US3600064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable magnifier with a radioluminous light source
Assignee: 3M Co
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Filing: 1968-09-16
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Granted: 1971-08-17
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Expires: 1988-09-16
Abstract
Abstract Self-luminous portable magnifier comprising a radioluminous light source to illuminate and a lens to magnify visually recorded data to be read. The combination provides substantially uniform illumination of the magnified portion of the matter to be read.
Inventors
- 👤 Richard N Walz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:19
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A self-luminous portable magnifier comprising: a lens, a frame having a viewing aperture therethrough and supporting said lens in a position normal to and substantially coaxially with said aperture; and a radioluminous ring comprised of a radioisotope and a phosphor with a vehicle therefor, said ring being substantially coaxial to said frame and said lens, wherein the diameter of said ring is equal to the distance between said ring and the matter to Be viewed and equal to the focal length of said lens, thereby providing uniform illumination of the matter magnified by said lens.
Claim 2
Dependent Claim
95 words
A self-luminous portable magnifier comprising: a lens, a frame having a viewing aperture therethrough and supporting said lens in a position normal to and substantially coaxially with said aperture; and a radioluminous ring comprised of a radioisotope and a phosphor with a vehicle therefor, said ring being substantially coaxial to said frame and said lens, wherein the diameter of said ring is equal to the distance between said ring and the matter to Be viewed and equal to the focal length of said lens, thereby providing uniform illumination of the matter magnified by said lens.
Claim 3
Dependent Claim
13 words
The self-luminous portable magnifier of claim 1 wherein said radioisotope is a gas.
Claim 4
Dependent Claim
15 words
A self-luminous portable magnifier according to claim 1 having a shielding material around said frame.
Claim 5
Dependent Claim
19 words
A self-luminous portable magnifier of claim 1 having a movable cover over the top and bottom of said frame.
Claim 6
Dependent Claim
95 words
A self-luminous portable magnifier for the magnified viewing having a ring of radioluminescent material within a cylindrical frame containing an axial aperture therethrough and around a lens cemented to said frame wherein said radioluminous ring is cemented to a shoulder in a frame formed by the lamination of two rings of acrylic plastic material having unequal inner diameter, said lens and radioluminous ring being substantially coaxial to said frame and each other, said radioluminescent ring being of a diameter equal to the focal length of said lens, thereby providing uniform illumination of magnified subject matter.
Claim 7
Dependent Claim
95 words
A self-luminous portable magnifier for the magnified viewing having a ring of radioluminescent material within a cylindrical frame containing an axial aperture therethrough and around a lens cemented to said frame wherein said radioluminous ring is cemented to a shoulder in a frame formed by the lamination of two rings of acrylic plastic material having unequal inner diameter, said lens and radioluminous ring being substantially coaxial to said frame and each other, said radioluminescent ring being of a diameter equal to the focal length of said lens, thereby providing uniform illumination of magnified subject matter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |