GB569988A - Improvements in or relating to mathematical instruments - Google Patents

Improvements in or relating to mathematical instruments

Info

Publication number
GB569988A
GB569988A GB1678143A GB1678143A GB569988A GB 569988 A GB569988 A GB 569988A GB 1678143 A GB1678143 A GB 1678143A GB 1678143 A GB1678143 A GB 1678143A GB 569988 A GB569988 A GB 569988A
Authority
GB
United Kingdom
Prior art keywords
relating
rulers
class
mathematical instruments
mathematical
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
GB1678143A
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.)
GEORGE WILLIAM NEVILLE WYNN
Johnson Matthey PLC
Original Assignee
GEORGE WILLIAM NEVILLE WYNN
Johnson Matthey PLC
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 GEORGE WILLIAM NEVILLE WYNN, Johnson Matthey PLC filed Critical GEORGE WILLIAM NEVILLE WYNN
Priority to GB1678143A priority Critical patent/GB569988A/en
Publication of GB569988A publication Critical patent/GB569988A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/02—Rulers with scales or marks for direct reading

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Drawing Aids And Blackboards (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

569,988. Rulers and the like. JOHNSON, MATTHEY, & CO., Ltd., and WYNN, G. W. N. Oct. 13, 1943, No. 16781. [Class 97 (iii)] Scale markings, provided on the surface of glass rulers, protractors, &c., which is adapted to contact the surface of the drawing paper, are formed by applying vitrifiable enamel and firing the ruler &c. Specifications 29530/96, [Class 97], 471,219, [Group XVI], and 543,881 are referred to.
GB1678143A 1943-10-13 1943-10-13 Improvements in or relating to mathematical instruments Expired GB569988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1678143A GB569988A (en) 1943-10-13 1943-10-13 Improvements in or relating to mathematical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1678143A GB569988A (en) 1943-10-13 1943-10-13 Improvements in or relating to mathematical instruments

Publications (1)

Publication Number Publication Date
GB569988A true GB569988A (en) 1945-06-18

Family

ID=10083550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1678143A Expired GB569988A (en) 1943-10-13 1943-10-13 Improvements in or relating to mathematical instruments

Country Status (1)

Country Link
GB (1) GB569988A (en)

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