and the rear wall 18 biases the second pin 20 to the second position within the housing cavity as illustrated in fig9 wherein a detent leg 34 of a flexible shape retentent material projects from an interior surface of the rear wall 18 to a rear surface of the base 31 extending from a position exteriorly of the base 31 to position adjacent the outer edge of the base 31 whereupon vibration to the pin 20 deflects the base relative to the detent leg 34 permitting the tension spring 32 to retract the second pin 20 to the second position further the first switch 14 includes a first switch slide 21 see fig5 with the slide 21 slidably mounted within a slot 22 the slide includes a slot top wall 23 spaced from a slot bottom wall 24 including respective top and bottom wall resilient pins 25 and 26 to maintain orientation of the slide 21 to an on or off position adjacent opposed distal ends of the slide to prevent the switch from inadvertently being oriented towards an off position during earthquake and maintain the desired setting of the switch within the slot 22 as illustrated displacement of the second pin 20 to the second position effects displacement of the housing 11 to a housing second position as illustrated in fig2 actuating the mercury switch 15 or second switch to effect illumination of the illumination bulbs 13 as to the manner of usage and operation of the instant invention the same should be apparent from the above disclosure and accordingly.