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(Pneumograph nach Lehmann. (Vergl. dessen: Körperl. Äussg. psych. Zust. 8.))
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1912 |
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taken from: Zimmermann, E. 1912. Psychologische und Physiologische Apparate. Liste 25.
(p. 0188, fig. 3011) |
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(Apparat zur Genauigkeitsprüfung des Augenmaßes nach Lehmann)
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1922 |
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taken from: Zimmermann, E. 1922. Liste 34: Über Optik, Ophthalmologische Apparate.
(p. 0007, fig. 40) |
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Plethysmograph according to Lehmann. The zinc sheet arm cylinder is surrounded by thick cotton-wool padding. Inside the cylinder a sack corresponding to the arm of fine soft rubber material is fixed upon the open end of the tube. The filling is done by the supply cock after inserting the arm in the rubber sack. The water is filling the space between the metalic cylinder und the rubber sack und rises in the unscrewed glass pipe of 10 cm height, from which a rubber tube is leading to the recorder. To increase the pressure the glass pipe has to be exchanged to one of 25 cm height. The elbow is adjustable by an inholsterd rest on the scale. The entire apparatus may be hanged up by chains and combined with the device n° 3042 with great advantages. Without special specifications the metal cylinder has a circumference of 31 cm and a length of 32 cm (see n° 3051-3054). The apparatus serves also as hydrosphygmograph if the cock leading to the water gauge bottle remains open. 3,100 kg.
(Plethysmograph nach Lehmann)
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1922 |
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taken from: Zimmermann, E. 1922. Liste 43: Über Blutdruckapparate.
(p. 0021, fig. 3050) |
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Pneumograph according Lehmann (compare: Körperl. Äussg. psych. Zust. 8.). The metalic hollow capsule of the apparatus is closed by two rubber membranes. Tube points are leading to the hollow space behind the membranes and between the membranes. With the operation of the apparatus air is sucked from the back chamber, during that process air streams through the second tube point between the membranes. If the inlet is closed, the air cushion mediates between the pressure in the pan and the corresponding recording lever. The apparatus is fixed with strings or may be worn under the cloth for the registration of the abdominal respiration. 0,120 kg.
(Pneumograph nach Lehmann. (Vergl. dessen: Körperl. Äussg. psych. Zust. 8.))
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1922 |
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taken from: Zimmermann, E. 1922. Liste 43: Über Blutdruckapparate.
(p. 0017, fig. 3011) |
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Carotid pulse recorder capsule according to Lehmann. An air capsule, that is adjustable perpendicularly to the carotid is fixed at a metal clip, that is fixed at the neck by a string. A second capsule serves as a support point for the adjustment. 0,380 kg.
(Carotispulsaufnahme-Kapsel nach Lehmann. In dem metallenen Bügel, der durch ein Band am Halse befestigt wird, ist eine rechtwinklig zur Carotis einstellbare Luftkapsel befestigt. Eine zweite Kapsel dient als Stützpunkt für die Einstellung. kg 0,380.)
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1922 |
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taken from: Zimmermann, E. 1922. Liste 43: Über Blutdruckapparate.
(p. 0016, fig. 2990) |
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(Apparat zur zeitlichen Verschiebung gleichzeitiger Reizung bei der Aufmerksamkeit. (Lehmann, Körp. Äußg. II. 272.))
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1923 |
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taken from: Zimmermann, E. 1923. Liste 35: Über Tachistoskope, Gedächtnisapparate.
(p. 0014, fig. 670) |
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Apparatus for the temporal delay of simultaneous attention stimulations. (Lehmann, Körp. Äußg. II. 272). A motor driven axis has two oppositionally adjustable pointers Z, of which the one in the front rotates in front of a scale C, that covers the other parts of the apparatus. By the rotation of the second pointer a mercury contact T is completed, so that the axis is braked electromagnetically by B and the pointer lies still. At the same time a clock signal rings, that is connected to the electrical circuit and can be adjusted by the adequate tension of the spring and the arresting magnet in such a modus that the both strokes seem to be one. A supplement between armature and arresting magnet E prevents the braking effect of the axis and the pointer is rotating meanwhile the clock rings. The obsever (candidate) estimates the position of the pointer in relation to the stroke of the clock. Instead of this a pressure stimulation would serve as well. 3,500 kg.
(Apparat zur zeitlichen Verschiebung gleichzeitiger Reizung bei der Aufmerkamkeit. (Lehmann, Körp. Äußg. II. 272))
|
1923 |
|
taken from: Zimmermann, E. 1923. Liste 33: Über Psychotechnik.
(p. 0013, fig. 670) |
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Tester for the accuracy of visual estimate according to Lehmann. The two marks A and B on the one side with a distance of 20 mm are prolonging the ends of the millimeter-scale on the opposite side. The line on the slide can be moved by a micrometer screw. The candidate has to move this screw deviding the distance A-B by visual estimation in proportions that have been defined before meanwhile the scale is covered by a hinged lid. So the deviation of the estimation can be determined with a measure of variation of 1/10mm by comparing the scale with the devided head of the millimeter screw (line on the slide); 0,600 kg.
(Apparat zur Genauigkeitsprüfung des Augenmaßes nach Lehmann)
|
1923 |
|
taken from: Zimmermann, E. 1923. Liste 33: Über Psychotechnik.
(p. 0003, fig. 40) |
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Pneumograph according to Lehmann (compare his: phys. ex. psych. const. 8).
(Pneumograph nach Lehmann. (Vgl. dessen: Körperl. Äussg. psych. Zust. 8.))
|
1923 |
|
taken from: Zimmermann, E. 1923. Liste 33: Über Psychotechnik.
(p. 0053, fig. 3011) |
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Capsules for the observation of the carotid pulse according to Lehmann
(Carotispulsaufnahme-Kapsel nach Lehmann)
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1928 |
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taken from: Zimmermann, E. 1928. Psychologische und Physiologische Apparate: Liste 50.
(p. 0243, fig. 2990) |
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