US3720826A - Tubular electric discharge lamp with integral protective-insulating sleeve - Google Patents
Tubular electric discharge lamp with integral protective-insulating sleeve Download PDFInfo
- Publication number
- US3720826A US3720826A US00034806A US3720826DA US3720826A US 3720826 A US3720826 A US 3720826A US 00034806 A US00034806 A US 00034806A US 3720826D A US3720826D A US 3720826DA US 3720826 A US3720826 A US 3720826A
- Authority
- US
- United States
- Prior art keywords
- envelope
- lamp
- sleeve
- spaced
- members
- 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
Links
- 239000004033 plastic Substances 0.000 claims abstract description 20
- 239000011521 glass Substances 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 239000012858 resilient material Substances 0.000 claims description 5
- 229920005668 polycarbonate resin Polymers 0.000 claims description 4
- 239000004431 polycarbonate resin Substances 0.000 claims description 4
- 230000002596 correlated effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
-
- 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
- F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
Definitions
- ABSTRACT insulating jacket which permits the lamp to operate efficiently at low ambient temperatures (-18C for example).
- the sleeve can be fabricated from colored plastic or glass to provide a low-cost fluorescent lighting unit that emits light of a selected colorand is thus especially adapted for use in outdoor decorative lighting applications.
- This invention relates to electric lamps and has particular reference to an improved fluorescent lamp assembly that is adapted for use in lighting applications where protection against accidental lamp breakage is desired and/or low ambient temperatures prevail.
- Fluorescent lighting units having integral protective and thermal-insulating shields or jackets are well known in the art.
- the jacket was held in spaced-apart enclosing relationship with the lamp envelope by a pair of resilient caps or gaskets that were slipped over the based end portions of the lamp and engaged the adjacent ends of the sleeve thereby providing a sealed air space around the entire lamp envelope.
- a fluorescent lighting unit constructed in this manner is disclosed in US. Pat. No. 3,124,307 issued Mar. 10, 1964 to T. E. Hoskins et al.
- the open ends of the sleeve are not restricted or constrained in any manner and the sleeve is thus, suspended in telescoped and shielding relationship with the lamp envelope.
- the sleeve is accordingly free to expand and contract relative to the envelope without slipping off of the lamp and can thus be made of plastic, even though the lamp is intended for use in low-temperature environments.
- the resulting lamp assembly is light in weight, easy to assemble and requires inexpensive sleeve and sleeveretaining components.
- FIG. 1 is a side elevational view, partly in section, of a fluorescent lighting unit incorporating the invention.
- FIG. 2 is an end view of the lighting unit.
- the improved lighting unit 10 consists of an elongated fluorescent lamp L that has a cylindrical glass envelope 12 which is protectively disposed within an open-ended tubular sleeve 14 of rigid light-transmitting material.
- the sleeve 14 is suspended in spaced-apart telescoped relationship with the envelope 12 by a pair of resilient brand-like members such as narrow rubber grommets 15 and 16 that are compressively sandwiched between the sleeve and the ends of the lamp envelope, as shown.
- the sleeve 14 is shorter than the overall length of the lamp L but is of substantially the same length as the lamp envelope l2 and is also cylindrical but slightly larger in diameter so that an annular air space S is provided which surrounds and extends along almost the entire length of the envelope.
- the sleeve 14 can be fabricated from any suitable light-transmitting material, such as glass, but is preferably made of plastic in order to reduce the weight and cost of the lighting unit 10.
- the rubber grommets 15 and 16 have an inside diameter of about 38 mm. and are spaced a predetermined distance X inwardly from the respective open ends of the sleeve 14 and from the base members 17 that are attached to the sealed ends of the envelope 12. For a lamp of the size described, this spacing is approximately 6 mm. and allows the sleeve 14 to move relative to the lamp L (as the ambient temperature changes) without becoming disengaged from the envelope 12.
- the fluorescent lamp L is of conventional construction and contains an ionizable medium consisting of a suitable starting gas, such as neon or a mixture of neon and argon at low pressure, and a predetermined amount of mercury.
- a suitable starting gas such as neon or a mixture of neon and argon at low pressure
- a pair of spaced electrodes are sealed into the envelope 12 and are electrically connected to pin terminals 18 anchored in each of the respective base members 17.
- the energized electrodes in conjunction with the mercury and gas fill, initiate and sustain an electric discharge within the lamp L which excites a layer of phosphor (not shown) coated on the inner surfaces of the envelope 12 in the well known manner.
- Polycarbonate resin sleeves are available in a variety of tubular sizes, wall thicknesses and colors (red, pink, gold, blue, green, etc.).
- three grommets are preferably used and are spaced apart distances equal to about one-third of the lamp length. If a plastic sleeve is used, the inward-spacing dimension X will also be increased to accommodate the larger increments of Iongitudinal expansion and contraction which will occur under varying ambient temperatures due to the longer length of the sleeve.
- the invention provides an inexpensive lighting unit that is light in weight and can be easily and efficiently assembled by simply placing the grommets on the finished lamp and forcibly slipping the sleeve over the grommets.
- the invention permits the units to be safely used in applications where accidental bulb breakage would be hazardous and also provides efficient colored light sources that can be used in outdoor decorative lighting applications, such as amusement parks and the like.
- a lighting unit comprising, in combination;
- a protective shield for said envelope consisting of a rigid tubular open-ended sleeve of light-transmitting plastic that (a) is larger than and is suspended in spaced-apart telescoped relationship with said envelope, (b) is shorter than said lamp, and (c) expands and contracts to a greater degree than said glass envelope under varying ambient temperature conditions, and
- said plastic sleeve on the lamp in the aforesaid relationship with said envelope comprising a plurality of narrow band-like members of resilient material that encircle the envelope at spaced points along its length and are located between said envelope and sleeve, said retaining members being of such size that they compressively grip the encircled parts of the envelope and are in tight frictional engagement with the overlying encircling portions of said sleeve so that the sleeve is securely anchored in place on the lamp solely by said retaining members,
- the retaining members that are located at the ends of said lamp being disposed inwardly a predetermined distance from the respective ends of both the sieeve and envelope such that the plastic sleeve is free and able to expand and contract relative to the glass envelope un er varying ambient temperature conditions without forcing the outermost retaining members off of said lamp.
- said electric lamp comprises a fluorescent lamp that contains an ionizable medium and a pair of spaced electrodes which are connected to terminals that are located at and protrude beyond the respective ends of the lamp envelope and are anchored in base members fastened to the ends of said envelope,
- said open-ended plastic sleeve is of substantially the same length as the envelope and is so positioned that said base members and terminals are exposed
- said retaining members comprise rubber grommets that are spaced inwardly from the respective base members, and
- the distance the outermost grommets are spaced inwardly from the respective ends of the sleeve and base members is correlated with the length of the lamp and increases as the lamp length increases.
- said open-ended sleeve is composed of polycarbonate resin
- said rubber grommets are of substantially uniform wall thickness.
- said fluorescent lamp has a nominal length of approximately 122 centimeters
- the grommets located at the ends of said lamp are disposed approximately 6 mm. inwardly from the respective ends of the sleeve and base members.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3480670A | 1970-05-05 | 1970-05-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3720826A true US3720826A (en) | 1973-03-13 |
Family
ID=21878725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00034806A Expired - Lifetime US3720826A (en) | 1970-05-05 | 1970-05-05 | Tubular electric discharge lamp with integral protective-insulating sleeve |
Country Status (3)
Country | Link |
---|---|
US (1) | US3720826A (pt) |
JP (1) | JPS5111915Y2 (pt) |
CA (1) | CA941433A (pt) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4048537A (en) * | 1976-06-04 | 1977-09-13 | Gte Sylvania Incorporated | Protective ultraviolet-transmitting sleeve for fluorescent lamp |
DE2942995A1 (de) * | 1979-10-24 | 1981-05-07 | Bayer Ag, 5090 Leverkusen | Explosionsgeschuetzte lampenabdeckung |
DE2951546A1 (de) * | 1979-12-21 | 1981-07-02 | Hermann 8500 Nürnberg Leber | Gekapselte langfeldleuchte |
DE3112962A1 (de) * | 1981-04-01 | 1982-10-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | "leuchte fuer leuchtstofflampen mit einem schutzrohr" |
DE3225768A1 (de) * | 1982-07-09 | 1984-01-12 | CEAG Licht- und Stromversorgungstechnik GmbH, 6800 Mannheim | Explosionsgeschuetzte leuchte |
US5182490A (en) * | 1989-08-08 | 1993-01-26 | Thorn Emi Plc | Light sources |
US5188451A (en) * | 1992-04-01 | 1993-02-23 | General Electric Company | One-piece spacer end cap for an elongated jacketed discharge lamp |
WO1993024788A1 (en) * | 1992-05-29 | 1993-12-09 | Anthony's Manufacturing Company, Inc. | Insulator for fluorescent lamp |
US5440467A (en) * | 1994-04-22 | 1995-08-08 | Steelcase Inc. | Task light |
US5536998A (en) * | 1994-11-28 | 1996-07-16 | Royal Lite Manufacturing And Supply Corp. | Fluorescent lamp with a protective assembly |
US5729085A (en) * | 1996-03-22 | 1998-03-17 | Royal Lite Manufacturing And Supply Corp. | Fluorescent lamp with a protective assembly |
WO1999012185A1 (en) * | 1997-09-02 | 1999-03-11 | Sica Michael F | Shatter-resistant lamp assembly and method |
US6078136A (en) * | 1998-11-06 | 2000-06-20 | Royal Lite Manufacturing And Supply Corp. | Fluorescent lamp with a protective assembly having vent holes |
US6246167B1 (en) | 1999-06-29 | 2001-06-12 | Michael F. Sica | U-shaped fluorescent lamp with protective assembly |
US6254318B1 (en) | 1998-12-16 | 2001-07-03 | Michael F. Sica | Apparatus for making numerous holes in a tube |
US6422721B1 (en) | 2000-05-22 | 2002-07-23 | Genlyte Thomas Group Llc | Tube guard system |
US6452324B1 (en) * | 2000-08-30 | 2002-09-17 | General Electric Company | Fluorescent lamp for grocery lighting |
AT410992B (de) * | 2001-12-19 | 2003-09-25 | Ae Austria Aussenleuchten Und | Leuchte für den aussenbereich sowie ein thermoschutzrohr für diese leuchte |
US6632100B1 (en) | 1997-04-23 | 2003-10-14 | Anthony, Inc. | Lighting system method and apparatus socket assembly lamp insulator assembly and components thereof |
US20060034087A1 (en) * | 2004-08-16 | 2006-02-16 | A.L.P. Lighting & Ceiling Products, Inc. | End cap for illumination tube guards |
US20080048541A1 (en) * | 2004-12-20 | 2008-02-28 | Sumrall Ernest N | Polymer-thermal shield for ultra-violet lamp |
GB2453929A (en) * | 2007-10-15 | 2009-04-29 | Anytronics Ltd | A coaxial spacer for a fluorescent lamp tube |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56404Y2 (pt) * | 1973-11-15 | 1981-01-08 | ||
JPS5227707U (pt) * | 1975-08-18 | 1977-02-26 | ||
JPS6138157Y2 (pt) * | 1976-08-16 | 1986-11-04 | ||
JPS62140797U (pt) * | 1986-02-28 | 1987-09-05 | ||
JPH066554Y2 (ja) * | 1990-09-10 | 1994-02-16 | キョーラク株式会社 | ハウジングパネル |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2363109A (en) * | 1942-04-01 | 1944-11-21 | Gen Electric | Vapor lamp jacket |
US2761959A (en) * | 1951-09-06 | 1956-09-04 | Kunins Morris Kamm | Variable color light source |
US3112886A (en) * | 1960-02-01 | 1963-12-03 | Leonard H Kushner | Color control |
US3124307A (en) * | 1964-03-10 | Vapor lamp units | ||
US3136489A (en) * | 1962-01-24 | 1964-06-09 | Oharenko Vladimir | Safety work light |
US3179792A (en) * | 1962-09-06 | 1965-04-20 | Weiss Harry | Fluorescent lamp |
US3358167A (en) * | 1965-10-18 | 1967-12-12 | Gen Electric | Jacketed discharge lamp |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS44843Y1 (pt) * | 1966-02-15 | 1969-01-14 |
-
1970
- 1970-05-05 US US00034806A patent/US3720826A/en not_active Expired - Lifetime
-
1971
- 1971-04-20 CA CA110,783A patent/CA941433A/en not_active Expired
- 1971-05-06 JP JP1971035390U patent/JPS5111915Y2/ja not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3124307A (en) * | 1964-03-10 | Vapor lamp units | ||
US2363109A (en) * | 1942-04-01 | 1944-11-21 | Gen Electric | Vapor lamp jacket |
US2761959A (en) * | 1951-09-06 | 1956-09-04 | Kunins Morris Kamm | Variable color light source |
US3112886A (en) * | 1960-02-01 | 1963-12-03 | Leonard H Kushner | Color control |
US3136489A (en) * | 1962-01-24 | 1964-06-09 | Oharenko Vladimir | Safety work light |
US3179792A (en) * | 1962-09-06 | 1965-04-20 | Weiss Harry | Fluorescent lamp |
US3358167A (en) * | 1965-10-18 | 1967-12-12 | Gen Electric | Jacketed discharge lamp |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4048537A (en) * | 1976-06-04 | 1977-09-13 | Gte Sylvania Incorporated | Protective ultraviolet-transmitting sleeve for fluorescent lamp |
DE2942995A1 (de) * | 1979-10-24 | 1981-05-07 | Bayer Ag, 5090 Leverkusen | Explosionsgeschuetzte lampenabdeckung |
DE2951546A1 (de) * | 1979-12-21 | 1981-07-02 | Hermann 8500 Nürnberg Leber | Gekapselte langfeldleuchte |
DE3112962A1 (de) * | 1981-04-01 | 1982-10-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | "leuchte fuer leuchtstofflampen mit einem schutzrohr" |
DE3225768A1 (de) * | 1982-07-09 | 1984-01-12 | CEAG Licht- und Stromversorgungstechnik GmbH, 6800 Mannheim | Explosionsgeschuetzte leuchte |
US5182490A (en) * | 1989-08-08 | 1993-01-26 | Thorn Emi Plc | Light sources |
US5188451A (en) * | 1992-04-01 | 1993-02-23 | General Electric Company | One-piece spacer end cap for an elongated jacketed discharge lamp |
WO1993024788A1 (en) * | 1992-05-29 | 1993-12-09 | Anthony's Manufacturing Company, Inc. | Insulator for fluorescent lamp |
US5315211A (en) * | 1992-05-29 | 1994-05-24 | Anthony's Manufacturing Company, Inc. | Insulator for fluorescent lamp |
US5440467A (en) * | 1994-04-22 | 1995-08-08 | Steelcase Inc. | Task light |
US5536998A (en) * | 1994-11-28 | 1996-07-16 | Royal Lite Manufacturing And Supply Corp. | Fluorescent lamp with a protective assembly |
US5729085A (en) * | 1996-03-22 | 1998-03-17 | Royal Lite Manufacturing And Supply Corp. | Fluorescent lamp with a protective assembly |
US6632100B1 (en) | 1997-04-23 | 2003-10-14 | Anthony, Inc. | Lighting system method and apparatus socket assembly lamp insulator assembly and components thereof |
WO1999012185A1 (en) * | 1997-09-02 | 1999-03-11 | Sica Michael F | Shatter-resistant lamp assembly and method |
US6078136A (en) * | 1998-11-06 | 2000-06-20 | Royal Lite Manufacturing And Supply Corp. | Fluorescent lamp with a protective assembly having vent holes |
US6254318B1 (en) | 1998-12-16 | 2001-07-03 | Michael F. Sica | Apparatus for making numerous holes in a tube |
US6246167B1 (en) | 1999-06-29 | 2001-06-12 | Michael F. Sica | U-shaped fluorescent lamp with protective assembly |
US6422721B1 (en) | 2000-05-22 | 2002-07-23 | Genlyte Thomas Group Llc | Tube guard system |
US6452324B1 (en) * | 2000-08-30 | 2002-09-17 | General Electric Company | Fluorescent lamp for grocery lighting |
AT410992B (de) * | 2001-12-19 | 2003-09-25 | Ae Austria Aussenleuchten Und | Leuchte für den aussenbereich sowie ein thermoschutzrohr für diese leuchte |
US20060034087A1 (en) * | 2004-08-16 | 2006-02-16 | A.L.P. Lighting & Ceiling Products, Inc. | End cap for illumination tube guards |
US20080048541A1 (en) * | 2004-12-20 | 2008-02-28 | Sumrall Ernest N | Polymer-thermal shield for ultra-violet lamp |
GB2453929A (en) * | 2007-10-15 | 2009-04-29 | Anytronics Ltd | A coaxial spacer for a fluorescent lamp tube |
Also Published As
Publication number | Publication date |
---|---|
CA941433A (en) | 1974-02-05 |
JPS5111915Y2 (pt) | 1976-03-31 |
JPS46133U (pt) | 1971-12-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NORTH AMERICAN PHILIPS ELECTRIC CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WESTINGHOUSE ELECTRIC CORPORATION;REEL/FRAME:004113/0393 Effective date: 19830316 |