GB720853A - Improvements relating to draughtsman's compasses and dividers - Google Patents
Improvements relating to draughtsman's compasses and dividersInfo
- Publication number
- GB720853A GB720853A GB845453A GB845453A GB720853A GB 720853 A GB720853 A GB 720853A GB 845453 A GB845453 A GB 845453A GB 845453 A GB845453 A GB 845453A GB 720853 A GB720853 A GB 720853A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- levers
- nut
- enlargement
- halves
- 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
- B43L9/00—Circular curve-drawing or like instruments
- B43L9/16—Features common to compasses, dividers, and callipers
- B43L9/22—Leg-angle adjusting-means separate from pivots
Landscapes
- Toys (AREA)
Abstract
720,853. Curve-describing instruments. HARLING, Ltd., W. H.; BERG, A. H, and BEAVEN, H. K. March 26, 1953, No. 8454/53. Class 97 (3). The screw adjustment of compasses or dividers is such that a coarse setting can be effected by direct manipulation of the legs independently of the screw of the adjustment. The screw adjustment shown comprises a left- and right-hand threaded screw 1 with a central manipulating wheel 2 guided within a yoke 3 carried on a member 4 at the outer end of which is the C-spring 5 and handle of a divider. The screw 1 extends at each end through an axially divided nut, the two complementary halves 6, 7 of one nut being shown in Fig. 2. These nut halves are slidable and rotatable in an enlargement 8 of each leg and are connected to levers 9, 10 pivoted at 11, 12 on the enlargement and spring urged at 13 so as to close the nut halves around the screw. By pinching the free end portions of levers 9, 10 the nut halves move away from the screw 1 and the legs can then be manipulated directly by hand. Another form is described in which the pivoted levers are urged together by a coil spring. In a further form, the levers are constituted by resilient extensions of a split collar on the leg and are fulcrumed on the enlargement 8 by bearing on shoulders thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB845453A GB720853A (en) | 1953-03-26 | 1953-03-26 | Improvements relating to draughtsman's compasses and dividers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB845453A GB720853A (en) | 1953-03-26 | 1953-03-26 | Improvements relating to draughtsman's compasses and dividers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB720853A true GB720853A (en) | 1954-12-29 |
Family
ID=9852803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB845453A Expired GB720853A (en) | 1953-03-26 | 1953-03-26 | Improvements relating to draughtsman's compasses and dividers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB720853A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2704720A1 (en) * | 1977-02-04 | 1978-08-10 | Clemens Riefler Fabrik Mathema | Quick adjustment spring loaded dividers - have two brackets of double nut spreader lever on common tilting axis |
| DE2748028A1 (en) * | 1977-02-04 | 1979-05-03 | Clemens Riefler Fabrik Mathema | Quick=adjusting divides or callipers - has bearing protrusions on release lever held into engagement by openings in arms |
| FR2574712A1 (en) * | 1984-12-19 | 1986-06-20 | Rotring Werke Riepe Kg | Quick-adjusting compasses |
| DE3606572C1 (en) * | 1986-02-28 | 1987-01-02 | Intertech Zeichengeraete Guent | Fast-adjustment compass |
| EP0324053A2 (en) * | 1988-01-13 | 1989-07-19 | ARICCI COMPASSI S.n.c. di ARICCI GILBERTO & C. | Leg releasing lever for a bow compass |
| DE3836683C1 (en) * | 1988-10-28 | 1989-09-21 | J. S. Staedtler Gmbh & Co, 8500 Nuernberg, De | Compass with adjustment spindle, especially rapid-adjustment compass |
| US6608050B2 (en) * | 1999-07-20 | 2003-08-19 | Pharmacia & Upjohn Company | Lyophilizate of lipid complex of water insoluble porphyrins |
-
1953
- 1953-03-26 GB GB845453A patent/GB720853A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2704720A1 (en) * | 1977-02-04 | 1978-08-10 | Clemens Riefler Fabrik Mathema | Quick adjustment spring loaded dividers - have two brackets of double nut spreader lever on common tilting axis |
| DE2748028A1 (en) * | 1977-02-04 | 1979-05-03 | Clemens Riefler Fabrik Mathema | Quick=adjusting divides or callipers - has bearing protrusions on release lever held into engagement by openings in arms |
| FR2574712A1 (en) * | 1984-12-19 | 1986-06-20 | Rotring Werke Riepe Kg | Quick-adjusting compasses |
| DE3606572C1 (en) * | 1986-02-28 | 1987-01-02 | Intertech Zeichengeraete Guent | Fast-adjustment compass |
| EP0324053A2 (en) * | 1988-01-13 | 1989-07-19 | ARICCI COMPASSI S.n.c. di ARICCI GILBERTO & C. | Leg releasing lever for a bow compass |
| EP0324053A3 (en) * | 1988-01-13 | 1990-03-21 | Aricci Compassi S.N.C. Di Aricci Gilberto & C. | Leg releasing lever for a bow compass |
| DE3836683C1 (en) * | 1988-10-28 | 1989-09-21 | J. S. Staedtler Gmbh & Co, 8500 Nuernberg, De | Compass with adjustment spindle, especially rapid-adjustment compass |
| US6608050B2 (en) * | 1999-07-20 | 2003-08-19 | Pharmacia & Upjohn Company | Lyophilizate of lipid complex of water insoluble porphyrins |
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