Control system

Claim 2

A control system for an appliance control that includes a microprocessor (Ul) the control system being characterised in that it includes multiplexed display means (DSl) electrically connected to and controlled by said microprocessor (Ul), rotary-entry logic encoding means (10) electrically connected to said microprocessor (Ul) for incrementing and decrementing first desired data into said microprocessor, and additional means (30) electrically connected to said microprocessor (Ul) for entering additional data into said microprocessor.

Claim 3

Apparatus according to claim 1 characterised in that said rotary-entry logic encoding means (10) includes manually rotatable switch means (SWl).

Claim 4

Apparatus according to claim 2 characterised in that said rotary switch means (SWl) and said additional means (30) each require the application of manual force to effect actuation thereof.

Claim 5

Apparatus according to any preceding claim characterised in that said display means (DS1) includes indicia means (Bl-BlO), preferably in the form of a segmented bar graph, for indicating the additional data entered into said microprocessor (Ull.

Claim 6

Apparatus according to any preceding claim wherein said microprocessor (Ul) includes a pair of input terminals (ROO,ROl) and a plurality of output terminals (B20-B23, B30); the control system being characterised in that said display menas (DS1) is connected to said output terminals and is controlled by signals generated at said output terminals as a function of the signals received at said input terminals, and in that said control system includes means for independently connecting said input terminals (ROO,ROl) to a source (24) of D.C. potential, and the rotary switch means (SW1) includes a rotary disc (14) provided with first and second concentric and electrically interconnected, offset tracks (SWA, SWB) comprising electrically conducting segments separated by electrically nonconducting segments providing offset code patterns a third concentric, continuously electrically conducting track (SWC) connected to said first and second tracks (SWA, SWB) and to ground, and means controlled by said tracks and effective to connect said input terminals to ground whereby desired input signals in the form of digital code may be selectively incremented and decremented to said microprocessor.

Claim 7

Apparatus according to claim 5 characterised in that it includes resistance-capacitance filter networks (C9, R15; C10, R17) connected to each of said input terminals (ROO, R01) intermediate said source (24) of potential and said rotary switch means (SW1).

Claim 8

Apparatus according to claims 5 or 6 characterised in that it includes pull down resistance means (R16, R18) connected to each of said input terminals (ROO, R01) intermediate said source (24) of D.C. potential and said rotary switch means (SWl).

Claim 9

Apparatus according to any preceding claim characterised in that it includes means for varying the magnitude of the data incremented and decremented into said display means (DSl) in proportion to the magnitude of the data currently displayed and stored in said microprocessor (Ul).

Claim 10

Apparatus according to any preceding claim characterised in that said additional means (30) includes a potentiometer, preferably, a rotary potentiometer.

Claim 11

Apparatus according to claim 9 characterised in that said additional means (30) also including a comparator (U2) having positive and negative inputs and an output, said potentiometer being connected to said positive inout of said comparator (U2), CMOS inverter means (U3) connected to said output terminals of said microprocessor, and an R/2R ladder network (32) connected to said CMOS inverter means (U3), the resulting D to A converter means being connected to said negative input of said comparator (U2).

Claim 12

A control system for an appliance control that includes a microprocessor having an input terminal and a plurality of output terminals, the control system being characterised in that it includes multiplexed display means (DSl) electrically connected to and controlled by said microprocessor, said display means (DSl) including indicia means (B1-B10) in the form of a segmented bar graph indicating data entered into said microprocessor (U2), and being connected to the output terminals and controlled by signals generated at said output terminals and in that it comprises a power level circuit including a manually actuable rotary potentiometer (30) having a variable resistance means (R63), a comparator (U2) having positive and negative inputs and an output, D to A converter means comprising a CMOS inverter (U3) and an R/2R ladder network (32) connected to said CMOS inverter (U3) and to said negative input of said comparator (U2) said CMOS inverter being connected to said output terminals of said microprocessor (Ul) said variable resistance means (R63) being connected to said positive input of said comparator (U2), the output of said comparator being connected to the input terminal of the microprocessor (Ul), and a source (22) of D.C. potential connected to said variable resistance means (R63).

Claim 13

A control system for an appliance control that includes a microprocessor having an input terminal and a plurality of output terminals, the control system being characterised in that it includes multiplexed display means (DSl) electrically connected to and controlled by said microprocessor, said display means (DSl) including indicia means (B1-B10) in the form of a segmented bar graph indicating data entered into said microprocessor (U2), and being connected to the output terminals and controlled by signals generated at said output terminals and in that it comprises a power level circuit including a manually actuable rotary potentiometer (30) having a variable resistance means (R63), a comparator (U2) having positive and negative inputs and an output, D to A converter means comprising a CMOS inverter (U3) and an R/2R ladder network (32) connected to said CMOS inverter (U3) and to said negative input of said comparator (U2) said CMOS inverter being connected to said output terminals of said microprocessor (Ul) said variable resistance means (R63) being connected to said positive input of said comparator (U2), the output of said comparator being connected to the input terminal of the microprocessor (Ul), and a source (22) of D.C. potential connected to said variable resistance means (R63).

Claim 14

Apparatus according to claim 11 characterised in that it includes filter means (R35, C18) interposed between said variable resistance means (R63) and said positive input of said comparator (U2).

Claim 15

Apparatus according to claims 11 or 12 characterised in that it includes diode means (D16-D20) disposed between said output terminals (R20-R23, R30) of said microprocessor (Ul) and said D to A converter means.

Claim 16

Apparatus according to any of claims 11 to 13 characterised in that it includes capacitance means (C21) connected across said source (22) of D.C. potential and ground.

Claim 17

Apparatus according to claim 13 characterised in that it includes pull down resistance means (R48-R52) connected between said diode means (D16-D20) and said source (22) of D.C. potential.