| IPC 7 English version |
| G08C-G08C02504 |
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| SECTION G – PHYSICS |
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| G 08 | SIGNALLING (indicating or display devices per se G09F; transmission of pictures H04N) |
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| G 08 C | TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS (fluid pressure transmission systems F15B; sensing members for specific physical variables, see the relevant subclasses, e.g. of G01, of H01; indicators or recorders, see the relevant subclasses, e.g. G01D, G09F; mechanical means for transferring the output of a sensing member into a different variable G01D 5/00; self-balancing bridges G01R; position control in general G05D 3/00; mechanical control systems G05G; systems for transmitting "on/off" signals only, systems for transmitting alarm conditions G08B; order telegraph systems G08B 9/00; generating electric pulses H03K; coding, decoding or code conversion, in general H03M; transmission of digital information H04L; selective calling from one station to another H04Q 9/00) [4] |
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| Subclass Index |
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| TRANSMISSION SYSTEMS IN GENERAL |
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| Electric; non-electric |
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| SYSTEMS FOR TRANSMITTING THE POSITION OF AN OBJECT |
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| ARRANGEMENTS CHARACTERISED BY THE METHOD OF TRANSMISSION |
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| Multiplex; use of a wireless electrical link |
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| PROCESSING SIGNALS |
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| Differentiating, delaying |
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| MONITORING, PREVENTING OR CORRECTING ERRORS |
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13/ | 00 | Arrangements for influencing the relationship between signals at input and output, e.g. differentiating, delaying (transferring the output of a sensing member to measuring arrangements giving results not yielding momentary value G01D 1/00; systems for control of position involving comparison between actual and desired values G05D 3/00; computing in general G06) |
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13/ | 02 | . | to yield a signal which is a function of two or more signals, e.g. sum, product |
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15/ | 00 | Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path (multiplex transmission in general H04J) |
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15/ | 02 | . | simultaneously, i.e. using frequency division |
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15/ | 04 | . | . | the signals being modulated on carrier frequencies |
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15/ | 06 | . | successively, i.e. using time division |
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15/ | 08 | . | . | the signals being represented by amplitude of current or voltage in transmission link |
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15/ | 10 | . | . | the signals being represented by frequencies or phase of current or voltage in transmission link |
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15/ | 12 | . | . | the signals being represented by pulse characteristics in transmission link |
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17/ | 00 | Arrangements for transmitting signals characterised by the use of a wireless electrical link [6] |
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17/ | 02 | . | using a radio link [6] |
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17/ | 04 | . | using magnetically coupled devices [6] |
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17/ | 06 | . | using capacity coupling [6] |
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19/ | 00 | Electric signal transmission systems (G08C 17/00 takes precedence) |
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19/ | 02 | . | in which the signal transmitted is magnitude of current or voltage (G08C 19/36, G08C 19/38 take precedence) |
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19/ | 04 | . | . | using variable resistance |
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19/ | 06 | . | . | using variable inductance |
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19/ | 08 | . | . | . | differentially influencing two coils |
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19/ | 10 | . | . | using variable capacitance |
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19/ | 12 | . | in which the signal transmitted is frequency or phase of ac |
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19/ | 14 | . | . | using combination of fixed frequencies |
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19/ | 16 | . | in which transmission is by pulses |
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19/ | 18 | . | . | using a variable number of pulses in a train |
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19/ | 20 | . | . | . | operating on dynamo-electric devices, e.g. step motor |
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19/ | 22 | . | . | by varying the duration of individual pulses |
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19/ | 24 | . | . | using time shift of pulses |
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19/ | 26 | . | . | by varying pulse repetition frequency |
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19/ | 28 | . | . | using pulse code |
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19/ | 30 | . | in which transmission is by selection of one or more conductors or channels from a plurality of conductors or channels (G08C 19/38 takes precedence) |
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19/ | 32 | . | . | of one conductor or channel |
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19/ | 34 | . | . | of a combination of conductors or channels |
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19/ | 36 | . | using optical means to convert the input signal (analogue/digital conversion per se H03M 1/00) |
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19/ | 38 | . | using dynamo-electric devices (operated by pulses G08C 19/20; dynamo-electric machines per se H02K) |
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19/ | 40 | . | . | of which only the rotor or the stator carries a winding to which a signal is applied, e.g. using step motor |
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19/ | 42 | . | . | . | having three stator poles |
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19/ | 44 | . | . | . | having more than three stator poles |
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19/ | 46 | . | . | of which both rotor and stator carry windings (having squirrel-cage rotor G08C 19/40) |
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19/ | 48 | . | . | . | being of the type with a three-phase stator and a rotor fed by constant-frequency ac, e.g. selsyn, magslip |
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21/ | 00 | Systems for transmitting the position of an object with respect to a predetermined reference system, e.g. tele-autographic system (converting the pattern of mechanical parameters, e.g. force or presence, into electrical signals G06K 11/00) [5] |
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23/ | 00 | Non-electric signal transmission systems, e.g. optical systems |
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23/ | 02 | . | using acoustic waves [6] |
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23/ | 04 | . | using light waves, e.g. infra-red [6] |
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23/ | 06 | . | . | through light guides, e.g. optical fibres [6] |
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25/ | 00 | Arrangements for preventing or correcting errors; Monitoring arrangements |
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25/ | 02 | . | by signalling back from receiving station to transmitting station |
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25/ | 04 | . | by recording transmitted signals |
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