# US 10,483,018 B1 · Transmission cable and power supply device having transmission cable > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,018 B1 - Document ID: US10483018B1 - Status: Granted - Kind: B1 - Application number: 16/051,843 - Filed: 2018-08-01 - Granted: 2019-11-19 - Earliest claimed: 2018-06-29 - Assignees: Chicony Power Technology Co., Ltd. - Applicants: Chicony Power Technology Co., Ltd. - Inventors: Huan-Chih Chiu - Web page: https://patentgrep.com/patent/US10483018B1 ## CPC - G01R 31/54: Testing for continuity - G01R 27/26: Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants {; Measuring impedance or related variables} - H01B 7/32: with arrangements for indicating defects, e.g. breaks or leaks - H02H 3/00: Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection (specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H7/00; systems for change-over to standby supply H02J9/00 ){; integrated protection (for motors H02H7/0822)} - H02H 3/26: responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H01R 13/6691: {with built-in signalling means (H01R13/717 takes precedence)} - H01R 13/70: with built-in switch - H01R 13/717: with built-in light source - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract A transmission cable includes a cable body, a return control circuit, and a determining circuit. The cable body has a first end and a second end, and the cable body includes a first wire and a second wire. The return control circuit is located at the second end and configured to selectively electrically connect the first wire to the second wire. The determining circuit is located at the first end, and configured to determine an electrical property of the second wire and output a first signal when the foregoing electrical property is less than a threshold. ## Claims ### Claim 1 A transmission cable, comprising: a cable body, having a first end and a second end, the cable body comprising a power supply wire and a signal wire; a return control circuit, located at the second end, and configured to selectively electrically connect the power supply wire to the signal wire; and a determining circuit, located at the first end, and configured to determine a return voltage of the signal wire and output a first signal when the return voltage is less than a threshold. ### Claim 2 (depends on 1) The transmission cable according to claim 1, wherein the return control circuit comprises a manual switch, and the manual switch selectively electrically connects the power supply wire to the signal wire. ### Claim 3 (depends on 1) The transmission cable according to claim 1, wherein the return control circuit comprises a first switch and a first time delay circuit, and the first switch is configured to selectively electrically connect the power supply wire to the signal wire, wherein when the first time delay circuit is actuated, the first time delay circuit delays a first time period, and then turns on the first switch to electrically connect the power supply wire to the signal wire. ### Claim 4 (depends on 3) The transmission cable according to claim 3, wherein the cable body further comprises a ground wire, the first switch is a transistor, the transistor has a gate, a source, and a drain, the first time delay circuit comprises a first resistor and a first capacitor, the drain is electrically connected to the power supply wire, the source is electrically connected to the signal wire, the first resistor has one end electrically connected to the power supply wire and the other end electrically connected to the gate, and the first capacitor has one end electrically connected to the gate and the other end electrically connected to the ground wire. ### Claim 5 (depends on 4) The transmission cable according to claim 4, wherein the determining circuit comprises a comparator, configured to compare a return voltage of the signal wire with a threshold voltage and output a voltage level signal when the return voltage is less than the threshold voltage. ### Claim 6 (depends on 5) The transmission cable according to claim 5, wherein the determining circuit further comprises a controller and a light-emitting element, wherein the controller is configured to selectively actuate the light-emitting element based on the voltage level signal. ### Claim 7 (depends on 6) The transmission cable according to claim 6, further comprising an energy saving circuit, wherein the energy saving circuit is located at the second end and is configured to: when actuated, delays a second time period, and then turn off the first switch to disconnect the electrical connection between the power supply wire and the signal wire, the second time period being greater than the first time period. ### Claim 8 (depends on 5) The transmission cable according to claim 5, wherein the determining circuit further comprises a controller and a buzzer, wherein the controller is configured to selectively actuate the buzzer based on the voltage level signal. ### Claim 9 (depends on 8) The transmission cable according to claim 8, further comprising an energy saving circuit comprising a second switch and a second time delay circuit, wherein the second switch is configured to selectively turn off the first switch, and when the second time delay circuit is actuated, the second time delay circuit delays the second time period, and then actuates the second switch to turn off the first switch. ### Claim 10 (depends on 4) The transmission cable according to claim 4, wherein the determining circuit comprises a controller and a light-emitting element, wherein the controller is configured to calculate a voltage difference between an output voltage of the power supply wire and a return voltage of the signal wire and output a voltage level signal when the voltage difference is greater than a preset voltage, and the controller is further configured to selectively actuate the light-emitting element based on the voltage level signal. ### Claim 11 A power supply device, comprising: a power supply circuit, configured to provide a power supply and comprising a determining circuit; a cable body, having a first end and a second end, the cable body comprising a power supply wire, a signal wire, and a ground wire, and the power supply circuit providing the power supply to the first end corresponding to the power supply wire and the ground wire; and a return control circuit, located at the second end, and configured to selectively electrically connect the power supply wire to the signal wire, wherein the determining circuit is configured to determine a return voltage of the signal wire and output a first signal when the return voltage is less than a threshold. ### Claim 12 (depends on 11) The power supply device according to claim 11, wherein the return control circuit comprises a manual switch, and the manual switch selectively electrically connects the power supply wire to the signal wire. ### Claim 13 (depends on 11) The power supply device according to claim 11, wherein the return control circuit comprises a first switch and a first time delay circuit, wherein the first switch is configured to selectively electrically connect the power supply wire to the signal wire, and when the first time delay circuit is actuated, the first time delay circuit delays a first time period, and then turns on the first switch to electrically connect the power supply wire to the signal wire. ### Claim 14 (depends on 13) The power supply device according to claim 13, wherein the first switch is a transistor, the transistor has a gate, a source, and a drain, the first time delay circuit comprises a first resistor and a first capacitor, the drain is electrically connected to the power supply wire, the source is electrically connected to the signal wire, the first resistor has one end electrically connected to the power supply wire and the other end electrically connected to the gate, and the first capacitor has one end electrically connected to the gate and the other end electrically connected to the ground wire. ### Claim 15 (depends on 14) The power supply device according to claim 14, wherein the determining circuit comprises a controller and a light-emitting element, wherein the controller is configured to calculate a voltage difference between an output voltage of the power supply wire and a return voltage of the signal wire and output a voltage level signal when the voltage difference is greater than a preset voltage, and the controller is further configured to selectively actuate the light-emitting element based on the voltage level signal. ### Claim 16 (depends on 14) The power supply device according to claim 14, wherein the determining circuit comprises a comparator, configured to compare a return voltage of the signal wire with a threshold voltage and output a voltage level signal when the return voltage is less than the threshold voltage. ### Claim 17 (depends on 16) The power supply device according to claim 16, wherein the determining circuit further comprises a controller and a light-emitting element, wherein the controller is configured to selectively actuate the light-emitting element based on the voltage level signal. ### Claim 18 (depends on 17) The power supply device according to claim 17, further comprising an energy saving circuit, wherein the energy saving circuit is located at the second end and is configured to: when actuated, delays a second time period, and then turn off the first switch to disconnect the electrical connection between the power supply wire and the signal wire, the second time period being greater than the first time period. ### Claim 19 (depends on 18) The power supply device according to claim 18, wherein the energy saving circuit comprises a second switch and a second time delay circuit, wherein the second switch is configured to selectively turn off the first switch, and when the second time delay circuit is actuated, the second time delay circuit delays the second time period, and then turns off the first switch. ### Claim 20 (depends on 11) The power supply device according to claim 11, wherein the power supply circuit selectively outputs or does not output the power supply according to the first signal.