<19»United States
`(12)Patent Application
`Vefl'er
`
`Publication
`
`<10)Pub.N0.:US 2005/0036322A1
`(43)Pub. Date:
`Feb. 17, 2005
`
`US 2OOSOO36322A1
`
`(54) LAMP
`
`Publication Classification
`
`(76)
`
`lnventor: Samuel C. Vefier, Toronto (CA)
`
`Int. Cl.’
`(51)
`(52) U.S.Cl.
`
`F2lV 33/00
`.............36E373
`
`Correspondence Address:
`SMART AND BIGGAR
`438 UNIVERSITY AVENUE
`SUITE I500 BOX lll
`TORONTO, ON MSGZKS (CA)
`
`(21) Appl. No.:
`
`10/900,172
`
`(22) Filed:
`
`Jul. 28. 2004
`
`Related U.S. Application Data
`
`(60)
`
`Provisional application No. 60/490,248, filed on Jul.
`23, 2003.
`
`(57)
`
`ABS'l‘RAC'l‘
`
`A lamp has a cover at least partially enveloping a light
`receptacle so as to define a receptacle chamber. A light trap
`is provided atop the cover with a first heat vent communi­
`cating between lhe receptacle chamber and an interior of
`said light
`trap and a second heat vent communicating
`between an interior of said light
`trap and an ambient
`environment. The light trap is arranged to at least substan­
`tially prevent
`light which enters the first heat vent from
`reaching the second heat vent while allowing heat which
`enters said first heat vent to pass through said second heat
`vent. With this arrangement, the light emitted from the cover
`may be blocked with atshroud without overheating the lamp.
`
`i 44
`§ A‘ \\
`\\
`
`26
`
`\./
`
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`
`52
`
`1
`
`38__/-‘
`
`36
`
`"6¢
`
`\ K!!!
`||-—-||
`34/\'\\
`
`­
`

`

`Patent Application Publication Feb. 17, 2005 Sheet 1 of 4
`
`US 2005/0036322 Al
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`§ Q
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`§
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`F_IG-_1-
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`\\
`
`

`

`Patent App|lC3ll0Il Publlcatlon Feb 17 2005 Qhact 2 of 4
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`US 2005/0036322 Al
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`23
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`a
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`­
`

`

`Patent Application Publication Feb. 17, 2005 Sheet 3 0f 4
`
`US 2005/0036322 A1
`
` 'Illllllllllllllll”
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`Patent Application Publication Feb. 17, 2005 Sheet 4 of 4
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`US 2005/0036322 A1
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`US 2005/0036322 A1
`
`Feb. 17, 2005
`
`LAMP
`
`CROSS-REFERENC E TO RELATED
`APPLICATION
`
`FIG. 4 is a perspective view of a lamp made in
`[0013]
`accordance with another aspect of this invention, and
`
`[0014] FIG. 5 is a cross-sectional view of the lamp of
`FIG. 4.
`
`[0001] This application claims priority from U.S. provi­
`sional application No. 60/490,248, filed Jul. 28, 2003.
`
`DETAILED DESCRIPTION
`
`BACKGROUND OF INVENTION
`
`[0002] This invention relates to a lamp.
`
`[0003] Sabbath observant Jews may not turn electrical
`switches on or o[[ during the Sabbath: from sundown on
`Friday until after dark on Saturday. This can force a family
`to leave some lights on during this period, however, the
`illumination may disturb others, especially those trying to
`sleep.
`
`[0004] This invention seeks to ameliorate this problem.
`
`SUMMARY OF INVENTION
`
`the inconvenience
`lamp reduces
`[0005] The subject
`caused by a lamp that remains electrically turned on by
`providing a lamp suitable for reading or other purposes that
`is adapted to selectively provide light.
`
`[0006] The lamp has a cover at least partially enveloping
`a light receptacle so as to define a receptacle chamber. A
`light trap is provided atop the cover with a first heat vent
`communicating between the receptacle chamber and an
`interior of said light trap and a second heat vent commitm­
`cating between an interior of said light trap and an ambient
`environment. The light trap is arranged to at least substan­
`tially prevent
`light which enters the first heat vent from
`reaching the second heat vent while allowing heat which
`enters said first heat vent to pass through said second heat
`vent. With this arrangement, the light emitted from the cover
`may be blocked with a shroud without overheating the lamp.
`
`[0007] Accordingly, the present invention provides a lamp
`comprising: a light receptacle; a cover at least partially
`enveloping said light receptacle so as to define a receptacle
`chamber; a light
`trap atop said cover; a first heat vent
`communicating between said receptacle chamber and an
`interior of said light trap; a second heat vent communicating
`between an interior of said light
`trap and an ambient
`environment; said light trap arranged to at least substantially
`prevent light which enters said first heat vent from reaching
`said second heat vent while allowing heat which enters said
`first heat vent to pass through said sewnd heat vent.
`
`[0008] Uther features and advantages will become appar­
`ent from a review of the following description in conjunc­
`tion with the drawings.
`
`BRIEF DESCRIPTION OF TIIE DRAVVINGS
`
`In the figures which illustrate example embodi­
`[0009]
`ments of the invention,
`
`[0010] FIG. 1 is and exploded view of a lamp made in
`accordance with this invention,
`
`[0011] FIG. 2 is a cross-sectional view of the lamp of
`mo. 1,
`[0012] FIG. 3 is a cross-sectional view along the lines 3-3
`of FIG. 2,
`
`[0015] Broadly, the lamp allows the escape of heat even
`when light from the lamp is blocked. In this regard, the lamp
`may have a moveable shade body providing a selectively
`sized aperture for allowing emission of a selective amount of
`light.
`[0016] Turning to FIGS. 1 through 3, a table lamp 10 has
`a top unit 12 having a cylindrical tubular shroud 14 with a
`side wall 16 having an opening 18 therethrough. The open­
`ing is covered with a translucent light diffusing sheet 19. The
`lumen of the shroud is lined with a refiective sheet 21
`opposite opening 1S.Al_ight trap 20 extends from the top end
`of the tubular shroud 14. As seen in FIGS. 2 and 3, there is
`an off-center heat vent hole 22 in the bottom wall 24 of the
`light trap inside of the cylindrical side wall 16 of tubular
`body 14. There is a second heat vent hole 26 in a side wall
`28 of the light trap. A series of balfles 30 extend between the
`two heat vents so as to provide a tortuous path between the
`two heat vents.
`
`[0017] A bottom unit 32 has a base 34 with a tubular cover
`36 extending upwardly therefrom. The tubular cover 36 has
`a side wall 38 having an aperture 40 (the other like shaped
`areas of side wall 38 are not apertures). The base houses a
`light receptacle 42 extending inside of the cover 36 for a
`light 44. Thus, the cover defines a receptacle chamber 45. A
`cord 46 for the receptacle runs through the base 34. An
`annular support 50 extends from the base 34 within the cover
`36. Abearing ring 52 rests on the annular support 50 and the
`base of the shroud 14 rests on the bearing ring 52. The
`shroud 14 and cover 36 are si7ed so that
`the clearance
`between the top of the cover and the bottom wall 24 of the
`light trap is small. Additionally, the clearance between the
`side wall 16 of the shroud and the side wall 38 of the cover
`36 may be small. In consequence little, if any, light can
`escape through the top of the cover with the shroud resting
`on the ring bearing 52.
`
`In operation, the light trap 20 may be grasped by a
`[0018]
`user and the top unit 12 rotated with respect to the bottom
`unit 36 so that the opening 18 in the shroud wall 16 may be
`partially or fully aligned with the aperture 40 in the cover 36.
`In this way, with the light 44 illuminated, a selective amount
`of light may be emitted from the lamp 10. Further, with the
`light illuminated, heat is vented through the vent holes 22,
`26 in the light trap 20. However, little if any light can escape
`from the light trap because of the bafiles 30 intervening
`between the vent holes.
`
`[0019] Sabbath observant Jews are not permitted to move
`a light source. It will be apparent from the foregoing that
`when a user grasps the light trap 20 of lamp 10 and rotates
`the top unit 12, the bottom unit 36 does not move. Further,
`it is the bottom unit that supports the light receptacle 42.
`Consequently, the user does not move the light supporting
`bottom unit when rotating the top unit. Therefore, lamp 10
`may be operated by Sabbath observant Jews.
`
`[0020] The amount of light leaving the lamp is dependent
`upon the degree of overlap of the opening 18 in the shroud
`
`

`

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`
`US 2005/0036322 Al
`
`Feb. 17, 2005
`
`Wall 16 and the aperture 40 in the side wall 38 of the cover
`36. This degree of overlap is selected by a user rotating the
`top unit 12.
`
`[0021] The shroud opening 18 may have a diffuser sheet
`19 to diffuse light emitted by the lamp. The lamp may use
`high efficiency (low energy) bulbs. The reflective backdrop
`21 increases the light emerging from the lamp When the
`cut-outs are aligned.
`
`[0022] There are at least the following unique aspects of
`this la|np:
`
`[0023] A non-electric dimming function: the amount
`of light emitted can be varied manually by rotating
`the shroud; the effect of a “dimmer” is accomplished
`With no special electronics nor special bulb.
`
`[0024] A directional reading lamp: the shroud and
`cover, with their defined openings
`allow,
`for
`example, one person in a bedroom to read without
`the light disturbing another person sleeping in the
`room.
`
`the lamp can be effectively
`Sabbath use:
`[0025]
`“turned ofi” Without requiring electrically switching
`off the light and without moving the light source; this
`allows Sabbath observant Jews who may not turn
`electrical switches on or off to use the lamp as a
`bedside reading lamp on the Sabbath.
`
`[0026] Thus, Sabbath use is only one of the uses of the
`subject lamp and lamp shade.
`
`[0027] Optionally, more than one vent hole 22 and vent
`hole 26 may be provided so long as the baflles provide a
`tortuous path between all of the vent holes 22 in the bottom
`of the light trap and the vent holes 26 in the side of the light
`trap. Optionally, the base 34 may be enclosed and have an
`upper wall Withat least one vent into the base separated from
`one or more holes in the side of the base by baffles. This
`would provide another egress for heat, while trapping light.
`
`[0028] Rather than have the reflective backdrop lining the
`lumen of the shroud, it may be aflixed to the inner surface
`of the base such that the light bulb is between the reflective
`backdrop and the aperture 40 in the side wall 38 of the cover
`36.
`
`[0029] Other arrangements may also be used to provide a
`table lamp which may allow a selective amount of light to
`emerge. For example,
`the shroud could comprise a box
`which may be opened a selective amount, which box may
`have a mirror as the backdrop such that
`the box also
`functions as a jewellery box. As a further alternative, the
`lamp could have a shroud with a sliding door or shutters. ln
`all instances, a light trap may be provided above the light
`receptacle.
`
`[0030] This invention may also be embodied in a wall
`lamp as, [or example, the wall lamp 100 of FIGS. 4 and 5.
`Turning to these FIGS., wall lamp 100 has a cover 136 with
`a frusto-conical cover side wall 137 and a bottom wall 138
`with an arcuate aperture 140 therein. The top wall 124 of the
`cover supports a light receptacle 142 for a light 144. Thus,
`the cover defines a receptacle chamber 145. A cord 146 for
`the receptacle runs through a tube 139 extending from the
`side wall 137 of the cover to a base 134. A light trap 120
`extends from the top end of the cover 136. As seen in FIG.
`
`5, there is an off-center heat vent hole 122 in the top wall 124
`of the cover—which is also the bottom wall of the light
`trap—inside of the frusto-conical side wall 137 of cover 136.
`There is a second heat vent hole 126 in a side wall 128 of
`the light trap. Aseries o[ba[l1es 130 extend between the two
`heat vents so as to provide a tortuous path between the two
`heat vents.
`
`[0031] The wall 116 of a disk-shaped shroud 114 has an
`areuate opening 118 therethrough. The shroud 114 is cen­
`trally mounted to the bottom Wall 138 of cover 136 by pivot
`152 so that the shroud can be rotated with respect
`to the
`bottom wall 138 of cover 136.
`
`In operation, the shroud may be rotated (by rotating
`[0032]
`the pivot 152) so that the opening 118 in the shroud is
`selectively aligned with aperture 140 in the bottom wall 138
`of the cover 136. In this way, a selective amount oflight may
`be emitted [rom lamp 100. Again, the light trap 120 acts to
`vent heat from the lamp, while trapping light.
`
`to those
`[0033] Other modifications will be apparent
`skilled in the art and, therefore, the invention is defined in
`the claims.
`
`What is claimed is:
`1. A lamp wmprising:
`
`a light receptacle;
`
`a cover at least partially enveloping said light receptacle
`so as to define a receptacle chamber;
`
`a light trap atop said cover;
`
`a first heat vent communicating between said receptacle
`chamber and an interior of said light trap;
`
`a second heat vent communicating between an interior of
`said light trap and an ambient environment;
`
`said light trap arranged to at least substantially prevent
`light which enters said first heat vent from reaching
`said sewnd heat vent while allowing heat which enters
`said first heat vent to pass through said second heat
`vent.
`2. The lamp of claim 1 wherein said light trap provides a
`tortuous path between said first heat vent and said second
`heat vent.
`3. The lamp of claim 2 wherein said light trap comprises
`a series of baffles.
`4. The lamp of claim 1 wherein said cover is fixed to said
`receptacle.
`5. The lamp of claim 4 wherein said cover has an aperture.
`6. The lamp of claim 5 further comprising a shroud
`rotatable With respect to said cover for selectively unblock­
`ing, partially blocking, or completely blocking said aperture.
`7. The lamp of claim 6 wherein said shroud has a wall and
`an opening in its wall rotatable into alignment with said
`aperture of said cover.
`8. The lamp of claim 7 wherein one of said shroud
`opening and said cover aperture is covered with a light
`diffusing sheet.
`9. The lamp of claim 7 wherein said cover is tubular and
`said aperture is an opening in a Wall of said cover.
`10. The lamp of claim 9 further comprising an annular
`support within said cover below said aperture and wherein
`said shroud is tubular and rests on said support.
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`US 2005/0036322 Al
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`Feb. l7, 2005
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`ll. The lamp of claim IO further comprising a bearing
`ring on said annular support against which said shroud rcsls.
`12. The lamp of claim 10 wherein said annular support is
`in said receptacle chamber.
`13. Thc lamp u[ claim l2 whcrcin a lumcn of said tubular
`shroud is at least partially lined with a light reflective sheet.
`14. The lamp of claim 10 wherein said shroud terminates
`in said light trap.
`15. The lamp of claim 7 wherein said aperture is a
`downwardly opening aperture.
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`16. The lamp of claim I5 wherein said cover comprises a
`disk, said disk having said aperture.
`17. The lamp of claim 16 wherein said shroud comprises
`a disk, said disk having said opening, said shroud disk
`rotatahly mounted to said cover disk.
`18. The lamp of claim 17 wherein said light trap is aflixed
`to a top of said cover.
`
`*
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`1
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`*
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`*
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`*
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`