Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 135,687 pages of information and 217,205 images on early companies, their products and the people who designed and built them.
Also H. Hazard & Co, of Bedminster Bridge Iron Foundry, Bristol
1849 Advertising as having taken over the business of the British and Foreign Heating and Ventilating Co, Iron-Founders, Smiths, and General Manufacturers at Bedminster Foundry. They would be manufacturing Lewis's Patent Revolving Iron Shutters and the Improved Arnott Ventilating Valve. 
1850 'IRON ROOFS.-Messrs. H. Hazard and Locke, of this city, have erected an unique and beautifully constructed iron roof on the premises of Mr. George Leigh, at the Horse Repository, College-green. Parties visiting this establishment will be much struck with its light and elegant appearance.'
1851 Listed as Iron Founders and iron and brass bedstead makers
1851 Advert: 'BEDMINSTER BRIDGE IRON-FOUNDRY.
TO IRON FOUNDERS, SMITHS, & OTHERS.
MESSRS. BARNARD, THOMAS, & CO. ARE INSTRUCTED TO SELL BY AUCTION,
On the PREMISES, Bedminster Bridge, Bristol, on WEDNESDAY, 19th February, 1851, and following days (without reservation),
ALL the valuable STOCK-IN-TRADE, PLANT, PATTERNS, TOOLS, and other Effects of Messrs. H. Hazard and Co., General and Fancy Iron-founders, &c.:
Comprising stock-in-trade of iron, plain and ornamental castings, grates, iron weights, sash weights, tubing, &c.; also, an excellent high-pressure steam-engine, equal to 8-horse power, boiler, furnace, and fittings; water tank, cupolas, drying stove, fan blast, iron shafting, cones and pulleys, iron weigh bridge to weigh 10 tons, large crane, lathes, a great quantity of moulding iasks, benches, vices, anvils, bellows, forges, grindstones, tools, large collection of iron and wood patterns, counting house fittings, copying machines, spring cart, and a variety of other effects. Catalogues will be ready for delivery in a few days, and the whole may be viewed two days prior to the Sale, which will commence punctually each Morning at Five Minutes past 11. For further particulars apply to LIONEL OLIVER BIGG, Esq., Stephen-street; or to the Auctioners, Albion Chambers, Bristol.'