Patent US3876877A successfully refreshed from Google Patents.
US3876877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjusting device
Assignee: US Philips Corp
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Filing: 1973-08-15
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Granted: 1975-04-08
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Expires: 1993-08-15
Abstract
Abstract The invention relates to a device for the relative adjustment of an envelope and a cap of a filament lamp by means of an optical system with which a reproduction of the filament of the lamp is projected on photoelectric cells. According to the invention the optical system comprises a number of bundles of light conductors which with their one end communicate with the photoelectric cells and with their other end debouch into a screen on which the filament is reproduced.
Inventors
- 👤 Petrus Johannes Wi Meulensteen
- 👤 Henricus Theophile Pet Lakeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:12
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/16; H01K3/18; G; G01; G01B; G01B11/00; G01B11/26; G01B11/27; G01B11/272
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
164 words
A device for the relative adjustment of envelope and cap of filament lamps before said cap and envelope are secured together, said device comprising at least one optical system by means of which the filament arranged inside the envelope is reproduced on a number of photoelectric cells are connected electrically to a control mechanism by means of which holders for cap and envelope present in the device are movable, wherein a number of bundles of elongated light conductors each of which communicate with at one end with a photoelectric cell, the oppositely located ends of the conductors debouching beside each other into a screen on which the filament is reproduced, each conductor at the area where it debouches into the screen has an elongated strip-shaped crosssection, the direction of elongation of each strip extending approximately parallel to the line which joins the centers of the envelope and the cap, the width of each strip is no greater than the diameter of the associated filament.
Claim 2
Independent Claim
164 words
A device for the relative adjustment of envelope and cap of filament lamps before said cap and envelope are secured together, said device comprising at least one optical system by means of which the filament arranged inside the envelope is reproduced on a number of photoelectric cells are connected electrically to a control mechanism by means of which holders for cap and envelope present in the device are movable, wherein a number of bundles of elongated light conductors each of which communicate with at one end with a photoelectric cell, the oppositely located ends of the conductors debouching beside each other into a screen on which the filament is reproduced, each conductor at the area where it debouches into the screen has an elongated strip-shaped crosssection, the direction of elongation of each strip extending approximately parallel to the line which joins the centers of the envelope and the cap, the width of each strip is no greater than the diameter of the associated filament.
Claim 3
Dependent Claim
39 words
A device as in claim 1 further including a second array comprising a separate optical system, number of photoelectric cells, and elongated light conductors disposed in the same relation as the first array and at generally right angles thereto.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |