Abstract: An apparatus and method is disclosed for sensing material build-up, such as the undesirable build-up of cotton in a mechanized cotton harvester. A tube is mounted for eccentric rotation adjacent an area where build-up occurs, such as near a doffer. The tube is biased by a spring into one position and is eccentrically rotated against the spring by forces applied to the tube by accumulating material, such as cotton. A switch is mounted within the tube, and, as the tube rotates, the state of the switch changes in accordance with the rotation. A signal generated by the switch is used to alert an operator.

Abstract: A circuit is provided for a seed sensor which includes a light source and a light responsive element respectively positioned along a path of travel of seeds for producing a momentary change in signal level from the light responsive element in response to a momentary change of level of light incident thereupon from the light source due to the passage of one or more seeds therebetween. In accordance with the invention, the circuit comprises a pulse-producing circuit responsive to the change in signal level from the light responsive element for producing a discrete pulse signal in response to each change in the direction of the change in signal level. Predetermined ones of the discrete pulse signals are selected for counting.

Abstract: A seed monitoring apparatus for use with a seed planting machine includes a seed sensor comprising a housing forming a substantially tubular passageway and mounting a light source and three photosensitive elements arranged substantially in a triangular configuration. The arrangement of the light source and the triangular photosensor configuration is such that a seed passing through the tubular passageway will momentarily obscure the passage of light to the photosensor the apex of the triangle, if at all, before obscuring the passage of light to either of the photosensors forming the base of the triangle. The monitoring circuit includes two signal paths in which different methods of counting are used to produce different numbers of pulses in response to signals from the three photosensors. One or the other of these signal paths is selected automatically in accordance with the rate at which seeds are detected.

Abstract: A monitoring apparatus for simultaneously monitoring a plurality of functions of a machine, such as a multi-row seed planting machine, includes a programmed microprocessor. A plurality of sensors detect the machine functions to be monitored, and the microprocessor receives and stores data corresponding to the monitored functions from all of the sensors simultaneously. A user accessible control and display panel cooperates with the microprocessor to produce observable indications of the machine functions being monitored in accordance with the stored data as such functions are selected for display by the user. The microprocessor is also programmed to receive and utilize data inputs from the control panel, corresponding to machine parameters of the particular machine with which the monitoring apparatus is being utilized, and data corresponding to the desired maximum and minimum values of the functions to be monitored.

Abstract: There is disclosed a monitoring system for monitoring a plurality of functions or stations in a machine and capable of providing an alarm signal in the event of a failure or significant deviation in any one of the functions, which monitoring system also incorporates electronic circuitry for automatically temporarily disabling the alarm device in the event of a near simultaneous discontinuance or deviation in all of the functions being monitored.

Abstract: A monitoring apparatus for simultaneously monitoring a plurality of functions of a machine, such as a multi-row seed plating machine, includes a programmed microprocessor. A plurality of sensors detect the machine functions to be monitored, and the microprocessor receives and stores data corresponding to the monitored functions from all of the sensors simultaneously. A user accessible control and display panel cooperates with the microprocessor to produce observable indications of the machine functions being monitored in accordance with the stored data as such functions are selected for display by the user accessible control panel. The microprocessor is further programmed to receive and utilize data inputs from the control panel, corresponding to machine parameters of the particular machine with which the monitoring apparatus is being utilized, and data corresponding to the desired maximum and minimum values of the functions to be monitored.

Abstract: A seed sensor detects seeds passing through a chute or housing forming a path of travel for seeds dispensed from a seed planter. A source of light such as a light emitting diode is optically exposed to the path of travel and a photosensitive element such as one or more photoresponsive transistors is optically exposed to the path of travel for receiving the light from the light source. An electronic circuit is connected with the photosensitive element for producing an electrical signal responsive to the light level incident thereupon and producing a change in the electrical signal in response to a momentary change in light level due to the passage of a seed. The electronic circuit includes a circuit element such as a diode connected with the photosensitive element for maintaining at least a given amount of change in the electrical signal output level in response to a given change of light level corresponding to passage of a seed.

Abstract: A calibrated tuneable monitor for use with multi-row planting apparatus includes means for sensing the number of seeds delivered to furrows formed in a field and controlling an indicator to give a visual readout to the operator of the planting apparatus as to whether the number of seeds planted is at least equal to a predetermined minimum value which is preset by a selector dial. The seed monitor system has a DC coupled monostable circuit for producing a pulse of given pulse width for each pulse produced by a seed sensor. The pulse from the DC coupled monostable circuit is then integrated and formed into a voltage which is proportional to the rate at which pulses are received. This voltage is then compared in a voltage comparator circuit to control the operation of an indicator.

Abstract: The embodiment of the invention disclosed herein is directed to a solid state seed sensor which includes a light-emitting diode for directing a quantity of light to a pair of photoresponsive transistors. The light-emitting diode and photoresponsive transistors are maintained within a housing structure wherein all electronic components are mounted, such housing structure being formed of two halves with interconnection between circuit portions being accomplished through sealed passages formed through the housing halves. The light-emitting diode and associated resistor are maintained in one housing half while the remaining electronic circuitry, including the photoresponsive transistors, are maintained in the other housing half.