March 14, 1913. THE COLLIERY GUARDIAN 533 ______________________________________________________________________________________________________________________________________________________________________________________________________________ ___________ ________________________________________________________________________ ____________________________________________________________ __________________________ Pit Head Frame. K Erected in Works for inspection. Walter Scott Ltd. Leeds, LEEDS STEEL WORKS. England. MANUFACTURERS OF BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS, TRAMRAILS AND PERMANENT WAY RAILS, Ac. PLOWRIGHT BROS. LTD., Brampton Iron Works, Chesterfield. Special i ty- COAL SCREENING & CONVEYING, j-aA Jef • SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER, Example of 10 in. x 6 in. v 421b. R.S Joists curved for Framework to Roadway. ROLLED STEEL JOISTS for PIT PROPS, FRAMEWORK TO ROADWAYS, &c. STRUCTURAL STEELWORK FOR BUILDINGS, &c. Mild Steel Blooms, Billets, Slabs, Tinbars. Rounds & Flats. Rolls cut for Special Sections and to approved quantities. Books of Sections and other information on application. __________________________________________________ CONSIDERABLY OVER 100 PLANTS H WORK IN BRITAIN COLONIES. Estimates and Designs on application Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon. OPEN BRIDLE. t IVIi.cl.- also in Box Nose. ?ONGAR0 Perfect Eye & Head Shield. _______ Light I Comfortable ! Durable ! Reasonable ! Sole Agents : LEGARD & SON, Pit Pony Harness Makers and Contractors, LEATHER MERCHANTS, ■PHONE 11. Barnsley. __________________________________________ WAILES, 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 <5f 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:” Allahabad, 1910. Roubaix Exhibition, 1911: “Grand Prix.” ___ ___ ___ ___ ___ ___ __________________________ ___ ___ ___ “ROS” STEAM TRAP PATENT 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. SPECIAL FEATURES. HOPK INS ON Simplicity. Reliable. Quick in action. No Dribbling. Strong Intermittent Water Discharge. Quick Cut-off. 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 Q 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. post free, which illustrates and CAST IRON BODY AND LID, HOPKINSON’S “PLATNAM” Metal Valve & Seat. Write for Catalogue 660, 2nd Edition, 343 pages, r__ ___ ____________ 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. & GO. LD.. HUDDERSFIELD.