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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 338 | ELECTRICAL RESISTORS |
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1 | COHERER TYPE |
2 | STRAIN GAUGE TYPE |
3 | With temperature compensation |
4 | Fluid- or gas pressure-actuated |
5 | Dynamometer type |
6 | Extensometer type |
7 | RESISTANCE VALUE TEMPERATURE-COMPENSATED |
11 | REFLECTOR DIRECTS HEAT ON ELEMENT |
12 | MOVABLE MAGNET ACTUATES RESISTOR THROUGH HOUSING OR PARTITION |
13 | RESISTANCE VALUE RESPONSIVE TO A CONDITION |
14 | Plural conditions |
15 | Photoconductive (e.g., light sensitive) |
16 | With vibration control |
17 | Plural resistance elements (e.g., mosaic) |
18 | Infrared radiation |
19 | With transparent housing |
20 | Current and/or voltage (e.g., ballast resistor) |
25 | Ambient temperature |
26 | Cable or tape type (e.g., fire-detecting cable) |
27 | Liquid contact or element |
28 | Probe type |
31 | Mechanically adjustable or variable |
32R | Magnetic field or compass (e.g., Hall effect type) |
33 | Float actuator |
34 | Gas, vapor, or moisture absorbing or collecting |
36 | Fluid- or gas pressure-actuated |
37 | Vehicle tire inflation |
38 | Liquid resistance element or contact |
39 | Piston |
40 | Bourdon tube |
41 | Bellows or capsule |
42 | Diaphragm |
43 | Gravity stabilized or inertia actuator |
47 | Force-actuated |
48 | PLURAL SEPARATE DIVERSE RESISTORS |
49 | SHUNT TYPE |
50 | MOUNTED ON WHEELS OR VEHICLE |
51 | WITH HEAT DISSIPATING PROJECTIONS (E.G., VANES) |
53 | WITH COOLING GAS OR LIQUID CIRCULATION |
54 | Element granular, powdered, or stacked between terminals |
55 | With cooling liquid circulation |
57 | Vented or ventilating casing or housing |
58 | Ventilated helical or zigzag element |
59 | WITH HEAT-STORING |
60 | WITH CAPACITY-REDUCING |
61 | WITH INDUCTANCE-REDUCING |
64 | WITH ELECTRICAL SHIELD |
66 | IGNITION INTERFERENCE SUPPRESSOR TYPE |
67 | WITH DIVERSE NONELECTRICAL DEVICE (E.G., MECHANICAL OR CHEMICAL) |
68 | MECHANICALLY VARIABLE (E.G., RHEOSTAT) |
69 | Musical instrument playing key actuated |
70 | In or on lamp socket |
71 | Resistor surfaces pressed together (e.g., compressible type) |
72 | Resistor with intervening connector between contact and element (e.g., taps) |
73 | Resistor with contact angularly slidable on element |
74 | Resistor with contact rectilinearly slidable on element |
75 | With resistor cleaner |
76 | Interchangeable resistors of different resistance value |
77 | Plug boxes |
78 | With current reversing (e.g., reversing rheostat) |
79 | With element winding and/or unwinding |
80 | Liquid resistance element |
81 | Electrode separable from liquid element for switching |
82 | Adjustable insulating barrier between electrodes |
83 | Variable electrode separation |
86 | Level of liquid element adjustable on electrodes (e.g., electrodes move up and down in element) |
87 | Contact adjustably inserted into resistance element (e.g., penetrating type) |
89 | Mathematical function (e.g., sine-cosine potentiometer) |
92 | Resistance element adjustably short-circuited |
93 | Compressible spring type |
94 | Liquid contact |
95 | With intervening structure between element and short-circuiting means (e.g., taps) |
96 | Spring contact strip progressively pressed along element |
97 | Unitary movable contact electrically bridges resistance portions |
98 | With motion or vibration damping means (e.g., dashpots) |
99 | Surfaces pressed together (e.g., compressible type) |
100 | Granular |
101 | Pile type |
102 | With contactor moving along pile |
103 | With electromagnetic operator (e.g., electric motor) |
104 | Force applied at both ends of pile |
105 | With diaphragm-type biasing spring |
106 | With initial pressure adjustment |
107 | With electromagnetic holder |
108 | Pedal- or treadle-operated |
109 | With initial pressure adjustment |
110 | With switch actuated by resistor actuator |
111 | With intervening conducting structure |
112 | Contact surface area of piles variable |
113 | With resilient pressure-applying linkage |
114 | Deformable |
115 | Element in piled or stacked layers |
116 | With electromagnetic operator (e.g., electric motor) |
117 | Slidable coextensive helical and linear contacts |
118 | Movable contact electrically adjustable over length of resistance element |
119 | With contact position indicating lamp |
120 | Additional resistor adjustably shunts part of resistance element (e.g., varifunction type |
121 | With nonlinearity correction |
122 | Coarse and fine resistance elements |
125 | Unitary movable contact electrically bridges plural resistance elements |
128 | Plural |
129 | Sequentially operated |
130 | Ganged |
131 | Resistors individually adjustable |
132 | Resistors in tandem along rotary shaft or coupling |
133 | Rectilinearly operated |
134 | Individually operated concentric shaft type |
135 | With zero setting or phasing |
136 | Contact clamped on resistance element |
137 | Plural contacts adjustable over single resistance element |
138 | Element tapered |
139 | Portion of element shorted |
140 | With intervening connector between contact and element (e.g., taps) |
141 | Helical or wound |
142 | Element forms a coating |
143 | Contact moves along turns of helical resistance element |
144 | Contact lifts element from core |
145 | Helical resistance element moves |
146 | With helical collector parallel to helical element |
147 | Resistor formed as a flat spiral |
148 | With helical screw for moving the contact |
149 | With contact stop |
150 | Resistance element moves |
153 | Contact operated by pedal or treadle |
154 | With a flexible conductive strip separating the movable contact and the resistance element or taps |
155 | Contact rocks along element or taps |
156 | With liquid contact |
157 | Contact rolls along element or taps |
159 | With heat conducting or distributing path |
160 | Contact slides along in contact with element |
161 | With element casing open over contact track |
162 | Contact angularly slidable |
163 | With knob forming casing or covering |
164 | Hermetically sealed housing |
165 | With elongated rectilinear resistance element |
166 | With removable actuating shaft or key |
167 | Spring-loaded contact |
168 | With flexible lead-in to contact |
169 | Contact pressure adjustable |
170 | With contact biasing spring on contact arm or carrier |
171 | With plural contact portions |
172 | With switching |
174 | With collector ring |
176 | Contact rectilinearly slidable |
184 | With housing |
185 | With intervening connector between contact and element (e.g., taps) |
195 | Resistance value varied by removing or adding material |
196 | With resistor actuator position indicator |
197 | With support |
198 | With switch actuated by resistor actuator |
199 | With housing |
200 | With switch |
202 | MOVABLE CONTACT STRUCTURE |
203 | READILY SEVERABLE INTO INDEPENDENT RESISTORS |
204 | ELEMENT IN LAYERS PILED OR STACKED BETWEEN TERMINALS |
206 | EXPANDED METAL TYPE |
207 | ELEMENT AND BASE PERMANENTLY FOLDED OR ROLLED |
208 | MESH, WOVEN, OR BRAIDED RESISTANCE ELEMENT |
209 | EXTENSIBLE |
210 | FLEXIBLE OR FOLDING |
215 | WITH SWITCH |
216 | IN COAXIAL TRANSMISSION LINE OR WAVE GUIDE |
217 | TAPERED ELEMENT |
219 | IN OR ON LAMP SOCKET OR BASE |
220 | IN DETACHABLE ELECTRICAL CONNECTOR |
221 | DETACHABLE PLUG-TYPE RESISTOR UNIT |
222 | WITH LIQUID ELEMENT |
223 | GRANULAR OR POWDERED ELEMENT |
226 | INCASED, EMBEDDED, OR HOUSED |
227 | With resistance value indicator |
228 | Casing extends through plate |
229 | Probe type |
230 | Metal casing or housing cast around element |
231 | In liquid |
232 | Casing or housing readily openable and/or separable from element |
234 | With gaseous or vacuum spacing between element and casing or housing |
238 | Element inpowdered insulation with outer metallic sheath |
243 | Element in insulation with outer metallic sheath |
244 | Insulation coated on conducting liner |
245 | Entire insulation or sheath formed as a coating |
246 | With insulation and sheath external and internal to element |
247 | Plural part sheath |
250 | Insulation formed and hardened in situ (e.g., molded) |
251 | Sheath embraces or folds over insulation |
252 | Element embedded or enclosed in groove or recess |
254 | Flattened resistance element between flat layers |
256 | Casing or housing formed in plural layers external to element |
258 | Resistance element formed as a coating on interior of casing or housing |
259 | Wound, braided, or woven casing or housing |
260 | Plural resistors |
262 | Casing or housing formed as a coating |
267 | Helical or wound element |
268 | Preformed sleeve engaging over element |
269 | Casing or housing formed on and hardened on resistor (e.g., molded) |
270 | Element coiled on a core |
271 | Terminal forms casing or housing |
272 | Terminal or lead surrounds and secured to casing or housing |
273 | Terminal or lead extends into end of elongated casing or housing |
275 | Casing or housing formed on and hardened on resistor (e.g., molded) |
276 | Terminal or lead extends through casing or housing wall |
277 | WITH PROTECTING STRUCTURE SPACED FROM ELEMENT OR TERMINAL |
278 | EDGEWISE COILED HELICAL STRIP RESISTANCE ELEMENT |
279 | RIBBON RESISTANCE ELEMENT BENT OR CURVED ON FLAT SIDE |
283 | ZIGZAG OR SINUOUS RESISTANCE ELEMENT |
284 | Element includes integral stiffening structure |
285 | Element extends along groove in base |
286 | Helical |
287 | Compound or multiple zigzag |
289 | Element includes conductive jumpers or spacers |
290 | Element projects in or through an opening or a slot in a support or frame |
291 | With transverse element stiffening or reinforcing rod or strip |
292 | Element forms a coating |
293 | Planar |
294 | Cylindrical |
295 | PLURAL RESISTANCE ELEMENTS CONNECTED BY A JUMPER OR SPACER |
296 | HELICAL OR WOUND RESISTANCE ELEMENT |
297 | Flat spiral winding |
298 | Compound helix or winding |
299 | Plural supported helices or windings |
300 | Element forms a coating |
301 | Element coiled on flat or ribbon base |
302 | Element coiled on cylindrical or prismatic core |
304 | Element on frame or support |
306 | WITH BASE EXTENDING ALONG RESISTANCE ELEMENT |
307 | Resistance element and/or terminals printed or marked on base |
308 | Resistance element coated on base |
310 | Resistance element extends through base |
311 | Resistance element mounted in a groove in base |
312 | Terminal extends in or through base |
313 | Terminal embraces base |
314 | Resistance element and base formed in layers |
315 | WITH MOUNTING OR SUPPORTING MEANS |
316 | Compensates for or permits resistor |
317 | Threading or projecting through the support |
318 | Extending between supports |
320 | Plural resistors |
321 | RESISTANCE ELEMENT CORES AND FRAMES |
322 | WITH TERMINAL |
323 | Terminal tapped on resistance element |
324 | Diverse terminals |
325 | With three or more terminals |
326 | Terminals adjacent (e.g., looped resistor) |
327 | Terminal coated on resistance element |
328 | Terminal and resistance element disposed in flat layers |
329 | Welded or soldered |
330 | Terminal and resistance element integral |
331 | Resistance element surrounds terminal |
332 | Terminal embraces or surrounds resistance element |
333 | PARTICULAR CONFIGURATION AND/OR DIMENSION |
334 | MISCELLANEOUS |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
DIGESTS | ||
DIG1 | WORM GEAR DRIVE |
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