Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Shunsuke Kakisaka

Yoshiharu Nishiura

Masanori Higashi

Hiroshi Enami

Shigefumi Oda

Hiroshi Nohara

Atsushi Utsubo

Kazuo Takeda

Yukiya Kanazawa

Mikio Miura

Masahito Yoshida

Takashi Yamamoto

Shiki Nakayama

Rie Tonomori

Makoto Inoue

Takashi Maniwa

Yasutaka Horibe

Kenji Akiyoshi

Kouichi Sugimoto

Akio Takubo

Tatsuo Nishimoto

Jun Tominaga

A lamp () has an inner tube () pinch sealed at one end to form a pinch seal (), to which a base () is attached. The base () has a pair of base pins () provided in parallel to the axis of the inner tube (). A pair of connection wires () that extend out from the pinch seal () are inserted into the respective base pins () and are fixed by concavities located in a portion of the base pins (). Each of the concavities is concave in a direction orthogonal to the base pins () and parallel to an imaginary plane that traverses central axes of the base pins ().

Lamp comprising glass tube having pinched sealed portion at end

The present invention aims to provide a metal vapor discharge lamp that has an outer tube less likely to break, and that is obtained at low manufacturing cost. A metal vapor discharge lampcomprises: an outer tubehaving an open end portionat one end and a closed end portionat another end; an inner tubehoused in the outer tube; a discharge tubehoused in the inner tube; and a baseattached to the open end portionof the outer tube, wherein relationships of t&#x2267;1.1&#xd7;d; 0&#x3c;d; and 0.3&#x2266;t are satisfied, where t denotes a minimum thickness, in millimeters, of the closed end portionof the outer tube, d denotes a shortest distance, in millimeters, in a direction of a longitudinal axis of the outer tube, between an inner surfaceof the closed end portionof the outer tubeand an outer surfaceof an end portionof the inner tube, the end portionbeing located opposite from the base

Metal vapor discharge lamp and lighting apparatus

A lamp having: an arc tube () including a main tube portion and a pair of thin tube portions () provided at ends of the main tube portion; and an adjacent conductor () including a strip-shaped metal plate. In the adjacent conductor (), a portion of the metal plate in the direction of length thereof, from the middle of the metal plate to just before an edge thereof, is a gripping portion () having a shape suitable for gripping the outer circumferential of one of the thin tube portions (). One end of the gripping portion () is a free end. The gripping portion () is disposed along an outer circumferential surface of the thin tube portion () so as to be in contact with the outer circumferential surface, and is elastically deformable in accordance with expansion in the radial direction of the thin tube portion ().

High-intensity discharge lamp

To aim to provide a lighting apparatus that is compact yet easy in lamp replacement. A lighting apparatuscomprises: a lampincluding an outer tubeand an arc tubeprovided inside the outer tube; and an opening-type lighting fixturehaving a mirror parthaving a concave reflective surfaceinside which the lampis disposed. The mirror partreflects light emitted from the lampat the reflection surfacesuch that the reflected light is emitted through an openingof the mirror part. Relational expressions 22&#x2266;r&#x2266;28, R&#x2266;130, and 3.5&#x2266;R/r are satisfied, with r denoting a maximum outer diameter [mm] of the outer tube, and R denoting an opening diameter [mm] of the mirror part

Illuminating device

A metal vapor discharge lamp comprising an arc tube, an airtight tube housing the arc tube, and a base bonded to one end of the airtight tube with use of an adhesive, wherein the airtight tube is covered by a protective tube to improve safety as compared to a case where the protective tube is simply bonded to the base with an adhesive. The protective tube is fixed to the base with a double fall-off prevention structure, and latched to the base when a force including gravity and inertia acts on the protective tube toward the closed end of the protective tube in the axial direction thereof. The above-described structure eliminates the need of arranging the protective wall for securing the safety on the side of a lighting device on which the metal vapor discharge lamp is to be fixed, thereby preventing the lighting device from becoming large in size.

Metal vapor discharge lamp

An object of the present invention is to provide an illumination apparatus which includes an illumination fixture having an open-type reflector and a metal halide lamp, and can suppress a decrease in intensity and occurrence of glare. The illumination apparatus includes a metal halide lamp and an illumination fixture. The metal halide lamp includes an arc tube which has therein a pair of electrodes, an inner tube which houses the arc tube and has a pinch seal part at one end, and an outer tube which houses the inner tube and has a base at one end. The illumination fixture includes a reflector having a concave reflecting surface, a socket, and an attachment. In the inner tube, a diffusing part which diffuses light emitted from the arc tube is formed in an area closer to a lower end of the inner tube than a center between the pair of electrodes.

Illumination apparatus and metal vapor discharge lamp

With regard to a metal vapor discharge lamp with a triple tube structure including a discharge tube, an inner tube, and an outer tube, misalignment of axes of the inner tube and the outer tube is prevented. The metal vapor discharge lamp () is composed of a discharge tube () having a pair of electrodes therein, an inner tube () having a pinch-sealed part () at an end thereof and hermitically housing the discharge tube therein, and an outer tube () housing the inner tube therein, and a base (). In a clearance between the inner tube and the outer tube, there disposed a restrain member () for restraining movement of the inner tube relative to the outer tube in a direction orthogonal to an axis of the metal vapor discharge lamp.

Metal vapor discharge lamp with a restrain member for inner tube

A metal halide lamp according to the present invention includes: an outer tube; an inner tubethat is provided in the outer tube, has a sealing portionin at least one end portion, and is made of quartz glass; an inner tubeprovided in the outer tube; and an arc tubeprovided in the inner tube, wherein assuming that the outer tubehas a maximum outer diameter A (mm), the inner tubehas a maximum outer diameter B (mm), and the metal halide lampconsumes P (W) of power, the following relationships are satisfied:0.06+15.8&#x2266;&#x2266;25,0.05+9.0&#x2266;, and1.14&#x2266;A/B,where P satisfies 20 W&#x2266;P&#x2266;130 W.

Metal halide lamp and lighting apparatus using the same

he present invention aims at providing a metal halide lamp having a configuration to achieve the following goals: to prevent the lamp from burning out during the life due to a rise in lamp voltage; and to obtain high luminous efficiency at the same time. The metal halide lampcomprises: an arc tubemade of translucent ceramic and having a main tube partin which a pair of electrodesis disposed; and an outer tubehousing the arc tubetherein. 4.0&#x2266;L/D&#x2266;10.0, where L (mm) is a length of a space between the electrodesand D (mm) is an internal diameter of the main tube part. R/r &#x2267;3.4, where R (mm) is an internal diameter of the outer tubeand r (mm) is an external diameter in the main tube partof the arc tube, within a region positionally corresponding to, in a radial direction of the outer tube and the arc tube, the space between the electrodes, on a cross-sectional surface where an outer circumference of the arc tubecomes closest to an inner circumference of the outer tube. M&#x2266;4.0, where M (mg/cc) is a density of mercury enclosed in the arc tube

Metal halide lamp and luminaire

The present invention provides a metal halide lamp in which the change of the color temperature is suppressed regardless of the orientation of the light emitting bulb in use. The metal halide lamp includes a light emitting bulb of translucent ceramics that includes a light emitting portion and tubular portions that are connected to the light emitting portion. The light emitting portion includes a liquid holding portion on the inner surface of the light emitting portion so as to hold a liquefied substance that moves on the inner surface toward one of the tubular portions. The internal diameter d of the light emitting bulb at the liquid holding portion satisfies 0.4D&#x3c;d&#x3c;0.7D, where D is an internal diameter of the light emitting bulb at the maximum internal diameter portion of the light emitting portion.

Metal halide lamp

A metal vapor discharge lamp, comprises: a translucent ceramic envelope, the envelope comprising a center bulb for defining a discharge space and side tubes, the center bulb and the side tubes being integrally molded; a pair of current suppliers extending through hollows of the side tubes respectively, each of the current suppliers comprising an electrode and a lead-in wire, a first end of the electrode being disposed in the discharge space, a second end of the electrode being connected with the lead-in wire; a sealant for hermetically sealing open ends of the side tubes; and a light-emitting metal contained in the discharge space. An inner wall and an external wall of a seamless boundary portion between the center bulb and each of the side tubes have the smallest curvature radius of Rmm and Rmm, respectively. The center bulb has an inner diameter of D mm. The lamp has an electric power of P watts. The radius R, radius R, diameter D and electric power P satisfy,&#x2212;0.00076+0.304&#x2266;&#x2266;&#x2212;0.00076+0.490, &#x2003;&#x2003;Formula (1)where P&#x2266;350 watts; and1.28&#x2266;1.39. &#x2003;&#x2003;Formula (2)

Metal vapor discharge lamp having configured envelope for stable luminous characteristics

A metal halide lamp has an arc tube including an arc tube container made of an oxide-based translucent ceramic material. The arc tube is filled with cerium halide as a luminescent material and a halide of a rare earth element that is more reactive with the ceramic material than is the cerium halide. Accordingly, a reaction between the oxide-based translucent ceramic material and the halide of a rare earth element is accelerated while a reaction between the oxide-based translucent ceramic material and the cerium halide is suppressed. This suppresses a decrease of the cerium halide that serves for light emission, and also reduces changes in the lamp color temperature. Thereby, during aging of the lamp, the flux maintenance factor and color temperature are improved. Therefore, the indoor-outdoor metal halide lamp provides a white light source color that has high-wattage, high luminous efficiency, and a long service life.

A metal vapor discharge lamp including an arc tubethat includes a containerand power transmission membersand. The container, made of translucent ceramic, is divided into a main tube portionand narrow tube portionsandextending out from both ends of the main tube portion. The power transmission membersandrespectively include electrode pinsandmade of tungsten. Coilsandmade of tungsten are respectively wound around ends of electrode pinsand, which are respectively joined with electrode supporting membersandmade of conductive cermet. Electrode length Lis set to (0.041P+0.5) mm to (0.041P+8.0) mm, 'P' representing a lamp power in watts. Alternatively, a narrow tube portion length Lis set to (0.032P+3.5) mm to (0.032P+8.0) mm inclusive.

Metal vapor discharge lamp and lighting apparatus capable of stable maintenance of characteristics

To provide a high-efficiency and long-life high intensity discharge lamp that is obtained by a configuration in which a neon gas or a neon-based gaseous mixture is filled as a starting-assistance rare gas for an alumina ceramic arc tube, and a filling pressure is set to 13 kPa or more. The high intensity discharge lamp is provided with the alumina ceramic arc tube having a discharge arc tube, alumina ceramic narrow tubes formed at both end portions of the discharge arc tube, electrodes and power feeders, the electrodes and the power feeders being arranged to form spaces in the narrow tubes. The discharge arc tube is filled with the neon gas or the neon-based gaseous mixture as the starting-assistance rare gas at a filling pressure of 13 kPa or more.

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Osaka, Japan

Shunsuke Kakisaka