US3682108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing machine
Assignee: Individual
•
Filing: 1970-12-30
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Granted: 1972-08-08
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Expires: 1990-12-30
Abstract
Abstract A drawing machine is disclosed, adapted for association with drawing boards of considerable dimensions. The machine is characterized in that it comprises at least two guiding columns mounted on a base structure, the columns receiving therein reciprocable rods having lateral tubular members secured to the ends thereof, projecting from the respective columns. These lateral tubular members are connected by slidable sleeves providing for limited rotation of said rods in respect of each other in two planes. Conical couplings carrying thereon bracket means for supporting the drawing board are mounted on the respective free ends of the lateral tubular members and are interconnected by an elongated resilient connecting member passing through the lateral tubular members and holding them together in the direction of the longitudinal axis thereof.
Inventors
- 👤 Evgeny Mikhailovich Perminov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:35
CPC Classifications
A; A47; A47B; A47B27/00; A47B27/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
349 words
A drawing machine comprising at least one base structure; a plurality of guiding columns mounted on said base structure; a plurality of rods movably received in the respective ones of said plurality of guiding columns; roller means mounted on each one of said rods for rolling contact with said respective columns, as said rods are moved in said columns; lateral tubular members attached to the end portions of said rods, projecting from the respective ones of said guiding columns, slidable sleeves connecting each adjacent pair of the ends of said lateral tubular members, so that said rods are free for limited rotation relative to one another in at least two planes; a pair of conical couplings mounted on the respective free end of said lateral tubular members; a resilient connecting member interconnecting said pair of couplings and passing throughout said lateral tubular members of all said rods, thus holding said tubularmembers together in the direction of the longitudinal axes thereof; bracket means carried by said Couplings and adapted to support a drawing board; drum assemblies for counterbalancing said rods, mounted on said base structure beneath each one of said plurality of guiding columns, each said drum assembly including: a shaft extending inside a drum; torsion spring means received inside said drum and having one end thereof connected to said drum and the opposite end thereof connected to said shaft; elongated cable means operatively connecting said resilient connecting member with the respective ones of said drum assemblies; elastic flat band means adapted to retain said rods at a desired height of the extension of said rods from the respective ones of said guiding columns, said elastic flat band means being positioned adjacent to the external periphery of said drum and making at least one loop about said periphery of said drum, said elastic flat band means having the opposite ends thereof connected to said base structure; arms mounted on said respective shafts of said drum assemblies at least one control foot pedal mounted on said base structure; a connecting rod establishing operative connection of said foot pedal with said arms.
Claim 2
Dependent Claim
349 words
A drawing machine comprising at least one base structure; a plurality of guiding columns mounted on said base structure; a plurality of rods movably received in the respective ones of said plurality of guiding columns; roller means mounted on each one of said rods for rolling contact with said respective columns, as said rods are moved in said columns; lateral tubular members attached to the end portions of said rods, projecting from the respective ones of said guiding columns, slidable sleeves connecting each adjacent pair of the ends of said lateral tubular members, so that said rods are free for limited rotation relative to one another in at least two planes; a pair of conical couplings mounted on the respective free end of said lateral tubular members; a resilient connecting member interconnecting said pair of couplings and passing throughout said lateral tubular members of all said rods, thus holding said tubularmembers together in the direction of the longitudinal axes thereof; bracket means carried by said Couplings and adapted to support a drawing board; drum assemblies for counterbalancing said rods, mounted on said base structure beneath each one of said plurality of guiding columns, each said drum assembly including: a shaft extending inside a drum; torsion spring means received inside said drum and having one end thereof connected to said drum and the opposite end thereof connected to said shaft; elongated cable means operatively connecting said resilient connecting member with the respective ones of said drum assemblies; elastic flat band means adapted to retain said rods at a desired height of the extension of said rods from the respective ones of said guiding columns, said elastic flat band means being positioned adjacent to the external periphery of said drum and making at least one loop about said periphery of said drum, said elastic flat band means having the opposite ends thereof connected to said base structure; arms mounted on said respective shafts of said drum assemblies at least one control foot pedal mounted on said base structure; a connecting rod establishing operative connection of said foot pedal with said arms.
Claim 3
Dependent Claim
56 words
A drawing machine according to claim 1, wherein the opposite end portions of each said lateral tubular member have made therein cylindrical counterbores for receiving thereinside either said slidable sleeves or the coupling members of said conical couplings; each said coupling member receivable within said counterbore being an externally cylindrical part with a conical internal bore.
Claim 4
Dependent Claim
19 words
A drawing machine according to claim 2, wherein said externally cylindrical part is made of an elastic plastic material.
Claim 5
Dependent Claim
23 words
A drawing machine according to claim 1, wherein said conical couplings are connected with said resilient connecting member by means of threaded connections.
Claim 6
Dependent Claim
120 words
A drawing machine according to claim 1, wherein said roller means mounted on each said rod are so arranged that two pairs of said roller means are positioned for each said pair to rotate about a respective axis, said axes being rigidly secured to said rod at a pair of the opposite sides of said rod, at the diagonal points along the length of said rod; said rod further carrying a pair of spring-biased pivotable arms, the respective pivot axes of said arms being mounted on said rod at the other pair of the opposite sides of said rod, at another pair of the diagonal points along the length of said rod; each said arm carrying at least one roller.
Claim 7
Dependent Claim
62 words
A drawing machine according to claim 1, including a pair of said movable rods and a pair of said guiding columns, said pair of guiding columns being supported by a single base structure, said arms, included into the operative connection of said shaft of said drum assemblies with said control foot pedal, being mounted for pivoting motion about a common additional axis.
Claim 8
Dependent Claim
54 words
A drawing machine according to claim 1, including three said movable rods supported by individual respective base structures, said elastic flat band means adapted to retain said rods at a desired height being associated only with that one of said drum assemblies which is positioned in the central one of said individual base structure.
Claim 9
Dependent Claim
24 words
A drawing machine according to claim 1, wherein said slidable sleeves carry additional bracket means adapted to support said drawing board of said machine.
References Cited (Backward Citations)
US3358620A
Cited
US3543282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |