Abstract: An optical fiber graded index connector wherein a graded index rod is emped having a bore extending along the longitudinal axis thereof, the ends of the optical fibers to be connected being inserted into opposite ends of the rod bore and positioned to a focal length until a maximum power output is detected at the required destination for which the connection is made.

Abstract: Dual waveguide lasers which are transversely excited in parallel from a con source of radio frequency are provided with one or more channels or bores connecting the laser cavities. The dimensions and configuration of the connecting channels are chosen so that the electric field from the applied RF excitation source will be higher in the connecting channels than in either of the paralleled waveguide gas discharge cavities, or that the electron collision loss to the nearby ceramic and metallic walls will be lower in the connectiong channels than in the aforementioned waveguide cavities. The initial gas breakdown is thus made to preferentially occur in the connecting channels and thus force initiation of both laser cavities simultaneously.

Abstract: A stripline transformer pulse generator includes a flat ribbon multiple conductor cable and a ground plane of electrically conductive material placed side-by-side and wound together in a coil to form a transformer. The extremities of at least some of the conductors are joined in parallel and connected to a load. A voltage supply and switch connected between the ground plane and one end of the cable brings about charging and discharging of the device.

Abstract: The apparatus is part of an optical radar set and comprises a high powered O.sub.2 pulsed transmitter laser which is injection controlled to operate at a fixed frequency offset from a lower powered CO.sub.2 local oscillator laser. A portion of the output of the local oscillator laser is applied to an acousto-optic Bragg cell, together with an RF signal equal to the desired intermediate frequency of the radar set. The upshifted first order output of the Bragg cell is injected into the transmitter laser for stabilization purposes. This results in a stable intermediate frequency for the optical radar set.

Abstract: A long lived high current density cathode is made from a mixture of tungs and iridium powders by processing the mixture of powders with an activator into a porous billet, and then impregnating the billet with a chemical mixture of barium oxide, strontium oxide, and aluminum oxide by firing the billet in a dry hydrogen furnace at a temperature at which the impregnant melts.

Abstract: A magnetic circuit with a frustum-shaped magnet having a longitudinal bore nd circumscribed by a cladding magnet of varying radial thickness with a non-linear outer exterior surface. The cladding magnet is radially magnetized and the frustum-shaped magnet is axially magnetized, resulting in a constant magnetic potential along the non-linear outer exterior surface of the cladding magnet. A laterally uniform longitudinally increasing magnetic field is created within the bore.

Abstract: Two cosited omnidirectional biconical antennas are respectively tilted plus nd minus 45 degrees (.+-.45.degree.) with respect to the vertical and, therefore, are perpendicular (90.degree.) with respect to each other to effect polarization mismatch and near field decoupling. In combination with the described antennae orientation, high impedance cable chokes are added in series with the coaxial cable antennae feed lines to suppress induced parasitic rf currents.

Abstract: A rotating disk electrode of a soft alkali metal reactive to oxygen and mture in the air is made from a stainless steel core, a tubular Teflon sheath, a circular disk electrode of the soft alkali metal, a self-tapping stainless steel screw to secure the soft alkali metal electrode and a steel spring to provide electric contact to the soft alkali metal electrode.

Abstract: The conventional way of achieving an identification, friend or foe (IFF) function for a moveable subject requires the subject to carry a transponder that emits a coded return when a radar pulse is received by its receiver. In the present invention, an IFF system is disclosed which departs from the conventional transponder method and employs no radio-frequency power source. Instead, it uses the scattering or reflecting properties of an antenna to modulate, in a distinctive manner, the radar return from a moveable subject. A binary sequence code generator modulates the impedance of a receiver antenna, with the reflected signal being detected and correlated with a synchronized code sequence at the radar.

Abstract: A magnetic circuit with a remanence varying cylindrical magnet having a b and a remanence varying cladding magnet circumscribing the cylindrical magnet creating a longitudinally increasing axial magnetic field within the bore. The cladding magnet has a radial magnetization transverse to the axial magnetization of the cylindrical magnet resulting in a constant magnetic potential along the outer exterior surface of the magnetic circuit.

Abstract: Solid state optically activated switches in which a plurality of spaced cacts are arranged in a line on one of the broad surfaces of a semiconductor wafer and one or more bridging electrodes are arranged on the opposite broad surface thereof. The two end contacts are the switch terminals. This arrangement directs the electric field and the load current into the bulk of the semiconductor in a zig-zag fashion to provide a high hold-off voltage and a short conduction path. Also the bridging electrode can be used as a control electrode. A novel circuit utilizing such switches is shown.

Abstract: A phase-scan antenna apparatus including a rod-shaped ferrite dielectric eguide having two non-ferrite dielectric ends, and means for applying a variable magnetic field to the ferrite section.

Abstract: A lithium-sulfur-dioxide battery (e.g., the BA5847/U) is modified so that can be used both in its customary manner or as a substitute for a standard Leclanche battery (e.g., the BA210/U). Since the aforementioned batteries typically have their connectors at different, distinct locations, the first-mentioned battery is provided with a second set of connectors (i.e., female sockets) which are located at the very same position as the connectors of the battery it may be substituted for. Thus, this battery has two sets of (2-hole) connectors and these are, in turn, interconnected in parallel.

Abstract: A circuit module rapidly calculates a discrete numerical convolution. A convolution such as finding the sum of the products of a 16 bit constant and a 16 bit variable is performed by the module which is programmable so that the constant may be changed for a new problem. In addition, the module may be programmed to find the sum of the products of 4 and 8 bit constants and variables. Random access memories are loaded with partial products of the selected constant and all possible variables. Then, when the actual variable is loaded, it acts as an address to find the correct parital product in the particular RAM. The partial products from all of the RAMs are shifted to the appropriate numerical power position (if necessary) and then added in adder elements.

Abstract: An interconnector device permits a lithium-sulfur-dioxide battery (e.g., BA5847/U) to be substituted for a standard Leclanche battery (e.g., the BA200/U). The lithium-type battery can therefore be used in its customary manner or, with the interconnector, as a substitute for the Leclanche battery; battery proliferation is thereby reduced. The interconnector comprises a rectangular wafer of plastic material with a pair of prongs mounted on one flat surface of the wafer and at a location which corresponds to that of female sockets of the lithium-type battery. A pair of coil spring connectors are mounted on the opposite flat surface of the wafer and at locations which correspond to the locations of the coil spring connectors of the Leclanche battery. The prongs and coil spring connectors of the interconnector are electrically interconnected in parallel.

Abstract: A system of lasers which produces a single pulsed laser beam carrying many channels of digital information simultaneously. The information content of each laser output pulse is determined by the presence or absence of one or more input signal channel frequencies. The presence or absence of each frequency is provided by a plurality of low power CW lasers operating at different frequencies and which are selectively gated in a binary fashion by pulse coded digital input signals to provide digitized low power laser outputs in accordance with the digital input signals. The low level pulses of the various optical frequencies are combined and utilized to preload a relatively high power pulsed CO.sub.2 output laser. A pair of mirror assemblies are utilized to respectively combine the multifrequency channel pulses and transmit a single pulsed output laser beam generated by the pulsed output laser.

Abstract: This disclosure relates to a microwave amplifier (22) having an active X-Band microwave cavity (33) for use in electron paramagnetic resonance (EPR) measurements on large, lossy, irradiated, samples such as a human finger. The amplifier comprises an input section (31), a drift section (32) and an output section (33) which is the aforementioned active microwave cavity. An electron beam is used to input RF energy into the cavity. The input and output section have small helical couplers (34) for coupling RF energy onto and off of the electron beam. The RF wave is essentially "trapped" in the cavity because of the non-reciprocal nature of the electron beam medium and because the guide (i.e., drift section) at the input to the cavity has dimensions such that the frequency of the RF microwave energy is below the guides lower cut-off frequency. Also, a frequency "locking" effect occurs in the output cavity. The input frequency can be varied from 1-2% yet the output frequency does not change.

Abstract: Incoming radio frequency signals from one or more remote transmitters, that may be changing or "hopping" in frequency, are received at two closely spaced antennas. A pair of Chirp-Z transform processors are respectively coupled to said antennas. The transform processors are operated in synchronism and produce a pair of sampled comb filter output responses, each of which comprises a multiple of frequency "bins" distributed over a given spectrum. The bins are read out of the Chirp-Z processors in a synchronous sequential order, and each bin is represented by a pair of signals in phase quadrature. The phase quadrature signals of corresponding bins are multiplied in a predetermined manner and the products thereof are selectively added and subtracted to provide a predetermined function (tan .PHI.) of the phase difference (.PHI.) between the signals incident on the pair of antennas. This predetermined function is coupled to a processor that calculates a trigonometric function (sin.sup.

Abstract: The beam of a laser radar is moved over the field of view by means of a p of scanner/trackers arranged in cascade along the laser beam. One of the scanner/trackers operates at high speed, with high resolution and a narrow field and is located in the demagnified portion of the laser beam. The other scanner/tracker operates at low speed with low resolution and a wide field and is located in the magnified portion of the laser beam. The two scanner/trackers complement each other to achieve high speed, high resolution scanning as well as tracking of moving targets. A beam steering telescope for an airborne laser radar which incorporates the novel dual mode scanner/tracker is also shown.

Abstract: The linear algorithm described differs from other artificial intelligence ograms in its operation over a continuous representation. In the algorithm, the size of the exponent is tied to the magnitude of the learning base employed, and the design thus becomes more selective as the learning base grows. With it, "run time" and "chip size" can be analyzed in substantially linear time.