CA1245274A - Porous nickel tubing having getter material therein for incandescent and discharge lamps - Google Patents
Porous nickel tubing having getter material therein for incandescent and discharge lampsInfo
- Publication number
- CA1245274A CA1245274A CA000478905A CA478905A CA1245274A CA 1245274 A CA1245274 A CA 1245274A CA 000478905 A CA000478905 A CA 000478905A CA 478905 A CA478905 A CA 478905A CA 1245274 A CA1245274 A CA 1245274A
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- CA
- Canada
- Prior art keywords
- lamp
- getter material
- nickel
- zirconium
- alloy
- 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.)
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Abstract
POROUS NICKEL TUBING HAVING GETTER MATERIAL
THEREIN FOR INCANDESCENT AND DISCHARGE LAMPS
Abstract of the Disclosure A getter device for use with incandescent and high intensity discharge lamps comprising nickel tubing sufficiently porous to allow gases to pass therethrough has getter material situated therein.
The nickel tubing can be used in place of support leads in high intensity discharge lamps or in place of lead-in wires in incandescent lamps. Alternatively the porous nickel tubing containing the getter material can be coiled around the support rods of the high intensity arc tube or the lead-in wires of an incandescent lamp adjacent the lamp filament.
THEREIN FOR INCANDESCENT AND DISCHARGE LAMPS
Abstract of the Disclosure A getter device for use with incandescent and high intensity discharge lamps comprising nickel tubing sufficiently porous to allow gases to pass therethrough has getter material situated therein.
The nickel tubing can be used in place of support leads in high intensity discharge lamps or in place of lead-in wires in incandescent lamps. Alternatively the porous nickel tubing containing the getter material can be coiled around the support rods of the high intensity arc tube or the lead-in wires of an incandescent lamp adjacent the lamp filament.
Description
~2~Z7~
, - 1 - RD-13,835 POROUS NICKEL TUBING ~VING GETTER MATERIAL
THE~EIN FO~ INCANDESCENT AND DISCHARGE LAMPS
Backqround of the Invention This invention relates to bulk getter mounting arrangements for high intensity discharge (HID) lamps and incandescent lamps.
In lamp assemblies having a glass envelope which contains a high efficiency arc discharge tube and filamentary resistance elements, such as the lamp shown and described in U.S. Patent 3,248,590 assigned to the instant assignee, a bulk getter is used in the reyion between the arc tube and the outer envelope.
This getter is needed in order to reduce the hydrogen pressure to a level near or below 1~ (10-3 Torr).
This low hydrogen partial pressure is necessary to prevent early burn out of the tungsten filamentary resistance elements, and to reduce hard starting of the arc discharge tube.
Lamp assemblies having a high efficiency arc discharge tube and filamentary resistance elements require more gettering than most incandescent or discharge lamps due to a glass shield around the arc discharge tube that operates at a very high temperature and thus evolves water continuously and the inner wall of the outer glass envelope cannot be completely degassed during the short bake cycles occurring during manufacture.
During lamp operation the tungsten filament is heated to a high temperature in order to provide light instantly when the lamp is first turned on. Later when the lamp warms up, the tungsten filament current decreases but the filament remains hot enough to react with any residual hydrogen or water present which could result in early burnout. Also, hydrogen diffuses readily through the hot quartz of the arc lamp. If the hydrogen partial pressure is near 50~ or , ~
~Z~5~4 RD-13,835 above, the arc lamp starting voltage increases and the lamp becomes hard to start. If this increased starting voltage exceeds the ballast voltage capability, the lamp will fail.
Presently-used getter material in lamps having a glass S envelope which contains a high efficiency arc discharge tube and filamentary resistance elements, is an alloy of 86%
zirconium and 14% aluminum sold by SAES Getters, Colorado Springs, Colorado under the designation STlO1. The powdered getter material is attached to a nic~el-coated iron ribbon and cut into small tabs about 0.5 cm2 in area. A getter tab is spot welded to an upper arc tube support on each lamp and is heated during normal lamp operation, by conduction and convection, to about 400C. The getter tab cannot be mounted in a position where the operating temperature is lS optimum without reducing light output. The getter presently used is adequate for base-down operating lamps. Euture universal operating position lamps will probably operate at a lower temperature, reducing the efficacy of the presently-used getter material.
Present incandescent lamps include a getter of powdered zirconium and aluminum which is painted directly on the filament support leads in slurry form. The slurrv comprises the powdered getter and a hydrocarbon binder such as nitrocellulose in a suitable solvent. The getter cleans up or adsorbs hydrogen from the lamp which is generated by the dissociation of water vapor by the heated filament. If the water vapor level is not controlled, tungsten from the filament is deposited on the glass envelope more rapidly than occurs when water vapor is not present and a shortened filament life results.
During the processing of the lamp, much of the nitrocellulose and solvent are decomposed and pumped away, leaving the powdered zirconium and alum~num attached to the filament support leads. Painting getter material directly on the filament support leads is satisfactory for lamps . ~2~74 RD-13,835 which do not require large amounts of gettering. Increasing the quantity of getter powder attached to the filament support leads is difficult because thic~er coatings tend to crack and fall off.
The quantity of getter powder put on the leads is difficult to control and reproducibility from lamp to lamp is not good. Some of the binder remains in the getter and is evolved after lamp seal of~, resulting in a high hydrocarbon atmosphere which reduces filament life. The zirconium plus aluminum powder requires a temperature near or above 500C for significant gettering of hydrogen.
It is an object of the present invention to provide a getter mount and getter materials which will exhibit satis-factory gettering at temperature below 400C and have low cost.
It is a further object of -the present invention to provide a getter mount arrangement which can be mounted in a position where the operating temperature is optimum without reducing the lamp light output.
SummarY of the Invention In one embodiment of the present invention an evacuable envelope containing a light-emitting element is provided.
Nic~el tubing sufficiently porous to allow gases to pass therethrough, and with getter material situated therein, is electrically and mechanically coupled to lead-in wires of the light-emitting element to provide support and electrical current to the light-emitting element as well as a getter mounting arrangement. In both the aforementioned embodiments, the light-emitting element may comprise an arc discharge tube or a filament.
In another embodiment of the present invention, a lamp comprising an arc discharge tube having lead-in wires situated in an evacuable envelope is provided. Support rods affixed to the lead-in wires provide support and electrical : ~2~7~ RD-13,835 current to the arc discharge tube. Nickel tubing, suffi-ciently porous to allow gases to pass therethrough, and with getter macerial situated therein, is wrapped around at least one o~ the support rods adjacent to the arc tube.
In yet another embodiment of the present invention an incandescent lamp comprising a filament supported by lead-in wires within an evacuable envelope is provided. Nickel tubing, sufficiently porous to allow gases to pass therethrough, and with getter material situated therein, is wrapped around at least one of the lead-in wires adjacent the filament.
Description of the Drawing While the specification concludes with claims particu-larly pointing out and distinctly claiming the present invention, the objects and advantages of the invention can be more readily ascertained from the following description of preferred embodiments when used in conjunction with the accompanying drawing in which:
Figure 1 is a partially cut away side view of a mul-ti-vapor lamp including filamentary resistance elements and a bulk getter in accordance with the present invention;
Figure 2 is a partially cut away side view of a mul-ti-vapor lamp including filamentary resistance elements and a bulk getter in accordance with another embodiment of the present invention;
Figure 3 is a side view of an incandescent lamp with a bulk getter in accordance with the present invention; and Figure 4 is a side view of an incandescent lamp with a bulk getter in accordance with another embodiment of the present invention.
Detailed Description of the Invention ~ eferring now to the drawing wherein like numerals indicate liXe elements throughout, there is shown in Figure 1, a high intensity discharge lamp assembly comprising a glass enclosure, which contains a high efficiency arc _g_ ~
~Z~527~ RD- 13, 8 3 5 discharge lamp 5 and filamentary resistance elements 7 and 9. A suitable light source for use as the arc discharge tube is a high pressure discharge lamp that operates by vaporizing mercury and selected me-tal halides. A high pressure discharge tube of this type is more fully described in United States patent 4,161,672 assigned to the instant assignee. - ~
The arc discharge tube 5 is suspended between a long support rod 11 and short support rod 13 which are both elec-trically connected by spot welding, for example, to lead-in wires 15 of the arc discharge tube. The arc discharge tube is surrounded by a glass shield la. The support rods 11 and 13 comprise nickel tubing sufficiently porous to allow gases to pass therethrough, and have getter material situated therein.
The nickel tubing can be formed, for example, by powdered nickeL which is extruded in tube form having a ~0 mill outside diameter. The porosity of the nickel tubing can be controlled by varying the pressure, temperature and particle size in forming the tube. Alternatively, porous nickel tubing can be extruded from nickel fiber mat material which is made by extruding nickel oxides and reducing the oxides to form fibers and arranging the fibers to form a fiber mat. Nickel fiber mats are available from Nation-al-Standard of Niles, Michigan under the trademark "Fibrex-SCM". Raney nickel which comprises approximately 50% nickel and 50% aluminum can be used to make porous nickel tubing by extruding the Raney nickel to form a tube and then etching the aluminum away using a concentrated NaOH
solution. The porous nickel tubing has its interior portion filled with getter powder such as an alloy of ~5% zirconium, 10% titanium, and 5% nickel or ~35% ~irconium, 7% iron and 8%
aluminum. The percent of titanium, nick-l, iron and alumi-num may be adjusted by increasing or decreasing the amounts of any of the constituents, individually or in combination, 7~
RD-13,835 by between 1 and 14%. The filled tubing can then be sintered in a vacuum at about 750C. After sintering, the getter-filled porous nickel tubing can be handled and formed much like wire or ribbon.
The resistance elements 7 and 9 are an electrical part of the power supply, being used to ballast the arc dis-charge lamp 5 and serving as supplemental light sources.
A power supply unit includes a rigid case 19 attached to the glass enclosure 3 and a screw-in base 20. The unit develops the required energization of the arc discharge lamp during starting and operating conditions and produces instant illumination by use of the supplemental light source 9. The supplemental illumination is relatively constant during starting, tapering off as the arc lamp warms up.
The lighting unit is more fully described in the United States Patent No. 4,350,930, issued September 21, 1982 to Peil et al and assigned to the instant assignee.
The bulk getter powder is preferably heated to 250C-450C for maximum gettering speed. The porous nickel tube permits easy access of impurity gases, mainly hydrogen, to the getter powder. Conduction heating from the arc discharge tube lead-in wires provides most of the heat during lamp operation. Depending on the orientation of the lamp (base up, base down, or horizontal) the bulk getter in
, - 1 - RD-13,835 POROUS NICKEL TUBING ~VING GETTER MATERIAL
THE~EIN FO~ INCANDESCENT AND DISCHARGE LAMPS
Backqround of the Invention This invention relates to bulk getter mounting arrangements for high intensity discharge (HID) lamps and incandescent lamps.
In lamp assemblies having a glass envelope which contains a high efficiency arc discharge tube and filamentary resistance elements, such as the lamp shown and described in U.S. Patent 3,248,590 assigned to the instant assignee, a bulk getter is used in the reyion between the arc tube and the outer envelope.
This getter is needed in order to reduce the hydrogen pressure to a level near or below 1~ (10-3 Torr).
This low hydrogen partial pressure is necessary to prevent early burn out of the tungsten filamentary resistance elements, and to reduce hard starting of the arc discharge tube.
Lamp assemblies having a high efficiency arc discharge tube and filamentary resistance elements require more gettering than most incandescent or discharge lamps due to a glass shield around the arc discharge tube that operates at a very high temperature and thus evolves water continuously and the inner wall of the outer glass envelope cannot be completely degassed during the short bake cycles occurring during manufacture.
During lamp operation the tungsten filament is heated to a high temperature in order to provide light instantly when the lamp is first turned on. Later when the lamp warms up, the tungsten filament current decreases but the filament remains hot enough to react with any residual hydrogen or water present which could result in early burnout. Also, hydrogen diffuses readily through the hot quartz of the arc lamp. If the hydrogen partial pressure is near 50~ or , ~
~Z~5~4 RD-13,835 above, the arc lamp starting voltage increases and the lamp becomes hard to start. If this increased starting voltage exceeds the ballast voltage capability, the lamp will fail.
Presently-used getter material in lamps having a glass S envelope which contains a high efficiency arc discharge tube and filamentary resistance elements, is an alloy of 86%
zirconium and 14% aluminum sold by SAES Getters, Colorado Springs, Colorado under the designation STlO1. The powdered getter material is attached to a nic~el-coated iron ribbon and cut into small tabs about 0.5 cm2 in area. A getter tab is spot welded to an upper arc tube support on each lamp and is heated during normal lamp operation, by conduction and convection, to about 400C. The getter tab cannot be mounted in a position where the operating temperature is lS optimum without reducing light output. The getter presently used is adequate for base-down operating lamps. Euture universal operating position lamps will probably operate at a lower temperature, reducing the efficacy of the presently-used getter material.
Present incandescent lamps include a getter of powdered zirconium and aluminum which is painted directly on the filament support leads in slurry form. The slurrv comprises the powdered getter and a hydrocarbon binder such as nitrocellulose in a suitable solvent. The getter cleans up or adsorbs hydrogen from the lamp which is generated by the dissociation of water vapor by the heated filament. If the water vapor level is not controlled, tungsten from the filament is deposited on the glass envelope more rapidly than occurs when water vapor is not present and a shortened filament life results.
During the processing of the lamp, much of the nitrocellulose and solvent are decomposed and pumped away, leaving the powdered zirconium and alum~num attached to the filament support leads. Painting getter material directly on the filament support leads is satisfactory for lamps . ~2~74 RD-13,835 which do not require large amounts of gettering. Increasing the quantity of getter powder attached to the filament support leads is difficult because thic~er coatings tend to crack and fall off.
The quantity of getter powder put on the leads is difficult to control and reproducibility from lamp to lamp is not good. Some of the binder remains in the getter and is evolved after lamp seal of~, resulting in a high hydrocarbon atmosphere which reduces filament life. The zirconium plus aluminum powder requires a temperature near or above 500C for significant gettering of hydrogen.
It is an object of the present invention to provide a getter mount and getter materials which will exhibit satis-factory gettering at temperature below 400C and have low cost.
It is a further object of -the present invention to provide a getter mount arrangement which can be mounted in a position where the operating temperature is optimum without reducing the lamp light output.
SummarY of the Invention In one embodiment of the present invention an evacuable envelope containing a light-emitting element is provided.
Nic~el tubing sufficiently porous to allow gases to pass therethrough, and with getter material situated therein, is electrically and mechanically coupled to lead-in wires of the light-emitting element to provide support and electrical current to the light-emitting element as well as a getter mounting arrangement. In both the aforementioned embodiments, the light-emitting element may comprise an arc discharge tube or a filament.
In another embodiment of the present invention, a lamp comprising an arc discharge tube having lead-in wires situated in an evacuable envelope is provided. Support rods affixed to the lead-in wires provide support and electrical : ~2~7~ RD-13,835 current to the arc discharge tube. Nickel tubing, suffi-ciently porous to allow gases to pass therethrough, and with getter macerial situated therein, is wrapped around at least one o~ the support rods adjacent to the arc tube.
In yet another embodiment of the present invention an incandescent lamp comprising a filament supported by lead-in wires within an evacuable envelope is provided. Nickel tubing, sufficiently porous to allow gases to pass therethrough, and with getter material situated therein, is wrapped around at least one of the lead-in wires adjacent the filament.
Description of the Drawing While the specification concludes with claims particu-larly pointing out and distinctly claiming the present invention, the objects and advantages of the invention can be more readily ascertained from the following description of preferred embodiments when used in conjunction with the accompanying drawing in which:
Figure 1 is a partially cut away side view of a mul-ti-vapor lamp including filamentary resistance elements and a bulk getter in accordance with the present invention;
Figure 2 is a partially cut away side view of a mul-ti-vapor lamp including filamentary resistance elements and a bulk getter in accordance with another embodiment of the present invention;
Figure 3 is a side view of an incandescent lamp with a bulk getter in accordance with the present invention; and Figure 4 is a side view of an incandescent lamp with a bulk getter in accordance with another embodiment of the present invention.
Detailed Description of the Invention ~ eferring now to the drawing wherein like numerals indicate liXe elements throughout, there is shown in Figure 1, a high intensity discharge lamp assembly comprising a glass enclosure, which contains a high efficiency arc _g_ ~
~Z~527~ RD- 13, 8 3 5 discharge lamp 5 and filamentary resistance elements 7 and 9. A suitable light source for use as the arc discharge tube is a high pressure discharge lamp that operates by vaporizing mercury and selected me-tal halides. A high pressure discharge tube of this type is more fully described in United States patent 4,161,672 assigned to the instant assignee. - ~
The arc discharge tube 5 is suspended between a long support rod 11 and short support rod 13 which are both elec-trically connected by spot welding, for example, to lead-in wires 15 of the arc discharge tube. The arc discharge tube is surrounded by a glass shield la. The support rods 11 and 13 comprise nickel tubing sufficiently porous to allow gases to pass therethrough, and have getter material situated therein.
The nickel tubing can be formed, for example, by powdered nickeL which is extruded in tube form having a ~0 mill outside diameter. The porosity of the nickel tubing can be controlled by varying the pressure, temperature and particle size in forming the tube. Alternatively, porous nickel tubing can be extruded from nickel fiber mat material which is made by extruding nickel oxides and reducing the oxides to form fibers and arranging the fibers to form a fiber mat. Nickel fiber mats are available from Nation-al-Standard of Niles, Michigan under the trademark "Fibrex-SCM". Raney nickel which comprises approximately 50% nickel and 50% aluminum can be used to make porous nickel tubing by extruding the Raney nickel to form a tube and then etching the aluminum away using a concentrated NaOH
solution. The porous nickel tubing has its interior portion filled with getter powder such as an alloy of ~5% zirconium, 10% titanium, and 5% nickel or ~35% ~irconium, 7% iron and 8%
aluminum. The percent of titanium, nick-l, iron and alumi-num may be adjusted by increasing or decreasing the amounts of any of the constituents, individually or in combination, 7~
RD-13,835 by between 1 and 14%. The filled tubing can then be sintered in a vacuum at about 750C. After sintering, the getter-filled porous nickel tubing can be handled and formed much like wire or ribbon.
The resistance elements 7 and 9 are an electrical part of the power supply, being used to ballast the arc dis-charge lamp 5 and serving as supplemental light sources.
A power supply unit includes a rigid case 19 attached to the glass enclosure 3 and a screw-in base 20. The unit develops the required energization of the arc discharge lamp during starting and operating conditions and produces instant illumination by use of the supplemental light source 9. The supplemental illumination is relatively constant during starting, tapering off as the arc lamp warms up.
The lighting unit is more fully described in the United States Patent No. 4,350,930, issued September 21, 1982 to Peil et al and assigned to the instant assignee.
The bulk getter powder is preferably heated to 250C-450C for maximum gettering speed. The porous nickel tube permits easy access of impurity gases, mainly hydrogen, to the getter powder. Conduction heating from the arc discharge tube lead-in wires provides most of the heat during lamp operation. Depending on the orientation of the lamp (base up, base down, or horizontal) the bulk getter in
2~ one or the other or both of the support rods will be heated to the proper operating temperature. The bulk getter getters mainly hydrogen during lamp operation to prevent early burnout of the tungsten filament, and prevents hard starting of the arc discharge tube.
Figure 2 shows another embodiment of the present invention for use with a high intensity discharge tube in an evacuated envelope. The lamp shown is the same type as shown in Figure 1, except that the support rods lla and 13a are not porous nickel tubes but support rods of the type conventionally used. Porous nickel tubing 16 filled with ~ RD-13,835 getter powder, as described in connection with Figure 1, ls coiled around support rod lla near the end of the arc discharge tube where it is heated to 250-450C during lamp operation. While the invention has been shown with high intensity discharge lamps with filamentary resistance elements between the outer envelope and the arc discharge tube, the getter of the present invention can be used in high intensity discharge lamps without filamentary resis-tance elements.
Referring now to Figure 3 an incandescent lamp assembly comprising a glass enclosure 21, lead-in wires 23 attached to a filament 25, and a glass support stem 27 through which the lead-in wires extend, is shown. The support stem seals the bottom of the glass enclosure 21. Nonconductive cross support member 26 maintains the spacing between lead-in wires 23, and a support member 28 attached to the support stem 27 restricts motion of the filament 25. A screw-in base 29 is cemented to the base of the glass enclosure 21 and is electrically connected to the lead-in wires. The lead-in wires comprise porous nickel tubing filled with getter powder of the type described in connection with Fig.
1.
Referring now to Fig. 4 an incandescent lamp assembly of the type shown in Fig. 3 is shown except that the lead-in wires 23a are conventional lead-in wires. Porous nic~el tubing 16 filled with getter material is coiled around the support leads adjacent the filament where they are heated to 250-450C during lamp operation by conduction, convection and radiation from the filament to provide ge-ttering.
The foregoing describes a getter device which allows operation below 400C and which can be mounted in a position where the operating temperature is optimum without reducing the lamp output.
While the invention has been particularly shown and described with reference to several preferred embodiments 2~74 : RD-13,835 thereof, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.
Figure 2 shows another embodiment of the present invention for use with a high intensity discharge tube in an evacuated envelope. The lamp shown is the same type as shown in Figure 1, except that the support rods lla and 13a are not porous nickel tubes but support rods of the type conventionally used. Porous nickel tubing 16 filled with ~ RD-13,835 getter powder, as described in connection with Figure 1, ls coiled around support rod lla near the end of the arc discharge tube where it is heated to 250-450C during lamp operation. While the invention has been shown with high intensity discharge lamps with filamentary resistance elements between the outer envelope and the arc discharge tube, the getter of the present invention can be used in high intensity discharge lamps without filamentary resis-tance elements.
Referring now to Figure 3 an incandescent lamp assembly comprising a glass enclosure 21, lead-in wires 23 attached to a filament 25, and a glass support stem 27 through which the lead-in wires extend, is shown. The support stem seals the bottom of the glass enclosure 21. Nonconductive cross support member 26 maintains the spacing between lead-in wires 23, and a support member 28 attached to the support stem 27 restricts motion of the filament 25. A screw-in base 29 is cemented to the base of the glass enclosure 21 and is electrically connected to the lead-in wires. The lead-in wires comprise porous nickel tubing filled with getter powder of the type described in connection with Fig.
1.
Referring now to Fig. 4 an incandescent lamp assembly of the type shown in Fig. 3 is shown except that the lead-in wires 23a are conventional lead-in wires. Porous nic~el tubing 16 filled with getter material is coiled around the support leads adjacent the filament where they are heated to 250-450C during lamp operation by conduction, convection and radiation from the filament to provide ge-ttering.
The foregoing describes a getter device which allows operation below 400C and which can be mounted in a position where the operating temperature is optimum without reducing the lamp output.
While the invention has been particularly shown and described with reference to several preferred embodiments 2~74 : RD-13,835 thereof, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.
Claims (15)
1. a lamp comprising:
an evacuable envelope;
nickel tubing sufficiently porous to allow gases to pass therethrough;
getter material situated inside said tubing;
a light emitting element situated in said evacuable envelope and in heating proximity with said getter material;
lead-in wires electrically coupled to said light-emitting element, said nickel tubing electrically coupled to at least one of said lead-in wires for providing support and capable of providing electrical current to the light-emitting element as well as providing a getter mounting arrangement.
an evacuable envelope;
nickel tubing sufficiently porous to allow gases to pass therethrough;
getter material situated inside said tubing;
a light emitting element situated in said evacuable envelope and in heating proximity with said getter material;
lead-in wires electrically coupled to said light-emitting element, said nickel tubing electrically coupled to at least one of said lead-in wires for providing support and capable of providing electrical current to the light-emitting element as well as providing a getter mounting arrangement.
2. The lamp of claim 1 wherein said getter material comprises an alloy of 85% zirconium, 10% titanium and 5%
nickel.
nickel.
3. The lamp of claim 1 wherein said getter material comprises an alloy of 85% zirconium, 7% iron and 8%
aluminum.
aluminum.
4. The lamp of claim 1 wherein said lamp is a high intensity discharge lamp and said light emitting element is an arc discharge tube.
5. The lamp of claim 4 wherein said getter material comprises an alloy of 85% zirconium, 10% titanium and 5%
nickel.
nickel.
6. The lamp of claim 4 wherein said getter material comprises an alloy of 85% zirconium, 7% iron and 8%
aluminum.
aluminum.
7. The lamp of claim 1 wherein said lamp is an incandescent lamp and said light emitting element comprises a filament.
8. The lamp of claim 7 wherein said getter material comprises an alloy of 85% zirconium, 10% titanium and 5%
nickel.
nickel.
9. The lamp of claim 7 wherein said getter material comprises an alloy of 85% zirconium, 7% iron and 8% alumi-num.
10. A high intensity discharge lamp comprising:
an evacuable envelope;
support rods;
nickel tubing sufficiently porous to allow gases to pass therethrough;
getter material situated inside said tubing;
an arc discharge tube situated in said evacuable envelope;
and lead-in wires electrically coupled to said arc discharge tube, said support rods affixed to said lead-in wires and extending outside the evacuable envelope said nickel tubing wrapped around at least one of said support rods adjacent to said arc discharge tube.
an evacuable envelope;
support rods;
nickel tubing sufficiently porous to allow gases to pass therethrough;
getter material situated inside said tubing;
an arc discharge tube situated in said evacuable envelope;
and lead-in wires electrically coupled to said arc discharge tube, said support rods affixed to said lead-in wires and extending outside the evacuable envelope said nickel tubing wrapped around at least one of said support rods adjacent to said arc discharge tube.
11. The high intensity discharge lamp of claim 10 wherein said getter material comprises an alloy of 85%
zirconium, 10% titanium and 5% nickel.
zirconium, 10% titanium and 5% nickel.
12. The high intensity discharge lamp of claim 10 wherein said getter material comprises an alloy of 85%
zirconium, 7% iron and 8% aluminum.
zirconium, 7% iron and 8% aluminum.
13. A incandescent lamp comprising:
an evacuable envelope;
nickel tubing sufficiently porous to allow gases to pass therethrough;
getter material situated inside said tubing;
a filament; and support wires electrically coupled to said fila-ment for providing support and capable of providing elec-trical current to said filament, said nickel tubing wrapped around at least one of said support wires adjacent said filament.
an evacuable envelope;
nickel tubing sufficiently porous to allow gases to pass therethrough;
getter material situated inside said tubing;
a filament; and support wires electrically coupled to said fila-ment for providing support and capable of providing elec-trical current to said filament, said nickel tubing wrapped around at least one of said support wires adjacent said filament.
14. The lamp of claim 12 wherein said getter material comprises an alloy of 85% zirconium, 10% titanium and 5% nickel.
15. The lamp of claim 13 wherein said getter material comprises an alloy of 85% zirconium, 7% iron and 8%
aluminum.
aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000478905A CA1245274A (en) | 1985-04-11 | 1985-04-11 | Porous nickel tubing having getter material therein for incandescent and discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000478905A CA1245274A (en) | 1985-04-11 | 1985-04-11 | Porous nickel tubing having getter material therein for incandescent and discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1245274A true CA1245274A (en) | 1988-11-22 |
Family
ID=4130243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000478905A Expired CA1245274A (en) | 1985-04-11 | 1985-04-11 | Porous nickel tubing having getter material therein for incandescent and discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1245274A (en) |
-
1985
- 1985-04-11 CA CA000478905A patent/CA1245274A/en not_active Expired
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