US3909653A — Compact electric incandescent lamp having planar …

Claim 1

Independent Claim 344 words

In a single-ended electric incandescent lamp adapted for operation at a predetermined wattage, the combination comprising: a light-transmitting envelope having an hermetic seal at one end and a body portion that contains halogen gas, a planar filament sealed within said envelope body portion and comprising a plurality of interconnected coiled sections that are fabricated from a refractory material which coacts with said halogen gas when the lamp is energized and establishes a gettering cycle that returns vaporized refractory material to said filament, said halogen gas being of a type which requires that the inner walls of said envelope attain a predetermined temperature during the operation of the lamp in order to sustain said gettering cycle, and a mount structure suspending said multi-coil planar filament at a predetermined location within said envelope body portion and comprising (a) a pair of rigid lead-in conductors that are embedded in said hermetic seal and extend into the body portion of said envelope, (b) a transverse bridge member of insulating material that is joined to said pair of lead-in conductors and holds them in spaced apart relationship on opposite sides of said planar filament, and (c) at least one support wire that is anchored in said bridge member and is coupled to a medial part of said planar filament, each of said lead-in conductors consisting of a wire that extends from the hermetic seal directly to and is fastened to a coiled section of the planar filament that constitutes one end of said filament so that said pair of lead-in conductors, conjoined bridge member, support wire and planar filament comprise an integral assembly, the ratio of the width of said planar filament to the maximum cross-sectional dimension of the body portion of said envelope being at least 1:3 so that the inner walls of said envelope are thereby heated to the aforesaid temperature required to sustain the gettering cycle when the lamp is operated at said predetermined wattage, and said lead-in conductors and support wire being composed of a metal which does not chemically react with said halogen gas.

Claim 2

Dependent Claim 344 words

In a single-ended electric incandescent lamp adapted for operation at a predetermined wattage, the combination comprising: a light-transmitting envelope having an hermetic seal at one end and a body portion that contains halogen gas, a planar filament sealed within said envelope body portion and comprising a plurality of interconnected coiled sections that are fabricated from a refractory material which coacts with said halogen gas when the lamp is energized and establishes a gettering cycle that returns vaporized refractory material to said filament, said halogen gas being of a type which requires that the inner walls of said envelope attain a predetermined temperature during the operation of the lamp in order to sustain said gettering cycle, and a mount structure suspending said multi-coil planar filament at a predetermined location within said envelope body portion and comprising (a) a pair of rigid lead-in conductors that are embedded in said hermetic seal and extend into the body portion of said envelope, (b) a transverse bridge member of insulating material that is joined to said pair of lead-in conductors and holds them in spaced apart relationship on opposite sides of said planar filament, and (c) at least one support wire that is anchored in said bridge member and is coupled to a medial part of said planar filament, each of said lead-in conductors consisting of a wire that extends from the hermetic seal directly to and is fastened to a coiled section of the planar filament that constitutes one end of said filament so that said pair of lead-in conductors, conjoined bridge member, support wire and planar filament comprise an integral assembly, the ratio of the width of said planar filament to the maximum cross-sectional dimension of the body portion of said envelope being at least 1:3 so that the inner walls of said envelope are thereby heated to the aforesaid temperature required to sustain the gettering cycle when the lamp is operated at said predetermined wattage, and said lead-in conductors and support wire being composed of a metal which does not chemically react with said halogen gas.

Claim 3

Dependent Claim 14 words

The incandescent lamp of claim 1 wherein said halogen gas consists essentially of bromine.

Claim 4

Dependent Claim 34 words

The incandescent lamp of claim 1 wherein each of said lead-in conductors consists of a single piece of wire and the body portion of said envelope is elongated and of substantially uniform cross section.

Claim 5

Dependent Claim 63 words

The incandescent lamp of claim 1 wherein; said multi-coil planar filament is so located that a planar face of the filament is disposed toward a side wall of said envelope body portion, and the maximum spacing between at least one of the planar faces of said filament and the oppositely-disposed side wall of the envelope is less than the width of said filament.

Claim 6

Dependent Claim 22 words

The incandescent lamp of claim 1 where said lead-in wires extend into and through the associated coiled sections of said planar filament.

Claim 7

Dependent Claim 37 words

The incandescent lamp of claim 1 wherein; the body portion of said envelope is terminated by a hollow sealed-off tip, and said mount structure includes an upstanding member that extends into the sealed-off tip of said envelope.

Claim 8

Dependent Claim 37 words

The incandescent lamp of claim 1 wherein; said envelope is composed of a material selected from the group consisting of quartz and Vycor glass, and said planar filament, lead-in conductors and support wire are composed of tungsten.

Claim 9

Dependent Claim 40 words

The incandescent lamp of claim 1 wherein said mount structure includes a reflector that is disposed in operative relationship with said planar multi-coil filament and is composed of a refractory metal which does not chemically react with said halogen gas.

Claim 10

Dependent Claim 221 words

A single-ended electric incandescent projection lamp comprising; a light-transmitting envelope having a press seal at one end and an elongated body portion, a planar filament sealed within said envelope body portion and comprising a plurality of interconnected helical coiled sections that are arranged in spaced side-by-side relationship with their axes disposed in substantially parallel relationship with the longitudinal axis of said envelope body portion, a unitary mount structure holding said multi-coil planar filament at a predetermined location within said envelope body portion with a planar face of the filament disposed toward a side wall of said envelope body portion, and a pair of rigid lead-in conductors embedded in said press seal and electrically connected to the coiled sections that comprise the ends of said planar filament so that said conductors thereby constitute mechanical support and direct electrical-connector means for said filament, said mount structure including a pair of elongated support members that (a) extend along opposite sides of and beyond said planar filament, (b) have their innermost ends joined by a transverse bridge member of insulating material, and (c) have resilient laterally-protruding intermediate portions that are adapted in response to heat generated by said filament to accommodate variations in the length of the filament coiled sections produced by the thermal expansion and contraction thereof when the filament is energized and deenergized.

Claim 11

Dependent Claim 221 words

A single-ended electric incandescent projection lamp comprising; a light-transmitting envelope having a press seal at one end and an elongated body portion, a planar filament sealed within said envelope body portion and comprising a plurality of interconnected helical coiled sections that are arranged in spaced side-by-side relationship with their axes disposed in substantially parallel relationship with the longitudinal axis of said envelope body portion, a unitary mount structure holding said multi-coil planar filament at a predetermined location within said envelope body portion with a planar face of the filament disposed toward a side wall of said envelope body portion, and a pair of rigid lead-in conductors embedded in said press seal and electrically connected to the coiled sections that comprise the ends of said planar filament so that said conductors thereby constitute mechanical support and direct electrical-connector means for said filament, said mount structure including a pair of elongated support members that (a) extend along opposite sides of and beyond said planar filament, (b) have their innermost ends joined by a transverse bridge member of insulating material, and (c) have resilient laterally-protruding intermediate portions that are adapted in response to heat generated by said filament to accommodate variations in the length of the filament coiled sections produced by the thermal expansion and contraction thereof when the filament is energized and deenergized.

Claim 12

Dependent Claim 23 words

The incandescent projection lamp of claim 9 wherein: said planar filament is fabricated from tungsten wire, and said envelope contains a halogen gas.

Claim 13

Dependent Claim 73 words

The incandescent projection lamp of claim 9 wherein; the elongated body portion of said envelope is of substantially uniform cross section throughout approximately its entire length, said planar filament is symmetrically disposed about and aligned with the longitudinal axis of said envelope, and the maximum spacing between at least one of the planar faces of said filament and the oppositely-disposed inner wall of the envelope is less than the width of said filament.

Claim 14

Dependent Claim 146 words

An electric lamp comprising; a light-transmitting envelope having a sealed end portion and a body portion with arcuate side walls that define a pair of laterally-opposed inner wall surfaces of concave configuration, a light source positioned at a predetermined location within said envelope, a pair of rigid lead-in conductors extending through the sealed end portion of said envelope and electrically connected to said light source, and means resiliently suspending said light source in such position within the envelope comprising a mount structure that includes a pair of resilient stabilizing members that have laterally-protruding intermediate portions which are seated against and compressibly retained between the concave inner wall surfaces of said envelope, said stabilizing members being fastened to said lead-in conductors and supporting one end of said light source, and the other end of said light source being joined to and supported by said rigid lead-in conductors.

Claim 15

Dependent Claim 146 words

An electric lamp comprising; a light-transmitting envelope having a sealed end portion and a body portion with arcuate side walls that define a pair of laterally-opposed inner wall surfaces of concave configuration, a light source positioned at a predetermined location within said envelope, a pair of rigid lead-in conductors extending through the sealed end portion of said envelope and electrically connected to said light source, and means resiliently suspending said light source in such position within the envelope comprising a mount structure that includes a pair of resilient stabilizing members that have laterally-protruding intermediate portions which are seated against and compressibly retained between the concave inner wall surfaces of said envelope, said stabilizing members being fastened to said lead-in conductors and supporting one end of said light source, and the other end of said light source being joined to and supported by said rigid lead-in conductors.

Claim 16

Dependent Claim 20 words

The electric lamp of claim 12 wherein the body portion of said envelope is elongated and of noncircular cross section.

Claim 17

Dependent Claim 76 words

The electric lamp of claim 12 wherein; said light source comprises a coiled filament that thermally expands and contracts in the same general direction as the longitudinal axis of the envelope when the lamp is energized and deenergized, and the said intermediate portions of said stabilizing members are in heat-receptive proximity to said filament and adapted to thermally expand and contract along with said filament and effect comPensating changes in the length of said mount structure.

Claim 18

Dependent Claim 54 words

The electric lamp of claim 12 wherein; the body portion of said envelope is of tubular configuration and has a pair of generally flat oppositelydisposed faces that are joined by rounded side walls, and said stabilizing members are seated against and compressibly retained between the opposed rounded side walls of said envelope body portion.

Claim 19

Dependent Claim 88 words

The electric lamp of claim 15 wherein; said light source comprises a filament having a plurality of joined substantially parallel spaced coils of tungsten wire arranged in the form of a planar grid that is (a) of biplane or monoplane configuration, (b) disposed toward the generally flat faces of said envelope body portion, and (c) oriented so that the coils extend in the same general direction as the envelope axis; the sealed end portion of said envelope comprises a press seal; and, said envelope contains a halogen atmosphere.

Claim 20

Dependent Claim 91 words

The electric lamp of claim 16 wherein; said stabilizing members comprise resilient wires that are joined to the inner ends of the respective lead-in conductors and have their free ends joined by a first transverse bridge member of vitreous material, a second transverse bridge member of vitreous material is anchored to and joins the inner ends of said leadin conductors, and the intermediate portions of said planar-grid filament between the respective coils are attached to auxiliary support wires that are anchored in and depend from said first and second bridge members.

Claim 21

Dependent Claim 121 words

The electric lamp of claim 17 wherein; said envelope body portion is of oval cross section, said resilient stabilizing wires are of generally shallow V-shape and are arranged so that the apex of each wire is disposed toward and is in sliding point-contact with the curved side walls of the envelope body portion, said planar-grid filament, auxiliary support wires, bridge members, stabilizing wires and lead-in conductors are substantially disposed in a common plane, and the inner end of said mount structure is laterally stabilized by a spud wire that is anchored in said first bridge member and extends therefrom into a tipped-off remnant of a vitreous exhaust tube that protrudes from the proximate end of the body portion of said envelope.

Claim 22

Dependent Claim 303 words

In a single-ended electric incandescent lamp adapted for operation at a predetermined wattage, the combination comprising; a light-transmitting envelope having an hermetic seal at one end and a body portion that contains a predetermined amount of bromine, a planar filament sealed within said envelope body portion and comprising a plurality of interconnected coiled sections that are fabricated from a refractory metal which coacts with said bromine when the lamp is energized and establishes a gettering cycle that returns vaporized refractory metal to said filament, and a mount structure holding said multi-coil planar filament at a predetermined location within said envelope body portion and comprising (a) a pair of rigid lead-in conductors that are embedded in said hermetic seal and extend into the body portion of said envelope, (b) a transverse bridge member of insulating material that is joined to said pair of lead-in conductors and holds them in spaced-apart relationship on opposite sides of said planar filament, and (c) at least one support wire that is anchored in said bridge member and is coupled to a medial part of said planar filament, each of said lead-in conductors consisting of a wire which is composed of a metal that does not chemically react with bromine and extends from the hermetic seal directly to and is fastened to a coiled section of the planar filament that constitutes one end of said filament so that said pair of lead-in conductors, conjoined bridge member, support wire and planar filament comprise an integral mount assembly, the width of said planar filament and the maximum cross-sectional dimension of the body portion of said eNvelope being so correlated that the inner walls of said envelope are heated to a temperature of at least 200*C when the lamp is operated at said predetermined wattage and the gettering cycle is thereby sustained.

Claim 23

Dependent Claim 303 words

In a single-ended electric incandescent lamp adapted for operation at a predetermined wattage, the combination comprising; a light-transmitting envelope having an hermetic seal at one end and a body portion that contains a predetermined amount of bromine, a planar filament sealed within said envelope body portion and comprising a plurality of interconnected coiled sections that are fabricated from a refractory metal which coacts with said bromine when the lamp is energized and establishes a gettering cycle that returns vaporized refractory metal to said filament, and a mount structure holding said multi-coil planar filament at a predetermined location within said envelope body portion and comprising (a) a pair of rigid lead-in conductors that are embedded in said hermetic seal and extend into the body portion of said envelope, (b) a transverse bridge member of insulating material that is joined to said pair of lead-in conductors and holds them in spaced-apart relationship on opposite sides of said planar filament, and (c) at least one support wire that is anchored in said bridge member and is coupled to a medial part of said planar filament, each of said lead-in conductors consisting of a wire which is composed of a metal that does not chemically react with bromine and extends from the hermetic seal directly to and is fastened to a coiled section of the planar filament that constitutes one end of said filament so that said pair of lead-in conductors, conjoined bridge member, support wire and planar filament comprise an integral mount assembly, the width of said planar filament and the maximum cross-sectional dimension of the body portion of said eNvelope being so correlated that the inner walls of said envelope are heated to a temperature of at least 200*C when the lamp is operated at said predetermined wattage and the gettering cycle is thereby sustained.

Claim 24

Dependent Claim 25 words

The incandescent lamp of claim 19 wherein said planar multi-coil filament is fabricated from tungsten wire and said envelope also contains an inert fill gas.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-09-29	1979-03-31	1979-09-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-09-29	1983-03-31	1983-09-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-09-29	1987-03-31	1987-09-30	$7700.00	Window Closed / Lapsed

Compact electric incandescent lamp having planar filament and improved mount

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