GB469838A - A height computing slide rule - Google Patents

A height computing slide rule

Info

Publication number
GB469838A
GB469838A GB720036A GB720036A GB469838A GB 469838 A GB469838 A GB 469838A GB 720036 A GB720036 A GB 720036A GB 720036 A GB720036 A GB 720036A GB 469838 A GB469838 A GB 469838A
Authority
GB
United Kingdom
Prior art keywords
scale
computing
standard
temperature
aneroid
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
GB720036A
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.)
JOHN DUNBAR BLYTH
Original Assignee
JOHN DUNBAR BLYTH
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 JOHN DUNBAR BLYTH filed Critical JOHN DUNBAR BLYTH
Priority to GB720036A priority Critical patent/GB469838A/en
Publication of GB469838A publication Critical patent/GB469838A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand manipulated computing devices
    • G06G1/02—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales
    • G06G1/10—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation
    • G06G1/12—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation logarithmic graduations, e.g. for multiplication

Landscapes

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

Abstract

469,838. Computing-scales. BLYTH, J. D. March 10, 1936, No. 7200. [Class 106 (i)] A computing-scale for finding the equivalent height in Standard Atmosphere according to the International Commission on Air Navigation as indicated by a standard I.C.A.N. aneroid when the air temperature is known comprises two relatively movable members, one of which A has a uniform scale thereon representing density heights and the other B has a scale uniformally graduated to read altitudes, a temperature scale and datum line being marked on opposite members. The scales are arranged in accordance with the formula Hs=1À22Ha-1665+111T where Hs = density height in feet Ha = altitude in feet and T = temperature in degrees Centigrade. The computing scale may be straight, circular, or cylindrical ; the scale may be adapted to fit the face of a standard aneroid or altimeter and would correspond to the scale B.
GB720036A 1936-03-10 1936-03-10 A height computing slide rule Expired GB469838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB720036A GB469838A (en) 1936-03-10 1936-03-10 A height computing slide rule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB720036A GB469838A (en) 1936-03-10 1936-03-10 A height computing slide rule

Publications (1)

Publication Number Publication Date
GB469838A true GB469838A (en) 1937-08-04

Family

ID=9828519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB720036A Expired GB469838A (en) 1936-03-10 1936-03-10 A height computing slide rule

Country Status (1)

Country Link
GB (1) GB469838A (en)

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