| | CLASS NOTES |
| 1.01 | DF | INSTRUMENT PROVING OR CALIBRATING {13} |
| 7 | DF | BY ABRASION, MILLING, RUBBING, OR SCUFFING {1} |
| 9 | DF | FRICTIONAL RESISTANCE, COEFFICIENT OR CHARACTERISTICS {1} |
| 11.01 | DF | TESTING IMPACT DELIVERING DEVICE (E.G., A HAMMER) {2} |
| 11.04 | DF | TESTING OF SHOCK ABSORBING DEVICE (E.G., AUTOMOBILE SHOCK ABSORBER, GUN RECOIL APPARATUS, ETC.) {4} |
| 12.01 | DF | TESTING BY IMPACT OR SHOCK {5} |
| 19.01 | DF | GAS CONTENT OF A LIQUID OR A SOLID {9} |
| 23.2 | DF | GAS ANALYSIS {15} |
| 32 R | DF | SPECIFIC GRAVITY OR DENSITY OF LIQUID OR SOLID {7} |
| 35.01 | DF | ENGINE DETONATION (E.G., KNOCK) {4} |
| 35.14 | DF | EXPLOSIVE {3} |
| 36 | DF | ILLUMINATING FLUID |
| 37 | DF | WITH FLUID PRESSURE {8} |
| 52 | DF | TESTING SEALED RECEPTACLE |
| 53.01 | DF | LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15} |
| 65.01 | DF | CENTER OF GRAVITY; TURNING MOMENT; METACENTRIC HEIGHT {6} |
| 66 | DF | ROTOR UNBALANCE {7} |
| 570 | DF | VIBRATION {10} |
| 73 | DF | MOISTURE CONTENT OR ABSORPTION CHARACTERISTIC OF MATERIAL {4} |
| 78 | DF | HARDNESS {2} |
| 86 | DF | EMBRITTLEMENT OR EROSION |
| 87 | DF | DUCTILITY OR BRITTLENESS |
| 760 | DF | SPECIMEN STRESS OR STRAIN, OR TESTING BY STRESS OR STRAIN APPLICATION {12} |
| 104 | DF | SURFACE AND CUTTING EDGE TESTING {1} |
| 112 | DF | POWER PLANT OR UNIT EFFICIENCY {2} |
| 116 | DF | MOTOR AND ENGINE TESTING {6} |
| 121 | DF | BRAKE TESTING {6} |
| 862 | DF | DYNAMOMETERS {5} |
| 146 | DF | TIRE, TREAD OR ROADWAY {1} |
| 147 | DF | WIND TUNNEL: AERODYNAMIC WING AND PROPELLER STUDY |
| 148 | DF | MODEL BASIN AND TESTING TANK |
| 149 | DF | VOLUMETRIC CONTENT MEASURING |
| 150 R | DF | COATING MATERIAL: INK ADHESIVE AND/OR PLASTIC {1} |
| 152.01 | DF | BOREHOLE OR DRILLING (E.G., DRILL LOADING FACTOR, DRILLING RATE, RATE OF FLUID FLOW) {6} |
| 156 | DF | STATISTICAL RECORD VERIFYING |
| 157 | DF | RECORD STRIP SPROCKET HOLE TESTING |
| 158 | DF | HOISTING CABLE AND ROPE |
| 159 | DF | SHEET, WOVEN FABRIC OR FIBER {1} |
| 161 | DF | SPRING TESTING |
| 162 | DF | TOOTHED GEAR |
| 163 | DF | COIN |
| 164 | DF | MINER'S LAMP |
| 167 | DF | ORDNANCE AND PROJECTILE |
| 168 | DF | BLOWER, PUMP, AND HYDRAULIC EQUIPMENT |
| 169 | DF | FLOUR, DOUGH, OR BREAD |
| 172 | DF | ORTHOPEDIC PRESSURE DISTRIBUTION |
| 178 R | DF | NAVIGATION {5} |
| 170.01 | DF | FLUID FLOW DIRECTION (E.G., WIND SOCK, WEATHER VANE, ETC.) {4} |
| 170.16 | DF | METEOROLOGY {6} |
| 170.29 | DF | OCEANOLOGY (E.G., OCEANS, RIVERS, OR LAKES) {4} |
| 861 | DF | VOLUME OR RATE OF FLOW {23} |
| 290 R | DF | LIQUID LEVEL OR DEPTH GAUGE {13} |
| 379.01 | DF | MUSCULAR FORCE (E.G., STRENGTH TESTING, EXERCISING OR TRAINING EFFORT, ETC.) {5} |
| 382 R | DF | GRAVITATIONAL DETERMINATION {2} |
| 488 | DF | SPEED, VELOCITY, OR ACCELERATION {29} |
| 384 | DF | BAROMETER (E.G., ALTIMETER) {2} |
| 700 | DF | FLUID PRESSURE GAUGE {20} |
| 863 | DF | SAMPLER, SAMPLE HANDLING, ETC. {11} |
| 426 | DF | MEASURING VESSEL {2} |
| 430 | DF | INSTRUMENT MECHANISM DAMPENING |
| 431 | DF | INSTRUMENT CASING |
| 865 | DF | MASS |
| 865.1 | DF | HUMAN STRESS LIMIT (E.G., DECOMPRESSION GAUGE FOR DIVERS) |
| 865.2 | DF | HYDRAULIC ALTIMETER |
| 865.3 | DF | TESTING BY IMPARTING MOTION |
| 865.4 | DF | ANALYZING BODILY MOVEMENT (E.G., SKILLS OR KINETICS OF HANDWRITING) |
| 865.5 | DF | PARTICLE SIZE |
| 865.6 | DF | SIMULATED ENVIRONMENT (E.G., TEST CHAMBERS) |
| 865.7 | DF | TOUCH OR TASTE |
| 865.8 | DF | INSPECTING |
| 865.9 | DF | TESTING OF APPARATUS |
| 866 | DF | TESTING OF MATERIAL |
| 866.1 | DF | INSTRUMENT MECHANISM OR TRANSMISSION {1} |
| 866.3 | DF | DISPLAY OR DISPLAY DEVICE DETAILS |
| 866.4 | DF | SPECIMEN MODEL OR ANALOG |
| 866.5 | DF | PROBE OR PROBE MOUNTING |
| 432.1 | DF | MISCELLANEOUS |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTIONS |
| | ****************************** |
| 900 | DF | AUTOMATIC GAIN CONTROL |
| 901 | DF | DIGITAL READOUT |
| | ****************************** |
| | DIGESTS |
| | ****************************** |
| DIG 1 | DF | Vibration |
| DIG 2 | DF | Magnetostrictive |
| DIG 3 | DF | Hall effect |
| DIG 4 | DF | Piezoelectric |
| DIG 5 | DF | Liquid levels with magnetic transmission |
| DIG 8 | DF | Fluid circuits |
| DIG 9 | DF | Molten metal samplers |
| DIG 10 | DF | Instrument mechanisms with acceleration compensation |
| DIG 11 | DF | Photoelectric cell |
| | ****************************** |
| | FOREIGN ART COLLECTIONS |
| | ****************************** |
| FOR 100 | DF | BORE HOLE AND DRILLING STUDY (73/151) {3} |
