摘要:
A low-pass filter, including: between a first terminal and a second terminal, a series association of a first resistor, of a second resistor, and of a first amplifier; in parallel with the second resistor, a series association of a second amplifier and of a first capacitor; a second capacitor between an input of the first amplifier and a third terminal of application of a reference voltage; and a third capacitor between the second terminal and the third terminal.
摘要:
A low-pass filter includes an integrator having an adjustable unity frequency. The integrator includes a first input, first output and feedback loop between the first input and output of the integrator. The first input is connected to a branch that includes a first impedance, to which is applied a first input voltage of the low-pass filter. The feedback loop includes a second impedance and the first output of the integrator is the first output of the low-pass filter.
摘要:
A low-pass filter includes an integrator having an adjustable unity frequency. The integrator includes a first input, first output and feedback loop between the first input and output of the integrator. The first input is connected to a branch that includes a first impedance, to which is applied a first input voltage of the low-pass filter. The feedback loop includes a second impedance and the first output of the integrator is the first output of the low-pass filter.
摘要:
The present invention concerns a boiler for use in a machine for making hot beverages comprising a heat diffuser (32) with a first wall (33) destined to be placed in contact with the liquid to be heated and a second wall (34) opposite first wall (33), heating means (30) consisting of at least one serigraphed or photo-engraved resistance (31) arranged on second wall (34) of heat diffuser (32) and defining a pattern formed of at least one resistive track, a body which with first wall (33) of heat diffuser (32) defines a heating chamber (11) inside which the liquid is to be heated. It also includes a bearing means shaped to bear on second wall (34) of heat diffuser (32) on at least one zone, the resistive track(s) being arranged on either side of the said zone so that the bearing means receives at least part of the force transmitted by the liquid to heat diffuser (32) and resulting from the pressurizing of the liquid in the heating chamber (11).
摘要:
The present device concerns a boiler for use in a machine for making hot beverages including a diffuser (32) with a first wall (33) destined to be placed in contact with the liquid to be heated and a second wall (34) opposite first wall (33), heating element (11) consisting of at least one thick film or photo-etching resistor (31) arranged on second wall (34) of diffuser (32), a body which, with first wall (33) of diffuser (32), defines a heating volume (11) inside which the liquid is to be heated, characterised in that it is arranged so that heating volume (11) is positioned on either side of heating element (30). Also described is the fabrication of machines for preparing hot beverages such as coffee.
摘要:
A device and process for brewing drinks, the device includes a brewing chamber capable of accommodating a package containing products to be brewed, the chamber having two parts configured so as to be moved towards or away from each other to close or open, respectively, the brewing chamber, and package arresting elements capable of applying themselves around the perimeter of the package once introduced into the brewing chamber. According to the invention, the device is such that one of the parts of the brewing chamber is mobile, allowing it to move the package past the arresting elements by deforming the perimeter of the package. Applicable to espresso type coffee machines.
摘要:
A device for production of a beverage by infusion of a ground substance for infusion includes an infusion chamber (2), for housing the ground product, a hot water circuit through the infusion chamber (2) and elements for circulating the hot water in the circuit. The device includes elements for reversing the flow of the hot water circuit through the infusion chamber (2).
摘要:
A device for the production of beverages such as coffee by infusion of a product contained in a tablet includes an infusion chamber adapted to receive such a tablet (2) and has two portions (3, 4) arranged to move toward or away from each other to close or open the infusion chamber. Only one of the portions has mobility in rotation adapted to place the tablet (2) in abutment in the portion, the portion (3) movable in rotation having mobility in translation to open or close the infusion chamber, and having common drive elements for the mobility in translation and the mobility in rotation of the movable portion (3). The drive elements having a rotatable drive shaft (13) coupled to the movable portion (3) by at least one rod (14a, 14b) mounted pivotably between the drive shaft (13) and the movable portion (3).
摘要:
A sensing and regulating apparatus for use with a tool such as a welding torch guided along a bevel, an oxygen cutting head, a chisel, a milling cutter, or a nibbling machine, comprises an optical apparatus projecting a light ray on a reference line where it delineates a spot which is diffused particularly toward a receiver consisting of elements sensitive to light. The spot of light falling on the receiver supplies two adjustment signals according to its position and its width. These signals are used to control elements carrying the optical apparatus so that the apparatus continually follows the reference line and so that it always remains at the same distance from the reference line. The movements of the optical apparatus control the associated working tool so that its path is equal, or homothetic, to that of the optical apparatus as a result of the reference line.
摘要:
To reduce the size of the beam spot of a laser beam, a four-element lens having the characteristics set forth in the table forming part of the specification, is used, thereby providing a large-aperture objective with a field being about 2.degree., coma corrected and with low image field convexity.