GB573617A - Improvements in and relating to the illumination of mariner's compass cards - Google Patents

Improvements in and relating to the illumination of mariner's compass cards

Info

Publication number
GB573617A
GB573617A GB653344A GB653344A GB573617A GB 573617 A GB573617 A GB 573617A GB 653344 A GB653344 A GB 653344A GB 653344 A GB653344 A GB 653344A GB 573617 A GB573617 A GB 573617A
Authority
GB
United Kingdom
Prior art keywords
partition
mariner
illumination
relating
hughes
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
GB653344A
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.)
ROY BAGOT
Hughes Henry and Son Ltd
Original Assignee
ROY BAGOT
Hughes Henry and Son Ltd
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 ROY BAGOT, Hughes Henry and Son Ltd filed Critical ROY BAGOT
Priority to GB653344A priority Critical patent/GB573617A/en
Publication of GB573617A publication Critical patent/GB573617A/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
    • 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)
  • Artificial Fish Reefs (AREA)

Abstract

573,617. Magnetic compasses. HUGHES & SON, Ltd., H., BAGOT, R., and HUGHES, A. J. April 7, 1944, No. 6533. [Class 97 (ii)] A glass filter m, coloured so as to cut off a considerable part of the blue end of the spectrum and carried by a non-magnetic opaque partition a, is interposed between the light source p and the compass bowl o. The filter m is fastened to the partition a by a clamping ring h having bayonet slots to engage corresponding studs on the partition a.
GB653344A 1944-04-07 1944-04-07 Improvements in and relating to the illumination of mariner's compass cards Expired GB573617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB653344A GB573617A (en) 1944-04-07 1944-04-07 Improvements in and relating to the illumination of mariner's compass cards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB653344A GB573617A (en) 1944-04-07 1944-04-07 Improvements in and relating to the illumination of mariner's compass cards

Publications (1)

Publication Number Publication Date
GB573617A true GB573617A (en) 1945-11-28

Family

ID=9816229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB653344A Expired GB573617A (en) 1944-04-07 1944-04-07 Improvements in and relating to the illumination of mariner's compass cards

Country Status (1)

Country Link
GB (1) GB573617A (en)

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