GB342114A - Improvements in or relating to trammels - Google Patents

Improvements in or relating to trammels

Info

Publication number
GB342114A
GB342114A GB184530A GB184530A GB342114A GB 342114 A GB342114 A GB 342114A GB 184530 A GB184530 A GB 184530A GB 184530 A GB184530 A GB 184530A GB 342114 A GB342114 A GB 342114A
Authority
GB
United Kingdom
Prior art keywords
pencil
perforations
slots
centre point
ruler
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
GB184530A
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.)
ERNEST MYERS DIGNAN
Original Assignee
ERNEST MYERS DIGNAN
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 ERNEST MYERS DIGNAN filed Critical ERNEST MYERS DIGNAN
Priority to GB184530A priority Critical patent/GB342114A/en
Publication of GB342114A publication Critical patent/GB342114A/en
Expired legal-status Critical Current

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
    • B43L7/00—Straightedges

Landscapes

  • Drawing Aids And Blackboards (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

342,114. Drawing-instruments. DIGNAN, E. M., 1, Cale Street, Chelsea, London. Jan. 18, 1930, Nos. 1845 and 30,341. [Class 97 (iii).] In a device for describing circular arcs, comprising a ruler provided with perforations through which a centre point and a pencil &c. can be passed, the perforations are in the form of slots, or are keyhole-shaped, to enable the device to be used for cutting as well as for drawing. In Fig. 1 the slots are of double keyhole form, the central parts h permitting a pencil to be used, while the extensions j can accommodate the blade of a knife &c. The centre point c, Fig. 4, may be carried by a leaf spring e attached to a cursor f which can slide along the ruler.
GB184530A 1930-01-18 1930-01-18 Improvements in or relating to trammels Expired GB342114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB184530A GB342114A (en) 1930-01-18 1930-01-18 Improvements in or relating to trammels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB184530A GB342114A (en) 1930-01-18 1930-01-18 Improvements in or relating to trammels

Publications (1)

Publication Number Publication Date
GB342114A true GB342114A (en) 1931-01-29

Family

ID=9729007

Family Applications (1)

Application Number Title Priority Date Filing Date
GB184530A Expired GB342114A (en) 1930-01-18 1930-01-18 Improvements in or relating to trammels

Country Status (1)

Country Link
GB (1) GB342114A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939219A (en) * 1955-09-28 1960-06-07 Georges Michael Drafting scale
US3289299A (en) * 1963-11-20 1966-12-06 Anne Elger Drawing device
US5822871A (en) * 1996-11-07 1998-10-20 Walker; Douglas D. Tool to aid in cutting circles in drywall

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939219A (en) * 1955-09-28 1960-06-07 Georges Michael Drafting scale
US3289299A (en) * 1963-11-20 1966-12-06 Anne Elger Drawing device
US5822871A (en) * 1996-11-07 1998-10-20 Walker; Douglas D. Tool to aid in cutting circles in drywall

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