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A kissing shield comprised of a thin, flexible membrane and a frame or holder.
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| Number | Title | Issue Date |
| 4691209 | Wideband antenna A wideband antenna with reduced diameter and volume compared to prior art tennas and having non-critical dimensions resulting in ease of manufacture and tolerance to damage in portable applications and during installation. In one embodiment the antenna is... | 09/01/1987 |
| 4523185 | Zoned intrusion display with series-connected sensors A visual display system detects and continuously displays the location of a breach in a protected building or secure area. Each of a plurality of exclusive OR gates is connected to a separate reed-type sensor switch. Each exclusive OR gate output is conne... | 06/11/1985 |
| 4245321 | Rotating raster generator A raster generator for producing a raster-type display on a random scan dlay terminal where the raster can be oriented at any selected angle of rotation. The rotating raster generator responds to a digital input signal representing the desired angle of r... | 01/13/1981 |
| 4210881 | Millimeter wave microstrip triplexer A planar millimeter wave microstrip triplexer for separating three contigs bands of frequencies (lower, middle and upper bands). The middle band is separated by the use of a diplexer comprising two quadrature couplers connected by dual identical planar b... | 07/01/1980 |
| 4201988 | Wideband VHF antenna A wideband VHF antenna operable simultaneously on multiple frequencies hag an instantaneous bandwidth greater than one octave and having a total length less than one-quarter wavelength at the lowest operating frequency. A wideband impedance transformer i... | 05/06/1980 |
| 4199809 | Programmable data terminal set An operator console, a general purpose digital computer and a radio set irface are connected to perform the modulation and demodulation of the differential coherent quadrature phase shift signal used to transmit the digital information over a computer-to... | 04/22/1980 |
| 4181892 | Sweeping noise blanker A noise rejection circuit for a communications receiver in which the input o the receiver is continually sampled by a sweeping heterodyne oscillator to develop a difference frequency noise signal which represents the input noise over a wide frequency band.... | 01/01/1980 |
| 4168479 | Millimeter wave MIC diplexer A millimeter wave MIC diplexer constructed in either stripline or microstrip comprising two edge coupled bandpass filters separated by specific lengths of transmission lines designed to separate two bands of frequencies. Input signals having frequencies w... | 09/18/1979 |
| 4156242 | Light-weight low-cost antenna element An antenna array comprising a plurality of antenna elements formed from ml-clad boards and conductive pins. Two metal-clad boards are placed together to form a sandwich, the metal-clad surfaces of the boards forming the top and bottom walls of a waveguid... | 05/22/1979 |
| 4147942 | Fast recovery one-shot A video-blanker system for supplying blanking pulses to receivers including a main delay one-shot for responding to a pretrigger pulse and establishing a time delay in response thereto by providing an output pulse of a predetermined width and an auxiliary... | 04/03/1979 |
| 4144534 | Battlefield IFF system A battlefield identification friend or foe (BIFF) system comprising a radar nit including a switch for selectively connecting an interrogation encoder to the modulator of a radar unit and a response decoder also located at the radar site. At a remote stati... | 03/13/1979 |
| 4110715 | Broadband high pass microwave filter A broadband high pass microwave filter and method of manufacturing thereof hat maximizes the frequency separation between the desired passband of the filter and spurious passbands. A strip of dielectric material has alternately spaced capacitor plates form... | 08/29/1978 |
| 4110697 | Digital bypassable register interface An interface for transmitting data in either a clock edge triggered synchous transmission mode or an asynchronous transmission mode. An edge triggered register has its input connected to a source of digital data and its output connected to a two-to-one m... | 08/29/1978 |
| 4108400 | Dual mode guidance system A dual mode missile guidance system employing a passive anti-radiation ser for midcourse guidance and an alternate sensor for terminal guidance. A broadband, body mounted conformal antenna comprises the midcourse sensor, and the alternate sensor is mount... | 08/22/1978 |
| 4079372 | Serial to parallel converter A serial to parallel converter receives a succession of digital bits in serial form comprising discrete data formats and control formats through its input terminal, which is coupled to a data shift register and to a control shift register. When a data for... | 03/14/1978 |
| 4075622 | Variable-to-block-with-prefix source coding technique A method and apparatus for data compression which utilizes a random walk ough Pascal's triangle which is directed by the incoming random source sequence. The random walk starts at the apex of Pascal's triangle and proceeds downward according to an algori... | 02/21/1978 |
| 4075703 | Recursive filter mean-level detector An apparatus for estimating the mean level of a stochastic process such as ould be observed at the output of a radar, communications, or sonar receiver and for using the mean level to provide a threshold with which possible signal samples are compared to d... | 02/21/1978 |
| 4072956 | Multifrequency array using common phasors A single antenna array having a phase shifter at the input of each antenna lement and fed by a multifrequency input for simultaneously generating at least two beams. When the different excitation frequencies are simultaneously inputted into the phase shift... | 02/07/1978 |
| 4064360 | High speed digital switch A switching system for rapidly configuring transmission paths between comer equipments for high speed digital information in parallel form couples the input of a parallel-to-serial (P/S) converter to the output of each equipment providing information and... | 12/20/1977 |
| 4063291 | Apparatus and method for encoding and decoding digital information An encoding system wherein digital information comprising data, clock, and artitioning components is coupled to an encoding means comprising interconnected digital elements to generate a serial encoded signal having the encoded data, clock, and partitionin... | 12/13/1977 |
| 4063186 | Broadband millimeter wave amplifier A millimeter wave amplifier having broadband characteristics in which a G diode or other two terminal negative resistance device having an integral heat sink is center mounted in a reduced height waveguide. The heat sink is attached to a mechanism for se... | 12/13/1977 |
| 4051390 | Parallel/time-shared variable time delay generator with common timing control and fast recovery A video-blanker system for supplying blanking pulses to receivers including main delay one-shot for responding to a pretrigger pulse and establishing a time delay in response thereto by providing an output pulse of a predetermined width and an auxiliary d... | 09/27/1977 |
| 4044271 | Monolithic NTDS driver and receiver A voltage level shifting driver and receiver for interfacing systems using ositive logic levels and systems using negative logic levels. The driver operates to convert positive voltage logic levels to negative voltage logic levels and the receiver operates... | 08/23/1977 |
| 4044303 | Microwave radiation detector A microwave or other r.f. radiation detector in which a tunnel diode or other negative resistance device exhibiting the proper I-V (current-voltage) characteristics is biased in the positive resistance region near the voltage point at which the peak curre... | 08/23/1977 |
| 4032849 | Planar balanced mixer/converter for broadband applications A broadband millimeter wave (26.5-40 GHz) mixer/converter utilizing slotl and coplanar strip-line for the construction of the hybrid junction. The RF and local oscillator signals are applied 180° out of phase to a pair of beam-lead diodes. A diplexer co... | 06/28/1977 |
| 4032767 | High-frequency CCD adder and multiplier A device for implementing the arithmetic operations of addition and multication utilizing CCD concepts and MOSFET properties. First and second CCD channels convert first and second input voltages into first and second charge quantities, respectively. The... | 06/28/1977 |
| 4028708 | Antenna feed for dual beam conical scan tracking radar An improved antenna feed providing control of the plane of polarization ecially useful with "scanning with compensation" radar tracking. An input transducer is coupled to first and second output transducers whereby the output transducers transmit two pen... | 06/07/1977 |
| 4023028 | Method and apparatus for computing the discrete Fourier transform recursively A wholly digital system for computing the discrete Fourier transform of sequentially received data in a recursive fashion. Two parallel shift registers store and shift the real and imaginary components of the complex number Xk + iYk.... | 05/10/1977 |
| 4023123 | Microstrip reverse-phased hybrid ring coupler A microstrip hybrid directional coupler in which the 180° phase sh is effectuated by a twisted pair of parallel conductors.... | 05/10/1977 |
| 4017864 | Mode-launcher for simulated waveguide A mode-launcher, waveguide antenna element providing signal transition from principal coaxial TEM-mode to a dominant TE01 -mode of a rectangular waveguide. A triangular element integrally formed with the waveguide structure and whose plane is n... | 04/12/1977 |
| 4015252 | High speed serial data synchronization scheme A serial-to-parallel data conversion and synchronization scheme in which a lurality of active logic elements are utilized as delay lines. Each of the delay lines introduces a delay equal to the period of one data bit and one additional delay line introduce... | 03/29/1977 |
| 4006303 | Filtered transition distortion channel quality monitor A system for measurement of teletype or other communication channel quality herein the bit signal element duration is divided into m subintervals. A plurality of transition counters are provided such that each transition counter counts the number of DC tra... | 02/01/1977 |
| 4002834 | PCM synchronization and multiplexing system A system for communicating digital data which utilizes a synchronization eme in which a transmitter transmits a binary 1 followed by n data bits which are followed by n + 1 binary 0's and in which a receiver is synchronized with the transmitter by genera... | 01/11/1977 |
| 3993966 | In-line waveguide to coax transition A transition apparatus for changing from a waveguide to a coaxial connect A tapered or stepped ridge waveguide section is electrically connected to a section of microstrip which is electrically connected to a coaxial connector, the coaxial connector bein... | 11/23/1976 |
| 3977004 | Aircraft VLF/LF/MF window antenna receiving system Apparatus for receiving the horizontal and vertical electric field compons of incoming VLF, LF, and MF (10 KHz to 3000 kHz) signals that is easily portable and installed within minutes aboard aircraft with windows. A sheet of metal or matrix of interconn... | 08/24/1976 |
| 3977003 | Conformal helmet antenna An antenna which conforms to the surface of a non-metallic helmet for man-the-move communications. A metallic electronics housing mounted on the helmet and judiciously arranged antenna fingers comprise the radiating structure which is operable over a wid... | 08/24/1976 |
| 3969691 | Millimeter waveguide to microstrip transition A waveguide to microstrip transition apparatus in which a waveguide coupled o a microstrip circuit is provided with a mode filter for suppressing spurious modes of electromagnetic signal propagation. The mode filter is attached to the end of the waveguide ... | 07/13/1976 |
| 3961274 | Noise riding threshold A network for sensing video noise power over a wide dynamic range and outting a voltage proportional to that noise power. The input signal is filtered, inverted and rectified to separate the noise component from the signal. The noise component is then co... | 06/01/1976 |
| 3958109 | Universal modularized digital controller A modularized digital controller which serves as a means of achieving dync compensation and also acts as an interfacing device in a closed-loop digital servo-control configuration. The controller incorporates four functional modules, the first of which i... | 05/18/1976 |
| 3956706 | Miniaturized millimeter wave instantaneous frequency discriminator A microstrip instantaneous frequency discriminator operable at frequencies bove 18GHz. A first power divider divides the input signal into equal power outputs which are used as the inputs to second and third power dividers. One of the outputs from each of ... | 05/11/1976 |
