GB190604089A - Improvements in Field Glasses - Google Patents

Improvements in Field Glasses

Info

Publication number
GB190604089A
GB190604089A GB190604089DA GB190604089A GB 190604089 A GB190604089 A GB 190604089A GB 190604089D A GB190604089D A GB 190604089DA GB 190604089 A GB190604089 A GB 190604089A
Authority
GB
United Kingdom
Prior art keywords
focusing
collar
secured
field glasses
central rod
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
John Henry Barton
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 GB190604089A publication Critical patent/GB190604089A/en
Expired legal-status Critical Current

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  • Telescopes (AREA)

Abstract

4089. Barton, J. H. Feb. 19. Field glasses. - The focusing is effected by means of, a differential - screw motion. The focusing-nut E is secured to a sleeve B, upon the interior of which are cut screwthreads B', B<2> of different pitches. The finer of these threads engages with a thread on a collar C attached to the body of the instrument, and the other engages with a thread formed upon the central rod A, which is secured to the eyepiece tube. In a modification, the central rod is fixed, and the collar C is arranged to move with the eyepiece.
GB190604089D 1906-02-19 1906-02-19 Improvements in Field Glasses Expired GB190604089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190604089T 1906-02-19

Publications (1)

Publication Number Publication Date
GB190604089A true GB190604089A (en) 1906-11-15

Family

ID=32433379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190604089D Expired GB190604089A (en) 1906-02-19 1906-02-19 Improvements in Field Glasses

Country Status (1)

Country Link
GB (1) GB190604089A (en)

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