# US 4,395,667 A · Non-linear control arrangement for printing machines

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- Number: US 4,395,667 A
- Document ID: US4395667A
- Status: Granted
- Kind: A
- Application number: 06/283,019
- Filed: 1981-07-08
- Granted: 1983-07-26
- Earliest claimed: 1980-07-25
- Assignees: Veb Kombinat Polygraph "Werner Lamberz" Leipzig
- Inventors: Klaus Tonn
- Web page: https://patentgrep.com/patent/US4395667A

## CPC

- B41F 7/24: Damping devices
- B41F 33/0054: {Devices for controlling dampening}
- B41F: PRINTING MACHINES OR PRESSES (manifolding devices or office printing machines B41L)

## Abstract

A non-linearly operating control arrangement for driving units, such as those of damping devices of printing machines, includes a plurality of parallel resistance-diode bridges having two inputs and two outputs, a pair of resistors interposed between one of the inputs and the respective outputs, and a potentiometer interposed between the outputs and having a wiper connected to the other input via a diode. The first outputs of all bridges are connected to the input of a summation member and the output of the latter, together with the second outputs of all bridges, is connected to the input of an amplifier whose output voltage controls the driving unit speed of rotation. Comparison potentials of different magnitudes are supplied to the second inputs of the bridges from a series of additional potentiometers respectively associated with the bridges. Another potentiometer is provided which supplies additional potential to the input of the amplifier. The potentiometers are arranged in a clear correlation with one another on a setting panel.

## Claims

### Claim 1

A non-linear control arrangement for a driving unit, particularly for use in printing machinery, comprising a source of a basic electrical signal; means for producing a control signal non-linearly dependent on said basic signal, including a plurality of adjustable resistor-diode bridges coupled in parallel to one another and each having a first and a second input and a first and a second output, a pair of resistors respectively coupled between said first input and said first and second outputs, an adjustable potentiometer coupled between said outputs and having a wiper connected to said second input, and a diode interposed between said wiper and said second input, said first inputs being connected in parallel from said basic signal source, said producing means further including a source of a plurality of electrical potentials, including a plurality of additional adjustable potentiometers respectively associated with said bridges and connected to said second inputs thereof, a summation member having an input and an output, and an amplifier having an input and an output, said first outputs of said bridges being connected to said input of said summation member and said second outputs of said bridges and said output of said summation member being connected to said input of said amplifier; and means connected from said output of said amplifier for controlling the speed of rotation of the driving unit.

### Claim 2 (depends on 1)

The arrangement as defined in claim 1; and further comprising an adjustable source of an additional electrical potential connected to said input of said amplifier.

### Claim 3 (depends on 1)

The arrangement as defined in claim 1, wherein said summation member includes an operational amplifier; and further comprising a plurality of additional resistors each interposed between one of said first outputs and said input of said operational amplifier.

### Claim 4 (depends on 1)

The arrangement as defined in claim 1, wherein said amplifier is an operational amplifier; and further comprising a plurality of auxiliary resistors each interposed between one of said second outputs and said input of said operational amplifier, and means for controlling the potential, including an auxiliary potentiometer connected to said input of said operational amplifier.

### Claim 5 (depends on 1)

The arrangement as defined in claim 1; and further comprising means for supporting said producing means, including a setting panel supporting said potentiometers.

### Claim 6 (depends on 5)

The arrangement as defined in claim 5, wherein said adjustable potentiometers of said bridges are constructed as sliding control potentiometers; and wherein said additional adjustable potentiometers are arranged on said setting panel in a recognizable correlation with the respectively associated ones of said sliding control potentiometers.