GB189703421A - An Improvement in Mathematical Drawing Instruments. - Google Patents

An Improvement in Mathematical Drawing Instruments.

Info

Publication number
GB189703421A
GB189703421A GB189703421DA GB189703421A GB 189703421 A GB189703421 A GB 189703421A GB 189703421D A GB189703421D A GB 189703421DA GB 189703421 A GB189703421 A GB 189703421A
Authority
GB
United Kingdom
Prior art keywords
improvement
dotting
pen
pawl
drawing instruments
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
Inventor
Charles Henry James Clayton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB189703421A publication Critical patent/GB189703421A/en
Expired legal-status Critical Current

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)

Abstract

3421. Clayton, C. H. J. Feb. 9. Dotting-pens; compasses, drawing.-The Figures show a dotting-pen which may be attached to one leg of a compass. The milled wheel b is mounted on the bracket a', and carries a cam c which rocks up and down a pawl e. This pawl lifts the link f; which is secured to the pen g by a screw hand steadied by the square end on the adjusting- screw j. The return to the paper is effected by the spring p or by a weight. m is a guide for pressing against the T-square or ruler n.
GB189703421D 1897-02-09 1897-02-09 An Improvement in Mathematical Drawing Instruments. Expired GB189703421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB189703421T 1897-02-09

Publications (1)

Publication Number Publication Date
GB189703421A true GB189703421A (en) 1898-01-08

Family

ID=32612475

Family Applications (1)

Application Number Title Priority Date Filing Date
GB189703421D Expired GB189703421A (en) 1897-02-09 1897-02-09 An Improvement in Mathematical Drawing Instruments.

Country Status (1)

Country Link
GB (1) GB189703421A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832140A (en) * 1953-02-02 1958-04-29 Kermit P Frame Drafting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832140A (en) * 1953-02-02 1958-04-29 Kermit P Frame Drafting device

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