Invention Grant
- Patent Title: Three-way switching circuit having delay for inrush current protection
- Patent Title (中): 三路开关电路具有浪涌电流保护延时
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Application No.: US14832610Application Date: 2015-08-21
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Publication No.: US09307622B2Publication Date: 2016-04-05
- Inventor: Robert William Lenig
- Applicant: Lutron Electronics Co., Inc.
- Applicant Address: US PA Coopersburg
- Assignee: LUTRON ELECTRONICS CO., INC.
- Current Assignee: LUTRON ELECTRONICS CO., INC.
- Current Assignee Address: US PA Coopersburg
- Agency: Condo Roccia Koptiw LLP
- Main IPC: H05B33/08
- IPC: H05B33/08 ; H05B37/02

Abstract:
A three-way load control device may be coupled to a circuit including an AC power source, an electrical load, and an external single-pole double-throw (SPDT) three-way switch. The load control device may include a three-way switching circuit comprising an internal SPDT switch, a relay coupled to the internal SPDT switch, a turn-on delay circuit responsive to a voltage at a movable contact of the internal SPDT switch, and a turn-off delay circuit responsive to voltages at fixed contacts of the internal SPDT switch. The turn-on delay circuit renders the relay conductive after a turn-on delay from when either the internal SPDT switch or the external three-way switch is actuated to turn the electrical load on. The turn-off delay circuit renders the relay non-conductive after a turn-off delay from when either the internal SPDT switch or the external three-way switch is actuated to turn off the electrical load.
Public/Granted literature
- US20160057841A1 THREE-WAY SWITCHING CIRCUIT HAVING DELAY FOR INRUSH CURRENT PROTECTION Public/Granted day:2016-02-25
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