Abstract: An arc lamp comprises an electrode assembly with O-ring seals that seal in xenon gas within a glass tube envelope and shaped electrode that, together with a contoured tube geometry inside the glass tube envelope near the electrode, will aerodynamically redirect the supersonic forces of gas ignition to reduce the mechanical impact pulses that would otherwise ultimately work the electrode assembly out of the end of the glass the envelope.

Abstract: A drop-in arc lamp assembly comprising an arc lamp with fitted cathode and anode heat sinks each including a thin-wall copper strip that is brazed in pleated folds between inner and outer cylindrical rings to create cooling fins. The drop-in lamp assembly also includes an insulative sleeve in which the arc lamp and heat sinks are disposed and a pair of connection bushings piercing the wall of the sleeve and providing an electrical connection to the arc lamp outside the sleeve. A flush-mount receptacle for the drop-in lamp assembly includes a housing with a fan axially positioned behind the arc lamp and heat sinks when they are in place in the sleeve and dropped-into the housing. A glass epoxy board attached to the housing supports and insulates electrical terminals that contact the bushings to power the arc lamp. The arc lamp includes a copper heat conduction flange that surrounds a front window reduced in diameter from the diameter of the arc lamp.

Abstract: An arc lamp embodiment of the present invention comprises a triplet set of annular reflectors that gather light from an arc created between an anode and a cathode into essentially parallel beams that exit along the longitudinal axis of the generally cylindrical lamp through a sapphire window. A first of the three reflectors has a concave parabolic shape that reflects light out along the lamp axis in one bounce. A second of the three reflectors has a concave elliptical shape with a rear projecting focus and is back to back with the first reflector such that the open bowls of the reflectors face in opposite directions along the axis of the lamp. A third of the three reflectors has a convex parabolic shape that receives light bounced from the second reflector and gives it a second bounce out through an opening in the first reflector and then through the window, parallel to the lamp axis.

Abstract: An embodiment of the present invention is a short arc lamp comprising an alumina ceramic cylindrically shaped body with a concave opening at one end that is silvered to form a reflector, a cathode suspended within the concave opening in opposition to an anode that protrudes through a hole in the center of the concave opening from the opposite end of the body, a circular iron base that supports the anode at its center and attaches to the body with a metal ring that bridges a separation between the base and the body, and a copper heat transfer pad that is brazed to the inside of the metal ring and the body such that heat is efficiently transferred from the area of the concave reflector near the hole for the anode to a heat sink that attaches to the metal ring outside the lamp. A copper plug brazed as an integral part of the anode serves to distribute heat efficiently throughout the anode.

Abstract: A portable soldering device comprises a short arc lamp including an alumina ceramic cylindrically shaped body with a concave opening at one end that is plated with silver to form an ellipsoidal reflector, a cathode suspended within the concave opening in opposition to an anode protruding through a hole in the center of the concave opening from the opposite end of the body, a circular iron base that supports the anode at its center and attaches to the body. The soldering device further comprises a cone-shaped hood over the flat window and a supply of inert gas attached to the hood that excludes smoke, residue and splatter from infiltrating the hood.

Abstract: The present invention comprises a transformer having a magnetic core that is smaller and shorter than the winding form for the primary and secondary coils, the core is surrounded by an sound deadening and insulating material, such as foam, and is encased in a sealed tube.

Abstract: A short-arc flashlamp of the type having an internally integral reflector including an anode and cathode member mounted to extend along a central axis of symmetry of the lamp and having distal ends spaced apart to define a short-arc gap. The lamp is driven by current pulses such that the average peak currents across the arc gap exceed about one hundred amperes in pulses ranging from about two to ten microseconds.

Abstract: An apparatus for monitoring the light energy power level of a beam of light, includes beamsplitters on the axis of the light beam for directing portions of the light beam in first and second paths respectively orthogonal to the axis while transmitting the remaining portion of the light beam therethrough. First and second photodetectors having similar spectral responsivity intercept the first and second light beam portions respectively, and detect and signal the light energy power level of the respective first and second light beam portions. Analysis circuitry coupled to the first and second photodetectors and responsive to the output signals therefrom to calculate the total light energy power level of the light beam. The apparatus resolves linearly polarized light into two orthogonal components while permitting most of the light to exit. This exit beam can be analyzed in terms of the incident beam or monitored for measurement or control purposes.

Abstract: A arc discharge light pipe comprised of a sapphire light pipe, a cathode, and an anode. The anode is a hollow cylinder with an end cap having an aperture therein. The pointed cathode and the end cap of the anode form an arc gap which produces a conical arc discharge. The light from the conical arc discharge passes through the aperture into the hollow anode. The sapphire light pipe is positioned inside the hollow anode to collect the light and focus it on a desired point.

Abstract: An arc lamp of the type having an internally integral reflector including an electrode which has an inlet passageway which deliver fluid to a point below the electrode tip and also has an outlet passageway to withdraw fluid from the electrode. The arc lamp further includes a housing which has an internal cavity which houses the body of the arc lamp. The internal cavity of the housing has a spiral passageway which directs fluid around the body of the lamp for improved cooling efficiency.

Abstract: An apparatus for use as an alignment and centering tool for providing a fixed spatial alignment between a rotor and a stator, including a base member and at least one finger member fixedly secured to the base member and extending generally therefrom. The finger member is adapted to be positioned between the rotor and the stator that are to be aligned and centered. A first releasable coupling is provided for operatively connecting the rotor and the finger member to hold the tool and the rotor in a selectively releasable, fixed spatial relationship. A second releasable coupling is also provided for operatively connecting the stator and the finger member to hold the tool and the stator in a selectively releasable, fixed spatial relationship. An alternative user-adjustable embodiment is also provided.

Abstract: A short-arc lamp of the type having an internally integral reflector including electrodes mounted to extend along a central axis of symmetry of the lamp and having distal ends of similar shape which are spaced apart to define a short-arc gap such that the lamp can be directly driven by alternating current.

Abstract: A short arc lamp includes a window assembly which can be fitted together and secured to a hollow cylindrical body member of the lamp in a single braze. The window assembly includes a transparent window, a tubular cowling member, a retaining ring and struts for supporting a cathode within the lamp. The lamp further includes a hollow concave reflecting shell which is held in place within the first body member by a second hollow cylindrical body member and a dielectric spacer ring.

Abstract: A short arc lamp includes a window assembly which can be fitted together and secured to a hollow cylindrical body member of the lamp in a single braze. The window assembly includes a transparent window, a tubular cowling member, a retaining ring and struts for supporting a cathode within the lamp. The lamp further includes a hollow concave reflecting shell which is held in place within the first body member by a second hollow cylindrical body member and a dielectric spacer ring.

Abstract: A gain control circuit for a light source in an optical encoder derives a signal from the phototransducers that receive the light through the encoder disc. In one embodiment, a signal is taken between the transducer and potential source and in alternative embodiments the signal is taken from the phototransducer output. If a periodic index pulse is generated, a correcting circuit compensates for its effect. Where all of the transducers do not receive a substantially constant continuing illumination level, a filter-integrator circuit provides the d.c. component to the gain control circuit.

Abstract: A short arc type lamp having a concave reflecting wall including a convex space formed behind the concave wall such that the reflecting wall is relatively thin near the focal point of the lamp and relatively thicker radially outward. A copper sleeve member is attached to the reflecting wall within the convex space to conduct heat from the reflecting wall to the exterior wall of the lamp.

Abstract: An improved short-arc gas discharge lamp having a solid ceramic body with an integral reflector surface. The lamp includes a sapphire window, fitted to one end of the ceramic body, and a thermally and electrically conductive base fitted to the opposite end of the ceramic cylinder to form a sealed pressure chamber. The window is secured to a unitary U-shaped flange for improved strength and leak resistance. A pair of annular back-up rings secure the window flange to the ceramic body so as to relieve stress on the window flange. The reflective surface is formed by pressing the ceramic body, when hot, with an unpolished mandrel, for greater accuracy in surface configuration. A smooth, highly reflective surface is obtained by subsequent surface treatment.

Abstract: An improved high intensity metal halide lamp constructed from a lamp envelope assembly to which are fused a pair of mating prebeaded electrode assemblies. The lamp envelope assembly is formed from an arc discharge envelope to which are attached a pair of side arms coaxial with the arc discharge envelope and on opposite sides thereof. The prebeaded electrode assemblies are constructed from an electrode ribbon assembly which is encapsulated by vitreous quartz which has a lower hydroxyl ion content than the quartz used in the side arms of the lamp envelope.

Abstract: A selective infrared radiation source includes an opaque body of boron nitride positioned to surround a resistive element capable of being heated by the passage of electrical current therethrough, said boron nitride body and resistive element being enclosed by an outer hermetic envelope transparent to infrared radiation. The method includes heating said resistive element such that the boron nitride is heated to a temperature of between approximately 1200.degree. C. and 2000.degree. C.

Abstract: A method of converting inertial mechanical energy into a high energy direct current electrical pulse of short time duration is disclosed. Apparatus for practicing the method is described. According to the invention, a rotating mass is provided together with electrical conductor means for producing a localized magnetic field at the surface of the mass. A localized magnetic flux compression means is also provided at the surface of the mass and either the electrical conductor means or the flux compression means is rotated with the mass to produce periodic compression of the flux of the localized magnetic field in response to the rotation of the mass. A load is connected across the electrical conductor during such flux compression which converts a major portion of the inertial energy of the rotary mass into an exponentially rising pulse of direct current through the load with a very rapid decay.