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Incorporated 1866. Charter Per- petual. Issues Policies of Insurauce after a Careful Inspection of tie Boilers. COVERING ALT. LOSS OR DAMAGE TO BOILERS, BUILDINGS, AND MACHINERY, AND DAMAGE RESULTING FROM LOSS OF LIFE AND PERSONAL INJURIES, CAUSED BY Steam Boiler Explosions. Full information concerning the plan of the Company's operations can be obtained at the oozMnp^-isr^'s office, haetfoed, consrztsr., Of at any Agency. J. M. ALLEN, President. J. B. PIERCE, Secretary. W. B. FRANKLIN, Viee-Prest. L. B. BRAINERD, Treasurer. FRANCIS B. ALLEN, 2d Vice-Prest. L. F. MIDDLEBROOK, Asst. Sec. E. J. MURPHY, M. E., Consulting Engineer. J?oa,rcl of J. M. ALLEN, President, FRANK W. CHENEY, Treas. Cheney Brothers Silk Manufacturing I !o. CHARLES M. BEACH, of Beach & Co. DANIEL PHILLIPS, of Adams Express Co. RICHARD W. II. JARVTS, Prest. Colt's Fire Arms Manufacturing Co. LEVERETT BRAINARD, of The Case, Lockwood
8!te Joc0Wfltte. PUBLISHED BY THE HARTFORD STEAM BOILER INSPECTION AND INSURANCE COMPANY. Vol. XXII. HARTFORD, CONN., DECEMBER, 1901. No. 12. Furnace Arch Bars. The erection of brick settings for horizontal tubular boilers raises a number of problems in connection with the expansion and contraction of the walls as they are 'alternately heated and cooled; and if these are not well understood, the settings are likely to crack and give a good deal of trouble. But if the setting is correctly designed, there should be no great difficulty in erecting it in such a manner that it will have a long life, and do good service. Fig. 1. — I / O o o o .£> Showing the Arch Bars in Position. BOILER There is one part of the setting, however, which offers special difficulties, and which is forever getting out of order, if it is not put in carefully and correctly. We refer to the arch over the back connection, where the setting closes up against the hack head of the boiler. All the other walls of the setting are vertical, or nearly so; but in this place the bricks must be set in the form of an arch, or its equivalent, and the result is,
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