Counting device
First Claim
1. A seed montior for a multiple station planter including a light source adjacent the seed path for each planter station, a pair of spaced light responsive devices in alignment with each light source,means for causing operation of each light source, a pair of pulse generating means, each pulse generating means being connected to one of each pair of light responsive devices for providing a constant width pulse in response to an interruption in light received from the light source, and logic circuit means connected to each pulse generating means, said logic circuit means providing an output signal whenever either pulse generating means provides a pulse at its input.
3 Assignments
0 Petitions
Accused Products
Abstract
A seed monitor for a multiple station planter includes a light source adjacent each seed path and a pair of phototransistors positioned in alignment with each light source. The phototransistors for each seed path are connected to pulse generating means, each of which provide a constant width pulse in response to an interruption in light received by a phototransistor from its light source. An OR gate is connected to the pulse generating means so as to provide an output signal whenever there is a pulse at one of its inputs. The light sources for the multiple seed paths may be operated to periodically monitor each planting station.
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Citations
12 Claims
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1. A seed montior for a multiple station planter including a light source adjacent the seed path for each planter station, a pair of spaced light responsive devices in alignment with each light source,
means for causing operation of each light source, a pair of pulse generating means, each pulse generating means being connected to one of each pair of light responsive devices for providing a constant width pulse in response to an interruption in light received from the light source, and logic circuit means connected to each pulse generating means, said logic circuit means providing an output signal whenever either pulse generating means provides a pulse at its input.
Specification