US3628251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating pencil-compass
Assignee: Individual
•
Filing: 1970-09-16
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Granted: 1971-12-21
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Expires: 1990-09-16
Abstract
Abstract One leg of a compass has a pencil which is rotatable about its longitudinal axis relative to the remainder of the compass. A yoke at the top of the compass is rotatable relative to the finger knob of the compass is operably coupled with the pencil and is adapted to be manually held against rotation while the compass is turned by the knob. Relative rotation between the pencil and the remainder of the compass is thereby effected during such turning and the pencil tip remains sharpened.
Inventors
- 👤 Erich J Feldl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:19
CPC Classifications
B; B43; B43L; B43L9/00; B43L9/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
In a compass: a rotatable support; a pair of elongated legs pointed at one end thereof; means attaching one of said legs to the support; means mounting the other of said legs on the support for rotation of said other leg about its longitudinal axis, the pointed end of said one leg being adapted to contact a surface upon which a circle is to be described by the pointed end of the other leg, said pointed end of the one leg defining an axis about which said one leg rotates and about which said other leg revolves during rotation of the support; and structure coupled with said other leg for effecting relative rotation of the support and said other leg during said rotation of the support.
Claim 2
Dependent Claim
126 words
In a compass: a rotatable support; a pair of elongated legs pointed at one end thereof; means attaching one of said legs to the support; means mounting the other of said legs on the support for rotation of said other leg about its longitudinal axis, the pointed end of said one leg being adapted to contact a surface upon which a circle is to be described by the pointed end of the other leg, said pointed end of the one leg defining an axis about which said one leg rotates and about which said other leg revolves during rotation of the support; and structure coupled with said other leg for effecting relative rotation of the support and said other leg during said rotation of the support.
Claim 3
Dependent Claim
28 words
The invention of claim 1, wherein said structure includes a manually engageable member for holding said other leg against rotation with said support as the latter is rotated.
Claim 4
Dependent Claim
22 words
The invention of claim 2, wherein is provided a manually engageable element on the support adjacent said member for rotating the support.
Claim 5
Dependent Claim
23 words
The invention of claim 3, wherein said element comprises a finger knob and said member comprises a finger yoke looped over the knob.
Claim 6
Dependent Claim
27 words
The invention of claim 4, wherein said knob is tubular and said yoke has a shaft rotatable in the knob and operably coupled with said other leg.
Claim 7
Dependent Claim
23 words
The invention of claim 5, wherein said mounting means includes a tube attached to the support and having said other leg rotatable therein.
Claim 8
Dependent Claim
17 words
The invention of claim 6, wherein is provided a rod interconnecting the shaft and said other leg.
Claim 9
Dependent Claim
38 words
The invention of claim 7, wherein said other leg comprises a retractable lead pencil operable upon reciprocation of the rod, said shaft being reciprocable within the knob permitting reciprocation of the rod upon manual actuation of the yoke.
Claim 10
Dependent Claim
28 words
The invention of claim 8, wherein said legs are swingable toward and away from each other and wherein said rod is flexible, permitting said swinging of the legs.
References Cited (Backward Citations)
US2701417A
Cited
US3237308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |