GB721845A - Improvements in or relating to rulers and protractors - Google Patents

Improvements in or relating to rulers and protractors

Info

Publication number
GB721845A
GB721845A GB1836052A GB1836052A GB721845A GB 721845 A GB721845 A GB 721845A GB 1836052 A GB1836052 A GB 1836052A GB 1836052 A GB1836052 A GB 1836052A GB 721845 A GB721845 A GB 721845A
Authority
GB
United Kingdom
Prior art keywords
ruler
rollers
spindle
rulers
july
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
GB1836052A
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.)
ROBERT NIGHTINGALE
Original Assignee
ROBERT NIGHTINGALE
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 ROBERT NIGHTINGALE filed Critical ROBERT NIGHTINGALE
Priority to GB1836052A priority Critical patent/GB721845A/en
Publication of GB721845A publication Critical patent/GB721845A/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
    • B43L7/04—Straightedges with rollers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • Drawing Aids And Blackboards (AREA)

Abstract

721,845. Rulers &c. NIGHTINGALE, R. July 17, 1953 [July 21, 1952], No. 18360/52. Class 97 (3). A ruler or protractor comprises a plate 10 as of transparent plastic having graduations 11 and supporting, on a spindle 14, rollers 12 which project through slots in the plate, these rollers enabling the ruler to be moved up and down a drawing-board. The spindle 14 is accommodated in a housing 15 into which projects a stud 25 which is spring- loaded at 23 so that an inclined surface 26 of the stud normally presses against spindle 14 to prevent movement of the rollers. This brake may be released by finger pressure of the draughtsman when it is desired to move the ruler.
GB1836052A 1952-07-21 1952-07-21 Improvements in or relating to rulers and protractors Expired GB721845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1836052A GB721845A (en) 1952-07-21 1952-07-21 Improvements in or relating to rulers and protractors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1836052A GB721845A (en) 1952-07-21 1952-07-21 Improvements in or relating to rulers and protractors

Publications (1)

Publication Number Publication Date
GB721845A true GB721845A (en) 1955-01-12

Family

ID=10111125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1836052A Expired GB721845A (en) 1952-07-21 1952-07-21 Improvements in or relating to rulers and protractors

Country Status (1)

Country Link
GB (1) GB721845A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726017A (en) * 1970-10-23 1973-04-10 Adler S Drafting instrument
GB2118105A (en) * 1982-04-08 1983-10-26 Graeme Peter Sagar Drawing implements
GB2180799A (en) * 1985-09-23 1987-04-08 Ahmad Tun Syed Nasir Syed Ruler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726017A (en) * 1970-10-23 1973-04-10 Adler S Drafting instrument
GB2118105A (en) * 1982-04-08 1983-10-26 Graeme Peter Sagar Drawing implements
GB2180799A (en) * 1985-09-23 1987-04-08 Ahmad Tun Syed Nasir Syed Ruler

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