Abstract: The present invention relates to a gas lighter with a roller-rotation restraining part, extending toward a roller from one side of a top surface of a cap for surrounding a nozzle of the gas lighter so that the roller-rotation restraining part is caught by and brought in contact with the roller. Thus, a certain rotation-restraining force is added to the rotation of the roller by means of the roller-rotation restraining part which is caught by and brought in contact with the roller during the rotation of the roller for ignition to increase a finger grasp force required for the ignition of the gas lighter through the rotation of the roller, thereby being capable of preventing an accident, should the lighter get into the hands of a child.

Abstract: An insect-catcher has a frame, a cover and a gathering base. The frame has an open top and a bottom. The top has at least one key mounted on the edge of the open top and protruding from the open top. The cover detachably covers the open top of the frame and has at least one light tube, a high-voltage net and at least one safety switch. Each safety switch has an activating lever aligning with the keyway and pressing against one key. The gathering base detachably connects to the bottom of the frame. The activating lever disengages from the key and turns off the high-voltage net when the cover separates from the frame so people will not get hurt.

Abstract: Various embodiments of apparatus and methods are disclosed for the conversion of steam boilers from being oil fired to coal and natural gas fired without adversely affecting the normal power density of the boilers or the emission pollution therefrom. In some cases even the resultant coal ash can be modified by injecting a powdered catalyst or phosphate slimes into the flame to produce a fertilizer ash having desirable minerals to enhance the economic value thereof.Basically all embodiments include a swirling coal-air mixture directed along a path to form a sheath and a swirling gas-air mixture internally thereof with the swirling of the latter being in the same direction and fortifying the motion of the former. A gas-air mixture, swirling or non-swirling, may be supplied outwardly of such sheath to enhance the more complete burning of the coal-air mixture.