Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8164018 | Circuit breaker arc chambers and methods for operating same Embodiments provide arc chambers, and methods adapted to rapidly extinguish arcs in circuit breakers. In one aspect, a circuit breaker is provided having first and second electrical contacts, wherein at least one of the contacts is movable and has a maximum contact ... | 04/24/2012 |
| 7202436 | Secondary arc chute and electrical switching apparatus incorporating same A secondary arc chute is for an electrical switching apparatus including a housing, a pair of separable contacts enclosed within the housing, and a primary arc chute disposed proximate the separable contacts in order to attract an arc generated by the separable cont... | 04/10/2007 |
| 7186941 | Arc extinguisher assembly for molded case circuit breaker An arc extinguisher assembly is provided for a mould cased circuit breaker capable of reducing time for arc extinguishing and preventing contacts from being damaged due to a back flow of an arc. To this end, the arc extinguisher assembly for a mould cased circuit br... | 03/06/2007 |
| 7094986 | ARC chute assembly The arc plates of an arc chute assembly for a circuit breaker are supported in spaced, stacked relation by a structural shell molded of a gas evolving resin. Generation of arc gases, that cool the arc thereby increasing the current interruption capability of the bre... | 08/22/2006 |
| 6917269 | Low-voltage circuit breaker with an electric arc extinction system An electric arc extinction chamber system, especially for low-voltage circuit breakers of very high nominal current intensities, wherein parallel electric arc extinction chamber inserts are provided in a housing extending over the entire width of a pole-face arc. Th... | 07/12/2005 |
| 6809282 | D.C. circuit breaker with magnets for reducing contact arcing An electromagnetic circuit breaker is provided with a pair of magnets on opposing sides of the contacts in the open position. A magnetic field generated by the magnets combines with the magnetic field generated by the electrical arc created upon opening of the conta... | 10/26/2004 |
| 6717090 | Arc quenching configuration for an electrical switching device An arc quenching configuration for an electrical switching device has an arcing chamber in which an arc is produced between a stationary contact piece and a moving contact piece during a switching operation. An arc splitter stack is provided and has a number of arc ... | 04/06/2004 |
| 6348666 | Pole for an electrical circuit breaker, equipped with an extinguishing chamber with dielectric shields An electrical circuit breaker pole comprises a stationary contact means, a movable contact means, and an arc extinguishing chamber comprising two side flanges, separators, a front opening situated near to the contact zone of the stationary contact means, ... | 02/19/2002 |
| 6262384 | Switching device having an arc extinguishing device A switching device is provided having an optimally used arcing chamber. To this end, a lower arc runner plate extends into a space located behind the arcing chamber, and an upper arc runner plate is positioned off from this space by an appropriate design ... | 07/17/2001 |
| 6248970 | ARC chute for a molded case circuit breaker A circuit breaker (10) including an electrical arc extinguishing apparatus (105). The electric arc extinguishing arc apparatus (105) includes a first sidewall (106) in a spaced relationship with the second sidewall (107) with a top arc plate (110) mounted... | 06/19/2001 |
| 6207916 | Electric arc explosion chamber system An arcing chamber system having one or more chamber bodies connected in series, wherein one or more arcing chamber modules, are arranged in each chamber body is present. A plurality of arcing chamber modules may be employed to achieve for various contact ... | 03/27/2001 |
| 5945650 | Polyphase rotary switch including arc chamber system with arc grids, line shields and baffles A multi-phased switch support base including a molded top cover and a molded bottom base each having interior and exterior walls which divide the interiors. When assembled together the base is divided into compartmentalized arc chambers which function to ... | 08/31/1999 |
| 5898152 | ARC chute assembly for circuit breaker An arc chute assembly for a circuit breaker includes a plurality of U-type grids respectively including an engagement protrusion extended from each side thereof, the engagement protrusion having a key pin opening formed therethrough, a plurality of side w... | 04/27/1999 |
| 5504292 | Arc stack for a circuit breaker An arc stack for receiving a circuit breaker blade moveable between a closed position and an open position, includes a plurality of arc plates positioned substantially parallel to one another and arranged in a plurality of adjacent groups. Each of the gro... | 04/02/1996 |
| 5498847 | Arc stack for a circuit breaker An arc stack for receiving a circuit breaker blade moveable between a closed position and an open position, includes a plurality of generally rectangular are plates having substantially similar length and width dimensions and positioned substantially para... | 03/12/1996 |
| 4877929 | Breaking device for multipole electrical circuit breaker with multiple contacts An arc extinguishing chamber with plates, for a high-rating low voltage circuit breaker, interrupts an arc generated by a multiple contact system having a set of movable main contacts and a movable arcing contact cooperating with corresponding stationary ... | 10/31/1989 |
| 4764650 | Molded case circuit breaker with removable arc chutes and disengageable transmission system between the operating mechanism and the poles A sub-assembly comprising a contact finger support cage and a connection pad of each pole is securedly united to an intermediate insulating partition of the case by a bracket and screw fixing device. The cage is pivotally mounted on a spindle positioned i... | 08/16/1988 |
| 4011425 | Arc chute extension for increased interruption rating A molded case circuit breaker having a spaced plate arc chute for each pole thereof, with each arc chute having a V-shaped mouth region at one end and having separable arcing contacts positioned at the mouth region and having a space defined opposite the ... | 03/08/1977 |
