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US 3,938,875 AGranted
Sight for use on hand firearms and a method of using it
OwnerNils Inge Algot Ruderinventor
Life of this patent
Estimating the term…
Abstract
A sighting device for a firearm to be used with both eyes open is provided, wherein a tubular housing, open at the end nearest the shooter, includes means for forming a virtual image of a small luminous spot. When viewed by the shooter, the spot appears to be at infinity. Means are provided to adjust the position of the spot within the housing.
Claims21
A sighting device for a firearm including in combination:
- a housing;
- means for mounting said housing on a firearm comprising an outer tube adapted to receive said housing, said tube being closed at its forward end and open at its rearward end, bearing means within said tube for engaging and pivotally supporting one end of said housing, and adjustable supporting means within said tube for supporting said housing and for adjusting the angular position of said housing within said tube, said housing extending axially into said outer tube and forming at said rearward end of said tube an opening to be looked into by a shooter when aiming the firearm;
- a light unit mounted on the forward end of said housing and comprising a light-collecting member of a luminous, light-diffusing and light-transmitting material, said light-collecting member having a substantial surface area exposed to ambient light, and being constructed to emit light of a first color from a rearwardly-facing surface when exposed to said ambient light;
- said light unit further comprising light source means adapted to emit light of a second color from said rearwardly-facing surface, whereby said emitted light varies from said first color to said second color as the intensity of said ambient light varies;
- aperture means in said housing providing an opening of circular configuration to form of light emitted by said light-collecting member a small luminous spot visible through said opening at the rearward end of said tube;
- said adjustable supporting means for adjusting the angular position of said housing within said tube further controlling the position of said aperture means in mutually perpendicular directions in relation to the axis of said outer tube;
- and
- convergent lens means at the rearward end of said housing in the path of the light forming said luminous spot, said convergent lens being adjusted to make a virtual image of said luminous spot at an infinite distance, as viewed through said opening.
5 more elements
A sighting device for a firearm including in combination:
- a housing;
- means for mounting said housing on a firearm, including an outer tube for receiving said housing and means for adjusting the angular position of said housing within said tube, said housing and said tube having a rearward opening to be looked into by a shooter when aiming the firearm;
- a light unit carried by said housing and including a light-collecting member of a luminous material having a substantial surface exposed to ambient light, said luminous material emitting light of a first color in a rearward direction;
- said light unit further comprising light source means adapted to emit light of a second color from said rearwardly-facing surface, whereby said emitted light varies from said first color to said second color as the intensity of said ambient light varies;
- aperture means in said housing providing an opening of circular configuration to form of light emitted by said light collecting member a small luminous spot visible through said rearward opening, the luminance of said spot varying with the intensity of the ambient light;
- and convergent lens means in said housing to form a virtual image of said luminous spot at an infinite distance, as viewed through said rearward opening.
3 more elements
A sighting device for a firearm including, in combination:
- a housing having a conical portion and a cylindrical portion, one end of said cylindrical portion joining the small end of said conical portion;
- outer tube means for mounting said housing on a firearm;
- means for pivotally mounting said housing within said outer tube including bearing means at one end of said outer tube and a bearing surface formed by said housing at the large end of said conical portion, the bearing surface on said housing being pivotally supported by said bearing means so that said housing extends axially into said outer tube and forms at said large end a rearward opening to be looked into by a shooter when aiming the firearm;
- resilient means fitted into said one end of said outer tube to press said bearing surface into engagement with said bearing means;
- a light unit mounted to said housing at the other end of said cylindrical portion, said light unit comprising a daylight collecting member of a luminous light transmitting material having a substantial exposed surface;
- a dome-shaped cap of light-transmitting material carried by the other end of said outer tube, said daylight collecting member being received in the interior of said cap;
- a diaphragm providing a central opening of at least substantially circular configuration mounted in said cylindrical portion of said housing at said other end thereof and inwardly of said daylight collecting member to form of light emitted by said light unit a small luminous spot visible through said rearward opening;
- means for adjusting the angular position of said housing in said outer tube to control the position of said aperture means in mutually perpendicular directions and in relation to the outer tube, said adjusting means comprising two mutually perpendicular adjustable supports and an opposite resilient support for said housing in said tube;
- and convergent lens means in said housing at said large end of said conical portion in the path of the light forming said luminous spot, said convergent lens being adjusted to make a virtual image of said luminous spot at an infinite distance as viewed through said rearward opening.
6 more elements
Dependencies are inferred from the claim text.