Abstract of RIIS Report ( SH-1959-1 )
National Institute of Occupational Safety and Health, Japan
About the Aging Strength of the Life Lines
SH-1959-1-1 |
T.ANDO and T.SATO |
: To find visually the aging strength of life line, we examined about the many ropes used in some lime stone mines. |
Study on Closed Type Explosion Test Apparatus
SH-1959-1-2 |
N.TAGUCHI, M.NAITO and F.ISHIMI |
: For the explosion test of the explosion-proof electrical equipments, we designed and constructed the closed type explosion test apparatus. |
The Limits of Flammability of Butane Gas --Influence of Pressure--
SH-1959-1-3 |
M.NAITO |
: By the closed explosion test apparatus, I studied on the limits of flammability of Butane Gas of three kinds having different component under pressures of 1 to 5 atmospheres. The result showed that the explosion range of Butane Gas spreads with rise of pressure, that is, it was approximately 2 to 8 per cent in air at normal condition and at 5 atmosphere was 2 to 15 per cent, therefore, only the upper limit was influenced by pressure. |
Investigation on the Accident in Construction the Kaimon Bridge
SH-1959-1-4 |
T.HAKAMAZUKA and K.ISHIBASHI |
: In construction of the Kaimon Bridge by cable erection method, the cable towers collapsing, three workmen died and two were injured in the morning Dec. 29th. last year. |