GB611973A - Drafting machine - Google Patents

Drafting machine

Info

Publication number
GB611973A
GB611973A GB1462646A GB1462646A GB611973A GB 611973 A GB611973 A GB 611973A GB 1462646 A GB1462646 A GB 1462646A GB 1462646 A GB1462646 A GB 1462646A GB 611973 A GB611973 A GB 611973A
Authority
GB
United Kingdom
Prior art keywords
disc
knob
plate
rulers
base plate
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
GB1462646A
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
Priority to CH244860D priority Critical patent/CH244860A/en
Priority to FR922015D priority patent/FR922015A/en
Application filed by Individual filed Critical Individual
Priority to GB1462646A priority patent/GB611973A/en
Priority to BE465408D priority patent/BE465408A/xx
Publication of GB611973A publication Critical patent/GB611973A/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
    • B43L13/08—Protractor heads

Abstract

611,973. Draughting machines. SCHWARZER, E. May 15, 1946, No. 14626. [Class 97 (iii)] The head of a draughting-machine comprises a knob 12, Fig. 3, constrained to rotate with a sleeve 11 screwed on a shaft 4 by a pin 13 but capable of axial movement thereon against a' spring 16. Rigidly secured to the shaft 4 is a base plate 1 hinged to the parallelogram guides 3 and carrying an index 24 co-operating with a scale 23 on the graduated disc 7. Disc 7 is rigidly secured to a rotary plate 6 carrying the rulers 9, 10 and disc 7 and plate 6 can rotate about shaft 4. Disc 7 carries a mounting 17 for a pawl 18 one end of which is engaged by the knob 12 and the other can engage slots 20 in the base plate 1. Depression of the knob 12 releases the pawl 18 from the base plate 1 thus enabling the disc 7 and plate 6 carrying the rulers to be rotated into a new position. For certain predetermined positions (as shown, at 30 degree intervals) the rulers may be locked by releasing the knob so that pawl 18 engages in the corresponding slot ; in intermediary positions the rulers are locked by rotating the knob thus tightening disc 7 and plate 6 into frictional engagement with base plate 1.
GB1462646A 1946-05-15 1946-05-15 Drafting machine Expired GB611973A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CH244860D CH244860A (en) 1946-05-15 1945-03-03 Drawing machine.
FR922015D FR922015A (en) 1946-05-15 1946-02-12 Drawing device
GB1462646A GB611973A (en) 1946-05-15 1946-05-15 Drafting machine
BE465408D BE465408A (en) 1946-05-15 1946-05-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1462646A GB611973A (en) 1946-05-15 1946-05-15 Drafting machine

Publications (1)

Publication Number Publication Date
GB611973A true GB611973A (en) 1948-11-05

Family

ID=10044659

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1462646A Expired GB611973A (en) 1946-05-15 1946-05-15 Drafting machine

Country Status (4)

Country Link
BE (1) BE465408A (en)
CH (1) CH244860A (en)
FR (1) FR922015A (en)
GB (1) GB611973A (en)

Also Published As

Publication number Publication date
BE465408A (en) 1946-06-29
CH244860A (en) 1946-10-15
FR922015A (en) 1947-05-27

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