Abstract: A method for operating a radio remote control system having a transmitting unit and a receiving unit, composed of: following the termination of a radio connection between the transmitting unit and the receiving unit, modifying at least one transmitting or receiving parameter of the transmitting unit or the receiving unit with respect to a standard value in such a way that the establishment of a new radio connection is only possible if the distance between the transmitting unit and the receiving unit does not exceed a predetermined value; and following the establishment of a new radio contact with the modified parameter in effect, resetting the respective parameter to the standard value.

Abstract: An injection molded element in combination with at least one electrical contact element embedded in the injection molded element. The injection molded element forms a wall element of an electric or electronic device.

Abstract: A control element for a device, specifically a push-button or switch, is provided on at least part of its visible surface with a luminescent substance, which is admixed to the synthetic material of the control element. The luminescent substance provides, over a certain period of time, a luminous density with decreasing intensity, which compared to areas in the vicinity and/or applied symbols, produces an at least sufficiently visible contrast in order to make the control element stand out recognizably.

Abstract: A marking element for marking the function of a control element of an electric or electronic device with numbers or pictorial symbols. The marking element is composed of a first section composed of a first film having a luminescent layer to be applied to a control area of the control element, and a number or pictorial symbol is provided on the first section.

Abstract: An injection molded element in combination with at least one electrical contact element embedded in the injection molded element. The injection molded element forms a wall element of an electric or electronic device.

Abstract: A method for operating a radio remote control system having a transmitting unit and a receiving unit, composed of: following the termination of a radio connection between the transmitting unit and the receiving unit, modifying at least one transmitting or receiving parameter of the transmitting unit or the receiving unit with respect to a standard value in such a way that the establishment of a new radio connection is only possible if the distance between the transmitting unit and the receiving unit does not exceed a predetermined value; and following the establishment of a new radio contact with the modified parameter in effect, resetting the respective parameter to the standard value.

Abstract: A remote control system, particularly for remotely controlling industrial equipment, has a sensor that detects the operator's safety-relevant medical data and transmits them as a control signal to a control circuit in a transmitter or receiver. The control circuit triggers a predefinable control sequence when the value of the control signal exceeds or falls below at least one predefinable value. A malfunction, especially of the “human component” of the total system, can be reliably detected as soon as it becomes safety relevant, i.e., as soon as there is a danger that the operator might no longer be able to control the industrial equipment properly and reliably with the remote control system.