US3609035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for recording characters or symbols in a reproducibly indiscernible manner
Assignee: Ricoh Co Ltd
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Filing: 1969-12-17
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Granted: 1971-09-28
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Expires: 1989-12-17
Abstract
Abstract A method and device for recording characters or symbols in a reproducibly indiscernible manner, in which adjacent to a lens plate having a plurality of lenses is disposed a key pattern plate having at least one light shielding portion which covers some of the lenses of said lens plate and the remaining portion of said key pattern plate made transparent when a camouflaging or concealing original or object is recorded; thereafter, a true original is recorded without said key pattern plate, thereby forming a camouflaged or concealing photograph; and to read out or reproduce the camouflaged photograph, instead of said key pattern plate is disposed a decoding plate having the light shielding and transparent portions complementary to those of said key pattern plate when said camouflaged photograph is projected.
Inventors
- 👤 Hisanori Ataka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:57
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/24; G07C9/243
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A method for photographically recording characters or symbols in a reproducibly indiscernible manner comprising the steps of: photographically recording a concealing or camouflaging object through a lens plate having a multitude of lenses and a key pattern or coding plate which is disposed in closely spacedapart relation with said lens plate and has at least one light shielding portion located so as to correspond to some of said lenses of said lens plate and other portions except said light shielding portion made transparent, photographically recording through said lens plate with said key pattern plate removed, a true original to be essentially recorded and made reproducibly indiscernible, thereby forming a concealed or camouflaged photographic record; and reproducing said concealed or camouflaged record of said original through said lens plate with a decoding plate which is placed at the position of said key pattern plate in said recording and which has the light-shielded portions and transparent portions complementary to those of said key pattern plate.
Claim 2
Independent Claim
163 words
A method for photographically recording characters or symbols in a reproducibly indiscernible manner comprising the steps of: photographically recording a concealing or camouflaging object through a lens plate having a multitude of lenses and a key pattern or coding plate which is disposed in closely spacedapart relation with said lens plate and has at least one light shielding portion located so as to correspond to some of said lenses of said lens plate and other portions except said light shielding portion made transparent, photographically recording through said lens plate with said key pattern plate removed, a true original to be essentially recorded and made reproducibly indiscernible, thereby forming a concealed or camouflaged photographic record; and reproducing said concealed or camouflaged record of said original through said lens plate with a decoding plate which is placed at the position of said key pattern plate in said recording and which has the light-shielded portions and transparent portions complementary to those of said key pattern plate.
Claim 3
Dependent Claim
175 words
A photographically recording device for recording characters or symbols in a reproducibly indiscernible manner comprising: a first projection light source for projecting a true original to be recorded in a reproducibly indiscernible manner; a true original mounting member; a semitransparent reflecting mirror disposed at 45* relative to the optical axis of the true original projection optical system, a key pattern plate supporting member, a lens plate consisting of a plurality of lenses, a shutter, a sensitized sheet-holding member, said light source, said original mounting member, said reflecting mirror, said key pattern plate supporting member, said lens plate, a sensitized sheet-holding member and said shutter being disposed in the order named along said optical axis, a concealing or camouflaging Object mounting member and a second projection light source for projecting a camouflaging original both of which are disposed along the line perpendicular to said optical axis so that said concealing or camouflaging object may be projected upon a sensitized sheet upon said sensitized sheet holding member through said reflecting mirror, said lens plate and said shutter
Claim 4
Dependent Claim
175 words
A photographically recording device for recording characters or symbols in a reproducibly indiscernible manner comprising: a first projection light source for projecting a true original to be recorded in a reproducibly indiscernible manner; a true original mounting member; a semitransparent reflecting mirror disposed at 45* relative to the optical axis of the true original projection optical system, a key pattern plate supporting member, a lens plate consisting of a plurality of lenses, a shutter, a sensitized sheet-holding member, said light source, said original mounting member, said reflecting mirror, said key pattern plate supporting member, said lens plate, a sensitized sheet-holding member and said shutter being disposed in the order named along said optical axis, a concealing or camouflaging Object mounting member and a second projection light source for projecting a camouflaging original both of which are disposed along the line perpendicular to said optical axis so that said concealing or camouflaging object may be projected upon a sensitized sheet upon said sensitized sheet holding member through said reflecting mirror, said lens plate and said shutter
Claim 5
Dependent Claim
182 words
A photographically recording device for recording characters or symbols in a reproducibly indiscernible manner comprising: a first projection light source for projecting a true original to be recorded in a reproducibly indiscernible manner, a semitransparent reflecting mirror disposed at 45* relative to the optical axis of the true original projection optical system, a true original mounting member, a key pattern plate supporting member, a lens plate consisting of a plurality of lenses, a shutter, a sensitized sheet-holding member, said light source, semitransparent reflecting mirror, said true original mounting member, said lens plate, said shutter and said sensitized sheet holding member being arranged along said optical system in the order named, a concealing or camouflaging object projection lens, a concealing or camouflaging object mounting member and a second projection light source for projecting a camouflaging original which are so arranged along a line perpendicular relative to said optical axis that the camouflaging original upon said concealing or camouflaging object mounting member may be photographically recorded upon a sensitized sheet through said reflecting mirror, said key pattern plate, said lens plate and said shutter.
Claim 6
Dependent Claim
182 words
A photographically recording device for recording characters or symbols in a reproducibly indiscernible manner comprising: a first projection light source for projecting a true original to be recorded in a reproducibly indiscernible manner, a semitransparent reflecting mirror disposed at 45* relative to the optical axis of the true original projection optical system, a true original mounting member, a key pattern plate supporting member, a lens plate consisting of a plurality of lenses, a shutter, a sensitized sheet-holding member, said light source, semitransparent reflecting mirror, said true original mounting member, said lens plate, said shutter and said sensitized sheet holding member being arranged along said optical system in the order named, a concealing or camouflaging object projection lens, a concealing or camouflaging object mounting member and a second projection light source for projecting a camouflaging original which are so arranged along a line perpendicular relative to said optical axis that the camouflaging original upon said concealing or camouflaging object mounting member may be photographically recorded upon a sensitized sheet through said reflecting mirror, said key pattern plate, said lens plate and said shutter.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |