обтюра́тор

rare #62998

nounmasculineinanimatecountable

1.
shutter, obturatorcinematography
Обтюра́тор в кинопроекторе перекрыва́ет свет при сме́не ка́дра.
The shutter in a film projector blocks the light while the frame changes.
Technical term in cinematography and optics: the rotating disc that periodically cuts off the light beam.
2.
(rare) obturator, gas seal, gas-checkmilitary
Обтюра́тор не даёт пороховы́м га́зам прорва́ться наза́д.
The obturator keeps the propellant gases from escaping backwards.
In firearms and artillery: the part that prevents propellant gases from escaping through the breech.

Declension