US Patent No. 10,219,353

Z-WAVE MULTI-WAY SWITCHES


Patent No. 10,219,353
Issue Date February 26, 2019
Title Z-wave Multi-way Switches
Inventorship Zbigniew Lorenz, Mt. Olive, NJ (US)
Assignee Lorenz High Definition, LLC, Flanders, NJ (US)

Claim of US Patent No. 10,219,353

1. A smart switch adapted to be electrically connected to a circuit comprising an AC power source, an AC hot line, an AC neutral line, an electrical load, and a three-way remote switch, the remote switch having a first remote terminal, a second remote terminal and a common terminal that is electrically connected to the electrical load, the remote switch further having a first position, in which the common terminal is electrically connected to the first remote terminal, and a second position, in which the common terminal is electrically connected to the second remote terminal, the smart switch comprisinga line terminal adapted to be electrically connected to the AC hot line;
a neutral terminal adapted to be electrically connected to the AC neutral line;
a load terminal adapted to be electrically connected to the first remote terminal of the remote switch;
a traveler terminal adapted to be electrically connected to the second remote terminal of the remote switch;
a conductive control system, comprising a relay switching circuit, wherein the conductive control system has two control states, consisting of a first control state, in which the line terminal is electrically connected to the load terminal, and a second control state, in which the line terminal is electrically connected to the traveler terminal, and wherein the relay switching circuit comprises an electromagnetic relay switch electrically connected between the line terminal and the load terminal and between the line terminal and the traveler terminal, and wherein the relay switching circuit is switchable between the two control states, and wherein in the first control state, the relay switch electrically connects the line terminal to the load terminal and electrically disconnects the line terminal from the traveler terminal, and wherein in the second control state the relay switch electrically connects the line terminal to the traveler terminal and electrically disconnects the line terminal from the load terminal;
one or more current sensing elements electrically connected between the line terminal and the neutral terminal, or between the conductive control system and either or both of the load terminal and the traveler terminal, wherein the current sensing elements are operable to detect a status of a load current flowing through the remote switch to the electrical load and to transmit a load current detection signal;
a radio frequency (RF) Z-wave transceiver operable to receive remote RF control commands, and to electrically transmit the control commands, and to transmit RF status messages that report the status of the load current and the control state of the conductive control system;
a switch controller electrically connected to the Z-wave transceiver and to the current sensing elements and to the conductive control system, wherein the switch controller is operable, in response to the control commands from the Z-wave transceiver and to the load current detection signal from the current sensing elements, to switch, through a control driver circuit, the control states of the conductive control system from the first control state to the second control state, or from the second control state to the first control state; and
a power supply, having an AC input side and a DC output side, wherein the AC input side is electrically connected between the line terminal and the neutral terminal, and wherein the DC output side is electrically connected to the switch controller and the Z-wave transceiver, and wherein the power supply converts and AC input from the AC input side to a DC output on the DC output side, and wherein the DC output side of the power supply is operable to supply the DC output to power the switch controller and the Z-wave transceiver.