Abstract: A drawing support for a metal sheet drawing machine. In one implementation the drawing support is constructed of a plurality of plates positioned in series one after the other and coupled together so that at least a portion of the plurality of plates are compressed one against the other. In one implementation each of the plurality of plates has a window through which metal sheet to be drawn may pass, and a holder for holding the metal sheet when it is drawn.

Abstract: A fixed support for a metal sheet drawing machine. In one implementation the fixed support includes a window through which metal sheet to be drawn passes, and a holder which holds the metal sheet within the window as the metal sheet is drawn. The fixed support is stationary in relation to the drawing machine and includes a suspending structure that maintains a base of the fixed support a distance from any other surfaces during the sheet drawing process.

Abstract: An apparatus for drawing a metal sheet. In one implementation the apparatus includes a fixed head having a first window through which the metal sheet to be drawn may pass and a first holder for holding a first portion of the metal sheet within the first window during a drawing process. The apparatus also includes a moving head that is moveable relative to the fixed head. The moving head has a second window through which the metal sheet to be drawn may pass and a second holder for holding a second portion of the metal sheet within the second window during a drawing process. A support assembly is attached at one end to the fixed head and extends longitudinally through the second window of the moving head. The support assembly forms a part of an actuator assembly that is operable to situate the moving head in different and fixed longitudinal positions relative to the fixed head prior to a drawing process.

Abstract: An apparatus for drawing a metal sheet. In one implementation the apparatus includes a fixed head having a first window through which the metal sheet to be drawn may pass and a first holder for holding a first portion of the metal sheet within the first window during a drawing process. The apparatus also includes a moving head that is moveable relative to the fixed head, The moving head has a second window through which the metal sheet to be drawn may pass and a second holder for holding a second portion of the metal sheet within the second window during a drawing process. A support assembly is attached at one end to the fixed head and extends longitudinally through the second window of the moving head. The support assembly forms a part of an actuator assembly that is operable to situate the moving head in different and fixed longitudinal positions relative to the fixed head prior to a drawing process.

Abstract: A drawing support for a metal sheet drawing machine. In one implementation the drawing support is constructed of a plurality of plates positioned in series one after the other and coupled together so that at least a portion of the plurality of plates are compressed one against the other. In one implementation each of the plurality of plates has a window through which metal sheet to be drawn may pass, and a holder for holding the metal sheet when it is drawn.

Abstract: A fixed support for a metal sheet drawing machine. In one implementation the fixed support includes a window through which metal sheet to be drawn passes, and a holder which holds the metal sheet within the window as the metal sheet is drawn. The fixed support is stationary in relation to the drawing machine and includes a suspending structure that maintains a base of the fixed support a distance from any other surfaces during the sheet drawing process.

Abstract: Electronic device for controlling a synchronous motor with permanent-magnet rotor, comprising an alternating voltage current source at mains frequency connected in series with said synchronous motor (1), at least one static switch (2) connected in series with said synchronous motor (1), and an electronic circuit (3) that acts on said static switch (2). Said electronic circuit (3) determines the timing for the firing of the static switch (2) taking as reference the zero-crossing of the mains voltage (Vr) and applying a firing time (Td) starting from said reference, said firing time (Td) being obtained as a function of the position of the rotor (1A) of the motor (1) in the previous half-cycles.

Abstract: Electronic device for controlling a synchronous motor with permanent-magnet rotor, comprising an alternating voltage current source at mains frequency connected in series with said synchronous motor (1), at least one static switch (2) connected in series with said synchronous motor (1), and an electronic circuit (3) that acts on said static switch (2). Said electronic circuit (3) determines the timing for the firing of the static switch (2) taking as reference the zero-crossing of the mains voltage (Vr) and applying a firing time (Td) starting from said reference, said firing time (Td) being obtained as a function of the position of the rotor (1A) of the motor (1) in the previous half-cycles.

Abstract: A first object of the invention is to provide a control circuit (1) for gas burners with a fail-safe system. The circuit (1) includes a microcontroller (2) that acts on at least one valve (4), flame detector circuits (50) and tap opening detector switches (6). For each valve (4) the circuit (1) has a plurality of switches by means of which these valves are supplied with the voltage required to open them and keep them open. The microcontroller (2) governs said switches in accordance with the signals it receives from the circuits (5), from the switches (6), and from points of the actual circuit (1). The circuit (1) is safe against the failure of any of its components, including the microcontroller (2). A second object of the invention is also to provide a circuit (1) that has protection against a double failure.