Abstract: In a remote control arrangement for a medical appliance, a transmitter and a receiver are provided. The transmitter has a frequency generator controllable by means of code words which generate frequency signals and a group frequency signal alternately. In order to improve the freedom from interference and ease of changing the frequency of the group frequency signal, the frequency generator is constructed to generate a plurality of additional group frequency signals as a function of the feeding one at a time of a corresponding number of different group code words.

Abstract: In a method of remotely controlling a medical appliance frequency signal impulses and group frequency impulses are transmitted alternately from a transmitter to a receiver.In order to improve freedom from interference, the group frequency impulses are amplified in the transmitter and/or receiver by at least 3 dB less than the frequency signal impulses corresponding to command signals.For the same purpose, in a remote control arrangement for performing the method, the amplifier provided in the receiver exhibits at the group frequency a gain factor lower by at least 3 dB than at the frequencies of the frequency signal impulses.

Abstract: A loading and unloading station for conveyors with trolley driving systems which includes an automatic feeding and withdrawing device from and to a deposit place for transferring a container. The feeding and withdrawing device includes a grab movable into a shaft above the level of a container in the shaft.

Abstract: A loading and unloading station transporter for conveyors with overhead trolley drives and automatic feeder and withdrawal devices. The transporter is provided with centering means to centrally receive and hold containers for goods to be transported.