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 this issue. 



TECHNOLOGY. — An investigation of cartridge enclosed fuses. Report 

 of the Bureau of Standards in the case of Economy Fuse and Manu- 

 facturing Co. vs. Underwriters' Laboratories (Inc.) concerning the 

 fire and accident hazard of the Economy Refutable Fuse as compared 

 with approved fuses. E. B. Rosa, H. B. Brooks, B. McCullom, 

 W. J. Canada, and F. W. Gladding. Bureau of Standards 

 Technologic Paper No. 74. Pp. 199. 1916. 

 This report represents the results of the investigation carried out 

 by the Bureau of Standards acting as referee on the joint request of 

 the Economy Fuse and Mfg. Co. and Underwriters' Laboratories, Inc., 

 on the question of the relative fire and accident hazard of Economy 

 Refillable fuses and fuses at present listed as standard by Underwriters' 

 Laboratories, Inc. The evidence on which the finding of the Bureau 

 was based includes a large number of tests of fuses under widely differ- 

 ent conditions, as well as inspections of numerous fuse installations in 

 practice, personal interviews with many fuse users, evidence and argu- 

 ments submitted by the Economy Fuse and Mfg. Co. and Under- 

 writers' Laboratories both at a public hearing and by correspondence, 

 and evidence and arguments submitted by a number of manufacturers 

 of fuses at present listed as standard by Underwriters' Laboratories. 

 The investigation disclosed that the experience with the present type 

 of Economy fuse is not yet sufficient to determine whether the total 

 hazard is greater or less than it is with approved fuses as they are 

 actually used in practice. The report contains numerous tables and 

 110 oscillographic records showing the performance of both Economy 

 and approved fuses under various short circuit conditions. 



B. McC. 

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