Rifle Sighting Device Uses Mirror
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Title (Dublin Core)
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Rifle Sighting Device Uses Mirror
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Article Title and/or Image Caption (Dublin Core)
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Rifle Sighting Device Uses Mirror
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extracted text (Extract Text)
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AT THE University of Wis-
consin, this sighting and
aiming device is used to teach
the alignment of gun sights by
triangulation. A mirror on a
swivel at the far end reflects a
target held at the side of the
rifle, thus doubling the effective
range.
The rifle has an eyepiece in
addition to peep and front sights
and is mounted solidly at one
end of the stand. On a board to
its right is a sheet of plain paper
facing the marksman. A forked
stick fits over the board in such
a manner that one leg holds a
small target toward the mirror.
The other leg has a hole in it di-
rectly behind the center of the
bull's-eye.
By sighting through the eye-
piece and adjusting the leaf, the
front rifle sight is centered in
the peep sight. The marksman
then adjusts the target to obtain
a bead on the bull's-eye reflected
in the mirror. This he records on
the paper with a pencil mark
made through the hole in the
rear leg. Three trials, before
each of which the target is
moved out of position for a fresh
start, should result in marks
close enough together to form a
triangle no larger than a dime.
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Language (Dublin Core)
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eng
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Date Issued (Dublin Core)
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1943-06
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pages (Bibliographic Ontology)
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HW 221
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Rights (Dublin Core)
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Public Domain (Google digitized)
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Archived by (Dublin Core)
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Matteo Ridolfi
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Alberto Bordignon (Supervisor)
Popular Science Monthly, v. 142, n. 6, 1943
