US3573809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for encoding a list of terms
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1968-05-15
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Granted: 1971-04-06
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Expires: 1988-05-15
Abstract
Abstract A device for encoding a finite list of terms disposed in alphabetical order which comprises in addition to said list a list of encoded indications relating to each of said terms, a system of visual indications of said terms and a system for reading corresponding encoded indications. According to an essential feature, each list is disposed in the form of a spiral of constant pitch on each of the two faces of a single rotary disc, the terms and corresponding encoded indications being located substantially in opposite and back-to-back relation.
Inventors
- 👤 Patrick Magnien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:07
CPC Classifications
G; G11; G11C; G11C17/00; G11C17/005; G06; G06K; G06K17/00; G11C13/00; G11C13/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A device for coding a finite list of terms comprising a rotary disc, a list of terms in alphabetical order disposed on a side of said disc in a spiral of constant pitch, a list of coded indications relating to each of said terms disposed on the other side of said disc in a spiral of constant pitch, each term and encoded indications being located substantially opposite and in back to back relation on said disc, means for selectively viewing said terms, means for reading the corresponding encoded indications and means for rotating said disc for selecting a desired term.
Claim 2
Independent Claim
100 words
A device for coding a finite list of terms comprising a rotary disc, a list of terms in alphabetical order disposed on a side of said disc in a spiral of constant pitch, a list of coded indications relating to each of said terms disposed on the other side of said disc in a spiral of constant pitch, each term and encoded indications being located substantially opposite and in back to back relation on said disc, means for selectively viewing said terms, means for reading the corresponding encoded indications and means for rotating said disc for selecting a desired term.
Claim 3
Dependent Claim
36 words
A device according to claim 1, the terms and the encoded indications being marked on strips fixed on said disc, the length of each of said strips being substantially equal to the pitch of the spiral.
Claim 4
Dependent Claim
49 words
A device according to claim 1, said means for rotating said disc providing rotation in both directions about the center of said disc including a motor keys for actuating said motor, the speed of rotation of said motor being proportional to the extent of downward displacement of said keys.
Claim 5
Dependent Claim
77 words
A device according to claim 1, said means for viewing said terms and said means for reading corresponding encoded indications including a carriage for radial displacement with respect to said disc, two arms disposed on each side of said disc, a window in each of said arms, elements for reading said encoded indications on one of said arms, and mechanism for driving said carriage for constant centering of said windows with said terms and with said indications.
Claim 6
Dependent Claim
51 words
A device according to claim 4, said mechanism including an endless chain secured to said carriage at one point and a sprocket for driving said chain rigidly fixed to the center of said disc, said sprocket having a circumference which is equal to the pitch of the spiral of said lists.
Claim 7
Dependent Claim
26 words
A device according to claim 1, including a stroboscopic assembly stabilizing the first letter of the moving terms at high speeds of rotation of said disc.
Claim 8
Dependent Claim
30 words
A device according to claim 1, including automatic means for continuous transition from stroboscopic illumination to continuous illumination of said terms as the speed of rotation of said disc decreases.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |