Abstract: A livestock feeder has a trough bed and a bin for storing and dispensing feed mounted above and spaced from the bed, the bin being collapsible onto the bed for facilitating shipment and storage of the feeder. When the bin is collapsed onto the bed, the livestock feeder can support a payload without damage to the collapsed bin. The feeder may include wheels to define a wagon bunk-type feeder, wherein the feeder can be converted to other uses when the bin is in the collapsed position.

Abstract: A self-unloading bale box has a conveyor mounted in the floor of the box along one side. The conveyor is covered by a series of covering plates that are raised to expose an increasingly larger length of the conveyor as the box is unloaded. The bales are passed to a curved delivery chute.

Abstract: A data bus system includes a plurality of interconnected active terminals, i.e., terminals which receive data from one terminal and retransmit it or transmit new data to another terminal. The data is in serial digital form and is transmitted within a continuous series of time frames of predetermined length with each time frame being initiated by a control word transmitted by one of the terminals designated the controller terminal. Each terminal includes a counter which counts the bits between control words, and each control word includes an identification of the controller terminal so that each terminal can synchronize its counter with the counter at the controller terminal in accordance with the propagation time of data from the controller terminal. Logic circuitry is provided at each terminal so that one of a plurality of terminals can assume the function of the controller terminal should the presently designated controller terminal fail to generate control words to define the time frames.

Abstract: A resolver to digital converter which provides digitally generated sinusoidal voltages to apply to the stator windings of the resolver. The oscillator providing the digital pulses is connected to a counter which is reset on a particular phase of one of the stator winding voltages. The output of the counter is transferred into an output register at a particular phase of the rotor voltage with the output register thereby providing a digital reading of the angular position of the rotor. Digital comparator means are provided for insuring that the stator voltages remain exactly 90.degree. out of phase, and further means are provided for insuring that the stator voltages remain at the same amplitude.