Abstract: A method for operating an ultrasonic device comprising a first and second ultrasonic transducers, includes driving the first and second transducers at a driving frequency such that the first and second transducers generate a first and a second signals, respectively. The method also includes sensing the second signal at the first transducer to produce a first measurement signal and sensing the first signal at the second transducer to produce a second measurement signal. The method further includes identifying a first set of data-points in the first measurement signal and a second set of data-points in the second measurement signal. The method also includes generating a frequency data-series using the first set of data-points and a corresponding data-point in the second set of data-points. The method also includes performing statistical operations based on the frequency data-series and configuring an operating frequency for driving the first and second transducers using the operations.

Abstract: A linear electric motors including a housing, a first armature movable on a first essentially linear path with respect to the housing, and a second armature movable on a second essentially linear path with respect to the housing, wherein the first armature is mounted to the housing by a first mounting spring, wherein the first armature and the second armature are coupled to each other by a coupling spring, and wherein the second armature is mounted to the housing by a second mounting spring.

Abstract: A linear motor is disclosed. The linear motor includes an armature mounted for driven linear oscillation substantially along a longitudinal direction; a secondary mass mounted for linear oscillation substantially along the longitudinal direction; and a coupling unit for coupling the armature and the secondary mass. The coupling unit includes at least two coupling spring assemblies and at least a coupling element, the coupling spring assemblies being arranged in planes perpendicular to the longitudinal direction and being spaced apart from each other, and the coupling element being fixedly connected with the coupling spring assemblies.

Abstract: There is provided a closed loop purity and recovery control system and process for operating a xylene purification system such as a Parex unit.

Abstract: A circuit arrangement (S) for supplying a load (P), whose essential electric property is capacitance, from a DC voltage source (U0) has a switch element (S1), which in the operational state is alternately switched between the conductive and non-conductive state, and at least one component (L1, L2) whose essential property is inductance, the load (P) being coupled into the circuit arrangement (S) in parallel to the component (L1, L2) so that the load (P) and the component (L1, L2) form a parallel resonant circuit, the switch element (S1) is connected between the parallel resonant circuit and a base voltage (GND) and the DC voltage source is to be applied in parallel (U0) to the load. The circuit arrangement (S) according to the invention can be used to drive the capacitive load (P) in a bipolar manner, the supply of the load in the non-conductive phase of the switch element (S1) being achieved by the component (L1, L2).

Abstract: The present invention relates to an electric toothbrush, specifically the toothbrush handle of an electric toothbrush, with a handle housing, with a preferably rod-shaped drive transmitter which protrudes from a first side of the handle housing and on which a brush attachment can be secured, and with a drive motor for moving the drive transmitter, wherein the drive transmitter is mounted, by means of a bearing device in the interior of the handle housing, in the manner of a rocker arm such that the drive transmitter can be pivoted to-and-fro transverse to its longitudinal axis by the drive motor. The invention further relates to the whole toothbrush, comprising such a toothbrush handle part and a brush attachment secured to the drive transmitter thereof. According to the invention, the bearing device holds the drive transmitter so as to pivot about a rotation point lying outside the handle housing.

Abstract: A web offset press includes several printing units through which a web passes essentially in a horizontal direction. The printed web then passes to at least one first folding unit. Each of the printing units has at least one plate cylinder and one transfer cylinder which interacts with the web being printed. An effective plate width of the plate cylinder corresponds to the print image of at least eight upright or prone printed pages in a BIN 4A format. The printed web is slit longitudinally into a plurality of web strands: A first number of these web strands are supplied to the first folding apparatus. At the same time, a second number of web strands, produced by the slitting of the same web, are supplied to a second folding apparatus for further processing.

Abstract: A printing unit is comprised of at least two cylinders which cooperate with each other in a printing group. At least one of these at least two cylinders is movably mounted so that it can be positioned against the other of the at least two cylinders by the use of at least one actuator, which is preferably configured as a power-controlled actuator. A control device is provided and in which several different preset values, which represent different levels of contact force between the two cylinders, are stored. Such data storage is in accordance with a criterion which concerns machine data and/or consumed material data and/or operational data. This data is usable to position the cylinder by operation of the actuator.

Abstract: A form cylinder of a printing machine includes a plurality of sections in series in an axial direction of the cylinder surface. At least one printing form is arranged in each one of these sections. The form cylinder has at least one channel, also extending in the axial direction of the cylinder. That channel has an opening on the surface of the form cylinder. At least one holding device for each of the sections is arranged in this channel. Each such holding device can be pneumatically actuated in sections. At least one recess, open to the cylinder surface, is formed outside of these sections. A device that is usable to distribute compressed air to the respective sections of the form cylinder is provided in this at least one recess. The device for distributing the compressed air is configured as a plurality of valves. At least one control device is provided outside of the form cylinder and is used to activate the plurality of valves in a non-contact manner.

Abstract: There is provided a closed loop purity and recovery control system and process for operating a xylene purification system such as a Parex unit.

Abstract: Fluid leaks are identified and located by successively monitoring changes in fluid flow and sound velocities of fluid at a plurality of locations in the pipe with flow meters, such as with ultrasonic flow meters. Preferably the successive monitoring sampling rates are sufficiently high to measure instantaneous velocity changes. A controller coupled to the meters associates changes in monitored fluid flow and sound velocities in two locations along the pipe with a leak event occurring between those locations. The controller identifies the association event at each location and correlates pipe leak location based at least in part on difference in time between the respective location events. The system and method may be used in liquid and gas pipeline transmission systems.

Abstract: A linear electric motors including a housing, a first armature movable on a first essentially linear path with respect to the housing, and a second armature movable on a second essentially linear path with respect to the housing, wherein the first armature is mounted to the housing by a first mounting spring, wherein the first armature and the second armature are coupled to each other by a coupling spring, and wherein the second armature is mounted to the housing by a second mounting spring.

Abstract: A printing group of a printing press is comprised of a transfer cylinder, a forme cylinder and a first roller of an inking unit. That first inking unit roller cooperates, as an ink application roller, with the forme cylinder. The inking unit is provided with two axially traversing friction cylinders which are serially disposed in the ink path to the forme cylinder. The first inking unit roller has substantially the same diameter as the forme cylinder.

Abstract: A gas control and operation method of a fuel cell system for improved water and gas distribution is disclosed. The present invention provides for a mechanization of a fuel cell system that allows control of the anode reactant and anode effluent through the anode portions of the fuel cell system to improve water and gas distribution on the anode side of the fuel cells that increases the voltage stability of the fuel cells.

Abstract: A web offset press includes several printing units through which a web passes essentially in a horizontal direction. The printed web then passes to at least one first folding unit. Each of the printing units has at least one plate cylinder and one transfer cylinder which interacts with the web being printed. An effective plate width of the plate cylinder corresponds to the print image of at least eight upright or prone printed pages in a BIN 4A format. The printed web is slit longitudinally into a plurality of web strands: A first number of these web strands are supplied to the first folding apparatus. At the same time, a second number of web strands, produced by the slitting of the same web, are supplied to a second folding apparatus for further processing.

Abstract: The invention relates to a small electrical appliance for removing hairs, with a handpiece extending in the direction of a center axis and provided with front and rear sides and side faces, and with an operating head which is secured on the handpiece via a retaining device and has an operating unit. The operating unit is composed of at least one operating element which is set in motion via a drive member by an electrical drive motor formed in the small appliance, such that, when the operating unit slides along the skin surface of a user, hairs are removed by the operating unit. The retaining device is connected to the handpiece via guide means in such a way that, when a force (F1 or F2) acts on the operating head in the guiding direction, at least a lateral movement (c or d) of the operating head relative to the handpiece takes place.

Abstract: There is described a method and device for measurement of the specific density of a gaseous or liquid medium, whereby a pulsed acoustic signal is injected into the measured medium by means of a transmitting transducer, the signal is detected by a receiver transducer, after passing over a measured path, whereupon the acoustic impedance Z is automatically determined in an analytical device by comparison of a curve for the currently measured received signal with reference curves, predetermined for various values of the acoustic impedances stored for each value of the acoustic impedance, whereby the propagation speed c of the acoustic signal in the medium is determined and the density p of the medium is calculated as the quotient from the acoustic impedance Z and the propagation speed c. The method is preferably of application to an ultrasound mass flow measurement device and hence has the advantage that no additional density sensor is required, nevertheless permitting a robust and precise measurement of density.

Abstract: A plurality of printing blocks are placed on a plate cylinder of a printing machine. Each of these printing blocks is located at one of a plurality of mounting locations which are located adjacent each other in an axial direction of the plate cylinder. Each of these printing blocks is stored in a storage device which includes storage positions that are located adjacent to, and offset from each other at a fixed distance in the axial direction of the plate cylinder, prior to the arrangement of the printing blocks at one of the mounting locations of the plate cylinder. The plate cylinder and/or the storage device are displaced axially relative to each other by the operation of a positioning device.

Abstract: A circuit arrangement (S) for supplying a load (P), whose essential electric property is capacitance, from a DC voltage source (U0) has a switch element (S1), which in the operational state is alternately switched between the conductive and non-conductive state, and at least one component (L1, L2) whose essential property is inductance, the load (P) being coupled into the circuit arrangement (S) in parallel to the component (L1, L2) so that the load (P) and the component (L1, L2) form a parallel resonant circuit, the switch element (S1) is connected between the parallel resonant circuit and a base voltage (GND) and the DC voltage source is to be applied in parallel (U0) to the load. The circuit arrangement (S) according to the invention can be used to drive the capacitive load (P) in a bipolar manner, the supply of the load in the non-conductive phase of the switch element (S1) being achieved by the component (L1, L2).

Abstract: At least two blankets which are removed from the same cylinder of a printing machine one after the other, are stored in a storage device. The blankets are drawn off the cylinder in a longitudinal direction and are stored in the device at an angle of inclination of not more than 15° relative to the horizontal. The second blanket to be drawn off is stored below the previously drawn-off blanket at a distance that is vertical along its length.