Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1743035 A
Publication typeGrant
Publication dateJan 7, 1930
Filing dateJan 15, 1926
Priority dateJan 15, 1926
Publication numberUS 1743035 A, US 1743035A, US-A-1743035, US1743035 A, US1743035A
InventorsGaylord H Halvorson
Original AssigneeGaylord H Halvorson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Determining volatile matter in combustible material
US 1743035 A
Previous page
Next page
Description  (OCR text may contain errors)

Jan. 7, 1930. Gfx-L HALvoRsoN 1,743,035


This invention relates to a new and imdrawing a preferred form of apparatus for proved method for determining the volatile carrying out my improved method. matter in fuel, or other material. In the drawing,

Tests of this character are in general use Figure 1 is a perspective View showing the 5 for a number of purposes and particularly in Crucible casing and L connection with determining the volatile con- Figure 2 is a vertical section through the tent of fuels such as coal. Here the volatile Crucible and Casing. content is an indication of a quality of the The cruciblecasing comprises the body 11 coal and of its suitability for various fuel and Cover 12 preferably formed of magnepurposes. It is highly important that tests site, although it may be formed of other re- 60 such as these be so standardized as to enraCllOry material capable 0f Standing high able different chemists in different laboratctemperatures. As shown in Figure 2, the ries to arrive at the same result in the tests Cover l2 iS provided With a Circular flange of similar samples, y V13 which surrounds a 'circular flange 14 on the 15 A method now in general use consists in body member in order to insure a complete 65 placing' a one gram sample in a platinum enclosure of the Crucible 15.V This Crucible Crucible of 15 cubic centimeters capacity and l5 may be formed of platinum, or any suitin placing the crucible in the from 0f a able material. The bottom 16 of the casing furnace registering 500 degrees centigrade body 11 1S preferably thinner than the side until the flame subsides and then placing it Walls and top of the casing and the casing 30 in the interior of a muffle where the tempera- 1S Sdppoltod by logs 17 So that tllo loottom l5 ture is 950 degrees centigrade for three minout of Contact Wltll tho Support upoll Wllloll utes, after which it is cooled and weighed, the tho odsmg ToStS- Y loss in weight representing volatile matter. In the use 0f my device, according to my In carrying out the above method a variation method, the Sample of tllo material to loo `7 5 of one-half inch in the location of the crutostod l5 pldood lll tlleofuolble and the Crucible during the preliminary ignition may ollolo PlaCeCl 1n the CaSing- The Casing concause a variation in the volatile content detalmrlg the Crucible iS then placed directly termination 0f as much as 'Z5/100 0f 1% in t-lie muftle, which preferably is atatemper-- precautions may be able to Obtain uniform l'leSll'ie Casing ll'lSlllalleS the, CIllCllOle SO results, it is very diiicult for dierent laboratho Sdmple ls not lofttod too l'dpldly- Tho tories to so manipulate the method that the foto of hodtmg Wlll loo u mlolm at all tlmeS C0341 will not be ignited more rapidly in one and results secured by dierent laboratories 35 @ase than in the @than using this apparatus will be truly comparable. 85

It is an object of the present invention to I have Shown one preferred form of 8Jppt provide a new and improved method for mtu? for Carrymg out my mprOYe method the determination of the volatile matter in but lt 1S .to loe/.understood that t'hls 1S Capable fuel or other material, whereby the determi- 0i modlcatlondand. I contemplate Such nation may be carried out by diiferent persons C @tiges and m0 l Canons as come W-lthm the "'90 with the assurance of securing uniform re- Splnctldcope of thef appended Clalms sults 1. That ste in the method of determininor It 1 5 a further ololecJ0 to Provlde a method volatile contdiit of material which includet of thls olldl'dotol" ddttptod to be .Ca-flod. out placing a receptacle having a sample of this 95 by the use of simple apparatus Wltll ldpldlty material in a closed vessel and placing said and efhciency.' vessel in a furnace uniformly to heat said Other and further objects will appear as sample, the description proceeds. 2. That step in the method of determining Si) I have illustrated in the accompanying volatile content of material which includes 30 Vhilev the same chemist using reasonable atllro of 950 dogmes ooltlglodo- Tho mag- `80 Y placing a platinum receptacle having a sample of thismaterial in a closed refractory vessel and subjecting said vessel to heat in an oven uniformly to heat Said sample.

e 3. That improvement in methods of determining the volatile content of combustible material which consists in weighin .a sample ofthe material, placing the weig ed sam ple ina container, enclosing the container in an insulating casing, applying toA theY casing heat of a predetermined temperature' in order to heat the sample,- removing the sample from the casing and the container, and finally Weighing the removed sample to'compare its Weight before and after being submitted to the heat treatment.- f f y 4. That improvement in methods VVof de termining the volatile content of combustible material which consists in, Weighing a sample of the material, placing theweig-hed' sample in agfcntainer enclosed in an insulatingV l casing, applying to the casting'hea't of a pre- 0f. Jannarg 1926.

y G man' H. HALvoRsoN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2688532 *Nov 2, 1951Sep 7, 1954Western Electric CoMethod of determining carbon content of organic finishing material
US4565669 *Apr 21, 1983Jan 21, 1986Cem CorporationMicrowave ashing apparatus
U.S. Classification436/155, 436/908
International ClassificationG01N33/22
Cooperative ClassificationG01N33/222, Y10S436/908
European ClassificationG01N33/22B