EP0152243A2 - Steuerstangen für Leuchten - Google Patents

Steuerstangen für Leuchten Download PDF

Info

Publication number
EP0152243A2
EP0152243A2 EP85300691A EP85300691A EP0152243A2 EP 0152243 A2 EP0152243 A2 EP 0152243A2 EP 85300691 A EP85300691 A EP 85300691A EP 85300691 A EP85300691 A EP 85300691A EP 0152243 A2 EP0152243 A2 EP 0152243A2
Authority
EP
European Patent Office
Prior art keywords
pole
luminaire
end fitting
fitting
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85300691A
Other languages
English (en)
French (fr)
Other versions
EP0152243B1 (de
EP0152243A3 (en
Inventor
Joseph Thornley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rank Organization Ltd
Original Assignee
Rank Organization Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rank Organization Ltd filed Critical Rank Organization Ltd
Publication of EP0152243A2 publication Critical patent/EP0152243A2/de
Publication of EP0152243A3 publication Critical patent/EP0152243A3/en
Application granted granted Critical
Publication of EP0152243B1 publication Critical patent/EP0152243B1/de
Expired legal-status Critical Current

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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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
    • F21V21/096—Magnetic devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Definitions

  • This invention relates to the pole operation of luminaires, i.e. light fittings which are usually mounted at a high level for providing illumination of a scene, typically in a television or cinematograph studio.
  • luminaires i.e. light fittings which are usually mounted at a high level for providing illumination of a scene, typically in a television or cinematograph studio.
  • Such light fittings include floodlights and various kinds of spotlight, and are often provided with so-called barn doors for modifyina the beam pattern.
  • remote control poles As a luminaire is often mounted at high level, sometimes a very high level, so called remote control poles have been produced to enable remote adjustment of the luminaire, i.e. from the floor or ground, in respect of pan (rotation), tilt, and focus, on/off switching and intensity selection, and also barn door movement.
  • One known pole operator has a pole end fitting in the form of a hook which can be engaged with a bent wire on a fitting which attaches to the drive shaft to the luminaire.
  • Another known pole operator has a pole end fitting in the form of a bayonet cup which enaages a spigot and crossbar on the luminaire.
  • a third known pole operator has a hooked end fittinq on the pole which can be engaged 'with a crossbar spanning a bell-shaped fittinq which attaches to the luminaire drive shaft.
  • a pole for remote adjustment of the luminaire has an end fitting of magnetic or magnetisable material which is engaged in driving connection with a fitting of magnetically susceptible material attached to the drive shaft to the luminaire; the pole end fitting being demagnetised prior to dis- enga q ement.
  • a pole operator for a luminaire comprises a pole and an end fitting thereon which is of magnetic or maanetisable material.
  • a luminaire and pole operator combination comprises:
  • the two fittings are preferably male and female fittings which are correspondingly cone shaped.
  • the end fitting on the pole is preferably an electromagnet, but may be a permanent magnet having an associated demagnetising coil.
  • the pole end fitting is carried by a tiltable pole head. This enables ready adjustment of the luminaire by means of the pole operator even when access to the floor or ground beneath the luminaire is restricted, so that pole operation has to be carried out with the pole at an angle to the vertical.
  • the pole end fitting is carried by the tiltable pole head, the latter having an outer part rotationally mounted on a rotationally fixed inner part, and the end fitting is carried by the outer part.
  • This end fitting has a magnetic coil (electromagnet coil or demagnetising coil) fixedly associated therewith, and the coil is powered through brushes and slip rings, whilst the pole is hollow to accommodate a power line which connects to the coil through said brushes and slip rings.
  • the hollow pole can also accommodate a flexible mechanical drive to the rotary outer part ot the tiltable pole head and also, when the pole head is tiltable on a spring support, accommodate a tensioning wire for tilting the head against the restoring force of the spring.
  • the luminaire drive shaft fitting may also have a crosspiece for engagement by an alternative pole driver having a hooked end fitting.
  • the electromagnet can be switched on as the magnetic cup approaches the luminaire spigot, and thereby become self engaging without the problem of trying to engage a hook on to a small crossbar at long range.
  • the luminaire is often set swinging on its mounting and is difficult to focus and set.
  • the act of disengagement often disturbs the luminaire whereas, with the pole operator of the invention, the act of switching off the magnet readily enables disengagement without disturbance.
  • the same method can be equally carried out using a permanent magnet and associated buck coil for demagnet- isation.
  • the pole operator shown in Figure 1 comprises a pole 10 havina a head, generally referenced 12, tiltable relative to the main portion of the pole on a spring support 14.
  • the pole head 12 comprises a hollow inner part 16, generally of cylindrical form, about which can rotate an outer part 18, also generally of cylindrical form.
  • the references 20 denote bush bearings providing the rotary mounting for the outer part 18 of the head.
  • This outer part 18 is integrally formed at its outer (upper) end as a conical cup-shaped female fitting 22 of magnetic material, associated with a coil 24.
  • This cup/coil combination 22, 24 constitutes an electromagnet.
  • Power for the magnet is supplied from a power line 26 via brushes and slip rings 28, and it can be seen that the pole 10 is hollow to accommodate not only the power line but also a flexible sheathed cable drive 29 by means of which the cone drive 22 can be driven in rotation by a remote motor, and a tensioning wire 30 enabling the head 12 to be tiled to a required angle by pulling on the wire at the base of the pole.
  • a motor drive unit within the pole, either mains or battery operated and controllable by push buttons at the base of the pole.
  • a sinale such motor drive unit could be operable to power all mechanical movements associated with adjustment of the luminaire, as compared to the three luminaire motors which are conventionally employed.
  • the pole In use, the pole is approached to the luminaire and the magnetic cone drive is switched on.
  • the cone drive fitting 22 is thus substantially self engaging to a matching cone shaped male fitting 40 attached to the drive shaft 42 to the luminaire (see Figure 2).
  • pan, tilt and focus adjustment may be carried out through the conventionally provided aear mechanism in the luminaire or alternatively, when a motor drive unit is provided on the hollow pole, by selective operation of push buttons at the base of the pole.
  • Remote switchincr and intensity selection can also be carried out, whilst the barn door flaps at the front of the luminaire can be moved by utilising the magnetic attractive force produced by the switched on cone drive fitting 22 when it is approached towards said flaps.
  • This method of operation only requires that the complementary cone-shaped fitting 40 on the luminaire should be of magnetically susceptible material, and likewise the barn doors, as would in any event normally be the case for such components or otherwise may have ferrous tabs applied.
  • the magnetic fitting Prior to disengaging the cone drive fitting 22 from the luminaire (or moving it away from the barn doors), the magnetic fitting is switched off or is demagnetised, thereby to enable ready detachment without disturbance of the adjusted luminaire (or barn doors).
  • the luminaire fitting 40 is also provided with a crossbar 44 enabling alternative operation and adjustment of the luminaire by a conventional hooked pole operator.
  • tiltable head 12 which is conveniently about 30 cm long and by means of the tensioning wire 30 can be bent over to enable the drive to be effected with the pole at an angle to the vertical. This is important because more often than not the floor or ground directly beneath a luminaire is obstructed.
  • the electrical and mechanical connection lines within the hollow pole have minimal effect on such tilting head movement and are minimally affected by such movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP85300691A 1984-02-03 1985-02-01 Steuerstangen für Leuchten Expired EP0152243B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8402971 1984-02-03
GB848402971A GB8402971D0 (en) 1984-02-03 1984-02-03 Pole operation of luminaires

Publications (3)

Publication Number Publication Date
EP0152243A2 true EP0152243A2 (de) 1985-08-21
EP0152243A3 EP0152243A3 (en) 1985-09-18
EP0152243B1 EP0152243B1 (de) 1987-11-25

Family

ID=10556074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85300691A Expired EP0152243B1 (de) 1984-02-03 1985-02-01 Steuerstangen für Leuchten

Country Status (3)

Country Link
EP (1) EP0152243B1 (de)
DE (1) DE3561081D1 (de)
GB (1) GB8402971D0 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109185748B (zh) * 2018-09-10 2021-01-19 山东赛纳石油科技有限公司 一种方便快速插拔智能led灯具

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773975A (en) * 1948-03-19 1956-12-11 Thompson Electric Company Motor driven lamp hanger
GB981625A (en) * 1962-07-26 1965-01-27 Mole Richardson England Ltd Improved television and film studio lamp

Also Published As

Publication number Publication date
EP0152243B1 (de) 1987-11-25
GB8402971D0 (en) 1984-03-07
DE3561081D1 (en) 1988-01-07
EP0152243A3 (en) 1985-09-18

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