Abstract: A control system and method for chemical injectors includes a controller which outputs multiple feed set point signals and associated driver signals, each set point signal defining a desired injection capacity for a chemical injector and the associated driver designation signal designating the injector to receive the set point signal. A driver assembly is associated with each injector. The driver assembly receives a capacity signal from the injector which defines the volumetric injection capacity of the injector, compares the capacity signal to the feed set point signal, and outputs a drive signal to adjust the volumetric injection capacity of the injector. An adjustment assembly is provided for receiving the drive signal and positioning a stop to limit the reciprocal motion of the piston of the injector, thereby adjusting the volumetric injection capacity of the injector.

Abstract: A nutrient control system for nourishing plants. An injector provides a quantity of nourishment having individual concentrations of specific nutrients. A conduit distributes the quantity of nourishment to the plants. First storage memory stores initial data relating to the plants being nourished. A computer selects the amounts of specific nutrients and selects the quantity of nourishment to be applied to the plants based on the initial data in the first storage memory and, responsive to the selection, controls the injector to adjust the individual concentrations of the specific nutrients and the quantity of nourishment to be supplied to the plants as a function of the selected amounts of the specific nutrients and the selected quantity of nourishment.

Abstract: Apparatus for use in an automated liquid combination and transport system including one or more injectors for injecting liquid additives from various reservoirs into a primary liquid, including a frame having a front, a back and opposing sides. The frame has support columns for supporting the injectors on it. A tank connected to the frame is connected to a tubular input manifold mounted on the frame for carrying the primary liquid and liquid additives into the tank. The input manifold has a plurality of inlets spaced axially of the manifold which may be connected to the injectors which inject liquid additives from the reservoirs into the input manifold through its inlets. The input manifold extends generally side-to-side of the frame and is disposed with its inlets facing generally forwardly with respect to the frame so that its inlets are accessible from the front of the frame.

Abstract: A control system and method for chemical injectors includes a controller which outputs multiple feed set point signals and associated driver signals, each set point signal defining a desired injection capacity for a chemical injector and the associated driver designation signal designating the injector to receive the set point signal. A driver assembly is associated with each injector. The driver assembly receives a capacity signal from the injector which defines the volumetric injection capacity of the injector, compares the capacity signal to the feed set point signal, and outputs a drive signal to adjust the volumetric injection capacity of the injector. An adjustment assembly is provided for receiving the drive signal and positioning a stop to limit the reciprocal motion of the piston of the injector, thereby adjusting the volumetric injection capacity of the injector.

Abstract: An art board support comprising a solid leg plate pivotally attached on one end to the internal rim of a base plate aperture, and on the opposite end, pivotally attached to a U-shaped leg plate, in cross-section. The opposite end of the U-shaped leg plate is secured to the base plate by lateral sliding members. The two legs combined with the base plate form a triad, when in the open position, whereby downward pressure maintains the legs in a locked position. In the closed position, the leg assembly is secured by a latch assembly being recessed in the base plate aperture.