US3594062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sighting telescope with flexible eyeguard
Assignee: Rank Organization Ltd
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Filing: 1969-04-10
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Granted: 1971-07-20
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Expires: 1989-04-10
Abstract
Abstract Light-obscuring means are provided for a telescope having internal illumination means to prevent the escape of such illumination through the eyepiece of the telescope except when an observer applies his eye to the eyepiece. In each of the examples given, an eye guard is displaceable when the observer presses his face against the eyepiece and this causes the movement of shutter flaps that are attached to the eye guard away from a setting in which the light path through the eyepiece is closed. The eye guard is of a flexible material the resilience of which returns it, and therefore also the shutter flaps to their previous positions when the observer moves away from the eyepiece.
Inventors
- 👤 David Robert Disley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:27
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/32; G02B27/34; G02B23/00; G02B23/12; G02B23/125
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
200 words
In a telescope provided with internal illumination means transmitting light to an eyepiece, the improvement consisting of an eye guard mounted at said eyepiece, said eye guard comprising a flexible portion connected to said eyepiece and a rim portion displaceable relative to said eyepiece by flexing of said flexible portion, said flexible portion constituting biasing means urging said rim portion to an end position from which it is movable by the application of pressure when an observer''s eye is applied to the telescope, shutter means being disposed within the eyepiece comprising at least two flaps that overlap each other in the closed position and are attached to said flexible portion of eye guard, said flexible portion being disposed when said rim portion is in said end position so that the flaps overlap and bear upon each other to obscure the passage of light from the eyepiece but being arranged to flex upon movement of the rim portion from said end position and thereby swing the flaps attached thereto to an open position away from the plane in which they are located when in the closed position and clear of the light path from said internal illumination means through the eyepiece.
Claim 2
Dependent Claim
200 words
In a telescope provided with internal illumination means transmitting light to an eyepiece, the improvement consisting of an eye guard mounted at said eyepiece, said eye guard comprising a flexible portion connected to said eyepiece and a rim portion displaceable relative to said eyepiece by flexing of said flexible portion, said flexible portion constituting biasing means urging said rim portion to an end position from which it is movable by the application of pressure when an observer''s eye is applied to the telescope, shutter means being disposed within the eyepiece comprising at least two flaps that overlap each other in the closed position and are attached to said flexible portion of eye guard, said flexible portion being disposed when said rim portion is in said end position so that the flaps overlap and bear upon each other to obscure the passage of light from the eyepiece but being arranged to flex upon movement of the rim portion from said end position and thereby swing the flaps attached thereto to an open position away from the plane in which they are located when in the closed position and clear of the light path from said internal illumination means through the eyepiece.
Claim 3
Dependent Claim
24 words
A telescope according to claim 1, each flap is attached along a portion of its periphery to a contiguous location on the eye guard.
Claim 4
Dependent Claim
45 words
A telescope according to claim 1 comprising a flexible strip for each flap by means of which that flap is attached to said flexible portion, said flexible strip being positioned to be flexed with said flexible eye guard portion by displacement of said rim portion.
Claim 5
Dependent Claim
80 words
A telescope according to claim 1 wherein the eye guard comprises a circular section wall region in which the diameter varies, said variation including a smaller diameter portion interposed between a larger diameter portion and an opening for the observer''s eye, said flaps lying in the region of said smaller diameter portion when they close the light path to the observer''s eye and being swingable forwardly to said larger diameter portion when the eye guard is moved against biasing means.
Claim 6
Dependent Claim
29 words
A telescope according to claim 1 in which a peripheral portion of each flap is integrally connected to a contiguous location on the flexible portion of said eye guard.
References Cited (Backward Citations)
DE910142C
Cited
US3390931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |