FR498611A - Differential device for direction finding devices - Google Patents

Differential device for direction finding devices

Info

Publication number
FR498611A
FR498611A FR498611DA FR498611A FR 498611 A FR498611 A FR 498611A FR 498611D A FR498611D A FR 498611DA FR 498611 A FR498611 A FR 498611A
Authority
FR
France
Prior art keywords
differential device
direction finding
finding devices
devices
differential
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
Other languages
French (fr)
Inventor
Aldo Castiglioni
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR498611A publication Critical patent/FR498611A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/08—Periscopes

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR498611D 1918-05-22 1919-04-24 Differential device for direction finding devices Expired FR498611A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT498611X 1918-05-22

Publications (1)

Publication Number Publication Date
FR498611A true FR498611A (en) 1920-01-16

Family

ID=1533797

Family Applications (1)

Application Number Title Priority Date Filing Date
FR498611D Expired FR498611A (en) 1918-05-22 1919-04-24 Differential device for direction finding devices

Country Status (1)

Country Link
FR (1) FR498611A (en)

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