US4616423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tactical dinghy compass
Assignee: J & K SHEPHARD DESIGN Pty Ltd SUITE 15 1ST FLOOR 19-21 CENTRAL AVENUE MIRANDA NSW 2228
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Filing: 1983-10-21
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Granted: 1986-10-14
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Expires: 2003-10-21
Abstract
Abstract A compass having a color coded compass card for enhanced reading of the compass. The compass card is divided into four quadrants each of which is further subdivided into equal sectors differently colored within each quadrant; the color sequence of the sectors within each quadrant is repeated in each quadrant. The color sequencing enables an efficient method of navigating a sailing dinghy around an olympic course.
Inventors
- 👤 Kevin E. Shephard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:05
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/04; G01C17/20; G01C17/10; G01C17/14; G01C21/00; G01C21/20; G01C21/203; Y; Y10; Y10S; Y10S116/00; Y10S116/43
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A compass comprising a moveable compass card, said compass card being marked into quadrant portions and having an annulus portion, each quadrant of the annulus being subdivided angularly into a plurality of equal sectors each colored differently from the other sectors in that quadrant said sectors forming a color sequence which is repeated in each quadrant of the annulus portion.
Claim 2
Dependent Claim
60 words
A compass comprising a moveable compass card, said compass card being marked into quadrant portions and having an annulus portion, each quadrant of the annulus being subdivided angularly into a plurality of equal sectors each colored differently from the other sectors in that quadrant said sectors forming a color sequence which is repeated in each quadrant of the annulus portion.
Claim 3
Dependent Claim
30 words
The compass as defined in claim 1 wherein said quadrant portions are differently colored and located on the said compass card separately from the said colored sectors of the annulus.
Claim 4
Dependent Claim
15 words
The compass as defined in claim 1 wherein said sectors are at 10 degree intervals.
Claim 5
Dependent Claim
19 words
A compass as claimed in claim 1, wherein said annulus portion is located along the periphery of said card.
Claim 6
Dependent Claim
19 words
A compass as claimed in claim 1, further comprising a plurality of lubber lines marked thereon at predetermined points.
Claim 7
Dependent Claim
63 words
A compass card for use in a compass, said compass card being circular and marked into quadrant portions and having an annulus portion, each quadrant of the annulus being subdivided angularly into a plurality of equal sectors each colored differently from the other sectors in that quadrant, said sectors forming a color sequence which is repeated in each quadrant of the annulus portion.
Claim 8
Dependent Claim
63 words
A compass card for use in a compass, said compass card being circular and marked into quadrant portions and having an annulus portion, each quadrant of the annulus being subdivided angularly into a plurality of equal sectors each colored differently from the other sectors in that quadrant, said sectors forming a color sequence which is repeated in each quadrant of the annulus portion.
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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |