Abstract: A testing device for checking a clock signal generated by a clock pulse generating circuit. The clock pulse generating circuit outputs a clock signal and a multiplied clock second signal. The testing device includes a reset circuit, a dividing unit and a mask circuit. The reset circuit receives a first reset signal and the clock signal and then generates a second reset signal synchronous with the clock signal. The second reset signal controls the dividing unit and the mask circuit. Inside the dividing unit, the multiplied clock signal is divided by an integral multiple to produce a divided clock signal. The divided clock signal is then passed to the mask circuit where uncertain portions of the third signal are blanketed to produce a masked clock signal. The masked clock signal is sent to a tester where cycle width of the masked clock signal is measured and first reset signal is sent to the reset circuit.

Abstract: A process for manufacturing various series of plug-in light bulbs wherein a glass tube used in making a Wedge lamp having an increasing diameter toward one end, inserting two conductive wires and a button rod within this tube integrated with its bottom end by heating, pinching and attaching three filaments to the top portion of the button rod by heating and connecting to the conductive wires with a plurality of tungsten filaments to form a glow portion, inserting a bulb portion over the top end of the tube, then shaping a integral body by heating a lower portion of the tube rod slightly below the bottom end of the button rod, which is fused off by heating, the lower portion of the conductive wires being folded and stuck to the respective outside walls of the bottom end of the tube.