# US 5,350,976 A · Fluorescent lamp starter

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- Number: US 5,350,976 A
- Document ID: US5350976A
- Status: Granted
- Kind: A
- Application number: 07/890,947
- Filed: 1992-05-29
- Granted: 1994-09-27
- Earliest claimed: 1991-05-31
- Assignees: Compania Kelmas S.A.
- Inventors: Norberto M. Mulieri
- Web page: https://patentgrep.com/patent/US5350976A

## CPC

- H05B 41/044: {for lamp provided with pre-heating electrodes}
- H05B 41/042: {using semiconductor devices}
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

An electronic starter for fluorescent lamps includes a hybrid solid state switch energized by a line and filtering unit connected in series with a pulse restrictor. The inputs of the hybrid solid state switch and the line and filtering unit are connected to a terminal. Also included in the starter is a pulse generator connected to the output of the hybrid solid state switch, the output of the pulse generator being connected to another terminal. The starter is connectable through such terminals to a power source, is parallel to the bridged terminals of a fluorescent lamp, and in series to the ballast of the lamp.

## Claims

### Claim 1

A fluorescent lighting system including:
an electronic starter comprising (a) a hybrid solid state switch energized by a line and filtering detector unit connected in series with a pulse restrictor, the inputs of said hybrid solid state switch and said line and filtering detector unit being connected to a first terminal, and (b) a pulse generator connected to the output of said hybrid solid state switch, the output of said pulse generator being connected to a second terminal;
a fluorescent light tube having bridged terminals, and
a ballast,
wherein said electronic starter is connectable through said first and second terminals to a power source, and connected in parallel to said bridged terminals and in series to said ballast.

### Claim 2 (depends on 1)

A system according to claim 1 which further comprises an indicator light connected to said line and filtering detector unit.

### Claim 3 (depends on 1)

A fluorescent lighting system according to claim 1, wherein said pulse generator is formed by a Triac-type, bi-directional module connected in series to a plurality of capacitors able to withstand the imposition of 650 volts thereon,
wherein said line and filtering detector unit is provided by a line detection stage comprising a voltage divider including resistors having indiscriminate polarity connected in series with a filtering stage of the resistive-capacitive type, and
wherein the output of said line and filtering detector unit is connected through a Diac to the gate of said Triac-type, bi-directional module.

### Claim 4 (depends on 1)

A fluorescent lighting system according to claim 1 wherein said electronic starter is connected to said power source, ballast and fluorescent light tube through two, single-strand wires.

### Claim 5

An electronic starter comprising:
a hybrid solid state switch energized by a line and filtering detector unit connected in series with a pulse restrictor, the inputs of said hybrid solid state switch and said line and filtering detector unit being connected to a first terminal, and
a pulse generator connected to the output of said hybrid solid state switch, the output of said pulse generator being connected to a second terminal.

### Claim 6 (depends on 5)

An electronic starter according to claim 5 which further comprises an indicator light connected to said line and filtering detector unit.

### Claim 7 (depends on 5)

An electronic starter according to claim 5 having connecting terminals compatible with conventional terminal-receiving sockets.

### Claim 8 (depends on 5)

An electronic starter according to claim 5 wherein said pulse generator is formed by a Triac-type, bi-directional module connected in series to a plurality of capacitors able to withstand the imposition of 650 volts thereon.

### Claim 9 (depends on 8)

An electronic starter according to claim 8 wherein said line and filtering detector unit is provided by a line detection stage comprising a voltage divider including resistors having indiscriminate polarity connected in series with a filtering stage of the resistive-capacitive type, and wherein the output of said line and filtering detector unit is connected through a Diac to the gate of said Triac-type, bi-directional module.