ES93418U - Calculation rule for the communications project by hertzian cables (Machine-translation by Google Translate, not legally binding)
- Google Patents
Calculation rule for the communications project by hertzian cables (Machine-translation by Google Translate, not legally binding)
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Izquierdo Echevarria Luis
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Izquierdo Echevarria Luis
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Publication of ES93418YpublicationCriticalpatent/ES93418Y/en
Calculation rule for the project of communications by hertzian cables, characterized in that on its front has its upper edge a first logarithmic scale representing distances from 0.01 Km to 100 Km, a second scale at its lower edge of decibels ranging from 1 to 50, with three markings Li Ls and ∅, respectively representing the limits of the first and second fresnel zone and the value above the free space of the first reflection lobe; and a third scale, subdivided in turn into two logarithmic scales of direct reading that represent distances in meters from 0.1 to 10,000 and in Km from 1 to 700. (Machine-translation by Google Translate, not legally binding)
ES93418U1962-05-301962-05-30
Slide rule for the Hertzian cable communications project
ExpiredES93418Y
(en)
Automatic medical-health calculator of the concupcional uvaidad of the woman with three circles encromados by its center (Machine-translation by Google Translate, not legally binding)