Abstract: A millimeter wave device having a dielectric substrate with a pair of substantially parallel planar surfaces with at least one predetermined millimeter wave circuit pattern formed in a conductive layer located on at least one of the substrate surfaces. A substantially planar conductive channel plate is mounted adjacent the conductive layer on one substrate surface with the channel plate having an aperture overlying each circuit pattern formed in the conductive layer. A substantially planar conductive cover plate is mounted adjacent one of the channel plates so as to form a first cavity in the region defined by the substrate surface, the channel plate aperture and the cover plate. The device may further include a second substantially planar conductive channel plate mounted adjacent the other one of the substrate surfaces with the second channel plate having an aperture corresponding to and aligned with the first channel plate aperture.

Abstract: A fluid injection method of nondestructive testing for bonding between two layers of material, at least one of which is penetrable is presented. One or two fluid injection members are inserted at selected locations along the penetrable material to the bond line between the materials. In the single injection member test, a fluid under known pressure is injected through the injection member to the bond line. The flow is measured at several locations and an average flow rate under satisfactory bonding conditions is noted. Any flow rates in excess of some fixed amount above this established norm is considered unsatisfactory. In the two injection member test. The two members are adjacently inserted through the material to the bond line and a fluid under known pressure is injected from one injection member to the bond line. If a disbond exists between the two members, the second member receives fluid from the first at the bond line.

Abstract: The rugate filter comprises a glass film which is deposited on one or both end facets of a diode laser. The glass film has a continuously varying refractive index with thickness, usually in the form of a sine wave or a "windowed" sine wave. Such a film may be deposited by ion-assisted co-deposition techniques in which the concentration of the higher refractive index material is periodically varied according to the period required to produce the desired filter. The glass of which the rugate filter is formed has an average refractive index which does not vary with temperature by more than 10.sup.-6 /.degree.C. By reflecting light at the peak wavelength back into the laser, the laser is caused to emit at the desired wavelength. Since the rugate filter selectively reflects light within a narrow band of the desired wavelength, the laser emits light within a narrow peak on the order of 10 .ANG. or less.

Abstract: A multi-mode optical fiber segment having partially reflecting mirrors on each end functions as a resonant cavity with respect to the modulation frequency when the length of the fiber is equal to one-half the modulation wavelength of the light injected into the fiber. Modulated light is injected through a hole in the mirror at one end, either from a fiber, a waveguide, or directly from a laser diode. The core diameter of the cavity fiber is limited only by the requirement that it must be much larger than the input hole. Light exits though a hole in the mirror opposite the input hole. Upon entry into the resonant cavity, light is subject to multi-modal propagation resulting in dispersion. The resultant output light of the fiber is lower overall in intensity, but its useful frequency response is expanded by the bandpass half-skirt of the fiber-optic filter.

Abstract: Method for fabricating a laminated coil conductor for a high current coil which includes wrapping a layer of insulation around a rotatable shaped mandrel and then winding a plurality of copper sheets over the insulation as the mandrel is rotated. Solder is interposed between the copper sheets and between coolant tubes positioned on each end of each coil conductor. The assemblage is then removed from the mandrel and raised to a temperature to bond the copper sheets and coolant tubes together. The assemblage is then placed in a structural box and a plastic is injected into the box to fill any voids between the coil conductor and the box.

Abstract: Apparatus and a process are disclosed for cleaning and/or fluxing circuit card assemblies. The assemblies are moved through an enclosure in which they are sprayed with cleaning and/or fluxing liquid from fenestrated cylinders rotating above and below the path of the assemblies and disposed laterally thereacross. The complex spray impact pattern created by the simultaneous movements of the assemblies and the cylinders effects thorough cleaning and/or fluxing of the assemblies. Separate control of liquid pressure from the cylinders prevents unsoldered components from being dislodged from the assemblies during cleaning and or fluxing.

Abstract: The disclosure is directed to a thermal protection systems for protecting instrumentation transducers having a low maximum operating temperature in the range of 200 degree F. to 900 degrees F. when exposed to operating environment greater than 2000 degrees F. The embodiments of the protection system include the use of zinc solid-to-liquid phase change as a heat sink, water-to-steam phase change as a heat sink and thermal electric cooling combined with a multi-foil insulation material.

Abstract: A method of improving the flowability and reducing voids in liquid synthetic thermosetting resins precursor compositions used to pot structures such as a honeycomb core or electronic parts and assemblies. Up to about 0.50 weight percent of a suitable titanate coupling agent is mixed with the liquid resin precursor, preferably in a vacuum or an inert atmosphere, any necessary hardener is added later to the premixed resin with the agent, then the resin is poured into a mold holding the structure to be potted. The titanate coupling agents have the general formula: ##STR1## where: R is an alkoxy, alkyl, alkenyl, alkynyl or aralkyl group having from 1 to about 30 carbon atoms or a substituted derivative thereof;M is zirconium or titanium; andR is independently an aryl, aralkyl, alkaryl, alkyl or alkeno group having from 1 to about 30 carbon atoms.

Abstract: The present invention proposes a dielectric waveguide formed on a substrate of ultra-low thermal expansion glass which is assembled with a commercially available diode laser to create a temperature stabilized laser. The waveguide comprises multiple dielectric films which have equal and opposite temperature induced changes in refractive index with respect to each other into which is formed a Bragg grating, the grooves of which are sufficiently shallow to allow penetration of light into the waveguide of 1 mm to 1 cm. This provides a signal which is both narrowband and frequency stable so that the optical signal can be guaranteed to remain in a given narrow frequency band. The dielectric layers are deposited using ion assisted deposition (IAD) to provide uniform, high density films with reduced index-temperature coefficients and increased density, resulting in a waveguide with near-zero temperature variations in refractive index.

Abstract: A payload interface ring adapted to releasably secure a payload to a multiple payload adapter arranged to be carried into outer space by a launch vehicle for positioning of the payload in a suitable orbit relative to the earth. The interface ring includes a latching mechanism secured to a base to receive a berthing pin carried by the payload and to releasably latch the berthing pin for securing of the payload for transport of the payload to a desired orbit. A plurality of springs cooperate with the berthing pins and the latching mechamism to secure the payload in a desired latched position during transport to the desired orbit.

Abstract: An actively damped steering rate sensing device for an autopilot control system capable of producing angular rotation in a control plane of an intentionally continuously axially rolling airframe such as a homing missile in response to a rotation related guidance command signal. The device includes an elongated armature member mounted to the airframe for pivotal movement about an axis extending through the member intermediate its length. The pivot axis is oriented with respect to the rotational axis of the airframe so that the armature member will pivot by gyroscopic precession in response to rotation in the control plane of the rolling airframe. Sensing and damping coils are mounted on opposite ends of the armature member. Magnets and flux path return elements are fixedly mounted adjacent each of the coils.

Abstract: A system for calculating the dot product of the vectors A(k) and B(k) of dimension Q written in two's complement representation. A bus has a width sufficient for communicating signals representing a plurality of bit planes A(j,Q) and B(n,Q) corresponding to the two's complement representations of A(k) and B(k), respectively. Circuitry connected to the bus calculates C(j,n)=A(j,Q).B(n,Q) for each of said bit planes. An adder sequentially determines R(n)=C(0,n)2.sup.0 +C(1,n)2.sup.1 + . . . C(N-1,n)2.sup.(N-1) -C(N,n)2.sup.N for n=0,1,2 . . . N.

Abstract: A device for use as a float switch device for use in a liquid medium is disclosed which has a magnetic latching feature used to produce an offset, with the switch actuating in a first manner when the liquid level drops to a first level, and actuating in a second manner when the liquid level rises to a second level which is aabove the first level by a selected offset distance. The float element has two buoyant disks on the ends of a hollow cylinder, with switching magnets being located intermediate the two buoyant disks, and latch magnets being located on the bottom of the bottom buoyant disk. The float element slides vertically on a switch stem having a magnetic reed switch therein and a steel washer on the bottom thereof, with the float element being latched in a downward position by the latch magnets until the liquid level rises to the level of the upper buoyant disk, resulting in crisp and precise operation of the switching function.

Abstract: A method for manufacturing a probe test structure for microcircuits utilizes a multiple coating method in conjunction with a novel double-cell electroplating apparatus having a relatively high-resistance ion path between the cells. Photoresist is applied to both sides of a copper foil, copper posts are electroformed onto selected areas of one side of the foil through image hole patterns, the remaining photoresist is stripped away, polyimide prepreg is laminated to the post side of the foil, the copper posts are exposed by sanding, photoresist is reapplied to both sides of the sanded remainder, additional copper is electroformed on each post through image hole patterns in the post side of the photoresist, the foil on the side opposite the posts is chemically milled to provide leads integral with each post using appropriate masking techniques and, finally, all of the remaining photoresist is removed to leave the desired test probe set.

Abstract: The apparatus includes a rod having a handle end and a cam at the other end, a housing and a hasp holding means, a housing spring, a handle and a handle spring. The housing has an aperture formed therethrough for receiving the rod. The apparatus is adapted to be assembled to wall structure for releasable securing a door. The wall structure will have an aperture formed therethrough for receiving the rod. The apparatus is assembled by locating the housing and housing spring on one side of the wall structure and the handle and handle spring on the other side of the wall structure with the rod extending through the housing aperture and through the wall aperture with its handle end coupled to the handle and handle spring and its cam located in a holding position to engage the housing such that the cam cannot pass through the housing aperture. Means is provided for preventing the housing from rotating when held next to the wall structure.

Abstract: A fault-resistant, solid-state line driver having a pair of P-type transistors in series between a bus output and a voltage source, a pair of N-type transistors in series between the bus output and a connection to ground, and a pair of input lines, one of the input lines being connected to both the gate of the P-type transistor closest to the voltage source and the gate of the N-type transistor closest to the bus output, the other input line being connected to both the gate of the P-type transistor closest to the bus output and the gate of the N-type transistor closest to the connection to ground. Such a line driver is particularly useful in devices utilizing wafer-scale levels of integration, as the failure of any one of the driver's transistors will not result in a shorting of the bus output to either ground or the voltage source.

Abstract: A method for joining carbon-carbon structural elements together using a carbon-carbon pin type fastener for transfer of shear loads. A coating of powdered metal which undergoes a large expansion when reacted in the presence of a gas is used to coat the outer surfaces of a pin which extends through the structural elements to be joined, with the powdered metal coating between the body of the pin and the surfaces of the structural elements through which the pin passes. After installation through the structural elements the pin is heated in an oxygen atmosphere causing the powdered metal coating to expand up to 100% from its unheated volume binding the pin to the structural elements. A fluted or scalloped edge on the pin increases the surface area of the pin increasing its friction holding force.

Abstract: At least one optical resonator having a selected optical processing property is formed upon a substrate. Various property resonators may be stacked upon one another so as to share a common optical axis. A resonator typically has a pair of multilayer dielectric or semiconductor mirrors formed on opposite ends of an optical cavity with the mirrors formed in a plane parallel to the substrate surface. Temperature and mechanical stability superior to current technology is thus achievable in the structure. Additional combinations of mirrors, cavities and gratings may be formed in conjunction with the resonator.

Abstract: A semiconductor diode laser is aligned to a waveguide with two sections, a first section being a passive low-loss waveguide and a second section being a Bragg grating. The first section works to increase the total cavity length l of the laser by about 1 to 2 cm. The lengthening of the cavity reduces the longitudinal mode spacing .DELTA..lambda. according to the equation .DELTA..lambda.=.lambda..sup.2 /2nl, and provides a higher average output power level because it is substantially immune to mode hop-induced fluctuations. The second section causes the output to be centered at the desired wavelength depending on the grating spacing. An array of diode lasers with an array of waveguides as described above provides a high power source with a controlled bandwidth. The high power laser array with stabilized output wavelength is used to pump a solid state laser crystal.

Abstract: A booster retarding apparatus for an airborne vehicle such as a missile having a separable booster at its rear end, comprises a series of flaps with hinge assemblies for securing the flaps to the aft end of the booster for movement between an inner position extending rearwardly from the booster and an extended position projecting outwardly from the booster. The flaps are biased towards the extended position, and normally retained in the inner position by retaining devices. The retaining devices are released on booster thrust termination, and include a release mechanism responsive to booster thrust termination for releasing the retaining devices. The release mechanism includes a biasing device having a biasing force less than the acceleration forces developed on launch which oppose operation of the release mechanism so that the flaps are held in during booster thrust and are released and urged outwardly on booster thrust termination to brake the booster and separate it from the remainder of the missile.