Radiant energy – Photocells; circuits and apparatus – Housings
Reexamination Certificate
2007-06-19
2007-06-19
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Housings
C250S201100, C349S014000, C351S044000
Reexamination Certificate
active
11089930
ABSTRACT:
An auto darkening eye protection device comprising a shutter assembly adjustable between a clear state and a dark state and a control circuit. The control circuit is provided with a microcontroller, a delivery circuit, a sensing circuit and a weld detect circuit. The microcontroller is switchable between a sleep mode and a wake-up mode. The delivery circuit outputs a dark state drive signal to the shutter assembly to switch the shutter assembly from the clear state to the dark state upon enablement of the delivery circuit. The sensing circuit senses the occurrence of a welding arc and provides an output indicative of the occurrence of the welding arc. The weld detect circuit receives the output of the sensing circuit. The weld detect circuit enables a dark state drive signal to be delivered to the shutter assembly by the delivery circuit, and a signal to be delivered to the microcontroller to switch the microcontroller from the sleep mode to the wake-up mode whereby the shutter assembly is switched to the dark state without the aid of the microcontroller. The microcontroller can compensate for a startup of the microcontroller which was not caused by user power-up by bypassing at least one of a plurality of initialization and calibration routines for the auto darkening eye protection device. The microcontroller also includes a protective casing disposed generally thereabout to substantially prevent electromagnetic fields from interfering with the operation of the microcontroller.
REFERENCES:
patent: 2423320 (1947-07-01), Hurley
patent: 2548230 (1951-04-01), Molyneux
patent: 2761046 (1956-08-01), Herrick et al.
patent: 3137784 (1964-06-01), Kasemann
patent: 3159844 (1964-12-01), Haboush
patent: 3245315 (1966-04-01), Marks et al.
patent: 3575491 (1971-04-01), Heilmeier
patent: 3731986 (1973-05-01), Fergason
patent: 3873804 (1975-03-01), Gordon
patent: 3881808 (1975-05-01), Gurtler et al.
patent: 3881809 (1975-05-01), Fergason et al.
patent: 3890628 (1975-06-01), Gurtler
patent: 3918796 (1975-11-01), Fergason
patent: 3967881 (1976-07-01), Moriyama et al.
patent: 4039803 (1977-08-01), Harsch
patent: 4071912 (1978-02-01), Budmiger
patent: RE29684 (1978-06-01), Gordon
patent: 4155122 (1979-05-01), Budmiger
patent: 4237557 (1980-12-01), Gordon
patent: 4240709 (1980-12-01), Hornell
patent: 4279474 (1981-07-01), Belgorod
patent: 4328490 (1982-05-01), Usuba et al.
patent: 4385806 (1983-05-01), Fergason
patent: 4435047 (1984-03-01), Fergason
patent: 4436376 (1984-03-01), Fergason
patent: 4540243 (1985-09-01), Fergason
patent: 4556289 (1985-12-01), Fergason
patent: 4560239 (1985-12-01), Katz
patent: 4582396 (1986-04-01), Bos et al.
patent: 4664479 (1987-05-01), Hiroshi
patent: RE32521 (1987-10-01), Fergason
patent: 4710694 (1987-12-01), Sitphin et al.
patent: 4728173 (1988-03-01), Toth
patent: 4759608 (1988-07-01), Yang
patent: 4813766 (1989-03-01), Keene et al.
patent: 4821292 (1989-04-01), Childress
patent: 4863244 (1989-09-01), Fuerthbauer et al.
patent: 4877310 (1989-10-01), Seachman et al.
patent: 4901074 (1990-02-01), Sinn et al.
patent: 4928181 (1990-05-01), Harward
patent: 5015086 (1991-05-01), Okaue et al.
patent: 5074647 (1991-12-01), Fergason et al.
patent: 5113270 (1992-05-01), Fergason
patent: 5184156 (1993-02-01), Black et al.
patent: 5208688 (1993-05-01), Fergason et al.
patent: 5248880 (1993-09-01), Fergason
patent: 5252817 (1993-10-01), Fergason et al.
patent: 5347383 (1994-09-01), Fergason
patent: 5377032 (1994-12-01), Fergason et al.
patent: 5420502 (1995-05-01), Schweitzer, Jr.
patent: 5519522 (1996-05-01), Fergason
patent: 5671035 (1997-09-01), Barnes
patent: 5751258 (1998-05-01), Fergason et al.
patent: 6067129 (2000-05-01), Fergason
patent: 6070264 (2000-06-01), Hamilton et al.
patent: 6796652 (2004-09-01), Sonderegger
patent: 6815652 (2004-11-01), Hamilton
patent: 2315308 (1973-10-01), None
patent: 0157744 (1985-09-01), None
patent: 0335056 (1989-04-01), None
patent: 0349665 (1990-10-01), None
patent: 2530-039 (1984-01-01), None
patent: 325586 (1930-02-01), None
patent: 55-92276 (1980-07-01), None
patent: 59-111102 (1984-06-01), None
patent: 73127334 (1977-07-01), None
patent: 7608690-9 (1979-02-01), None
patent: WO 90/14809 (1990-12-01), None
Hamilton Thomas J.
Scott Barry D.
LandOfFree
Microprocessor based automatically dimmable eye protection... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microprocessor based automatically dimmable eye protection..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microprocessor based automatically dimmable eye protection... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3864774