Source: https://patents.google.com/patent/US4945646A/en
Timestamp: 2019-05-23 19:27:25
Document Index: 25871865

Matched Legal Cases: ['art 17', 'arts 17', 'art 17', 'art 17', 'art 17', 'arts 17']

US4945646A - Arrangement in a luminous dot sighting instrument - Google Patents
Arrangement in a luminous dot sighting instrument Download PDF
US4945646A
US4945646A US07/269,787 US26978788A US4945646A US 4945646 A US4945646 A US 4945646A US 26978788 A US26978788 A US 26978788A US 4945646 A US4945646 A US 4945646A
US07/269,787
John A. I. Ekstrand
1984-11-15 Priority to SE84057249 priority Critical
1984-11-15 Priority to SE8405724A priority patent/SE456936B/en
1986-05-09 Application filed by Interaims AB filed Critical Interaims AB
1988-11-09 Assigned to INTERAIMS AKTIEBOLAG reassignment INTERAIMS AKTIEBOLAG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EKSTRAND, JOHN A. I.
1990-08-07 Publication of US4945646A publication Critical patent/US4945646A/en
The optical system of the luminous dot sighting instrument, i.e. the "sighting instrument proper" which is designated 15 in FIG. 1, comprises a lens system having a mirror and a light source of known type connected to the electronic system 16 which also is previously known. Both systems are generally cylindrical or tubular and interconnected by means of a supporting device in the form of a twin tube member 17 (FIG. 2). To reduce the height of the sighting instrument, including the twin tube member 17, a foot 18 and means for vertical and horizontal angular adjustment in relation to a firearm, the present invention provides a device for vertical and horizontal angular adjustment which is operative between the optical section 15 of the luminous dot sighting instrument and that part 17a of the twin tube member 17 which encompasses the optical system 15, whereby angular adjustment is made possible, such that a line between the centre axes of the two tubular parts 17a, 17b and the vertical plane is reduced from a normal angle of 90° to, for example, 60°, as in the embodiment shown in FIG. 2. It should, however, be noted that this angle in some cases--depending upon the type of firearm--may be even smaller. On a sporting rifle, however, an angle of up to 60° is acceptable to give free vision laterally of the luminous dot sighting instrument.
By turing the twin tube member, such that its rear end (in FIG. 2) constitutes the front end, it can be mounted on firearms equipped with a loading mechanism for left-handed marksmen, and if the twin tube member is turned about the axis of tubular part 17a into such a position that the hole for the screw 23a will be facing downwardly towards the rail 19, the angle of 60° is changed to 30°. In view hereof, turnable twin tube members should have holes for adjusting screws in three sides, in which case the underside shown in FIG. 2 may have the same shape as the upper side. In addition, such a twin tube member can be turned about the axis of tubular part 17a such that the tube part 17b thereof will be inclined obliquely upwards. By completely dispensing with the lugs shown in FIG. 2 in which the holes for the adjusting screws 23a, 23b are formed, such that both halves of the twin tube member will obtain circularly cylindrical circumferential surfaces, except where they are united by the web 17c, the member can be adjusted to any desired angle merely by being turned relative to the foot 18 and the rail 18b. The twin tube member may be formed in advance with several holes for several different angular positions, or the holes can be formed for the desired angular position for each particular use.
FIG. 3, however, illustrates a problem encountered in luminous dot sighting instruments provided with "inner adjustment", i.e. adjustment of the optical system 15 with its built-in light source relative to an outer tube, such as the tube formed by the tubular parts 17a, 21a, 21b. For example, the tube 15a cannot be inclined further than into engagement with the outer tube 17a, 21a, 21b at the rear or front end of the tube 15a, and the viewing field decreases in response to the angle of inclination. The lens 24 with its mirror coating must be inclined relative to the axis 13 (FIG. 1) because its plane must be facing the light source. As a result, the viewing field tends to decrease even more. A further disadvantage is that the inclination of the lens 24 within the tube 15a causes the cylindrical circumferential edge of the lens to form an angle deviating from 90° relative to the plane of inclination. Although this is of little importance to the proper functioning, its significance from the economic point of view is considerable because it is far more expensive to make a lens with a circumferential edge which is inclined to the lens plane than to make a lens whose circumferential edge coincides with the surface of a cylinder coaxial with an axis perpendicular to the lens plane and extending through the centre of the lens plane. The additional cost of such a lens, multiplied by tens of thousands of lenses, may entail a large expense.
FIG. 6 shows a more correct proportion of the magnitude of the angle relative to the length and diameter proportions of the tube 1. Here, the length of the angled portion approximately corresponds to what is necessary for mounting a lens 24 with a circumferential edge of the type shown in FIG. 5, i.e. a circumferential edge which is coaxial with the central axis perpendicular through the lens plane. The angling degree need not be large, for example, 2°-5° or, preferably 4°, as in FIG. 6, or somewhat less.
1. An arrangement in a luminous dot sighting instrument comprising:
means comprising adjusting screws disposed between said tubular housing and said supporting device for adjustment of the vertical and horizontal angular position of said tubular housing in relation to said supporting device; and
elastic biasing means acting between said supporting device and said tubular housing for providing angularly adjustable resilient support of said tubular housing in said supporting device and for urging said tubular housing against said adjusting screws, said elastic biasing means acting on said tubular housing at a position axially spaced from said adjusting screws and comprising an annular elastic element encompassed by said supporting device and encompassing said tubular housing about a region adjacent one end of said tubular housing, said elastic biasing means exerting force components on said tubular hosuing which produce an obliquely directed bias on said tubular housing which tends to tilt said tubular housing into engagement with said adjusting screws; position axially spaced from said adjusting screws and comprising an annular elastic element encompassed by said supporting device and encompassing said tubular housing about a region adjacent one end of said tubular housing, said elastic biasing means exerting force components on said tubular housing which produce an obliquely directed bias on said tubular housing which tends to tilt said tubular housing into engagement with said adjusting screws;
said annular elastic element being positioned between support members carried by said supporting device which exert an axially compressive force on said annular elastic element, and said tubular housing carries a circumferential ring which imparts an axial force component from said annular elastic element to said tubular housing.
2. The arrangement in a luminous dot sighting instrument according to claim 1, wherein:
said annular elastic element encompasses and acts upon said end portion; and
said lens means is mounted in said end portion in a position perpendicular to the axis of said end portion, said lens means having a substantially cylindrical circumferential surface defining an axis which coincides with the axis of said end portion and with the main axis of a beam of rays emanating from said light source and impinging on the center of said semi-transparent mirror.
3. The arrangement in a luminous dot sighting instrument according to claim 1 and further comprising:
a coupling device, separably carried on said supporting device, for detachable interconnection of a telescopic attachment to said sighting instrument, said coupling device comprising (1) an angularly adjustable nut provided with means for separably coupling to a telescopic attachment and (2) locking means for applying a frictional force to said angularly adjustable nut to hold an adjusted position of said adjustable nut.
4. The arrangement in a luminous dot sighting instrument according to claim 3, wherein said locking means comprises a locking ring.
6. An arrangement in a luminous dot sighting instrument comprising:
elastic biasing means acting between said supporting device and said tubular housing for providing angularly adjustable resilient support of said tubular housing in said supporting device and for urging said tubular housing against said adjusting screws, said elastic biasing means acting on said tubular housing at a position axially spaced from said adjusting screws and comprising an annular elastic element encompassed by said supporting device and encompassing said tubular housing about a region adjacent one end of said tubular housing, said elastic biasing means exerting force components on said tubular housing which produce an obliquely directed bias on said tubular housing which tends to tilt said tubular housing into engagement with said adjusting screws;
7. The arrangement in a luminous dot sighting instrument according to claim 6, wherein:
8. The arrangement in a luminous dot sighting instrument according to claim 6, wherein said tubular housing carries an annular flange with a support face, and said annular elastic element presents an end face abutting said support face, said end face lying in a plane which is oblique to the axis of said annular elastic element.
9. The arrangement in a luminous dot sighting instrument according to claim 6, and further comprising:
a coupling device, separably carried on said supporting device, for detachable interconnection of a telescopic attachment to said sighting instrument, said coupling device comprising (1) an angularly adjustable nut provided with means for separably coupling to a telescopic attachment and (2) locking means for applying a frictional force to said angularly adjustable nut to hold on adjusted position of said adjustable nut.
10. The arrangement in a lumionus dot sighting instrument according to claim 9, wherein said locking means comprises a locking ring.
US07/269,787 1984-11-15 1986-05-09 Arrangement in a luminous dot sighting instrument Expired - Fee Related US4945646A (en)
SE84057249 1984-11-15
SE8405724A SE456936B (en) 1984-11-15 1984-11-15 Device in a dot sight
US4945646A true US4945646A (en) 1990-08-07
ID=20357757
US07/269,787 Expired - Fee Related US4945646A (en) 1984-11-15 1986-05-09 Arrangement in a luminous dot sighting instrument
US (1) US4945646A (en)
AU (1) AU5960786A (en)
SE (1) SE456936B (en)
WO (1) WO1987007005A1 (en)
GB2277606A (en) * 1993-04-29 1994-11-02 Aimpoint Ab Optical sight having biaspheric element with partially reflecting layer
GB2292465A (en) * 1994-03-02 1996-02-21 Clive Rawlinson Paige Optical sight with part-reflective aspheric surface and mount
RU2586014C1 (en) * 2014-10-29 2016-06-10 Акционерное общество "Информационные спутниковые системы" имени академика М.Ф. Решетнёва" Support device
WO2000055670A1 (en) * 1999-03-17 2000-09-21 Vektor A Division Of Denel (Pty.) Ltd. An optical sighting device
US2180184A (en) * 1937-03-31 1939-11-14 William R Weaver Rifle telescope sight
CH508190A (en) * 1969-05-14 1971-05-31 Rheinmetall Gmbh Optical sighting device for rifles
AU1857470A (en) * 1969-10-13 1972-02-10 Inge Sloot Ruder Nils Sight for use on firearms
AT328204B (en) * 1971-12-09 1976-03-10 Kahles Friedrich Dipl Ing Scope
1984-11-15 SE SE8405724A patent/SE456936B/en not_active IP Right Cessation
1986-05-09 WO PCT/SE1986/000219 patent/WO1987007005A1/en unknown
1986-05-09 AU AU59607/86A patent/AU5960786A/en not_active Abandoned
1986-05-09 US US07/269,787 patent/US4945646A/en not_active Expired - Fee Related
GB2277606B (en) * 1993-04-29 1996-07-31 Aimpoint Ab An assembly of a light emitting means and an optical element of a parallel free sight.
SE8405724L (en) 1986-05-16
WO1987007005A1 (en) 1987-11-19
SE456936B (en) 1988-11-14
AU5960786A (en) 1987-12-01
SE8405724D0 (en) 1984-11-15
US20020042999A1 (en) 2002-04-18 Multiple pin sight for an archery bow
EP1693638B1 (en) 2008-11-19 Mount for firearms
Owner name: INTERAIMS AKTIEBOLAG, SWEDEN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EKSTRAND, JOHN A. I.;REEL/FRAME:005005/0500