FR2456939A1 - Dispositif d'eclairage d'une boussole spherique - Google Patents

Dispositif d'eclairage d'une boussole spherique

Info

Publication number
FR2456939A1
FR2456939A1 FR8009624A FR8009624A FR2456939A1 FR 2456939 A1 FR2456939 A1 FR 2456939A1 FR 8009624 A FR8009624 A FR 8009624A FR 8009624 A FR8009624 A FR 8009624A FR 2456939 A1 FR2456939 A1 FR 2456939A1
Authority
FR
France
Prior art keywords
reflection
spherical
graduated scale
compass
effected
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.)
Pending
Application number
FR8009624A
Other languages
English (en)
Inventor
Holger Hugo Meiling
Ernst Harry Eliasson
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.)
INSTRUMENT VERKEN AB
Original Assignee
INSTRUMENT VERKEN AB
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 INSTRUMENT VERKEN AB filed Critical INSTRUMENT VERKEN AB
Publication of FR2456939A1 publication Critical patent/FR2456939A1/fr
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/20—Observing the compass card or needle
    • G01C17/24—Illumination

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Details Of Measuring Devices (AREA)

Abstract

DISPOSITIF POUR BOUSSOLES SPHERIQUES A LIRE DANS L'OBSCURITE, QUI ECLAIRE UNE SECTION D'UNE GRADUATION DE RUBAN SUR UNE CARTE 10 DANS UNE CAPSULE DE BOUSSOLE ET QUI ECLAIRE DES LIGNES DE FOI 7A-7C PLACEES ENTRE LA CAPSULE ET LA CARTE ET CONTRE LESQUELLES EST LUE LA GRADUATION. CE DISPOSITIF SE COMPOSE D'UNE LAMPE 12 MONTEE DANS UN COUVERCLE 11 PLACE DE TELLE FACON PAR RAPPORT A LA CAPSULE QU'IL N'EMPECHERA PAS LA LECTURE DE LA GRADUATION. UNE QUANTITE IMPORTANTE DE LUMIERE EMISE DE LA LAMPE EST DIRIGEE VERS LA SURFACE INTERNE INCURVEE DE LA PARTIE TRANSPARENTE 1A DE LA CAPSULE A TRAVERS LAQUELLE ON PEUT LIRE LA CARTE ET EST REFLECHIE PAR CETTE SURFACE POUR FRAPPER ET ECLAIRER LADITE SECTION DE GRADUATION ET LESDITES LIGNES DE FOI. CE DISPOSITIF PEUT AUSSI ETRE UTILISE POUR ECLAIRER UNE GRADUATION D'INCLINOMETRE 14, SUR L'EXTERIEUR DE LA CAPSULE.
FR8009624A 1979-05-15 1980-04-29 Dispositif d'eclairage d'une boussole spherique Pending FR2456939A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7904266A SE414548B (sv) 1979-05-15 1979-05-15 Anordning vid kupolkompasser

Publications (1)

Publication Number Publication Date
FR2456939A1 true FR2456939A1 (fr) 1980-12-12

Family

ID=20338062

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8009624A Pending FR2456939A1 (fr) 1979-05-15 1980-04-29 Dispositif d'eclairage d'une boussole spherique

Country Status (2)

Country Link
FR (1) FR2456939A1 (fr)
SE (1) SE414548B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631046C (de) * 1929-05-11 1936-06-11 Pioneer Instr Company Inc Vorrichtung zur Beleuchtung eines magnetischen Fluessigkeitskompasses
US2738412A (en) * 1952-11-07 1956-03-13 Nye S Spencer Compass illuminating assembly
US3029334A (en) * 1958-12-26 1962-04-10 Sperry Rand Corp Illuminating means for direct reading instruments

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631046C (de) * 1929-05-11 1936-06-11 Pioneer Instr Company Inc Vorrichtung zur Beleuchtung eines magnetischen Fluessigkeitskompasses
US2738412A (en) * 1952-11-07 1956-03-13 Nye S Spencer Compass illuminating assembly
US3029334A (en) * 1958-12-26 1962-04-10 Sperry Rand Corp Illuminating means for direct reading instruments

Also Published As

Publication number Publication date
SE414548B (sv) 1980-08-04

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Legal Events

Date Code Title Description
DI Inadmissibility of an action of restoration