S.I. Fishgal. Pavement Deflection-Measuring Instrument

Soviet Invention No. 207,445; 1965

From S.I. Fishgal “Highway and Concrete Inventions”
(KDP Amazon, CreateSpace and Lulu publishers)

    NOTE. S.I. Fishgal is the only true inventor of the present invention. A.I. Singer listed herein was the head of Road-Making and Bridge-Building department of the State Automotive and Road-Making Research & Development Institute. Fishgal was an outsider commissioned to check their drawings. When he found errors in their stress calculations and the unworkable design (not related to the present invention), Singer did not intimidate, threatened and sued Fishgal (as Americans and Canadians did years later), but made Fishgal the design group leader of his department. A.B. Sntumberg listed herein as co-inventor too was Singer’s deputy. More about that in http://www.amazon.com/S.I.-Fishgal/e/B004UC4MH6.

ABSTRACT

   A pavement deflection-measuring instrument contains feeler gauges mounted on a beam and provided with a readout devices. For simplifying the design and bettering the precision, the each gauge is executed as a diaphragm pickup with its liquid-filled cavity connected to a tube having a scale for the visual readout of the deflection magnitude display. To set the deflection displays readings to zero, the pickups are connected to a vessel via a valve and a plunger.