US3963356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical sight
Assignee: Linde Sverige AB
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Filing: 1974-12-05
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Granted: 1976-06-15
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Expires: 1994-12-05
Abstract
Abstract An optical sight, which includes a light source and a lens system wherein the lens system is an image of the light source, serving as an aiming point to the pointer's eye. The lens system has a reflecting surface for reflection in the direction of the pointer's eye of radiation from the light source. Means are provided for making a periodic change of the luminance of the image of the light source with a frequency with the perceptibility range of the eye.
Inventors
- 👤 Klas Rudolf Wiklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:42
CPC Classifications
F; F41; F41G; F41G1/00; F41G1/30; G; G02; G02B; G02B23/00; G02B23/02; G02B23/10; G02B23/105; G02B27/00; G02B27/32; G02B27/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
An optical sight including a light source and a semi-transparent lens system wherein the lens system gives an image of the light source, serving as an aiming point, said lens system having a reflecting surface for reflection of said image in the direction of a pointer's eye, and means for periodically changing the luminance of the image of the light source with a frequency within the perceptibility range of the eye.
Claim 2
Dependent Claim
71 words
An optical sight including a light source and a semi-transparent lens system wherein the lens system gives an image of the light source, serving as an aiming point, said lens system having a reflecting surface for reflection of said image in the direction of a pointer's eye, and means for periodically changing the luminance of the image of the light source with a frequency within the perceptibility range of the eye.
Claim 3
Dependent Claim
28 words
An optical sight in accordance with claim 1, wherein the frequency of the periodic change is just below the upper limit of said perceptibility range of the eye.
Claim 4
Dependent Claim
45 words
An optical sight in accordance with claim 1, including ambient light controlling means for controlling the periodic change of the luminance to vary depending upon the ambient light conditions in a manner wherein the frequency of said periodic change is lower in weaker light conditions.
Claim 5
Dependent Claim
33 words
The optical sight in accordance with claim 3, wherein said ambient light controlling means includes a photoelectric device sensitive to ambient light conditions, said photoelectric device being operative to control said light source.
Claim 6
Dependent Claim
50 words
An optical sight in accordance with claim 3, wherein said means for controlling periodic change in the luminance of the image of the light source includes means for varying the luminance in accordance with ambient light conditions in a manner such that the luminance is lower in weaker light conditions.
Claim 7
Dependent Claim
53 words
The optical sight in accordance with claim 1, wherein said means for controlling periodic change in the luminance of the image of the light source is operative to vary the luminance of the light source depending upon ambient light conditions in such a way that the luminance is lower in weaker light conditions.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |