Abstract: The purpose of the present invention is to provide a potassium fluoromanganate for use as a raw material for a manganese-activated complex fluoride phosphor, from which a manganese-activated complex fluoride phosphor having good fluorescence properties and reliability can be produced. The potassium fluoromanganate of the present invention is characterized in that, in an orbital electron binding energy spectrum diagram for manganese obtained by X-ray photoelectron spectroscopy, a ratio (signal intensity value A/signal intensity value B) between a signal intensity value A obtained by subtracting a background value from a maximum signal intensity value for binding energy values within the range from 643.0 eV or more to 644.0 eV or less, and a signal intensity value B obtained by subtracting the background value from a maximum signal intensity value for binding energy values within the range from 645.0 eV or more to 646.0 eV or less, is greater than 0 and no greater than 0.9.

Abstract: A safety hook is provided with a spring loaded closure segment normally closing the mouth of the hook. A pin carried by the segment is normally engaged by a spring loaded crank latch. The crank latch prevents the pin and segment from rotating to open the hook mouth until the crank latch is first rotatably released under the influence of a force acting to rotate the latch in a direction opposite to the direction of rotation which would occur under the influence of the force which would be transmitted from the segment to the latch in opening.