Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V25/00—Safety devices structurally associated with lighting devices
  • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
  • F21V25/04—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken breaking the electric circuit
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
  • F21V21/36—Hoisting or lowering devices, e.g. for maintenance
  • F21V21/38—Hoisting or lowering devices, e.g. for maintenance with a cable

Definitions

• the present invention relates to ceiling lighting apparatuses, and in particular to a lowerable ceiling light provided with a safety device.
• a conventional ceiling light consists of a base secured to the ceiling on which there is mounted at least one lamp-holder as well as a protective glass or the like. Since ceiling lights are generally used for the lighting of high- ceiling premises such as the entrance halls of residential buildings, public offices, hotels and so on, there is often the problem of reaching the ceiling lights to cany out their cleaning and/or maintenance (e.g. replacing a blown bulb).
• the object of the present invention is to provide a ceiling light which overcomes the above-mentioned drawbacks.
• the fundamental advantage of the ceiling light according to the present invention is that of allowing cleaning and/or maintenance operations with total safety for the user, without requiring the use of ladders and with the same easiness wherever the ceiling light is located.
• Another advantage of this ceiling light is that said results are achieved by means of a structure which is simpler, smaller and cheaper with respect to a conventional lowerable pendant.
• the present ceiling light includes a conventional base B to be secured to the ceiling, where the supply wires A from the electric network arrive.
• a first novel aspect of the present ceiling light is given by the presence of the mobile disk M on which there is mounted at least one lamp-holder P, for a relevant bulb L, as well as a protective glass or the like (not illustrated).
• the disk M is connected to the base B through a pair of supporting cables F
• disk M can be moved away from base B lowering it to man's level for the operations required.
• the keeping of the lowered position can be achieved either by using a frictioned winding device or by providing locking means for the winding device (e.g. pin, clamp or the like) to prevent the immediate reascending of disk M under the action of spring U.
• a second novel aspect of the ceiling light according to the invention is the presence of a safety device which provides to cut off the electrical connection as soon as the mobile disk M stalls to move away from base B.
• said device takes the form of electrical connectors made up of a first fixed member C mounted on base B and a second mobile member C mounted on disk M at a corresponding position.
• These members C, C have a substantially frustoconical mating shape so as to achieve a self- centering coupling with respective central electrical contacts E, E'.
• the current may reach bulb L only when connector C fits into connector C so as to achieve contact between E and E', whereas as soon as the descent of disk M begins said contact is interrupted thus achieving the electrical insulation of the mobile portion of the ceiling light on which the user operates.
• the supply wires A rather than arriving at connectors C may be connected to the entrances of one or more terminal boxes provided with a mechanism for cutting off the electrical connection which is controlled by a microswitch.
• the connection is maintained as long as the microswitch is kept pressed by disk M (or by any member mounted thereon).
• connectors C, C and a microswitch could be combined to allow the flow of current to the connectors only when disk M has reached the operating position, so as to prevent the onset of an electric arc between contacts E and E'.
• the above-described and illustrated embodiment of the ceiling light according to the invention is just an example susceptible of various modifications.
• the lowering function can be achieved by arranging the winding devices N on base B or partly on the latter and partly on disk M, and the cables F may be more than two for greater stability of disk M.
• the winding devices may be of a type different from that illustrated (e.g. with horizontal axis) and they may be motor-driven to further facilitate the operations for lowering and raising the mobile portion of the ceiling light.
• the electric motors driving the winding devices are controlled through a remote control either by wire or tlirough a wireless device (e.g. through radio or infrared waves).
• disk M could also easily act as an "interface" to provide an existing conventional ceiling light with the advantages of the present invention.
• the existing ceiling light rather than being secured to the ceiling could be secured to disk M which obviously should have a lower surface without the lamp-holder L and the protective glass.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=11443906

Family Applications (1)

Country Status (3)

Cited By (2)

Family Cites Families (5)

• 2000
  • 2000-02-04 IT IT2000MI000186A patent/IT1316347B1/it active
• 2001
  • 2001-01-30 WO PCT/IT2001/000044 patent/WO2001057432A2/en active Application Filing
  • 2001-01-30 AU AU37711/01A patent/AU3771101A/en not_active Abandoned

Non-Patent Citations (1)

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