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GB293921A - Improved apparatus for the mechanical solution of trigonometrical problems - Google Patents

Improved apparatus for the mechanical solution of trigonometrical problems

Info

Publication number
GB293921A
GB293921A GB1094827A GB1094827A GB293921A GB 293921 A GB293921 A GB 293921A GB 1094827 A GB1094827 A GB 1094827A GB 1094827 A GB1094827 A GB 1094827A GB 293921 A GB293921 A GB 293921A
Authority
GB
United Kingdom
Prior art keywords
arms
base
cursors
sights
sighting
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
GB1094827A
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 GB1094827A priority Critical patent/GB293921A/en
Publication of GB293921A publication Critical patent/GB293921A/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
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/20—Instruments for performing navigational calculations

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Navigation (AREA)

Abstract

293,921. Ellis, R. E., (Addison, H.). April 23, 1927. Angle-measuring instruments.-In navigational triangle-solving apparatus of the kind described in Specifications 253,758, 264,755 and 273,198, [all in Class 106 (i), Calculating &c.], comprising at least three aims movable about the centre of a circular base, one or more of the arms are extended diametrically across the base and provided with sights to enable the arms to be set by direct observation. In the form shown the instrument comprises three arms e, f, g, all extending diametrically across the base c and attached to rings s rotatably mounted on the base. The arms are provided with cursors j, m, l, connected by pantograph links k. Clamps q, r are provided for the arms and cursors respectively. The arms e, f are provided with sights t for sighting in a horizontal direction and may also be provided with apertures u with crosswires &c. for sighting vertically. The instrument may be mounted rotatably over the bowl w of a compass so that the sights u can be used to set any desired diameter of the base c parallel to the fore-and-aft line of the ship. An additional graduated disc may be mounted so as to be rotatable relatively to the base, in order to enable both true and magnetic bearings to be read off. The graduated disc or discs may be provided with parallel ruled lines serving as auxiliary means for measuring the angle made by the line joining any of the cursors with the zero line of the base. To facilitate independent adjustments of the arms, means may be provided for disconnecting any of the cursors from the pantograph.
GB1094827A 1927-04-23 1927-04-23 Improved apparatus for the mechanical solution of trigonometrical problems Expired GB293921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1094827A GB293921A (en) 1927-04-23 1927-04-23 Improved apparatus for the mechanical solution of trigonometrical problems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1094827A GB293921A (en) 1927-04-23 1927-04-23 Improved apparatus for the mechanical solution of trigonometrical problems

Publications (1)

Publication Number Publication Date
GB293921A true GB293921A (en) 1928-07-19

Family

ID=9977226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1094827A Expired GB293921A (en) 1927-04-23 1927-04-23 Improved apparatus for the mechanical solution of trigonometrical problems

Country Status (1)

Country Link
GB (1) GB293921A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422931A (en) * 1944-10-27 1947-06-24 Rudolph H Sachtleber Measuring instrument
FR2300992A1 (en) * 1975-02-12 1976-09-10 King Richard PORTABLE NAVIGATION INSTRUMENT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422931A (en) * 1944-10-27 1947-06-24 Rudolph H Sachtleber Measuring instrument
FR2300992A1 (en) * 1975-02-12 1976-09-10 King Richard PORTABLE NAVIGATION INSTRUMENT

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