US Patent Class 122
LIQUID HEATERS AND VAPORIZERS
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| DF | CLASS NOTES | |
| 1 R | DF | PLANTS |
| 2 | DF | .~ Garbage |
| 3 | DF | .~ Motor vehicle |
| 1 A | DF | .~ Air heaters |
| 1 B | DF | .~ Once through |
| 1 C | DF | .~ Feed water heaters |
| 4 R | DF | MISCELLANEOUS |
| 4 A | DF | .~ Electric boiler |
| 4 C | DF | .~ Water-cooled stoker |
| 4 D | DF | .~ Catalyst |
| 5 | DF | GAS-PRODUCER |
| 5.51 | DF | AIR-INJECTED |
| 5.52 | DF | .~ Combustion gas and vapor contact |
| 6 R | DF | INDUSTRIAL |
| 6.5 | DF | .~ Port |
| 6.6 | DF | .~ Tuyeres |
| 6.7 | DF | .~.~ Forge |
| 7 R | DF | .~ Waste heat |
| 7 A | DF | .~.~ Steel converter |
| 7 B | DF | .~.~ Additional burner |
| 7 C | DF | .~.~ Waste sulfite |
| 7 D | DF | .~.~ Carbon monoxide |
| 8 | DF | .~ Water firebox |
| 9 | DF | .~.~ Water tube type |
| 6 A | DF | .~ Water-cooled walls |
| 6 B | DF | .~ Bosh plates |
| 6 C | DF | .~ Skew arch coolers |
| 10 | DF | FOR FLUID FUEL BURNER |
| 11 | DF | ROTARY |
| 12 | DF | ROTATABLY SUPPORTED |
| 13.1 | DF | STAND BOILER |
| 13.2 | DF | .~ Electric |
| * | DD | .~ Fire tube and water tube |
| 16 | DF | .~.~ Fluid fuel |
| * | DD | .~ Fire tube |
| 17 | DF | .~.~ Fluid fuel |
| * | DD | .~ Water tube |
| * | DD | .~.~ Below boiler |
| 18 | DF | .~.~.~ Fluid fuel |
| * | DD | .~.~ Casing |
| 19 | DF | .~.~.~ Fluid fuel |
| 14 | DF | .~ Fluid fuel |
| 15 | DF | .~ Solid fuel |
| 20 R | DF | SUBSIDIARY |
| 20 A | DF | .~ Subsidiary-heater firebox |
| 20 B | DF | .~ Subsidiary-heater offtake flue |
| 29 | DF | ANNULAR FIREBOX |
| 30 | DF | MAGAZINE |
| * | DD | INDIRECTLY HEATED |
| * | DD | .~ Separate fluid |
| 32 | DF | .~.~ Surface |
| 33 | DF | .~.~.~ Furnace |
| 34 | DF | .~.~.~ Separator |
| 31.1 | DF | INDIRECTLY HEATED SEPARATE INJECTED FLUID |
| 31.2 | DF | .~ Submerged flame |
| 35 | DF | ACCUMULATOR |
| 36 | DF | AUXILIARY STEAM HEATER |
| 37 | DF | COMPARTMENT |
| * | DD | .~ Auxiliary |
| 38 | DF | .~.~ Draft regulator |
| 39 | DF | FILM |
| 40 | DF | FLASHER |
| 41 | DF | .~ Fluid fuel |
| 42 | DF | FIRE AND WATER TUBE |
| 43 | DF | .~ Fluid fuel |
| 44.1 | DF | FIRE TUBE |
| 44.2 | DF | .~ With baffle in flue |
| 49 | DF | .~ Horizontal and vertical |
| * | DD | .~ Horizontal or inclined |
| * | DD | .~.~ Water firebox |
| 50 | DF | .~.~.~ Flue |
| 51 | DF | .~ Horizontal |
| 52 | DF | .~.~ Plural |
| 53 | DF | .~.~.~ Water tube |
| * | DD | .~.~ Central firebox |
| 54 | DF | .~.~.~ Double outlet |
| 55 | DF | .~.~ Cylinder |
| * | DD | .~.~ Depending fire tube |
| 56 | DF | .~.~.~ Rear of bridge wall |
| * | DD | .~.~ Double water firebox |
| 57 | DF | .~.~.~ Alternate smoke return |
| 58 R | DF | .~.~ Drop water firebox |
| 59 | DF | .~.~.~ Circulation conduit |
| * | DD | .~.~.~ Double |
| 60 | DF | .~.~.~.~ Alternate smoke return |
| 61 | DF | .~.~.~ Drop water baffle |
| 62 | DF | .~.~.~ Front and rear water baffle |
| 63 | DF | .~.~.~ Front water baffle |
| 64 | DF | .~.~.~ Interposed combustion chamber |
| 65 | DF | .~.~.~ Rear water baffle |
| 66 | DF | .~.~.~ Water coking chamber |
| * | DD | .~.~.~ Water grate |
| 67 | DF | .~.~.~.~ Intermediate draft |
| 68 | DF | .~.~.~ Water tube |
| * | DD | .~.~.~.~ Feed heater |
| 69 | DF | .~.~.~.~.~ Check-valved |
| 70 | DF | .~.~.~.~ Feeding air |
| 71 | DF | .~.~.~.~ Solid baffle |
| 58 FB | DF | .~.~.~ Fire box construction |
| 72 | DF | .~.~ Projecting into firebox |
| 73 | DF | .~.~.~ Drop water firebox |
| * | DD | .~.~ Return and reverse |
| 74 | DF | .~.~.~ Drop water firebox |
| 75 | DF | .~.~ Return fire tube |
| 76 | DF | .~.~.~ Drop water firebox |
| 77 | DF | .~.~.~.~ Internal water tube |
| * | DD | .~.~.~ Water firebox |
| 78 | DF | .~.~.~.~ Flue |
| 79 | DF | .~.~ Subjacent water arch |
| 80 | DF | .~.~ Subjacent flue |
| 81 | DF | .~.~ Subjacent transverse fire tube |
| * | DD | .~.~ Superjacent feed heater |
| 82 | DF | .~.~.~ In communication |
| 83 | DF | .~.~ Transverse diaphragm |
| * | DD | .~.~ Two diameters |
| 84 | DF | .~.~.~ Great diameter over firebox |
| 85 | DF | .~.~.~ Small diameter over firebox |
| 86 | DF | .~.~.~.~ Water firebox |
| 87 | DF | .~.~ U-coupling |
| 88 | DF | .~.~ Upper drum |
| * | DD | .~.~ Water arch |
| 89 | DF | .~.~.~ Rear of fire tube |
| 90 | DF | .~.~ Water firebox |
| * | DD | .~.~.~ Firebox water heater |
| 91 | DF | .~.~.~.~ Trapped circuit |
| 92 | DF | .~.~.~ Magazine |
| 93 | DF | .~.~.~ Offset |
| 94.1 | DF | .~.~.~.~ Water tube type |
| 95.1 | DF | .~.~.~ Plural with common combustion chamber |
| 95.2 | DF | .~.~.~.~ Multiboilers |
| 96 | DF | .~.~.~ Superposed |
| * | DD | .~.~.~ Water grate |
| 97 | DF | .~.~.~.~ Downdraft |
| 98 | DF | .~.~.~.~ Updraft |
| * | DD | .~.~.~ Water tube |
| 99 | DF | .~.~.~.~ Straddle |
| * | DD | .~.~.~ Water tube type |
| 100 | DF | .~.~.~.~ Interposed flue |
| 101 | DF | .~.~ Water smoke box |
| * | DD | .~.~ Water tube |
| * | DD | .~.~.~ Horizontal |
| 102 | DF | .~.~.~.~ Over bridge wall |
| 103 | DF | .~.~.~ Rear of fire tube |
| * | DD | .~.~.~ Rearwardly declined |
| 104 | DF | .~.~.~.~ Over bridge wall |
| * | DD | .~.~.~ Rearwardly inclined |
| 105 | DF | .~.~.~.~ Over bridge wall |
| 106 | DF | .~.~ Water wall |
| 107 | DF | .~.~.~ Drop water firebox |
| 108 | DF | .~.~.~ Subjacent water tube |
| 109 | DF | .~ Inclined |
| * | DD | .~ Transverse |
| 110 | DF | .~.~ Horizontal boiler |
| 111 | DF | .~.~ Vertical boiler |
| 112 | DF | .~.~.~ Water firebox |
| 113 | DF | .~.~ Water tube |
| 114 | DF | .~ Vertical |
| 116 | DF | .~.~ Central fire dome |
| 117 | DF | .~.~ Central magazine |
| * | DD | .~.~ Circulation tube |
| 118 | DF | .~.~.~ Internal |
| 119 | DF | .~.~ Cylinder |
| 120 | DF | .~.~ Offset firebox |
| 121 | DF | .~.~ Return fire tube |
| 122 | DF | .~.~.~ Water firebox |
| 123 | DF | .~.~ Separate compartment |
| 124 | DF | .~.~ Side magazine |
| 125 | DF | .~.~ Top water chamber |
| 126 | DF | .~.~ Water firebox |
| 127 | DF | .~.~.~ Annular |
| 128 | DF | .~.~.~ Central magazine |
| * | DD | .~.~ Water grate |
| 129 | DF | .~.~.~ Downdraft |
| 130 | DF | .~.~ Water tube |
| 131 | DF | .~.~.~ Internal |
| 132 | DF | .~.~.~ Radial loop |
| 133 | DF | .~.~.~ Spur |
| 115 | DF | .~.~ Fluid fuel |
| 134 | DF | .~ Volute |
| 46 | DF | .~ Magazine |
| * | DD | .~ Flue |
| 47 | DF | .~.~ Horizontal |
| 48 | DF | .~.~ Vertical |
| 45 | DF | .~ Fluid fuel |
| 135.1 | DF | FLUE |
| 135.2 | DF | .~ Alternative stack |
| 135.3 | DF | .~ Sinusoidal flue |
| 136 R | DF | .~ Horizontal |
| 137 | DF | .~.~ Plural |
| 138 | DF | .~.~.~ Water tube |
| 139 | DF | .~.~ Drop water firebox |
| 140.1 | DF | .~.~ Internal water tube |
| 140.2 | DF | .~.~.~ Having water tube in flue |
| * | DD | .~.~.~ Longitudinal |
| 141 | DF | .~.~.~.~ Drop water firebox |
| 142 | DF | .~.~.~ Return fire tube |
| 143 | DF | .~.~.~ Spur |
| 144 | DF | .~.~.~ Subjacent firebox |
| 145 | DF | .~.~.~ Transverse |
| 146 | DF | .~.~.~.~ Drop water firebox |
| 147 | DF | .~.~.~.~ Return fire tube |
| 148 | DF | .~.~.~ Water firebox |
| 149 | DF | .~.~ Return fire tube |
| 150 | DF | .~.~.~ Rear water tube |
| * | DD | .~.~.~ Water smoke box |
| 151 | DF | .~.~.~.~ Separate |
| 152 | DF | .~.~ Water grate in flue |
| 153 | DF | .~.~ Water tube |
| 154 | DF | .~.~.~ Over bridge wall |
| 136 C | DF | .~.~ Horizontal-corrugated or finned |
| 155.1 | DF | .~ Vertical |
| 155.2 | DF | .~.~ With flue baffle |
| 155.3 | DF | .~.~ Having exterior heating flue |
| 155.4 | DF | .~.~ Having corrugated flue |
| 155.5 | DF | .~.~ Having undulating flue |
| 157 | DF | .~.~ Central magazine |
| 158 | DF | .~.~.~ Water jacket |
| * | DD | .~.~ Circulation tube |
| 159 | DF | .~.~.~ Internal |
| 160 | DF | .~.~ Concentric shell |
| 161 | DF | .~.~.~ Fluid fuel |
| 162 | DF | .~.~.~ Central magazine |
| 163 | DF | .~.~ Exterior drum |
| 165 | DF | .~.~ Internal water heater |
| 166.1 | DF | .~.~ With internal water tube |
| 166.2 | DF | .~.~.~ Loop-type tube |
| 168 | DF | .~.~.~ Central magazine |
| 169 | DF | .~.~.~ Coil |
| 170 | DF | .~.~.~.~ Header |
| 171 | DF | .~.~.~ Contracted inlet |
| 172 | DF | .~.~.~ Header |
| 173 | DF | .~.~.~ Horizontal spur |
| 174 | DF | .~.~.~ Internal fire tube |
| 175 | DF | .~.~.~ Offset water firebox |
| 176 | DF | .~.~.~ Transverse |
| 177 | DF | .~.~.~.~ Fluid fuel |
| 178 | DF | .~.~.~ Vertical aligned fire tube |
| 179 | DF | .~.~.~.~ Fluid fuel |
| 180 | DF | .~.~.~.~ Spur water tube |
| 181 | DF | .~.~.~ Vertical spur |
| 167 | DF | .~.~.~ Fluid fuel |
| 182.1 | DF | .~.~ With return fire tube |
| 182.2 | DF | .~.~.~ Having symmetrical arrangement of tubes |
| 182.3 | DF | .~.~.~ Having tubes offset from firebox |
| * | DD | .~.~ Spiral water conduit |
| 183 | DF | .~.~.~ Fluid fuel |
| * | DD | .~.~ Standpipe |
| * | DD | .~.~.~ Water tube |
| 184 | DF | .~.~.~.~ Annular firebox |
| 185 | DF | .~.~.~.~ Loop |
| 186 | DF | .~.~.~.~ Spur |
| 187 | DF | .~.~ Transverse fire tube |
| 164 | DF | .~.~ Insulated outlet flue |
| 156 | DF | .~.~ Fluid fuel |
| * | DD | HORIZONTAL CYLINDER |
| 188 | DF | .~ Drop water baffle |
| * | DD | .~ Offset subjacent firebox |
| 189 | DF | .~.~ Water roof |
| 190 | DF | .~.~ Water tube |
| * | DD | .~ Subjacent fire tube |
| 191 | DF | .~.~ Beyond bridge wall |
| 192 | DF | .~ Water bridge wall |
| 193 | DF | .~ Water firebox |
| 194 | DF | .~.~ Water tube type |
| 195 | DF | .~ Water tube |
| * | DD | .~.~ Feed heater |
| 196 | DF | .~.~.~ Check-valved |
| 197 | DF | .~.~ Lateral-longitudinal |
| 198 | DF | .~.~ Lateral-vertical |
| 199 | DF | .~.~.~ Firebox |
| 200 | DF | .~.~ Over fuel grate |
| 201 | DF | .~.~ Subjacent internal fire tube |
| 202 | DF | .~.~ Trapped circuit |
| * | DD | .~.~ Water grate |
| 203 | DF | .~.~.~ Downdraft |
| 204 | DF | .~.~.~ Intermediate draft |
| 205 | DF | .~.~.~ Multiple series |
| 206 | DF | .~.~.~ Solid and water bar |
| 207 | DF | .~.~.~ Updraft |
| * | DD | PLATE |
| * | DD | .~ Zigzag conduit |
| 208 | DF | .~.~ Fluid fuel |
| 209.1 | DF | SECTIONAL |
| 209.2 | DF | .~ Feeding air |
| 213 | DF | .~ Plural firebox |
| * | DD | .~ Horizontal sections |
| 214 | DF | .~.~ Superimposed |
| 215 | DF | .~.~.~ Central connection |
| 216 | DF | .~.~.~.~ Fluid fuel |
| 217 | DF | .~.~.~.~ Water firebox |
| 218 | DF | .~.~.~ Water firebox |
| 219 | DF | .~.~.~.~ Central magazine |
| * | DD | .~.~.~ Water tube |
| * | DD | .~.~.~.~ Internal fire tube |
| 220 | DF | .~.~.~.~.~ Water firebox |
| * | DD | .~ Vertical sections |
| 221 | DF | .~.~ Annularly positioned |
| 222 | DF | .~.~.~ Central magazine |
| 223 | DF | .~.~ Longitudinally positioned |
| 224 | DF | .~.~.~ Casing |
| 225 R | DF | .~.~ Transversely positioned |
| 226 | DF | .~.~.~ Casing |
| 227 | DF | .~.~.~.~ Divided section |
| 228 | DF | .~.~.~ Divided section |
| 229 | DF | .~.~.~ Water grate |
| 225 A | DF | .~.~.~ Water heater in flue |
| 225 B | DF | .~.~.~ Water heater in boiler |
| 225 F | DF | .~.~.~ Feeding air |
| 230 | DF | .~.~ Two-section |
| 212.1 | DF | .~ With magazine |
| 212.2 | DF | .~.~ With return or alternate flue |
| 211 | DF | .~ Fluid or solid fuel |
| 210 | DF | .~ Fluid fuel |
| 232 | DF | .~ Water grate |
| 231 | DF | .~ Accessories |
| * | DD | TANK |
| 233 | DF | .~ Horizontal |
| 234 | DF | .~ Vertical |
| 235.11 | DF | WATER TUBE |
| 235.12 | DF | .~ Wall structure |
| 235.13 | DF | .~ With fuel burners having posts and tuyeres |
| 235.14 | DF | .~ Tube structure |
| 235.15 | DF | .~ Headers and connections |
| 235.16 | DF | .~ For plural fluids |
| 235.17 | DF | .~ Having baffles |
| 235.18 | DF | .~ Having seals |
| 235.19 | DF | .~ D-type tube |
| 235.21 | DF | .~.~ Multiple D-type tubes |
| 235.22 | DF | .~ Wall loop |
| 235.23 | DF | .~ Having specific tube patterns |
| 235.24 | DF | .~ Screens |
| 235.25 | DF | .~.~ Floor screens |
| 235.26 | DF | .~ Having slag and ash disposal |
| 235.27 | DF | .~ Locomotive-type |
| 235.28 | DF | .~ Having rotary flame |
| 235.29 | DF | .~ Having forced circulation system |
| 235.31 | DF | .~ Having specific intenal drum and head structure |
| 235.32 | DF | .~ With combustion |
| 235.33 | DF | .~ With convection zone regulation |
| 235.34 | DF | .~ With parallel multiple fireboxes |
| 235.35 | DF | .~ With serial multiple fireboxes |
| 238 | DF | .~ Offset firebox |
| 239 | DF | .~ Superimposed firebox |
| 240.1 | DF | .~ Having plural fireboxes |
| 240.2 | DF | .~.~ Series connected |
| 240.3 | DF | .~.~ Parallel connected |
| 241 | DF | .~ Firebox in drum |
| 242 | DF | .~ Capillary |
| 243 | DF | .~.~ Fluid fuel |
| * | DD | .~ Coil or loop |
| 244 | DF | .~.~ Central standpipe |
| 245 | DF | .~.~.~ Fluid fuel |
| 246 | DF | .~.~.~ Annular firebox |
| 247 | DF | .~ Coil |
| * | DD | .~.~ Horizontal |
| 248 | DF | .~.~.~ Fluid fuel |
| 249 | DF | .~.~ Vertical |
| 250 R | DF | .~.~.~ Fluid fuel |
| 250 S | DF | .~.~.~.~ Standpipe |
| 251 | DF | .~.~.~ Central magazine |
| 252 | DF | .~.~.~ Water firebox |
| 253 | DF | .~ Cross |
| 254 | DF | .~.~ Over bridge wall |
| * | DD | .~.~ Over firebox |
| * | DD | .~.~.~ Longitudinal |
| * | DD | .~.~.~.~ Header |
| 255 | DF | .~.~.~.~.~ Drum |
| * | DD | .~.~.~ Transverse |
| * | DD | .~.~.~.~ Header |
| 256 | DF | .~.~.~.~.~ Drum |
| * | DD | .~.~ Transverse |
| * | DD | .~.~.~ Header |
| 257 | DF | .~.~.~.~ Drum |
| 258 | DF | .~ Downflow |
| 259 | DF | .~ Drum type |
| 260 | DF | .~ Flat |
| 261 | DF | .~.~ Volute |
| 262 | DF | .~ Horizontal |
| 263 | DF | .~.~ Over bridge wall |
| 264 | DF | .~.~ Over firebox |
| 265 | DF | .~ Inclined |
| 266 | DF | .~ Internal fire tube |
| 267 | DF | .~.~ Horizontal |
| 268 | DF | .~.~ Inclined |
| 269 | DF | .~.~ Plural fire tube |
| 270 | DF | .~.~ Straddle |
| 271 | DF | .~.~ Vertical |
| 272 | DF | .~.~.~ Central magazine |
| 273 | DF | .~ Longitudinal upper drum |
| 274 | DF | .~.~ Fluid fuel |
| 275 | DF | .~ Loop |
| 276 | DF | .~.~ Firebox enclosing |
| 277 | DF | .~.~ Over bridge wall |
| * | DD | .~.~ Over firebox |
| 278 | DF | .~.~.~ Cross |
| 279 | DF | .~.~.~ Horizontal |
| * | DD | .~.~.~ Rear of bridge wall |
| 280 | DF | .~.~.~.~ Bridge wall header |
| 281 | DF | .~.~.~ Standpipe |
| 282 | DF | .~.~.~ Vertical |
| 283 | DF | .~.~.~.~ Fluid fuel |
| * | DD | .~ Over bridge wall |
| 284 | DF | .~.~ Headers at right angles |
| 285 | DF | .~.~ Transverse water baffle |
| * | DD | .~.~ Water grate |
| 286 | DF | .~.~.~ Downdraft |
| 287 | DF | .~.~.~ Intermediate draft |
| * | DD | .~ Over firebox |
| 288 | DF | .~.~ Headers at right angles |
| * | DD | .~.~ Water grate |
| 289 | DF | .~.~.~ Updraft |
| * | DD | .~ Rearwardly declined |
| * | DD | .~.~ Over bridge wall |
| 290 | DF | .~.~.~ Front and rear header |
| 291 | DF | .~.~.~.~ Horizontal-longitudinal drum |
| 292 | DF | .~.~.~.~.~ Firebox tube |
| 293 | DF | .~.~.~.~.~ Longitudinal water baffle |
| 294 | DF | .~.~.~.~.~ Water wall |
| 295 | DF | .~.~.~.~ Internal water tube |
| 296 | DF | .~.~.~.~ Longitudinal-declined drum |
| 297 | DF | .~.~.~.~ Transverse drum |
| * | DD | .~.~ Over firebox |
| * | DD | .~.~.~ Front and rear header |
| 298 | DF | .~.~.~.~ Horizontal-longitudinal drum |
| 299 | DF | .~.~.~.~ Transverse drum |
| 300 | DF | .~.~.~.~ Tubes beyond side wall |
| * | DD | .~.~ Plural upper transverse drum |
| 301 | DF | .~.~.~ Plural lower transverse drum |
| 302 | DF | .~.~.~ Single lower transverse drum |
| * | DD | .~ Rearwardly inclined |
| * | DD | .~.~ Over firebox |
| * | DD | .~.~.~ Front and rear header |
| 303 | DF | .~.~.~.~ Transverse drum |
| * | DD | .~ Separate banks |
| 304 | DF | .~.~ Opposite fireboxes |
| 305 | DF | .~ Spur |
| 306 | DF | .~.~ Bridge wall header |
| 307 | DF | .~.~ Central standpipe |
| 308 | DF | .~.~.~ Fluid fuel |
| 309 | DF | .~.~.~ Annular firebox |
| 310 | DF | .~.~.~ Central magazine |
| 311 | DF | .~.~ Cross |
| 312 | DF | .~.~ Horizontal-longitudinal drum |
| 313 | DF | .~.~ Over bridge wall |
| * | DD | .~.~ Over firebox |
| 314 | DF | .~.~.~ Central header |
| 315 | DF | .~.~.~ Declined |
| 316 | DF | .~.~.~ Horizontal |
| 317 | DF | .~.~ Straddle |
| 318 | DF | .~.~ Vertical |
| 319 | DF | .~.~.~ Fluid fuel |
| 320 | DF | .~.~.~ Central magazine |
| 321 | DF | .~ Standpipe |
| 322 | DF | .~.~ Fluid fuel |
| 323 | DF | .~.~ Annular firebox |
| 324 | DF | .~ Straddle |
| * | DD | .~.~ Plural upper drum |
| 325 | DF | .~.~.~ Plural lower drum |
| 326 | DF | .~.~.~.~ Cross |
| * | DD | .~.~ Single upper drum |
| 327 | DF | .~.~.~ Plural lower drum |
| 328 | DF | .~.~.~.~ Fluid fuel |
| 329 | DF | .~.~.~.~ Cross |
| 330 | DF | .~.~.~.~ Plural firebox |
| 331 | DF | .~ Transverse horizontal drum |
| 332 | DF | .~ Vertical |
| 333 | DF | .~.~ Fluid fuel |
| 334 | DF | .~.~ Side magazine |
| 335 | DF | .~.~ Annular firebox |
| 336 | DF | .~.~ Offset firebox |
| 337 | DF | .~.~.~ Elevated |
| * | DD | .~.~ Annular lower drum |
| 338 | DF | .~.~.~ Annular upper drum |
| 339 | DF | .~.~.~.~ Central magazine |
| 340 | DF | .~.~.~.~ Tubes over firebox |
| 341 | DF | .~.~.~ Fire tube upper drum |
| 342 | DF | .~.~.~ Spur tube upper drum |
| 343 | DF | .~.~.~ Upper drum |
| 344 | DF | .~.~.~.~ Central magazine |
| 345 | DF | .~.~ Beyond bridge wall |
| 346 | DF | .~.~.~ Gas return |
| * | DD | .~.~.~ Longitudinal upper drum |
| 347 | DF | .~.~.~.~ Longitudinal lower drum |
| * | DD | .~.~ Internal fire tube |
| 348 | DF | .~.~.~ Fluid fuel |
| 349 | DF | .~.~ Over firebox |
| 350 | DF | .~.~.~ Gas return |
| * | DD | .~.~ Plural upper longitudinal drum |
| 351 | DF | .~.~.~ Plural lower longitudinal drum |
| * | DD | .~.~ Plural upper transverse drum |
| * | DD | .~.~.~ Plural lower transverse drum |
| 352 | DF | .~.~.~.~ Offset firebox |
| 353 | DF | .~ Water grate |
| 354 | DF | .~.~ Downdraft |
| 355 | DF | .~ Zigzag |
| 356 | DF | .~.~ Fluid fuel |
| * | DD | .~.~ Over bridge wall |
| 357 | DF | .~.~.~ Longitudinal drum |
| 358 | DF | .~.~.~ Transverse drum |
| 359 | DF | .~.~ Over firebox |
| 237 | DF | .~ Magazine |
| 236 | DF | .~ Fluid fuel |
| * | DD | .~ Headers |
| 360 | DF | .~.~ Closures and couplings |
| 361 | DF | .~.~.~ Cleaning |
| 362 | DF | .~.~.~ Concentric tube |
| 363 | DF | .~.~.~ Drum |
| 364 | DF | .~.~.~ Tube closures |
| 365 | DF | .~ Drums and couplings |
| 366 | DF | WICK |
| 367.1 | DF | HEAT TRANSMITTER |
| 367.2 | DF | .~ Double immersed heat transmitters |
| 367.3 | DF | .~ Corrugated and finned heat transmitters |
| 367.4 | DF | .~ Pebble furnaces |
| 368 | DF | WATER FIREBOX |
| 369 | DF | .~ Mud ring |
| 370 | DF | .~ Plural |
| 371 | DF | WATER GRATE |
| * | DD | .~ Plural firebox |
| * | DD | .~.~ Superimposed |
| * | DD | .~.~.~ Water grate |
| 372 | DF | .~.~.~.~ Updraft |
| 373 | DF | .~ Cage |
| 374 | DF | .~ Grate structure |
| 375 | DF | .~.~ Solid and water bar |
| 376 | DF | .~ Progressive feed |
| * | DD | .~ Water firebox |
| * | DD | .~.~ Solid and water bar |
| 377 | DF | .~.~.~ Updraft |
| 378 | DF | .~.~ Updraft |
| 21 | DF | CHEMICAL |
| 22 | DF | FLUID AND SOLID FUEL |
| 23 | DF | FLUID FUEL |
| 24 | DF | .~ Explosion |
| * | DD | .~ Plural burner |
| 25 | DF | .~.~ Superimposed |
| 26 | DF | FRICTION GENERATOR |
| * | DD | NONCOMBUSTIBLE HEATER |
| 27 | DF | .~ Surface |
| 28 | DF | .~ Water in contact |
| 379 | DF | CLEANING |
| 380 | DF | .~ Agitating circulator |
| * | DD | .~ Blow off |
| 381 | DF | .~.~ Bottom and surface |
| 382 | DF | .~.~ Bottom |
| 383 | DF | .~.~.~ Internal conduit |
| 384 | DF | .~.~.~.~ Ejector |
| 385 | DF | .~.~.~.~ Mud ring |
| 386 | DF | .~.~.~.~ Pan |
| 387 | DF | .~.~.~.~ Scraper |
| 388 | DF | .~.~.~.~ Valved |
| 389 | DF | .~.~ Surface exit |
| 390 | DF | .~ Fluid jet |
| 391 | DF | .~.~ Horizontal fire tube boiler |
| 392 | DF | .~.~ Water tube boiler |
| 393 | DF | .~ Mud drum |
| 394 | DF | .~ Pans |
| 395 | DF | .~ Sandblast |
| 396 | DF | .~ Systems |
| 397 | DF | .~ Trapped circuit |
| 398 | DF | .~.~ Feeding water |
| 399 | DF | .~.~ Surface and bottom exit |
| 400 | DF | .~.~ Surface exit |
| 401 | DF | .~.~.~ Chemical feeder |
| 402 | DF | .~.~.~ Circulating pump |
| 403 | DF | .~.~.~ Feed heater |
| 404 | DF | .~.~.~ Steam injector |
| 405 | DF | .~ Wash-out nozzle |
| 406.1 | DF | CIRCULATION |
| 406.2 | DF | .~ Having anticavitation devices |
| 406.3 | DF | .~ Having restrictors and orifices |
| 406.4 | DF | .~ Once through |
| 406.5 | DF | .~ With start-up operations |
| 407 | DF | .~ Injector |
| 408.1 | DF | .~ Having internal conduit |
| 408.2 | DF | .~.~ With internal geyser tube |
| 409 | DF | .~.~ Horizontal flue boiler |
| 410 | DF | .~.~.~ Return fire tube |
| * | DD | .~ Mechanical |
| 411 | DF | .~.~ Internal |
| 412 | DF | FEED HEATERS |
| 413 | DF | .~ Ash pan |
| * | DD | .~ Boiler circuit |
| 414 | DF | .~.~ Feed-injected |
| * | DD | .~ Circulatioon |
| * | DD | .~.~ Surface exit |
| * | DD | .~.~.~ Mechanical pump |
| 415 | DF | .~.~.~.~ Feed-injected |
| 417 | DF | .~ Drip plate in boiler |
| * | DD | .~ Fire-engine boiler |
| * | DD | .~.~ Auxiliary |
| 418 | DF | .~.~.~ Attached |
| 419 | DF | .~.~.~ Detachable |
| 420 | DF | .~ Furnace gases |
| 421 | DF | .~ Offtake flue |
| 422 | DF | .~ Furnace gases and steam |
| * | DD | .~ Horizontal fire tube boiler |
| 423 | DF | .~.~ Smoke box |
| 424 | DF | .~.~.~ Exhaust pipe |
| 425 | DF | .~.~.~ Furnace gases and steam |
| 426 | DF | .~.~.~ Water tube |
| 427 | DF | .~.~ Smoke chamber |
| 428 | DF | .~ Internal conduit |
| 429 | DF | .~.~ Automatic sediment valve |
| 430 | DF | .~.~ Blow-off delivery |
| 431 | DF | .~.~ Filter in boiler |
| 432 | DF | .~.~ Furnace gases |
| 433 | DF | .~.~ Trap outside boiler |
| 434 | DF | .~ Locomotive tender |
| 435 | DF | .~ Pan in steam space |
| 436 | DF | .~.~ Spray |
| 437 | DF | .~ Safety valve |
| 438 | DF | .~ Spray to steam space |
| 439 | DF | .~ Stack |
| 441 | DF | .~ Steam |
| 442 | DF | .~.~ Injected |
| * | DD | .~.~.~ Superposed |
| 443 | DF | .~.~.~.~ Open to steam space |
| 444 | DF | .~ Water tube boiler |
| * | DD | REGULATION |
| * | DD | .~ Fuel and water |
| 446 | DF | .~.~ Fluid fuel |
| 447 | DF | .~.~.~ Cutoff |
| * | DD | .~.~ Automatic control |
| 449 | DF | .~.~.~ Solid fuel |
| 450 | DF | .~ Suspended boiler |
| 448.1 | DF | AUTOMATIC CONTROL OF FLUID FUEL AND WATER |
| 448.2 | DF | .~ Having fuel or feed bypass |
| 448.3 | DF | .~ Multiple boiler regulation |
| 448.4 | DF | .~ Once through |
| 451 R | DF | FEEDERS |
| 451.1 | DF | .~ Automatic |
| 451.1 | DF | .~.~ Thermally controlled |
| 451.2 | DF | .~.~.~ Pressure-operated valve |
| 452 | DF | .~ Boiler pressure |
| * | DD | .~ Gravity |
| 456 | DF | .~.~ Automatic |
| 457 | DF | .~.~.~ Heater |
| 458 | DF | .~.~ Heater |
| 451 S | DF | .~ Once through |
| 459 | DF | STEAM TREATMENT |
| 460 | DF | .~ Boilers with superheaters |
| * | DD | .~ Fire tube boiler |
| * | DD | .~.~ Horizontal |
| 461 | DF | .~.~.~ Superheater |
| * | DD | .~.~.~.~ In fire tube |
| 462 | DF | .~.~.~.~.~ From smoke box |
| * | DD | .~.~.~.~ Interior steam space |
| 463 | DF | .~.~.~.~.~ Internal fire tube |
| * | DD | .~.~.~.~ Smoke box |
| 464 | DF | .~.~.~.~.~ Fire tube |
| 465 | DF | .~.~.~.~.~ Steam tube |
| 466 | DF | .~.~ Superheater and feed heater |
| * | DD | .~.~ Vertical |
| 467 | DF | .~.~.~ Superheater |
| * | DD | .~ Flue boiler |
| * | DD | .~.~ Vertical |
| * | DD | .~.~.~ Internal water tube |
| 468 | DF | .~.~.~.~ Superheater |
| * | DD | .~ Horizontal boiler |
| * | DD | .~.~ Superheater |
| 469 | DF | .~.~.~ Rear of firebox |
| 470 | DF | .~.~.~ Waste-heat flue |
| * | DD | .~ Water tube boiler |
| * | DD | .~.~ Declined over bridge wall |
| * | DD | .~.~.~ Front and rear header |
| * | DD | .~.~.~.~ Declined drum |
| 471 | DF | .~.~.~.~.~ Superheater |
| * | DD | .~.~.~.~ Longitudinal drum |
| 472 | DF | .~.~.~.~.~ Superheater |
| * | DD | .~.~ Longitudinal drum |
| 473 | DF | .~.~.~ Superheater |
| * | DD | .~.~ Over bridge wall |
| 474 | DF | .~.~.~ Superheater |
| * | DD | .~.~ Standpipe |
| * | DD | .~.~.~ Spur tube |
| 475 | DF | .~.~.~.~ Superheater |
| * | DD | .~.~ Transverse drum |
| 478 | DF | .~.~.~ Superheater |
| 477 | DF | .~.~ Superheater and feed heater |
| 476 | DF | .~.~ Superheater |
| * | DD | .~ Superheater |
| 480 | DF | .~.~ Damper-controlled |
| 481 | DF | .~.~ Firebox |
| 482 | DF | .~.~ Fire tube in steam space |
| 483 | DF | .~.~ Indirectly heated |
| 484 | DF | .~.~ Separate charges |
| 485 | DF | .~.~ Separate furnace |
| 486 | DF | .~.~ Steam dome |
| 487 | DF | .~.~ Water-injected |
| 479.1 | DF | .~ Automatic heat regulation of superheater |
| 479.2 | DF | .~.~ Having gas recirculation |
| 479.3 | DF | .~.~ Having flame positioning |
| 479.4 | DF | .~.~ With variable firing |
| 479.5 | DF | .~.~ Having dampers |
| 479.6 | DF | .~.~ Plural furnaces |
| 479.7 | DF | .~.~ Once through |
| * | DD | SEPARATORS |
| 488 | DF | .~ Boiler circulation |
| 489 | DF | .~ Boiler return |
| 490 | DF | .~ For tilting boilers |
| 491 | DF | .~ Interior of boilers |
| 492 | DF | .~ Steam dome |
| 493 | DF | BRACES AND STAYS |
| 494 | DF | CASINGS |
| 495 | DF | CROWN SHEETS PROTECTING |
| 496 | DF | CROWN SHEETS AND STAYS |
| 497 | DF | FRONTS |
| 498 | DF | .~ Doors |
| 499 | DF | .~ Mouths |
| 500 | DF | .~.~ Water firebox |
| 501 | DF | FLUID-DISPLACER |
| 502 | DF | .~ Fluid fuel |
| 503 | DF | FUEL BAFFLES |
| 504 | DF | SAFETY DEVICES |
| 504.1 | DF | .~ Fusible control |
| 504.2 | DF | .~ Alarms or indicators |
| 504.3 | DF | .~ Fire extinguishers |
| 504.3 | DF | .~.~ Fusible control |
| 505 | DF | .~.~ Float-controlled |
| 506 | DF | .~.~ Pressure-controlled |
| 507 | DF | .~ Self-closing valve |
| 508 | DF | STEAM DOMES |
| 509 | DF | SUBMERGED STEAM CHAMBER |
| 510 | DF | SUPPORTS |
| 511 | DF | TUBES AND CONNECTIONS |
| 512 | DF | TUBE SHEETS |
| ****************************** | ||
| DIGESTS | ||
| ****************************** | ||
| DIG 1 | DD | Air heater |
| DIG 2 | DD | Air heater - indirectly heated |
| DIG 3 | DD | Gas flow baffles |
| DIG 4 | DD | Once through boilers |
| DIG 5 | DD | Critical pressure |
| DIG 6 | DD | Damper-directed radiation |
| DIG 7 | DD | Feeding air |
| DIG 10 | DD | Portable units |
| DIG 11 | DD | Removable steam-heating elements |
| DIG 13 | DD | Tubes - composition and protection |
| DIG 14 | DD | Tube replacement |
| DIG 15 | DD | Valves |
| DIG 16 | DD | Welding |