GB473529A - Combined level and square - Google Patents

Combined level and square

Info

Publication number
GB473529A
GB473529A GB938737A GB938737A GB473529A GB 473529 A GB473529 A GB 473529A GB 938737 A GB938737 A GB 938737A GB 938737 A GB938737 A GB 938737A GB 473529 A GB473529 A GB 473529A
Authority
GB
United Kingdom
Prior art keywords
vertical
aperture
horizontal
wider
slit
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
GB938737A
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
Priority to GB938737A priority Critical patent/GB473529A/en
Publication of GB473529A publication Critical patent/GB473529A/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
    • G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels

Landscapes

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

Abstract

473,529. Cross - staves; levels. ROGGERO, C. April 2, 1937, No. 9387. [Class 97 (ii)] A pendulous box D is universally suspended in a stirrup C and is provided in the upper part with narrow horizontal slits E each opposite a wider horizontal aperture El and in the lower part with narrow vertical slits G, K, L, H, each opposite a wider vertical aperture G<1>, K<1>, L<1>, H<1>, a cross hair T being provided in each wider aperture. A pair of threaded weights Pare adjusted on screws Q at right-angles at the bottom of the box so that the latter hangs vertically. By sighting so that a horizontal cross hair T appears in the middle of the corresponding slit E, the vision extends through a horizontal plane and by sighting with a vertical cross hair in the middle of the corresponding vertical slit the vision extends through one of a series of vertical planes passing through the vertical axis of the apparatus and at 45‹ to each other as shown in Fig. 6. Masks M, M<1>, N, N<1> confine the vision through a vertical slit to the corresponding vertical aperture. The stirrup C is rotatably mounted about a vertical axis in a block A carried by a stand B and is provided with an index mark moving adjacent graduations on the block A.
GB938737A 1937-04-02 1937-04-02 Combined level and square Expired GB473529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB938737A GB473529A (en) 1937-04-02 1937-04-02 Combined level and square

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB938737A GB473529A (en) 1937-04-02 1937-04-02 Combined level and square

Publications (1)

Publication Number Publication Date
GB473529A true GB473529A (en) 1937-10-14

Family

ID=9870982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB938737A Expired GB473529A (en) 1937-04-02 1937-04-02 Combined level and square

Country Status (1)

Country Link
GB (1) GB473529A (en)

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