Invention Grant
- Patent Title: Illuminated doorbell chime system
- Patent Title (中): 照明门铃铃系统
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Application No.: US14154174Application Date: 2014-01-13
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Publication No.: US09282665B1Publication Date: 2016-03-08
- Inventor: Donald J Ladanyi , Georgios V Lazaridis
- Applicant: LITEX INDUSTRIES, LIMITED
- Applicant Address: US TX Grand Prairie
- Assignee: LITEX INDUSTRIES, LIMITED
- Current Assignee: LITEX INDUSTRIES, LIMITED
- Current Assignee Address: US TX Grand Prairie
- Agency: Handley Law Firm, PLLC
- Agent Mark W. Handley
- Main IPC: H01H13/02
- IPC: H01H13/02 ; H05K7/00

Abstract:
An illuminated doorbell chime system is disclosed having a chime coil and LED lights. A chime control circuit has a power supply unit, an LED driver and a chime driver. The power supply unit is connected to the LED lights and the chime coil. The LED driver is connected to the LED lights. The chime driver is connected to the chime coil. A door switch selectively applies power to the power supply unit. The LED driver has a bipolar junction transistor, a base Zener diode, and a voltage divider. The chime driver has a Mosfet transistor, a gate resistor, a gate capacitor, and a gate Zener diode. The LED driver and the chime driver are interconnected, with a cathode of the gate Zener diode connected to the collector of the bipolar junction transistor, and a cathode of the base Zener diode connected to the drain of the Mosfet transistor.
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