Circuit breaker rotary contact arm arrangement

Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices

Reexamination Certificate

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Details

C200S244000, C218S022000

Reexamination Certificate

active

06262642

ABSTRACT:

BACKGROUND OF INVENTION
This invention relates to circuit breaker, and, more particularly, to a circuit breaker rotary contact arm arrangement.
Circuit breakers having a current interrupting module within a rotary contact arm arrangement whereby the circuit breaker movable contact arms are arranged at the opposite ends of the movable contact carrier are able to interrupt circuit current at a faster rate than circuit breakers having a movable contact carrier with a contact arranged at one end. U.S. Pat. No. 5,310,971 entitled Rotary Contact System for Circuit Breakers, describes a rotary contact arm that employs rollers between the contact springs and the contact arm to provide a uniform force distribution between the fixed contacts attached to the circuit breaker line and load straps and the movable contacts arranged at the opposite ends of the movable contact arm. One problem associated with a non-uniform force distribution between the fixed and movable contacts is the possibility of excessive contact erosion on the pair of contacts at the lower force points along the fixed contact surface.
U.S. patent application Ser. No. 09/384,908 filed Aug. 27, 1999 entitled Rotary Contact Assembly For High Ampere-Rated Circuit Breakers describes connecting the circuit breaker contact springs with the movable contact arm by means of pivotally-arranged links to compensate for contact wear and erosion over long periods of extensive circuit interruption.
SUMMARY OF THE INVENTION
In an exemplary embodiment of the invention, a rotary contact arrangement for circuit breakers of the type including a pair of contact springs arranged on each side of the rotary contact arm, has the contact springs interconnected between the rotors and the contact arm via a pair of U-shaped levers. The U-shaped lever sidearms interact with the perimeter surfaces of the rotors whereas the bights of the U-shaped levers interact with the shaped surfaces of the contact arm to insure uniform spring force between the fixed and movable contacts.
Uniform contact pressure between both pairs of fixed and movable contacts in a rotary type circuit breaker is provided without having to interpose rollers between the contact springs and the movable contact arm, especially when used in multi-pole circuit breakers that require a separate movable contact arm in each of the separate poles


REFERENCES:
patent: D. 367265 (1996-02-01), Yamagata et al.
patent: 2340682 (1944-02-01), Powell
patent: 2719203 (1955-09-01), Gelzheiser et al.
patent: 2937254 (1960-05-01), Ericson
patent: 3158717 (1964-11-01), Jencks et al.
patent: 3162739 (1964-12-01), Klein et al.
patent: 3197582 (1965-07-01), Nordern
patent: 3307002 (1967-02-01), Cooper
patent: 3517356 (1970-06-01), Hanafusa
patent: 3631369 (1971-12-01), Menocal
patent: 3803455 (1974-04-01), Willard
patent: 3883781 (1975-05-01), Cotton
patent: 4129762 (1978-12-01), Bruchet
patent: 4144513 (1979-03-01), Shafer et al.
patent: 4158119 (1979-06-01), Krakik
patent: 4165453 (1979-08-01), Hennemann
patent: 4166988 (1979-09-01), Ciarcia et al.
patent: 4220934 (1980-09-01), Wafer et al.
patent: 4255732 (1981-03-01), Wafer et al.
patent: 4259651 (1981-03-01), Yamal
patent: 4263492 (1981-04-01), Maier et al.
patent: 4276527 (1981-06-01), Gerbert-Gaillard et al.
patent: 4297663 (1981-10-01), Seymour et al.
patent: 4301342 (1981-11-01), Castonguay et al.
patent: 4360852 (1982-11-01), Gilmore
patent: 4368444 (1983-01-01), Preuss et al.
patent: 4375021 (1983-02-01), Pardini et al.
patent: 4375022 (1983-02-01), Daussin et al.
patent: 4376270 (1983-03-01), Staffen
patent: 4383146 (1983-05-01), Bur
patent: 4392036 (1983-07-01), Troebel et al.
patent: 4393283 (1983-07-01), Masuda
patent: 4401872 (1983-08-01), Boichot-Castagne et al.
patent: 4409573 (1983-10-01), DiMarco et al.
patent: 4435690 (1984-03-01), Link et al.
patent: 4467297 (1984-08-01), Boichot-Castagne et al.
patent: 4468645 (1984-08-01), Gerbert-Gallard et al.
patent: 4470027 (1984-09-01), Link et al.
patent: 4479143 (1984-10-01), Wantanabe et al.
patent: 4488133 (1984-12-01), McClellan et al.
patent: 4492941 (1985-01-01), Nagel
patent: 4541032 (1985-09-01), Schwab
patent: 4546224 (1985-10-01), Mostosi
patent: 4550360 (1985-10-01), Dougherty
patent: 4562419 (1985-12-01), Preuss et al.
patent: 4589052 (1986-05-01), Dougherty
patent: 4595812 (1986-06-01), Tamaru et al.
patent: 4611187 (1986-09-01), Banfi
patent: 4612430 (1986-09-01), Sloan et al.
patent: 4616198 (1986-10-01), Pardini
patent: 4622444 (1986-11-01), Kandatsu et al.
patent: 4631625 (1986-12-01), Alexander et al.
patent: 4642431 (1987-02-01), Tedesco et al.
patent: 4644438 (1987-02-01), Puccinelli et al.
patent: 4649247 (1987-03-01), Preuss et al.
patent: 4658322 (1987-04-01), Rivera
patent: 4672501 (1987-06-01), Bilac et al.
patent: 4675481 (1987-06-01), Markowski et al.
patent: 4682264 (1987-07-01), Demeyer
patent: 4689712 (1987-08-01), Demeyer
patent: 4694373 (1987-09-01), Demeyer
patent: 4710845 (1987-12-01), Demeyer
patent: 4717985 (1988-01-01), Demeyer
patent: 4733211 (1988-03-01), Castonguay et al.
patent: 4733321 (1988-03-01), Lindeperg
patent: 4764650 (1988-08-01), Bur et al.
patent: 4768007 (1988-08-01), Mertz et al.
patent: 4780786 (1988-10-01), Weynachter et al.
patent: 4831221 (1989-05-01), Yu et al.
patent: 4870531 (1989-09-01), Danek
patent: 4883931 (1989-11-01), Batteux et al.
patent: 4884047 (1989-11-01), Baginski et al.
patent: 4884164 (1989-11-01), Dziura et al.
patent: 4900882 (1990-02-01), Bernard et al.
patent: 4910485 (1990-03-01), Bolongeat-Mobleu et al.
patent: 4914541 (1990-04-01), Tripodi et al.
patent: 4916420 (1990-04-01), Bartolo et al.
patent: 4916421 (1990-04-01), Pardini et al.
patent: 4926282 (1990-05-01), McGhie
patent: 4935590 (1990-06-01), Malkin et al.
patent: 4937706 (1990-06-01), Schueller et al.
patent: 4939492 (1990-07-01), Raso et al.
patent: 4943691 (1990-07-01), Mertz et al.
patent: 4943888 (1990-07-01), Jacob et al.
patent: 4950855 (1990-08-01), Bolonegeat-Mobleu et al.
patent: 4951019 (1990-08-01), Gula
patent: 4952897 (1990-08-01), Barnel et al.
patent: 4958135 (1990-09-01), Baginski et al.
patent: 4965543 (1990-10-01), Batteux
patent: 4983788 (1991-01-01), Pardini
patent: 5001313 (1991-03-01), Leclerq et al.
patent: 5004878 (1991-04-01), Seymour et al.
patent: 5029301 (1991-07-01), Nebon et al.
patent: 5030804 (1991-07-01), Abri
patent: 5057655 (1991-10-01), Kersusan et al.
patent: 5077627 (1991-12-01), Fraisse
patent: 5083081 (1992-01-01), Barrault et al.
patent: 5095183 (1992-03-01), Raphard et al.
patent: 5103198 (1992-04-01), Morel et al.
patent: 5115371 (1992-05-01), Tripodi
patent: 5120921 (1992-06-01), DiMarco et al.
patent: 5132865 (1992-07-01), Mertz et al.
patent: 5138121 (1992-08-01), Streich et al.
patent: 5140115 (1992-08-01), Morris
patent: 5153802 (1992-10-01), Mertz et al.
patent: 5155315 (1992-10-01), Malkin et al.
patent: 5166483 (1992-11-01), Kersusan et al.
patent: 5172087 (1992-12-01), Castonguay et al.
patent: 5178504 (1993-01-01), Falchi
patent: 5184717 (1993-02-01), Chou et al.
patent: 5187339 (1993-02-01), Lissandrin
patent: 5198956 (1993-03-01), Dvorak
patent: 5200724 (1993-04-01), Gula et al.
patent: 5210385 (1993-05-01), Morel et al.
patent: 5239150 (1993-08-01), Bolongeat-Mobleu et al.
patent: 5260533 (1993-11-01), Livesey et al.
patent: 5262744 (1993-11-01), Arnold et al.
patent: 5280144 (1994-01-01), Bolongeat-Mobleu et al.
patent: 5281776 (1994-01-01), Morel et al.
patent: 5296660 (1994-03-01), Morel et al.
patent: 5296664 (1994-03-01), Crookston et al.
patent: 5298874 (1994-03-01), Morel et al.
patent: 5300907 (1994-04-01), Nereau et al.
patent: 5310971 (1994-05-01), Vial et al.
patent: 5313180 (1994-05-01), Vial et al.
patent: 5317471 (1994-05-01), Izoard et al.
patent: 5331500 (1994-07-01), Corcoles et al.
patent: 5334808 (1994-08-01), Bur et al.
patent: 5341191 (1994-08-01), Crookston et al.
patent: 5347096 (1994-09-01), Bolongeat-Mobleu et al.
patent: 5347097 (1994-09-01), Bolongeat-Mobleu et al.
patent: 5350892 (1994-09-01), Rozier
patent: 5351024 (1994-09-01), Juds et al.
patent: 5357066 (1994-10-01),

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