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50 THE L O C O 31 U T I ^' E , [April, thick; and au examinatiou of the detached tube-end showed that it had l)een expanded with a Prosser expander, the tool that had been used being evidently designed for a finch head. For the benefit of those who may be unfamiliar with the Prosser expander, we may say that it consists of series of pieces shaped like A in Fig. 2, and arranged in a circle around a central pin. This central pin is tapering, and when the expander has been put in position in the tube, tlie segments are set out forcibly against the tube by driving in the \nn. In this way the end of the tube is turned over against the head, and the tube is expanded so as to fit the tube-hole tightly. The tube is also enlarged slightly ju;;t inside the head. When the expander has been set out against the tube sufficiently in one position, the pin is drawn out and the tool is sliifted slightly and Fig. 2.— ILLUSTRATI^'G the Actiux of the Prossek Expander. driven auaiii. In the better boiler shops tubcr-ends are mostly rolled, nowadays, and except in special cases where the rolling operation is not convenient, the Prosser expander is used very little. Fig. 2 illustrates what happens when, as in the case under consideration, the tubes are expanded with a Prosser tool tliat is too small for the JieaJ. The projection B, that is intended to enlarge the tube just inside the head, and which ought to just clear the liead on the inside, does not clear it, but forces the metal of the tube against tlie inner edge of the head, so that the tool and tube sheet act like the two blades of a pair of shears. The inevitable result is, that the tube is badly strained at this point, or, if the tool is new and sharp and the work carelessly done, it may even be sheared in two. At all events, the tube is pretty sure to be so badly strained that its strength is destroyed, and sooner or later it will give trouble. In the present instance the trouble was no doubt aggravated by the fact that the boiler was fed directly over the fire-slieet. The lower tubes were subjected to the chilling action of the feed-water, and must have contracted violently at times, and experienced
: 1893.1 Tin-: LOCOMOTIVE. 5^ severe stniins. which made themselves most felt at the poiut where the tubes had been weakeued by the expander. Inspector's Reports. FeIUIIAUV, IS'Jo. During this month our inspectors made 5,762 inspection trips, visited 11,068 boilers, inspected 3.820 both int
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PRESENTED BY y rv
Page 8 and 9: ~\; -^ A .
Page 10 and 11: ^ rtE.'pTWE © (§) THE LOCOMOTIVE.
Page 12 and 13: THE LOCOMOTIVE. [January, a o o M -
Page 14 and 15: 6 THE LOCOMOTIVE. [January. In both
Page 16 and 17: 3 THE LOCOMOTIVE. [Januahy, been em
Page 18 and 19: ^Q THE LOCOMOTIVE. [January, ])rove
Page 20 and 21: 42 THE LOCOMOTIVE. [January, Sit «
Page 22 and 23: 14 THE LOCOMOTIVE. [January. After
Page 24 and 25: 16 TlIK hOCOMO'J'i Vi.. Incorporate
Page 26 and 27: 18 THE LOCOMOTIVE, [Februaky, stren
Page 28 and 29: 20 THE LOCOMOTIVE. [February, could
Page 30 and 31: 22 THE LOCOMOTIVE. [February, Natur
Page 32 and 33: 24 THE LOCOMOTIVE. [Februart Paper
Page 34 and 35: 26 THE LOCOMOTIVE. [February, injur
Page 36 and 37: 28 THE LOCOMOTIVE. Pit *0tiim$tlt
Page 38 and 39: 30 THE LOCOMOTIVE. [February, jured
Page 40 and 41: 32 Incorporated 1866. THE LOCOMOTIV
Page 42 and 43: 34 THE LOCOMOTIVE, [March, pressure
Page 44 and 45: 36 T II E L () C O yi O T l\E. [Mar
Page 46 and 47: 38 'i^il^ LOCOMOTl V i:. [Makcu, (1
Page 48 and 49: 40 THE LOCOMOTIVE. [March, art & Co
Page 50 and 51: 42 THE LOCOMOTIVE. [March, Ml ^^^'3
Page 52 and 53: 44 THE LOCOMOTIVE. [Makch, should h
Page 54 and 55: ^(3 THE LOCOMOTIVE. [March, power o
Page 56 and 57: 48 Incorporated 1866. THE LOC (J MO
Page 60 and 61: 52 THE LOCOMOTIVE. [April, (This is
Page 62 and 63: 54 THE LOCOMOTIVE. [April, Castle,
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Page 68 and 69: ,60 THE LOCOMOTIVE. L-^p«il, nortl
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Page 72 and 73: 64t Incorporated 1866. THE LOCOMOTI
Page 74 and 75: 66 THE LOCOMOTIVE. [May, much as we
Page 76 and 77: 68 THE LOCOMOTIVE. [May, diameter o
Page 78 and 79: 70 THE LOCOMOTIVE. [May, by tirlce
Page 80 and 81: 72 THE LOCOMOTIVE. [May, Boiler Exp
Page 82 and 83: 74 THE LOCOMOTIVE. [May, HARTFORD,
Page 84 and 85: 76 THE LOCOMOTIVE. [Mat, weeks amou
Page 86 and 87: '^8 THE LOCOMOTIVE. [Ma\% coat-tail
Page 90 and 91: 82 THE LOCOMOTIVE, [June,
Page 92 and 93: 84 THE LOCOMOTIVE. [June, Boiler Ex
Page 94 and 95: 86 THE LOCOMOTIVE. [June, (105.)
Page 96 and 97: 88 THE LOCOMOTIVE. [June, The Heliu
Page 98 and 99: go THE LOCOMOTIVE. [JrxE, Mkt Elttt
Page 100 and 101: 92 THE LOCOMOTIVE. [June, ills lett
Page 102 and 103: •94 THE LOCOMOTIVE [June, .21 ia
Page 106 and 107: 98 THE LOCOMOTIVE. [July, worked ov
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: ^QO THE LOCOMOTIVE. [July, Inspec
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102 THE LOCOMOTIVE. [July, (132).
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104 THE LOCOMOTIVE. [July, " The am
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106 THE LOCOMOTIVE. [July, tttSttlt
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-iQQ THE LOCOMOTIVE. [July, and als
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110 THE LOCOMOTIVE. [July without t
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112 THE LOCOMOTIVE. [July. Incorpor
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114 THE LOCOMOTIVE. [August, to whi
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116 THE LOCOMOTIVE. [August, tion.
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118 THE LOCOMOTIVE. [August, (147.)
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-120 THE LOCOMOTIVE. [August, A lar
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•J22 THE LOCOMOTIVE. [August, git
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124 THE LOCOMOTIVE [August, hard en
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126 THE LOCOMOTIVE. [August, The Bu
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128 THE LOCOMOTIVE. [August. Incorp
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^30 THE LOCOMOTIVE. [September, pau
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132 THE LOCOMOTIVE. [September,. iu
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-[34 THE LOCOMOTIVE. [September, Fi
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136 THE LOCOMOTIVE, [September, .35
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138 THE LOCOMOTIVE, [September, add
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140 THE LOCOMOTIVE lSeptember, On a
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d42 THE LOCOMOTIVE. [September, cas
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144 Incorporated 1866. THE LOCOMOTI
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146 THE LOCOMOTIVE. [Octobek, in pl
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i48 THE LOCOMOTIVE. [October, Natur
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[50 THE LOCOMOTIVE. [October, Curti
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•152 THE LOCOMOTIVE. [Octobeb, an
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^54 THE LOCOMOTIVE. [Octobeb, Mkt e
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-[56 THE LOCOMOTIVE. [October, Tlie
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158 THE LOCOMOTIVE. [October, Of co
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Page 170 and 171:
162 THE LOCOMOTIVE. [November, that
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: 16^4 THE LOCOMOTIVE. [XOVEMLER, I
Page 174 and 175:
166 THE LOCOMOTIVE. [November, boil
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168 THE LOCOMOTIVE. Sit Ktttmttit c
Page 178 and 179:
170 THE LOCOMOTIVE. [November, KILL
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172 THE LOCOMOTIVE [November, Boile
Page 182 and 183:
174 THE LOCOMOTIVE. [:November, sel
Page 184 and 185:
Page 186 and 187:
178 THE LOCOMOTIVE. [December, grap
Page 188 and 189:
: 180 THE LOCOMOTIVE. [December, In
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^82 THE LOCOMOTIVE. [December, that
Page 192 and 193:
184 THE LOCOMOTIVE. [December, HART
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186 THE LOCOMOTIVE. [December, The
Page 196 and 197:
188 THE LOCOMOTIVE [Decembeb, angle
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190 THE LOCOMOTIVE. [December, Such
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i92 Incorporated 1866. THE LOCOMOTI
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INDEX, Equivalent of heat, redeterm
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