Patent US2890458A successfully refreshed from Google Patents.
Patent US3988263A successfully refreshed from Google Patents.
Patent US3428385A successfully refreshed from Google Patents.
Patent US3842281A successfully refreshed from Google Patents.
US3842281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterfeit document detector
Assignee: Individual
•
Filing: 1973-02-05
•
Granted: 1974-10-15
•
Expires: 1993-02-05
Abstract
Abstract A housing has a structural portion which forms a light shield and another structural portion adjacent to the light shield which forms an easel suitable for supporting a document to be verified such as currency. An ultraviolet lamp is mounted behind the light shield such that the ultraviolet energy therefrom strikes the currency. Counterfeit currency is readily detected by virtue of a characteristic blue glow that it gives off.
Inventors
- 👤 R Goodrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:06
CPC Classifications
G; G07; G07D; G07D7/00; G07D7/06; G07D7/12; G07D7/128
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A device for checking the validity of a document comprising: a casing having a first portion thereof shaped to form a light shield, and a second portion thereof shaped to form an easel for supporting a document to be examined, an ultraviolet lamp mounted in said casing adjacent to and behind said light shield, said light shield having a part thereof which wraps around said lamp, said easel portion extending at a slant angle from opposite said lamp away from the lamp to a line above the edge of the wraparound part of said light shield, said light shield directing the light from said lamp towards said easel portion, and means for selectively energizing said ultraviolet lamp, whereby a document to be examined can be placed on said easel such that the bottom portions thereof lie opposite said lamp and shielded by said light shield to receive a substantial portion of the light output of the lamp, yet viewable from above.
Claim 2
Independent Claim
161 words
A device for checking the validity of a document comprising: a casing having a first portion thereof shaped to form a light shield, and a second portion thereof shaped to form an easel for supporting a document to be examined, an ultraviolet lamp mounted in said casing adjacent to and behind said light shield, said light shield having a part thereof which wraps around said lamp, said easel portion extending at a slant angle from opposite said lamp away from the lamp to a line above the edge of the wraparound part of said light shield, said light shield directing the light from said lamp towards said easel portion, and means for selectively energizing said ultraviolet lamp, whereby a document to be examined can be placed on said easel such that the bottom portions thereof lie opposite said lamp and shielded by said light shield to receive a substantial portion of the light output of the lamp, yet viewable from above.
Claim 3
Dependent Claim
48 words
The device of claim 1 wherein said light shield extends along a front edge of said casing and said easel includes a flat, front portion positioned opposite said light shield and slanted away from said shield and the back portion which forms the rear wall of the casing.
Claim 4
Dependent Claim
19 words
The device of claim 1 and further including end plates removably attached to the opposite ends of said casing.
Claim 5
Dependent Claim
47 words
The device of claim 1 wherein said means for selectively energizing said lamp comprises a poweR line, a transformer mounted in said casing beneath said easel, and an electrical switch mounted in one of said end plates for connecting power from said power line to said transformer.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |