Patent US2246816A successfully refreshed from Google Patents.
US3864833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting device
Assignee: Individual
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Filing: 1973-12-17
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Granted: 1975-02-11
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Expires: 1993-12-17
Abstract
Abstract A novel drafting device and drafting aid; a device comprising removably attachable means for acurately guiding a T-square across any available flat work surface; a removably attachable, size adjustable U-shaped frame providing an elongate straight edge to receive and guide a conventional T-square across and over any conveniently available flat work surface; a T-shaped section beam member and mounting means therefor which are removably adjustably securable to any flat surface, table, wall, window or the like and co-operate with a conventional T-square engageable therewith to permit drawing of straight lines necessary and critical to drafting work; the combination of an elongate, straight beam member T-shaped in transverse section, a pair of mounting members adjustably secured to the T-section beam thereby to provide a U-frame and means on each of the mounting members for removably securing same to a flat working surface, whereby the vertical leg of the T-section beam will operate as a straight edge in cooperation with an inverted, conventional T-square.
Inventors
- 👤 Harold L Bokelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:23
CPC Classifications
B; B43; B43L; B43L7/00; B43L7/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
318 words
Removably attachable means for guiding a T-square across a flat work surface comprising, in combination: an elongate, straight, beam member L-shaped in transverse section thereby to have a first portion thereof positionable substantially parallel to said flat working surface and a second portion thereof simultaneously positionable at substantial right angles to said working surface, a leg at one end of the beam member fixed to and extending at right angles to the first portion thereof and of sufficient length to space upwardly the beam member from a working surface and a sufficient distance that the rule of a conventional Tsquare may slide under the second portion of said beam member without contacting same, a pair of mounting arms pivotably secured to the first portion of said beam member, one adjacent each end thereof and fixable at substantial right angles to the longitudinal axis thereof, one of said mounting arms transversely adjustable of said beam member, this adjustment provided by virtue of a slot formed in the said mounting arm, the other of said mounting arms longitudinally adjustable of said beam member, said adjustability achieved by virtue of an elongate slot formed in the first portion of said beam member, said slot extending substantially parallel to the longitudinal axis of the beam member, and means on each of said mounting arms for removably securing same to said working surface, said securing means of length substantially that of the leg at the end of the beam member, whereby to permit removable fixing of both said beam member and mounting arms as a U-shaped frame to said working surface, with the second portion of said beam member at substantial right angles to said surface, thereby to receive (inverted) the working head of a conventional T-square in sliding abutment there against with the elongate ruler of the T-square extending under the said second portion of the beam member at right angles thereto.
Claim 2
Dependent Claim
318 words
Removably attachable means for guiding a T-square across a flat work surface comprising, in combination: an elongate, straight, beam member L-shaped in transverse section thereby to have a first portion thereof positionable substantially parallel to said flat working surface and a second portion thereof simultaneously positionable at substantial right angles to said working surface, a leg at one end of the beam member fixed to and extending at right angles to the first portion thereof and of sufficient length to space upwardly the beam member from a working surface and a sufficient distance that the rule of a conventional Tsquare may slide under the second portion of said beam member without contacting same, a pair of mounting arms pivotably secured to the first portion of said beam member, one adjacent each end thereof and fixable at substantial right angles to the longitudinal axis thereof, one of said mounting arms transversely adjustable of said beam member, this adjustment provided by virtue of a slot formed in the said mounting arm, the other of said mounting arms longitudinally adjustable of said beam member, said adjustability achieved by virtue of an elongate slot formed in the first portion of said beam member, said slot extending substantially parallel to the longitudinal axis of the beam member, and means on each of said mounting arms for removably securing same to said working surface, said securing means of length substantially that of the leg at the end of the beam member, whereby to permit removable fixing of both said beam member and mounting arms as a U-shaped frame to said working surface, with the second portion of said beam member at substantial right angles to said surface, thereby to receive (inverted) the working head of a conventional T-square in sliding abutment there against with the elongate ruler of the T-square extending under the said second portion of the beam member at right angles thereto.
Claim 3
Dependent Claim
314 words
Removably attachable means for guiding a drafting T-square across a flat working surface comprising, in combination: an elongate straight member T-shaped in transverse section, whereby to have a first portion thereof (the flat of the T) positionable substantially parallel to a flat working surface and a second portion thereof (the leg of the T) simultaneously positionable at substantial right angles to said flat working surface, a downwardly extending leg provided at one end of the straight member operative to space upwardly the straight member from a working surface a sufficient distance that the rule of a conventional T-square may slide under the second portion of said straight member without contacting same, a pair of mounting arms pivotably secured to the first portion of said straight member, one adjacent each end thereof and fixable at substantial right angles thereto, one of said mounting arms transversely adjustable of said straight member, this adjustment provided by virtue of a slot formed in the said mounting arm, the other one of said mounting arms longitudinally adjustable of said straight member, said adjustability achieved by virtue of an elongate slot formed in the first portion of said straight member, said slot extending substantially parallel to the longitudinal axis of the straight member, and means on each of said mounting arms for removably securing same to a flat working surface, said securing means of length substantially that of the leg at the end of the straight member, whereby to permit removable fixing of both said straight member and mounting arms as a U-shaped frame to said working surface with the second portion of said straight member at substantial right angles to said working surface, thereby to receive (inverted) the working head of the conventional T-square in sliding abutment thereagainst, with the elongate ruler of the T-square extending under the said second portion of the straight member At right angles thereto.
Claim 4
Dependent Claim
314 words
Removably attachable means for guiding a drafting T-square across a flat working surface comprising, in combination: an elongate straight member T-shaped in transverse section, whereby to have a first portion thereof (the flat of the T) positionable substantially parallel to a flat working surface and a second portion thereof (the leg of the T) simultaneously positionable at substantial right angles to said flat working surface, a downwardly extending leg provided at one end of the straight member operative to space upwardly the straight member from a working surface a sufficient distance that the rule of a conventional T-square may slide under the second portion of said straight member without contacting same, a pair of mounting arms pivotably secured to the first portion of said straight member, one adjacent each end thereof and fixable at substantial right angles thereto, one of said mounting arms transversely adjustable of said straight member, this adjustment provided by virtue of a slot formed in the said mounting arm, the other one of said mounting arms longitudinally adjustable of said straight member, said adjustability achieved by virtue of an elongate slot formed in the first portion of said straight member, said slot extending substantially parallel to the longitudinal axis of the straight member, and means on each of said mounting arms for removably securing same to a flat working surface, said securing means of length substantially that of the leg at the end of the straight member, whereby to permit removable fixing of both said straight member and mounting arms as a U-shaped frame to said working surface with the second portion of said straight member at substantial right angles to said working surface, thereby to receive (inverted) the working head of the conventional T-square in sliding abutment thereagainst, with the elongate ruler of the T-square extending under the said second portion of the straight member At right angles thereto.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |