National Institute of Occupational Safety and Health, Japan
A Designation System of Accident Causation Factors for Classified Statistics
SH-1959-3-1
O.FUKUMORI and T.KOSAKA
: There designations will to serve for compilation of classified statistics to be used for accident prevention through revising or protecting those factors which are scrupulously screened from all possible ones that may constitute an accident and are determined to contribute to actual causation of the accident.
Subjects for designation to be considered are as follows:
1. Agency: agency is an object or substance directly associated with occurrence of the accident.
2. Unsafe Condition: unsafe condition is a condition that the agency is in such a state that it may cause an accident.
3. Unsafe Act: unsafe act is an act that may possibly result in occurrence of accident.
4. Accident Type: accident type is a way in which the injured come into contact with object or substance.
5. Unsafe Personal Factor: unsafe personal factor is an unsafe mental or physical factor of the person who committed unsafe act.
6. Type of Injury: type of injury is a type of injury sustained by the person or type of impairment of ability on the part of the body in question.
7. Part of Injury and its extent.
8. Inflicting Agent: inflicting agent is object or substance inflicting injury to substance inflicting injury to the person.
Effective and accurate tabulation of every and each of these factors makes it consequently possible to find cause of accident.
The Instrument to Measure the Slipperiness of the Floor (1st Report) --About the Slipperiness of Walkway Surfaces--
SH-1959-3-2
J.SAITO and K.ARAI
: To measure the slipperiness of the floor, we constructed the instrument of the pendulum impact type which is nearly the same as that of the one manufactured by the U.S. National Bureau of Standards, and tested for several flooring and finishing materials with test heels of rubber, leather, and special rubber threaded with fibre.
On Hazards of Igniting Gun-Powder Through Breakage of Incandeacent Lamps or Fluorescent Lamps (1st Report)
SH-1959-3-3
S.KOZUKI and K.SAKANUSHI
: We studied on hazards of whether a bit of gun-powder scattered on the upper surfaces of incandescent lamps or fluorescent lamps would be ignited through breakage of the lamps or not, and obtained the following results.
1. In cases of incandescent lamps;
(a) The Black-powder, T.N.T. and Black carlit are all ignited when the lamps working at 90 volts ( 90 % of the rated voltage) are broken.
(b) The Ammonium nitrate explosives are not ignited through breakage of the lamps working even at 110 volts ( 110 % of the rated voltage).
2. In cases of fluorescent lamps;
(a) The Ammonium nitrate explosives are not ignited.
(b) The ignitions of the Black-powder and T.N.T. are often occurred when the lamps were broken during the time of the pre-heating of filament, but scarcely occurred when broken on steady-state discharge of the lamps.
(c) If the base of lamp would be fixed on with the socket after the breakage of lamp, the Black-powder and T.N.T. may be ignited with the heat of filament as the glow-lamps re-start.
