US3764200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital indicating device
Assignee: PNEUMOTECH AG
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Filing: 1972-04-12
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Granted: 1973-10-09
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Expires: 1992-04-12
Abstract
Abstract A reflecting element has at least one curved surface having a first plane of symmetry and being operative for reflecting incident light. A varying element is provided for varying the character of the reflector light and has a second symmetry paralleling the first plane. The elements are relatively moveable between an operative position and an inoperative position in which the varying element respectively varies and does not vary the character of light reflected by the reflecting element. An arrangement is provided for effecting such relative movement of the elements.
Inventors
- 👤 H Glattli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
134 words
A device of the character described, particularly a digital indicator, comprising a reflecting element provided with a curved reflecting surface bounding an opening through which incident light is admitted to be reflected by said reflecting surface, said reflecting surface having a first plane of symmetry; a varying element for varying the character of light reflected by said reflecting element and having a second plane of symmetry paralleling said first plane, said elements being relatively movable betweEn at least one operative position and an inoperative position in which said varying element is closer to and farther spaced from said opening and respectively varies and does not vary the character of light admitted through said opening and reflected by said reflecting element; and moving means for effecting relative movement of said elements between said positions thereof.
Claim 2
Independent Claim
134 words
A device of the character described, particularly a digital indicator, comprising a reflecting element provided with a curved reflecting surface bounding an opening through which incident light is admitted to be reflected by said reflecting surface, said reflecting surface having a first plane of symmetry; a varying element for varying the character of light reflected by said reflecting element and having a second plane of symmetry paralleling said first plane, said elements being relatively movable betweEn at least one operative position and an inoperative position in which said varying element is closer to and farther spaced from said opening and respectively varies and does not vary the character of light admitted through said opening and reflected by said reflecting element; and moving means for effecting relative movement of said elements between said positions thereof.
Claim 3
Dependent Claim
43 words
A device as defined in claim 15, said reflecting element having an indicating plane from which it is viewed to determine the character of reflected light; and wherein said varying element is so constructed that its projection onto such indicating plane approaches zero.
Claim 4
Dependent Claim
14 words
A device as defined in claim 15, wherein said varying element selectively reflects light.
Claim 5
Dependent Claim
14 words
A device as defined in claim 15, wherein said varying element selectively absorbs light.
Claim 6
Dependent Claim
24 words
A device as defined in claim 15, said varying element having at least one exposed surface; and further comprising a coating of luminescent material.
Claim 7
Dependent Claim
12 words
A device as defined in claim 15, said varying element being luminescent.
Claim 8
Dependent Claim
21 words
A device as defined in claim 15, said curved surface comprising two part-cylindrical surface portions having transversely spaced parallel cylinder axes.
Claim 9
Dependent Claim
29 words
A device as defined in claim 15, said reflecting element being box-shaped and being of right-angled cross-section in direction normal to the direction of relative movement of said elements.
Claim 10
Dependent Claim
47 words
A device as defined in claim 15, said reflecting element having an indicating plane from which it is to be viewed to determine the character of the reflected light; and further comprising a light-diffusing member provided on said reflecting element in the region of said viewing plane.
Claim 11
Dependent Claim
25 words
A device as defined in claim 15, wherein said varying element is movable with reference to said reflecting element between said operative and inoperative positions.
Claim 12
Dependent Claim
61 words
A device as defined in claim 15; further comprising at least one additional varying element, both of said varying elements being planar and located in parallel planes with freedom of independent movement with reference to said reflecting element; and wherein said moving means is operative for moving said varying elements independently of one another, each between said operative and inoperative positions.
Claim 13
Independent Claim
138 words
A device of the character described, particularly a digital indicator, comprising a reflecting element provided with at least one curved surface configurated as a surface of revolution having an axis of symmetry and being operative for reflecting incident light; a varying element for varying the character of light reflected by said reflecting element, said varying element being configurated as a cylinder surrounding said reflecting element and having a longitudinal axis coinciding with said axis of symmetry, said cylinder having an open end for viewing and for admission of light, said elements being relatively movable between at least one operative position and an inoperative position in which said varying element respectively varies and does not vary the character of light reflected by said reflecting element; and moving means for effecting relative movement of said elements between said positions thereof.
Claim 14
Independent Claim
138 words
A device of the character described, particularly a digital indicator, comprising a reflecting element provided with at least one curved surface configurated as a surface of revolution having an axis of symmetry and being operative for reflecting incident light; a varying element for varying the character of light reflected by said reflecting element, said varying element being configurated as a cylinder surrounding said reflecting element and having a longitudinal axis coinciding with said axis of symmetry, said cylinder having an open end for viewing and for admission of light, said elements being relatively movable between at least one operative position and an inoperative position in which said varying element respectively varies and does not vary the character of light reflected by said reflecting element; and moving means for effecting relative movement of said elements between said positions thereof.
Claim 15
Dependent Claim
31 words
A device as defined in claim 16, wherein said reflecting element is movable with reference to said varying element between said operative and inoperative positions, longitudinally of said axis of symmetry.
Claim 16
Dependent Claim
47 words
A device as defined in claim 15, said moving means comprising a resiliently flexible member operatively associated with one of said elements, said member being flexible for enabling movement of said one element to said operative position but inherently biasing said one element to said inoperative position.
Claim 17
Independent Claim
128 words
A device of the character described, particularly a digital indicator, comprising a reflecting element provided with at least one curved surface having a first plane of symmetry and operative for reflecting incident light, the curvature of said Surface being such that the intensity of the reflected light is substantially the same in all directions; a varying element for varying the character of light reflected by said reflecting element and having a second plane of symmetry paralleling said first plane, said elements being relatively movable between at least one operative position and an inoperative position in which said varying element respectively varies and does not vary the character of light reflected by said reflecting element; and moving means for effecting relative movement of said elements between said positions thereof.
Claim 18
Independent Claim
128 words
A device of the character described, particularly a digital indicator, comprising a reflecting element provided with at least one curved surface having a first plane of symmetry and operative for reflecting incident light, the curvature of said Surface being such that the intensity of the reflected light is substantially the same in all directions; a varying element for varying the character of light reflected by said reflecting element and having a second plane of symmetry paralleling said first plane, said elements being relatively movable between at least one operative position and an inoperative position in which said varying element respectively varies and does not vary the character of light reflected by said reflecting element; and moving means for effecting relative movement of said elements between said positions thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |