US4254556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable drafting device for drawing parallel lines, comprising a working plane of flexible plastic material, adapted to be rolled
Assignee: Individual
•
Filing: 1979-04-25
•
Granted: 1981-03-10
•
Expires: 1999-04-25
Abstract
Abstract A portable drafting device for drawing parallel lines, consisting of a rectangular flexible plastic material, two guides applied each on one of the short sides of the board, at least one slider adapted to slide on one of said guides, a rule fastened to at least one slider to slide therewith above said board for drawing parallel lines, said board being capable to be rolled into a roll for rendering it easily transportable.
Inventors
- 👤 Lello Anav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:33
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
A portable drafting device for drawing parallel lines comprising in combination a rectangular board of a flexible plastic material, two upstanding lateral guides, one of said guides on each of the two short parallel sides of the rectangular board, a slider member having means adapted to engage and slide on one of said guides, a rule member, means for fastening one end of said rule member to said slider member to slide therewith on the engaged guide above said board while permitting pivoting of said rule member about said fastening means in a plane parallel with said rectangular board, for drawing parallel lines having any desired inclination, the assembly formed by said slider member and rule member being freely disengagable from one guide and engagable with the other guide to permit drawing parallel lines on the board portion adjacent said other guide, each of said guides and said slider member having two parallel mutually engagable sliding elements to provide greater stability of said slider member when engaged with one of said guides, said board being adapted to be rolled around one of said guides to form a readily transportable roll.
Claim 2
Dependent Claim
190 words
A portable drafting device for drawing parallel lines comprising in combination a rectangular board of a flexible plastic material, two upstanding lateral guides, one of said guides on each of the two short parallel sides of the rectangular board, a slider member having means adapted to engage and slide on one of said guides, a rule member, means for fastening one end of said rule member to said slider member to slide therewith on the engaged guide above said board while permitting pivoting of said rule member about said fastening means in a plane parallel with said rectangular board, for drawing parallel lines having any desired inclination, the assembly formed by said slider member and rule member being freely disengagable from one guide and engagable with the other guide to permit drawing parallel lines on the board portion adjacent said other guide, each of said guides and said slider member having two parallel mutually engagable sliding elements to provide greater stability of said slider member when engaged with one of said guides, said board being adapted to be rolled around one of said guides to form a readily transportable roll.
Claim 3
Dependent Claim
26 words
A portable drafting device as claimed in claim 1, wherein said slider member has a protractor formed thereon for indicating the inclination of said rule member.
Claim 4
Dependent Claim
37 words
A portable drafting device as claimed in claim 1 or 7, wherein said parallel sliding elements consist of two linear rails provided on said guides and two grooves in said slider member with which said rails engage.
Claim 5
Dependent Claim
26 words
A portable drafting device as claimed in claim 3, wherein said board consists of a transparent material to permit copying drawings placed under said transparent board.
Claim 6
Dependent Claim
28 words
A portable drafting device as claimed in claim 1 or 7, wherein said board consists of a transparent material to permit copying drawings placed under said transparent board.
Claim 7
Dependent Claim
148 words
A portable drafting device for drawing parallel lines comprising in combination a rectangular board of a flexible plastic material, two upstanding lateral guides, one of said guides on each of the two short parallel sides of the rectangular board, two slider members, each of said slider members having means adapted to engage and slide on one of said guides, a rule member, means fastening each end of said rule member to one of said slider members to slide therewith on the engaged guides above said board for drawing parallel lines, each of said guides having two surfaces which extend parallel to each other, each of said slide elements having two surfaces which extend parallel to each other and are slidably engaged with said parallel surfaces on their respective guides to provide greater stability of said slider members when engaged with said guides to form a readily transportable roll.
Claim 8
Dependent Claim
148 words
A portable drafting device for drawing parallel lines comprising in combination a rectangular board of a flexible plastic material, two upstanding lateral guides, one of said guides on each of the two short parallel sides of the rectangular board, two slider members, each of said slider members having means adapted to engage and slide on one of said guides, a rule member, means fastening each end of said rule member to one of said slider members to slide therewith on the engaged guides above said board for drawing parallel lines, each of said guides having two surfaces which extend parallel to each other, each of said slide elements having two surfaces which extend parallel to each other and are slidably engaged with said parallel surfaces on their respective guides to provide greater stability of said slider members when engaged with said guides to form a readily transportable roll.
Claim 9
Dependent Claim
26 words
A portable drafting device as claimed in claim 6, wherein said board consists of a transparent material to permit copying drawings placed under said transparent board.
References Cited (Backward Citations)
US184541A
Cited
US196636A
Cited
US328525A
Cited
GB191119488A
Cited
US1290343A
Cited
US2623324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |