Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-04-18
2006-04-18
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C315S120000
Reexamination Certificate
active
07030365
ABSTRACT:
A system for sensing the presence of nearby objects includes an emitter-detector assembly and retroreflector. The emitter-detector assembly has a light emission area from which light is transmitted toward the retroreflector. The retroreflector returns that light to a light detection area of the emitter-detector assembly which produces a signal indicating an unbroken light path. Objects passing near the assembly interrupt the light path thereby providing an indication of their presence. The light emission area and the light detection area are concentric to each other which enables the light detection area to have close proximity to the light emission area. That parameter optimizes response to light from the retroreflector, while minimizing response to light reflected by other objects.
REFERENCES:
patent: 3619058 (1971-11-01), Hewlett et al.
patent: 3728026 (1973-04-01), Idestrom et al.
patent: 3752581 (1973-08-01), Everest et al.
patent: 3900260 (1975-08-01), Wendt
patent: 3996476 (1976-12-01), Lazzara
patent: 4113381 (1978-09-01), Epstein
patent: 4113831 (1978-09-01), Epstein
patent: 4153366 (1979-05-01), Mamon et al.
patent: 4159873 (1979-07-01), Farnsworth
patent: 4498764 (1985-02-01), Bolkow et al.
patent: 4521107 (1985-06-01), Chaborski et al.
patent: 4605081 (1986-08-01), Helmly, Jr. et al.
patent: 4614968 (1986-09-01), Rattman et al.
patent: 4626053 (1986-12-01), Fayfield
patent: 4644341 (1987-02-01), Warner
patent: 4699508 (1987-10-01), Bolkow et al.
patent: 4790402 (1988-12-01), Field et al.
patent: 4846297 (1989-07-01), Field et al.
patent: 4851660 (1989-07-01), Juds et al.
patent: 4878407 (1989-11-01), Harrison et al.
patent: 4880966 (1989-11-01), Goodrich et al.
patent: 4931631 (1990-06-01), Jackson
patent: 4961490 (1990-10-01), Risko et al.
patent: 4996468 (1991-02-01), Field et al.
patent: 5054911 (1991-10-01), Ohishi et al.
patent: 5056437 (1991-10-01), Maddock
patent: 5198664 (1993-03-01), Fayfield
patent: 5200607 (1993-04-01), Klima
patent: 5206697 (1993-04-01), Schwartz
patent: 5247184 (1993-09-01), Kimball
patent: 5322074 (1994-06-01), Cross, Jr.
patent: 5326968 (1994-07-01), Johnson et al.
patent: 5331150 (1994-07-01), Marsh
patent: 5477869 (1995-12-01), Cross, Jr.
patent: 5496996 (1996-03-01), Barnes et al.
patent: 5500523 (1996-03-01), Hamanaka
patent: 5559496 (1996-09-01), Dubats
patent: 5563798 (1996-10-01), Berken et al.
patent: 5600906 (1997-02-01), Hamid
patent: 5642850 (1997-07-01), Sadler et al.
patent: 5663621 (1997-09-01), Popat
patent: 5684596 (1997-11-01), Eslinger et al.
patent: 5685987 (1997-11-01), Hixon, Jr. et al.
patent: 5707523 (1998-01-01), Temple
patent: 5729024 (1998-03-01), Baba et al.
patent: 5740062 (1998-04-01), Berken et al.
patent: 5749821 (1998-05-01), Simmons
patent: 5755550 (1998-05-01), Brandt et al.
patent: 5757489 (1998-05-01), Kawakami
patent: 5767971 (1998-06-01), Kawai et al.
patent: 5818062 (1998-10-01), Baba et al.
patent: 5828056 (1998-10-01), Alderman et al.
patent: 5828456 (1998-10-01), Aoki et al.
patent: 5829231 (1998-11-01), Harding et al.
patent: 5868657 (1999-02-01), Simmons
patent: 5872646 (1999-02-01), Alderman et al.
patent: 5879626 (1999-03-01), Watterson et al.
patent: 5880822 (1999-03-01), Kubo
patent: 5929436 (1999-07-01), Baba et al.
patent: 5941444 (1999-08-01), Sadler et al.
patent: 6010223 (2000-01-01), Gubela, Sr.
patent: 6018159 (2000-01-01), Alderman et al.
patent: 6036209 (2000-03-01), Tsumura et al.
patent: 6151185 (2000-11-01), Ishizuka et al.
patent: 6186388 (2001-02-01), Sadler et al.
patent: 6198540 (2001-03-01), Ueda et al.
patent: 6213680 (2001-04-01), Schaeffer et al.
patent: 6229598 (2001-05-01), Yoshida
patent: 6279881 (2001-08-01), Nishi
patent: 6344656 (2002-02-01), Hopkins et al.
patent: 6377167 (2002-04-01), Juds et al.
patent: 6403223 (2002-06-01), Albro et al.
patent: 6412535 (2002-07-01), Barolovits et al.
patent: 6433332 (2002-08-01), Chin et al.
patent: 6492775 (2002-12-01), Klotz
patent: 6560537 (2003-05-01), Matthews
patent: 2003/0106991 (2003-06-01), Klotz
Eaton Corporation
Haas George E.
Ko Tony
Luu Thanh X.
Quarles & Brady LLP
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