Abstract: A monitor for use in a multi-row seed planting apparatus is provided for detecting seeds passing from a seed bin to a plurality of seed dispensers and for indicating by row number an improperly operating dispenser. A seed sensor is placed in the seed flow path of each dispenser to provide an output signal indicating that seeds are continuously flowing along the seed flow path through the dispenser. A two-digit seven-segment readout display is provided on the monitor and is coupled to the seed dispenser through logic circuitry which energizes the readout display to indicate the row number of an improperly operating seed dispenser.

Abstract: There is disclosed a signal-seeking, scanning superheterodyne radio receiver operable on all four bands comprising the public service radio frequencies. The receiver uses a single oscillator and appropriately controlled frequency multipliers to generate the required local oscillator signals. Circuitry is included for tracking the radio frequency portions of the receiver to tune them for optimum operation as the receiver is tuned to different portions of the individual bands. The tracking circuitry is responsive to the oscillator circuit and includes two parallel resonant circuits connected in series to generate a d.c. signal varying in amplitude in response to the oscillator frequency. Circuitry is also included for altering the magnitude of the d.c. signal in accord with the band to which the receiver is tuned.

Abstract: A forage conveyor-scale apparatus includes a pivoted conveyor having a differential transformer load cell providing a weight signal. A Hall cell unit is coupled to the conveyor to produce a speed signal. An automatic gain amplifier is controlled by the speed signal to vary the energization of the transformer from an oscillator. The output voltage of the transformer is rectified and averaged to produce a DC analog rate weight signal which is connected to drive a rate weight BCD counter and a total weight BCD counter. The analog signal drives a triggered integrator to form a pulse train driving the total counter. A dual slope integrator is controlled by the analog signal to cyclically control the weight rate counter. A single readout is provided and connected to the rate weight counter. The output of the total counter is forced through the rate weight counter to the readout to display the total count. A comparator may respond to a present input and the total counter to automatically terminate delivery.