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  • [发明专利]US19730349268 _ MACOVSKI A,US 1973年04月09日
  • [发明专利]US19730350719 _ THOMSON-CSF 1973年04月13日
    The present invention relates to systems which utilise a very thin electron beam (diameter one-tenth of a micron or less) to reach a point upon a given surface or to write-in an information there or to read one information therefrom. The object of the...
  • [发明专利]US19730391441 _ COMBUSTION ENGINEERING, INC. 1973年08月24日
    The invention is a multi-sensor radiation detection system including a self-powered detector and an ion or fission chamber, preferably joined as a unitary structure, for removable insertion into a nuclear reactor. The detector and chamber are connecte...
  • [发明专利]US19730393772 _ RAYTHEON COMPANY 1973年09月04日
    An extended radiating aperture for X-rays is provided by means of a stationary target of a heavy metal positioned for uniform illumination by high speed electrons emanating from a cathode and accelerating through a difference of potential between the ...
  • [发明专利]US19730399276 _ HONEYWELL INC. 1973年09月20日
    A retractable hot center contact for a foot attachment of a photographic flash light unit having a spring biasing means mounted for movement within the attachment, a first end portion of the spring biasing means is retained against movement by the foo...
  • [发明专利]US19730337175 _ SIEMENS AG,DT 1973年03月01日
    Neutron flow density distribution is determined in a nuclear reactor by a device which includes two electrodes for measuring the current flowing between such electrodes. This current, based on beta radiation, is proportional to the neutron flow densit...
  • [发明专利]US19730360223 _ RAYTHEON CO,US 1973年05月14日
    A nuclear imaging system for mapping the source of high energy nuclear particles from a living organ which has selectively absorbed a radioactive compound by spatially coding the energy from the source in a Fresnel pattern on a detector and decoding t...
  • [发明专利]US19730392754 _ U. S. PHILIPS CORPORATION 1973年08月29日
    X-ray apparatus provided with an excessive-size indication which gives a signal to the radiologist when the cross-sectional area of the beam used for fluoroscopic examination exceeds the size of the radiograph to be made.
  • [发明专利]US19730425843 _ BBC BROWN BOVERI & COMPANY LIMITED 1973年12月18日
    A turbine by-pass arrangement for use in thermal power plants serves to by-pass a portion of the steam delivered by the steam generator around the turbine and discharge it into the coupling sleeve located between the turbine outlet and the condenser i...
  • [发明专利]US19730390347 _ CATERPILLAR TRACTOR CO. 1973年08月22日
    A guard assembly comprises separable upper and lower covers detachably mounted on the frame of a track-type vehicle to form tunnel portions for shielding and protecting the drive motors and attendant conduits thereof. The lower cover comprises a centr...
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