Prospect Mill, Bolton

of Little Bolton

• 1877 'ENGINE CHRISTENING AT PROSPECT MILL .... It is to hold some 50,000 or 60,000 spindles, all self-actors.... The engine is of immense proportions, .... It is a 90-horse condensing beam engine, with low pressure cylinder of 48[?] inches having a stroke of seven feet. The high pressure cylinder is 42 inches diameter, with a stroke of four feet, cast on a tall ornamental stand. The side pipes are fitted with double casing valves, with Musgrave's patent slip motion. This expansion is very simple and effective, and not liable to get out of order. By it the governor acts directly upon the steam admission valves, thereby obtaining the full boiler pressure of steam upon the piston at all times and allowing only such quantity of steam into the cylinder as will keep the engine running at a uniform speed of 29 1/2 revolutions per minute. The engine beam is 25 ft long and about 12 tons weight. The connecting rod is 19ft. long, of wrought iron. The crank shaft is Bessemer steel, which, with the wrought iron crank, weighs five tons. The piston rods and all the main working parts are of steel. ...The fly wheel is 27ft. 9in. diameter made in ten segments and spur segments bolted in the fly wheel arms. The spur wheel is 21ft. 10in, diameter, 5in. pitch 15in. broad, working into a pinion 7ft. 1in. diameter, fly wheel weigh. The fly wheel weighs 40 tons. The engine is capable of turning 600 indicated horses power. .... The engine we may add, has been built by Messrs. Musgrave and Sons, engineers, Bolton, who have also supplied the mill gearing. The workmanship reflects credit on the firm, and Messrs. J. Smith, A. Smith, and W. Walsh, of the firm of Messrs. Musgrave and Sons, are deserving of commendation for the successful carrying out of the work. ...'

• 1891 Directory (Bolton): Listed. More details

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