Abstract:
A compact self-ballasted fluorescent lamp includes a double-spiral arc tube formed by winding a glass tube to its both ends around a spiral axis, and sealing electrodes each having a filament coil at the ends of the glass tube, and a holding member that has a closed bottom and holds the arc tube. The holding member has, at its end wall, insertion openings through which the ends of the glass tube are inserted. The ends of the glass tube are inserted to such positions that enable the filament coils to be positioned within the holding member, and the minimum distance L, in the insertion direction of the ends of the glass tube, between the filament coil and the edge of the insertion opening of the holding member is 6 mm.
Abstract:
A lamp with a reflector comprises a high pressure discharge lamp and a reflector. The reflector has a first opening and a second opening. Clearance between a sealing portion of the high pressure discharge lamp and the second opening is substantially filled. The sealing portion includes a first glass portion extending from a luminous bulb and a second glass portion provided in the inside of the first glass portion, and the sealing portion has a portion to which a compressive stress is applied. Moreover, when the sealing portion is disposed to extend in a substantially horizontal direction, a portion of the reflector is formed with an air inlet for introducing an air flow striking against an upper portion of the luminous bulb 1 and then coming into a lower portion of the luminous bulb 1.
Abstract:
A discharge lamp is disclosed, which comprises a discharge vessel sealed in a tubular envelope. The lamp has a lamp base covering an end part of the envelope, and fixing means for providing a substantially rigid fixing of the envelope to the lamp base. The fixing means comprises a metal clamp ring, which surrounds a part of the envelope external to the lamp base. A melt plastic lining is provided between the clamp ring and the envelope. The melt plastic lining substantially completely fills a space between the envelope and the clamp ring. A method is also provided for manufacturing a discharge lamp as above. The method comprises the steps of providing a space between the clamp ring and the envelope, and providing a hot-melt plastic lining in the space between the clamp ring and the envelope. Subsequently, the plastic lining is melted, and substantially completely fills the space between the clamp ring and the envelope, establishing a tight and stable mechanical connection between the clamp ring and the envelope.
Abstract:
A high pressure discharge lamp including a ceramic discharge tube defining an inner space and having an opening formed within an end portion thereof, an electrode system provided within the inner space, a sealing member including a ceramic or a cermet with a through hole formed therein, at least a part of the sealing member being fixed within the opening of the ceramic discharge tube, and a metal member. A joining portion is interposed between the metal and sealing members, and includes a main phase contacting the metal member and an intermediate ceramic layer contacting the sealing member and existing between the sealing member and the main phase. The main phase includes a porous bone structure with open pores, is made of a sintered product of metal powder, and includes a ceramic phase impregnated into the open pores thereof.
Abstract:
The invention facilitates insertion of fluorescent semilamps for retrofitting of existing fluorescent lamps with inductive ballasts to electronic high-frequency ballast operation. The pin bases of the semilamps are designed to be separably rotatable as opposed to the previously rigid pin base assembly. The rotatable pin base allows easy insertion of the new semilamps into existing lamps, with only the pin base being rotated to secure the semilamps in their sockets. The semilamp may further provide a grip to aid in the rotation of the pin base, locking snaps to secure the rotatable pin base, or length equalization between different types of fluorescent lamps by addition of an expansion shoulder to the pin base.
Abstract:
In a bulb-form lamp, a threaded portion 31 of a lamp cap 5, that is, a shell 30 is made of a conductive resin. The conductive resin shell 30 and an eyelet 50 constituting the lamp cap 5 are composite parts, which are molded integrally with a lamp case 20. A part of the conductive resin shell 30 is provided with a terminal connective portion 30a projecting into the lamp case 20. The terminal connective portion 30a is connected with an electrode terminal 40 led out of a printed circuit board 13 of a lighting circuit 14 so that the conductive resin shell 30 and the lighting circuit 14 are electrically connected. By doing so, it is possible to simplify the assembly of bulb-form lamp, and to reduce an assembly cost, and further, to manufacture a bulb-form lamp having a high quality and a lamp case for the bulb-form lamp.
Abstract:
An object of the present invention is to provide a joined body of a first member comprising a first joining face and sapphire exposed at the first joining face and a second member comprising a second joining face and sapphire or polycrystalline alumina exposed at the second joining face, so that the joining strength can be improved and crack formation along the joining interface can be prevented. The first member 2 and second members 4A, 4B are joined with each other by providing a raw material for the joining material between the first and second members and heat treating the raw material at a temperature of 1730null C. or lower. Alternatively, The joining materials 5A, 5B comprise an oxide or an oxynitride containing a rare earth element, aluminum and silicon, and wherein the oxide or oxynitride has a silicon content of 3 mole percent or higher and 10 mole percent or lower calculated as silicon dioxide.
Abstract:
The invention comprises, in one form thereof, an electrical connector for connecting a first conductor and a second conductor, the first conductor and the second conductor both having an insulation coating and the second conductor having a stripped end, including a housing and an electrical terminal disposed with the housing. The electrical terminal includes at least one insulation displacement contact for electrical connection with the first conductor, and including at least one releasable pressure contact for connection and disconnection with the stripped end of the second conductor.
Abstract:
A low pressure gas discharge lamp with a tubular discharge vessel is provided with two separate capacitive coupling members at its ends, said discharge vessel having a small inner diameter of preferably less than 5 mm. Each coupling member comprises a cylindrical tube of dielectric material. The electrical connection to said coupling members is realised by pressing a spring element having an inner diameter smaller than the outer diameter of the cylindrical tube around this tube. Said spring element tightly surrounds a metal body on the cylindrical tube while forming a number of contact points.
Abstract:
A high intensity discharge lamp (HID) (200) is disclosed. The high intensity discharge lamp (200) includes an electrically powered lamp (200) having a lamp exterior (220) and at least one lead (226) extending outside of the lamp (200), a male connector (204) that is fastened at its base (302) to one of the leads (226) of the lamp (200), an insulate housing (206) having an inner contour (402) shaped to fittedly encompass therein the male connector (204) and at least a portion of the lead (226) of the lamp (200), and a cement contact (208) that fastens, without air gaps, the housing (206) to the lamp exterior (220). The electrical interface (202) includes a male connector (204) that is fastened at its base (302) to one of the leads (226) of the lamp (200), an insulate housing (206) having an inner contour (402) shaped to fittedly encompass therein the male connector (204) and at least a portion of the lead (226) of the lamp (200), and a cement contact (208) that fastens, without air gaps, the housing (206) to the lamp exterior (220). A boot (212) hermetically locks over the insulate housing (206). A female connector (210) is mated to the male connector (204) within the boot (212). A feed line (501) with an insulating cover (502) is electrically connected to the female connector (210) on one end and to a power source at the other end.