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160 Incorporated 1866. THE LOCOMOTIVE. Charter Per- petual. Issues Policies of Iiisnrauce after a Careful luspectiou of tie Boilers. COVERING ALL LOSS OR DAMAGE TO BOILERS, BUILDINGS, AND MACHINERY ALSO COVERING LOSS OF LIFE AND ACCIDENT TO PERSONS ARISING FROM Steam Boiler Explosions. Full information conceniing the plan of the Company's operations can be obtained at the Or at any Agency. J. M. ALLEN, President. W. B. FRANKLIN, Vice-Prest. J. B. PIERCE, Secretary. FRANCIS B. ALLEN, 2d Vice-Prest. E. J. MURPHY, IVI.E., Consulting Engineer. lioai'd. of J. M. ALLEN, President. FRANK W. CHENEY, Treas. Cheney Brothers Silk Manufacturing Co. CHARLES M. BEACH, of Beach & Co. DANIEL PHILLIPS, of Adams Express Co. RICHARD W. H. JARVIS, Prest. Colt's Fire Arms Manufacturing Co. THOMAS O. ENDERS, President of the U. S. Bank. LEVERETT BRAINARD, of The Case, Lockwood & Brainard Co. Gen. WM. B. FRANKLIN, late U. S. Commissioner to the Paris Exposition. NELSON HOLLISTER, of State Bank, Hartford. GENERAL AGENTS. THEO. H. B.\BCOCK, CORBIN & GOODRICH, LAWFORD & McKIM, C. E. ROBERTS, H. M. LEMON, C. C. GARDINER, L. B. PERKINS. W. G. LINEBURGH & SON. BURWELL & BRIGGS, MANN & WILSON. ZOLLARS & McGREW, R. P. MANLY, W. S. HASTIE & SON, PETER F. PESCUD, CHIEF INSPECTORS. R. K. MfMURRAY, WM. J. FARRAN, F. S. ALLEN, WM. HEAFORD, A. B. ECOPF, F. S. ALLEN. J. H. RANDALL, C. A. BURWELL, J. B. WARNER, T. E. SHEARS, I -B. F. JOHNSON, T>ii'eotoi's. Hon. henry C. ROBINSON, Attomey-al-Law, Hartford. Conn. Hon. FRANCIS B. COOLEY, of the NatioLal Exchange- Bank, Hartford, Conn. EDMUND A. STED>IAN, Treasurer of the Fidelity- Co., of Hartford, Conn. GEORGE BURNHAM, Baldwin Locomotive Works, Philadelphia. Hon. NATHANIEL SHIPMAN, Judge United Stateb Circuit Court. C. C. KIMBALL, Pres. Smyth Mfg. Co., Hartford. Conn. PHILIP CORBIN. of P. & F. Corbin, New Britain,. Conn. New York Citt. Philadelphia. Pa. Baltimore, Md. I Boston, Mass. 1 Providence, R. I. Chicago, III. St. Loris, AIo. Hartford, Conn. Bridgeport, Conn. Cleveland, Ohio. San Francisco, Cal. Denver, Col. ( BiRiMingham, Ala. -) Charleston, S. C. ( New Orleans, La. OFFICES. Ofiicc. 2S."> Broadway. 482 Walnut St. 22 So. Holliday St. 12.n Milk St. 29 Wevbosset St. 112 QuincvSl. 404 Market St. 218 Main Street. " 2 Sanford Building. " 208 Superior St. " 306 Sansome St. " Mining Ex. Bl'g. " Morris Building. 44 Broad St. 188 Gravier St.
Witt ^momtitivt PUBLISHED BY THE HARTFORD STEAM BOILER INSPECTION AND INSURANCE COMPANY. New Seuiks — Vol. XIV. HARTFORD, CONN., NOVEMIiEH, 1893. No. 11. Cracked Plates. There are certain classes of defcct.s iu boilers, that boiler owners know about, and endeavor to avoid. Among these are the deposit of sediment and .scale, leakage around tube-ends and along riveted joints, and overloaded safety-valves. These defects rather force themselves on the attention of the owners; but there are many other kinds of defects that are not so obvious, though they may be fully as dangerous. Among these less patent defects are cracked plates. Frequently cracks start from the edge of the plate, opposite a rivet-hole, in the girth-joint that comes over the fire. Such cracks are often due to distress at the joint arising from an improper arrangement of the feed-pipe; for if the comparatively cold Fig. 1. — A Cracked Plate. feed-water is discharged on or near the fire-sheet, it chills the shell in that vicinity, and produces a powerful local contraction of the metal, which is quite sufficient to start the joints, or, under some circumstances, to even crack the solid plate. But whatever the cause of the cracks, they are likely to first appear at the edge of one of the fire- sheets, and to extend gradually inward. Often they are stopped by running into the rivet hole, and do not extend further. Frequently, however, they run past the rivethole, or cross it and extend into the sheet on the further side of it. It then becomes very important to check their further progress. This may often be done by drilling a small hole through the sheet at the very extremity of the crack. This hole may after- w'ards be filled with a rivet, or it may be tapped and filled with a screw plug. Besides these fire-sheet cracks there are numerous other kinds, due to different causes. For example, the strength of a plate may be injured by overheating, or "burning," so as to develop a serious crack under the ordinary rimning conditions, without any assignable reason except that it has become too weak to withstand the strain that comes upon it in ordinary usage. Cracks are often discovered, too, along flanges
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THE LOCOMOTIVE. [January, a o o M -
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32 Incorporated 1866. THE LOCOMOTIV
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48 Incorporated 1866. THE LOC (J MO
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