The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2016
Filed:
Jan. 13, 2014
Litex Industries, Limited, Grand Prairie, TX (US);
Donald J Ladanyi, Westlake, OH (US);
Georgios V Lazaridis, Piraeus, GR;
LITEX INDUSTRIES, LIMITED, Grand Prairie, TX (US);
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.