GB754445A - Improvements relating to drawing apparatus - Google Patents
Improvements relating to drawing apparatusInfo
- Publication number
- GB754445A GB754445A GB226154A GB226154A GB754445A GB 754445 A GB754445 A GB 754445A GB 226154 A GB226154 A GB 226154A GB 226154 A GB226154 A GB 226154A GB 754445 A GB754445 A GB 754445A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rail
- plate
- bracket
- carriage
- drawing board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
Landscapes
- Eye Examination Apparatus (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
754,445. Draughting-machines. ROFF, P. J. (Lehsten, S.). Jan. 26, 1955 [Jan. 26, 1954], No. 2261/54. Class 97 (3). Drawing apparatus comprises a supporting frame including an elongated frame member extending from top to bottom of a drawing board and having at one end a wheeled carriage which travels along a straight guide rail itself secured to an edge of the drawing board, a vertical guide rail secured to said carriage so as to be permanently at right-angles to the path of travel of the carriage and a scale-carrying member slidably mounted upon the vertical guide rail, the scale carrying member having mounted thereon a protractor head and means for attaching linear scales thereto. A hollow member 10, extending slightly obliquely across a drawing-board, is fixed at its end to a large bracket 11 and a smaller bracket 12. Bracket 11 carries grooved rollers 16 which engage a horizontal guide-rail 17 fixed at the top of the drawing board. The bracket 12 has an extension 13 carrying a roller 14 which slides along the bottom of the drawing board or an extension thereof. Brackets 11 and 12 are joined by a vertical guide-rail 18 of oval section which extends at right angles to the direction of movement of the bracket 11. A carriage 19 mounted on rail 18 has cylindrical rollers 20 engaging the underside of rail 17, and a friction brake 31 whereby the assembly can be locked in any position along the horizontal guide rail 17. A scale carrying member 32 has grooved rollers 33 engaging the vertical rail 18. A flat plate 37 is pivoted at 39 to plate 32, and is also pivoted at 41 to a link 40 which is connected to an eccentric 43 mounted on a plate 32, so that the plate 37 can be adjusted. A knob 51 is journalled in plate 37 and carries the arms 47, 48 carrying the scales, which can be set in positions differing by 15 per cent by means of a notch plate (not shown) engaged by a pawl. The scales may be held in intermediate position by a friction brake operating when the pawl is held out of engagement. Plate 32 is normally locked in position along the rail 18 by a friction brake which may be released by operation of lever 36. A cord 62 is connected to plate 32 through a spring 65, passes over pulleys 63 mounted in housings 64 on the bracket 11, and then passes to a counterweight 61 sliding in the tube 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB226154A GB754445A (en) | 1954-01-26 | 1954-01-26 | Improvements relating to drawing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB226154A GB754445A (en) | 1954-01-26 | 1954-01-26 | Improvements relating to drawing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB754445A true GB754445A (en) | 1956-08-08 |
Family
ID=9736442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB226154A Expired GB754445A (en) | 1954-01-26 | 1954-01-26 | Improvements relating to drawing apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB754445A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3003243A (en) * | 1958-02-06 | 1961-10-10 | Hamilton Mfg Co | Combined pencil trough, instrument guard and drafting machine track for drawing board |
US3153284A (en) * | 1962-08-06 | 1964-10-20 | Harlan N Harris | Drafting machine |
US3316644A (en) * | 1960-07-18 | 1967-05-02 | Keuffel & Esser Co | Drafting machine |
US3703768A (en) * | 1970-02-24 | 1972-11-28 | Mi O Z Sp K | Drawing head for use in drawing devices |
US3714714A (en) * | 1971-02-12 | 1973-02-06 | E Bullard | Drafting machine |
-
1954
- 1954-01-26 GB GB226154A patent/GB754445A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3003243A (en) * | 1958-02-06 | 1961-10-10 | Hamilton Mfg Co | Combined pencil trough, instrument guard and drafting machine track for drawing board |
US3316644A (en) * | 1960-07-18 | 1967-05-02 | Keuffel & Esser Co | Drafting machine |
US3153284A (en) * | 1962-08-06 | 1964-10-20 | Harlan N Harris | Drafting machine |
US3703768A (en) * | 1970-02-24 | 1972-11-28 | Mi O Z Sp K | Drawing head for use in drawing devices |
US3714714A (en) * | 1971-02-12 | 1973-02-06 | E Bullard | Drafting machine |
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