GB629518A - Improvements in levels - Google Patents

Improvements in levels

Info

Publication number
GB629518A
GB629518A GB30030/47A GB3003047A GB629518A GB 629518 A GB629518 A GB 629518A GB 30030/47 A GB30030/47 A GB 30030/47A GB 3003047 A GB3003047 A GB 3003047A GB 629518 A GB629518 A GB 629518A
Authority
GB
United Kingdom
Prior art keywords
bubble
lens
nov
levels
cylindrical lens
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
GB30030/47A
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.)
Svenska Ackumulator Jungner AB
Original Assignee
Svenska Ackumulator Jungner AB
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 Svenska Ackumulator Jungner AB filed Critical Svenska Ackumulator Jungner AB
Publication of GB629518A publication Critical patent/GB629518A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
    • G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
    • G01C9/34—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble of the tubular type, i.e. for indicating the level in one direction only

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Eyeglasses (AREA)

Abstract

629,518. Levels. SVENSKA ACKUMULATOR AKTIEBOLAGET JUNGNER. Nov. 11, 1947, No. 30030. Convention date, Nov. 13, 1946. Drawings to Specification. [Class 97 (ii)] A liquid level is provided with a cylindrical lens, the bubble of the level being located on or in the proximity of the focal line of the lens so that at least one of the rounded ends of the bubble appears as a straight line. The cylindrical lens may be formed as a portion of the liquid-containing tube or may be provided as a separate lens, and may be combined with a prism system of known type wherein the images of the two ends of the bubble are positioned together along a central line.
GB30030/47A 1946-11-13 1947-11-11 Improvements in levels Expired GB629518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE629518X 1946-11-13

Publications (1)

Publication Number Publication Date
GB629518A true GB629518A (en) 1949-09-21

Family

ID=20313474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30030/47A Expired GB629518A (en) 1946-11-13 1947-11-11 Improvements in levels

Country Status (1)

Country Link
GB (1) GB629518A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221414A (en) * 1961-11-14 1965-12-07 Nippon Kogaku Kk Mechanism for indicating the leveling direction in a surveying instrument
US3281947A (en) * 1963-06-21 1966-11-01 William B Mcdowell Constant bubble indicator
ES2270658A1 (en) * 2004-05-14 2007-04-01 Universidad De Vigo Inclination estimator for use in bicycles to indicate slope has small tube that retains bubble for indicating slope on graduated scale

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221414A (en) * 1961-11-14 1965-12-07 Nippon Kogaku Kk Mechanism for indicating the leveling direction in a surveying instrument
US3281947A (en) * 1963-06-21 1966-11-01 William B Mcdowell Constant bubble indicator
ES2270658A1 (en) * 2004-05-14 2007-04-01 Universidad De Vigo Inclination estimator for use in bicycles to indicate slope has small tube that retains bubble for indicating slope on graduated scale

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