[go: up one dir, main page]

GB584532A - Improvements in instruments for calculating variations in the altitude of the sun - Google Patents

Improvements in instruments for calculating variations in the altitude of the sun

Info

Publication number
GB584532A
GB584532A GB1790044A GB1790044A GB584532A GB 584532 A GB584532 A GB 584532A GB 1790044 A GB1790044 A GB 1790044A GB 1790044 A GB1790044 A GB 1790044A GB 584532 A GB584532 A GB 584532A
Authority
GB
United Kingdom
Prior art keywords
sun
disc
protractor
altitude
scale
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
GB1790044A
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.)
OSCAR DAHLBERG
Original Assignee
OSCAR DAHLBERG
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 OSCAR DAHLBERG filed Critical OSCAR DAHLBERG
Priority to GB1790044A priority Critical patent/GB584532A/en
Publication of GB584532A publication Critical patent/GB584532A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand manipulated computing devices
    • G06G1/0005—Hand manipulated computing devices characterised by a specific application

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

584,532. Calculating - apparatus. DAHLBERG, O. Sept. 19, 1944, No. 17900. [Class 106 (i)] An instrument for calculating the altitude of the sun at various latitudes on various dates comprises a disc 2 provided with latitude scales 5, 6 and date indicators 9, 10, the disc being rotatable on a base plate having sunaltitude scales 7, 8, date scales 11, 12 and lines 13 representing the sun's direction. An arm 3 is rotatable about the centre of the disc 2 and carries a protractor-like scale 4 at its end. The disc 2 is set so that the dateindicator 9 or 10 shows the date on the scale 11 or 12 and the arm 3 is adjusted to.the latitude on the scale 5, 6. The altitude of the sun is the angle between the base line (horizontal plane) of the protractor 4 and the protractor radius extending parallel with the sun-direction lines 13, this angle being read on the protractor.
GB1790044A 1944-09-19 1944-09-19 Improvements in instruments for calculating variations in the altitude of the sun Expired GB584532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1790044A GB584532A (en) 1944-09-19 1944-09-19 Improvements in instruments for calculating variations in the altitude of the sun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1790044A GB584532A (en) 1944-09-19 1944-09-19 Improvements in instruments for calculating variations in the altitude of the sun

Publications (1)

Publication Number Publication Date
GB584532A true GB584532A (en) 1947-01-16

Family

ID=10103216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1790044A Expired GB584532A (en) 1944-09-19 1944-09-19 Improvements in instruments for calculating variations in the altitude of the sun

Country Status (1)

Country Link
GB (1) GB584532A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259169A (en) * 1991-08-28 1993-03-03 Lachlan * Gatherer William Sunrise and sunset calculator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259169A (en) * 1991-08-28 1993-03-03 Lachlan * Gatherer William Sunrise and sunset calculator

Similar Documents

Publication Publication Date Title
GB1055479A (en) Optical apparatus for indicating the angular orientation of a body
GB584532A (en) Improvements in instruments for calculating variations in the altitude of the sun
GB537924A (en) Improvements in and relating to sun compasses
GB381613A (en) Improvements in navigational plotting instruments
GB1411598A (en) Navigation instrument
GB760124A (en) Ground-speed indicator device for use with maps and charts
GB827140A (en) Improvements in or relating to pick-up bearing pressure indicators
GB691351A (en) Improved air navigational device for measurement of track error and computation of ground speed
GB253249A (en) Apparatus for calculating and scale drawing
GB589901A (en) An instrument or device for use in navigational or survey work or instruction
GB596126A (en) Improvements in or relating to sun compasses
GB756117A (en) Improvements in or relating to navigational course finders
GB128811A (en) Improvements in or relating to Course-setting or Calculating Instruments for Navigation or like purposes.
FR2289007A1 (en) Aircraft navigation slide-rule - has two concentric rotary discs and graduated transparent plate pivotal on transparent cursor
GB598167A (en) Improvements in or relating to computing instruments
GB357925A (en) Improvements in drawing and like squares
GB561360A (en) An improved conversion protractor and parallel rule
GB573065A (en) Device for measuring stamp perforations
GB573095A (en) Improvements in or relating to calculators for the solution of triangles
GB600778A (en) Improvements in or relating to measuring or calculating instruments
GB122643A (en) A Magnetic Compass.
GB828841A (en) Improvements in or relating to navigational computers
GB510220A (en) Combined protractor and calculating device for use in navigational problems
GB561784A (en) Distance mileage and route finder for use with globes
GB191506942A (en) Trigonometrical Measuring Instrument.