US3745966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-quadrant indicator employing moire effect
Assignee: RCA Licensing Corp
•
Filing: 1971-11-26
•
Granted: 1973-07-17
•
Expires: 1991-11-26
Abstract
Abstract Display apparatus for indicating motion and displacement of a control lever movable about one end thereof through various positions within a spherical sector of radius substantially coextensive with the lever comprises a first regular pattern formed on a transparent surface positionable by the control lever, and a second regular pattern formed on a surface beneath the positionable surface. By employing equally spaced lines in each pattern, each position of the control lever results in creation of unique moire fringes which are set into motion whenever the control lever is moved.
Inventors
- 👤 R Seager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
G; G05; G05G; G05G1/00; G05G1/015; H; H01; H01H; H01H9/00; H01H9/16; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G2009/04703; G05G2009/04707; G05G2009/0474; G05G2009/04748; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20201
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
166 words
Display apparatus for indicating motion and displacement of a control lever movable about one end thereof through various positions within a spherical sector of radius substantially coextensive with said lever, said apparatus comprising: a first regular pattern formed on a transparent surface, said transparent surface being engageable with said lever and displaceable through 360* by movement of said lever; a second regular pattern formed on a surface situated beneath said transparent surface such that the second regular pattern is visible through the transparent surface, said first and second patterns being superimposed on each other so as to form moire fringes; and means retaining both of said surfaces to limit maximum displacement of said first pattern relative to said second pattern. 2. The display apparatus of claim 1 wherein said transparent surface contains an aperture through which said lever passes to permit said transparent surface to be slidably displaced atop the surface on which said second pattern is formed, in accordance with the positioning of said lever.
Claim 2
Dependent Claim
30 words
The display apparatus of claim 2 wherein said aperture is surrounded by a collar, said collar being in contact with said lever at least when said lever is being moved.
Claim 3
Dependent Claim
18 words
The display apparatus of claim 1 wherein the surface on which said second pattern is formed is transparent.
Claim 4
Dependent Claim
18 words
The display apparatus of claim 1 wherein the surface on which said second pattern is formed is opaque.
Claim 5
Dependent Claim
31 words
The display apparatus of claim 2 wherein each of said first and second patterns comprises substantially equally spaced lines, each of said lines representing at least an arc of a circle.
Claim 6
Dependent Claim
56 words
The display apparatus of claim 6 wherein lines in said first pattern form a plurality of concentric circles and lines in said second pattern form four sets of arcs of concentric circles, each set of arcs, respectively, in said second pattern being centered about a separate corner of a four-sided polygon, respectively, containing said second pattern.
Claim 7
Dependent Claim
126 words
A visual display for indicating motion and displacement of a lever movable about one end thereof, said lever being displaceable through a spherical sector of radius substantially coextensive with said lever, said display comprising: a first pattern of equally spaced lines being formed of opaque material separated by regions transparent to light, said lever being contiguous to said first pattern such that said first pattern is displaceable through 360* by movement of said lever; a second pattern of equally spaced lines being formed of oapque material separated by regions transparent to light, said first and second patterns being superimposed on each other to form moire fringes; and means retaining both of said patterns to limit maximum displacement of said first pattern relative to said second pattern.
Claim 8
Dependent Claim
126 words
A visual display for indicating motion and displacement of a lever movable about one end thereof, said lever being displaceable through a spherical sector of radius substantially coextensive with said lever, said display comprising: a first pattern of equally spaced lines being formed of opaque material separated by regions transparent to light, said lever being contiguous to said first pattern such that said first pattern is displaceable through 360* by movement of said lever; a second pattern of equally spaced lines being formed of oapque material separated by regions transparent to light, said first and second patterns being superimposed on each other to form moire fringes; and means retaining both of said patterns to limit maximum displacement of said first pattern relative to said second pattern.
Claim 9
Dependent Claim
38 words
The visual display of claim 1 whrein said first pattern includes an aperture through which said lever passes to permit said first pattern to be slidably displaced atop said second pattern in accordance with positioning of said lever.
Claim 10
Dependent Claim
34 words
The visual display of claim 9 wherein the line spacing of said first pattern equals the line spacing of said second pattern, each of said lines being at least an arc of a circle.
Claim 11
Dependent Claim
52 words
The visual display of claim 10 wherein lines in said first pattern form a plurality of concentric circles and lines in said second pattern form four sets of arcs of concentric circles, each set of arcs, respectively, being centered about a separate corner of a four-sided polygon, respectively, containing said second pattern.
References Cited (Backward Citations)
US2917854A
Cited
US3365975A
Cited
US3372359A
Cited
US3634959A
Cited
US3643361A
Cited
US3629775A
Cited
US3662313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |