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    • 1. 发明授权
    • Multi-beam cathode ray tube having equalized line brightness
    • 具有均衡线亮度的多光束阴极射线管
    • US3930120A
    • 1975-12-30
    • US55577475
    • 1975-03-06
    • HUGHES AIRCRAFT CO
    • KELLER BRUCE WHOFFMAN WILLIAM CHERMAN ELVIN E
    • H04N3/28H04N5/19
    • H04N3/28
    • A system for producing a raster display having uniform line brightness is disclosed which is especially suitable for multibeam cathode ray tubes. A multi-beam or multi-gun cathode ray tube having N beams for painting N lines at a time to develop a first raster beginning at a first display line position. Subsequent rasters are developed by painting the same N number of lines at a time with a first line of that raster being scanned at a line position that is displaced between 1 and N-1 lines from the first line position painted in the preceding raster. The parallel input sources to the N beam is multiplexed for maintaining the video display at the proper position. That is, a line of input data is always presented on its corresponding display line position on the screen during successive rasters. By shifting the beams in each subsequent raster and by correspondingly switching (multiplexing) the input video data to the appropriate beams for each subsequent raster, the display appears to the eye to have a substantially uniform average line brightness. The invention herein described was made in the course of or under contract or subcontract thereunder (or grant) with the Department of the Navy.
    • 公开了一种用于制造具有均匀线亮度的光栅显示器的系统,其特别适用于多光束阴极射线管。 一种具有N个光束的多光束或多枪阴极射线管,用于一次绘制N行以从第一显示线位置开始形成第一光栅。 随后的光栅通过一次绘制相同的N条线而开发,其中该光栅的第一行被扫描在从先前光栅中绘制的第一线位置在1和N-1线之间移位的线位置处。 多路复用用于N波束的并行输入源,以将视频显示保持在适当的位置。 也就是说,在连续光栅期间,一行输入数据总是在其对应的显示线位置上呈现在屏幕上。 通过在每个随后的光栅中移动光束并且通过相应地将输入视频数据切换(多路复用)到每个后续光栅的适当的光束,显示器对眼睛呈现为具有基本均匀的平均线亮度。 本文所述的发明是在与海军部合同或分包合同(或授予)下进行的。
    • 4. 发明授权
    • Apparatus and method utilizable in forming metal grids
    • 用于形成金属网格的装置和方法
    • US3659510A
    • 1972-05-02
    • US3659510D
    • 1969-05-01
    • HUGHES AIRCRAFT CO
    • GARVIN HUGH LHERMAN ELVIN ELAW RUSSELL RTURK ROGER R
    • G03F7/22H01J9/14G03B29/00
    • H01J9/14G03F7/22
    • Apparatus and method for forming metal grids. The apparatus includes a support, carriage, photomask, photolamp, and interferometer. A photographic plate is positioned on the support and the photomask is attached to the carriage which is translated to thereby carry the photomask across the photographic plate. The interferometer allows repetitive exposure of the plate by the photolamp via the photomask by measuring the position of the carriage and by controlling a photolamp trigger circuit for flashing the photolamp when predetermined carriage positions are sensed by the interferometer. The photomask contains a single slit through which light rays from the photolamp pass whereby the successive flashing of the photolamp is operative to form a pattern of parallel, closely spaced image patterns in the photographic plate. The thus exposed photographic plate is developed and the resultant photographic master is replicated in a sequence of steps resulting in the formation of a metal grid on a target substrate. Salient features of the apparatus and method contribute to the successful provision of metal grids characterized by substantially uniform spacing between parallel adjacent grid lines which increases the range of applications in which the grids can be utilized.
    • 用于形成金属网格的装置和方法。 该装置包括支架,托架,光掩模,光电管和干涉仪。 照相板定位在支撑件上,并且光掩模附接到滑架,滑架被平移,从而将光掩模携带在照相板上。 干涉仪允许通过光掩模通过测量滑架的位置并通过控制用于在由干涉仪感测到预定的滑架位置时闪光照明灯的照明灯触发电路,通过光掩模重复地曝光该光板。 光掩模包含单个狭缝,来自光电管的光线通过该狭缝通过,由此照相灯的连续闪烁可操作以在照相板中形成平行,紧密间隔的图案图案。 将如此曝光的照相板显影,并且所得照相母版以一系列步骤复制,导致在靶基底上形成金属网格。 该装置和方法的显着特征有助于成功地提供金属网,其特征在于平行的相邻网格线之间的基本上均匀的间隔,这增加了可以利用网格的应用的范围。
    • 5. 发明授权
    • Radar signal phase correction
    • 雷达信号相位校正
    • US3703005A
    • 1972-11-14
    • US3703005D
    • 1965-06-21
    • HUGHES AIRCRAFT CO
    • HERMAN ELVIN ELYM VERNON WMCCORD HENRY L
    • G01S7/288G01S13/534G01S7/28G01S9/02
    • G01S7/288G01S13/534
    • 19. In a radar circuit of the type including a transmitter section having a circuit for generating and transmitting pulsed rf oscillatory signals, a receiver section having a circuit for detecting echo signals, the combination therewith of: a means for generating a clock reference signal; means coupled to receive a portion of the pulsed rf oscillator signals generated by the transmitter and coupled to receive the clock reference signal for detecting phase differences between the transmitted signal and the clock reference signal and for generating an error signal that is proportional to a function of the detected phase differences therebetween; means coupled to receive the error signal for storing the received error signal during the interpulsed period between transmitted pulse signals; a stable local oscillator means in the receiving section for generating a c-w output signal; phase shifter means coupled to receive the stable local oscillator output signal and to receive the error signal for phase shifting the local oscillator output signal to remove phase variations in the local oscillator output signal relative to the transmitted signal resulting from rf starting phase variations in the transmitted pulses; and means for receiving the echo signals and for receiving the phase shifted local oscillator signals for producing a coherent echo signal.
    • 7. 发明授权
    • Cathode ray tube having radially directed commutator elements
    • 具有辐射方向的通信器元件的阴极射线管
    • US3579013A
    • 1971-05-18
    • US3579013D
    • 1969-01-08
    • HUGHES AIRCRAFT CO
    • HERMAN ELVIN E
    • H01J31/06H01J29/78
    • H01J31/06
    • A focused electron beam is circularly deflected. It is directed at a commutator target and passes through a positive collector mesh. The target comprises a plurality of separate, conductive spokes. Alternate spokes are connected together and serve as a shield electrode, which is held slightly positive with respect to the cathode. The remaining alternating spokes are grouped with three to five of the spokes being connected together to form an input channel. Input channel level ranges are typically from - 5 volts to zero, so that when a group is more negative, the electron beam is prevented from landing on the shield electrode, and is returned to the collector grid or mesh. When an input is near zero volts, a large percentage of the electron beam lands on the shield electrode. Thus, between these values, electron beam current returning to the collector mesh is modulated by the input signal levels applied to the various spoke groups. In this manner the voltage levels on the different sets of input spokes are commutated as the electron beam is circularly deflected. The commutated signal can be read as collector mesh current.
    • 9. 发明专利
    • COMB FILTER PRESSURE TEMPERATURE SENSOR
    • CA1292777C
    • 1991-12-03
    • CA591807
    • 1989-02-22
    • HUGHES AIRCRAFT CO
    • HERMAN ELVIN ELIKES BART E
    • G01D5/26G01B9/02G01D5/353G01K11/12G01L1/00
    • COMB FILTER PRESSURE/TEMPERATURE SENSING SYSTEM A sensing system having a wideband optical source for providing optical illumination having a bandwidth of at least 25 nanometers, and an optical fiber cable for transmitting the optical illumination to a remote location. A transducer responsive to the transmitted optical illumination amplitude modulates the transmitted optical illumination as a function of a monitored physical parameter (for example, pressure or temperature) to provide an amplitude modulated optical illumination having generally sinusoidally varying nulls across the spectrum thereof, the frequency of the nulls varying across the spectrum of the modulated optical illumination and being a function of the monitored physical parameter. The fiber optic cable (or another fiber optic cable, depending on the transducer implementation) transmits the modulated optical illumination to an optical spectral analyzer which provides a spectrally dispersed optical signal indicative of the spectral content and amplitudes of the modulated optical illumination. A clocked detector array responsive to the spectrally dispersed optical signal is clocked at a varying clock rate to remove the frequency variation of the periodic nulls across the optical spectrum, so as to provide an electrical signal having a substantially constant frequency of the nulls. Narrowband filtering circuitry filters the electrical signal of substantially constant frequency to provide a filtered signal, and output circuitry responsive to the filtered signal provides an output signal indicative to the substantially constant frequency of the periodic nulls.
    • 10. 发明专利
    • DE2610304A1
    • 1976-11-18
    • DE2610304
    • 1976-03-12
    • HUGHES AIRCRAFT CO
    • WILLIAMS FREDERICK CHERMAN ELVIN E
    • G01S7/02G01S7/14G01S13/00G01S13/87H01Q3/26H01Q3/22
    • 1530639 Radar; aerials HUGHES AIRCRAFT CO 2 March 1976 [24 March 1975] 08353/76 Headings H4D and H4A The radar system described in Specification No. 1,405,241 is modified to allow provision for improving the focus of the receiving antenna for targets at close ranges where the curvature of the incident wavefront cannot be neglected, by varying the frequency of the local oscillator in a predetermined manner, for a time, after transmission of a pulse, corresponding to a predetermined number of range bins as far as a maximum range for which focus compensation is provided and thereafter holding the L.O. frequency constant, the distribution of path lengths from the L.O. to the elements of the aerial array and hence the phasing of each element being arranged to follow a quadratic function. The phasing of the elements is approximated to the correct curve for an incident circular wavefront which is kt [1 - cos x / KI ] where t is the time variable, x is the distance from the array centre and k is a constant, by using the first term x 2 /2kt, of the Taylor Series expansion of the aforementioned expression which latter term is a separable function and is constituted in the invention by varying the L.O. frequency as 1 / l and varying the phase distribution of the signals through the variously lengthed element feeds as the quadrattic function x 2 . Hence the phase distribution along the antenna elements varies parabolically to approximate a circle whereby the phase shifters along the array focus on a plane wave and, as the local oscillator frequency decreases as a function of '/, the array focuses on a steadily increasing range. In Fig. 13, a pulse 520 is transmitted and the receiver is activated, the L.O. frequency being f 2 , e.g. 1 microsecond later. The L.O. frequency then decreases as per curve 522 until it reaches a second frequency, which is then held constant for the rest of the range and corresponds to reception of a plane wave along the array until the time of maximum range. This process is then repeated at the system p.r.f. The phase distribution produced by the arrangement of the feed lines 159 in Fig. 3a, may be produced by having the branch points nonsymmetrically placed to provide the parabolic path length variation.