Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes, namely, pocket flashlights; gas igniters for gas ovens; chimney flues and installations for conveying exhaust gases, namely, exhaust hoods for kitchens, ventilating exhaust fans; sun tanning appliances, namely, tanning beds, tanning booths; sanitary installations, namely, steam rooms; water supply and sanitation equipment, namely, urinals, metered valves; oil and gas burners for industrial, commercial and domestic use; heating boilers; lighting reflectors; food and beverage cooking, heating, cooling and treatment equipment, namely, refrigerators, microwave ovens, electric cooking ovens; fireplaces; air and water filters for industrial and household use; industrial treatment installations, namely, gas cleaners and purifiers; chemical processing equipment, namely, distillers, evaporators and recuperators; industrial installations for filtering liquids, namely, water filtering apparatus; installations for the collection of gases, namely, gas scrubbers, separators for the cleaning and purification of gases; installations for the collection of liquids, namely, marine sewage holding tanks; launders for trapping impurities in molten metal; biological fermentation reactors for clarifying industrial effluents, namely, percolating fermenters and dry fermenters; apparatus for dehydrating food waste; drying installations, namely, clothes drying machines, drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; refrigerating and freezing machines; regulating and safety accessories for water and gas installations, namely, pressure regulators; nuclear installations, namely, nuclear reactors, nuclear generators; ambient heating, ventilating and air conditioning and purification equipment, namely, electric space heaters, air conditioners; lighting apparatus, namely, lighting installations; lamps; light-emitting diodes (LED) lighting apparatus for vehicles; lighting installations for air vehicles; lighting apparatus for vehicles; light bulbs for directional signals for vehicles; anti-glare devices specially adapted for lights for vehicles; anti-dazzle devices specially adapted for lights for automobiles; electric torches for lighting; arc lamps; electric coffee machines; electric fans for personal use; electric discharge tubes for lighting; bicycle lights; vehicle lights and structural parts therefor; vehicle reflectors and structural parts therefor; vehicle headlights, and structural parts therefor; sockets for electric lights; friction lighters for igniting gas; light bulbs; electric light bulbs; incandescent burners for lamps; filaments for electric lamps; miners' lamps; space heating apparatus for solid, liquid or gaseous fuels; electric heating apparatus, namely, electric space heaters, electric heaters for babies' bottles ; heating installations; heaters for vehicles; air conditioning installations; air conditioning apparatus; refrigerators; air conditioners for vehicles; electric lamps; gas lamps; lamp glasses; lamp mantles; lamp globes; lamp chimneys; lamp shades; lampshade holders; luminous tubes for lighting; discharge tubes, electric, for lighting; light diffusers; space heating apparatus, namely, air reheaters; filters for air conditioning; air filtering installations; deodorising apparatus, not for personal use, namely, electric air deodorizers; defrosters for vehicles; vehicle climate-control system for ventilation and air-conditioning; heating apparatus for defrosting windows of vehicles; air cooling apparatus; air purifying apparatus and machines; germicidal lamps for purifying air; spa baths in the nature of heated pools; air sterilizers; air driers, namely, dryers for the removal of water vapor from compressed air, portable electric warm air dryers, dehumidifiers; air-conditioning and ventilation instruments and apparatus; lamp reflectors; safety lamps; solar collectors for heating; pocket torches, electric, for lighting; ultraviolet ray lamps, not for medical purposes; solar energy water heaters; radiators, electric