Abstract:
A mercury-free lamp including: a glass bulb (4) that is filled with a rare gas; a first internal electrode unit (19) and a second internal electrode unit (15) that are provided in the glass bulb (4); and an external electrode (24) that is provided on an outer surface of the glass bulb (4) in an area that corresponds to a discharge path, which is formed during lighting between the first internal electrode unit (19) and the second internal electrode unit (15), such that a positive column is generated along the discharge path and is expanded in transverse sectional area by the external electrode. The first internal electrode unit (19) is composed of internal electrodes (18) and (20), and the second internal electrode unit (15) is composed of internal electrodes (14) and (16).
Abstract:
Construction of a fluorescent lamp bulb of which a portion has been hot moulded according to certain criteria and arrangements which enable the lamp bulb to perform the different functions proper to its operation, in other words: its electronic emission; its power supply; its fixing. It is comprised of a tube (10) having at one end two molded parts (1, 2) which are hollow and have the same shapes. Said moulded parts are separated from each other by their base (14) which is arranged to enable the incorporation of a tube (3). Each moulded part receives a set of electrodes-filament (4, 6) (5, 7), secured at the extremity of the housing (1, 2) by glass-metal welding (20, 21), in such a way that each filament (6, 7) faces the tube (10). The electromechanical elements (4, 6) (5, 7) being thus fixed in the moulded parts, the lamp bulb is closed at its second extremity by a round or flat bottom (15).
Abstract:
A writing gas light system has a gas tube with a first end and a second end. A first cathode is attached to a first end of the gas tube and a second cathode is attached to a second end of the gas tube. An isolated conductor runs along a length of the gas tube and is electrically attached to the second cathode. A light ballast is coupled to the first cathode and to the isolated conductor. In one embodiment, the system has a digitally controlled ballast. The gas discharge ballast has an output applied to the gas tube whose energy can be adjusted. The system has a balanced center tap transformer. The secondary of the transformer is tied to ground through a ground fault detection circuit.
Abstract:
A discharge lamp includes a housing including a dielectric portion having a light transmission area formed of a dielectric material and transmitting light, and a main body portion forming a discharge-gas-filled space together with the dielectric portion, the discharge-gas-filled space being filled with a discharge gas; an electron emission source disposed in the discharge-gas-filled space to face the light transmission area; a discharge path limiting member separating the electron emission source and the light transmission area, in the discharge-gas-filled space, and including an electron passage hole that transmits electrons emitted from the electron emission source; and an external electrode disposed at an outer side of the housing to face the electron emission source across the dielectric portion, and including an opening that passes the light transmitted through the light transmission area.
Abstract:
A low pressure Ultra Violet (UV) light source produces a high intensity output proportional to the inside diameter and length of a arc discharge column. The light source includes a cathode and anode contained within a high density ceramic body and a sapphire window mounted in line with the arc discharge column. The anode is in line with the arc column at the end opposite the sapphire window, and the cathode is disposed to an area outside the arc discharge column to which the arc moves through an aperture in the side of the arc discharge column structure. As the electrons move through the low pressure gas ionization of the gas occurs releasing photons in the UV region of the spectrum. The sum of the photons generated at each location along the arc discharge column produces the high intensity UV radiation that exits the lamp through a sapphire window.
Abstract:
A high brightness excimer light source has an elongated tube containing an excimer-forming gas and electrodes for exciting the gas to form a plasma, and thus create excimers such as a rare gas halogen excimer or a rare gas excimer. Light emitted from the excimer propagating axially along the tube passes out of the tube through an exit device such as a lens or optical fiber at one or both ends of the tube.
Abstract:
A low pressure discharge lamp of double tube structure comprises an outer bulb containing therein a sealed gas and having one end closed and an inner tube supported by an end plate to communicate with the interior of the outer bulb; receiving therein an electrode and restricting an electric discharging path. The end receiving therein the electrode of the inner tube is bonded with an adhesive on the surface on the side facing the outer bulb of the end plate and a part of an end other than said end of said inner tube is in contact to and supported by the end plate. The construction makes bonding operations of the inner tube to the end plate easy and provide a stable condition to the inner tube in an lamp assemblage and reduces lamp weight.