| Class 122 | LIQUID HEATERS AND VAPORIZERS |
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![[List of Pre Grant Publications for class 122 subclass 1R]](../as.gif) | ![[List of Patents for class 122 subclass 1R]](../ps.gif) | 1R | PLANTS |
| | 4R | MISCELLANEOUS |
| | 5 | GAS-PRODUCER |
| | 5.51 | AIR-INJECTED |
| | 6R | INDUSTRIAL |
| | 6.5 |  Port |
| | 6.6 | Tuyeres |
| | 7R | Waste heat |
| | 8 | Water firebox |
| | 6A | Water-cooled walls |
| | 6B | Bosh plates |
| | 6C | Skew arch coolers |
| | 10 | FOR FLUID FUEL BURNER |
| | 11 | ROTARY |
| | 12 | ROTATABLY SUPPORTED |
| | 13.01 | STAND BOILER (E.G., WATER HEATER, ETC.) |
| | 13.3 | And delivery means to dispensing feature |
| | 14.1 | And condition responsive feature |
| | 14.2 |  Controls burner |
| | 14.21 |  By other than temperature of water |
| | 14.22 | By temperature of water in a water containing chamber or external tank |
| | 14.3 | Having water flow control feature |
| | 15.1 | Heated by liquid or steam (e.g., indirect heating, etc.) |
| | 16.1 | Solid fuel burner |
| | 17.1 | Fluid fuel burner |
| | 17.2 | Liquid fuel burner |
| | 18.1 | Having heat exchange feature |
| | 18.2 | Preheater |
| | 18.3 | Fire tube or flue surrounded by water containing chamber |
| | 18.4 | Water tube surrounded by burned fuel |
| | 18.5 | And external water tank |
| | 19.1 | Water containing chamber or external tank having circulation feature within |
| | 19.2 | And casing feature for stand boiler or external water tank therefor |
| | 20R | SUBSIDIARY |
| | 29 | ANNULAR FIREBOX |
| | 30 | MAGAZINE |
| INDIRECTLY HEATED |
| | 31.1 | INDIRECTLY HEATED SEPARATE INJECTED FLUID |
| | 35 | ACCUMULATOR |
| | 36 | AUXILIARY STEAM HEATER |
| | 37 | COMPARTMENT |
| | 39 | FILM |
| | 40 | FLASHER |
| | 42 | FIRE AND WATER TUBE |
| | 44.1 | FIRE TUBE |
| | 44.2 | With baffle in flue |
| | 49 | Horizontal and vertical |
| Horizontal or inclined |
| | 51 | Horizontal |
| | 52 | Plural |
| Central firebox |
| | 55 | Cylinder |
| Depending fire tube |
| Double water firebox |
| | 58R | Drop water firebox |
| | 59 | Circulation conduit |
| Double |
| | 61 | Drop water baffle |
| | 62 | Front and rear water baffle |
| | 63 | Front water baffle |
| | 64 | Interposed combustion chamber |
| | 65 | Rear water baffle |
| | 66 | Water coking chamber |
| Water grate |
| | 68 | Water tube |
| | 58FB | Fire box construction |
| | 72 | Projecting into firebox |
| Return and reverse |
| | 75 | Return fire tube |
| | 79 | Subjacent water arch |
| | 80 | Subjacent flue |
| | 81 | Subjacent transverse fire tube |
| Superjacent feed heater |
| | 83 | Transverse diaphragm |
| Two diameters |
| | 87 | U-coupling |
| | 88 | Upper drum |
| Water arch |
| | 90 | Water firebox |
| Firebox water heater |
| | 92 | Magazine |
| | 93 | Offset |
| | 95.1 | Plural with common combustion chamber |
| | 96 | Superposed |
| Water grate |
| Water tube |
| Water tube type |
| | 101 | Water smoke box |
| Water tube |
| | 106 | Water wall |
| | 109 | Inclined |
| Transverse |
| | 114 | Vertical |
| | 116 | Central fire dome |
| | 117 | Central magazine |
| Circulation tube |
| | 119 | Cylinder |
| | 120 | Offset firebox |
| | 121 | Return fire tube |
| | 123 | Separate compartment |
| | 124 | Side magazine |
| | 125 | Top water chamber |
| | 126 | Water firebox |
| Water grate |
| | 130 | Water tube |
| | 115 | Fluid fuel |
| | 134 | Volute |
| | 46 | Magazine |
| Flue |
| | 45 | Fluid fuel |
| | 135.1 | FLUE |
| | 135.2 | Alternative stack |
| | 135.3 | Sinusoidal flue |
| | 136R | Horizontal |
| | 137 | Plural |
| | 139 | Drop water firebox |
| | 140.1 | Internal water tube |
| | 140.2 | Having water tube in flue |
| Longitudinal |
| | 142 | Return fire tube |
| | 143 | Spur |
| | 144 | Subjacent firebox |
| | 145 | Transverse |
| | 148 | Water firebox |
| | 149 | Return fire tube |
| | 152 | Water grate in flue |
| | 153 | Water tube |
| | 136C | Horizontal-corrugated or finned |
| | 155.1 | Vertical |
| | 155.2 | With flue baffle |
| | 155.3 | Having exterior heating flue |
| | 155.4 | Having corrugated flue |
| | 155.5 | Having undulating flue |
| | 157 | Central magazine |
| Circulation tube |
| | 160 | Concentric shell |
| | 163 | Exterior drum |
| | 165 | Internal water heater |
| | 166.1 | With internal water tube |
| | 166.2 | Loop-type tube |
| | 168 | Central magazine |
| | 169 | Coil |
| | 171 | Contracted inlet |
| | 172 | Header |
| | 173 | Horizontal spur |
| | 174 | Internal fire tube |
| | 175 | Offset water firebox |
| | 176 | Transverse |
| | 178 | Vertical aligned fire tube |
| | 181 | Vertical spur |
| | 167 | Fluid fuel |
| | 182.1 | With return fire tube |
| Spiral water conduit |
| Standpipe |
| | 187 | Transverse fire tube |
| | 164 | Insulated outlet flue |
| | 156 | Fluid fuel |
| HORIZONTAL CYLINDER |
| | 188 | Drop water baffle |
| Offset subjacent firebox |
| Subjacent fire tube |
| | 192 | Water bridge wall |
| | 193 | Water firebox |
| | 195 | Water tube |
| PLATE |
| | 209.1 | SECTIONAL |
| | 209.2 | Feeding air |
| | 213 | Plural firebox |
| Horizontal sections |
| | 214 | Superimposed |
| Vertical sections |
| | 221 | Annularly positioned |
| | 223 | Longitudinally positioned |
| | 225R | Transversely positioned |
| | 226 | Casing |
| | 228 | Divided section |
| | 229 | Water grate |
| | 225A | Water heater in flue |
| | 225B | Water heater in boiler |
| | 225F | Feeding air |
| | 230 | Two-section |
| | 212.1 | With magazine |
| | 211 | Fluid or solid fuel |
| | 210 | Fluid fuel |
| | 232 | Water grate |
| | 231 | Accessories |
| TANK |
| | 235.11 | WATER TUBE |
| | 235.12 | Wall structure |
| | 235.13 | With fuel burners having posts and tuyeres |
| | 235.14 | Tube structure |
| | 235.15 | Headers and connections |
| | 235.16 | For plural fluids |
| | 235.17 | Having baffles |
| | 235.18 | Having seals |
| | 235.19 | D-type tube |
| | 235.22 | Wall loop |
| | 235.23 | Having specific tube patterns |
| | 235.24 | Screens |
| | 235.26 | Having slag and ash disposal |
| | 235.27 | Locomotive-type |
| | 235.28 | Having rotary flame |
| | 235.29 | Having forced circulation system |
| | 235.31 | Having specific intenal drum and head structure |
| | 235.32 | With combustion |
| | 235.33 | With convection zone regulation |
| | 235.34 | With parallel multiple fireboxes |
| | 235.35 | With serial multiple fireboxes |
| | 238 | Offset firebox |
| | 239 | Superimposed firebox |
| | 240.1 | Having plural fireboxes |
| | 241 | Firebox in drum |
| | 242 | Capillary |
| Coil or loop |
| | 247 | Coil |
| | 253 | Cross |
| | 258 | Downflow |
| | 259 | Drum type |
| | 260 | Flat |
| | 262 | Horizontal |
| | 265 | Inclined |
| | 266 | Internal fire tube |
| | 273 | Longitudinal upper drum |
| | 275 | Loop |
| | 276 | Firebox enclosing |
| | 277 | Over bridge wall |
| Over firebox |
| Over bridge wall |
| Over firebox |
| Rearwardly declined |
| Over bridge wall |
| Over firebox |
| Plural upper transverse drum |
| Rearwardly inclined |
| Separate banks |
| | 305 | Spur |
| | 306 | Bridge wall header |
| | 307 | Central standpipe |
| | 311 | Cross |
| | 312 | Horizontal-longitudinal drum |
| | 313 | Over bridge wall |
| Over firebox |
| | 317 | Straddle |
| | 318 | Vertical |
| | 321 | Standpipe |
| | 324 | Straddle |
| | 331 | Transverse horizontal drum |
| | 332 | Vertical |
| | 333 | Fluid fuel |
| | 334 | Side magazine |
| | 335 | Annular firebox |
| | 336 | Offset firebox |
| Annular lower drum |
| | 345 | Beyond bridge wall |
| Internal fire tube |
| | 349 | Over firebox |
| Plural upper longitudinal drum |
| Plural upper transverse drum |
| | 353 | Water grate |
| | 355 | Zigzag |
| | 237 | Magazine |
| | 236 | Fluid fuel |
| Headers |
| | 365 | Drums and couplings |
| | 366 | WICK |
| | 367.1 | HEAT TRANSMITTER |
| | 367.2 | Double immersed heat transmitters |
| | 367.3 | Corrugated and finned heat transmitters |
| | 367.4 | Pebble furnaces |
| | 368 | WATER FIREBOX |
| | 371 | WATER GRATE |
| | 21 | CHEMICAL |
| | 22 | FLUID AND SOLID FUEL |
| | 23 | FLUID FUEL |
| | 26 | FRICTION GENERATOR |
| NONCOMBUSTIBLE HEATER |
| | 379 | CLEANING |
| | 380 | Agitating circulator |
| Blow off |
| | 390 | Fluid jet |
| | 393 | Mud drum |
| | 394 | Pans |
| | 395 | Sandblast |
| | 396 | Systems |
| | 397 | Trapped circuit |
| | 405 | Wash-out nozzle |
| | 406.1 | CIRCULATION |
| | 406.2 | Having anticavitation devices |
| | 406.3 | Having restrictors and orifices |
| | 406.4 | Once through |
| | 406.5 | With start-up operations |
| | 407 | Injector |
| | 408.1 | Having internal conduit |
| Mechanical |
| | 412 | FEED HEATERS |
| | 413 | Ash pan |
| Boiler circuit |
| Circulatioon |
| | 417 | Drip plate in boiler |
| Fire-engine boiler |
| | 420 | Furnace gases |
| | 421 | Offtake flue |
| | 422 | Furnace gases and steam |
| Horizontal fire tube boiler |
| | 428 | Internal conduit |
| | 429 | Automatic sediment valve |
| | 430 | Blow-off delivery |
| | 431 | Filter in boiler |
| | 432 | Furnace gases |
| | 433 | Trap outside boiler |
| | 434 | Locomotive tender |
| | 435 | Pan in steam space |
| | 437 | Safety valve |
| | 438 | Spray to steam space |
| | 439 | Stack |
| | 441 | Steam |
| | 444 | Water tube boiler |
| REGULATION |
| | 448.1 | AUTOMATIC CONTROL OF FLUID FUEL AND WATER |
| | 451R | FEEDERS |
| | 459 | STEAM TREATMENT |
| | 460 | Boilers with superheaters |
| Fire tube boiler |
| Horizontal |
| | 461 | Superheater |
| | 466 | Superheater and feed heater |
| Vertical |
| Flue boiler |
| Horizontal boiler |
| Water tube boiler |
| Declined over bridge wall |
| Longitudinal drum |
| Over bridge wall |
| Standpipe |
| Transverse drum |
| | 477 | Superheater and feed heater |
| | 476 | Superheater |
| Superheater |
| | 480 | Damper-controlled |
| | 481 | Firebox |
| | 482 | Fire tube in steam space |
| | 483 | Indirectly heated |
| | 484 | Separate charges |
| | 485 | Separate furnace |
| | 486 | Steam dome |
| | 487 | Water-injected |
| | 479.1 | Automatic heat regulation of superheater |
| SEPARATORS |
| | 488 | Boiler circulation |
| | 489 | Boiler return |
| | 490 | For tilting boilers |
| | 491 | Interior of boilers |
| | 492 | Steam dome |
| | 493 | BRACES AND STAYS |
| | 494 | CASINGS |
| | 495 | CROWN SHEETS PROTECTING |
| | 496 | CROWN SHEETS AND STAYS |
| | 497 | FRONTS |
| | 501 | FLUID-DISPLACER |
| | 503 | FUEL BAFFLES |
| | 504 | SAFETY DEVICES |
| | 508 | STEAM DOMES |
| | 509 | SUBMERGED STEAM CHAMBER |
| | 510 | SUPPORTS |
| | 511 | TUBES AND CONNECTIONS |
| | 512 | TUBE SHEETS |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
| FOR100 | STAND BOILER (122/13.1) |
| FOR101 | Electric (122/13.2) |
| Fire tube and water tube (122/unnumbered) |
| Fire tube (122/unnumbered) |
| Water tube (122/unnumbered) |
| FOR106 | Fluid fuel (122/14) |
| FOR107 | Solid fuel (122/15) |
| DIGESTS | ||
| | DIG1 | AIR HEATER |
| | DIG2 | AIR HEATER - INDIRECTLY HEATED |
| | DIG3 | GAS FLOW BAFFLES |
| | DIG4 | ONCE THROUGH BOILERS |
| | DIG5 | CRITICAL PRESSURE |
| | DIG6 | DAMPER-DIRECTED RADIATION |
| | DIG7 | FEEDING AIR |
| | DIG10 | PORTABLE UNITS |
| | DIG11 | REMOVABLE STEAM-HEATING ELEMENTS |
| | DIG13 | TUBES - COMPOSITION AND PROTECTION |
| | DIG14 | TUBE REPLACEMENT |
| | DIG15 | VALVES |
| | DIG16 | WELDING |