Abstract: An aqueous polymer composition including a plurality of comb copolymer particles is disclosed. The comb copolymer particles contain comb copolymer having a polymer backbone with at least one attached graft segment. The polymer backbone and the at least one graft segment have select compositional ranges and select glass transition temperature ranges. Further, the comb copolymer contains as a polymerized unit at least one select monomer such as, aldehyde reactive group-containing monomer or certain styrenic monomers. The aqueous polymer composition of the present invention is useful for preparing coatings having one or more improved properties such as dirt pickup resistance, gloss, gloss retention, alkyd adhesion, and tint retention. A method for forming a coated substrate from the aqueous polymer composition of this invention is also provided.

Abstract: 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 contacts during an overcurrent condition sensed by the breaker. The combined magnetic fields deflect the arc current, shifting the arc current away from the contact points and lengthening the path of the arc, thereby increasing the voltage rating of the breaker, by decreasing the intensity of an associated arc current.

Abstract: An electromagnetic circuit breaker assembly, comprising at least one circuit breaker, is provided with a reverse polarity circuit that reduces the voltage presented to the terminals of the circuit breaker to which it is electrically connected when the terminals are further connected to a source of voltage in reverse polarity. The circuit breaker assembly is tripped due to the reverse polarity set-up, and remains tripped until the polarity is corrected. The electromagnetic coil is continuous provided with sufficient voltage so that the breaker may not be manually reset until the polarity is corrected. Preferably, the breaker is mechanically connected with another circuit breaker to create an assembly that will protect circuitry and devices against both a reverse polarity condition and an overload condition under normal operation. To this end, the reverse polarity circuit does not affect operation of the circuit breaker assembly if the polarity is in accordance with the normal set-up.

Abstract: 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 contacts during an overcurrent condition sensed by the breaker. The combined magnetic fields deflect the arc current, shifting the arc current away from the contact points and lengthening the path of the arc, thereby increasing the voltage rating of the breaker, by decreasing the intensity of an associated arc current.

Abstract: An aqueous coating composition containing comb copolymer particles is disclosed. The comb copolymer has a polymer backbone with at least one attached graft segment. Disclosed is a select comb copolymer having select values for the weight % ranges and glass transition temperature ranges of the backbone and the attached graft segment. An aqueous coating composition containing particles of this select comb copolymer is useful for preparing semi-gloss dried coatings with acceptable scrub resistance. A method of forming a coating from the aqueous coating composition is also disclosed.

Abstract: An auxiliary switch for a circuit breaker of the split case type. The switch is capable of switching the rated interrupt current capacity of the breaker and is fitted in to the circuit breaker case so that the overall width is substantially equal to or less than the overall width of the circuit breaker. Several embodiments of the auxiliary switch disclose various features which contribute to increasing the interrupt current rating and/or down sizing the width of the auxiliary switch.

Abstract: A circuit breaker bracket assembly has two generally U-shaped metal clips, each metal clip having a rearwardly projecting resilient wing formed therein with two forwardly projecting arms extending therefrom, each arm having an aperture which engages a nodule of a recess on a basal portion of a molded plastic cover plate. The molded plastic cover plate has a top face which has flanges preventing the cover plate from sliding through a panel opening. The basal portion has two mounting plugs formed on the back thereof which engage openings in each circuit breaker half case part and upon assembly of the circuit breaker holds the circuit breaker bracket assembly to the circuit breaker case.

Abstract: An electrical connection strip used for high density wiring in telecommunication systems includes an elongated block, a first and second row of connector elements and a conductor guide pivotally mounted to a bottom surface of the block. The connector elements are mounted within the block so that end portions of the first row of connector elements protrude through a top surface of the block and end portions of the second row of connector elements protrude through a bottom surface of the block. The conductor guide pivots to bend conductor wires connected to the second row of connector elements at the bottom surface of the block from a first position, in which the conductor wires are substantially parallel to the bottom surface, to a second position, in which the conductor wires are substantially perpendicular to the bottom surface.

Abstract: A low profile mounting bracket carries coupling connector blocks that mate with load and line terminals of a molded split case circuit breaker housing. The housing defines a well for receiving an alarm or auxiliary switch, and the switch is received in a central opening in the bracket with the switch terminals in turn received in a connector that fits into the same central opening. Finally, a PC board is used to electrically connect each switch to external circuitry that may generate alarms or otherwise affect the circuit breaker's operation.

Abstract: A multi-pole circuit breaker assembly for interrupting AC power to a load upon the detection of an earth leakage fault or an overcurrent condition includes a pair of circuit breaker units mounted adjacent to an earth leakage module. The earth leakage module includes an electronic circuit that senses a current imbalance between the power line lead and the neutral line lead using a differential transformer. In response to a current imbalance greater than a predetermined value, the electronic circuit periodically energizes a switching circuit that provides power across a solenoid. The solenoid, when actuated, engages a common trip mechanism to open concurrently the contacts of the circuit breakers units. The common trip mechanism includes an elongated bar that extends through the casing of the earth leakage module and the circuit breaker units. The elongated bar engages a U-shaped trip member pivotally disposed in each circuit breaker.

Abstract: An insulation displacement contact for a two wire termination connection strip includes first and second generally planar leaf elements, each having longitudinal centerlines lying in a common longitudinal plane. The longitudinal plane is perpendicular to both of the leaf elements. The first leaf element is formed with a first leaf longitudinal slot defined by a first leaf relieved edge located on a first side of the longitudinal plane, and a first leaf opposed cutting edge which is spaced from the first leaf relieved edge in a direction towards the first leaf longitudinal centerline. The second leaf element is formed with a second leaf longitudinal slot defined by a second leaf relieved edge and a second leaf opposed cutting edge, with the second leaf relieved edge located on the second side of the longitudinal plane and the second leaf opposed cutting edge being spaced from the second leaf relieved edge in a direction towards the first leaf longitudinal centerline.

Abstract: An electrical connection strip with a releasable mounting for attaching to mounting brackets of different configurations. The electrical connection strip includes an elongated block of electrically non-conductive material and a first mounting assembly. The mounting assembly comprises two longitudinal members that extend from an end of the block with a cross member running between them. Attached to the cross member is a vertical locking member which extends above and below the longitudinal members. The vertical locking member includes a locking formation located above the longitudinal members and a boss located below the longitudinal members. The locking formation and boss are configured to cooperatively engage a locking recess in a tabbed mounting bracket and tabless mounting bracket respectively.

Abstract: An electromagnetic circuit breaker is provided with a copper plated arc horn on the top side of the movable contact arm opposite the movable contact. The horn extends beyond the movable contact and has an upturned sweep so as to enhance migration of the electrical arc created upon opening of the contacts during a short circuit condition sensed by the breaker. An arc shoe is provided in conjunction with the fixed contact of the breaker as well and cooperates with the arc horn for the same purpose.

Abstract: A method is disclosed for improving the UV radiation absorption of a composition containing a UV radiation absorbing agent by adding from about 0.1 weight percent to about 50 weight percent of latex particles, based on total weight nonvolatiles. The latex particles contain a void and have a particle size of from about 100 nm to about 380 nm.

Abstract: A split case magnetic circuit breaker has a bracket secured to the front of the breaker housing similar to that used to provide a rocker for operating the breaker manually and for resetting the breaker when tripped. The bracket is formed with a small access window so that the rocker can be reset, but cannot be manually switched off.

Abstract: A bracket assembly has rearwardly projecting metal wings mounted in a plastic cover plate. The circuit breaker is normally rear mounted in a panel. The cover plate is secured to the breaker with fasteners that secure the metal wings to the breaker housing. The metal wings have legs slidably received in the plastic cover plate providing a convenient subassembly for mounting the breaker from the front of a panel.

Abstract: An improved fiber optic connector of the type in which a fiber supporting ferrule is slidably and resiliently biased independently of the surrounding load-bearing parts of the connectors so that forces applied to the fiber optic cable jacket are not transmitted to the ferrule and supported fiber to interrupt communications then in progress. The connector is substantially fully assembled prior to interconnection with the cable, and requires the introduction of an epoxy or other suitable adhesive to secure the fiber within the ferrule which is provided by a syringe. The needle of the syringe is inserted into a positioning tube which confines the adhesive to the needed area, and prevents wicking of the adhesive to surrounding areas where it might interfere with the sliding action of the ferrule. It also wipes the needle of adhesive as it is withdrawn.

Abstract: A connector block (20) which contains a plurality of electrical contacts (38) is mounted on mounting tabs (32) of a mounting bracket (22) and is releasably locked in place by means of projections (56) on release tabs (52) at the ends of the block. The release tabs are resiliently bendable away from the end wall to pull the projection (56) out from locking holes (34) in the mounting tabs (32).

Abstract: A grounding arrangement for connector strips which are mounted across the edges of parallel rails. A ground element is connected to the ground system inside the connector strip and extends though the back of the strip to a connector clip. The connector clip is engaged with a flange which extends out from one of the rails.

Abstract: An electromagnetic circuit breaker has a housing that includes a separately defined arc chamber in which the moving contact travels as the breaker is tripped, and the chamber has a divergent shape to facilitate exhausting the hot gases from the arc chamber through a metal screen and through vent openings in the end wall of the breaker housing. The housing is made in two half sections that are held together by rivets and the location of one of these rivets is isolated from the fixed contact at the lower end of the arc chamber by the unique arc chamber configuration. The lower wall of the circuit breaker housing is adapted to receive either a molded switch subassembly or to receive a terminal strip that is held in place by the primary terminals of the breaker and is adapted also to support auxiliary terminals that operate a shunt coil. The shunt coil itself is fitted on a bobbin that is selectively mounted on the bobbin that contains the primary electromagnetic coil for the breaker.