Stay-awake device for drivers, pilots and watchmen

摘要

Stay-awake device for drivers, pilots and watchmen, by pressing with thumb in a frame 1 on a thumb-pressure bracket 3 and thus on a rubber 2 or a helical compression spring, which tend to press the thumb, if it applies too weak a counterpressure in the event of overtiredness of the driver, against a pointed screw 4 which can be adjusted before use so that it thus hurts and protects against falling asleep and thus keeps the driver awake effectively. IMAGE