|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

LIGHTING; HEATING

|  | F21 |
LIGHTING (electric aspects or elements, see section H, e.g. electric light sources Fulltext... Hierarchy... Expanded...H01J, Fulltext... Hierarchy... Expanded...H01K, Fulltext... Hierarchy... Expanded...H05B)

|  | F21 |
3. Note(s) 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. [7] Attention is drawn to Note III following the Contents of Section of section H. Attention is drawn to the following places: [7]
   Fulltext... Hierarchy... Expanded...A01G 9/20 | Lights for cultivation in receptacles, forcing frames, greenhouses [7] |
   Fulltext... Hierarchy... Expanded...A01K 63/06 | Aquaria [7] |
   Fulltext... Hierarchy... Expanded...A01K 75/02 | Fishing nets [7] |
   Fulltext... Hierarchy... Expanded...A01K 85/01 | Fishing baits [7] |
   Fulltext... Hierarchy... Expanded...A01M 1/04 | Catching insects [7] |
   Fulltext... Hierarchy... Expanded...A21B 3/10 | Baker's ovens [7] |
   Fulltext... Hierarchy... Expanded...A45B 3/02 | Sticks [7] |
   Fulltext... Hierarchy... Expanded...A45C 15/06 | Bags, purses, or the like [7] |
   Fulltext... Hierarchy... Expanded...A45D 33/32 | Toilet or cosmetic powder containers [7] |
   Fulltext... Hierarchy... Expanded...A45D 42/10 | Shaving mirrors [7] |
   Fulltext... Hierarchy... Expanded...A47F 11/10 | Shop windows or showcases [7] |
   Fulltext... Hierarchy... Expanded...A47L 9/30 | Suction cleaners [7] |
   Fulltext... Hierarchy... Expanded...A61B 1/00 | Medical instruments for examining body cavities or tubes [7] |
   Fulltext... Hierarchy... Expanded...A61C 13/15 | Curing dental plastics prostheses by light action [7] |
   Fulltext... Hierarchy... Expanded...A61H 15/02 | Massage adapted for simultaneous treatment with light [7] |
   Fulltext... Hierarchy... Expanded...A61N 5/06 | Radiation therapy [7] |
   Fulltext... Hierarchy... Expanded...A63B 15/02 | Clubs [7] |
   Fulltext... Hierarchy... Expanded...A63B 43/06 | Balls [7] |
   Fulltext... Hierarchy... Expanded...A63C 17/26 | Roller skates or skate boards [7] |
   Fulltext... Hierarchy... Expanded...A63H 1/24 | Tops [7] |
   Fulltext... Hierarchy... Expanded...A63H 17/28 | Toy vehicles [7] |
   Fulltext... Hierarchy... Expanded...A63H 19/20 | Model railways [7] |
   Fulltext... Hierarchy... Expanded...B25B 23/18 | Spanners, wrenches, screwdrivers [7] |
   Fulltext... Hierarchy... Expanded...B26B 19/46 | Hair clippers or dry shavers [7] |
   Fulltext... Hierarchy... Expanded...B26B 21/46 | Accessories for razors [7] |
   Fulltext... Hierarchy... Expanded...B41B 21/08 | Photographic composing machines [7] |
   Fulltext... Hierarchy... Expanded...B41J 29/19 | Typewriters or selective printing machines [7] |
   Fulltext... Hierarchy... Expanded...B43K 29/10 | Writing implements [7] |
   Fulltext... Hierarchy... Expanded...B44D 3/24 | Lamps for baking lacquers used in painting or artistic drawing [7] |
   Fulltext... Hierarchy... Expanded...B60Q | Arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general [7] |
   Fulltext... Hierarchy... Expanded...B61D 29/00 | Railway vehicles [7] |
   Fulltext... Hierarchy... Expanded...B61L 5/18 | Railway light signals [7] |
   Fulltext... Hierarchy... Expanded...B61L 9/00 | Points, form signals, or gates [7] |
   Fulltext... Hierarchy... Expanded...B62J 6/00 | Cycles [7] |
   Fulltext... Hierarchy... Expanded...B63B 45/00 | Ships [7] |
   Fulltext... Hierarchy... Expanded...B63C 9/20 | Life-buoys, life-belts, lifejackets [7] |
   Fulltext... Hierarchy... Expanded...B64D 47/02 | Aircraft [7] |
   Fulltext... Hierarchy... Expanded...B67D 5/66 | Apparatus for transferring liquids [7] |
   Fulltext... Hierarchy... Expanded...D05B 79/00 | Sewing machines [7] |
   Fulltext... Hierarchy... Expanded...E01F 9/016 | Road signs [7] |
   Fulltext... Hierarchy... Expanded...E01F 9/053 | Road surface markings [7] |
   Fulltext... Hierarchy... Expanded...E04H 15/10 | Tents or canopies [7] |
   Fulltext... Hierarchy... Expanded...E05B 17/10 | Locks or keys [7] |
   Fulltext... Hierarchy... Expanded...F24F 3/056 | Air conditioning systems [7] |
   Fulltext... Hierarchy... Expanded...F24F 13/078 | Outlets for directing air into rooms or spaces combined with lighting fixtures [7] |
   Fulltext... Hierarchy... Expanded...F25D 27/00 | Cooling or freezing apparatus [7] |
   Fulltext... Hierarchy... Expanded...F27D 21/02 | Furnaces, kilns, ovens or retorts [7] |
   Fulltext... Hierarchy... Expanded...F41G 1/35 | Night sights [7] |
   Fulltext... Hierarchy... Expanded...G01C 9/32 | Levels [7] |
   Fulltext... Hierarchy... Expanded...G01C 17/24 | Compasses [7] |
   Fulltext... Hierarchy... Expanded...G01D 11/28 | Measuring arrangements [7] |
   Fulltext... Hierarchy... Expanded...G01G 23/30 | Weighing apparatus [7] |
   Fulltext... Hierarchy... Expanded...G01K 1/06 | Thermometers [7] |
   Fulltext... Hierarchy... Expanded...G01P 1/08 | Speedometers [7] |
   Fulltext... Hierarchy... Expanded...G01R 1/08 | Instruments for measuring [7] |
   Fulltext... Hierarchy... Expanded...G02B 21/06 | Microscopes [7] |
   Fulltext... Hierarchy... Expanded...G02B 25/02 | Magnifying glasses [7] |
   Fulltext... Hierarchy... Expanded...G02B 27/20 | Light-pointers [7] |
   Fulltext... Hierarchy... Expanded...G02B 27/34 | Optical instruments [7] |
   Fulltext... Hierarchy... Expanded...G02C 11/04 | Spectacles [7] |
   Fulltext... Hierarchy... Expanded...G02F 1/1335 | Liquid crystals [7] |
   Fulltext... Hierarchy... Expanded...G02F 1/157 | Electrochromic cells [7] |
   Fulltext... Hierarchy... Expanded...G03B 15/02 | Illuminating scene for taking photographs [7] |
   Fulltext... Hierarchy... Expanded...G03B 15/03 | Cameras [7] |
   Fulltext... Hierarchy... Expanded...G03B 27/16 | Contact photographic printing [7] |
   Fulltext... Hierarchy... Expanded...G03B 27/54 | Projection photographic printing [7] |
   Fulltext... Hierarchy... Expanded...G04B 19/30 | Clocks [7] |
   Fulltext... Hierarchy... Expanded...G04C 17/02 | Time indicating by electric lamps [7] |
   Fulltext... Hierarchy... Expanded...G04C 19/02 | Time signalling by electric lamps [7] |
   Fulltext... Hierarchy... Expanded...G08B 5/36 | Visible signalling or calling systems [7] |
   Fulltext... Hierarchy... Expanded...G08B 17/103 | Actuation of fire alarms [7] |
   Fulltext... Hierarchy... Expanded...G08G 1/095 | Traffic lights [7] |
   Fulltext... Hierarchy... Expanded...G09F 13/00 | Illuminated signs [7] |
   Fulltext... Hierarchy... Expanded...G09F 19/22 | Advertising or display means on roads or walls [7] |
   Fulltext... Hierarchy... Expanded...G09F 21/10, |  |
   Fulltext... Hierarchy... Expanded...G09F 21/14 | Aircraft advertising [7] |
   Fulltext... Hierarchy... Expanded...G09F 21/20 | Advertising on ships [7] |
   Fulltext... Hierarchy... Expanded...G09F 23/04 | Illuminated advertising on or in specific articles [7] |
   Fulltext... Hierarchy... Expanded...G12B 11/00 | Indicating elements of instruments [7] |
   Fulltext... Hierarchy... Expanded...H01H 73/14 | Indicating lamps in circuit-breaker switches [7] |
   Fulltext... Hierarchy... Expanded...H01H 85/32 | Indicating lamps in fuses [7] |
   Fulltext... Hierarchy... Expanded...H01Q 1/06 | Lighting of aerials [7] |
   Fulltext... Hierarchy... Expanded...H01R 13/717 | Coupling devices with built-in light bulbs [7] |
   Fulltext... Hierarchy... Expanded...H03K 21/20 | Pulse counter or frequency divider indicators using glow-discharge lamps [7] |
   Fulltext... Hierarchy... Expanded...H04M 1/22 | Illuminating of telephone substation equipment [7] |

|  | F21V |
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR [1,7]

|  | F21V |
Note(s) In this subclass, it is desirable to add the indexing codes of subclasses Fulltext... Hierarchy... Expanded...F21W and Fulltext... Hierarchy... Expanded...F21Y. The indexing codes should be unlinked. [7]

|  | F21V |
Subclass index
DETAILS OF PARTS INVOLVED IN LIGHT EMISSION OR DISTRIBUTION |
Shades; globes; refractors; reflectors | 1/00; 3/00; 5/00; 7/00
Light guides | 8/00
Light filters | 9/00
Other screens | 11/00
Combinations of elements | 13/00
Changing characteristics or distribution of the light | 14/00
DETAILS OF PARTS NOT INVOLVED IN LIGHT EMISSION OR DISTRIBUTION |
Fastening | 17/00; 19/00
Arrangements for supporting or suspending | 21/00
Arrangements of electric circuit elements | 23/00
Cable stowing | 27/00
Protection; safety; cooling; tightness | 15/00; 25/00; 29/00; 31/00
Combinations with other articles | 33/00
Candle holders | 35/00
Arrangements of mantles or burners | 36/00
Details of combustion lighting | 37/00

|  | F21V 1/00 - F21V 14/00 |
Details of those parts involved in light emission or distribution (optical elements or systems in general Fulltext... Hierarchy... Expanded...G02B)

|  | F21V 1/00 |
Shades

|  | F21V 1/02 |
· | Frames

|  | F21V 1/04 |
· · | rigid (Fulltext... Hierarchy... Expanded...F21V 1/08 takes precedence)

|  | F21V 1/06 |
· · | foldable or collapsible

|  | F21V 1/08 |
· · | adjustable

|  | F21V 1/10 |
· | Rotating shades

|  | F21V 1/12 |
· | Composite shades

|  | F21V 1/14 |
· | Covers for frames; Frameless shades

|  | F21V 1/16 |
· · | characterised by the material

|  | F21V 1/18 |
· · · | the material being paper

|  | F21V 1/20 |
· · · | the material being glass

|  | F21V 1/22 |
· · · | the material being plastics

|  | F21V 1/24 |
· · · | the material being metal

|  | F21V 1/26 |
· | Manufacturing shades

|  | F21V 3/00 |
Globes; Bowls; Cover glasses (with refracting properties Fulltext... Hierarchy... Expanded...F21V 5/00; with reflecting properties Fulltext... Hierarchy... Expanded...F21V 7/00)

|  | F21V 3/02 |
· | characterised by the shape

|  | F21V 3/04 |
· | characterised by the material; characterised by surface treatments or coatings

|  | F21V 5/00 |
Refractors

|  | F21V 5/02 |
· | of prismatic shape (Fulltext... Hierarchy... Expanded...F21V 5/04 takes precedence)

|  | F21V 5/04 |
· | of lens shape

|  | F21V 5/06 |
· | Hanging lustres for chandeliers

|  | F21V 5/08 |
· | producing an asymmetric light distribution [1,7]

|  | F21V 7/00 |
Reflectors

|  | F21V 7/02 |
( covered by Fulltext... Hierarchy... Expanded...F21V 7/00 )

|  | F21V 7/04 |
· | Optical design (Fulltext... Hierarchy... Expanded...F21V 7/22 takes precedence) [1,7]

|  | F21V 7/05 |
· · | plane [1,7]

|  | F21V 7/06 |
· · | with parabolic curvature [1,7]

|  | F21V 7/07 |
· · | with hyperbolic curvature [1,7]

|  | F21V 7/08 |
· · | with elliptical curvature [1,7]

|  | F21V 7/09 |
· · | with a combination of different curvatures [1,7]

|  | F21V 7/10 |
· | Construction (Fulltext... Hierarchy... Expanded...F21V 7/22 takes precedence) [1,7]

|  | F21V 7/12 - F21V 7/14 |
( covered by Fulltext... Hierarchy... Expanded...F21V 7/00 )

|  | F21V 7/16 |
· · | with provision for adjusting the curvature [1,7]

|  | F21V 7/18 |
· · | with provision for folding or collapsing [1,7]

|  | F21V 7/20 |
· · | specially adapted for facilitating cooling, e.g. with fins (cooling by other means, e.g. fluid, Fulltext... Hierarchy... Expanded...F21V 29/00) [1,7]

|  | F21V 7/22 |
· | characterised by the material; characterised by surface treatments or coatings

|  | F21V 8/00 |
Use of light guides, e.g. fibre optic devices, in lighting devices or systems (light guides per se, structural details of arrangements with other optical elements Fulltext... Hierarchy... Expanded...G02B 6/00) [4]

|  | F21V 9/00 |
Light filters (coloured shades Fulltext... Hierarchy... Expanded...F21V 1/00); Selection of luminescent materials for light screens (luminescent materials per se Fulltext... Hierarchy... Expanded...C09K 11/00; electroluminescent light sources Fulltext... Hierarchy... Expanded...H05B 33/00)

|  | F21V 9/02 |
· | for simulating daylight (Fulltext... Hierarchy... Expanded...F21V 9/04, Fulltext... Hierarchy... Expanded...F21V 9/06, Fulltext... Hierarchy... Expanded...F21V 9/16 take precedence)

|  | F21V 9/04 |
· | for filtering out infra-red radiation (using liquid-filled chambers Fulltext... Hierarchy... Expanded...F21V 9/12)

|  | F21V 9/06 |
· | for filtering out ultra-violet radiation (Fulltext... Hierarchy... Expanded...F21V 9/16 takes precedence)

|  | F21V 9/08 |
· | for producing coloured light, e.g. monochromatic; for reducing intensity of light (Fulltext... Hierarchy... Expanded...F21V 9/16 takes precedence)

|  | F21V 9/10 |
· · | with provision for variation of the colour or intensity (Fulltext... Hierarchy... Expanded...F21V 9/12 takes precedence)

|  | F21V 9/12 |
· · | with liquid-filled chambers

|  | F21V 9/14 |
· | for producing polarised light

|  | F21V 9/16 |
· | Selection of luminescent materials for light screens

|  | F21V 11/00 |
Screens not covered by groups Fulltext... Hierarchy... Expanded...F21V 1/00, Fulltext... Hierarchy... Expanded...F21V 3/00, Fulltext... Hierarchy... Expanded...F21V 7/00, Fulltext... Hierarchy... Expanded...F21V 9/00

|  | F21V 11/02 |
· | using parallel laminae or strips, e.g. of Venetian-blind type (Fulltext... Hierarchy... Expanded...F21V 11/06 takes precedence)

|  | F21V 11/04 |
· · | adjustable

|  | F21V 11/06 |
· | using crossed laminae or strips; using lattices or honeycombs

|  | F21V 11/08 |
· | using diaphragms containing one or more apertures

|  | F21V 11/10 |
· · | of iris type

|  | F21V 11/12 |
· · | of slot type

|  | F21V 11/14 |
· · | with many small apertures

|  | F21V 11/16 |
· | using sheets without apertures, e.g. fixed (Fulltext... Hierarchy... Expanded...F21V 11/02, Fulltext... Hierarchy... Expanded...F21V 11/06 take precedence)

|  | F21V 11/18 |
· · | movable, e.g. flaps, slides

|  | F21V 13/00 |
Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F21V 1/00-F21V 11/00 (by means of a combination of two or more elements covered by a single one of main groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F21V 1/00-F21V 11/00, see the relevant group; changing the characteristics or distribution of the light emitted by adjustment of parts Fulltext... Hierarchy... Expanded...F21V 14/00) [1,7]

|  | F21V 13/02 |
· | Combinations of only two kinds of elements

|  | F21V 13/04 |
· · | the elements being reflectors and refractors

|  | F21V 13/06 |
· · · | a reflector being rotatable

|  | F21V 13/08 |
· · | the elements being reflectors and filters

|  | F21V 13/10 |
· · | the elements being reflectors and screens

|  | F21V 13/12 |
· | Combinations of only three kinds of elements

|  | F21V 13/14 |
· · | the elements being reflectors, refractors, and filters

|  | F21V 14/00 |
Changing the characteristics or distribution of the light emitted by adjustment of parts (reflectors with provision for adjusting the curvature Fulltext... Hierarchy... Expanded...F21V 7/16; light filters with provision for variation of colour or intensity Fulltext... Hierarchy... Expanded...F21V 9/10; screens using iris-type diaphragms Fulltext... Hierarchy... Expanded...F21V 11/10; adjustable mountings for lighting devices Fulltext... Hierarchy... Expanded...F21V 21/14) [7]

|  | F21V 14/02 |
· | by movement of light sources [7]

|  | F21V 14/04 |
· | by movement of reflectors [7]

|  | F21V 14/06 |
· | by movement of refractors [7]

|  | F21V 14/08 |
· | by movement of screens [7]

|  | F21V 15/00 - F21V 37/00 |
Details of those parts not involved in light emission or distribution, e.g. fittings

|  | F21V 15/00 |
Protecting lighting devices from damage (cooling or heating arrangements Fulltext... Hierarchy... Expanded...F21V 29/00; gas-tight or water-tight arrangements Fulltext... Hierarchy... Expanded...F21V 31/00)

|  | F21V 15/01 |
· | Housings, e.g. material or assembling of housing parts (Fulltext... Hierarchy... Expanded...F21V 15/02 takes precedence) [7]

|  | F21V 15/015 |
· · | Devices for covering joints between adjacent lighting devices; End coverings [7]

|  | F21V 15/02 |
· | Cages

|  | F21V 15/04 |
· | Resilient mountings, e.g. shock-absorbers (in general Fulltext... Hierarchy... Expanded...F16F 15/04)

|  | F21V 15/06 |
· | Thermal insulation [7]

|  | F21V 17/00 |
Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages (of light sources or light holders Fulltext... Hierarchy... Expanded...F21V 19/00; gas-tight or water-tight arrangements Fulltext... Hierarchy... Expanded...F21V 31/00)

|  | F21V 17/02 |
· | with provision for adjustment (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F21V 17/04-F21V 17/08 take precedence; changing the characteristics or distribution of the light emitted by adjustment of parts Fulltext... Hierarchy... Expanded...F21V 14/00) [1,7]

|  | F21V 17/04 |
· | onto or by the light source

|  | F21V 17/06 |
· | onto or by the lamp holder

|  | F21V 17/08 |
· | onto the supporting or suspending arrangements of the lighting device, e.g. power cords, standards [7]

|  | F21V 17/10 |
· | characterised by specific fastening means or way of fastening (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F21V 17/02-F21V 17/08 take precedence) [7]

|  | F21V 17/12 |
· · | by screwing [7]

|  | F21V 17/14 |
· · | Bayonet-type fastening [7]

|  | F21V 17/16 |
· · | by deformation of parts of the lighting device; Snap action mounting [7]

|  | F21V 17/18 |
· · | Latch-type fastening, e.g. with rotary action [7]

|  | F21V 17/20 |
· · | by toggle-action levers [7]

|  | F21V 19/00 |
Fastening of light sources or lamp holders (fastening electric light source solely by the coupling device Fulltext... Hierarchy... Expanded...H01R 33/00)

|  | F21V 19/02 |
· | with provision for adjustment, e.g. for focusing (changing the characteristics or distribution of the light emitted by adjustment of parts Fulltext... Hierarchy... Expanded...F21V 14/00) [1,7]

|  | F21V 19/04 |
· | with provision for changing light source, e.g. turret

|  | F21V 19/06 |
· | Fastening incandescent mantles or other incandescent bodies to lamp parts; Suspension devices for incandescent mantles or other incandescent bodies [1,7]

|  | F21V 21/00 |
Supporting, suspending, or attaching arrangements for lighting devices (Fulltext... Hierarchy... Expanded...F21V 17/00, Fulltext... Hierarchy... Expanded...F21V 19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general Fulltext... Hierarchy... Expanded...B60Q; stands for supporting apparatus or articles in general Fulltext... Hierarchy... Expanded...F16M 11/00); Hand grips [1,7]

|  | F21V 21/002 |
· | making direct electrical contact, e.g. by piercing (Fulltext... Hierarchy... Expanded...F21V 21/35 takes precedence) [7]

|  | F21V 21/005 |
· | for several lighting devices in an end-to-end arrangement, i.e. light tracks [7]

|  | F21V 21/008 |
· | Suspending from a cable or suspension line [7]

|  | F21V 21/02 |
· | Wall, ceiling, or floor bases; Fixing pendants or arms to the bases (Fulltext... Hierarchy... Expanded...F21V 21/08 takes precedence; bases for movable standing lamps Fulltext... Hierarchy... Expanded...F21V 21/06)

|  | F21V 21/03 |
· · | Ceiling bases, e.g. ceiling roses (Fulltext... Hierarchy... Expanded...F21V 21/04 takes precedence) [7]

|  | F21V 21/04 |
· · | Recessed bases

|  | F21V 21/06 |
· | Bases for movable standing lamps; Fixing standards to the bases (Fulltext... Hierarchy... Expanded...F21V 21/08 takes precedence)

|  | F21V 21/08 |
· | Devices for easy attachment to a desired place

|  | F21V 21/084 |
· · | Head fittings (for medical purposes Fulltext... Hierarchy... Expanded...A61B 1/06) [7]

|  | F21V 21/088 |
· · | Clips; Clamps [7]

|  | F21V 21/092 |
· · | Suction devices [7]

|  | F21V 21/096 |
· · | Magnetic devices [7]

|  | F21V 21/10 |
· | Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards (adjustable mounting Fulltext... Hierarchy... Expanded...F21V 21/14; construction of posts not peculiar to use with lighting devices Fulltext... Hierarchy... Expanded...E04H 12/00)

|  | F21V 21/104 |
· · | Pendants [7]

|  | F21V 21/108 |
· · | Arms [7]

|  | F21V 21/112 |
· · | Fixing lighting devices to pendants (Fulltext... Hierarchy... Expanded...F21V 21/002 takes precedence) [7]

|  | F21V 21/116 |
· · | Fixing lighting devices to arms or standards (Fulltext... Hierarchy... Expanded...F21V 21/002 takes precedence) [7]

|  | F21V 21/12 |
· · | capable of being elongated or shortened by the insertion or removal of intermediate pieces

|  | F21V 21/13 |
· | Spring-loaded poles fixed at both ends [7]

|  | F21V 21/14 |
· | Adjustable mountings

|  | F21V 21/15 |
· · | specially adapted for power operation, e.g. by remote control [7]

|  | F21V 21/16 |
· · | using wires or cords

|  | F21V 21/18 |
· · · | operated by springs

|  | F21V 21/20 |
· · · | operated by weights

|  | F21V 21/22 |
· · | telescopic

|  | F21V 21/24 |
· · | Lazy-tongs

|  | F21V 21/26 |
· · | Pivoted arms

|  | F21V 21/28 |
· · · | adjustable in more than one plane

|  | F21V 21/29 |
· · · · | employing universal joints

|  | F21V 21/30 |
· · | Pivoted housings or frames

|  | F21V 21/32 |
· · | Flexible tubes

|  | F21V 21/34 |
· | Supporting elements displaceable along a guiding element

|  | F21V 21/35 |
· · | with direct electrical contact between the supporting element and electric conductors running along the guiding element [7]

|  | F21V 21/36 |
· | Hoisting or lowering devices, e.g. for maintenance (Fulltext... Hierarchy... Expanded...F21V 21/14 takes precedence)

|  | F21V 21/38 |
· · | with a cable

|  | F21V 21/40 |
· | Hand grips [7]

|  | F21V 23/00 |
Arrangement of electric circuit elements in or on lighting devices (electric circuits per se Fulltext... Hierarchy... Expanded...H05B 39/00)

|  | F21V 23/02 |
· | the elements being transformers or impedances

|  | F21V 23/04 |
· | the elements being switches (safety devices Fulltext... Hierarchy... Expanded...F21V 25/00)

|  | F21V 23/06 |
· | the elements being coupling devices

|  | F21V 25/00 |
Safety devices structurally associated with lighting devices (gas-tight or water-tight arrangements Fulltext... Hierarchy... Expanded...F21V 31/00; in general Fulltext... Hierarchy... Expanded...F16P; protective circuit arrangements per se Fulltext... Hierarchy... Expanded...H02H 7/00)

|  | F21V 25/02 |
· | coming into action when lighting device is disturbed, dismounted, or broken

|  | F21V 25/04 |
· · | breaking the electric circuit

|  | F21V 25/06 |
· · | feeding a quenching fluid to the light source

|  | F21V 25/08 |
· · | cutting the incandescent filament

|  | F21V 25/10 |
· | coming into action when lighting device is over-loaded, e.g. thermal switch

|  | F21V 25/12 |
· | Flameproof or explosion-proof arrangements

|  | F21V 27/00 |
Cable-stowing arrangements structurally associated with lighting devices, e.g. reels (storing lengths of cable in general Fulltext... Hierarchy... Expanded...B65H)

|  | F21V 27/02 |
· | Cable inlets [7]

|  | F21V 29/00 |
Cooling or heating arrangements (air-treatment systems with air-flow over lighting fixtures Fulltext... Hierarchy... Expanded...F24F 3/056; lighting fixtures combined with outlets for air-treatment systems Fulltext... Hierarchy... Expanded...F24F 13/078) [1,7]

|  | F21V 29/02 |
· | Cooling by forcing air over or around the light source (cooling arrangements structurally associated with electric lamps Fulltext... Hierarchy... Expanded...H01J 61/52, Fulltext... Hierarchy... Expanded...H01K 1/58) [7]

|  | F21V 31/00 |
Gas-tight or water-tight arrangements

|  | F21V 31/02 |
( covered by Fulltext... Hierarchy... Expanded...F21V 31/00 )

|  | F21V 31/03 |
· | with provision for venting [7]

|  | F21V 31/04 |
· | Provision of filling media (safety devices Fulltext... Hierarchy... Expanded...F21V 25/00; cooling arrangements Fulltext... Hierarchy... Expanded...F21V 29/00)

|  | F21V 33/00 |
Structural combinations of lighting devices with other articles, not otherwise provided for [1,7]

|  | F21V 33/00 |
Note(s) Attention is drawn to Note (3) following the title of class Fulltext... Hierarchy... Expanded...F21. [7]

|  | F21V 35/00 |
Candle holders

|  | F21V 36/00 |
Arrangements of mantles or other incandescent bodies on burners (attaching to lamp parts Fulltext... Hierarchy... Expanded...F21V 19/06)

|  | F21V 36/02 |
· | in ceiling lamps

|  | F21V 37/00 |
Details of lighting devices employing combustion as light source, not otherwise provided for [1,7]

|  | F21V 37/02 |
· | Special adaptation for protection against draughts [7]