GB237970A - Improvements in devices for indicating the presence of explosive or combustible gases - Google Patents

Improvements in devices for indicating the presence of explosive or combustible gases

Info

Publication number
GB237970A
GB237970A GB11068/24A GB1106824A GB237970A GB 237970 A GB237970 A GB 237970A GB 11068/24 A GB11068/24 A GB 11068/24A GB 1106824 A GB1106824 A GB 1106824A GB 237970 A GB237970 A GB 237970A
Authority
GB
United Kingdom
Prior art keywords
wire
gas
platinum
metal
prepared
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.)
Expired
Application number
GB11068/24A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nautische Instr Ges GmbH
Original Assignee
Nautische Instr Ges GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US1525406D priority Critical patent/US1525406A/en
Priority to DEG57564D priority patent/DE410661C/en
Application filed by Nautische Instr Ges GmbH filed Critical Nautische Instr Ges GmbH
Priority to GB11068/24A priority patent/GB237970A/en
Publication of GB237970A publication Critical patent/GB237970A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
    • G01N21/716—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited by measuring the radiation emitted by a test object treated by combustion gases for investigating the composition of gas mixtures

Abstract

237,970. Martienssen, O., and Ges. f³r Nautische Instrumente Ges. May 5,1924. Gas analysis.-Apparatus for indicating the presence of explosive and combustible gases in the air comprises a gas-absorbing body of catalytic material in the form of a wire or band prepared for use by the deposit thereon at one or more points of a metal of the Pt or Pd group and electrically heated so as just to glow visibly at the points not prepared, the presence of gas being indicated solely by the prepared parts of the body becoming brighter and the amount of gas by the degree of brightness. The deposit is preferably produced by evaporating to dryness a drop of a salt solution of the metal on the heated wire or band. As shown, the wire is enclosed in a perforated glass globe G surrounded by a glass cylinder M closed by highly porous stones S, S' and asbestos packing-rings D, a perforated metal mantle F holding the parts together; the wire is heated by current from an accumulator in a casing U, gas reaching the wire through the stones S, S'. A variable resistance is placed in the circuit. The wire may be of platinum or of an alloy of platinum and a metal of the platinum group, such as rhodium or ruthenium, having a higher melting point than platinum, and preferably has a diameter of .06 to .08 millimeters. Specifications 3362/87, [Class 38, Electricity, Regulating &c.], 133/14, [Class 39 (ii), Electric lamps, Incandescent], and 213,587 are referred to.
GB11068/24A 1922-09-29 1924-05-05 Improvements in devices for indicating the presence of explosive or combustible gases Expired GB237970A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US1525406D US1525406A (en) 1924-05-05 Oscar martienssen
DEG57564D DE410661C (en) 1922-09-29 1922-09-29 Firedamp indicator
GB11068/24A GB237970A (en) 1924-05-05 1924-05-05 Improvements in devices for indicating the presence of explosive or combustible gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11068/24A GB237970A (en) 1924-05-05 1924-05-05 Improvements in devices for indicating the presence of explosive or combustible gases

Publications (1)

Publication Number Publication Date
GB237970A true GB237970A (en) 1925-08-05

Family

ID=9979399

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11068/24A Expired GB237970A (en) 1922-09-29 1924-05-05 Improvements in devices for indicating the presence of explosive or combustible gases

Country Status (2)

Country Link
US (1) US1525406A (en)
GB (1) GB237970A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603085A (en) * 1947-08-19 1952-07-15 Emhart Mfg Co Means for and method of ascertaining combustion characteristics of premixtures
US2829952A (en) * 1953-10-16 1958-04-08 Owens Corning Fiberglass Corp Process and apparatus for determining the combustible character of gases

Also Published As

Publication number Publication date
US1525406A (en) 1925-02-03

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