THE BALL INDICATOR

BALL INDICATORIf, during the filling of high capacity water (e.g. drums) intended for watering the garden, throwing a rubber ball of small size, its appearance over the edge of prompts to close the valve. Thereby eliminating the need for constant monitoring of the level of a cursory glance.

 

N. SVIRIDENKO, p. Pervomayskiy, Kazakhstan

Recommend to read

  • GLIDES… CARGLIDES… CAR
    Curious glances accompany this crew everywhere. And it’s not surprising - it looks too unusual in the traffic... a boat on wheels. We are talking about a vehicle that exists so far in a...
  • THE JET SYSTEM OF VOLLEY FIRE “GRAD”THE JET SYSTEM OF VOLLEY FIRE “GRAD”
    During the great Patriotic war of the Soviet rocket artillery has proved itself as a powerful weapon on the battlefield. Then the front got more than 10 thousand multiply launchers...