GB218548A - Improvements in or relating to range-finding apparatus - Google Patents

Improvements in or relating to range-finding apparatus

Info

Publication number
GB218548A
GB218548A GB2850223A GB2850223A GB218548A GB 218548 A GB218548 A GB 218548A GB 2850223 A GB2850223 A GB 2850223A GB 2850223 A GB2850223 A GB 2850223A GB 218548 A GB218548 A GB 218548A
Authority
GB
United Kingdom
Prior art keywords
resistance
log
base
cosec
range
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
GB2850223A
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.)
MASCHB AG SEEBACH
Original Assignee
MASCHB AG SEEBACH
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 MASCHB AG SEEBACH filed Critical MASCHB AG SEEBACH
Priority to GB2850223A priority Critical patent/GB218548A/en
Publication of GB218548A publication Critical patent/GB218548A/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
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

218,548. Pollak, J. E., (Maschinenbau- Akt.-Ges. Seebach). Nov. 12, 1923. Range-finders. - Electrical resistances are utilized in conjunction with telescopes at the ends of a known base to determine the range of a distant object by the solution of the equation log. distance = log. base + log sin. of the angle opposite the distance to be measured + log. cosec. of the angle opposite to the base. On the axes of the telescopes 1, 2 are mounted resistances 5 provided with contacts 6 arranged so that the resistance in the circuit is proportional to the angles a b respectively. An intermediate instrument Z comprises a similar resistance which is adjusted in conjunction with the resistances 5 so that balance is obtained on a Wheatstone bridge comprising a galvanometer G and a resistance V corresponding to 180‹. On the same axis as the resistance 8 is a resistance 9 corresponding to the valves of cosec c. This resistance 9 is in series with a resistance 20, representing log sin b and a resistance 21, being log. of base. The total resistance is measured on the ohm-meter J graduated in yards, giving the distance required. A modification is described in which the sum of the angles a b is balanced on a Wheatstone bridge against a resistance proportional to cosec. (a + b) utilized in a manner similar to that described above.
GB2850223A 1923-11-12 1923-11-12 Improvements in or relating to range-finding apparatus Expired GB218548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2850223A GB218548A (en) 1923-11-12 1923-11-12 Improvements in or relating to range-finding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2850223A GB218548A (en) 1923-11-12 1923-11-12 Improvements in or relating to range-finding apparatus

Publications (1)

Publication Number Publication Date
GB218548A true GB218548A (en) 1924-07-10

Family

ID=10276645

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2850223A Expired GB218548A (en) 1923-11-12 1923-11-12 Improvements in or relating to range-finding apparatus

Country Status (1)

Country Link
GB (1) GB218548A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443624A (en) * 1942-04-23 1948-06-22 Bell Telephone Labor Inc Range computer
US2545655A (en) * 1940-03-11 1951-03-20 Computer
US2698134A (en) * 1940-08-27 1954-12-28 Bosch Arma Corp Electric computer
FR2312766A1 (en) * 1975-05-26 1976-12-24 Saeme Remote measurement of luminous energy radiated by moving object - involves two optical detection elements and photosensitive element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545655A (en) * 1940-03-11 1951-03-20 Computer
US2698134A (en) * 1940-08-27 1954-12-28 Bosch Arma Corp Electric computer
US2443624A (en) * 1942-04-23 1948-06-22 Bell Telephone Labor Inc Range computer
FR2312766A1 (en) * 1975-05-26 1976-12-24 Saeme Remote measurement of luminous energy radiated by moving object - involves two optical detection elements and photosensitive element

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