Abstract: A broadband longitudinal vibrator transducer having a laminar head mass section including at least three layers coupled to electromechanical transducer elements. The head section includes a forward head mass, a compliant member abutting the forward head mass and a rear head mass abutting both the compliant member and the transducer elements. The compliant member allows the head mass section to mechanically resonate in at least two frequencies expanding the bandwidth of the transducer. The compliant member can be an active transducer element.

Abstract: A method of generating electrical and magnetic fields in salt water marine environments using an elongated dimensionally stable flexible electrode (30) having a current carrying inner portion (31) in an outer protective and electrically conductive sheath (33) formed of ruthenium dioxide or iridium oxide. A layer of titanium cladding (33) may be provided on the inner current carrying portion (31) for carrying the outer sheath (33). The anode electrode is utilized for generating electrical current, such as for use in developing magnetic fields in salt water marine environments, preferably as an element of a sweep cable device having a floatation means around which one or more electrodes are helically wound.

Abstract: An electric cartridge fuse having a channel shaped fusible link section which carries a gas evolving core is provided with means for assuring positive axial positioning of the core without requiring deformation of the fuse link. The gas evolving core is provided with a lateral protrusion which extends through and operatively engages one of the perforations in the fuse link thereby positively axially positioning the core with respect to the fuse link.

Abstract: An edge seal for a lithium or other consumable metal anode comprises a hydrophobic, chemically inert polymer coating having a high ratio of flexural modulus to flexural strength, a low Izod impact value, and low elongation properties. The seal is applied to the edge of the anode under an atmosphere of gas which is non-reactive with the anodic metal.

Abstract: A holder for an electric fuse is provided with a Hall-effect sensor arrangement which is integrally mounted in the fuse holder in close proximity to the current path through the holder. The Hall-effect sensor provides an output voltage responsive to the magnetic field resulting from the flow of current along the current path. The output from the Hall sensor is then processed to provide an indication of whether current is flowing through the fuse holder.

Abstract: A process for pressure bonding a consumable, reactive metal anode plate to a bipolar plate for use in an electrochemical cell. Pressure is applied to the anode plate in a given direction progressively over a given area to mechanically bond that area of the anode plate to the bipolar plate, thereby forcing out any trapped air from in between the plates.

Abstract: A method for depositing a micron-size metallic film on a transparent substrate by thermal deposition employing a focused visible laser. The method includes the step of positioning the substrate in a gas cell containing a metal bearing gaseous compound. A nucleation layer is formed on a surface of the substrate by either shining an ultraviolet light on the substrate surface or by heating the substrate to a temperature which is less than the temperature at which the molecules of the gaseous compound decompose. Next, a laser which may be visible or near infrared is focused onto the substrate to provide localized heating of the area of the substrate to which the beam is incident. Molecules of the gaseous compound thermally decompose on the heated area to deposit a metal film thereon.

Abstract: An electric plug fuse of the type wherein one end of the fusible element is retained in a channel between the insulating body of the fuse and an outer metal shell is provided with a geometrically configured fusible element which allows extremely thin elements to be used while maintaining a high level of structural and electrical integrity in the fuse.

Abstract: A broadband radial vibrator transducer having at least two laminar resonant sections coupled to a radial electromechanical transducer element where each laminar section includes at least two layers. Each resonant section has a mass layer and a compliant member layer where the compliant member layer is fixed between the transducer element and the mass layer. The compliant member allows the resonant section to mechanically resonate along with the transducer element providing at least two resonant frequencies, thereby expanding the bandwidth of the transducer.

Abstract: An improved conduit (50) communicating between a pressurized source (10) of solution and a partially filled reservoir (34) associated with a drip chamber (24) in a continuous-flush system. The conduit comprises a tube (54,56) that is bent at approximately a 45 degree angle so that solution discharging from the conduit (50) is diverted to impinge against the interior wall (58) of the reservoir (34) before interfacing with the solution (62) accumulated therein. The arrangement reduces bubble formation normally associated with turbulent discharge flow during filling and flushing of the system.

Abstract: A pressure sensor includes a diaphragm and an overpressure stop, with a gap inbetween for displacement of the diaphragm in response to an applied pressure, the diaphragm being formed of laser-recrystallized polysilicon. Data extraction is accomplished either by depositing or forming four piezoresistors on the diaphragm and connecting them as the elements of a Wheatstone bridge circuit or by using the appropriately doped laser-recrystallized diaphragm as a piezoresistor itself.

Abstract: A method for repairing clear defects on a photomask. The method includes the steps of coating the photomask with a positive photoresist; exposing the photoresist to a laser beam for localized heating thereof to a temperature above 500.degree. C. to darken or char the polymer; and removing the unexposed polymer from the photomask. The method may also include the intermediate step of heating the polymer to a temperature between 200.degree. C. and 500.degree. C. to brown the polymer before the polymer is exposed to the laser which heats it to a temperature above 500.degree. C.

Abstract: A method of fabricating a Schottky barrier MOSFET wherein a polysilicon gate chip is disposed adjacent the drain and source regions of a single crystal silicon substrate surface, and a metal is deposited on the top surface of the gate chip and the drain and source regions of the substrate surface by direct reaction of the silicon of the surfaces with a compound of a tungsten or molybdenum. Preferably, the sidewalls of the gate chip are masked during the deposition of metal to avoid the formation of a metal bridge between the gate and drain or the gate and source.

Abstract: An optical fiber magnetometer employing balanced magnetostrictive oscillations to measure D.C. and low frequency ambient magnetic fields. The magnetometer includes an optical fiber interferometer 18 having a laser beam input 10 for travel through first and second arms 14, 16 of the interferometer. First and second magnetostrictive rods 20, 22 forming a matched pair are coupled to the respective optical fibers in the first and second interferometer arms 14, 16. An applied oscillating magnetic field is applied to each of the rods 180.degree. out of phase. The D.C. or low frequency magnetic field to be measured, when combined with each of the applied fields, induces a change in the path length of each of the interferometer arms. The difference in the change in path length of each of the interferometer arms is determined to develop a signal representative of the D.C. to low frequency ambient magnetic field.

Abstract: A method for intermetallic diffusion bonding of piezoelectric components, wherein ceramic pieces with fired-on silver electrodes are stacked with a thin shim of solid indium alloy therebetween. The indium alloy preferably comprises 25% indium, 37.5% lead and 37.5% tin. The stack is placed under 150 psi compression and heated at a temperature of about 350.degree. for 30-48 hours in an inert gas. Almost immediately upon being heated, a liquid-solid diffusion takes place in which a small amount of the silver diffuses from the electrodes into the now liquid indium alloy. The alloy in the interface becomes saturated with silver producing a new quaternary alloy which has a higher melting point than the previous indium alloy shim. Thus, there is a gradual solidification of the alloy as the concentration of silver increases. After solidification of the new alloy during the remainder of the heating time, there is a gradual diffusion of the indium into the silver and vice versa.

Abstract: An elongated dimensionally stable flexible electrode (30) having a current carrying inner portion (31) in an outer protective and electrically conductive sheath (33) preferably formed of ruthenium dioxide. A layer of titanium cladding (33) may be provided on the inner current carrying portion (31) for carrying the outer sheath (33). The anode electrode is utilized for generating electrical current, such as for use in developing magnetic fields in salt water environments, preferably as an element of a sweep cable device having a floatation means around which one or more electrodes are helically wound.

Abstract: Thin free standing single crystal films can be produced by sputter depositing a layer of stressable metal onto a single crystal substrate, treating the composite so produced to effect stressing of the metal layer which then peels away with a portion of the single crystal substrate attached to the metal layer. The free standing film thus produced has typical thickness in the order of tens of micrometers. The metal layer can subsequently be removed by acid etching or other suitable etching techniques, to leave the free standing single crystal film, having a thickness from about 5 microns to about 50 or more.

Abstract: An improved system for precisely measuring temperatures at remote locations using a microprocessor and resistance temperature detectors is achieved by providing means for pre-selecting a particular temperature range and using this temperature range information to generate a comparison level for determining the measured temperature. By employing the present invention, the fixed number of bits used to produce the temperature information output is concentrated over a limited range of temperatures, thereby achieving greater precision, since each information bit represents a much smaller number.

Abstract: This disclosure depicts a substantially constant capacitance circuit for use with an external circuit having a variable voltage signal across first and second terminals. The circuit produces a constant capacitance across the terminals as the voltage signal varies. The value of capacitance is adjustable. The capacitance circuit comprises a first variable voltage source having its positive terminal operatively connected to the first terminal and a second variable voltage source having its positive terminal operatively connected to the second terminal. First, second, third and fourth reverse biased diodes are provided. The first diode is connected across the first voltage source and the fourth diode is connected across the second voltage source. The second diode is connected from one side of the first voltage source to the opposed side of the second voltage source and the third diode is connected between the first and second voltage sources in an opposite configuration to the second diode.

Abstract: An edge seal for a lithium or other consumable metal anode comprises a hydrophobic, chemically inert polymer coating having a high ratio of flexural modulus to flexural strength, a low Izod impact value, and low elongation properties.