DE268963C - - Google Patents
Info
- Publication number
- DE268963C DE268963C DENDAT268963D DE268963DA DE268963C DE 268963 C DE268963 C DE 268963C DE NDAT268963 D DENDAT268963 D DE NDAT268963D DE 268963D A DE268963D A DE 268963DA DE 268963 C DE268963 C DE 268963C
- Authority
- DE
- Germany
- Prior art keywords
- resistance
- circuit
- switched
- gases
- lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007789 gas Substances 0.000 claims description 5
- 230000003197 catalytic Effects 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000003287 optical Effects 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims 1
- 239000002360 explosive Substances 0.000 claims 1
- 238000010792 warming Methods 0.000 claims 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 241000131971 Bradyrhizobiaceae Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 229910052904 quartz Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
-M 268963 KLASSE 74 b. GRUPPE -M 268963 CLASS 74 b. GROUP
Patentiert im Deutschen Reiche vom 12. Januar 1913 ab.Patented in the German Empire on January 12, 1913.
Die den Gegenstand vorliegender Erfindung bildende Vorrichtung beruht auf der Eigenschaft mehrerer Körper, daß ihre elektrische Leitfähigkeit mit steigender Temperatur in außerordentlich hohem Maße zunimmt. Ein solcher Körper ist z. B. das metallische Bor, welches bei einer Temperatur von 520 ° etwa ein Hunderttausendstel des bei 27° gemessenen Widerstandes besitzt, ferner die in den Nernstlampen verwendeten Oxyde verschiedener Erdmetalle, welche bei gewöhnlicher Temperatur Nichtleiter und von 5 bis 600 ° ab gute Leiter sind. Die Vorrichtung besteht aus einer tragbaren elektrischen Stromquelle, in deren Stromkreis ein derartiger Widerstandskörper und eine beliebige elektrische (optische oder akustische) Signalvorrichtung geschaltet ist. Der Widerstandskörper ist mit einem katalytisch wirkenden Überzug aus Platinschwamm o. dgl. versehen, eventuell unter Zwischenschaltung einer isolierenden, hitzebeständigen Schicht, wie Glimmer, Quarz o. dgl., welcher mit dem zu prüfenden Gasgemisch in Berührung gebracht wird. Während in reiner Luft die Leitfähigkeit des Widerstandskörpers so gering ist, daß er einen Stromdurchgang durch die Signalvorrichtung praktisch verhindert, wird bei einem Gehalt der Luft an brennbaren Gasen die katalytische Substanz und damit der Widerstandskörper erwärmt; letzterer vermindert seinen Widerstand auf einen wesentlich geringeren Wert, und die Signalvorrichtung wird nunmehr in Tätigkeit gesetzt. The device which is the subject of the present invention relies on the property several bodies that their electrical conductivity with increasing temperature in increases to an extraordinarily high degree. Such a body is e.g. B. the metallic boron, which at a temperature of 520 ° about one hundred thousandth of that measured at 27 ° Resistance, furthermore the oxides of various earth metals used in the Nernst lamps, which at ordinary temperature non-conductors and from 5 to 600 ° from good Are leaders. The device consists of a portable electrical power source, in whose circuit has such a resistance body and any electrical (optical or acoustic) signal device is switched. The resistance body is with a catalytically acting coating of platinum sponge or the like. Provided, possibly under Interposition of an insulating, heat-resistant layer such as mica, quartz or the like, which is brought into contact with the gas mixture to be tested. While in pure Air, the conductivity of the resistor body is so low that it allows a current to pass through practically prevented by the signaling device, if the air is combustible Gases heat the catalytic substance and thus the resistance body; the latter reduces its resistance to one significantly lower value, and the signaling device is now put into operation.
Beiliegende Zeichnung gibt eine Ausführungsform der Vorrichtung in Verbindung mit einer elektrischen Lampe wieder. Es bezeichnet a die Stromquelle, zweckmäßig einen Akkumulator, an dessen Polen eine Glühlampe b (Arbeitslampe) angeschlossen ist. An denselben Polen liegt ein zweiter Stromkreis, welcher eine Glühlampe f oder eine andere optische oder akustische Signalvorrichtung und einen Widerstandskörper c enthält. Letzterer ist mit einer katalytisch wirkenden Substanz d, wie Platinmoor, überzogen. Die ganze Vorrichtung ist derartig in einem Schutzgehäuse eingeschlossen, daß die zu untersuchende Luft freien Zutritt zu der katalytischen Schicht d hat. Die Vorrichtung wirkt nach dem oben beschriebenen Prinzip in der Weise, daß nur bei Vorhandensein von brennbaren Gasen die Signalvorrichtung f zur Wirkung kommt, weil alsdann der Widerstand des Körpers c infolge seiner Erwärmung durch die katalytische Substanz d sich bedeutend verringert.The accompanying drawing shows an embodiment of the device in connection with an electric lamp. It denotes a the power source, expediently an accumulator, to whose pole an incandescent lamp b (work lamp) is connected. At the same poles there is a second circuit which contains an incandescent lamp f or some other optical or acoustic signaling device and a resistance body c. The latter is coated with a catalytically active substance d, such as platinum moor. The entire device is enclosed in a protective housing in such a way that the air to be examined has free access to the catalytic layer d . The device works according to the above-described principle in such a way that the signal device f only comes into effect when combustible gases are present, because then the resistance of the body c as a result of its heating by the catalytic substance d is significantly reduced.
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE268963C true DE268963C (en) |
Family
ID=525872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT268963D Active DE268963C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE268963C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6090893A (en) * | 1994-12-16 | 2000-07-18 | Borealis Polymers Oy | Polyethylene composition |
| US6822051B2 (en) | 2002-03-29 | 2004-11-23 | Media Plus, Inc. | High density polyethylene melt blends for improved stress crack resistance in pipe |
| US7867588B2 (en) | 2001-12-17 | 2011-01-11 | Media Plus, Inc. | Polyethylene melt blends for high density polyethylene applications |
-
0
- DE DENDAT268963D patent/DE268963C/de active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6090893A (en) * | 1994-12-16 | 2000-07-18 | Borealis Polymers Oy | Polyethylene composition |
| US7867588B2 (en) | 2001-12-17 | 2011-01-11 | Media Plus, Inc. | Polyethylene melt blends for high density polyethylene applications |
| US6822051B2 (en) | 2002-03-29 | 2004-11-23 | Media Plus, Inc. | High density polyethylene melt blends for improved stress crack resistance in pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE917821C (en) | Electric moisture meter | |
| DE2847739A1 (en) | DEVICE FOR DETERMINING THE EXPLOSION LIMITS OF GASES | |
| US2531747A (en) | Metal identifier | |
| DE2733906A1 (en) | DETECTOR FOR DETERMINING GAS COMPOSITION AND PROCESS FOR ITS PRODUCTION | |
| DE268963C (en) | ||
| DE1947844A1 (en) | Method and device for gas analysis | |
| Wolff et al. | Preconcentration of cadmium, copper, lead, and zinc in water at the 10-12 g/g level by adsorption onto tungsten wire followed by flameless atomic absorption spectrometry | |
| DE1134222B (en) | Device for catalytic gas analysis | |
| DE2210531A1 (en) | Device for measuring the activity of cadmium ions | |
| DE494494C (en) | Apparatus for analyzing gas mixtures | |
| DE3118936C2 (en) | Use of a measuring method for gaseous or vaporous media and a device for this | |
| DE2442593B2 (en) | Sensor for the detection and / or measurement of alcohol and a manufacturing process for it | |
| Russell et al. | Relation of airborne nitrate to telephone equipment damage | |
| EP0527259A1 (en) | Gasdetektor with semiconductive galliumoxide | |
| DE2942516C2 (en) | Gas detection element for the detection of hydrogen sulfide | |
| DE3618690A1 (en) | Radiation source for an infrared gas analyser | |
| DE2316365A1 (en) | ELECTROCHEMICAL MEASURING CELL FOR CONTINUOUS MEASUREMENT OF THE CARBON MONOXIDE CONTENT IN THE AIR | |
| DE506795C (en) | Device for indicating the presence of harmful gases in the atmosphere | |
| DE825909C (en) | Device for the detection of mercury vapor | |
| Plus | Recent Advances of Electrochemical Techniques in Food, Energy, Environment, and Forensic Applications | |
| DE418399C (en) | Device for gas analysis, consisting of an expansion wire and a catalyst which heats it and which is heated by an electric heating wire | |
| DE3711071A1 (en) | Method and device for measuring the ozone content of gas and water | |
| Kleperis et al. | Gaseous sensors based on solid proton conductors | |
| Song | Impact of dust on the reliability of printed circuit assemblies | |
| DE349299C (en) | Device for determining the concentration of a component of a gas mixture |