Abstract: In the case of a step bearing for an essentially horizontally arranged shaft of an open-end spinning rotor that supports itself against a freely rotatable ball, a housing is provided that contains a lubricant supply means by means of which the ball is supplied with lubricating grease.

Abstract: An ultrasonic atomizing burner for smaller heating apparatus particularly for mobile spaces, such as motor vehicles comprises an atomizer which has a fuel inlet and which is equipped with an atomizer discharge plate and a structure skirting the plate which defines a combustion air flow space for 1% at most of the combustion air amount. This structure includes a cylindrical combustion chamber having a forward discharge end with a flame baffle and with a heating gas outlet tube connected to the discharge end for the axial flow of the combustion gases. The combustion chamber has an ignition zone which is provided with wall bores for admitting primary air and it includes a spark plug in the ignition zone for igniting the combustion gases and the primary combustion air. The combustion chamber also has a burnout zone which is provided with wall slots for admitting secondary air downstream of the primary air.

Abstract: A burner for air heaters comprises a first wall structure defining an ignition chamber with an ultrasonic atomizer discharging into the ignition chamber and with means for delivering primary air into the ignition chamber for ignition by suitable ignition device to form an igniting gas mixture. The construction includes a second wall arrangement which is adjacent the ignition chamber and which defines a primary combustion chamber which has a passage for the ignited gas mixture from the ignition chamber and also for secondary air so as to complete the combustion in the main combustion chamber. The main combustion chamber in turn is connected downstream and into an exhaust diffuser in which the completely burnt gases are delivered to a place of use for heating an area such as a space in a motor vehicle.