HOPKINSON’S “PLATNAM” METAL, which is five times harder than bronze and ad- mirably suitable for with- standing the cutting action of the water. Description. This steam trap is of the open float type, and consists in its simplest form of a Water Chamber A, Float with central guide B, Valve C, Water Inlet Pipe, and Water Discharge Pipe. The dis- charge pipe forms the guide for the float. The valve remains on its seat until the float has sunk low enough to touch the collar on valve; it then immediately begins to discharge. The Gallery or Water Pocket F is an important feature, as it fills with water when the float is at rest; when the float begins to rise from its lowest position, the water thus collected flows through the hole G int® the body A, thus ensuring a rapid elevation of the Float indepen- dent of a small amount of water passing into the trap. The valve is not rigidly connected with the bucket, and it is therefore held on to its seat until the Float acts on the Valve. This device is, therefore, most valuable under all con- ditions of working, but more especially when the volume of water entering the trap is small. Its lifting effect on the Float is indicated by the sharpness with which the water discharge is cut off. Write for Catalogue 660, 4th Edition, post free, which illustrates and describes HOPKINSON S PATENT SAFETY BOILER MOUNTINGS AND VALVES for High Pressure Superheated Steam, High-class Exhaust and Water Sluice Valves for Condensing Plants, &c., Automatic Exhaust Valves, Reducing Valves, Steam Traps, &c., &c. J. HOPKINSON & CO. LD.. No 236. HUDDERSFIELD.