Abstract: A device including at least a memory, a processor and an e-ink display, wherein the processor is configured and set up to read out service information from the memory, generate a machine-readable code based on the service information, and transmit the machine-readable code to the e-ink display such that the e-ink display displays the machine-readable code which, when read using a terminal, causes the terminal to retrieve the service information. A method of operating a device having an e-ink display.

Abstract: A grounding connection element for electrical grounding and/or electromagnetic shielding of electrical components arranged in a plastic housing is provided with at least one electrical contact which is guided outwardly with respect to the plastic housing. The grounding connection element is formed by a substantially a spiral-shaped metal insertion part having a contact pin protruding out of a spiral-shaped region of the insertion part and the contact pin is fixedly arranged in an outwardly accessible, substantially cylindrical recess of the plastic housing.

Abstract: A signal column includes a rod-shaped, transparent housing, inside of which a rod-shaped signal generator is arranged. At least one light distribution element is arranged in the housing between the signal generator and the transparent housing, wherein the light distribution element directs light evenly from light sources of the signal generator to the housing wall.

Abstract: A signal column includes a rod-shaped, transparent housing, inside of which a rod-shaped signal generator is arranged. At least one light distribution element is arranged in the housing between the signal generator and the transparent housing, wherein the light distribution element directs light evenly from light sources of the signal generator to the housing wall.