Abstract: A sensor for measuring the level of free-flowing particulate material in a storage bin comprises an electronic load cell fixedly positionable at the upper end of the storage bin and having a cable suspended therefrom in the storage bin. The lower end of the cable is adjacent the lower end of the storage bin so that the load of the cable alone causes of the electronic load cell to provide a first signal to a process controller indicative of an empty storage bin. The load of the cable plus the downward force of any particulate material in the storage bin on the cable causes the electronic load cell to provide a second output signal to the process controller proportional to the amount of particulate material in the storage bin.

Abstract: A sensor for measuring the level of free-flowing particulate material in a storage bin comprises an electronic load cell fixedly positionable at the upper end of the storage bin and having a cable suspended therefrom in the storage bin. The lower end of the cable is adjacent the lower end of the storage bin so that the load of the cable alone causes of the electronic load cell to provide a first signal to a process controller indicative of an empty storage bin. The load of the cable plus the downward force of any particulate material in the storage bin on the cable causes the electronic load cell to provide a second output signal to the process controller proportional to the amount of particulate material in the storage bin.

Abstract: An improved boom structure is provided which is attachable to a vehicle and includes a boom support member for pivotally supporting a telescopic boom. The telescopic boom includes a generally square outer boom and a generally circular inner boom housed within the outer boom but prevented from rotational movement therein. A first winch is connected to the boom support member with a first cable windingly connected to the first winch. Movement of the first cable from about the first winch controls the pivoting of the telescopic boom through an arc of 180 degrees from a generally horizontal position. A second winch is connected to the boom support member with a second cable windingly connected to the second winch. Movement of the second cable from about the second winch controls the extension and retraction of the inner boom relative to the outer boom. A third winch is also connected to the boom support member with a third cable windingly connected to the third winch.