US4154173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artist's table-easel
Assignee: Individual
•
Filing: 1977-01-28
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Granted: 1979-05-15
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Expires: 1997-01-28
Abstract
Abstract Disclosed is a table-easel which supports a working surface in such a manner that it is readily movable in three directions, height, tilt, and rotation. The height adjustment is achieved by means of a pair of telescopically assembled uprights on a base and support frame which are raised and lowered by a double action turnscrew. The working surface is provided by a tabletop mounted on a cross shaft rotatably supported between the upper ends of the support frame, and tilt is achieved by rotating the cross shaft about its substantially horizontal axis. A locking structure is provided at one end of the cross shaft to lock the shaft in a particular tilt position. To permit rotation of the tabletop about a central axis normal to its surface, a pair of trunnion plates are provided. The tabletop is attached to one of the plates, and the other is attached to the cross shaft. The plates are normally movable with respect to each other but can be readily locked in a particular position so that the rotational position of the tabletop can be fixed. Adjustable clamps are provided to secure paintings or panels of different sizes and configurations on the tabletop even when it is near vertical position.
Inventors
- 👤 Charles R. Chesnut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:11
CPC Classifications
A; A47; A47B; A47B27/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
356 words
An artist's table-easel comprising: a base disposed to rest upon a support surface; a support frame mounted on said base and movable vertically with respect thereto; height adjustment means disposed between said base and said support frame and manually operable to vertically move said support frame with respect to said base; a tabletop mounting frame mounted in said support frame and including a tilt shaft and a pair of relatively rotatable concentrically disposed plates: means movably mounting said tilt shaft in said support frame for movement about a generally horizontal axis; lock means interposed between said tabletop frame and support frame and disposed to lock said tabletop frame in a particular rotational position about the axis of said tilt shaft; work engaging means on one of said rotatable plates for engaging a work surface, said work engaging means including tabletop attachment means and clamp means for securing work on said tabletop; said height adjustment means includes said support frame telescopically assembled with said base, and a turnbuckle having a threaded shaft being disposed between said base and said support frame and being manually operable by rotation of a turnscrew to elevate or lower said support frame with respect to said base by extension or retraction of said shafts; said lock means includes a ratchet gear and pawl connectable to secure said tilt shaft in a particular rotational position about its axis, said pawl being manually disengageable from said rachet gear to permit rotation of said tile shaft to a different axial position; said rotational positioning mechanism includes a pair of superimposed plates with a common rotational axis, said plates being rotational one with respect to the other about said axis, and lock means interconnected with said plates and disposed to releasably lock one plate with respect to the other, to selectively position said plates in a particular rotational relationship; and said tabletop clamping mechanism includes four extensible arms interconnected with one of said rotatable plates, said arms being telescopically extensible for accommodation of different sized and shaped work form, each of said arms having lock means for releasably securing said arm in a particular extended position.
Claim 2
Dependent Claim
356 words
An artist's table-easel comprising: a base disposed to rest upon a support surface; a support frame mounted on said base and movable vertically with respect thereto; height adjustment means disposed between said base and said support frame and manually operable to vertically move said support frame with respect to said base; a tabletop mounting frame mounted in said support frame and including a tilt shaft and a pair of relatively rotatable concentrically disposed plates: means movably mounting said tilt shaft in said support frame for movement about a generally horizontal axis; lock means interposed between said tabletop frame and support frame and disposed to lock said tabletop frame in a particular rotational position about the axis of said tilt shaft; work engaging means on one of said rotatable plates for engaging a work surface, said work engaging means including tabletop attachment means and clamp means for securing work on said tabletop; said height adjustment means includes said support frame telescopically assembled with said base, and a turnbuckle having a threaded shaft being disposed between said base and said support frame and being manually operable by rotation of a turnscrew to elevate or lower said support frame with respect to said base by extension or retraction of said shafts; said lock means includes a ratchet gear and pawl connectable to secure said tilt shaft in a particular rotational position about its axis, said pawl being manually disengageable from said rachet gear to permit rotation of said tile shaft to a different axial position; said rotational positioning mechanism includes a pair of superimposed plates with a common rotational axis, said plates being rotational one with respect to the other about said axis, and lock means interconnected with said plates and disposed to releasably lock one plate with respect to the other, to selectively position said plates in a particular rotational relationship; and said tabletop clamping mechanism includes four extensible arms interconnected with one of said rotatable plates, said arms being telescopically extensible for accommodation of different sized and shaped work form, each of said arms having lock means for releasably securing said arm in a particular extended position.
Claim 3
Dependent Claim
256 words
An artist's table-easel comprising: a base disposed to rest upon a support surface; a support frame mounted on said base and movable vertically with respect thereto; height adjustment means disposed between said base and said support frame and manually operable to vertically move said support frame with respect to said base; a tabletop mounting frame mounted in said support frame and including a tilt shaft and a pair of relatively rotatable concentrically disposed plates; means movably mounting said tilt shaft in said support frame for movement about a generally horizontal axis; lock means interposed between said tabletop frame and support frame and disposed to lock said tabletop frame in a particular rotational position about the axis of said tilt shaft; work engaging means on one of said rotatable plates for engaging a work surface, said work engaging means including tabletop attachment means and clamp means for securing work on said tabletop; said rotational positioning mechanism includes a pair of superimposed plates with a common rotational axis, said plates being rotational one with respect to the other about said axis, and lock means interconnected with said plates and disposed to releasably lock one plate with respect to the other, to selectively position said plates in a particular rotational relationship; and said table top clamping mechanism includes four extensible arms interconnected with one of said rotatable plates, said arms being telescopically extensible for accommodation of different sized and shaped work form, each of said arms having lock means for releasably securing said arm in a particular extended position.
Claim 4
Dependent Claim
256 words
An artist's table-easel comprising: a base disposed to rest upon a support surface; a support frame mounted on said base and movable vertically with respect thereto; height adjustment means disposed between said base and said support frame and manually operable to vertically move said support frame with respect to said base; a tabletop mounting frame mounted in said support frame and including a tilt shaft and a pair of relatively rotatable concentrically disposed plates; means movably mounting said tilt shaft in said support frame for movement about a generally horizontal axis; lock means interposed between said tabletop frame and support frame and disposed to lock said tabletop frame in a particular rotational position about the axis of said tilt shaft; work engaging means on one of said rotatable plates for engaging a work surface, said work engaging means including tabletop attachment means and clamp means for securing work on said tabletop; said rotational positioning mechanism includes a pair of superimposed plates with a common rotational axis, said plates being rotational one with respect to the other about said axis, and lock means interconnected with said plates and disposed to releasably lock one plate with respect to the other, to selectively position said plates in a particular rotational relationship; and said table top clamping mechanism includes four extensible arms interconnected with one of said rotatable plates, said arms being telescopically extensible for accommodation of different sized and shaped work form, each of said arms having lock means for releasably securing said arm in a particular extended position.
Claim 5
Dependent Claim
229 words
An artist's table-easel comprising: a base disposed to rest upon a support surface; a support frame mounted on said base and movable vertically with respect thereto; height adjustment means disposed between said base and said support frame and manually operable for vertically moving said support frame with respect to said base; a tabletop mounting frame mounted in said support frame including a tilt shaft, a pair of superimposed plates mounted on said tilt shaft, at least one of the plates being rotatable with respect to the other about a common axis of symmetry, and locking means interconnected with said pair of plates and disposed to releasably lock one plate with respect to the other for selectively positioning the plates in a particular rotational relationship; means movably mounting said tilt shaft in said support frame for movement about a generally horizontal tilt axis; locking means interposed between said tabletop mounting frame and support frame for releasably locking said tabletop frame in a particular rotational position about the tilt axis; and work engaging means mounted on said one plate of said pair of plates for engaging a work surface including a plurality of arms attached to said one plate and extending radially outwardly therefrom, said arms being telescopically extensible for accommodating different sized and shaped work forms, and releasable lock means for selectively securing said arms in a particular extended position.
Claim 6
Dependent Claim
229 words
An artist's table-easel comprising: a base disposed to rest upon a support surface; a support frame mounted on said base and movable vertically with respect thereto; height adjustment means disposed between said base and said support frame and manually operable for vertically moving said support frame with respect to said base; a tabletop mounting frame mounted in said support frame including a tilt shaft, a pair of superimposed plates mounted on said tilt shaft, at least one of the plates being rotatable with respect to the other about a common axis of symmetry, and locking means interconnected with said pair of plates and disposed to releasably lock one plate with respect to the other for selectively positioning the plates in a particular rotational relationship; means movably mounting said tilt shaft in said support frame for movement about a generally horizontal tilt axis; locking means interposed between said tabletop mounting frame and support frame for releasably locking said tabletop frame in a particular rotational position about the tilt axis; and work engaging means mounted on said one plate of said pair of plates for engaging a work surface including a plurality of arms attached to said one plate and extending radially outwardly therefrom, said arms being telescopically extensible for accommodating different sized and shaped work forms, and releasable lock means for selectively securing said arms in a particular extended position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |