摘要:

Letter ofTransmittalThis paper is part of the proceedings of the Standard Testing Procedure Committee of the Glass Container Association of America. The reasons that caused the Committee to ask for a more or less formal statement of what was known on this subject will be apparent from the paper itself. The members of the Committee, namely, Mr. Bowes, Mr. Flint, Mr. Hiller, Mr. Lyon, and Mr. Roche, as well as Mr. Hendrickson, Mr. Lester, myself, and various others associated with the Committee, have read the paper and offered criticisms Although we do not necessarily, either as individuals or as a Committee, concur in all that is said, we believe that the paper offers a new approach to some difficult problems connected with strength, a primary concern of the Committee, and that it may act as a basis for industrial advances or for further contributions by others outside the Committee.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14346.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractAn investigation was undertaken to determine whether or not the Preston hydrostatic pressure machine, modified so that an initial pressure of 25 lb. per sq. in. may be obtained, is capable of predicting bottling‐line production breakage by pressure tests on samples of the bottles in use. The quart and fifth‐gallon bottles investigated were round, whereas the pint and half‐pint bottles were of the flask type.Correlating data between production and the percentage of test breakage for quart and pint bottles are significant, and data for fifth gallons, although less significant, are definitely positive. Half‐pint data yielded no significant relationship between the percentage of production breakage to test breakage, but this is probably the result of abnormal bottling‐line conditions.A method of determining the range of production breakage percentage to that of test breakage by the use of the standard error of estimate is

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14347.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractA number of steatite ceramics were prepared under carefully controlled conditions, and their dielectric losses and direct‐current resistances were measured at elevated temperatures. It was found that variations of the ratio of talc to kaolin within certain limits had little effect on the dielectric properties. These properties, however, were changed to a considerable extent by varying the amounts, proportions, and kinds of alkaline earth oxides added as fluxes. The data indicate also that the conditions in a ceramic favorable to a high specific resistance are not necessarily those favorable to a low dielectric los

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14348.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractA review of the literature is given. A number of steatite bodies, which were given a varying number of firings, were investigated by autoclaving and determining the water absorption in conjunction with microscopic and X‐ray method

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14349.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractAn apparatus for measuring the thermal conductivity of refractories, is described in detail, and results are shown for several types of insulating refractories. Comparisons are madc from data which were obtained on a low‐temperature plate tester, and the effect of several variables on measured heat flow are discusse

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14350.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractVarious methods of determining the consistency of mortars are discussed, and data are included to show the test results obtained on different instruments. A description is given of a modified Vicat needle which may be used for the control of consistency during the manufacture of wet‐type, cold‐setting mort

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14351.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractThermal‐shock resistance tests were made on enamels of varying thermal expansions applied on test pans. Increased weight of application and high expansion of the cover coat decreased the thermal‐shock resistance, whereas high expansion of the ground coat increased the resista

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14352.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY