Abstract: A laser spectrometer suitable for detecting gas components in a test sample in the ultraviolet range. The measuring laser radiation (2) is sent to a nonlinear crystal (20, 40, 41), which increases the nominal laser frequency to the frequency that corresponds to the absorption wavelength of the measured gas. Tripling of the frequency takes place either after passage of the radiation through a single nonlinear crystal (20), or by mixing a frequency-doubled laser beam with the measuring laser radiation (2) in a common, second nonlinear crystal (41).

Abstract: A gas ratio control device for anesthetic apparatus with an anesthetic gas feed line 1, which has a control valve 12 and a first measuring resistance 6, and an oxygen feed line 2 with a second measuring resistance 10, wherein the differential pressure determined from the measuring resistances is sent to a proportional member 13 for regulating oxygen feed to anesthetic gas feed. So oxygen concentration will not drop below a minimum oxygen concentration value in the case of anesthetics to be metered at both low and high doses, one of the measuring resistances 6, 10 can be replaced or bridged over with a bypass line 14, which contains a throttle point 15 (FIG. 1).

Abstract: A filling device for anesthetic vaporizers, with a connection piece which can be connected to a connection opening of an anesthetic reservoir in a gas-tight and liquid-tight manner. Leakage of anesthetic gas or liquid anesthetic can be avoided during the filling especially of low-boiling anesthetics by providing the reservoir 10 with a seal 17, which closes the connection opening 9 at least in a liquid-tight manner and can be opened by a projection 5 which is arranged on the connection piece 2 and extends into the interior space of the connection opening 9, as soon as the connection piece 2 is sealed off from the surroundings against the connection opening 9 by a sealing element 15 in a gas-tight and liquid-tight manner.

Abstract: A process for calibrating a flow sensor in a respiratory system, with final control elements arranged in the respiratory system for influencing the respiration gas stream, is to be improved in terms of the influence of the qualitative gas composition of the respiration gas. To accomplish the task, the final control elements 4, 11 are switched, for calibration, over to a closed respiratory system with directed respiration gas stream. The drive unit 13 feeds the respiration gas present in the respiratory system through the flow sensor 9 according to a predetermined time-volume relationship. A calibration value for the flow sensor 9 is formed by comparison of the time-volume relationship with the measured signal of the flow sensor 9.

Abstract: A metering device for a liquid anesthetic that is fed from a reservoir via a supply line into a heatable intermediate container maintained under pressure, from which gaseous anesthetic is fed via a metering valve into a fresh gas line. Accurate metering, which can be better monitored, is provided for low-boiling anesthetics. A supply unit 7 is mounted in the supply line 5, and liquid anesthetic is transported by the supply unit 7 into the intermediate container 6 until it is filled up to a predetermined filling level. A heating device 12 stabilizes the temperature of the liquid bath and ensures a sufficiently high vapor pressure of the gaseous anesthetic above the liquid phase. The anesthetic vapor is sent via the metering valve into the fresh gas line.

Abstract: A metering pump for metering low-boiling liquids, especially liquid anesthetics provides continuous metering of liquid. To achieve this, the pump chamber 7 is maintained at a temperature below the boiling point of the liquid by means of a cooling device 14, preferably a Peltier cell.

Abstract: An anesthetic metering device is provided with a temperature-stabilized anesthetic vapor source, from which anesthetic vapor 14 is metered into a carrier gas stream via a delivery line 8 with a metering valve 11 that can be controlled by a control unit 6. The arrangement is provided so that uncontrolled evaporation of anesthetic is prevented. To accomplish this task, the anesthetic vapor source is designed as a vaporizer chamber 2 filled with liquid anesthetic 3, and a gas delivery element 9 generating the metering pressure P.sub.I is present in front of the metering valve 11.

Abstract: The invention is directed to a method of operating a laser diode in a measuring system for spectroscopically measuring the concentration of a gaseous component in a gas sample. This method is improved in that the mode jumps of the laser diode are easily recognized when adjusting the temperature-current operating point of the laser diode. An optical filter is placed in the beam path for adjusting the temperature-current operating point of the laser diode and, by changing the temperature T and the operating current I of the laser diode while simultaneously receiving the output signal supplied by an evaluation unit, the spectral positions of the mode jumps of the laser diode are determined which are included in the absorption lines of the gas sample. Thereafter, the temperature-current operating point is adjusted so that the distance of this operating point to the positions of the mode jumps is not less than a fixed spacing.

Abstract: An anesthetic metering device with a bypass stream 5 passed from a gas inlet opening 2 via a bypass valve 3 to a gas discharge opening 4 and with a vaporizer chamber stream 7 flowing from a vaporizer chamber 6 via an adjusting device. Accurate metering is possible even in the case of anesthetics with low boiling points by manufacturing the vaporizer chamber 6 at least at the saturation vapor pressure of the anesthetic 22. The adjusting device includes a differential pressure transducer 9 connected on both sides of the bypass valve 3 and a metering valve 10, wherein the metering valve 10 is actuated by the output quantity 11 of the differential pressure transducer 9 via a proportional member 12 so that the concentration is adjusted via the variable transmission ratio of the proportional member 12.

Abstract: The invention is directed to a transport incubator for accommodating prematures and newborns in a compartment wherein the temperature is controlled by means of an energy store which is in thermal contact with the compartment. The transport incubator is improved in that the energy store is made as small and as light as possible and does not have to be supplied with energy continuously in the operating condition. In addition, the transport incubator can be produced at low cost while utilizing environmentally friendly materials. The energy store is configured as an adsorption vessel containing an adsorption material. For generating the heat to be supplied to the infant compartment, the adsorption vessel can be connected to a supply vessel which contains a fluid which is adsorbing on the adsorbing vessel while giving off adsorption heat.

Abstract: A locking device 5 for a metering device 3 of an anesthetic vaporizer 1 with an unlocking device 6 for actuating the metering device 3 is provided so as to ensure blocking of the unlocking device 6 in operating states that are unsuitable for the operation of the anesthetic vaporizer 1. The locking device 5 is provided having a final control element 20, 24, 29 that covers a regulating distance that depends on a parameter influencing the operating state of the anesthetic vaporizer 1. This regulating distance of the final control element is transmitted to a blocking device 13 which blocks the unlocking device 6 if the values of the parameter are unsuitable for the operation of the anesthetic vaporizer 1.

Abstract: A process for the measuring of flat discoloration zones of an indicator substrate, which is transported into a measuring position and treated with a gaseous test medium there, is improved with regard to the measuring dynamic and the construction of the apparatus by producing a flow of the test medium along the surface of the section of an indicator substrate held in a measuring position, by providing several optical control zones staggered in the longitudinal direction of the test flow and by connecting it with an electronic evaluation instrument for the production of the measurement in such a way that the actual measure value is formed from the measuring of the discoloration of the indicator substrate along the control zones.

Abstract: A process for the measuring of flat discoloration zones of an indicator substrate, which is transported into a measuring position and treated with a gaseous test medium there, is improved with regard to the measuring dynamic and the construction of the apparatus by producing a flow of the test medium along the surface of the section of an indicator substrate held in a measuring position, by providing several optical control zones staggered in the longitudinal direction of the test flow and by connecting it with an electronic evaluation instrument for the production of the measurement in such a way that the actual measure value is formed from the measuring of the discoloration of the indicator substrate along the control zones.

Abstract: The invention is directed to an arrangement for generating a gas mixture. The arrangement includes a vaporizer which is switched into a vaporizer line which starts at a supply line and opens into a user line with the vaporizer line being bridged by a bypass line. The influence of material parameters associated with the metering of the vaporized gas quantity is reduced. For this purpose, the vaporizer line is alternately interrupted at the input and the output of the vaporizer and, when interrupted at the output side, the user line is interrupted by means of a switching element arranged therein.

Abstract: A test vial for the detection of gas components in air, containing a packing changing along the longitudinal axis of the test vial is improved in such a manner that, at a constant flow resistance, a sensitivity for the hazardous substance to be detected is obtained, which varies along the test vial. The provision is made that the packing consists of a combination of applied indicator and carrier substance at ratios varying along the longitudinal axis.

Abstract: The invention is directed to an electrically-actuable valve for a fluid such as a gaseous medium. The valve has a valve closure member disposed adjacent a valve plate provided with a plurality of pass-through openings. The valve closure member and the valve plate are displaceable relative to one another in a direction perpendicular to their surfaces by means of a short-stroke drive whereby a plurality of sealing lines are opened. To arrive at a good valve operation especially for relatively small valves, the valve plate is configured with a plurality of pass-through openings or perforations. The surface of the valve plate facing the valve closure member has a plurality of raised portions formed thereon defining respective receiving surfaces for receiving the closure member in contact engagement therewith to form the sealing lines when the valve is in the closed position.

Abstract: A ventilating system includes a high frequency controlled breathing gas source in HFJV operation, wherein the exhaled gas is removed through an outlet line through which a flush gas is conducted, is improved to permit a determination, under high frequency ventilation, of both the final expiratory CO.sub.2 concentration and the basic pressure building up in the lungs (the lung-internal PEEP). To this end, the control device is in addition connected to a flush gas valve provided upstream of the breathing gas supply device, and designed to intercalate a measuring interval after a sequence of breathing gas pulses, during which interval the breathing gas valve and the flush gas valve are closed. A system of measuring the breathing gas valves is provided in the outlet line and it is actuated during the measuring interval to perform the measuring operation.

Abstract: A device for connection to a respiratory gas line, particularly a narcosis apparatus, comprising, a terminal board having a first engagement surface thereon and a respiratory gas line defined therein with a first pair of connecting lines extending from the respiratory gas line to the engagement surface. An equipment unit for example, an evaporator or flowmeter is provided for connection to the respiratory gas line and has an adapter with a second engagement surface and a second pair of connecting lines extending to the second engagement surface. Structure is provided to align the first and second pairs of connecting lines to each other when the first and second engagement surfaces are engaged with each other to establish communication between the respiratory gas line and the second pair of connecting lines. A valve is also provided either in the first pair of connecting lines or in the second pair of connecting lines.

Abstract: An arrangement for determining a medium by means of a temperature sensor which is kept at a given excess temperature, in which the power to maintain the given excess temperature is determined, which includes a source of measuring radiation, a source of auxiliary radiation and the temperature sensor being exposed to a ray path of the measuring radiation and the auxiliary radiation, and means for generating a signal representative of a property of the medium, such as its absorptive or reflective capacity, its polarization properties, as well as correlative properties derivable therefrom.

Abstract: A respiration system and method for minimizing the oxygen concentration of inspiration gas supplied to a patient while maintaining a desired arterial oxygen partial pressure in the patient comprising a regulator for changing the oxygen concentration of inspiration gas supplied to a respirator according to a desired nominal value therefor and a sensed value therefor taken from the patient, a control device for adjusting parameters of the breathing gas in the respirator supplied to the patient while maintaining the desired arterial oxygen partial pressure, and a minimizer connected to the control device for changing a direction of the adjustment when the oxygen concentration in the inspiration gas cannot be maintained within a range between a first sensed instantaneous value for the oxygen concentration in the inspiration gas and a lower limit set for that value.