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    Method for determining aircraft lift capability using air density measurement
    71.
    发明授权
    Method for determining aircraft lift capability using air density measurement 失效
    使用空气密度测量来确定航空器起飞能力的方法

    公开(公告)号：US3590636A

    公开(公告)日：1971-07-06

    申请号：US3590636D

    申请日：1968-10-25

    Applicant: INDUSTRIAL NUCLEONICS CORP

    Inventor： EDDY WILLIAM C JR

    IPC: B64D43/00 ,  B64D45/00 ,  G01N23/12 ,  G05D1/00 ,  G01C21/00

    CPC classification number: G05D1/0055 ,  B64D43/00 ,  G01N23/12

    Abstract: A lift indicator for either fixed or rotary wing aircraft includes a nucleonic density gauge for deriving a density altitude indicating signal and means for deriving a temperature indicating signal. The signals are nonlinearly combined to derive the lift indication which can be correlated to the ability of a rotary wing aircraft to take off or land vertically or for a fixed wing aircraft to take off from a runway of known length. The density altitude indicating signal is combined with an indicated airspeed signal derived from a pitot tube to derive a true airspeed-indicating signal.

    Electrical property monitoring probe with pneumatic means for maintaining proximity of probe to moving sheet material
    72.
    发明授权
    Electrical property monitoring probe with pneumatic means for maintaining proximity of probe to moving sheet material 失效
    用于保持探头到移动材料的接近性的气体监测探头

    公开(公告)号：US3586972A

    公开(公告)日：1971-06-22

    申请号：US3586972D

    申请日：1968-03-28

    Applicant: INDUSTRIAL NUCLEONICS CORP

    Inventor： TULLENERS HARRY W

    IPC: G01N27/22 ,  G01N27/26

    CPC classification number: G01N27/223

    Abstract: For monitoring the moisture content of strip material such as paper while it is being manufactured or wound, a dielectric gauge probe is provided including concentric, circular or spiral plates, adjacent circular plates or turns of spiral plates being of opposite polarity, the probe being arranged for edgewise presentment of the plates to the moving strip, a hood being provided about the plates. Negative air pressure maintaining apparatus is communicated to the interior of the hood, and through a passage in the probe to the strip of material for maintaining the probe in desired adjacency with a surface of the strip.

    Spectrum analyzer including sampling and scaling means
    73.
    发明授权
    Spectrum analyzer including sampling and scaling means 失效
    光谱分析仪，包括采样和放大仪器

    公开(公告)号：US3581199A

    公开(公告)日：1971-05-25

    申请号：US3581199D

    申请日：1967-09-01

    Applicant: INDUSTRIAL NUCLEONICS CORP

    Inventor： SPITZ DAVID A

    IPC: G01R23/16 ,  G01N23/16

    CPC classification number: G01R23/16

    Abstract: Disclosed is a digital spectrum analyzer wherein the spectral content at a plurality of frequencies wm is computed in response to Fourier transforms at each frequency of an analyzed signal at a plurality of discrete time intervals. The Fourier transforms over each interval are combined to indicate the Fourier transform over the entire interval being considered. A further disclosed feature relates to determining with a specific degree of certainty whether a frequency component is periodic. The determination is made by multiplying average power spectrum density over all the frequencies by a predetermined factor, dependent upon the degree of certainty desired. If the spectral density at a particular frequency is greater than the product, it can be assumed, with the predetermined degree of certainty, that the frequency is periodic. Another disclosed feature concerns automatically scaling the amplitudes of the spectral responses at a plurality of predetermined frequencies, whereby no off-scale readings are obtained.

    Angular tracker responsive to penetrating radiation
    74.
    发明授权
    Angular tracker responsive to penetrating radiation 失效
    反射式射线反射器

    公开(公告)号：US3562528A

    公开(公告)日：1971-02-09

    申请号：US3562528D

    申请日：1967-05-09

    Applicant: INDUSTRIAL NUCLEONICS CORP

    Inventor： JOYCE WILLIAM B

    IPC: G01T1/29 ,  G01T1/16

    CPC classification number: G01T1/2907

    Abstract: Disclosed is a system for deriving a direct digital indication of the position of a penetrating radiation source, e.g., a gammaray of X-ray source. A detector array having multiple channels with the same field of view is irradiated by the source. Each channel includes a different number of radiation-receiving areas to derive the digital indication. The detector array, in certain embodiments, is shielded with a slit plate or shadow mask. In another embodiment, a single multiple detector channel is shielded with a shadow mask and step changes in illumination of each detector drive a position indicating counter.

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