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3 . (1 indent ) Motor vehicle
1A . (1 indent ) Air heaters
1B . (1 indent ) Once through
1C . (1 indent ) Feed water heaters
4A . (1 indent ) Electric boiler
4C . (1 indent ) Water-cooled stoker
4D . (1 indent ) Catalyst
5.52 . (1 indent ) Combustion gas and vapor contact
6.6 . (1 indent ) Tuyeres
7R . (1 indent ) Waste heat
7A .. (2 indent ) Steel converter
7B .. (2 indent ) Additional burner
7C .. (2 indent ) Waste sulfite
7D .. (2 indent ) Carbon monoxide
8 . (1 indent ) Water firebox
9 .. (2 indent ) Water tube type
6A . (1 indent ) Water-cooled walls
6B . (1 indent ) Bosh plates
6C . (1 indent ) Skew arch coolers
13.01 STAND BOILER (E.G., WATER HEATER, ETC.)
13.3 . (1 indent ) And delivery means to dispensing feature
14.1 . (1 indent ) And condition responsive feature
14.2 .. (2 indent ) Controls burner
14.21 ... (3 indent ) By other than temperature of water
14.22 ... (3 indent ) By temperature of water in a water containing chamber or external tank
14.3 .. (2 indent ) Having water flow control feature
14.31 ... (3 indent ) Using valve actuated by flow or pressure (e.g., check valve, etc.)
15.1 . (1 indent ) Heated by liquid or steam (e.g., indirect heating, etc.)
16.1 . (1 indent ) Solid fuel burner
17.1 . (1 indent ) Fluid fuel burner
17.2 .. (2 indent ) Liquid fuel burner
18.1 .. (2 indent ) Having heat exchange feature
18.2 ... (3 indent ) Preheater
18.3 ... (3 indent ) Fire tube or flue surrounded by water containing chamber
18.31 .... (4 indent ) Penetrates one side of water chamber to another
18.4 ... (3 indent ) Water tube surrounded by burned fuel
18.5 .. (2 indent ) And external water tank
19.1 . (1 indent ) Water containing chamber or external tank having circulation feature within
19.2 . (1 indent ) And casing feature for stand boiler or external water tank therefor
20A . (1 indent ) Subsidiary-heater firebox
20B . (1 indent ) Subsidiary-heater offtake flue
. (1 indent ) Separate fluid
32 .. (2 indent ) Surface
33 ... (3 indent ) Furnace
34 ... (3 indent ) Separator
31.1 INDIRECTLY HEATED SEPARATE INJECTED FLUID
31.2 . (1 indent ) Submerged flame
36 AUXILIARY STEAM HEATER
38 .. (2 indent ) Draft regulator
41 . (1 indent ) Fluid fuel
43 . (1 indent ) Fluid fuel
44.2 . (1 indent ) With baffle in flue
49 . (1 indent ) Horizontal and vertical
. (1 indent ) Horizontal or inclined
.. (2 indent ) Water firebox
51 . (1 indent ) Horizontal
53 ... (3 indent ) Water tube
.. (2 indent ) Central firebox
54 ... (3 indent ) Double outlet
55 .. (2 indent ) Cylinder
.. (2 indent ) Depending fire tube
56 ... (3 indent ) Rear of bridge wall
.. (2 indent ) Double water firebox
57 ... (3 indent ) Alternate smoke return
58R .. (2 indent ) Drop water firebox
59 ... (3 indent ) Circulation conduit
60 .... (4 indent ) Alternate smoke return
61 ... (3 indent ) Drop water baffle
62 ... (3 indent ) Front and rear water baffle
63 ... (3 indent ) Front water baffle
64 ... (3 indent ) Interposed combustion chamber
65 ... (3 indent ) Rear water baffle
66 ... (3 indent ) Water coking chamber
... (3 indent ) Water grate
67 .... (4 indent ) Intermediate draft
68 ... (3 indent ) Water tube
.... (4 indent ) Feed heater
69 .... • (5 indent ) Check-valved
70 .... (4 indent ) Feeding air
71 .... (4 indent ) Solid baffle
58FB ... (3 indent ) Fire box construction
72 .. (2 indent ) Projecting into firebox
73 ... (3 indent ) Drop water firebox
.. (2 indent ) Return and reverse
74 ... (3 indent ) Drop water firebox
75 .. (2 indent ) Return fire tube
76 ... (3 indent ) Drop water firebox
77 .... (4 indent ) Internal water tube
... (3 indent ) Water firebox
79 .. (2 indent ) Subjacent water arch
80 .. (2 indent ) Subjacent flue
81 .. (2 indent ) Subjacent transverse fire tube
.. (2 indent ) Superjacent feed heater
82 ... (3 indent ) In communication
83 .. (2 indent ) Transverse diaphragm
.. (2 indent ) Two diameters
84 ... (3 indent ) Great diameter over firebox
85 ... (3 indent ) Small diameter over firebox
86 .... (4 indent ) Water firebox
87 .. (2 indent ) U-coupling
88 .. (2 indent ) Upper drum
.. (2 indent ) Water arch
89 ... (3 indent ) Rear of fire tube
90 .. (2 indent ) Water firebox
... (3 indent ) Firebox water heater
91 .... (4 indent ) Trapped circuit
92 ... (3 indent ) Magazine
93 ... (3 indent ) Offset
94.1 .... (4 indent ) Water tube type
95.1 ... (3 indent ) Plural with common combustion chamber
95.2 .... (4 indent ) Multiboilers
96 ... (3 indent ) Superposed
... (3 indent ) Water grate
97 .... (4 indent ) Downdraft
98 .... (4 indent ) Updraft
... (3 indent ) Water tube
99 .... (4 indent ) Straddle
... (3 indent ) Water tube type
100 .... (4 indent ) Interposed flue
101 .. (2 indent ) Water smoke box
.. (2 indent ) Water tube
... (3 indent ) Horizontal
102 .... (4 indent ) Over bridge wall
103 ... (3 indent ) Rear of fire tube
... (3 indent ) Rearwardly declined
104 .... (4 indent ) Over bridge wall
... (3 indent ) Rearwardly inclined
105 .... (4 indent ) Over bridge wall
106 .. (2 indent ) Water wall
107 ... (3 indent ) Drop water firebox
108 ... (3 indent ) Subjacent water tube
109 . (1 indent ) Inclined
110 .. (2 indent ) Horizontal boiler
111 .. (2 indent ) Vertical boiler
112 ... (3 indent ) Water firebox
113 .. (2 indent ) Water tube
114 . (1 indent ) Vertical
116 .. (2 indent ) Central fire dome
117 .. (2 indent ) Central magazine
.. (2 indent ) Circulation tube
118 ... (3 indent ) Internal
119 .. (2 indent ) Cylinder
120 .. (2 indent ) Offset firebox
121 .. (2 indent ) Return fire tube
122 ... (3 indent ) Water firebox
123 .. (2 indent ) Separate compartment
124 .. (2 indent ) Side magazine
125 .. (2 indent ) Top water chamber
126 .. (2 indent ) Water firebox
127 ... (3 indent ) Annular
128 ... (3 indent ) Central magazine
.. (2 indent ) Water grate
129 ... (3 indent ) Downdraft
130 .. (2 indent ) Water tube
131 ... (3 indent ) Internal
132 ... (3 indent ) Radial loop
115 .. (2 indent ) Fluid fuel
46 . (1 indent ) Magazine
47 .. (2 indent ) Horizontal
48 .. (2 indent ) Vertical
45 . (1 indent ) Fluid fuel
135.2 . (1 indent ) Alternative stack
135.3 . (1 indent ) Sinusoidal flue
136R . (1 indent ) Horizontal
137 .. (2 indent ) Plural
138 ... (3 indent ) Water tube
139 .. (2 indent ) Drop water firebox
140.1 .. (2 indent ) Internal water tube
140.2 ... (3 indent ) Having water tube in flue
... (3 indent ) Longitudinal
141 .... (4 indent ) Drop water firebox
142 ... (3 indent ) Return fire tube
144 ... (3 indent ) Subjacent firebox
145 ... (3 indent ) Transverse
146 .... (4 indent ) Drop water firebox
147 .... (4 indent ) Return fire tube
148 ... (3 indent ) Water firebox
149 .. (2 indent ) Return fire tube
150 ... (3 indent ) Rear water tube
... (3 indent ) Water smoke box
151 .... (4 indent ) Separate
152 .. (2 indent ) Water grate in flue
153 .. (2 indent ) Water tube
154 ... (3 indent ) Over bridge wall
136C .. (2 indent ) Horizontal-corrugated or finned
155.1 . (1 indent ) Vertical
155.2 .. (2 indent ) With flue baffle
155.3 .. (2 indent ) Having exterior heating flue
155.4 .. (2 indent ) Having corrugated flue
155.5 .. (2 indent ) Having undulating flue
157 .. (2 indent ) Central magazine
158 ... (3 indent ) Water jacket
.. (2 indent ) Circulation tube
159 ... (3 indent ) Internal
160 .. (2 indent ) Concentric shell
161 ... (3 indent ) Fluid fuel
162 ... (3 indent ) Central magazine
163 .. (2 indent ) Exterior drum
165 .. (2 indent ) Internal water heater
166.1 .. (2 indent ) With internal water tube
166.2 ... (3 indent ) Loop-type tube
168 ... (3 indent ) Central magazine
170 .... (4 indent ) Header
171 ... (3 indent ) Contracted inlet
172 ... (3 indent ) Header
173 ... (3 indent ) Horizontal spur
174 ... (3 indent ) Internal fire tube
175 ... (3 indent ) Offset water firebox
176 ... (3 indent ) Transverse
177 .... (4 indent ) Fluid fuel
178 ... (3 indent ) Vertical aligned fire tube
179 .... (4 indent ) Fluid fuel
180 .... (4 indent ) Spur water tube
181 ... (3 indent ) Vertical spur
167 ... (3 indent ) Fluid fuel
182.1 .. (2 indent ) With return fire tube
182.2 ... (3 indent ) Having symmetrical arrangement of tubes
182.3 ... (3 indent ) Having tubes offset from firebox
.. (2 indent ) Spiral water conduit
183 ... (3 indent ) Fluid fuel
... (3 indent ) Water tube
184 .... (4 indent ) Annular firebox
185 .... (4 indent ) Loop
186 .... (4 indent ) Spur
187 .. (2 indent ) Transverse fire tube
164 .. (2 indent ) Insulated outlet flue
156 .. (2 indent ) Fluid fuel
188 . (1 indent ) Drop water baffle
. (1 indent ) Offset subjacent firebox
189 .. (2 indent ) Water roof
190 .. (2 indent ) Water tube
. (1 indent ) Subjacent fire tube
191 .. (2 indent ) Beyond bridge wall
192 . (1 indent ) Water bridge wall
193 . (1 indent ) Water firebox
194 .. (2 indent ) Water tube type
195 . (1 indent ) Water tube
.. (2 indent ) Feed heater
196 ... (3 indent ) Check-valved
197 .. (2 indent ) Lateral-longitudinal
198 .. (2 indent ) Lateral-vertical
199 ... (3 indent ) Firebox
200 .. (2 indent ) Over fuel grate
201 .. (2 indent ) Subjacent internal fire tube
202 .. (2 indent ) Trapped circuit
.. (2 indent ) Water grate
203 ... (3 indent ) Downdraft
204 ... (3 indent ) Intermediate draft
205 ... (3 indent ) Multiple series
206 ... (3 indent ) Solid and water bar
207 ... (3 indent ) Updraft
. (1 indent ) Zigzag conduit
208 .. (2 indent ) Fluid fuel
209.2 . (1 indent ) Feeding air
213 . (1 indent ) Plural firebox
. (1 indent ) Horizontal sections
214 .. (2 indent ) Superimposed
215 ... (3 indent ) Central connection
216 .... (4 indent ) Fluid fuel
217 .... (4 indent ) Water firebox
218 ... (3 indent ) Water firebox
219 .... (4 indent ) Central magazine
... (3 indent ) Water tube
.... (4 indent ) Internal fire tube
220 .... • (5 indent ) Water firebox
. (1 indent ) Vertical sections
221 .. (2 indent ) Annularly positioned
222 ... (3 indent ) Central magazine
223 .. (2 indent ) Longitudinally positioned
224 ... (3 indent ) Casing
225R .. (2 indent ) Transversely positioned
226 ... (3 indent ) Casing
227 .... (4 indent ) Divided section
228 ... (3 indent ) Divided section
229 ... (3 indent ) Water grate
225A ... (3 indent ) Water heater in flue
225B ... (3 indent ) Water heater in boiler
225F ... (3 indent ) Feeding air
230 .. (2 indent ) Two-section
212.1 . (1 indent ) With magazine
212.2 .. (2 indent ) With return or alternate flue
211 . (1 indent ) Fluid or solid fuel
210 . (1 indent ) Fluid fuel
232 . (1 indent ) Water grate
231 . (1 indent ) Accessories
233 . (1 indent ) Horizontal
234 . (1 indent ) Vertical
235.12 . (1 indent ) Wall structure
235.13 . (1 indent ) With fuel burners having posts and tuyeres
235.14 . (1 indent ) Tube structure
235.15 . (1 indent ) Headers and connections
235.16 . (1 indent ) For plural fluids
235.17 . (1 indent ) Having baffles
235.18 . (1 indent ) Having seals
235.19 . (1 indent ) D-type tube
235.21 .. (2 indent ) Multiple D-type tubes
235.22 . (1 indent ) Wall loop
235.23 . (1 indent ) Having specific tube patterns
235.25 .. (2 indent ) Floor screens
235.26 . (1 indent ) Having slag and ash disposal
235.27 . (1 indent ) Locomotive-type
235.28 . (1 indent ) Having rotary flame
235.29 . (1 indent ) Having forced circulation system
235.31 . (1 indent ) Having specific intenal drum and head structure
235.32 . (1 indent ) With combustion
235.33 . (1 indent ) With convection zone regulation
235.34 . (1 indent ) With parallel multiple fireboxes
235.35 . (1 indent ) With serial multiple fireboxes
238 . (1 indent ) Offset firebox
239 . (1 indent ) Superimposed firebox
240.1 . (1 indent ) Having plural fireboxes
240.2 .. (2 indent ) Series connected
240.3 .. (2 indent ) Parallel connected
241 . (1 indent ) Firebox in drum
242 . (1 indent ) Capillary
243 .. (2 indent ) Fluid fuel
. (1 indent ) Coil or loop
244 .. (2 indent ) Central standpipe
245 ... (3 indent ) Fluid fuel
246 ... (3 indent ) Annular firebox
.. (2 indent ) Horizontal
248 ... (3 indent ) Fluid fuel
249 .. (2 indent ) Vertical
250R ... (3 indent ) Fluid fuel
250S .... (4 indent ) Standpipe
251 ... (3 indent ) Central magazine
252 ... (3 indent ) Water firebox
254 .. (2 indent ) Over bridge wall
.. (2 indent ) Over firebox
... (3 indent ) Longitudinal
255 .... • (5 indent ) Drum
... (3 indent ) Transverse
256 .... • (5 indent ) Drum
.. (2 indent ) Transverse
257 .... (4 indent ) Drum
258 . (1 indent ) Downflow
259 . (1 indent ) Drum type
261 .. (2 indent ) Volute
262 . (1 indent ) Horizontal
263 .. (2 indent ) Over bridge wall
264 .. (2 indent ) Over firebox
265 . (1 indent ) Inclined
266 . (1 indent ) Internal fire tube
267 .. (2 indent ) Horizontal
268 .. (2 indent ) Inclined
269 .. (2 indent ) Plural fire tube
270 .. (2 indent ) Straddle
271 .. (2 indent ) Vertical
272 ... (3 indent ) Central magazine
273 . (1 indent ) Longitudinal upper drum
274 .. (2 indent ) Fluid fuel
276 .. (2 indent ) Firebox enclosing
277 .. (2 indent ) Over bridge wall
.. (2 indent ) Over firebox
278 ... (3 indent ) Cross
279 ... (3 indent ) Horizontal
... (3 indent ) Rear of bridge wall
280 .... (4 indent ) Bridge wall header
281 ... (3 indent ) Standpipe
282 ... (3 indent ) Vertical
283 .... (4 indent ) Fluid fuel
. (1 indent ) Over bridge wall
284 .. (2 indent ) Headers at right angles
285 .. (2 indent ) Transverse water baffle
.. (2 indent ) Water grate
286 ... (3 indent ) Downdraft
287 ... (3 indent ) Intermediate draft
. (1 indent ) Over firebox
288 .. (2 indent ) Headers at right angles
.. (2 indent ) Water grate
289 ... (3 indent ) Updraft
. (1 indent ) Rearwardly declined
.. (2 indent ) Over bridge wall
290 ... (3 indent ) Front and rear header
291 .... (4 indent ) Horizontal-longitudinal drum
292 .... • (5 indent ) Firebox tube
293 .... • (5 indent ) Longitudinal water baffle
294 .... • (5 indent ) Water wall
295 .... (4 indent ) Internal water tube
296 .... (4 indent ) Longitudinal-declined drum
297 .... (4 indent ) Transverse drum
.. (2 indent ) Over firebox
... (3 indent ) Front and rear header
298 .... (4 indent ) Horizontal-longitudinal drum
299 .... (4 indent ) Transverse drum
300 .... (4 indent ) Tubes beyond side wall
.. (2 indent ) Plural upper transverse drum
301 ... (3 indent ) Plural lower transverse drum
302 ... (3 indent ) Single lower transverse drum
. (1 indent ) Rearwardly inclined
.. (2 indent ) Over firebox
... (3 indent ) Front and rear header
303 .... (4 indent ) Transverse drum
. (1 indent ) Separate banks
304 .. (2 indent ) Opposite fireboxes
306 .. (2 indent ) Bridge wall header
307 .. (2 indent ) Central standpipe
308 ... (3 indent ) Fluid fuel
309 ... (3 indent ) Annular firebox
310 ... (3 indent ) Central magazine
312 .. (2 indent ) Horizontal-longitudinal drum
313 .. (2 indent ) Over bridge wall
.. (2 indent ) Over firebox
314 ... (3 indent ) Central header
315 ... (3 indent ) Declined
316 ... (3 indent ) Horizontal
317 .. (2 indent ) Straddle
318 .. (2 indent ) Vertical
319 ... (3 indent ) Fluid fuel
320 ... (3 indent ) Central magazine
321 . (1 indent ) Standpipe
322 .. (2 indent ) Fluid fuel
323 .. (2 indent ) Annular firebox
324 . (1 indent ) Straddle
.. (2 indent ) Plural upper drum
325 ... (3 indent ) Plural lower drum
326 .... (4 indent ) Cross
.. (2 indent ) Single upper drum
327 ... (3 indent ) Plural lower drum
328 .... (4 indent ) Fluid fuel
329 .... (4 indent ) Cross
330 .... (4 indent ) Plural firebox
331 . (1 indent ) Transverse horizontal drum
332 . (1 indent ) Vertical
333 .. (2 indent ) Fluid fuel
334 .. (2 indent ) Side magazine
335 .. (2 indent ) Annular firebox
336 .. (2 indent ) Offset firebox
337 ... (3 indent ) Elevated
.. (2 indent ) Annular lower drum
338 ... (3 indent ) Annular upper drum
339 .... (4 indent ) Central magazine
340 .... (4 indent ) Tubes over firebox
341 ... (3 indent ) Fire tube upper drum
342 ... (3 indent ) Spur tube upper drum
343 ... (3 indent ) Upper drum
344 .... (4 indent ) Central magazine
345 .. (2 indent ) Beyond bridge wall
346 ... (3 indent ) Gas return
... (3 indent ) Longitudinal upper drum
347 .... (4 indent ) Longitudinal lower drum
.. (2 indent ) Internal fire tube
348 ... (3 indent ) Fluid fuel
349 .. (2 indent ) Over firebox
350 ... (3 indent ) Gas return
.. (2 indent ) Plural upper longitudinal drum
351 ... (3 indent ) Plural lower longitudinal drum
.. (2 indent ) Plural upper transverse drum
... (3 indent ) Plural lower transverse drum
352 .... (4 indent ) Offset firebox
353 . (1 indent ) Water grate
354 .. (2 indent ) Downdraft
356 .. (2 indent ) Fluid fuel
.. (2 indent ) Over bridge wall
357 ... (3 indent ) Longitudinal drum
358 ... (3 indent ) Transverse drum
359 .. (2 indent ) Over firebox
237 . (1 indent ) Magazine
236 . (1 indent ) Fluid fuel
360 .. (2 indent ) Closures and couplings
361 ... (3 indent ) Cleaning
362 ... (3 indent ) Concentric tube
364 ... (3 indent ) Tube closures
365 . (1 indent ) Drums and couplings
367.2 . (1 indent ) Double immersed heat transmitters
367.3 . (1 indent ) Corrugated and finned heat transmitters
367.4 . (1 indent ) Pebble furnaces
369 . (1 indent ) Mud ring
. (1 indent ) Plural firebox
.. (2 indent ) Superimposed
... (3 indent ) Water grate
372 .... (4 indent ) Updraft
374 . (1 indent ) Grate structure
375 .. (2 indent ) Solid and water bar
376 . (1 indent ) Progressive feed
. (1 indent ) Water firebox
.. (2 indent ) Solid and water bar
377 ... (3 indent ) Updraft
378 .. (2 indent ) Updraft
24 . (1 indent ) Explosion
. (1 indent ) Plural burner
25 .. (2 indent ) Superimposed
28 . (1 indent ) Water in contact
380 . (1 indent ) Agitating circulator
381 .. (2 indent ) Bottom and surface
382 .. (2 indent ) Bottom
383 ... (3 indent ) Internal conduit
384 .... (4 indent ) Ejector
385 .... (4 indent ) Mud ring
387 .... (4 indent ) Scraper
388 .... (4 indent ) Valved
389 .. (2 indent ) Surface exit
390 . (1 indent ) Fluid jet
391 .. (2 indent ) Horizontal fire tube boiler
392 .. (2 indent ) Water tube boiler
393 . (1 indent ) Mud drum
395 . (1 indent ) Sandblast
396 . (1 indent ) Systems
397 . (1 indent ) Trapped circuit
398 .. (2 indent ) Feeding water
399 .. (2 indent ) Surface and bottom exit
400 .. (2 indent ) Surface exit
401 ... (3 indent ) Chemical feeder
402 ... (3 indent ) Circulating pump
403 ... (3 indent ) Feed heater
404 ... (3 indent ) Steam injector
405 . (1 indent ) Wash-out nozzle
406.2 . (1 indent ) Having anticavitation devices
406.3 . (1 indent ) Having restrictors and orifices
406.4 . (1 indent ) Once through
406.5 . (1 indent ) With start-up operations
407 . (1 indent ) Injector
408.1 . (1 indent ) Having internal conduit
408.2 .. (2 indent ) With internal geyser tube
409 .. (2 indent ) Horizontal flue boiler
410 ... (3 indent ) Return fire tube
411 .. (2 indent ) Internal
413 . (1 indent ) Ash pan
. (1 indent ) Boiler circuit
414 .. (2 indent ) Feed-injected
. (1 indent ) Circulatioon
.. (2 indent ) Surface exit
... (3 indent ) Mechanical pump
415 .... (4 indent ) Feed-injected
417 . (1 indent ) Drip plate in boiler
. (1 indent ) Fire-engine boiler
418 ... (3 indent ) Attached
419 ... (3 indent ) Detachable
420 . (1 indent ) Furnace gases
421 . (1 indent ) Offtake flue
422 . (1 indent ) Furnace gases and steam
. (1 indent ) Horizontal fire tube boiler
423 .. (2 indent ) Smoke box
424 ... (3 indent ) Exhaust pipe
425 ... (3 indent ) Furnace gases and steam
426 ... (3 indent ) Water tube
427 .. (2 indent ) Smoke chamber
428 . (1 indent ) Internal conduit
429 .. (2 indent ) Automatic sediment valve
430 .. (2 indent ) Blow-off delivery
431 .. (2 indent ) Filter in boiler
432 .. (2 indent ) Furnace gases
433 .. (2 indent ) Trap outside boiler
434 . (1 indent ) Locomotive tender
435 . (1 indent ) Pan in steam space
437 . (1 indent ) Safety valve
438 . (1 indent ) Spray to steam space
442 .. (2 indent ) Injected
... (3 indent ) Superposed
443 .... (4 indent ) Open to steam space
444 . (1 indent ) Water tube boiler
. (1 indent ) Fuel and water
446 .. (2 indent ) Fluid fuel
447 ... (3 indent ) Cutoff
.. (2 indent ) Automatic control
449 ... (3 indent ) Solid fuel
450 . (1 indent ) Suspended boiler
448.1 AUTOMATIC CONTROL OF FLUID FUEL AND WATER
448.2 . (1 indent ) Having fuel or feed bypass
448.3 . (1 indent ) Multiple boiler regulation
448.4 . (1 indent ) Once through
451.1 .. (2 indent ) Thermally controlled
451.2 ... (3 indent ) Pressure-operated valve
452 . (1 indent ) Boiler pressure
456 .. (2 indent ) Automatic
457 ... (3 indent ) Heater
458 .. (2 indent ) Heater
451S . (1 indent ) Once through
460 . (1 indent ) Boilers with superheaters
. (1 indent ) Fire tube boiler
.. (2 indent ) Horizontal
461 ... (3 indent ) Superheater
.... (4 indent ) In fire tube
462 .... • (5 indent ) From smoke box
.... (4 indent ) Interior steam space
463 .... • (5 indent ) Internal fire tube
.... (4 indent ) Smoke box
464 .... • (5 indent ) Fire tube
465 .... • (5 indent ) Steam tube
466 .. (2 indent ) Superheater and feed heater
467 ... (3 indent ) Superheater
. (1 indent ) Flue boiler
... (3 indent ) Internal water tube
468 .... (4 indent ) Superheater
. (1 indent ) Horizontal boiler
.. (2 indent ) Superheater
469 ... (3 indent ) Rear of firebox
470 ... (3 indent ) Waste-heat flue
. (1 indent ) Water tube boiler
.. (2 indent ) Declined over bridge wall
... (3 indent ) Front and rear header
.... (4 indent ) Declined drum
471 .... • (5 indent ) Superheater
.... (4 indent ) Longitudinal drum
472 .... • (5 indent ) Superheater
.. (2 indent ) Longitudinal drum
473 ... (3 indent ) Superheater
.. (2 indent ) Over bridge wall
474 ... (3 indent ) Superheater
... (3 indent ) Spur tube
475 .... (4 indent ) Superheater
.. (2 indent ) Transverse drum
478 ... (3 indent ) Superheater
477 .. (2 indent ) Superheater and feed heater
476 .. (2 indent ) Superheater
. (1 indent ) Superheater
480 .. (2 indent ) Damper-controlled
481 .. (2 indent ) Firebox
482 .. (2 indent ) Fire tube in steam space
483 .. (2 indent ) Indirectly heated
484 .. (2 indent ) Separate charges
485 .. (2 indent ) Separate furnace
486 .. (2 indent ) Steam dome
487 .. (2 indent ) Water-injected
479.1 . (1 indent ) Automatic heat regulation of superheater
479.2 .. (2 indent ) Having gas recirculation
479.3 .. (2 indent ) Having flame positioning
479.4 .. (2 indent ) With variable firing
479.5 .. (2 indent ) Having dampers
479.6 .. (2 indent ) Plural furnaces
479.7 .. (2 indent ) Once through
488 . (1 indent ) Boiler circulation
489 . (1 indent ) Boiler return
490 . (1 indent ) For tilting boilers
491 . (1 indent ) Interior of boilers
492 . (1 indent ) Steam dome
495 CROWN SHEETS PROTECTING
496 CROWN SHEETS AND STAYS
500 .. (2 indent ) Water firebox
502 . (1 indent ) Fluid fuel
504.1 . (1 indent ) Fusible control
504.2 . (1 indent ) Alarms or indicators
. (1 indent ) Fire extinguishers
504.3 .. (2 indent ) Fusible control
505 .. (2 indent ) Float-controlled
506 .. (2 indent ) Pressure-controlled
507 . (1 indent ) Self-closing valve
509 SUBMERGED STEAM CHAMBER
511 TUBES AND CONNECTIONS
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 . (1 indent ) Electric (122/13.2)
. (1 indent ) Fire tube and water tube (122/unnumbered)
FOR102 .. (2 indent ) Fluid fuel (122/16)
. (1 indent ) Fire tube (122/unnumbered)
FOR103 .. (2 indent ) Fluid fuel (122/17)
. (1 indent ) Water tube (122/unnumbered)
.. (2 indent ) Below boiler (122/unumbered)
FOR104 ... (3 indent ) Fluid fuel (122/18)
.. (2 indent ) Casing (122/unnumbered)
FOR105 ... (3 indent ) Fluid fuel (122/19)
FOR106 . (1 indent ) Fluid fuel (122/14)
FOR107 . (1 indent ) Solid fuel (122/15)
DIG2 AIR HEATER - INDIRECTLY HEATED
DIG4 ONCE THROUGH BOILERS
DIG6 DAMPER-DIRECTED RADIATION
DIG11 REMOVABLE STEAM-HEATING ELEMENTS
DIG13 TUBES - COMPOSITION AND PROTECTION
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