Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2011-03-08
2011-03-08
Tweel, Jr., John A (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C307S131000, C324S701000
Reexamination Certificate
active
07902992
ABSTRACT:
The sensitivity and accuracy of a status indicator for sensing a current in an electrical circuit is improved by shifting the reference level of the transformer output to maximize the input signal to a precision voltage detector and by reducing the hysteresis of the status indicator by balancing the burden of the current transformer during the positive and negative alternations of the AC signal and by driving secondary loads with a voltage to current converter.
REFERENCES:
patent: 1100171 (1914-06-01), Brown
patent: 1455263 (1923-05-01), Oberfell
patent: 1569723 (1926-01-01), Dickinson
patent: 1800474 (1931-04-01), Scherer
patent: 1830541 (1931-11-01), Harris
patent: 1871710 (1932-08-01), Lenehan
patent: 2059594 (1936-11-01), Massa, Jr.
patent: 2411405 (1946-11-01), Yuhas
patent: 2412782 (1946-12-01), Palmer
patent: 2428613 (1947-10-01), Boyajian
patent: 2428784 (1947-10-01), Cole
patent: 2512070 (1950-06-01), Nelsen et al.
patent: 2663190 (1953-12-01), Ilgenfritz
patent: 2746295 (1956-05-01), Lubkin
patent: 2802182 (1957-08-01), Godshalk et al.
patent: 2852739 (1958-09-01), Hansen
patent: 2943488 (1960-07-01), Strobel et al.
patent: 3190122 (1965-06-01), Edwards
patent: 3243674 (1966-03-01), Ebert
patent: 3287974 (1966-11-01), Ciemochowski
patent: 3374434 (1968-03-01), Perry
patent: 3493760 (1970-02-01), Hoadley
patent: 3512045 (1970-05-01), Sanger et al.
patent: 3584294 (1971-06-01), Siwko
patent: 3593078 (1971-07-01), Domshy et al.
patent: 3696288 (1972-10-01), Carman
patent: 3728705 (1973-04-01), Atkins
patent: 3769548 (1973-10-01), Pardue
patent: 3772625 (1973-11-01), Raupach
patent: 3793559 (1974-02-01), Ristuccia
patent: 3861411 (1975-01-01), Mitchell et al.
patent: 3955701 (1976-05-01), Fisch
patent: 3976924 (1976-08-01), Vanjani
patent: 4001647 (1977-01-01), Klein et al.
patent: 4001758 (1977-01-01), Esper et al.
patent: 4007401 (1977-02-01), Kimmel
patent: 4030058 (1977-06-01), Riffe et al.
patent: 4048605 (1977-09-01), McCollum
patent: 4096436 (1978-06-01), Cook et al.
patent: 4107519 (1978-08-01), Bicek
patent: D249883 (1978-10-01), Collins
patent: 4124030 (1978-11-01), Roberts
patent: 4151578 (1979-04-01), Bell
patent: 4158217 (1979-06-01), Bell
patent: 4158810 (1979-06-01), Leskovar
patent: 4177496 (1979-12-01), Bell et al.
patent: 4198595 (1980-04-01), Milkovic
patent: 4207604 (1980-06-01), Bell
patent: 4215278 (1980-07-01), Barbier et al.
patent: 4227419 (1980-10-01), Park
patent: 4241237 (1980-12-01), Paraskevakos et al.
patent: 4243982 (1981-01-01), Yarbrough
patent: 4249264 (1981-02-01), Crochet et al.
patent: 4250449 (1981-02-01), Shum
patent: 4253336 (1981-03-01), Pietzuch
patent: 4258348 (1981-03-01), Belfer et al.
patent: 4297741 (1981-10-01), Howell
patent: 4328903 (1982-05-01), Baars
patent: 4354155 (1982-10-01), Speidel et al.
patent: 4359672 (1982-11-01), Hart
patent: 4362580 (1982-12-01), Kane et al.
patent: 4363061 (1982-12-01), Vaerewyck et al.
patent: 4371814 (1983-02-01), Hannas
patent: 4373392 (1983-02-01), Nagamoto
patent: 4384289 (1983-05-01), Stillwell et al.
patent: 4386280 (1983-05-01), Ricaud et al.
patent: 4388668 (1983-06-01), Bell et al.
patent: 4393714 (1983-07-01), Schmidt
patent: 4398426 (1983-08-01), Park et al.
patent: 4408175 (1983-10-01), Nelson et al.
patent: 4413193 (1983-11-01), Crockett
patent: 4413230 (1983-11-01), Miller
patent: 4426673 (1984-01-01), Bell et al.
patent: 4432238 (1984-02-01), Tward
patent: 4464661 (1984-08-01), Redmond
patent: 4491790 (1985-01-01), Miller
patent: 4495463 (1985-01-01), Milkovic
patent: 4506199 (1985-03-01), Asche
patent: 4558310 (1985-12-01), McAllise
patent: 4558595 (1985-12-01), Kompelien
patent: 4574266 (1986-03-01), Valentine
patent: 4605883 (1986-08-01), Cockroft
patent: 4621532 (1986-11-01), Takagi et al.
patent: 4660407 (1987-04-01), Takami et al.
patent: 4709339 (1987-11-01), Fernandes
patent: 4739229 (1988-04-01), Heiler, Jr.
patent: 4746809 (1988-05-01), Coleman et al.
patent: 4754365 (1988-06-01), Kazahaya
patent: 4757416 (1988-07-01), Wilkerson
patent: 4758962 (1988-07-01), Fernandes
patent: 4783748 (1988-11-01), Swarztrauber et al.
patent: 4794327 (1988-12-01), Fernandes
patent: 4808910 (1989-02-01), Kessi
patent: D301331 (1989-05-01), Rhodin
patent: 4851803 (1989-07-01), Hahn
patent: 4855671 (1989-08-01), Fernandes
patent: 4874904 (1989-10-01), DeSanti
patent: 4885655 (1989-12-01), Springer et al.
patent: 4887018 (1989-12-01), Libert
patent: 4890318 (1989-12-01), Crane et al.
patent: 4926105 (1990-05-01), Mischenko et al.
patent: 4939451 (1990-07-01), Baran et al.
patent: 4944187 (1990-07-01), Frick et al.
patent: 4956588 (1990-09-01), Ming
patent: 4970476 (1990-11-01), Kitagawa
patent: 4972167 (1990-11-01), Fujioka
patent: 4985761 (1991-01-01), Adams
patent: 4991050 (1991-02-01), Heberlein, Jr. et al.
patent: 4992709 (1991-02-01), Griffin
patent: 4999575 (1991-03-01), Germer
patent: 5003278 (1991-03-01), May
patent: 5014908 (1991-05-01), Cox
patent: 5025195 (1991-06-01), Reeves
patent: 5039970 (1991-08-01), Cox
patent: 5051601 (1991-09-01), Atobe et al.
patent: 5066904 (1991-11-01), Bullock
patent: 5079510 (1992-01-01), Komatsu et al.
patent: D323815 (1992-02-01), Boutellier
patent: 5099193 (1992-03-01), Moseley et al.
patent: 5122735 (1992-06-01), Porter et al.
patent: 5148348 (1992-09-01), White
patent: 5196784 (1993-03-01), Estes, Jr.
patent: D335488 (1993-05-01), Suzuki et al.
patent: 5223790 (1993-06-01), Baran et al.
patent: 5267122 (1993-11-01), Glover et al.
patent: 5296819 (1994-03-01), Kuroiwa et al.
patent: 5311138 (1994-05-01), Ott et al.
patent: 5317274 (1994-05-01), Nakagawa et al.
patent: 5323256 (1994-06-01), Banks
patent: 5337206 (1994-08-01), Kadah et al.
patent: 5359273 (1994-10-01), Fluckiger
patent: D354945 (1995-01-01), Dellavecchia et al.
patent: 5385060 (1995-01-01), Wang
patent: 5391983 (1995-02-01), Lusignan et al.
patent: 5397970 (1995-03-01), Rowlette et al.
patent: 5410920 (1995-05-01), Westwick
patent: 5426360 (1995-06-01), Maraio et al.
patent: 5430438 (1995-07-01), Joos et al.
patent: 5444183 (1995-08-01), Gehrs et al.
patent: 5450765 (1995-09-01), Stover
patent: 5467012 (1995-11-01), Nystrom
patent: 5471359 (1995-11-01), Simpson et al.
patent: 5473234 (1995-12-01), Richardson
patent: 5502374 (1996-03-01), Cota
patent: 5548209 (1996-08-01), Lusignan et al.
patent: 5563506 (1996-10-01), Fielden et al.
patent: 5568059 (1996-10-01), Futsuhara et al.
patent: 5572073 (1996-11-01), Burgess et al.
patent: 5578927 (1996-11-01), Perelle
patent: 5592989 (1997-01-01), Lynn et al.
patent: 5596652 (1997-01-01), Piatek et al.
patent: 5604315 (1997-02-01), Briefer et al.
patent: 5612499 (1997-03-01), Andrew et al.
patent: 5677476 (1997-10-01), McCarthy et al.
patent: 5705989 (1998-01-01), Cota et al.
patent: 5712558 (1998-01-01), Saint-Cyr et al.
patent: 5753983 (1998-05-01), Dickie et al.
patent: 5784249 (1998-07-01), Pouliot
patent: 5808846 (1998-09-01), Holce et al.
patent: 5844138 (1998-12-01), Cota
patent: 5861683 (1999-01-01), Engel et al.
patent: 5880677 (1999-03-01), Lestician
patent: 5880918 (1999-03-01), Horbelt et al.
patent: 5905439 (1999-05-01), McIntyre
patent: 5909087 (1999-06-01), Bryde et al.
patent: 5920190 (1999-07-01), Peterson et al.
patent: 5920191 (1999-07-01), Maniero et al.
patent: 5922939 (1999-07-01), Cota
patent: 5995911 (1999-11-01), Hart
patent: 6005760 (1999-12-01), Holce et al.
patent: D419964 (2000-02-01), Holce et al.
patent: 6020702 (2000-02-01), Farr
patent: 6029524 (2000-02-01), Klauder et al.
patent: 6044430 (2000-03-01), MacDonald
patent: 6046550 (2000-04-01), Ference et al.
patent: 6064192 (2000-05-01), Redmyer
patent: 6091023 (2000-07-01), O'Donnell
patent: 6122972 (2000-09-01), Crider
patent: 6124791 (2000-09-01), Wolf
patent: D431534 (2000-10-01), Holce et al.
patent: 6133709 (2000-10-01), Puchianu
patent: 6133723 (2000-10-01), Feight
patent: 6137418 (2000-10-01), Zuercher et al.
patent: 6146109 (2000-11-01), Davis et al.
patent: 6219216 (2001-04-01), Holce et al.
patent: 6236949 (2001-05-01), Hart
patent: 6269317 (2001-07-01), Schachner et al.
patent: 6308140 (2001-10-01), Dowling et al.
patent: 6330516 (2001-12-01)
Chernoff Vilhauer & McClung & Stenzel
Tweel, Jr. John A
Veris Industries, LLC
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