be connected electrically by any of the known expedients such as by means of male and female connecting elements a single cell battery 38 is positioned within the receptacle and may be maintained in correct disposition by means of a pair of buss strip contactors 40 secured within the receptacle adjacent each of the opposed sides thereof the buss contactors also connects the power cell with the printed circuit board as is well known the battery is desirably of 1 5 volt capacity however it is within the contemplation of the invention to employ a cell of greater or lesser capacity providing portability of the article is not affected adversely a capacitor 42 preferably a 220 microfarad electrolytic capacitor is situated within the receptacle and is connected in the circuit across the pins of the chip in a manner which will be apparent to persons skilled in the art two arrangements found to be eminently satisfactory are shown in fig6 and 7 the linear integrated oscillator circuit 44 is the lm3909 manufactured by national semiconductor corp and is electrically connected to the printed circuit board 32 so as to form a part of the circuit for intermittently effecting the flashing of the light emitting diode 16 the chip 44 is desirably connected in one of the circuits shown in fig6 and 7 a switch 46 is connected in series with battery 38 and may be of the mercury type although as will be recognized other appropriate types of switches may be employed in fig3 and 4 it will be observed that a.