US3869614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphor assembly for ultraviolet light absorption detector
Assignee: Varian Medical Systems Inc
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Filing: 1973-03-16
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Granted: 1975-03-04
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Expires: 1993-03-16
Abstract
Abstract An inert phosphor package or enclosure assembly, especially for use with an ultraviolet light absorption detector in liquid chromatography, and a process for manufacture. A wave length converting phosphor for location in a lamp housing is protected from the surrounding environment and abrasion by an encapsulating container comprised of a rigid base with a phosphor receptacle or pocket, a protective cover or window over the pocket transparent to ultraviolet radiation, and a heat-fused seal between the window and base. The package is fabricated by filling the pocket with a phosphor powder, covering the powder with the window, applying a fusible sealing strip, heating the assembly to a first temperature to dry the phosphor without fusing the sealing strip, and heating to a higher temperature without intermediate cooling to seal the window to the base.
Inventors
- 👤 Miner N Munk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:58
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/58; F; F21; F21K; F21K2/00; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1454; F02D41/1456
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
IN A METHOD OF MAKING A SEALED PHOSPHOR ASSEMBLY, THE STEPS COMPRISING: PLACING LOOSE PARTICULATE PHOSPHOR IN A CAVITY OF A BASE IN AN AMOUNT SUFFICIENT TO FILL THE CAVITY, COVERING THE CAVITY WITH A MATERIAL SUBSTANTIALLY TRANSPARENT TO ELECTROMAGNETIC RADIATION OF AT LEAST CERTAIN TRANSPARENT TO ELECTROMAGNETIC RADIATION OF AT LEAST CERTAIN WAVE LENGTHS, HEATING THE ASSEMBLED BASE, PHOSPHOR AND COVERING MATERIAL
Claim 2
Dependent Claim
63 words
IN A METHOD OF MAKING A SEALED PHOSPHOR ASSEMBLY, THE STEPS COMPRISING: PLACING LOOSE PARTICULATE PHOSPHOR IN A CAVITY OF A BASE IN AN AMOUNT SUFFICIENT TO FILL THE CAVITY, COVERING THE CAVITY WITH A MATERIAL SUBSTANTIALLY TRANSPARENT TO ELECTROMAGNETIC RADIATION OF AT LEAST CERTAIN TRANSPARENT TO ELECTROMAGNETIC RADIATION OF AT LEAST CERTAIN WAVE LENGTHS, HEATING THE ASSEMBLED BASE, PHOSPHOR AND COVERING MATERIAL
Claim 3
Dependent Claim
74 words
A method as set forth in claim 1, wherein the covering material is a quartz window, and the phosphor is dried and the covering material is sealed to the base by placing a heat-fusible sealant about the cavity between the base and window and heating the base, phosphor, window and sealant first to a drying temperature below the fusion temperature of the sealant and then subsequently to a temperature at which the sealant fuses.
Claim 4
Dependent Claim
25 words
A method as set forth in claim 2, wherein the temperature is raised to fuse the sealant without lowering the temperature below the drying temperature.
Claim 5
Dependent Claim
119 words
A sealed wave length-converting phosphor assembly for use in an ultraviolet radiation detector, comprised of a base for attachment of the assembly to a support, a phosphor receptacle formed in said base, a phosphor in particulate form in said receptacle, a cover over said receptacle and phosphor, retaining the phosphor in the receptacle, protecting the phosphor from moisture and abrasion, and substantially transparent to ultraviolet radiation, said base includes a ledge about said receptacle forming a seat for the cover, and a rim about the ledge for locating the cover, the area circumscribed by said rim being greater than the area of said cover, and means surrounding said receptacle forming an hermetic seal between said rim and said cover.
Claim 6
Dependent Claim
119 words
A sealed wave length-converting phosphor assembly for use in an ultraviolet radiation detector, comprised of a base for attachment of the assembly to a support, a phosphor receptacle formed in said base, a phosphor in particulate form in said receptacle, a cover over said receptacle and phosphor, retaining the phosphor in the receptacle, protecting the phosphor from moisture and abrasion, and substantially transparent to ultraviolet radiation, said base includes a ledge about said receptacle forming a seat for the cover, and a rim about the ledge for locating the cover, the area circumscribed by said rim being greater than the area of said cover, and means surrounding said receptacle forming an hermetic seal between said rim and said cover.
Claim 7
Dependent Claim
102 words
A sealed wave length-converting phosphor assembly for use in an ultraviolet radiation detector, comprising a metal base for attachment of said phosphor assembly to a support, a phosphor receptacle formed in said base, a phosphor in particulate form in said receptacle, a fused silica cover over said receptacle and phosphor, said cover serving to retain the phosphor in the receptacle and to protect the phosphor from moisture and abrasion, said cover being substantially transparent to ultraviolet radiation, and fluorinated ethylene propylene sealing means disposed along a continuous path surrounding said receptacle to form an hermetic seal between the base and the cover.
Claim 8
Dependent Claim
102 words
A sealed wave length-converting phosphor assembly for use in an ultraviolet radiation detector, comprising a metal base for attachment of said phosphor assembly to a support, a phosphor receptacle formed in said base, a phosphor in particulate form in said receptacle, a fused silica cover over said receptacle and phosphor, said cover serving to retain the phosphor in the receptacle and to protect the phosphor from moisture and abrasion, said cover being substantially transparent to ultraviolet radiation, and fluorinated ethylene propylene sealing means disposed along a continuous path surrounding said receptacle to form an hermetic seal between the base and the cover.
Claim 9
Dependent Claim
44 words
The assembly of claim 5 wherein said base comprises a ledge about said receptacle forming a seat for the cover, and a rim about the ledge for locating the cover, the area circumscribed by said rim being greater than the area of said cover.
Claim 10
Dependent Claim
87 words
In an ultraviolet radiation detector for use in chromatography, an ultraviolet wave length-converting phosphor powder enclosed within and filling a dry closed hermetically-sealed chamber, said chamber being formed by a base member having a cavity and by a cover member over said cavity, said base member comprising a ledge about the perimeter of said cavity, said ledge forming a seat for said cover member, said base member and said cover member defining the chamber filled by said phosphor powder, said cover member being transparent to ultraviolet radiation.
Claim 11
Dependent Claim
87 words
In an ultraviolet radiation detector for use in chromatography, an ultraviolet wave length-converting phosphor powder enclosed within and filling a dry closed hermetically-sealed chamber, said chamber being formed by a base member having a cavity and by a cover member over said cavity, said base member comprising a ledge about the perimeter of said cavity, said ledge forming a seat for said cover member, said base member and said cover member defining the chamber filled by said phosphor powder, said cover member being transparent to ultraviolet radiation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |