# US 2014/0191580 A1 · Converting a lamp for continued operation following a line current failure

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- Number: US 2014/0191580 A1
- Document ID: US20140191580A1
- Status: Published application
- Kind: A1
- Application number: 14/206,177
- Filed: 2014-03-12
- Published: 2014-07-10
- Earliest claimed: 2011-06-20
- Assignees: AfterGlo Lighting Co., Inc.
- Applicants: Afterglo Lighting Co., Inc.
- Inventors: Jeremy Laurence Fischer; Aaron Cons
- Web page: https://patentgrep.com/patent/US20140191580A1

## CPC

- F21S 6/00: Lighting devices intended to be free-standing (F21S9/00, F21S10/00, {F21S13/12} take precedence {lighting devices specially adapted to be transported from place to place, e.g. lighting devices carried on wheeled supports F21L; details of supports for lighting devices F21V21/00})
- F21S 9/02: the power supply being a battery or accumulator
- F21V 19/002: {the fastening means engaging the encapsulation or the packaging of the semiconductor device}
- H05B 45/3725: Switched mode power supply [SMPS]
- F21S 9/022: {Emergency lighting devices}
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

A low voltage LED bulb having a base that fits a standard light socket designed to receive a bulb operated at line voltage is installed in a conventional lamp, which is connected by a lamp cord to a rechargeable battery, the charge in which is maintained by a charging circuit. The rechargeable battery can be provided in a module equipped with a receptacle capable of receiving a standard plug designed for line voltage, and in this case, the lamp requires no modification other than the replacement of the standard bulb by the low voltage LED bulb. In another embodiment, the battery and charger are incorporated into the lamp.

## Claims

### Claim 1

A method for converting a lamp having a removable light emitter operable on alternating line current at a voltage exceeding 100 volts to a lamp that continues to emit light in the event of a line current failure, the method comprising:
replacing said light emitter with a substitute light emitter operable on a DC voltage substantially lower than 100 volts;
incorporating into said lamp a power supply, having an input and an output, for converting alternating current at a voltage exceeding 100 volts at the input of said power supply to direct current at a low voltage substantially lower than 100 volts and delivering said direct current to the output of said power supply, and a rechargeable battery delivering direct current at a voltage approximately equal to said low voltage, said battery being connected to said output of said power supply and being chargeable by said power supply;
connecting the substitute light emitter to said output of said power supply; and
connecting the input of said power supply to a source of alternating current at a voltage exceeding 100 volts.

### Claim 2 (depends on 1)

The method according to claim 1, in which said battery, when charged, delivers direct current at a voltage of approximately 12 volts.

### Claim 3 (depends on 1)

The method according to claim 1, in which said substitute light emitter is an LED light emitter operable at a voltage of 12 volts DC.

### Claim 4

A method for converting a lamp having a removable light emitter operable on alternating line current at a voltage exceeding 100 volts to a lamp that continues to emit light in the event of a line current failure, the method comprising:
replacing said light emitter with a substitute light emitter operable on a DC voltage substantially lower than 100 volts;
connecting said lamp to the output of a power supply, having an input and an output, said power supply including a charger, connected to said input and output of the power supply, for converting alternating current at a voltage exceeding 100 volts at the input of said power supply to direct current at a low voltage substantially lower than 100 volts and for delivering said direct current to the output of said power supply, said power supply also including a rechargeable battery delivering direct current at a voltage approximately equal to said low voltage, said battery being connected to said output of the power supply and being connected to, and chargeable by, said charger;
connecting the substitute light emitter to said output of said power supply; and
connecting the input of said power supply to a source of alternating current at a voltage exceeding 100 volts.

### Claim 5 (depends on 4)

The method according to claim 4, in which said battery, when charged, delivers direct current at a voltage of approximately 12 volts.

### Claim 6 (depends on 4)

The method according to claim 4, in which said substitute light emitter is an LED light emitter operable at a voltage of 12 volts DC.