US3790248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Target sighting systems
Assignee: Individual
•
Filing: 1971-09-07
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Granted: 1974-02-05
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Expires: 1991-09-07
Abstract
Abstract A target sighting system, principally for a fighting vehicle having a main armament which can be aimed by a gunner by means of a sighting periscope rotatable in azimuth, is provided with a separate periscope, principally for a vehicle commander, which can be independently rotated in azimuth, and optical passageways in each periscope system which provide a direct optical path between the periscopes when they are aligned in azimuth so that the view through the gunner''s periscope can be observed through the other periscope.
Inventors
- 👤 A Kellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:48
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/26; F41H5/266; G; G02; G02B; G02B23/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A target sighting system comprising a first and a second sighting periscope, means so connecting said periscopes that each is rotatable in azimuth relative to the other, a directable device fixed in azimuth in relation to the second periscope, a graticule in the sighting system of the second periscope which graticule indicates the direction of the directable device, each periscope having an optical pathway in fixed relation to its azimuth, which pathways are aligned when the first and second periscopes are aligned in azimuth, whereby a direct optical path is then provided between the periscopes, and an observer viewing through the first periscope can observe the view through the second periscope and a superimposed image of its graticule.
Claim 2
Dependent Claim
118 words
A target sighting system comprising a first and a second sighting periscope, means so connecting said periscopes that each is rotatable in azimuth relative to the other, a directable device fixed in azimuth in relation to the second periscope, a graticule in the sighting system of the second periscope which graticule indicates the direction of the directable device, each periscope having an optical pathway in fixed relation to its azimuth, which pathways are aligned when the first and second periscopes are aligned in azimuth, whereby a direct optical path is then provided between the periscopes, and an observer viewing through the first periscope can observe the view through the second periscope and a superimposed image of its graticule.
Claim 3
Dependent Claim
21 words
A target sighting system according to claim 1 wherein the directable device is the stabilised main armament of a fighting vehicle.
Claim 4
Dependent Claim
46 words
A target sighting system according to claim 1 wherein the second periscope has a sighting mirror, means coupling said sighting mirror to said directable device in alignment with the azimuth of said device, and means linking said sighting mirror with the elevation of said directable device.
Claim 5
Dependent Claim
149 words
A target sighting system according to claim 3 wherein the first sighting periscope has a first viewing position at which the view from the periscope can be observed, a magnifying optical system having a second viewing position at which a magnified view can be observed; and a mirror device provided with lower and upper reflecting faces at which can be placed in a first position at which it is excluded from the optical system of the first periscope and which can be placed in a second position at which it can reflect from its upper face light rays from the first periscope to the first viewing position of the first periscope, and, when the two periscopes are aligned in azimuth, simultaneously reflect from its lower face rays From the second periscope through the magnifying optical system to provide a magnified view of the target at the second viewing position.
Claim 6
Dependent Claim
33 words
A target sighting system according to claim 4 wherein when the mirror device is in its first position, light rays from the first periscope are arranged to pass through the magnifying optical system.
Claim 7
Dependent Claim
28 words
A target sighting system according to claim 4 in which said magnifying optical system is a lens system providing a magnification in the range from X8 to X20.
Claim 8
Dependent Claim
34 words
A target sighting system according to claim 1 wherein the first sighting periscope has a sighting mirror which can be moved so as to change the elevation of the view of the first periscope.
Claim 9
Dependent Claim
51 words
A target sighting system according to claim 7 including a further directable device, means coupling the sighting mirror of the first periscope to said further directable device in alignment with the azimuth of said further directable device, and means linking said sighting mirror with the elevation of said further directable device.
Claim 10
Dependent Claim
18 words
A target sighting system according to claim 8 wherein the said further directable device is a light gun.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |