Technikatörténeti szemle 11. (1979)

TANULMÁNYOK - Petik Ferenc: The development of material testing machines

majority of these maohines were later rebuilt with a pendulum dynamometer [18].

The idea of hydraulic dynamometers had also appreared repeatedly in 19th century testing machine designs. Already in 1850, Whitworth and Co.,

14. Pendulum type paper tensile tester

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15. Rejtő’s cloth testing machine