Arrestment
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Arrestment is a general term for devices that protect delicate, sensitive parts of measuring instruments when they are not in use or being transported. In sensitive balances, the arrestment mechanism lifts the beam and separates the sharp edges of the prisms from the steel plates upon which they rest. In certain electrical instruments, it lifts a needle suspended on a fine thread, thus protecting the latter from breaking by relieving its load.
Encyclopedia entry (1928–1936)
ARRESTMENT (from French arrêter - to stop, to detain), a general term for devices protecting delicate, critical parts of measuring instruments when they are in an idle state or being transported from place to place. In sensitive balances, the arrestment lifts the beam and separates the sharp edges of the prisms from the steel plates upon which they rest. In certain electrical instruments, the arrestment lifts the pointer suspended on a fine thread and thus protects the latter from breaking (unloads it).
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“Arrestment.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/arrestment/