US3853088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for supporting a symbol in an illuminated instrument
Assignee: Bendix Corp
•
Filing: 1972-06-14
•
Granted: 1974-12-10
•
Expires: 1992-06-14
Abstract
Abstract An arrangement including an optical wedge for transmitting light from a light source to illuminate an instrument and a display symbol which is supported by a light pipe mounted to the optical wedge to eliminate supporting members which detract from the display.
Inventors
- 👤 A Marko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:18
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0033; G02B6/0035; G02B6/0045; G02B6/0046; G02B6/0081; G02B6/0086; G02B6/0088; G09; G09F; G09F13/00; G09F13/18; G09F2013/1804; G09F2013/1827
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
For use with an instrument of the type having: an elongated case with a viewing end; a bezel mounted to the viewing end of the case; a vertically disposed viewing window supported within the bezel for closing the viewing end; and indicating means supported within the case for displacement aboUt an axis in response to a condition; illuminating means comprising: a light source supported within the bezel and at the top thereof; a vertically disposed light transmitting member supported within the bezel in back of the viewing window and adjacent the light source, and having a front face adjacent said window and a rear face adjacent the indicator, said member transmitting light from the light source to the indicator means to illuminate said indicator means; and a horizontally disposed light transmitting member supported on the rear face of the vertically disposed light transmitting member and supporting a marker between said face and the indicator means and transmitting nearby light transmitted by the vertically disposed member so as to be invisible when viewing the indicator and symbol through the viewing window.
Claim 2
Dependent Claim
180 words
For use with an instrument of the type having: an elongated case with a viewing end; a bezel mounted to the viewing end of the case; a vertically disposed viewing window supported within the bezel for closing the viewing end; and indicating means supported within the case for displacement aboUt an axis in response to a condition; illuminating means comprising: a light source supported within the bezel and at the top thereof; a vertically disposed light transmitting member supported within the bezel in back of the viewing window and adjacent the light source, and having a front face adjacent said window and a rear face adjacent the indicator, said member transmitting light from the light source to the indicator means to illuminate said indicator means; and a horizontally disposed light transmitting member supported on the rear face of the vertically disposed light transmitting member and supporting a marker between said face and the indicator means and transmitting nearby light transmitted by the vertically disposed member so as to be invisible when viewing the indicator and symbol through the viewing window.
Claim 3
Dependent Claim
43 words
An instrument as described by claim 1, wherein: the vertically disposed light transmitting member is an optical wedge having its large end near the top of the instrument and adjacent the light source and its small end near the bottom of the instrument.
Claim 4
Dependent Claim
61 words
An instrument as described by claim 2, wherein: the horizontally disposed light transmitting member is a light pipe having a base portion and a stem portion; the base portion is supported on the rear face of the wedge so that the second member is in a plane normal to that of the first member; and the stem portion supports the marker.
Claim 5
Dependent Claim
25 words
An instrument as described by claim 2, wherein: the horizontally disposed light transmitting member is disposed intermediate the large and small ends of the wedge.
Claim 6
Dependent Claim
23 words
An instrument as described by claim 2, wherein: the base portion of the light pipe is conical and the stem portion is cylindrical.
References Cited (Backward Citations)
US2912766A
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US2404603A
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US2761056A
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US3040168A
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US3263646A
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US3561145A
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |