Abstract: Variable backspace in electrode assemblies for high pressure sodium lamps is achieved by employing a hollow electrode base which has one end formed to frictionally engage an electrode, which electrode includes a solid core having a coil about one end thereof. The solid core is inserted into the electrode base a given distance and is maintained in this position by friction until welding is accomplished. The electrode base is provided with a positioning ring which is formed at the time the base is first formed. The electrode assemblies can be utilized with lamps having different arc lengths while using arc tubes having the same size.

Abstract: An arc tube for an electrodeless metal halide discharge lamp has an arc chamber fabricated from a material selected from the group consisting of magnesia-doped polycrystalline alumina, silicon dioxide doped polycrystalline alumina and monocrystalline alumina. The arc chamber is tubular and has at least one end and has a given outside diameter. At least one end cap closes the at least one end of the arc chamber, the end cap being formed from magnesia-doped polycrystalline alumina and comprising a substantially cup-shaped member having an inside diameter which is sealed to the outside diameter of the arc chamber by a shrink-fit.

Abstract: A ground member, and method of forming same, is provided wherein a ground strap is electrically attached to the shield layer of a coaxial cable. To this end, a conductive ground strap is sandwiched between a sleeve and the shield layer. The sleeve may be in the form of a conductive sleeve which is crimped to the coaxial cable. A connector module containing such a ground member is also provided.

Abstract: A connector is provided which includes first and second portions which are slidably engagable, and a lock disabler. The lock disabler includes a first enclosure-like segment pivotally attached to a second enclosure-like segment. When the first and second portions are fully engaged and the first segment has been attached to the second portion, the second segment may be pivoted relative to the first segment for attachment to the first portion to prevent disengagement of the first and second portions.

Abstract: An arc tube for a high intensity discharge lamp. The arc tube has a hermetically sealed body formed from a vitreous material subject to devitrification, at least two oppositely disposed electrodes are sealed in the body. An are generating and sustaining medium is provided in the body and operates to produce visible light when an electric current is applied to the electrodes. The are tube has a given color rendering index, and at least a portion of the medium comprises a color correcting component of lithium iodide which contributes no only to the given color rendering index but which also acts as a devitrification agent. The improvement comprises an anti-devitrification component in the medium, the anti-devitrification component having a minimal detrimental effect on the given color rendering index while increasing the life of the are tube.

Abstract: An improved blue-green emitting ZnS:Cu,Cl phosphor is made by doping the phosphor with small amounts of gold and increasing the amount of low intensity milling between firing steps. The improved phosphor has better halflife and brightness characteristics while maintaining its desired emission color.

Abstract: A improved ZnS:Cu electroluminescent phosphor having a halflife of at least about 900 hours. The halflife improvement is made by doping the phosphor with minor amounts of gold and substantially increasing the amount of low intensity milling between firing steps. The improved phosphor has a dramatically longer halflife without sacrificing brightness or exhibiting large shifts in emission color.

Abstract: A cable connector kit is provided which may be assembled to electrically and mechanically connect a central conductor of a coaxial cable to a male or female contact. An upper and a lower insulator are provided in the kit, such insulators being attachable to each other to form an insulator body having a cavity therein. The lower insulator includes an anvil which extends into such cavity and the upper insulator includes a compressing member which extends into such cavity and mates with the anvil. When assembled, a cable connector assembly is provided wherein the central conductor overlaps a portion of the contact, the central conductor and contact portion being sandwiched between the anvil and compressing member.

Abstract: A highly efficient discharge lamp has a color rendering index of about 85, a lumens per watt rating of about than 90, a correlated color temperature of 3000.degree. K., and a wall loading of about 21 W/cm.sup.2. The lamp has an outer glass envelope and a pair of electrical conductors extending into the interior of the glass envelope; a quartz discharge tube disposed within the outer envelope and including a pair of spaced electrodes which are electrically connected to the electrical conductors for creating an electrical discharge during operation of the lamp, the discharge tube having an arc chamber. An arc generating and sustaining medium is provided within the arc chamber and includes the halides of sodium, scandium, lithium, dysprosium and thallium, a fill gas selected from argon and xenon, and a given quantity of mercury to achieve a desired lamp voltage. In a preferred embodiment of the invention the halides are iodides and are present in the mole ratio of about 24-44:1:9.

Abstract: A connector is provided including a plastic bushing having a bore which extends therethrough. A contact having an abutment region extends into one end of the bore to an adjacent abutment region of the bushing. A central conductor of a coaxial cable extends into an opposite end of the bore and is soldered to the abutment region of the contact. The plastic bushing is inserted into a conductive connector shell which engages a shield layer of the coaxial cable. The adjacent abutment regions prevent rotation of the contact about its axis.

Abstract: A conductive cable clamp is provided which may be attached to an end region of a coaxial cable in such a manner that a portion of the cable clamp penetrates the outer insulative jacket of the coaxial cable and contacts the ground wire braid of the coaxial cable. Such ground wire braid is severed at the end of the coaxial cable rather than being folded back towards the outer surface of the outer insulative jacket in the usual manner.

Abstract: Methods of operating a discharge lamp by amplitude-modulating and pulsing the lamp input power waveform. The techniques control both the arc stabilization and color characteristics of the lamp, respectively. The alternating current (AC) input waveform is amplitude-modulated to stabilize the arc with a swept AC periodic wave (such as a sine wave, sawtooth wave, square wave, etc., or a combination thereof). The swept wave can be generally swept from about 20 kHz to 60 kHz, with a preferable band sweep of from approximately 40 kHz to 50 kHz. The sweep can also be patterned (such as allowing the sweep to have stepped rises and falls within the sweep cycle). The sweep may also contain multiple-frequency sweeps that are bundled together to modulate the carrier wave. These modulation forms are used to center, constrict and stabilize the arc. In addition to this stabilization, the lamp input waveform is pulsed to control and regulate the color characteristics of the lamp.

Abstract: A connector module, connector module kit and connector module and panel assembly are provided. The connector module includes a conductive plate having at least one aperture through which a wall of an insulator extends, the wall defining a cavity. A contact extends through the base of the insulator and into the cavity, the contact being spaced from the wall. The connector module may be easily attached to a panel by using tabs extending from the panel or a C-shaped clip which is attached to the wall.

Abstract: An optically transparent polycrystalline alumina sintered body consists essentially of alumina, magnesia, yttria and zirconia. The magnesia is present in an amount of about 0.020 wgt. percent, the yttria is present in an amount of about 0.035 wgt. percent, and the zirconia is present in an amount of about 0.018 wgt. percent. An arc tube for a high pressure sodium lamp made from this composition has greatly increased resistance to sodium loss and concomitant outer jacket darkening, whereby the effective amount of lumen output is increased.

Abstract: An arc robe for a discharge lamp comprises a hollow body containing an arc generating and sustaining medium. The body has oppositely disposed ends each containing an electrode sealed therein by a seal associated with the ends. At least one of the ends has a heat shield thereabout, the heat shield comprising a metal foil wrapped about the end and being fixed to the seal. The metal foil is preferably nickel having a thickness of from about 0.0254 mm to 0.127 mm.

Abstract: A connector is provided including a plastic bushing having a first bore which extends therethrough in a first direction and a second bore which extends into the bushing in a second direction and intercepts the first bore. A contact extends into one end of the first bore to a surface area facing the second bore, and a central conductor of a coaxial cable may be extended into an opposite end of the first bore to such contact. A retaining member may be inserted into the second bore until the retaining member engages the central conductor to sandwich the central conductor between such retaining member and the contact. The plastic bushing may be inserted into a conductive connector shell which is connected to the coaxial cable and engages a shield layer of such coaxial cable.

Abstract: A phosphor comprising a host consisting essentially of lithium borosilicate having the general formula Li.sub.x Mg.sub.y B.sub.2 Si.sub.6 O.sub.z F.sub.w, where x can be 2 or 6, y can be 6 or 4, z can be 19.75 or 20 and w can be 4 or 4.5, and at least one activator selected from the group consisting of vanadium, europium, manganese, cerium and terbium.

Abstract: A connector and connector kit is provided which includes an insulative housing, a conductive shell and a contact. When assembled, the contact and conductive shell are contained in the insulative housing. In particular, the conductive shell includes one segment which is positioned in a cavity which extends into one surface of the insulative housing, and another segment which extends out of such cavity and into a recess provided at such surface. The contact is positioned in a bore which extends into the insulative housing from a housing end to the cavity.

Abstract: Inorganic intercalation phosphors were made by doping an inorganic intercalation compound having an atomic structure interspersed with vacant spaces with selected activator ions capable of luminescent emission when excited by cathode rays and having the general formula Na.sub.1-x Li.sub.x (Mg.sub.2-y Mn.sub.y)LiSi.sub.4 O.sub.10 F.sub.2.

Abstract: Inorganic intercalation phosphors having either the general formula Na.sub.2 (Mg.sub.3-x Tb.sub.x) Al.sub.2 Si.sub.2 O.sub.10 F.sub.2 or Na.sub.2 Mg.sub.3 {(Al.sub.2-x Eu.sub.x)Si}O.sub.10 F.sub.2, were made by doping an inorganic, intercalation, highly charged fluorophlogopite compound having an atomic structure interspersed with vacant spaces with selected activator ions such as terbium or europium capable of luminescent emission when excited by external radiation such as cathode rays.