Abstract:
A method for controlling the power of a load (1) powered from a source of AC voltage U having a period T using a phase control system, wherein, for a predetermined set power, a sequence of an integer p of elements, where p is greater than 1, is periodically delivered to said load (1), each element, numbered i, of the sequence being characterised by an integer ni with a half-period T/2 during which the AC voltage U is switched according to a series of different phase angles alpha i from alpha 1 to alpha n corresponding to respective durations ti from t1 to tn during which the load (1) is cut off from the power supply. The phase angles alpha i of element i and alpha i+1 of element i+1 have similar repetitive values so that the mean current is zero over a complete cycle.
Abstract:
The vacuum cleaner includes a housing (2) having a dust compartment (11) containing a dust bag (17) and a vacuum compartment (12) containing a motor-ventilator set (20); a vacuum hose (3, 5) coupled to a suction unit (7) with a suction aperture; and a device (30) for automatically controlling the power of said motor-ventilator set (20), comprising means (50) for sensing the type of flooring and fuzzy logic control means (46). The automatic control device (30) of the invention further includes means (60) for detecting the dynamic movement of said suction unit (7), wherein the fuzzy logic control means (46) is adapted to apply a fuzzy inference operation to the output of said floor-type sensing means (50) and to the output of the suction unit dynamic movement sensing means (60), so as to control said motor-ventilator set (20) on the basis of said fuzzy inference operation.
Abstract:
The invention concerns an electric cooking oven comprising a cooking vessel (1), a microwave energy source and a waveguide (2') substantially parallelepiped in shape delimited transversally by two substantially rectangular surfaces (20', 21') located in two parallel planes separated by a predefined distance (d), the output of guided waves occurring in at least two zones (230, 231) located in an outlet plane (23') perpendicular to the two surfaces and delimited by two parallel edges (b'1, b'4) connecting the two surfaces. The length (1) of said edges is greater than the distance (d) separating the two surfaces (20', 21') so as to optimise the number of excited transversal electric and/or transversal magnetic modes inside the cooking vessel in excitation planes parallel to the outlet plane.
Abstract:
A toaster comprising a housing (1) containing a toasting chamber (2) in which a toast rack (4) is movable between at least one eject position and a toasting position where it is held by an electromagnetic actuator device (5) comprising a control coil (6) with a hollow holder (7) secured to a plate (20) supporting electrical connection members (22) and surrounding a magnetic core (8), as well as a movable armature (9) for holding the toast rack (4) in the toasting position. The magnetic core (8) is mechanically separate from the holder (7) of the coil (6) and the plate (20), and secured to a component (24) of the housing (1).
Abstract:
An apparatus comprising a drive motor (8), two coupling devices (20, 28) linked to the motor and engageable by a whisk and a mixing arm (38) respectively, an electrical switch (71) operated by means of a button (67) having an "off" position, a number of "continuous on" positions and a "selective on" position, a vertically movable ejector (51), and a mechanical assembly (72) for preventing continuous operation when the mixing arm is in place. Said mechanical assembly comprises a movable member (74) which releases the ejector when the whisk is in place, said ejector having an engagement tab (53) enabling operation of the button when said ejector is in the raised position, and locks the ejector (51) in the lowered position when the mixing arm is in place. The engagement tab (53) of the ejector locked in the lowered position locks the button (67) on the side corresponding to its "continuous on" positions.
Abstract:
An electric toaster with a housing (1) comprising a toasting chamber and a slot (2) provided in the top surface thereof for inserting slices of bread, at least one heating element (3), and at least one bread holder (4) movable up and down on a guide device (6) by means of a lowering and raising mechanism (8) between the housing (1) and the toasting chamber. Said guide device (6) comprises a single vertical slide rail (9) with a slide (10) movably mounted thereon, and said holder (4) is attached only to the slide (10) so that it is cantilevered to said post (9).
Abstract:
Household coffee machine comprising, in a housing (2), a cold water reservoir (4), a water-heater (6) which is supplied by said reservoir and which supplies, through a hot water tube (8), a watering spout (10) having a cover (11), a base (12) having a central hole (14) and a series of peripheral holes (16) intended to the watering according to two modes of watering the coffee powder (18) contained in a filter (20) placed in an operation position, said spout (10) also comprising a bearing (22) wherein is vertically mounted a movable obturation means (24) whose displacement is controlled by a bimetallic strip (26). According to the invention, the watering spout (10) has on its base (12) at least one intermediary zone (28) which is arranged between the central hole (14) and the series of peripheral holes (16) and wherein is arranged a series of intermediary holes (30) which are also intended to water the coffee powder (18) and which are susceptible of being closed during the obturation period by a closure means (32) integral with the obturation means (24), the latter being associated with a movable stop means (34) intended to control the stroke of said obturation means (24) in the bearing (22) so that the closure means (32) occupies at least one intermediary position between the obturation position and the opening position, and wherein the hot water flows through the series of intermediary holes (30) while the central hole (14) is kept closed.
Abstract:
Brewing apparatus including a cold water container (1) which incorporates a water purifying device (5) and comprises a water outlet (2) connected to the water-heater (3). According to the invention, the water purifying device includes a removable cartridge (7) comprising a lower part forming a receptacle (8) sealingly mounted in an appropriate reservoir (10) formed in the container bottom, and wherein is removably lodged a filter bag (15) containing a water purifying substance (16), and an upper part forming a top (18) located in the extension of the receptacle (8) and adapted to close the latter. The cartridge top (18) comprises at least one opening (42) through which water enters from the container, said cartridge receptacle (8) comprising at last one opening (51) through which water flows into the water-heater (3) after passing through the filter bag (15). Application especially to electric coffee makers.
Abstract:
This household appliance comprises a bowl (2) housing a knife and locked with a removable lid (18); a removable motor unit (31) the output shaft of which rotates the knife (10); a switch (47) arranged in the supply circuit of the motor and actuated by a manual control member (49); and a safety device authorising the closure of the switch (47) only when the lid is properly locked on the bowl. The invention is characterised in that the safety device comprises a first part (61) mounted integrally in the lid (18) movable between a retracted inoperative position and a projecting operative position, and a second part (63) movable in the motor unit (31) between a safety position in which it blocks the switch (47) in an open state when the first part (61) is in inoperative position and a retracted state for which it is actuated by the first part (61) in operative position so as to release the switch (47).
Abstract:
A method for powering an electronically switched variable-reluctance polyphase electric motor from a rectified voltage source, including, for each phase, magnetising sequences (M1-3) during which the rectified voltage is applied to said phase, and demagnetising sequences (DM1-3) during which the inverse of the rectified voltage is applied to said phase. The method further comprises sensing disturbance in the current from the rectified voltage source, and, in response thereto, free-wheel sequences (RL1-3) during which the magnetic energy currently stored in at least one of the phases is substantially maintained therein. The method is useful for powering domestic appliances.