GB191511836A - Improvements in Attachments for Protecting the Objective Lens of Telescopes from Spray or the like. - Google Patents

Improvements in Attachments for Protecting the Objective Lens of Telescopes from Spray or the like.

Info

Publication number
GB191511836A
GB191511836A GB191511836DA GB191511836A GB 191511836 A GB191511836 A GB 191511836A GB 191511836D A GB191511836D A GB 191511836DA GB 191511836 A GB191511836 A GB 191511836A
Authority
GB
United Kingdom
Prior art keywords
wheel
casing
telescope
apertures
holes
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
Inventor
Henry Croskey Mustin
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
Publication of GB191511836A publication Critical patent/GB191511836A/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
    • G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)

Abstract

11,836. Mustin, H. C. Aug. 16. Protecting object-glasses from rain, spray, and the like.-Water, smoke, &c. is prevented from coming into contact with the objective of a telescope, periscope, &c. by moving means such as a rotating wheel. As shown, a wheel comprising disks 21, 22 and radial or curved vanes 23 is rotated through gear-wheels 15, 16, 18 from a power-wheel 20, or a flexible shaft, motor, &c., and is contained in a casing secured to the telescope 1 in front of the objective 2. The casing has apertures 5, 9, 12 the centres of which are in the optical axis, and the wheel has apertures in each disk which pass between the apertures 9, 12 and are preferably equal in number to and between each pair of vanes and nearer to their receding edges than to their advancing edges. Water &c., striking the objective end of the telescope and entering the casing, is thrown out through holes 25 in the casing. The holes 25 may be closed by a rotatable cap 30, which has holes 31 and an aperture 34 registering with the aperture 12. The wheel is rotated sufficiently rapidly to prevent flickering of the image and does not affect the direction of the line of sight.
GB191511836D 1915-08-16 1915-08-16 Improvements in Attachments for Protecting the Objective Lens of Telescopes from Spray or the like. Expired GB191511836A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191511836T 1915-08-16

Publications (1)

Publication Number Publication Date
GB191511836A true GB191511836A (en) 1916-02-10

Family

ID=32650357

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191511836D Expired GB191511836A (en) 1915-08-16 1915-08-16 Improvements in Attachments for Protecting the Objective Lens of Telescopes from Spray or the like.

Country Status (1)

Country Link
GB (1) GB191511836A (en)

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