Abstract: An apparatus and uniformly heating a plurality of hair curlers by passing a current of hot air longitudinally through the hair curler body includes a hollow case having an upper wall forming a support surface in which is formed a central air inlet opening into which the hot air discharge nozzle of a portable electric air heating device is inserted. A plurality of hot air discharge ports are radially centered around the inlet opening and each port is provided with a holding member for supporting a hair curler in the path of hot air discharged from the port. The curler body is provided with an inner element able to accumulate and conserve heat. When the curlers are mounted at the ports on the holding members, hot air blown into the case will pass into the curlers and heat them. Each curler may include a cover for receiving hot air from within the curler and deflecting the hot air to flow in the reverse direction along the outer wall of the curler.

Abstract: A twist-prevention device comprising two connecting members, respectively, for the incoming and outgoing current, mounted such that they can rotate relative to one another. The connecting members have a stepped section so as to permit easy assembly and disassembly relative to each another, and the connecting member for the incoming current is provided with annular contact strips or cable shoes which are connected to a power supply and located in stepped manner with respect to the axis of the member, whereas the connecting member for the outgoing current is provided with helically wound conductors also arranged in stepped manner on the steps of the member to separately make contact with the corresponding stepped cable shoes.