Abstract: Encapsulated three terminal polar electrolytic capacitor device suitable for surface mounting on circuit board or other flat substrate and not vulnerable to reverse circuit connection.

Abstract: The oral impression tray is adapted for use by a non-professional in making a form fitted mouthguard of his or her own dentition and comprises a base of U-shaped configuration, an inner and outer wall projecting upright from the base for forming a trough into which impression material is removably inserted for forming the mouthguard and end stops integrally connecting the outer and inner wall. The end stops are located a predetermined distance posteriorly from the outer wall and extend upwardly a predetermined height to maintain a predetermined separation between the upper and lower teeth during centric occlusion.

Abstract: A method for bleaching stained teeth by applying a concentrated solution of peroxide to the stained teeth and focusing a beam of light at the teeth with the beam containing the combination of ultraviolet and infrared energy for activating the peroxide solution.

Abstract: The gas metal arc welding process of the present invention extends the axial spray metal transfer range with a non rotating arc from 10 to 25 lbs/hr using an electrode wire diameter between 0.035 to 0.052 inches. The process is carried out by maintaining an electrode extension of between 3/4 to 11/4 inches with a three component shielding gas mixture consisting essentially of argon and oxygen in combination with carbon dioxide or carbon monoxide in a volume proportion of oxygen 1-2% carbon dioxide 8-15%, balance argon. The arc voltage is maintained in a range of between 29 and 40 volts.

Abstract: Getter assembly having an annular channel for containing getter material, the bottom of the channel being provided with an annular, integral, groove of bulb-shaped cross-section extending into said channel to lock with said getter material.

Abstract: A catalyst has been found for the low pressure hydroformylation of alcohols to produce aldehydes. This catalyst consists of a rhodium containing compound, an iodide containing compound, and a chelating Group V compound, which is used alone or in combination with a monodentate, Group V compound.It is the first rhodium-based catalyst that generates acetaldehyde via hydroformylation of the methanol. The reaction is typically carried out at 160.degree.-180.degree. C. and 1000-2000 psi. The acetaldehyde rate and selectivity are 1-5 Mhr.sup.-1 and 50-75%. Conventional cobalt catalysts require operating pressures of at least 3000-6000 psi in order to obtain reasonable productivities.

Abstract: A plasma arc process and a combination plasma arc torch and nozzle assembly in which the arc plasma gas composition contains at least 50% oxygen. An oxygen containing reactive gas is passed through a gap between a first and second nozzle body of a nozzle assembly having a first and second arc constricting passageway adapted to constrict the arc plasma. The width of the gap is of a critical dimension to permit a tungsten electrode to be used without suffering from rapid electrode erosion.

Abstract: A method of constructing a thin electroluminescent lamp assembly comprising forming a UV curable dielectric matrix by loading nonencapsulated particles of electroluminescent phosphor into a UV curable dielectric composition, depositing a coating of such composition over the surface of a transparent conductor, curing such composition by exposure to ultraviolet light in a substantially inert atmosphere, interposing a coating of a silver conductive material in the form of a band about the periphery of the transparent conductor to form an electrical bus bar with the band having an elongated section of the same composition extending therefrom to form a first electrical lead, curing said band and electrical lead, superimposing a conductive coating over the surface of the UV curable dielectric composition with the conductive coating having an elongated section extending therefrom to form a second electrical lead laterally spaced apart from the first electrical lead, curing the conductive coating and second electrica

Abstract: A reversing heat exchanger of the plate and fin type having multiple aluminum parting sheets in a stacked arrangement with corrugated fins separating the sheets to form multiple flow paths, means for closing the ends of the sheets, an input manifold arrangement of headers for the warm end of the exchanger and an output manifold arrangement for the cold end of the exchanger with the input air feed stream header and the waste gas exhaust header having an alloy of zinc and aluminum coated on the inside surface for providing corrosion protection to the stack.

Abstract: A controllable A.C power supply for supplying quasi square waves of alternating current to a welding arc between an electrode and a metal workpiece such as aluminum, aluminum alloys and the like comprising a first controllable alternately conducting current path for providing for current flow from the electrode to the workpiece; a second controllable alternately conducting current path for providing for current flow from the workpiece to the electrode; inductor means connect in the first and second current paths for accumulating and dissipating energy to maintain the square waves of current; and commutating means for forcibly rendering the second current path nonconductive whereby energy stored in the inductor means provides a voltage sufficient to reestablish the welding current flow from the electrode to the workpiece.

Abstract: A gas shielded plasma arc torch having a collet for receiving and gripping an electrode wherein the collet has a portion with a substantially spherical surface geometry for engagement with and rotation in first and second seating means within the torch and means for locking the position of the collet thereby locking and fixing the position of the electrode with respect to the torch.

Abstract: An acetylene storage vessel having an asbestos free, hardened, porous calcium silicate filler material comprising at least 35 percent by weight crystalline phase reinforced by alkali resistant glass fiber and a method for the manufacture thereof.

Abstract: A regulated constant current is supplied to a welding load by an SCR power supply having an SCR rectifier network interposed in series between the welding load and applied input power with the SCR power supply comprising means for generating a first feedback signal proportional to arc current which substantially coincides in time and phase with the arc current; means for generating a second feedback signal proportional to arc current which is substantially nonresponsive to the arc current fundamental ripple frequency, means for weighing the first and second feedback signals in a predetermined proportion to establish an error feedback control signal and means for applying trigger signals to the SCR rectifier network in timed synchronism with the input AC power line as a function of the error feedback control signal.

Abstract: A cored wire electrode for use with a shielding gas, particularly in out-of-position welding, said electrode having a core material containing rutile, an arc stabilizer, deoxidizers including from about 5 to 15 weight percent of a manganese and silicon-containing compound, from about 1 to about 7 weight percent of magnesium and/or magnesium-aluminum alloys, from about 3 to about 10 weight percent manganese oxide, from about 5 to 20 weight percent nickel, from about 2 to 15 weight percent silica, and from about 0.5 to 5.0 weight percent Al.sub.2 O.sub.3 -SiO.sub.2 -K.sub.2 O.

Abstract: Electric welding system having a governor control for regulating the speed of the electrode drive motor and for controlling the direction of motor rotation in response to voltage and current welding parameters such that during welding the motor is driven in a forward direction toward the workpiece and under the control of a weld speed potentiometer whereas during a short circuit condition and at termination of the welding operation the motor direction is reversed.