ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17167.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17168.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17169.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTA descriptive paper in which the author refers to electrically heated travelling leers and stationary furnaces now in use for annealing various kinds of glassware, including special ware, miniature lamp bulbs and stems, conveyor leers for bottles, and box furnaces for optical glass.The operating characteristics of the conveyor leers are discussed, and the electric energy consumed for a typical week's run is given, from which as a basis, costs of operation may be estimated.An equipment for annealing lenses and prisms of optical glass is described in some detail, and a proposed furnace with control equipment of great accuracy for annealing large disks for telescopes is illustrated and discussed at some length.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17170.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTThe most common types of fuel burning equipment and the usual methods of their installation, originally developed and perfected for power plant use, are not suitable for the ceramic industory and result in excessive costs and difficulties in operation and control. When fuel oil is considered not a substitute for coal but an independent fuel with characteristics somewhat radically different from those of coal, and the kiln construction together with method of firing is changed to meet these characteristics, oil firing proves superior to coal firing in nine cases out of ten.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17171.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17172.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17173.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17174.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17175.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTThe network of fine cracks often seen in the surface of glazed products not only mars the surface but shortens the life and lowers the price of the ware. Since the relative expansivity of the glaze and body is a very important factor in controlling this condition reliable measurements of both are of the utmost importance. Until recently the difficulty has been that the expansivity of the glaze has been measured on specimens of the material melted to glass and drawn into rods or cast in molds of sufficient length. Owing to the difference between this treatment and that received by the material when spread on the ware, it was realized that these methods might lead to unavoidable errors.By the interference method, specimens 0.2 mm. in length can be measured with sufficient accuracy. Therefore in measuring glazes the samples may be taken directly from the finished ware. In this paper the thermal expansion of glaze materials prepared in the form of drawn glass or cast rods is compared with that of the same material taken from the finished ware. From the measurements, the expected divergence is found to be as much as 20% in the case of drawn glass specimens, and 10% for cast specimens.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb17176.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY