# US 11,906,941 B2 · Intelligent three-way switch systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,941 B2 - Document ID: US11906941B2 - Status: Granted - Kind: B2 - Application number: 17/677,967 - Filed: 2022-02-22 - Published: 2023-08-24 - Granted: 2024-02-20 - Earliest claimed: 2022-02-22 - Applicants: Mitchell M. Jiang - Inventors: Mitchell M. Jiang - Web page: https://patentgrep.com/patent/US11906941B2 ## CPC - G05B 15/02: electric - H05B 47/10: Controlling the light source - G05B 2219/2642: Domotique, domestic, home control, automation, smart house - H05B 47/19: via wireless transmission - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract Present invention relates to intelligent three-way switch system having intelligent three-way master switch, intelligent three-way slave switch, and load. In certain embodiments, intelligent three-way master switch includes a DC power supply, a live wire relay, and a switch control unit, and intelligent three-way slave switch includes a switch control unit. The DC power supply provides low voltage DC power to live wire relay and switch control units. When at least one of switch control unit of the intelligent three-way master switch and switch control unit of the intelligent three-way slave switch receives switch control instructions, the switch control unit generates a negative pulse at the switch control unit first terminal, and the negative pulse is transmitted to the live wire relay. The live wire relay detects the negative pulse generated at the switch control unit first terminal and turns “ON” or “OFF” the electrical power to the load. ## Claims ### Claim 1 An intelligent three-way master switch, comprising: a master switch first live terminal, a master switch second live terminal, a master switch traveler terminal, a master switch neutral terminal, and a master switch ground terminal; a switch control unit, wherein the switch control unit receives one or more switch control instructions and controls a live wire relay; and the live wire relay, wherein the live wire relay detects a negative pulse from the switch control unit, and turns “ON” or “OFF” an electrical power between the master switch first live terminal and the master switch second live terminal; a live input terminal selector, wherein the live input terminal selector comprises a first input terminal, a second input terminal, and an output terminal, wherein when an electrical power input is connected through a three-wire electrical cable, the first input terminal is connected to the output terminal, and when the electrical power input is connected through a four-wire electrical cable, the second input terminal is connected to the output terminal, and a direct current (DC) power supply, wherein the DC power supply receives the electrical power through the live input terminal selector, and provides a low DC voltage for the operation of an intelligent three-way master switch. ### Claim 2 (depends on 1) The intelligent three-way master switch according to claim 1, wherein when the electrical power input is connected through the three-wire electrical cable to the master switch first live terminal, the master switch neutral terminal, and the master switch ground terminal respectively, an electrical power output is connected through the four-wire electrical cable to the master switch second live terminal, the master switch traveler terminal, the master switch neutral terminal, and the master switch ground terminal respectively. ### Claim 3 (depends on 2) The intelligent three-way master switch according to claim 2, wherein when the electrical power input is connected through the four-wire electrical cable to the master switch second live terminal, the master switch traveler terminal, the master switch neutral terminal, and the master switch ground terminal respectively, the electrical power output is connected through the three-wire electrical cable to the master switch first live terminal, the master switch neutral terminal, and the master switch ground terminal respectively. ### Claim 4 (depends on 3) The intelligent three-way master switch according to claim 3, wherein the DC power supply comprises: a live wire terminal connected to a live wire of the electrical power input, and a neutral wire terminal connected to neutral wire of the electrical power input, and a low voltage DC output terminal, wherein the low voltage DC output terminal provides the low DC voltage for an operation of the intelligent three-way master switch. ### Claim 5 (depends on 4) The intelligent three-way master switch according to claim 4, wherein the switch control unit comprises: a push button switch; a Wi-Fi controlled switch; a light sensor switch; a motion sensor switch; a touch panel switch; and any combination thereof. ### Claim 6 (depends on 5) The intelligent three-way master switch according to claim 5, wherein the switch control unit comprises: a switch control unit first terminal and a switch control unit second terminal, and the switch control unit first terminal is connected to the low voltage DC output terminal, wherein when the switch control unit receives the one or more switch control instructions, the switch control unit generates the negative pulse at the switch control unit first terminal. ### Claim 7 (depends on 6) The intelligent three-way master switch according to claim 6, wherein the live wire relay comprises: DC control terminals having a positive DC control terminal and a negative DC control terminal, and live wire switch terminals having a first live wire terminal and a second live wire terminal, wherein when the live wire relay is in an “ON” state, the first live wire terminal and the second live wire terminal are connected, and when the live wire relay is in an “OFF” state, the first live wire terminal and the second live wire terminal are disconnected. ### Claim 8 (depends on 7) The intelligent three-way master switch according to claim 7, wherein when the switch control unit receives the one or more switch control instructions, and the negative pulse at the switch control unit first terminal is generated, the live wire relay detects the negative pulse generated and changes the state, when the live wire relay is in the “ON” state, the first live wire terminal and the second live wire terminal are disconnected, and when the live wire relay is in the “OFF” state, the first live wire terminal and the second live wire terminal are connected. ### Claim 9 An intelligent three-way slave switch, comprising: a slave switch first live terminal, a slave switch second live terminal, a slave switch traveler terminal, a slave switch neutral terminal, and a slave switch ground terminal; and a switch control unit, wherein the switch control unit comprises: a switch control unit first terminal and a switch control unit second terminal; wherein the switch control unit first terminal is connected to the slave switch traveler terminal to receive a low voltage DC power supply, wherein when the switch control unit receives one or more switch control instructions, the switch control unit generates a negative pulse at the switch control unit first terminal and the negative pulse is sent to an intelligent three-way master switch to turn “ON” or “OFF” an electrical power supply through the slave switch traveler terminal. ### Claim 10 (depends on 9) The intelligent three-way slave switch according to claim 9, wherein when an electrical power input is connected through a three-wire electrical cable to the slave switch first live terminal, the slave switch neutral terminal, and the slave switch ground terminal respectively, the electrical power output is connected through a four-wire electrical cable to the slave switch second live terminal, the slave switch traveler terminal, the slave switch neutral terminal, and the slave switch ground terminal respectively. ### Claim 11 (depends on 10) The intelligent three-way slave switch according to claim 10, wherein when the electrical power input is connected through the four-wire electrical cable to the slave switch second live terminal, the slave switch traveler terminal, the slave switch neutral terminal, and the slave switch ground terminal respectively, the electrical power output is connected through the three-wire electrical cable to the slave switch first live terminal, the slave switch neutral terminal, and the slave switch ground terminal respectively. ### Claim 12 (depends on 9) The intelligent three-way slave switch according to claim 9, wherein the switch control unit comprises: a push button switch; a Wi-Fi controlled switch; a light sensor switch; a motion sensor switch; a touch panel switch; and any combination thereof. ### Claim 13 An intelligent three-way switch system, comprising: an intelligent three-way master switch, wherein the intelligent three-way master switch comprises: a master switch first live terminal, a master switch second live terminal, a master switch traveler terminal, a master switch neutral terminal, a master switch ground terminal, a direct current (DC) power supply, a live wire relay, a switch control unit, and a live input terminal selector; an intelligent three-way slave switch, wherein the intelligent three-way slave switch comprises: a slave switch first live terminal, a slave switch second live terminal, a slave switch traveler terminal, a slave switch neutral terminal, a slave switch ground terminal, and a switch control unit; and a load, wherein the load comprises a load live terminal, a load neutral terminal, and a load ground terminal, and the intelligent three-way switch system controls an electrical power supply to the load, wherein the intelligent three-way master switch, the intelligent three-way slave switch, and the load are connected in serial, and the DC power supply provides DC power to the live wire relay, the switch control unit of the intelligent three-way master switch, and the switch control unit of the intelligent three-way slave switch for an operation of the intelligent three-way switch system. ### Claim 14 (depends on 13) The intelligent three-way switch system according to claim 13, wherein the intelligent three-way master switch connects to the electrical power input through a three-wire electrical cable; the intelligent three-way slave switch connects to the intelligent three-way master switch through a four-wire electrical cable; and the load connects to the intelligent three-way slave switch through the three-wire electrical cable. ### Claim 15 (depends on 13) The intelligent three-way switch system according to claim 13, wherein the intelligent three-way slave switch connects to the electrical power input through the three-wire electrical cable; the intelligent three-way master switch connects to the intelligent three-way slave switch through the four-wire electrical cable; and the load connects to the intelligent three-way master switch through the three-wire electrical cable. ### Claim 16 (depends on 13) The intelligent three-way switch system according to claim 13, wherein the DC power supply comprises: a live wire terminal connected to the live wire of the electrical power input, and a neutral wire terminal connected to neutral wire of the electrical power input, and a low voltage DC output terminal, wherein the low voltage DC output terminal provides the low DC voltage for the operation of the intelligent three -way switch system. ### Claim 17 (depends on 13) The intelligent three-way switch system according to claim 13, wherein the switch control unit comprises: a push button switch; a Wi-Fi controlled switch; a light sensor switch; a motion sensor switch; a touch panel switch; and any combination thereof. ### Claim 18 (depends on 13) The intelligent three-way switch system according to claim 13, wherein when at least one of the switch control unit of the intelligent three -way master switch and the switch control unit of the intelligent three-way slave switch receives one or more switch control instructions, the switch control unit generates a negative pulse at a switch control unit first terminal, and the live wire relay detects the negative pulse generated at the switch control unit first terminal and turns “ON” or “OFF” the electrical power to the load. ### Claim 19 (depends on 18) The intelligent three-way switch system according to claim 18, wherein the live wire relay comprises: DC control terminals having a positive DC control terminal and a negative DC control terminal, and live wire switch terminals having a first live wire terminal and a second live wire terminal, wherein when the live wire relay is in an “ON” state, the first live wire terminal and the second live wire terminal are connected, and when the live wire relay is in an “OFF” state, the first live wire terminal and the second live wire terminal are disconnected. ### Claim 20 (depends on 19) The intelligent three-way switch system according to claim 19, wherein when at least one of the switch control unit of the intelligent three -way master switch and the switch control unit of the intelligent three-way slave switch receives the one or more switch control instructions, and the negative pulse at the switch control unit first terminal is generated, the live wire relay detects the negative pulse generated and changes the state, when the live wire relay is in the “ON” state, the first live wire terminal and the second live wire terminal are disconnected, and when the live wire relay is in the “OFF” state, the first live wire terminal and the second live wire terminal are connected.