EP0206702A2 - Lampe portative avec ensemble de réflecteurs réglables - Google Patents

Lampe portative avec ensemble de réflecteurs réglables Download PDF

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Publication number
EP0206702A2
EP0206702A2 EP86304588A EP86304588A EP0206702A2 EP 0206702 A2 EP0206702 A2 EP 0206702A2 EP 86304588 A EP86304588 A EP 86304588A EP 86304588 A EP86304588 A EP 86304588A EP 0206702 A2 EP0206702 A2 EP 0206702A2
Authority
EP
European Patent Office
Prior art keywords
reflectors
light
lantern
adjustable
fixed
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.)
Ceased
Application number
EP86304588A
Other languages
German (de)
English (en)
Other versions
EP0206702A3 (fr
Inventor
Tor H Petterson
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.)
Spectrum Brands Inc
Original Assignee
Rayovac Corp
Ray O Vac Corp
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 Rayovac Corp, Ray O Vac Corp filed Critical Rayovac Corp
Publication of EP0206702A2 publication Critical patent/EP0206702A2/fr
Publication of EP0206702A3 publication Critical patent/EP0206702A3/fr
Ceased 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0066—Reflectors for light sources specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L2/00—Systems of electric lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/02—Electric lighting devices with self-contained electric batteries or cells characterised by the provision of two or more light sources
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F21V14/045—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors in portable lighting devices
    • 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
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment

Definitions

  • This invention relates generally to lighting apparatus, and, more particularly, to portable lanterns and the like having adjustable reflector assemblies.
  • Lighting apparatus such as portable kerosene and electric lanterns typically project light in a horizontal plane extending over 360 degrees. In most cases, this projection pattern is satisfactory. Sometimes, however, it is desirable to limit the angular extent of the lantern's projected light. For example, when such lanterns are used in camping, it is frequently desirable to limit the angular extent of the projected light, e. g. . to 180 degrees, so as not to disturb neighboring campers.
  • lanterns of this kind have sometimes included shutters for limiting the angular extent of the projected light.
  • These shutters which typically have been in the form of a slide or door mounted on the lantern's exterior, have not proven to be entirely satisfactory.
  • they are not generally arranged to redirect outwardly all light initially emitted in undesired directions.
  • such shutters have not permitted a convenient adjustment of the angular extent of the projected light, between a 360 degree pattern and a predetermined smaller pattern.
  • a lantern having an adjustable reflector assembly that permits a convenient selection of the angular pattern of the projected light, between a 360 degree pattern and a predetermined smaller pattern (e.a., 1 80 degrees), and that projects substantially all of the generated light such that the projected light's average intensity varies inversely with its angular extent.
  • the present invention fulfills this need.
  • the present invention is embodied in a lighting apparatus such as a portable lantern having an adjustable reflector assembly that permits convenient adjustment of the angular extent of the projected light, between a 360 degree pattern and a predetermined smaller pattern.
  • the adjustable reflector assembly is inexpensive to manufacture and convenient to use, and it redirects substantially all of the light incident on it such that the projected light's average intensity varies inversely with its angular extent.
  • the lighting apparatus of the invention includes first and second light sources, preferably in the form of linear light tubes arranged in spaced, parallel relationship.
  • First and second fixed reflectors are located generally back-to-back between the two light sources and are adapted to reflect substantially all of the light incident on them from the two sources.
  • First and second movable reflectors are located in predetermined relationships relative to the respective first and second fixed reflectors.
  • Adjustment means selectively moves the first and second movable reflectors between a retracted position, in which each movable reflector is aligned with the associated fixed reflector, and an extended position, in which each movable reflector is located alongside the associated fixed reflector. With the movable reflectors in their retracted positions, the lantern projects light over a 360 degree pattern, and with the movable reflectors in their extended positions, the lantern projects light over predetermined smaller pattern, e.g., 180 degrees.
  • the fixed and movable reflectors are all cylindrically concave, with circular cross-sections.
  • the fixed and movable reflectors in each associated pair have central or longitudinal axes that are coincident with each other and spaced a predetermined distance from the longitudinal axis of the associated light source.
  • the adjustment means includes actuator means for controllably pivoting the first and second movable reflectors about their respective longitudinal axes, to move the reflectors between their retracted and extended positions.
  • the various reflectors are preferably sized such that when the movable reflectors are pivoted to their extended positions, they cooperate with the fixed reflectors to reflect about one-half of the light generated by the two light sources. The resulting pattern of projected light extends over about 180 degrees.
  • the actuator means is adapted to pivot the respective first and second movable reflectors to any selected pivotal position between their retracted and extended positions. This correspondingly controls the angular extent of the projected light.
  • the lantern includes first and second light tubes lla and llb vertically arranged in spaced parallel relationship. Each light tube is adapted to project light in a 360 degree horizontal plane.
  • the light tubes are preferably fluorescent and powered by a suitable battery (not shown) located within a housing 13 immediately beneath the tubes.
  • the light tubes are located within a closed chamber immediately overlaying the battery housing, the chamber being defined by a bottom wall 15, a top wall 17 and an encircling transparent side wall or window 19.
  • a special adjustable reflector assembly is located in the closed chamber, generally between the first and second light bues lla and llb.
  • the assembly includes first and second fixed reflectors 21a and 21b extending between the respective bottom and top walls 15 and 17, in predetermined fixed relationships relative to the respective first and second light tubes.
  • the first fixed reflector 21a includes a cylindrically concave reflective surface facing the first light tube lla and adapted to reflect light received from it
  • the second fixed reflector 2 1b similarly includes a cylindrically concave reflective surface facing the second light tube and adapted to reflect light received from it.
  • the reflector assembly further includes first and second pivotal reflectors 23a and 23b extending between the respective bottom and top walls 15 and 17, in predetermined pivotal relationships relative to the respective first and second light tubes lla and llb.
  • the first pivotal reflector 23a includes a cylindrically concave reflective surface facing the first light tube lla and adapted to reflect light received from it
  • the second pivotal reflector 23b similarly includes a cylindrically concave reflective surface facing the second light tube llb and adapted to reflect light received from it.
  • the reflector assembly further includes a reciprocable actuator 25 for controllably pivoting the respective first and second pivotal reflectors 23a and 23b about their central or longitudinal axes, between two extreme positions.
  • a fully retracted position depicted in FIG. 4
  • the two pivotal reflectors are pivoted to positions directly in front of their associated fixed reflectors 21a and 21b.
  • the reflectors intercept a minimum proportion of light emitted by the light tubes lla and llb, and the lantern projects light in a 360 degree pattern.
  • a fully extended position depicted in FIGS.
  • the pivotal reflectors are pivoted to positions alongside, i.e., angularly contiguous with, the associated fixed reflectors. In this fully extended position, the reflectors intercept a maximum proportion of light emitted by the light tubes, and the lantern projects light in an angular pattern limited to about 180 degrees.
  • the fixed reflectors 21a and 21b and pivotal reflectors 23a and 23b all have reflective surfaces with circular horizontal cross-sections.
  • each associated pair of fixed and pivotal reflectors i.e., reflectors 21a and 23a and reflectors 21b and 23b, are arranged with their respective longitudinal axes coincident with each other.
  • the radius of the two pivotal reflectors 4- slightly less than that of the two fixed reflectors.
  • the pivotal reflectors prevent any light from impinging on the fixed reflectors and a minimum proportion of the light emitted by the first and second light tubes lla and llb is intercepted and reflected. Conversely, when the pivotal reflectors are pivoted into their fully-extended positions (FIG. 3), they are alongside the associated fixed reflectors and a maximum proportion (about one-half) of the light emitted by the light tubes is intercepted and reflected.
  • FIG. 6 is a schematic diagram showing the angular pattern and intensity of the light projected by the lantern when the pivotal reflectors 23a and 23b are fully retracted.
  • the solid-line arrows 27 indicate the various paths of light emitted by the light tubes lla and llb in directions bypassing the reflectors 21a, 21b, 23a and 23b.
  • the dotted-line arrows 29 indicate the various paths of light emitted by the light tubes in directions impinging on the reflectors. It will be observed that because the light tubes are spaced from the central axes of the reflectors, the reflected light passes to the side of the light tubes and thus supplements the light initially emitted directly outwardly. Substantially all of the light generated by the two light tubes is therefore projected outwardly, in a 3 6 0 degree pattern.
  • FIG. 5 is a schematic diagram similar to FIG. 6, but showing the angular pattern and intensity of light projected Ly the lantern when the pivotal reflectors 23a and 23b are fully extended.
  • the solid-line arrows 31 indicate the various paths of light emitted in directions bypassing the reflectors 21a, 21b, 23a and 23b, and the dotted-line arrows 33 indicate the various paths of light emitted in directions impinging on the reflectors.
  • the light tubes lla and llb are spaced from the central axes of the reflectors, nearly all of the reflected light passes to the side of the light tubes and thus supplements the light initially emitted directly outwardly.
  • This reflector configuration results in a light projection pattern extending over about 180 degrees.
  • each pivotal reflector 23a or 23b includes an upper pivot arm 35a or 35b located at the reflector's upper end and a lower pivot arm 37a or 37b located at the reflector's lower end.
  • An upper pivot pin 39a or 39b projects upwardly from the upper arm, for reception in a correspondingly-sized slot (not shown) formed in the lantern's top wall 17 (FIG. 1).
  • a lower pivot pin 41a or 41b projects downwardly from the lower arm, for reception in a correspondingly-sized slot (not shown) formed in the lantern's bottom wall 15 (FIG. 1).
  • the pivot pins are aligned with the reflectors' central or longitudinal axes, and they are located close to, but nevertheless spaced from, the longitudinal axes of the associated light tubes lla and llb.
  • the pivotal reflectors 23a and 23b are pivoted about their respective pivot pins 39a and 41a, and 39b and 41b, by means of the reciprocable actuator 25, which is located immediately above the reflector assembly.
  • the actuator includes an elongated body 43, with its two ends being accessible from the lantern's exterior, as shown in FIG. 1.
  • Arms 45a and 45b project laterally from opposite sides of the body, with each arm including a slot 47a or 47b adapted to slidably receive a corresponding finger 49a or 49b projecting upwardly from the respective upper arms 39a and 39b of the two pivotal reflectors.
  • light projection patterns between 360 degrees and 180 degrees can be produced by moving the actuator 25 to positions between the two extreme positions.
  • the size of the projection pattern correspondingly shrinks from its initial 360 degree pattern to its final 180 degree pattern.
  • the fixed reflectors 21a and 21b are preferably formed as two walls of a single element.
  • this single element can further include two additional walls 51a and 5Ib (FIG. 2) such that the element has a generally tubular - configuration.
  • the fixed reflector element is secured in its position between the lantern's bottom wall 15 and top wall 17 by a shaft (not shown) extending throughout its length.
  • the fixed reflectors 21a and 21b, pivotal reflectors 23a and 23b, and actuator 25 can all be conveniently formed of a suitable molded plastic material.
  • the reflectors are coated with any suitable reflective material.
  • the present invention provides an improved lantern having a special adjustable reflector assembly that permits convenient selection of the angular extent of the projected light, ranging between a 360 degree pattern and a predetermined smaller pattern, e.g., 180 degrees.
  • the reflector assembly is specially configured such that substantially all of the generated light is projected outwardly, and the project light's average intensity is substantially inversely proportional to its angular extent.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP86304588A 1985-06-21 1986-06-16 Lampe portative avec ensemble de réflecteurs réglables Ceased EP0206702A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US74764885A 1985-06-21 1985-06-21
US747648 1985-06-21

Publications (2)

Publication Number Publication Date
EP0206702A2 true EP0206702A2 (fr) 1986-12-30
EP0206702A3 EP0206702A3 (fr) 1988-09-07

Family

ID=25006040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86304588A Ceased EP0206702A3 (fr) 1985-06-21 1986-06-16 Lampe portative avec ensemble de réflecteurs réglables

Country Status (2)

Country Link
EP (1) EP0206702A3 (fr)
CA (1) CA1258842A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214285A (en) * 1988-01-20 1989-08-31 Light Years Ahead Ltd Space lighting
EP0843127A3 (fr) * 1996-11-13 1999-06-30 Leon Alejandro Lassovsky Système d'éclairage avec réflecteurs pivotables
US7222986B2 (en) 2005-03-07 2007-05-29 Daka Research Inc. Multiple swivel flashlight
US9335041B2 (en) 2012-05-07 2016-05-10 Abl Ip Holding Llc LED light fixture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020253189A1 (fr) * 2019-06-17 2020-12-24 宁波福泰电器有限公司 Lampe et procédé d'assemblage associé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI52145C (fi) * 1971-01-12 1977-06-10 Tarmo Aatos Nykaenen Valaisin.
FR2517022A1 (fr) * 1981-11-24 1983-05-27 Wetzel Equipelec Sarl Luminaire suspendu pour source lumineuse lineaire, notamment pour tubes fluorescents

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214285A (en) * 1988-01-20 1989-08-31 Light Years Ahead Ltd Space lighting
US5003445A (en) * 1988-01-20 1991-03-26 Light Years Ahead Limited Space lighting
GB2214285B (en) * 1988-01-20 1992-04-08 Light Years Ahead Ltd Space lighting
EP0843127A3 (fr) * 1996-11-13 1999-06-30 Leon Alejandro Lassovsky Système d'éclairage avec réflecteurs pivotables
ES2137091A1 (es) * 1996-11-13 1999-12-01 Lassovsky Leon A Sistema de luminaria con reflectores redireccionables.
US7222986B2 (en) 2005-03-07 2007-05-29 Daka Research Inc. Multiple swivel flashlight
US9335041B2 (en) 2012-05-07 2016-05-10 Abl Ip Holding Llc LED light fixture
US10006604B2 (en) 2012-05-07 2018-06-26 Abl Ip Holding Llc LED light fixture

Also Published As

Publication number Publication date
CA1258842A (fr) 1989-08-29
EP0206702A3 (fr) 1988-09-07

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Inventor name: PETTERSON, TOR H