US4458993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fingerprint comparator
Assignee: Individual
•
Filing: 1981-10-05
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Granted: 1984-07-10
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Expires: 2001-10-05
Abstract
Abstract A fingerprint comparator includes a projection system including a source of light and a carrier for mounting samples of prints to be compared with an optical system for projecting the images of the samples side-by-side on a screen with one image reverted and the screen divided with the images being movable toward and from the dividing line appearing to merge and emerge from the central dividing line for a precise adjacent comparison at the dividing line. An alternate embodiment uses a split video screen and provides for remote transmission of either the record or sample print.
Inventors
- 👤 Paul S. Kempf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:46
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/08; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G07C9/253
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
An apparatus for displaying adjacent images from samples of fingerprints to be compared, said apparatus comprising a housing: a source of light mounted withint said housing; carrier means mounted to said housing for reciprocating sliding motion with respect thereto, said carrier means being formed with two fingerprint sample receiving portions, at least one said receiving portion being light transparent; means for mounting fingerprint samples to said sample receiving portions of said carrier means; a screen upon which images of said fingerprint samples are projected; means for reverting one of the images of said fingerprint samples for projecting said image as a mirror image, said reverting means comprising a single reflective element having two reflecting surfaces disposed at an angle to one another and joined at a common line; and optical means for projecting said images in side-by-side relationship on said screen, one of said images being the mirror image of the other whereby when said carrier means is moved
Claim 2
Independent Claim
159 words
An apparatus for displaying adjacent images from samples of fingerprints to be compared, said apparatus comprising a housing: a source of light mounted withint said housing; carrier means mounted to said housing for reciprocating sliding motion with respect thereto, said carrier means being formed with two fingerprint sample receiving portions, at least one said receiving portion being light transparent; means for mounting fingerprint samples to said sample receiving portions of said carrier means; a screen upon which images of said fingerprint samples are projected; means for reverting one of the images of said fingerprint samples for projecting said image as a mirror image, said reverting means comprising a single reflective element having two reflecting surfaces disposed at an angle to one another and joined at a common line; and optical means for projecting said images in side-by-side relationship on said screen, one of said images being the mirror image of the other whereby when said carrier means is moved
Claim 3
Dependent Claim
19 words
The apparatus of claim 1 wherein said fingerprint samples are transparent backing members having an opaque print image thereon.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1 wherein said screen is a back projection screen, and wall means separates said optical paths adjacent said screen.
Claim 5
Dependent Claim
19 words
The apparatus recited in claim 1 wherein one said reflective surface is angularly adjustable with respect to the other.
Claim 6
Independent Claim
185 words
An apparatus for displaying adjacent images from samples of fingerprints to be compared, said apparatus comprising; a housing; a source of light mounted within said housing; carrier means mounted to said housing for reciprocating sliding motion with respect thereto, said carrier means being formed with two fingerprint sample receiving portions, at least one said receiving portion being light transparent; means for mounting fingerprint samples to said sample receiving portions of said carrier means; a screen upon which images of said fingerprint samples are projected; means for reverting one of the images of said fingerprint samples for projecting said image as a mirror image; said reverting means comprises an integral corner mirror wherein the adjacent mirror surfaces are disposed at right angles to one another, each side of said mirror reflecting and reversing one half of the image onto the other side; and optical means for projecting said images in side-by-side image of the other whereby when said carrier means is moved laterally, the images on said screen move toward and away from each other and merge and emerge at a common line between the images.
Claim 7
Independent Claim
185 words
An apparatus for displaying adjacent images from samples of fingerprints to be compared, said apparatus comprising; a housing; a source of light mounted within said housing; carrier means mounted to said housing for reciprocating sliding motion with respect thereto, said carrier means being formed with two fingerprint sample receiving portions, at least one said receiving portion being light transparent; means for mounting fingerprint samples to said sample receiving portions of said carrier means; a screen upon which images of said fingerprint samples are projected; means for reverting one of the images of said fingerprint samples for projecting said image as a mirror image; said reverting means comprises an integral corner mirror wherein the adjacent mirror surfaces are disposed at right angles to one another, each side of said mirror reflecting and reversing one half of the image onto the other side; and optical means for projecting said images in side-by-side image of the other whereby when said carrier means is moved laterally, the images on said screen move toward and away from each other and merge and emerge at a common line between the images.
Claim 8
Dependent Claim
19 words
The apparatus recited in claim 5 wherein one said reflective surface is angularly adjustable with respect to the other.
Claim 9
Dependent Claim
19 words
The apparatus of claim 5 wherein said fingerprint samples are transparent backing member having an opaque print image thereon.
Claim 10
Dependent Claim
14 words
The apparatus of claim 5 wherein said mirrors are mounted in an adjustable fixture.
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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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |