US3892960A - Light projector fittings - Google Patents

Light projector fittings Download PDF

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Publication number
US3892960A
US3892960A US457404A US45740474A US3892960A US 3892960 A US3892960 A US 3892960A US 457404 A US457404 A US 457404A US 45740474 A US45740474 A US 45740474A US 3892960 A US3892960 A US 3892960A
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US
United States
Prior art keywords
reflector
reflectors
fittings
housing
mounting
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.)
Expired - Lifetime
Application number
US457404A
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English (en)
Inventor
Robert Heritage
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.)
Rotaflex Great Britain Ltd
Rotaflex Ltd
Original Assignee
Rotaflex 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 Rotaflex Ltd filed Critical Rotaflex Ltd
Application granted granted Critical
Publication of US3892960A publication Critical patent/US3892960A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • 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
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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

  • ABSTRACT A modular light fitting system is based on a common lamp housing having an elliptical reflector and a parabolic reflector removably mounted in front of the elliptical reflector. Extension rods may be releasably secured to the housing to mount an interchangeable range of supplementary fittings such as a barn-door fitting for use with the parabolic reflector and a fram ing projector unit, colour change unit and lenses for use with the elliptical reflector,
  • Some light fittings require a parabolic reflector and others an elliptical reflector.
  • a simple spot-light on a barn-door" fitting both require the lamp housing to be fitted with a parabolic reflector.
  • Elliptical reflectors are required, for use with for example, a lens and framing unit or pattern changing unit.
  • the present invention provides a light fitting comprising a housing having an elliptical reflector and which is adapted for attachment to the housing of interchangeable supplementary fittings, in a manner known in itself, and is characterised by the fact that the housing is provided additionally with a parabolic reflector, at least one of the two reflectors being removable from the housing.
  • one reflector usually the parabolic reflector, is removably mounted in front of and shielding the elliptical reflector, which may therefore be left permanently in position on the lamp housing.
  • extension rods for secure attachment to the lamp housing, the rods extending forwardly of the housing, parallel with the optical axis of the reflectors, for mounting supplementary fitting in front of the said reflectors.
  • FIGS. 1 and 2 are an axial section and front view of a basic lamp housing unit
  • FIGS. 3 to 6 are perspective views showing some different possible combinations of units added to the basic lamp housing unit.
  • the basic lamp housing L shown in FIGS. 1 and 2 comprises a body 1 having a lamp-holder 2 for a lamp 3, an elliptical reflector 4, a parabolic reflector and a rear cover plate 6.
  • the body is circular in crosssection and has four equispaced axially-bored lugs 7, for receiving fixing bolts, studs or rods, two diametrically opposed lugs receiving studs 8 for locating and receiving the reflectors in position with the aid of nuts 9.
  • the housing is shown with the parabolic reflector 5 in operative position shielding the elliptical reflector, and thus constitutes a simple spotlight fitting.
  • the parabolic reflector is, however, detachable to render the elliptical reflector operative.
  • a step-down transformer is required and this may be positioned remote from the housing and connected to the lamp holder by flex, but is preferably mounted immediately behind the lamp housing as shown in FIG. 3, in which the lamp housing L and transformer T are mounted together on a stirrup-like support bracket l0.
  • FIG. 4 shows the units T and L, still with the parabolic reflector 5 operative, supplemented by a barndoor fitting B having hinged plates ll, with nonreflecting surfaces.
  • FIG. 5 shows a framing projector variant, in which the units T and L now with the parabolic reflector removed, are supplemented by a framing unit F and a holder 1-! for a lens. Further holders H may be added, e.g. for a colour filter and a fresnel lens.
  • the framing unit F is here shown with an adjustable plate framing assembly but an alternative unit has an iris diaphragm for forming circular beams of variable diameter. Another variant is shown in FIG.
  • a motorised effects unit E is mounted in front of the unit L, together with an effects cassette C, rotary colour wheel W and again, a holder H with a projection lens.
  • the lamp-housing may conveniently be secured to the transformer by means of double-ended nuts or spacers, which are screwed onto threaded rearward extensions of the studs 8, and also onto threaded forward extensions of similar studs on the transformer body.
  • the units E and F are preferably mounted on the lamp-housing by means of extension rods 12 which are fast with the units and project to the front and the rear thereof.
  • the rearward extensions pass through the spare lugs 7 on the lamp-housing (i.e.. those lugs not occupied by the studs 8.)
  • the upper of the two rods is extended rearwardly further than the other and has at its rear end a circlip 15 which prevents its inadvertent withdrawal through the lug 7.
  • the units can be releasably locked in their normal, operative positions, for example by means of a screw extending through a threaded hole in the lower rod 12 to bear at its inner end against the inner surface of the groove in the respective lug 7.
  • the forward extensions of rods 12 provide a mounting for the holders H, which can be secured by screws 13.
  • the barndoor unit B needs no forward supplementary attachments and has its own fixing rods extending rearwardly of the unit.
  • a light projector comprising a lamp housing having a body, a source of light, an elliptical reflector, a parabolic reflector, means for mounting said reflectors on said body, at least one of said reflectors being removable from said body, and mounting means permitting the support of supplementary fittings on said body, said mounting means comprising a plurality of extension rods releasably securable to said body to project forwardly therefrom parallel with the common optical axis of said reflectors.
  • both said reflectors are adapted for concurrent mounting on said body, with one said reflector in its operative position being located within and shielding the other said reflector, which is rendered operative by removal of said one reflector.
  • a light projector according to claim 1 further comprising a range of supplementary fittings which are adapted for interchangeable mounting on said extension rods.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
US457404A 1973-04-04 1974-04-03 Light projector fittings Expired - Lifetime US3892960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1618273A GB1462183A (en) 1973-04-04 1973-04-04 Light fittings

Publications (1)

Publication Number Publication Date
US3892960A true US3892960A (en) 1975-07-01

Family

ID=10072652

Family Applications (1)

Application Number Title Priority Date Filing Date
US457404A Expired - Lifetime US3892960A (en) 1973-04-04 1974-04-03 Light projector fittings

Country Status (15)

Country Link
US (1) US3892960A (US20100056889A1-20100304-C00004.png)
JP (1) JPS5069884A (US20100056889A1-20100304-C00004.png)
AU (1) AU6745474A (US20100056889A1-20100304-C00004.png)
BE (1) BE813253A (US20100056889A1-20100304-C00004.png)
BR (1) BR7402693D0 (US20100056889A1-20100304-C00004.png)
CA (1) CA1002502A (US20100056889A1-20100304-C00004.png)
DE (2) DE7411726U (US20100056889A1-20100304-C00004.png)
ES (1) ES424989A1 (US20100056889A1-20100304-C00004.png)
FR (1) FR2224706B1 (US20100056889A1-20100304-C00004.png)
GB (1) GB1462183A (US20100056889A1-20100304-C00004.png)
HK (1) HK38280A (US20100056889A1-20100304-C00004.png)
IL (1) IL44553A0 (US20100056889A1-20100304-C00004.png)
IT (1) IT1007781B (US20100056889A1-20100304-C00004.png)
NL (1) NL7404276A (US20100056889A1-20100304-C00004.png)
ZA (1) ZA742157B (US20100056889A1-20100304-C00004.png)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097919A (en) * 1975-10-24 1978-06-27 Emerson Electric Co. Illumination system
US4173687A (en) * 1978-06-20 1979-11-06 Occidental Research Corporation Current generating cell with alloy anode
EP2616739A1 (en) * 2010-09-17 2013-07-24 Profoto AB A lighting head, a fastening fixture and a reflector for a lighting system
GB2509836A (en) * 2013-01-15 2014-07-16 Snap On Tools Corp Reflector

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012340C2 (de) * 1980-03-29 1984-06-20 W.C. Heraeus Gmbh, 6450 Hanau Operationsleuchte
JPS63196505U (US20100056889A1-20100304-C00004.png) * 1987-06-08 1988-12-19
DE4005355A1 (de) * 1990-02-16 1991-09-26 Sill Franz Gmbh Leuchte, insbesondere display-strahler

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1711477A (en) * 1929-04-30 Traffic signal
US1737995A (en) * 1925-11-16 1929-12-03 Cooke Patents Inc Headlight
US2026156A (en) * 1933-12-02 1935-12-31 Horace W Alexander Medical examination lamp
US2218678A (en) * 1938-05-06 1940-10-22 Scovill Manufacturing Co Double reflector flashlight
US3348036A (en) * 1965-10-15 1967-10-17 Sunbeam Lighting Co Inc Examination light
US3578965A (en) * 1969-09-26 1971-05-18 Berkey Colortran Mfg Inc Foldable luminaire
US3622778A (en) * 1967-12-19 1971-11-23 Cibie Projecteurs Vehicle headlamp with two light sources

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1711477A (en) * 1929-04-30 Traffic signal
US1737995A (en) * 1925-11-16 1929-12-03 Cooke Patents Inc Headlight
US2026156A (en) * 1933-12-02 1935-12-31 Horace W Alexander Medical examination lamp
US2218678A (en) * 1938-05-06 1940-10-22 Scovill Manufacturing Co Double reflector flashlight
US3348036A (en) * 1965-10-15 1967-10-17 Sunbeam Lighting Co Inc Examination light
US3622778A (en) * 1967-12-19 1971-11-23 Cibie Projecteurs Vehicle headlamp with two light sources
US3578965A (en) * 1969-09-26 1971-05-18 Berkey Colortran Mfg Inc Foldable luminaire

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097919A (en) * 1975-10-24 1978-06-27 Emerson Electric Co. Illumination system
US4173687A (en) * 1978-06-20 1979-11-06 Occidental Research Corporation Current generating cell with alloy anode
EP2616739A1 (en) * 2010-09-17 2013-07-24 Profoto AB A lighting head, a fastening fixture and a reflector for a lighting system
EP2616739A4 (en) * 2010-09-17 2014-06-11 Profoto Ab LIGHTING HEAD, FIXING ARMATURE AND REFLECTOR FOR A LIGHTING SYSTEM
GB2509836A (en) * 2013-01-15 2014-07-16 Snap On Tools Corp Reflector
US9004727B2 (en) 2013-01-15 2015-04-14 Snap-On Incorporated Interchangeable reflectors for light devices
GB2509836B (en) * 2013-01-15 2015-11-11 Snap On Tools Corp Interchangeable reflectors for light devices
AU2013245557B2 (en) * 2013-01-15 2018-02-22 Snap-On Incorporated Interchangeable reflectors for light devices

Also Published As

Publication number Publication date
FR2224706B1 (US20100056889A1-20100304-C00004.png) 1977-10-21
NL7404276A (US20100056889A1-20100304-C00004.png) 1974-10-08
JPS5069884A (US20100056889A1-20100304-C00004.png) 1975-06-10
BE813253A (fr) 1974-07-31
ES424989A1 (es) 1976-06-01
DE2416236A1 (de) 1974-10-24
CA1002502A (en) 1976-12-28
IT1007781B (it) 1976-10-30
HK38280A (en) 1980-07-25
GB1462183A (en) 1977-01-19
BR7402693D0 (pt) 1974-12-03
DE7411726U (de) 1977-04-07
ZA742157B (en) 1975-04-30
AU6745474A (en) 1975-10-02
FR2224706A1 (US20100056889A1-20100304-C00004.png) 1974-10-31
IL44553A0 (en) 1974-06-30

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