GB191018238A - Improvements in Instruments for Measuring Vertical Angles with the Help of a Mirror Suspended so as to Pendulate. - Google Patents

Improvements in Instruments for Measuring Vertical Angles with the Help of a Mirror Suspended so as to Pendulate.

Info

Publication number
GB191018238A
GB191018238A GB191018238DA GB191018238A GB 191018238 A GB191018238 A GB 191018238A GB 191018238D A GB191018238D A GB 191018238DA GB 191018238 A GB191018238 A GB 191018238A
Authority
GB
United Kingdom
Prior art keywords
pendulum
axis
mirror
limbs
prism
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
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Application granted granted Critical
Publication of GB191018238A publication Critical patent/GB191018238A/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
    • G01C1/00—Measuring angles
    • G01C1/08—Sextants
    • G01C1/10—Sextants including an artificial horizon

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

18,238. Zeiss, C., [Firm of]. Aug. 14, 1909, [Convention date]. Clinometers; sextants &c.-Instruments of the type in which a mirror is attached to a pendulum are simplified. Five diagrammatic views are described in the Specification of which Figs. 1 and 4 are here selected as examples. Each instrument comprises a holder e and a pendulum divided into two limbs, rotatable relatively to each other about an axis parallel to, as shown in Fig. 1, or coincident with, as shown in Fig. 4, the axis 4 of the pendulum. The mirror consists of a prism c which extends through a portion only of the field of vision. The centre of gravity of the scale limb a is at the point 1, and that of the pointer b is at the point 2. In each case, the instrument is set for an object on the horizon, but the dotted lines show the position of one or both limbs which occur when the instrument is set for an object on the zenith. In cases such as shown in Fig. 4, where the axis of the pendulum coincides with the axis of rotation, the weights of the limbs have the inverse ratio of the distances of the centres of gravity from the axis of rotation. To the limb to which the prism c is not attached may be fitted a subsidiary mirror d<0> for extending the field of vision. Figs. 6 and 7 show a constructional form, based on the diagram in Fig. 1, in which the axial points 2, 3, 4 are coincident. The adjusting - shaft k carries a pinion k<0> in gear with the sector l of the scale limb rotatable on the pendulum shaft b<0>, to which is fixed the cross b<1> carrying the vernier. The prism c‹ is carried by the pendulum shaft.
GB191018238D 1909-08-14 1910-08-02 Improvements in Instruments for Measuring Vertical Angles with the Help of a Mirror Suspended so as to Pendulate. Expired GB191018238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191018238X 1909-08-14

Publications (1)

Publication Number Publication Date
GB191018238A true GB191018238A (en) 1910-12-22

Family

ID=32521767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191018238D Expired GB191018238A (en) 1909-08-14 1910-08-02 Improvements in Instruments for Measuring Vertical Angles with the Help of a Mirror Suspended so as to Pendulate.

Country Status (1)

Country Link
GB (1) GB191018238A (en)

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