MACHINES positive displacement rotary or oscillating piston liquid and elastic fluid or elastic fluid liquid only reciprocating piston or other liquid and elastic fluid or elastic fluid liquid only non-positive displacement liquid and elastic fluid or elastic fluid liquid only ENGINES positive displacement rotary or oscillating piston liquid and elastic fluid or elastic fluid liquid only reciprocating piston or other liquid and elastic fluid or elastic fluid liquid only non-positive displacement liquid and elastic fluid or elastic fluid liquid only PUMPS positive displacement rotary or oscillating piston reciprocating piston or other non-positive displacement If the disclosure gives no indication as to whether it relates to electrical means or not, it should be classified as if it were in fact electric. Attention is drawn to Note III following the Contents of Section of section H. Attention is drawn to the following places: Lights for cultivation in receptacles, forcing frames, greenhouses Aquaria Fishing nets Fishing baits Catching insects Baker's ovens Sticks Bags, purses, or the like Toilet or cosmetic powder containers Shaving mirrors Shop windows or showcases Suction cleaners Medical instruments for examining body cavities or tubes Curing dental plastics prostheses by light action Massage adapted for simultaneous treatment with light Radiation therapy Clubs Balls Roller skates or skate boards Tops Toy vehicles Model railways Spanners, wrenches, screwdrivers Hair clippers or dry shavers Accessories for razors Photographic composing machines Typewriters or selective printing machines Writing implements Lamps for baking lacquers used in painting or artistic drawing Arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general Railway vehicles Railway light signals Points, form signals, or gates Cycles Ships Life-buoys, life-belts, lifejackets Aircraft Apparatus for transferring liquids Sewing machines Road signs Road surface markings Tents or canopies Locks or keys Air conditioning systems Outlets for directing air into rooms or spaces combined with lighting fixtures Cooling or freezing apparatus Furnaces, kilns, ovens or retorts Night sights Levels Compasses Measuring arrangements Weighing apparatus Thermometers Speedometers Instruments for measuring Microscopes Magnifying glasses Light-pointers Optical instruments Spectacles Liquid crystals Electrochromic cells Illuminating scene for taking photographs Cameras Contact photographic printing Projection photographic printing Clocks Time indicating by electric lamps Time signalling by electric lamps Visible signalling or calling systems Actuation of fire alarms Traffic lights Illuminated signs Advertising or display means on roads or walls , Aircraft advertising Advertising on ships Illuminated advertising on or in specific articles Indicating elements of instruments Indicating lamps in circuit-breaker switches Indicating lamps in fuses Lighting of aerials Coupling devices with built-in light bulbs Pulse counter or frequency divider indicators using glow-discharge lamps Illuminating of telephone substation equipment This subclass constitutes an indexing scheme associated with subclasses , and , relating to the form of the light sources.