摘要:
A device for recording measuring values on a record carrier by means of two approximately parallel, linear motors which are pivotably connected to two arms which are both connected to a single recording head. A signal generator produces signals which indicate the position of the recording head and a control device controls the motors so that the recording head is moved, without a mechanical guide, along a straight line which is perpendicular to the transport direction of the record carrier.
摘要:
The invention is directed to an apparatus for determining the proportion of substances having paramagnetic characteristics, such as oxygen, in a mixture of substances. The apparatus has a housing and the mixture of substances is passed along an arrangement of four magnetic field sources by a rotatable cuvette arrangement mounted in the housing. The apparatus is improved in that the effect of external disturbing influences on the penetration of the cuvette by the magnetic field is reduced and so that the measuring characteristics are independent of the position of the plurality of magnetic field generating units. For this purpose, the arrangement of the magnetic field sources is simply disposed at one side of the housing lying opposite to the rotating surface of the cuvette arrangement facing toward the drive shaft. The arrangement of magnetic field sources includes a carrier plate on which the magnetic field sources are accommodated and carry respective measuring field coils. The magnetic field sources face with their end faces toward the cuvette arrangement.
摘要:
A device for the determination of the concentration of substances with paramagnetic properties, particularly oxygen, in substance mixtures comprises a cell assembly divided into several chambers, which is arranged to revolve with relation to a service for producing a magnetic field penetrating the cell assembly, and a coil assembly associated with this assembly for the conversion of the magnetic induction produced in it by the paramagnetic substance into an electrical signal. The assembly of devices producing magnetic fields and their associated measuring field coils is unaffected by external interferences such as transfer of mechanical vibrations or influences of external magnetic fields. For this purpose, at least four or more, even number of devices producing magnetic fields with their respective measuring field coils are arranged on both sides of the cell assembly and symmetrically to the axis of rotation, on a common housing, and the magnetizing polarity of the devices is combined with the magnetizing polarity of their respective measuring field coils in alternating orientation.
摘要:
An apparatus for the controlled proportioning of gases to be delivered to a consumer comprises a mixed gas line containing the mixed gases to be delivered to the consumer which is connected to a plurality of separate gas supply lines. Each of the supply lines includes a quick-acting, electrically controlled valve which is controlled by control means which is effective to deliver a control pulse to open and close the valve in accordance with a set time slot pattern. For this purpose, the controller advantageously includes means for sensing the pressure in each of the supply lines and the mixed gas line and for regulating the quick-acting valves in accordance with one or more input signals which are fed to a computer section of a controller which has an actuator section which is operated in accordance with the sensed information and the input signals to carry out the supply of the gases in the set time slot pattern. The controller delivers one pulse per time slot pattern, the minimum length of the pulse being determined by the minimum switching time of the control valve and its maximum length being determined by the division of the time slot pattern. For gas amounts smaller than the corresponding minimum pulse times at each position of the time slot pattern, pulses are delivered only at certain points of the pattern.
摘要:
The invention is directed to a sensor for making capacitive measurements of the pressure in gases and contains two measuring electrodes conjointly defining a capacitor and arranged in spaced relationship to each other. This sensor is improved such that a pressure measurement is possible without deformable parts. Long-term drift free measurements can be carried out with even the smallest electrode spacing being realized so that miniature sensors can be provided. The intermediate space between the electrodes is accessible to the gas to be investigated and has electrically insulating spacers between the electrodes. The spacers determine the spacing between the electrodes and maintains the electrode spacing during the measurement.
摘要:
In volumetric dosing of liquids, equal mounts of a liquid must be added in equal time intervals to a primary flow which may consist of either liquid or gaseous substances. This is done most accurately by means of piston pumps as dosing pumps.The dosing pump according to the invention affords simple design and reliable operation. The piston stroke is fixed by means of a collar in a limiting chamber. The compensation required to prevent double fits and compensates for wear, tolerances, etc. is obtained by an elastic length equalizer in the connecting rod. This arrangement leads to being normally represented as a rigid connection which, however, in the two end positions of the piston, when the forces rise suddenly due to the collar striking the limiters, equalizes these forces over the length.
摘要:
A method and apparatus for determining the alcohol concentration in the blood of a person by testing the person's breath, including, maintaining at least a minimum flow rate for the person's breath to form a test sample of the breath, measuring the alcohol amount in the test sample, measuring the increase in humidity in the test sample over ambient humidity and finding the ratio between the alcohol amount and the increase in humidity. This ratio is proportional to the actual alcohol concentration in the person's blood and cannot be disquised by a person wishing to falsify the results of the test.
摘要:
A valve arrangement from microstructured components worked out of a basic body, for the control of fluids, include an actuation element which is movable relative to a flow path distributor and opens or closes fluid paths depending on its position. A transition from one position into the other is effected by adding an actuating drive connected to an electrical power source. The actuation element is held in its switch position. For a high fluid flow, a large force can be applied to the actuation element. The actuating drive works according to an operating principle aimed at covering the longest distance possible. A holding device is provided, which works according to an operating principle working independent of the first operating principle and provides the generation of the greatest cohesion possible.
摘要:
An apparatus is disclosed for admixing anesthetic with respiratory gas to be supplied to a patient, which comprises a mixing chamber having an inlet for receiving the liquid anesthesia and the respiratory gas, and an outlet for supplying the mixture. A feed line is provided in the inlet for the liquid anesthesia, with a heat exchanger for equalizing the inlet temperatures of the anesthesia and respiratory gas. Temperature sensors are provided in the inlet and the outlets with a circuit for determining the difference between the temperatures. Without heating of the chamber this difference is proportional to a ratio between the evaporated anesthetic and respiratory gas. With the chamber heated to equate the inlet and outlet temperatures, the amount of heating is proportional to the flow of anesthetic to the chamber.
摘要:
An apparatus is disclosed for admixing anesthetic with respiratory gas to be supplied to a patient, which comprises a mixing chamber having an inlet for receiving the liquid anesthesia and the respiratory gas, and an outlet for supplying the mixture. A feed line is provided in the inlet for the liquid anesthesia, with a heat exchanger for equalizing the inlet temperatures of the anesthesia and respiratory gas. Temperature sensors are provided in the inlet and the outlets with a circuit for determining the difference between the temperatures. Without heating of the chamber this difference is proportional to a ratio between the evaporated anesthetic and respiratory gas. With the chamber heated to equate the inlet and outlet temperatures, the amount of heating is proportional to the flow of anesthetic to the chamber.