GB768399A - Draughtsman's drawing board and t-square - Google Patents

Draughtsman's drawing board and t-square

Info

Publication number
GB768399A
GB768399A GB2162/55A GB216255A GB768399A GB 768399 A GB768399 A GB 768399A GB 2162/55 A GB2162/55 A GB 2162/55A GB 216255 A GB216255 A GB 216255A GB 768399 A GB768399 A GB 768399A
Authority
GB
United Kingdom
Prior art keywords
square
magnet
drawing board
rollers
soft iron
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
GB2162/55A
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
Publication of GB768399A publication Critical patent/GB768399A/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
    • 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
    • B43L13/04—Guides for rulers
    • B43L13/048—Guides for rulers with T-squares

Abstract

768,399. Draughting-machines. GIRARD, E. P., and GEISSER, L. Jan. 25, 1955 '[July 17, 1954], No. 2162/55. Class 97(3) A T-square is held in contact with a drawing board by a magnet on one of them co-operating with, but separated by an air-gap from, an armature on the other, the T-square being provided with rollers which do not form part of the magnetic circuit. As shown, the head 4 of the T- square moves on rollers 11, preferably made of plastic material, over the soft iron strip on the drawing board 1. The head contains a magnet system comprising a permanent magnet, 9 with soft iron pole pieces 10; the whole being movable by an eccentric cam 12 to alter the separation from the strip 2. An electro-magnet may be used instead of a permanent magnet and may be mounted on the board with the associated armature on the T-square.
GB2162/55A 1954-07-17 1955-01-25 Draughtsman's drawing board and t-square Expired GB768399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH768399X 1954-07-17

Publications (1)

Publication Number Publication Date
GB768399A true GB768399A (en) 1957-02-13

Family

ID=4535201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2162/55A Expired GB768399A (en) 1954-07-17 1955-01-25 Draughtsman's drawing board and t-square

Country Status (4)

Country Link
CH (1) CH327319A (en)
DE (1) DE961867C (en)
FR (1) FR1117854A (en)
GB (1) GB768399A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137072A (en) * 1961-07-26 1964-06-16 Nell T Henson Drafting board with magnetic t-square
US4383375A (en) * 1981-03-05 1983-05-17 Plan Hold Corporation Drafting apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214119A (en) * 1964-01-13 1965-10-26 Gaertner Scient Corp Movable carriage and mount

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE141658C (en) *
DE447893C (en) * 1923-12-01 1927-08-05 Lindsay Ernest Edwards A device with a permanent magnet to hold the drawing stick on the drawing board
US2568575A (en) * 1949-10-24 1951-09-18 Lester F Wickman Magnetic t square and drafting board

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137072A (en) * 1961-07-26 1964-06-16 Nell T Henson Drafting board with magnetic t-square
US4383375A (en) * 1981-03-05 1983-05-17 Plan Hold Corporation Drafting apparatus

Also Published As

Publication number Publication date
CH327319A (en) 1958-01-31
DE961867C (en) 1957-04-11
FR1117854A (en) 1956-05-28

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