A-A-50444
2. The light case shall be suitable to receive a standard “D” cell alkaline battery and shall have a minimum inside diameter, excluding all switch parts and contact strip, of 1.44 inches. It shall be as light as possible and show no cracks or flaws when subjected to the impact test. The light shall be maintained at a temperature of minus 20 degrees Fahrenheit (oF) for 2 hours, and then be subjected, while at this temperature, to a 12 inch-pound impact using a 1 pound steel ball. The point of impact shall be normal to any plane through the axis of the tubular body midway between the bottom and top of the case. Impact tests shall be conducted on assembled lights (without batteries).
3. The case shall be made of plastic, orange in color, and shall not deform when subjected to a temperature of 150oF nor become brittle when subjected to a temperature -20oF, both for a period of 2 hours.
4. A switch shall be mounted on the case and shall be watertight push button type. All parts of the switch except contacts and springs shall be made of corrosion resisting metal. Contacts and springs shall be made of corrosion-resisting metal or metal treated to prevent corrosion. The complete switch shall be as small as practicable and the overall height above the outside surface of the case shall not exceed 9/16 inch. All metal parts of the switch in case metal-clad cells are used. The switch shall be of a permanent contact with the metal disk in which the flashtube is mounted, when the light is completely assembled. The opening and closing of the circuit shall be accomplished in the switch itself. Switches shall be capable of operating through 5000 cycles at 15 cycles per minute.
5. The light and switch shall both be watertight when submerged for 1 hour in seawater or equivalent salt water solution having a specific gravity of 1.025 to 1.040, to such a depth that the highest point of the light is under a 3 foot head. After removal from the water, the light shall be examined for leakage of water into the switch, and into the interior. The light shall be operable after the test and there shall be no evidence of internal moisture.
6. The case shall be provided with a metal safety pin for securing the complete light to a fabric. The pain shall be made of continuous, spring tempered wire, looped over on itself to form a securing loop for the pin and shall have an overall length of not less than 2 inches. The point of the pin shall be rounded to prevent puncturing of inflatable fabrics. When in the closed
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