GB190407307A - Improvements in Apparatus for Adjusting the Sights of Ordnance and Small Arms. - Google Patents

Improvements in Apparatus for Adjusting the Sights of Ordnance and Small Arms.

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Publication number
GB190407307A
GB190407307A GB190407307DA GB190407307A GB 190407307 A GB190407307 A GB 190407307A GB 190407307D A GB190407307D A GB 190407307DA GB 190407307 A GB190407307 A GB 190407307A
Authority
GB
United Kingdom
Prior art keywords
tube
gun
sight
prism
along
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
George Forbes
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 GB190407307A publication Critical patent/GB190407307A/en
Expired legal-status Critical Current

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Abstract

7307. Forbes, G. March 26. Optical instruments for testing parallelism of the axis of a gun with the zero axis of the sight. A tube c, carrying at its rear end a lens e of focal length equal to the length of the bore of the gun, is centered in the muzzle a' of the gun by a slitted tube b with tapered ribs b<1> co-acting with similar ribs c<1> on the tube c when the nut d is screwed up. A square tube f is fitted in the tube c, as shown, and is provided with two right-angled prisms g, h, at such a distance apart that a ray of light, from a central aperture, or illuminated cross-wires, in the breech of the gun, is reflected back horizontally by the prism h along the zero line of sight j-j. The prism g is preferably formed with two reflecting-faces 2, intersecting at rightangles along the edge 4.
GB190407307D 1904-03-26 1904-03-26 Improvements in Apparatus for Adjusting the Sights of Ordnance and Small Arms. Expired GB190407307A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190407307T 1904-03-26

Publications (1)

Publication Number Publication Date
GB190407307A true GB190407307A (en) 1905-01-26

Family

ID=32163188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190407307D Expired GB190407307A (en) 1904-03-26 1904-03-26 Improvements in Apparatus for Adjusting the Sights of Ordnance and Small Arms.

Country Status (1)

Country Link
GB (1) GB190407307A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269920B (en) * 1966-01-03 1968-06-06 Rheinmetall Gmbh Finish line checker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269920B (en) * 1966-01-03 1968-06-06 Rheinmetall Gmbh Finish line checker

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