Abstract: A cooking appliance, an induction cooking hob (400) and a method (1000) of determining a characteristic of the cooking appliance. The cooking appliance (100) has vessel (102) containing a chamber (104). There are magnets (106) mounted to the vessel (102), the magnets (106) provide a code that identifies a characteristic of the cooking appliance (100). There is an appliance positioning interlock (110) for operatively coupling with an appliance positioning interlock engagement member (406) of the cooking hob (400) to thereby position the cooking appliance (100) on the cooking hob (400) In a predefined location. The cooking hob (400) has sensors (414) so that when the appliance (100) is at the predefined location the sensors (414) can detect and decode the magnetic field code to identify the characteristic This characteristic is used to define a cooking profile to heat of the appliance to a desired temperature and optionally the appliance is heated for a predefined time.

Abstract: An attachment for a vacuum cleaner includes a suction head which includes a suction chamber to create and contain a region of low pressure adjacent to a surface to be cleaned. The suction head includes a number of air bleeds and these may be arranged as a first array first air bleeds and a second row of second air bleeds. Each air bleed is arranged to induce cyclonic airflow as the atmospheric airflows into the suction chamber. This cyclonic airflow is directed towards the surface to be cleaned and, in particular, an apex of this cyclonic airflow is arranged to coincide or penetrate the surface to be cleaned. For example, the apex of the cyclonic airflow may locate within the carpet fibers of a carpet in order to disturb and disrupt dust and debris within the carpet. Accordingly, the cyclonic air bleeds agitate the surface to be cleaned whilst also performing the function of a conventional air bleed within a suction head of a vacuum cleaner.