Electronic controller
OwnerEduard Hermleinventor
Life of this patent
Estimating the term…
Abstract
A signal generator for producing a control signal to control specific operations based upon the angular position of a rotating part in devices such as molding presses. An electrical signal related to the position of the rotating part is generated by using a potentiometer. The signal from the potentiometer is compared in a logic circuit to other adjustable electrical signals. Based upon the results of the comparison a control circuit provides the control signal. Furthermore, monitoring circuits are provided to detect any improper deviation in the electrical signals and upon detecting a deviation in an electrical signal the monitoring circuit provides an error output signal. An interrupter circuit is responsive to each monitoring device and disables the motion of the rotating part upon receipt of any error signal.
Claims28
A device for generating electrical control signals comprising:
- a potentiometer having variable electrical resistance, at least one input terminal, a plurality of output terminals and a plurality of arms in spaced relation;
- a source of operating voltage connected to said input terminal;
- first means connected to said potentiometer for varying the resistance of said potentiometer and providing a first signal at one of said output terminals which varies in response to the resistance of said potentiometer;
- first supply means for providing a second signal for comparison with said first signal;
- second supply means for providing a third signal for comparison with said first and second signals;
- and,
- second means for comparing said first, second and third signals and for providing a control signal having a magnitude dependent on an instantaneous relationship of said first, second and third signals.
A device for generating electrical control signals comprising:
- a potentiometer having variable electrical resistance, at least one input terminal, a plurality of output terminals and a plurality of arms in spaced relation;
- a source of operating voltage connected to said input terminal;
- first means connected to said potentiometer for varying the resistance of said potentiometer and providing a first signal at one of said output terminals which varies in response to the resistance of said potentiometer;
- first supply means for providing a second signal for comparison with said first signal;
- second supply means for providing a third signal for comparison with said first and second signals;
- and,
- second means for comparing said first, second and third signals and for providing a control signal having a magnitude dependent on an instantaneous relationship of said first, second, and third signals comprising:
- a first comparator circuit for comparing said first signal with said second signal and forming a first resultant signal dependent on the relationship of said first and second signals;
- a second comparator circuit for comparing said second signal with said third signal and forming a second resultant signal dependent on the relationship of said second and third signals;
- a third comparator circuit for comparing said first signal with said third signal and forming a third resultant signal dependent on the relationship of said first and third signals;
- and,
- a logic circuit for receiving said resultant signals from said first. second and third comparator circuits and providing said control signal having a magnitude dependent on an instantaneous relationship of said first, second and third resultant signals.
Dependencies are inferred from the claim text.