CA2483519A1 - Inductively powered lamp assembly - Google Patents

Inductively powered lamp assembly Download PDF

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Publication number
CA2483519A1
CA2483519A1 CA002483519A CA2483519A CA2483519A1 CA 2483519 A1 CA2483519 A1 CA 2483519A1 CA 002483519 A CA002483519 A CA 002483519A CA 2483519 A CA2483519 A CA 2483519A CA 2483519 A1 CA2483519 A1 CA 2483519A1
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Canada
Prior art keywords
lamp
electrode
lead
capacitor
reactance
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Granted
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CA002483519A
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French (fr)
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CA2483519C (en
Inventor
David W. Baarman
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Philips IP Ventures BV
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Individual
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Priority to CA2771058A priority Critical patent/CA2771058C/en
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/10—Ultra-violet radiation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C02F1/325—Irradiation devices or lamp constructions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
    • H01J13/02—Details
    • H01J13/46—One or more circuit elements structurally associated with the tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/52—Means forming part of the tube or lamps for the purpose of providing electrical connection to it directly applied to or forming part of the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/44—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp directly applied to, or forming part of, the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/10—Starting switches magnetic only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/25—Circuit arrangements for protecting against overcurrent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/34—Seals or gaskets for filtering elements
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/006—Cartridges
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/322—Lamp arrangement
    • C02F2201/3222—Units using UV-light emitting diodes [LED]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/322—Lamp arrangement
    • C02F2201/3228—Units having reflectors, e.g. coatings, baffles, plates, mirrors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/326—Lamp control systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

A lamp assembly configured to inductively receive power from a primary coil.
The lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in series with the lamp and the secondary to tune the circuit to resonance. The capacitor is preferably selected to have a reactance that is substantially equal to or slightly less than the reactance of the secondary and the impedance of the lamp. In a second aspect, the lamp assembly includes a sealed transparent sleeve that entirely encloses the lamp circuit so that the transparent sleeve is fully closed and unpenetrated. The transparent sleeve is preferably the lamp sleeve itself, with the secondary, capacitor and any desired starter mechanism disposed within its interior.

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

An inductively powered lamp assembly comprising:
an inductive secondary to receive power from an inductive primary, said inductive primary having a reactance;
a lamp disposed in series with said secondary, said lamp having an impedance;
and a capacitor disposed in series with said inductive secondary and said lamp, said capacitor selected to have a reactance that is substantially equal to or slightly less than said impedance of said lamp and said reactance of said secondary, whereby said capacitor, said lamp and said secondary operate substantially at resonance.

The lamp assembly of claim 1 wherein said reactance of said secondary is further defined as an operating reactance;
said impedance of said lamp is further defined as an operating impedance;
wherein said capacitor, said lamp and said secondary operate substantially in resonance when said lamp and said secondary are substantially at operating temperature.

The lamp assembly of claim 2 wherein said secondary is further defined as a coil of LITZ wire.

The lamp assembly of claim 2 wherein said secondary is further defined as a coil of magnet wire.

The lamp assembly of claim 3 wherein said lamp assembly includes a closed sleeve surrounding and fully enclosing said secondary, said lamp and said capacitor, said sleeve being unpenetrated.

The lamp assembly of claim 5 wherein said closed sleeve is substantially transparent to light of a desired wave length.

The lamp assembly of claim 3 wherein said lamp includes a lamp sleeve, said capacitor and said secondary being fully enclosed within said lamp sleeve, whereby said lamp sleeve is unpenetrated.

The lamp assembly of claim 7 wherein said lamp sleeve is substantially transparent to light of a desire wave length.

The lamp assembly of claim 8 wherein said lamp is further defined as an incandescent lamp.

The lamp assembly of claim 8 wherein said lamp is further defined as an electric discharge lamp.

The lamp assembly of claim 8 wherein said lamp is further defined as a light emitting diode.

The lamp assembly of claim 3 wherein said secondary is coaxial with said lamp.

An inductively powered lamp assembly comprising:
an inductive secondary to receive power from an inductive primary, said inductive secondary having a reactance;
a lamp disposed in series with said secondary, said lamp having an impedance that is substantially equal to said reactance of said secondary; and a capacitor disposed in series with said secondary and said lamp, said capacitor having a reactance that is substantially equal to or slightly less than said impedance of said lamp and said reactance of said secondary.

The lamp assembly of claim 13 wherein said reactance of said secondary is further defined as an operating reactance;
said impedance of said lamp is further defined as an operating impedance;

wherein said lamp and said secondary operate substantially in resonance when said lamp and said secondary are substantially at operating temperature.

The lamp assembly of claim 14 wherein said secondary is further defined as a coil of LITZ wire.

The lamp assembly of claim 15 wherein said secondary is further defined as a coil of magnet wire.

The lamp assembly of claim 15 wherein said lamp assembly includes a closed transparent sleeve surrounding and fully enclosing said secondary, said capacitor and said lamp, said sleeve being unpenetrated.

The lamp assembly of claim 17 wherein said lamp includes a lamp sleeve, said lamp sleeve being substantially transparent to light of a desired wave length, said secondary being fully enclosed within said lamp sleeve, whereby said lamp sleeve is unpenetrated.

The lamp assembly of claim 18 wherein said lamp is further defined as an incandescent lamp.

The lamp assembly of claim 18 wherein said lamp is further defined as an electric discharge lamp.

The lamp assembly of claim 15 wherein said secondary is coaxial with said lamp.

An inductively powered lamp assembly comprising:
a lamp circuit including:
an inductive secondary to receive power from an inductive primary; and a lamp disposed in series with said secondary;
a transparent sleeve entirely enclosing said lamp circuit.

The lamp assembly of claim 22, wherein said sleeve defines a chamber surrounding said lamp circuit, said chamber being partially evacuated to insulate said lamp from the environment.

The lamp assembly of claim 22, wherein said sleeve defines a chamber surrounding said lamp circuit; and further including a gas filling said chamber, said gas selected to provide a desired level of heat conduction between said lamp and the environment.

The lamp assembly of claim 24 wherein said lamp circuit further includes a capacitor in series with said lamp and said secondary, said capacitor being entirely contained within said sleeve.

An inductively powered lamp assembly comprising:
an electric-discharge lamp having a pair of electrodes;
a secondary to receive power from an inductive primary, each of said electrodes including a first lead electrically connected to said secondary; and a magnetic starter switch operable between open and closed positions in response to a magnetic field, each of said electrodes including a second lead electrically connected to said magnetic starter switch, said magnetic starter switch shorting said electrodes across said secondary when in said closed position to preheat said lamp.

The lamp assembly of claim 26 wherein said magnetic starter switch is operable in response to a magnetic field oriented substantially perpendicularly to a magnetic field powering said secondary.

An inductively powered electric-discharge lamp assembly comprising:
a lamp having a pair of electrodes and an electric-discharge gas contained within a lamp sleeve;
an inductive secondary to receive power from an inductive primary;

means for electrically connecting said secondary to at least one of said electrodes, whereby said secondary provides power to said electrode when subjected to an appropriate electromagnetic field generated by an inductive primary; and wherein said secondary and said electrically connecting means are enclosed within said sleeve, whereby said lamp is self-contained with said sleeve being fully sealed and unpenetrated.

The electric discharge lamp assembly of claim 28, wherein said inductive secondary has a reactance, said lamp having an impedance that is substantially equal to said reactance of said secondary, said capacitor having a reactance that is substantially equal to or slightly less than said impedance of said lamp and said reactance of said secondary.

The electric discharge lamp assembly of claim 29 further comprising a magnetic starter switch being operable between open and closed positions in response to a magnetic field, said magnetic starter switch shorting said electrodes across said secondary when in said closed position to preheat said lamp.

An inductively powered incandescent lamp assembly comprising:
an incandescent lamp having a filament contained within a lamp sleeve;
an inductive secondary to receive power from an inductive primary;

means for electrically connecting said secondary to said filament, whereby said secondary provides power to said filament when subjected to an appropriate magnetic field by an inductive primary; and wherein said secondary and said electrically connecting means are enclosed within said sleeve, whereby said lamp is self-contained with said sleeve being fully sealed and unpenetrated.

The electric discharge lamp assembly of claim 31 further comprising a capacitor connected in series with said inductive secondary and said lamp; and wherein said inductive secondary has a reactance, said lamp having an impedance that is substantially equal to said reactance of said secondary, said capacitor having a reactance that is substantially equal to or slightly less than said impedance of said lamp and said reactance of said secondary.

An inductively powered electric-discharge lamp assembly comprising:
first and second secondaries;
a lamp having first and second electrodes, said first electrode being electrically connected to said first secondary, said second electrode being electrically connected to said second secondary;
a capacitor connected in series between said first secondary and said second secondary; and a starter means for preheating said electrodes, said starter means electrically connected in series between said first electrode and said second electrode.

The electric-discharge lamp assembly of claim 33 wherein:
each of said first secondary and said second secondary includes first and second leads;
each of said first electrode and said second electrode includes first and second leads, said first lead of said first electrode being electrically connected to said first lead of said first secondary, said first lead of said second electrode being electrically connected to said first lead of said second secondary;
said capacitor being connected in series between said second lead of said first secondary and said second lead of said second secondary; and said starter means being electrically connected in series between said second lead of said first electrode and said second lead of said second electrode.

The electric-discharge lamp assembly of claim 34 wherein said secondaries have a combined reactance, said lamp having an impedance that is substantially equal to said combined reactance of said secondaries, said capacitor having a reactance that is substantially equal to or slightly less than said impedance of said lamp and said combined reactance of said secondaries.

An inductively powered electric-discharge lamp assembly comprising:

first and second secondaries;
a lamp having first and second electrodes, said first electrode being electrically connected to said first secondary, said second electrode being electrically connected to said second secondary;
a capacitor connected in series between said first electrode and said second electrode; and first and second remotely operable switch means for preheating said electrodes, said first switch means electrically connected in series between said first electrode and said first secondary to selectively short said first electrode across said first secondary, said second switch means electrically connected in series between said second electrode and said second secondary to selectively short said second electrode across said second secondary.

The electric-discharge lamp assembly of claim 36 wherein:
each of said first secondary and said second secondary includes first and second leads;
each of said first electrode and said second electrode includes first and second leads, said first lead of said first electrode being electrically connected to said first lead of said first secondary, said first lead of said second electrode being electrically connected to said first lead of said second secondary;
said capacitor being connected in series between said second lead of said first electrode and said second lead of said second electrode;

said first switch means being electrically connected in series between said second lead of said first electrode and said second lead of said first secondary; and said second switch means being electrically connected in series between said second lead of said second electrode and said second lead of said second secondary.

The electric-discharge lamp assembly of claim 36 wherein said secondaries have a combined reactance, said lamp having an impedance that is substantially equal to said combined reactance of said secondaries, said capacitor having a reactance that is substantially equal to or slightly less than said impedance of said lamp and said combined reactance of said secondaries.

An inductively powered electric-discharge lamp assembly comprising:
first and second secondaries;
a lamp having first and second electrodes, said first electrode being electrically connected to said first secondary, said second electrode being electrically connected to said second secondary;
a capacitor connected in series between said first electrode and said second electrode; and first and second remotely operable switch means for preheating said electrodes, said first switch means electrically connected in series between said first electrode and said first secondary to selectively short said first electrode across said first secondary, said second switch means electrically connected in series between said second electrode and said second secondary to selectively short said second electrode across said second secondary.

The electric-discharge lamp assembly of claim 39 wherein:
each of said first secondary and said second secondary includes first and second leads;
each of said first electrode and said second electrode includes first and second leads, said first lead of said first electrode being electrically connected to said first lead of said first secondary, said first lead of said second electrode being electrically connected to said first lead of said second secondary;
said capacitor being connected in series between said second lead of said first electrode and said second lead of said second electrode;
said first switch means being electrically connected in series between said second lead of said first electrode and said second lead of said first secondary; and said second switch means being electrically connected in series between said second lead of said second electrode and said second lead of said second secondary.

The electric-discharge lamp assembly of claim 40 wherein said secondaries have a combined reactance, said lamp having an impedance that is substantially equal to said combined reactance of said secondaries, said capacitor having a reactance that is substantially equal to or slightly less than said impedance of said lamp and said combined reactance of said secondaries.

An inductively powered electric-discharge lamp assembly comprising:
first and second secondaries;
a lamp having first and second electrodes, said first electrode being electrically connected to said first secondary, said second electrode being electrically connected to said second secondary;
first and second capacitors, said first capacitor connected in series between said first electrode and said first secondary, said second capacitor connected in series between said second electrode and said second secondary; and first and second remotely operable switch means for preheating said electrodes, said first switch means electrically connected in series between said first electrode and said first secondary to selectively short said first electrode across said first secondary, said second switch means electrically connected in series between said second electrode and said second secondary to selectively short said second electrode across said second secondary.

The electric-discharge lamp assembly of claim 42 wherein:
each of said first secondary and said second secondary includes first and second leads;
each of said first electrode and said second electrode includes first and second leads, said first lead of said first electrode being electrically connected to said first lead of said first secondary, said first lead of said second electrode being electrically connected to said first lead of said second secondary;

said first capacitor being connected in series between said first lead of said first electrode and said first lead of said first secondary;
said second capacitor being connected in series between said first lead of said second electrode and said first lead of said second secondary;
said first switch means being electrically connected in series between said second lead of said first electrode and said second lead of said first secondary; and said second switch means being electrically connected in series between said second lead of said second electrode and said second lead of said second secondary.

The electric-discharge lamp assembly of claim 43 wherein said lamp has an impedance, a combined reactance of said first secondary and said second secondary being substantially equal to said impedance of said lamp, a combined reactance of said first capacitor and said second capacitor being substantially equal to or slightly less than said impedance of said lamp and said combined reactance of said first secondary and said second secondary.

A method of manufacturing a lamp assembly comprising the steps of:
connecting a lamp to an inductive secondary, connecting a capacitor in series with the lamp and the inductive secondary;
inserting the lamp, the capacitor, and the secondary into a structure; and sealing the structure so that the lamp, the capacitor and the secondary do not penetrate the structure.

The method of claim 45 wherein the capacitor is selected to have a reactance that is substantially equal to or slightly less than the impedance of the lamp and the reactance of the secondary, whereby the capacitor, the lamp and the secondary operate substantially at resonance.

The method of claim 46 wherein said lamp connecting step includes the steps of:
connecting a first end of a filament wire to a first lead of the inductive secondary;
connecting a second end of a filament wire to a first lead of the capacitor;
and connecting a second lead of the capacitor to a second lead of the inductive secondary.

The method of claim 46 wherein said lamp connecting step includes the steps of:
connecting a first lamp electrode to a first lead of the inductive secondary;
connecting a second lamp electrode to a first lead of the capacitor; and connecting a second lead of the capacitor to a second electrode of the inductive secondary.

A method of manufacturing a lamp assembly comprising the steps of:
connecting a lamp to an inductive secondary, the lamp having an impedance and the secondary having a reactance, connecting a capacitor in series with the lamp and the inductive secondary, the capacitor being selected to have a reactance that is substantially equal to or slightly less than the impedance of the lamp and the reactance of the secondary, whereby the capacitor, the lamp and the secondary operate substantially at resonance.

The method of claim 49 wherein said lamp connecting step includes the steps of:
connecting a first end of a filament wire to a first lead of the inductive secondary;
connecting a second end of a filament wire to a first lead of the capacitor;
and connecting a second lead of the capacitor to a second lead of the inductive secondary.

The method of claim 49 wherein said lamp connecting step includes the steps of:
connecting a first lamp electrode to a first lead of the inductive secondary;
connecting a second lamp electrode to a first lead of the capacitor; and connecting a second lead of the capacitor to a second lead of the inductive secondary.

The lamp assembly of claim 17 wherein said sleeve is a substantially flexible plastic tube, opposite ends of said tube being sealed to provide a fully sealed enclosure.

The lamp assembly of claim 52 wherein said opposite ends of said tube are crimped.

The lamp assembly of claim 53 wherein said plastic tube is further defined as a Teflon tube.

A lamp assembly for an inductively powered lamp comprising:
a base;
a lamp mounted to said base;
an outer sleeve mounted to said base about said lamp, said outer sleeve having a flange;
a flexible, resilient seal disposed between said base and said outer sleeve;
a locking ring fitted over said sleeve and secured to said base, said locking ring entrapping said flange to retain said outer sleeve in place on said base about said lamp.

The lamp assembly of claim 55 wherein said base defines an annular channel, said flange seated within said annular channel.

The lamp assembly of claim 56 wherein said seal is fitted about said base within said annular channel.

The lamp assembly of claim 57 wherein said locking ring includes a radial portion and an axial portion, said radial portion engaging said flange, said axial portion being affixed to said base.

The lamp assembly of claim 55 wherein said base includes a generally cylindrical portion having an outer surface, said outer sleeve having a generally cylindrical portion having an inner surface, said seal being disposed between and directly engaging said outer surface of said base and said inner surface of said sleeve.

The lamp assembly of claim 59 wherein said seal is an o-ring seal.
CA2483519A 2002-04-26 2002-06-07 Inductively powered lamp assembly Expired - Lifetime CA2483519C (en)

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US10/133,860 US6731071B2 (en) 1999-06-21 2002-04-26 Inductively powered lamp assembly
PCT/US2002/017901 WO2003092329A2 (en) 2002-04-26 2002-06-07 Inductively powered lamp assembly

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