Abstract: In order to increase the efficiency of a harvesting line of hop vines and in order to eliminate hard work, the transfer of hop vines is controlled starting from their cutting in the hop garden up to their feeding to a picking machine. In order to increase the reliability of functioning, the hop vines are always consecutively seized at a hitherto not damaged place of the stalk. A displaceable rotary storage device can be alternately connected to a trailing device, to a conveying device and to an intermediate storage device provided in front of a dosing conveyer of a picking machine.

Abstract: An automatic firearm such as an automatic pistol having a slide and a thumb-engageable control on each side of the firearm for selectively securing the slide in retracted, inoperative position. This permits the firearm to be operated with equal facility and speed by either a right-handed or a left-handed marksman. A detent for retaining the slide in retracted position is mounted within the frame of the firearm for selective cooperation with a latch. A cross pin mounted for oscillation in the frame of the firearm has a lever mounting the detent fixedly connected thereto. Fixedly connected to one end of the pin outwardly of the frame of the firearm on a first side thereof there is a radially extending first detent control arm. On the other, second end of the pin, on the other side of the frame there is removably attached a second detent control arm, preferably identical with the first control arm, and disposed in the same angular position with respect to the pin.

Abstract: Arrangement for biological activating cleaning of waste waters having a separating space and an activating space, the separating space being disposed above the activating space in a single container. The arrangement permits a surface take-off of cleaned water without reduction of the capacity for water treatment of the arrangement. In case part of the biocenology of the activated sludge becomes extinct or impaired, the arrangement permits an easy removal of sludge separated by floating from the surface of the content of the separating space.