GB720853A - Improvements relating to draughtsman's compasses and dividers - Google Patents

Improvements relating to draughtsman's compasses and dividers

Info

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
Application number
GB845453A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALAN HARLING BERG
HORACE KILBY BEAVEN
W H HARLING Ltd
Original Assignee
ALAN HARLING BERG
HORACE KILBY BEAVEN
W H HARLING Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ALAN HARLING BERG, HORACE KILBY BEAVEN, W H HARLING Ltd filed Critical ALAN HARLING BERG
Priority to GB845453A priority Critical patent/GB720853A/en
Publication of GB720853A publication Critical patent/GB720853A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • B43L9/16Features common to compasses, dividers, and callipers
    • B43L9/22Leg-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.
GB845453A 1953-03-26 1953-03-26 Improvements relating to draughtsman's compasses and dividers Expired GB720853A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (8)

* Cited by examiner, † Cited by third party
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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