GB903378A - Apparatus for effecting, in a submerged condition, the displacement of a movable member from one position into another - Google Patents

Abstract

903,378. Sampling liquids. PETTERSSON,L. O. June 5, 1961 [June 8, 1960], No. 20168/61. Class 106 (5). [Also in Group XXV] Apparatus for taking samples of water at varying depths comprises a bottle 27 held by a carrier 1 in which two rods 8, 18 are slidable and releasably connected by a permanent magnet 19 on one and a soft iron armature 15 on the other. The upper rod 8 is spring-loaded downwards and connected at 9 to a handling line and the lower rod 18 has soft rubber closure 29 for the bottle 27 which is held between levers 23 pivoted on a nut 22 and clamped on the bottle by screwing the nut on threads 21 so that cam surfaces 20 act on the levers. The apparatus is submerged to the desired depth with the rods separated and the closure 29 sealing the bottle and, by a jerk on the handling line, relative displacement of the carrier 1 and rod 8 causes the two rods to be magnetically interconnected. When the closure 29 is first moved away from the bottle mouth, it deforms slightly so that a slit 35 opens up and allows water to flow into the bottle through a passage 34 to equalize the inside and outside pressures. The closure is thus allowed to release completely from the bottle and the carrier descends relatively to the rods until the magnet 19 engages a shoulder between the two parts 2, 3 of the carrier. When it is estimated that the carrier has been filled, a second jerk on the handling line will separate the two rods, allowing the lower rod to drop and seal the bottle.