US Patent Class 310
ELECTRICAL GENERATOR OR MOTOR STRUCTURE
 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 | DF | EDUCATIONAL OR CONSTRUCTION UNITS OR KITS |
| 300 | DF | NON-DYNAMOELECTRIC |
| 301 | DF | .~ Nuclear reaction |
| 302 | DF | .~.~ Contact potential difference |
| 303 | DF | .~.~ P-N semiconductor |
| 304 | DF | .~.~ Secondary electron emission |
| 305 | DF | .~.~ Direct charge particle emission |
| 306 | DF | .~ Thermal or pyromagnetic |
| 307 | DF | .~.~ With heat actuated bimetal element |
| 308 | DF | .~ Charge accumulating |
| 309 | DF | .~.~ Electrostatic |
| 310 | DF | .~.~.~ Friction |
| 311 | DF | .~ Piezoelectric elements and devices |
| 312 | DF | .~.~ Adding or subtracting mass |
| 313 R | DF | .~.~ Surface acoustic wave devices |
| 313 A | DF | .~.~.~ Orientation of piezoelectric material |
| 313 B | DF | .~.~.~ Interdigitated electrodes |
| 313 C | DF | .~.~.~.~ Envelope or apodized |
| 313 D | DF | .~.~.~.~ Grating or reflector in wave path |
| 314 | DF | .~.~ Electrical systems |
| 315 | DF | .~.~.~ Temperature compensation circuits |
| 316.01 | DF | .~.~.~ Input circuit for simultaneous electrical and mechanical output from piezoelectric element |
| 316.02 | DF | .~.~.~.~ Traveling wave motor |
| 316.03 | DF | .~.~.~.~ Charging and discharging |
| 317 | DF | .~.~.~ Input circuit for mechanical output from piezoelectric element |
| 318 | DF | .~.~.~ Input circuit for electrical output from piezoelectric element |
| 319 | DF | .~.~.~ Electrical output circuit |
| 320 | DF | .~.~ Piezoelectric slab having different resonant frequencies at different areas |
| 321 | DF | .~.~ Combined with resonant structure |
| 322 | DF | .~.~.~ Acoustic wave type generator or receiver |
| 323.01 | DF | .~.~.~ Direct mechanical coupling |
| 323.02 | DF | .~.~.~.~ Motor producing continual motion |
| 323.03 | DF | .~.~.~.~.~ Traveling wave motor |
| 323.04 | DF | .~.~.~.~.~.~ Stator |
| 323.05 | DF | .~.~.~.~.~.~.~ Support |
| 323.06 | DF | .~.~.~.~.~.~.~ Piezoelectric element or electrode |
| 323.07 | DF | .~.~.~.~.~.~.~ Oval track |
| 323.08 | DF | .~.~.~.~.~.~ Armature |
| 323.09 | DF | .~.~.~.~.~.~.~ Pressing means detail |
| 323.11 | DF | .~.~.~.~.~.~ Specific material or composition |
| 323.12 | DF | .~.~.~.~.~ Langevin or pencil type motor |
| 323.13 | DF | .~.~.~.~.~.~ Output member detail |
| 323.14 | DF | .~.~.~.~.~.~.~ Roller or ball element |
| 323.15 | DF | .~.~.~.~.~.~.~ Material or material property |
| 323.16 | DF | .~.~.~.~.~ Eliptical motion at fixed point (i.e., walking) or Ratchet and Pawl motor |
| 323.17 | DF | .~.~.~.~ Positions an object |
| 323.18 | DF | .~.~.~.~ Device performs work on an object (e.g., welding, cutting) |
| 323.19 | DF | .~.~.~.~ Horn or transmission line |
| 323.21 | DF | .~.~.~.~ Detector (e.g., sensor) |
| 324 | DF | .~.~.~ Diaphragm |
| 325 | DF | .~.~.~ Sandwich or Langevin type |
| 326 | DF | .~.~ Combined with damping structure |
| 327 | DF | .~.~.~ On back of piezoelectric element |
| 328 | DF | .~.~ With mechanical energy coupling means |
| 329 | DF | .~.~.~ Including inertia type operator |
| 330 | DF | .~.~.~ Bending type |
| 331 | DF | .~.~.~.~ Plural elements |
| 332 | DF | .~.~.~.~.~ Multimorph |
| 333 | DF | .~.~.~ Shear or torsional type |
| 334 | DF | .~.~.~ Acoustic wave type generator or receiver |
| 335 | DF | .~.~.~.~ With lens or reflector |
| 336 | DF | .~.~.~.~ Nondestructive testing type |
| 337 | DF | .~.~.~.~ Underwater type |
| 338 | DF | .~.~.~ Force or pressure measuring type |
| 339 | DF | .~.~.~ Voltage, spark or current generator |
| 340 | DF | .~.~ Encapsulated or coated |
| 341 | DF | .~.~ With temperature modifier and/or gas or vapor atmosphere control |
| 342 | DF | .~.~.~ For plural piezoelectric elements |
| 343 | DF | .~.~.~ With heating element |
| 344 | DF | .~.~.~ Sealed unit |
| 345 | DF | .~.~ Supported by elastic material |
| 346 | DF | .~.~ With temperature compensating structure |
| 347 | DF | .~.~.~ Compensated air gap |
| 348 | DF | .~.~ With mounting or support means |
| 349 | DF | .~.~.~ Air gap |
| 350 | DF | .~.~.~.~ Adjustable |
| 351 | DF | .~.~.~ Suspended by thin member |
| 352 | DF | .~.~.~.~ Point contact on major surfce only |
| 353 | DF | .~.~.~.~ Contact at edges only |
| 354 | DF | .~.~.~ Clamped |
| 355 | DF | .~.~.~.~ Spring bias |
| 356 | DF | .~.~.~.~.~ 90 degrees to major surface and margin clamped only |
| 357 | DF | .~.~ Orientation of piezoelectric polarization |
| 358 | DF | .~.~.~ Ceramic composition (e.g., barium titanate) |
| 359 | DF | .~.~.~.~ More than one poling direction (e.g., Rosen transformer) |
| 360 | DF | .~.~ Rotation of crystal axis (e.g., cut angle) |
| 361 | DF | .~.~.~ Quartz |
| 362 | DF | .~.~.~ Rochelle salt |
| 363 | DF | .~.~ Electrode materials |
| 364 | DF | .~.~.~ Multilayer |
| 365 | DF | .~.~ Electrode arrangement |
| 366 | DF | .~.~.~ More than two |
| 367 | DF | .~.~ Piezoelectric element shape |
| 368 | DF | .~.~.~ Rectangular plate |
| 369 | DF | .~.~.~ Circular disc, ring, or cylinder |
| 370 | DF | .~.~.~ "U" or "tuning fork" shape |
| 371 | DF | .~.~.~ Sphere or hemisphere |
| 10 | DF | DYNAMOELECTRIC |
| 11 | DF | .~ Conducting fluid |
| 12 | DF | .~ Linear |
| 13 | DF | .~.~ Fixed and movable wound elements |
| 14 | DF | .~.~ Solenoid and core type |
| 15 | DF | .~ Reciprocating |
| 16 | DF | .~.~ With cooling or temperature modification |
| 17 | DF | .~.~ With other elements |
| 19 | DF | .~.~.~ Speed control or time delay |
| 20 | DF | .~.~.~ Motion-converting mechanism |
| 21 | DF | .~.~.~.~ Pivoted or flat-spring armature |
| 22 | DF | .~.~.~.~.~ Plural armatures |
| 23 | DF | .~.~.~.~ Solenoid and core type |
| 24 | DF | .~.~.~.~.~ Plural cores |
| 25 | DF | .~.~ Reed type |
| 26 | DF | .~.~ Magnetostrictive |
| 27 | DF | .~.~ Fixed and movable wound elements |
| 28 | DF | .~.~ Direct-connected |
| 29 | DF | .~.~.~ Pivoted or flat-spring armature |
| 30 | DF | .~.~.~ Solenoid and core |
| 31 | DF | .~.~ Self-actuated interrupter |
| 32 | DF | .~.~.~ Pivoted or flat-spring armature |
| 33 | DF | .~.~.~.~ Plural armatures |
| 34 | DF | .~.~.~ Solenoid and core |
| 35 | DF | .~.~.~.~ Successively energized solenoid coils |
| 36 | DF | .~ Oscillating |
| 37 | DF | .~.~ With motion-converting mechanism |
| 38 | DF | .~.~ Direct-connected |
| 39 | DF | .~.~ With interrupter |
| 40 R | DF | .~ Rotary |
| 40.5 | DF | .~.~ Self-nutating or moving (e.g., oscillating fan, etc.) |
| 41 | DF | .~.~ With mechanical starters |
| 42 | DF | .~.~ With assembling, metal casting or machining feature |
| 43 | DF | .~.~ Molded plastic |
| 44 | DF | .~.~ Powdered metal |
| 45 | DF | .~.~ Impregnated or coated |
| 46 | DF | .~.~ Magnetic motors |
| 47 | DF | .~.~.~ Portable or hand tool (e.g., dry shavers) |
| 48 | DF | .~.~.~ With other elements |
| 49 R | DF | .~.~.~ Step-by-step |
| 49 A | DF | .~.~.~.~ Claw-tooth and printed circuit components |
| 50 | DF | .~.~ Portable or hand tool |
| 51 | DF | .~.~ Vibration or noise suppression |
| 52 | DF | .~.~ Cooling or fluid contact |
| 53 | DF | .~.~.~ With control means |
| 54 | DF | .~.~.~ Liquid coolant |
| 55 | DF | .~.~.~ Nonatmospheric gas |
| 56 | DF | .~.~.~ With gas purification or treating |
| 57 | DF | .~.~.~ Intermediate confined coolant |
| 58 | DF | .~.~.~ Circulation |
| 59 | DF | .~.~.~.~ Plural units or plural paths |
| 60 R | DF | .~.~.~.~ Self-forced |
| 61 | DF | .~.~.~.~.~ Rotor passage |
| 62 | DF | .~.~.~.~.~ Suction pump or fan |
| 63 | DF | .~.~.~.~.~ Pressure pump or fan |
| 60 A | DF | .~.~.~.~.~ Hollow passages |
| 64 | DF | .~.~.~.~ Heat-exchange structure |
| 65 | DF | .~.~.~.~.~ Spacers (e.g., laminae, coils, etc.) |
| 66 | DF | .~.~ With other elements |
| 67 R | DF | .~.~.~ Inbuilt or incorporated unit |
| 67 A | DF | .~.~.~.~ Bicycle-hub generators |
| 68 R | DF | .~.~.~ Electric circuit elements |
| 69 | DF | .~.~.~.~ Shaft-driven switch (e.g., blasting generators) |
| 70 R | DF | .~.~.~.~.~ Distributor or timer (e.g., ignition magnetos) |
| 70 A | DF | .~.~.~.~.~.~ Ignition systems |
| 71 | DF | .~.~.~.~ Connectors, terminals or lead-ins |
| 72 | DF | .~.~.~.~ Impedance devices |
| 73 | DF | .~.~.~.~ Illuminating devices |
| 68 A | DF | .~.~.~.~ Manually operable (e.g., switches, rheostats, etc.) |
| 68 B | DF | .~.~.~.~ Condition responsive (e.g., position, torque, etc.) |
| 68 C | DF | .~.~.~.~ Temperature, current-responsive, i.e., protectors |
| 68 D | DF | .~.~.~.~ Conversion elements, (e.g., transformers, rectifiers, etc.) |
| 68 E | DF | .~.~.~.~ Motion responsive (e.g., centrifugal switches) |
| 74 | DF | .~.~.~ Inertia or fly-wheel device |
| 75 R | DF | .~.~.~ Drive mechanism |
| 76 | DF | .~.~.~.~ Brake and clutch |
| 77 | DF | .~.~.~.~ Brake |
| 78 | DF | .~.~.~.~ Clutch |
| 79 | DF | .~.~.~.~ Shaft and armature timing or phasing connection |
| 80 | DF | .~.~.~.~ Motion conversion |
| 81 | DF | .~.~.~.~.~ Unbalanced weight (e.g., vibrators) |
| 82 | DF | .~.~.~.~.~ Swash plate |
| 83 | DF | .~.~.~.~.~ Gearing |
| 84 | DF | .~.~.~.~.~ Impulse coupling |
| 75 A | DF | .~.~.~.~ Spring or gravity drive |
| 75 B | DF | .~.~.~.~ Hand- or foot-operated |
| 75 C | DF | .~.~.~.~ Rim drive (e.g., bicycle generator drive by wheel, rim, or tire) |
| 75 D | DF | .~.~.~.~ Flexible shaft or coupling and hollow shaft drive |
| 85 | DF | .~.~.~ Mechanical shields or protectors |
| 86 | DF | .~.~.~.~ Shield in air gap |
| 87 | DF | .~.~.~.~ Submersible |
| 88 | DF | .~.~.~.~ Dirt, moisture or explosion proof |
| 89 | DF | .~.~.~.~ Housings, windows or covers |
| 90 | DF | .~.~.~ Bearing or air-gap adjustment or bearing lubrication |
| 90.5 | DF | .~.~.~.~ Magnetic bearing |
| 91 | DF | .~.~.~ Supports |
| 92 | DF | .~.~ Torque-transmitting clutches or brakes |
| 93 | DF | .~.~.~ Brake type |
| 94 | DF | .~.~.~ Automatic control |
| 95 | DF | .~.~.~.~ By speed |
| 96 | DF | .~.~.~ With other drive mechanism |
| 97 | DF | .~.~.~.~ Output bias or resistance device |
| 98 | DF | .~.~.~.~ Drive motor |
| 99 | DF | .~.~.~.~ Gearing |
| 100 | DF | .~.~.~.~ Mechanical clutch |
| 101 | DF | .~.~.~ Plural units |
| 102 R | DF | .~.~.~ Generator-motor type |
| 102 A | DF | .~.~.~.~ Homopolar clutches |
| 103 | DF | .~.~.~ Magnetic field type |
| 104 | DF | .~.~.~.~ With air-gap shield |
| 105 | DF | .~.~.~.~ Induced or eddy current type |
| 106 | DF | .~.~.~.~.~ Magnetic reluctance feature |
| 107 | DF | .~.~.~.~.~ With collection means for induced current |
| 108 | DF | .~.~.~.~.~.~ Delivery to external device |
| 109 | DF | .~.~.~.~.~.~.~ Electric motor |
| 110 | DF | .~.~.~.~.~.~.~ Impedance |
| 111 | DF | .~.~ Generated wave-form modification |
| 112 | DF | .~.~ Plural units, structurally united |
| 113 | DF | .~.~.~ Motor-generator sets |
| 114 | DF | .~.~ Plural rotary elements |
| 115 | DF | .~.~.~ Field and armature both rotate |
| 116 | DF | .~.~.~.~ Limited movement |
| 117 | DF | .~.~.~.~.~ Mechanical bias |
| 118 | DF | .~.~.~.~ With interconnecting drive mechanism |
| 119 | DF | .~.~.~.~.~ Fluid-drive mechanism |
| 120 | DF | .~.~.~.~.~ Friction-drive mechanism |
| 121 | DF | .~.~.~.~.~ Mechanically controlled element |
| 122 | DF | .~.~.~.~.~.~ By additional dynamoelectric machine |
| 123 | DF | .~.~.~.~.~.~ Friction brake |
| 124 | DF | .~.~.~ Plural short-circuited rotary elements |
| 125 | DF | .~.~.~.~ Squirrel cage type |
| 126 | DF | .~.~.~ Plural armatures in common field |
| 127 | DF | .~.~ Plural collector-type machines |
| 128 | DF | .~.~.~ Commutator and slip-ring type |
| 129 | DF | .~.~.~.~ Synchronous or rotary converter |
| 130 | DF | .~.~.~.~.~ For plural wire D.C. system |
| 131 | DF | .~.~.~.~ Different armature circuits |
| 132 | DF | .~.~.~.~.~ Polyphase armature winding |
| 133 | DF | .~.~.~.~ Common armature winding |
| 134 | DF | .~.~.~.~.~ With plural field windings |
| 135 | DF | .~.~.~.~ Commutator in field circuit |
| 136 | DF | .~.~.~ Plural commutator type |
| 137 | DF | .~.~.~.~ Double current D. C. machines |
| 138 | DF | .~.~.~.~.~ Dynamotor type |
| 139 | DF | .~.~.~.~.~ Hetero-axial excitation |
| 140 | DF | .~.~.~.~ Plural armature windings |
| 141 | DF | .~.~.~.~.~ Plural field windings |
| 142 | DF | .~.~.~.~ Plural field windings |
| 143 | DF | .~.~.~ Plural slip-ring sets |
| 144 | DF | .~.~.~.~ Plural armature windings |
| 145 | DF | .~.~.~.~.~ Plural sets of poles |
| 146 | DF | .~.~.~.~.~ Polyphase windings |
| 147 | DF | .~.~.~.~.~ Slip rings in field circuit |
| 148 | DF | .~.~.~ Plural sets of brushes |
| 149 | DF | .~.~.~.~ Plural field windings |
| 150 | DF | .~.~.~.~.~ Polyphase arrangement |
| 151 | DF | .~.~.~.~ Short circuiting conductor between brushes |
| 152 | DF | .~.~ Permanent magnet machines |
| 153 | DF | .~.~.~ Inbuilt with flywheel (magneto) |
| 154 | DF | .~.~.~ Permanent magnet stator |
| 155 | DF | .~.~.~.~ Inductor type |
| 156 | DF | .~.~.~ Permanent magnet rotor |
| 157 | DF | .~.~ Vertically disposed |
| 158 | DF | .~.~ Universal (A.C. or D.C.) |
| 159 | DF | .~.~ A.C. |
| 160 | DF | .~.~.~ Frequency converters |
| 161 | DF | .~.~.~ Phase-shifter type |
| 162 | DF | .~.~.~ Synchronous |
| 163 | DF | .~.~.~.~ Reaction type |
| 164 | DF | .~.~.~.~.~ Toroidal coil |
| 165 | DF | .~.~.~.~ D.C. excited |
| 166 | DF | .~.~.~ Induction |
| 167 | DF | .~.~.~.~ With repulsion-starting |
| 168 | DF | .~.~.~.~ Inductor-type generators (variable reluctance) |
| 169 | DF | .~.~.~.~.~ High frequency |
| 170 | DF | .~.~.~.~.~.~ Multifrequency |
| 171 | DF | .~.~.~.~ Induction generators |
| 172 | DF | .~.~.~.~ Shifting field (e.g., shading pole) |
| 173 | DF | .~.~.~ Commutated |
| 174 | DF | .~.~.~.~ Single phase |
| 175 | DF | .~.~.~.~.~ Conduction operation |
| 176 | DF | .~.~.~.~.~ Transformer operation |
| 177 | DF | .~.~ D.C. |
| 178 | DF | .~.~.~ Homopolar |
| 179 | DF | .~.~ Windings and core structure |
| 180 | DF | .~.~.~ Field or excitation windings or structure |
| 181 | DF | .~.~.~.~ Combined permanent and electromagnet |
| 182 | DF | .~.~.~.~ With short-circuited winding or conductor |
| 183 | DF | .~.~.~.~.~ Damper winding |
| 184 | DF | .~.~.~.~ Plural field windings |
| 185 | DF | .~.~.~.~.~ Plural sets of poles |
| 186 | DF | .~.~.~.~.~ Interpole, compensating or neutralizing poles |
| 187 | DF | .~.~.~.~.~ Slotted or divided pole |
| 188 | DF | .~.~.~.~.~ Differentially related |
| 189 | DF | .~.~.~.~ Variable length or tapped winding |
| 190 | DF | .~.~.~.~ Magnetic shunts for shifting field flux |
| 191 | DF | .~.~.~.~ Adjustable magnetic structure |
| 192 | DF | .~.~.~.~ Nonmagnetic inserts or air gaps |
| 193 | DF | .~.~.~.~ Nonuniform core cross section |
| 194 | DF | .~.~.~.~ Coil supports and spools |
| 195 | DF | .~.~.~ Armature or primary |
| 196 | DF | .~.~.~.~ Corona-prevention |
| 197 | DF | .~.~.~.~ With short-circuited winding or conductor |
| 198 | DF | .~.~.~.~ Plural windings |
| 199 | DF | .~.~.~.~.~ Combined stationary and rotary |
| 200 | DF | .~.~.~.~ Variable length or tapped windings |
| 201 | DF | .~.~.~.~ Bar windings |
| 202 | DF | .~.~.~.~ Open windings |
| 203 | DF | .~.~.~.~ Closed windings |
| 204 | DF | .~.~.~.~.~ Equalizers |
| 205 | DF | .~.~.~.~.~ Multiplex |
| 206 | DF | .~.~.~.~.~ Lap |
| 207 | DF | .~.~.~.~.~ Wave |
| 208 | DF | .~.~.~.~ Coils |
| 209 | DF | .~.~.~.~ Adjustable magnetic structure |
| 210 | DF | .~.~.~ Secondary windings or conductors |
| 211 | DF | .~.~.~.~ Squirrel cage |
| 212 | DF | .~.~.~.~.~ Inherently variable impedance (double squirrel cage) |
| 213 | DF | .~.~.~ Antiparasitic conductors (imbricated) |
| 214 | DF | .~.~.~ Coil retainers or slot closers |
| 215 | DF | .~.~.~ Slot liners |
| 216 | DF | .~.~.~ Core features |
| 217 | DF | .~.~.~.~ Securing laminae |
| 218 | DF | .~.~.~.~ Pole assembly and securing means |
| 219 | DF | .~.~ Current collectors |
| 220 | DF | .~.~.~ Spark-reduction |
| 221 | DF | .~.~.~.~ Arc extinguishers |
| 222 | DF | .~.~.~.~ Spark-neutralizing current |
| 223 | DF | .~.~.~.~ Flux compensators |
| 224 | DF | .~.~.~.~.~ Commutating poles or windings |
| 225 | DF | .~.~.~.~.~ Short-circuited coil circuit |
| 226 | DF | .~.~.~.~.~ Field-distortion |
| 227 | DF | .~.~.~ With cooling |
| 228 | DF | .~.~.~ With cleaning, lubricating, resurfacing or repairing |
| 229 | DF | .~.~.~ Brush-traversing |
| 230 | DF | .~.~.~ Circumferential brush shifting on reversal |
| 231 | DF | .~.~.~ Rotary structure |
| 232 | DF | .~.~.~.~ Slip rings |
| 233 | DF | .~.~.~.~ Commutators |
| 234 | DF | .~.~.~.~.~ Winding connectors |
| 235 | DF | .~.~.~.~.~ Molded support |
| 236 | DF | .~.~.~.~.~ Cylindrical or drum |
| 237 | DF | .~.~.~.~.~ Disc |
| 238 | DF | .~.~.~ Fixed structure |
| 239 | DF | .~.~.~.~ Brush holders or rigging |
| 240 | DF | .~.~.~.~.~ Brush-lifting |
| 241 | DF | .~.~.~.~.~ Circumferential adjustment |
| 242 | DF | .~.~.~.~.~ Brush engagements or guides |
| 243 | DF | .~.~.~.~.~ Fluid pressure-operated |
| 244 | DF | .~.~.~.~.~ Brush affixed to pivoted arm |
| 245 | DF | .~.~.~.~.~ Slidable brush |
| 246 | DF | .~.~.~.~.~.~ Pressure arm |
| 247 | DF | .~.~.~.~.~.~ Axial spring |
| 248 | DF | .~.~.~.~ Brushes |
| 249 | DF | .~.~.~.~.~ With electrical connector |
| 251 | DF | .~.~.~.~.~ Structure (e.g., composite material) |
| 252 | DF | .~.~.~.~.~ With composition feature |
| 253 | DF | .~.~.~.~.~.~ Carbonaceous |
| 254 | DF | .~.~ Stator structure |
| 255 | DF | .~.~.~ For railway-type machines |
| 256 | DF | .~.~.~ Stray field flux loss prevention |
| 257 | DF | .~.~.~ Interfitting or claw-tooth stators |
| 258 | DF | .~.~.~ Frame and core type |
| 259 | DF | .~.~.~.~ Core assembly |
| 260 | DF | .~.~.~.~ End turn supports |
| 261 | DF | .~.~ Rotor structure |
| 262 | DF | .~.~.~ High-speed rotor type |
| 263 | DF | .~.~.~ Interfitting or claw tooth rotors |
| 264 | DF | .~.~.~ Armatures |
| 265 | DF | .~.~.~.~ Drum |
| 266 | DF | .~.~.~.~ Hollow (e.g., double air gap) |
| 267 | DF | .~.~.~.~ Ring |
| 268 | DF | .~.~.~.~ Disc |
| 269 | DF | .~.~.~.~ Salient pole |
| 270 | DF | .~.~.~ End turn supports |
| 271 | DF | .~.~.~ Banding |
| 272 | DF | .~.~ Elements |
| 273 | DF | .~.~ Miscellaneous |
| 40 MM | DF | .~.~ Miniature motors |
| ****************************** | ||
| CROSS-REFERENCE ART COLLECTION | ||
| ****************************** | ||
| 800 | DF | PIEZOELECTRIC POLYMERS (E.G., MYLAR, PVDF) |
| ****************************** | ||
| DIGESTS | ||
| ****************************** | ||
| DIG 2 | DD | Hysteresis rotors and motors |
| DIG 3 | DD | Hall effect generators and converters |
| DIG 6 | DD | Printed-circuit motors and components |