Patent US3721022A successfully refreshed from Google Patents.
US3721022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Design device
Assignee: Individual
•
Filing: 1971-01-15
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Granted: 1973-03-20
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Expires: 1991-01-15
Abstract
Abstract The invention is a design device in which the beads have keyways, and the axles on which they are mounted have keys engageable and disengageable from the keyways.
Inventors
- 👤 J Mercorelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
G; G09; G09B; G09B11/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
265 words
A design device comprising: a. an open frame, b. a plurality of axles attached across the frame and locked against rotation, c. a plurality of multi-faceted beads mounted on the axles in interior boRes in the beads, d. keys on the top of the axles, e. keyways corresponding to the keys in the interior bore of the beads, whereby the keyways in the beads gravitationally engage the keys on the top of the axle, f. a back at the bottom of the frame, g. a compressible mat on the back, h. a flexible, low-friction sheet covering the mat, i. means to position the back with the sheet engaged with or disengaged from the bottom of the beads, j. the compressible mat normally urging the sheet to position the beads with the keyways disengaged from the keys, when the back is latched and the sheet is engaged with the bottom of the beads, k. an arcuate bottom on the axles to avoid snagging engagement with the keyways, when the back is latched and the sheet is engaged with the bottom of the beads, l. the beads rotatable on the axles when the back is latched and the sheet is engaged with the bottom of the beads, m. the compressible mat normally urging a facet of the beads to flatly engage the sheet when the back is latched and the sheet is engaged with the bottom of the beads, n. the mat sufficiently compressible, when the latch is raised to engage the sheet with the bottom of the beads, to yield to the beads as they rotate.
Claim 2
Dependent Claim
265 words
A design device comprising: a. an open frame, b. a plurality of axles attached across the frame and locked against rotation, c. a plurality of multi-faceted beads mounted on the axles in interior boRes in the beads, d. keys on the top of the axles, e. keyways corresponding to the keys in the interior bore of the beads, whereby the keyways in the beads gravitationally engage the keys on the top of the axle, f. a back at the bottom of the frame, g. a compressible mat on the back, h. a flexible, low-friction sheet covering the mat, i. means to position the back with the sheet engaged with or disengaged from the bottom of the beads, j. the compressible mat normally urging the sheet to position the beads with the keyways disengaged from the keys, when the back is latched and the sheet is engaged with the bottom of the beads, k. an arcuate bottom on the axles to avoid snagging engagement with the keyways, when the back is latched and the sheet is engaged with the bottom of the beads, l. the beads rotatable on the axles when the back is latched and the sheet is engaged with the bottom of the beads, m. the compressible mat normally urging a facet of the beads to flatly engage the sheet when the back is latched and the sheet is engaged with the bottom of the beads, n. the mat sufficiently compressible, when the latch is raised to engage the sheet with the bottom of the beads, to yield to the beads as they rotate.
Claim 3
Dependent Claim
54 words
A design device according to claim 1 comprising: a. a plurality of locating slots on the bottom of the open frame, b. the locating slots having enlargements to receive the keys of the axles, c. covers for the locating slots, attached to the frame, to secure the axles against discharge from the locating slots.
Claim 4
Dependent Claim
105 words
A design device according to claim 1 in which the means to position the back with the sheet engaged or disengaged from the bottom of the beads comprises: a. slots in the frame at opposite sides thereof, b. upwardly extending deflectable arms on the back, extending slidably through the slots in the frame whereby the back may be raised and lowered with respect to the frame, c. enlargements on the arms defining latches, d. a seat on the frame for receiving the latches when the back is raised and the mat is compressed by the engagement of the sheet with the bottom of the beads.
Claim 5
Dependent Claim
58 words
A design device according to claim 3 comprising: a. a base attached to the bottom of the frame, b. a central opening in the base for providing access to apply pressure to the back to raise it to latched position, c. a portion of the base engagable with the deflectable arms to retain the back within the frame.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |