Program control and display apparatus
AssigneeMasson Scott Thrissell Engineering Limited
InventorsJohn P. Bennett, Graham R. S. Jones
Life of this patent
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Abstract
A number of values of a variable defining a program of operations are settable by means of three potentiometers, connected to a controlled apparatus, which control respectively the initial, final, and rate of change of the variable, each potentiometer having an associated plate one edge of which indicates the value set against a scale. The plate edges form a curve of a graph indicative of the program. In a modification a plurality of linear potentiometers are located at different positions along a scale showing stages in the program, the sliders of the potentiometers being used to set and also indicate the value of the variable at each stage.
Claims5
A program control and display apparatus for setting a plurality of values of a variable defining a program of operation for a controlled apparatus, comprising a display device adapted to display a graphic representation of said program, three setting devices, each comprising a variable potentiometer for a different one of three values of said variable, and for connection to the controlled apparatus so as to govern the respective value of said variable and means connected to said display device so as to produce a corresponding indication in said graphic representation, said potentiometers including a first potentiometer for setting said variable to a first predetermined value at one stage in said program, a second potentiometer for setting said variable to a second predetermined value at a further stage in said program, and a third potentiometer for setting the rate at which said variable changes from said first to said second value.
Dependencies are inferred from the claim text.