摘要:
A current limiting contactor characterized by stationary and movable contacts, an elongated conductor supporting the movable contact, the conductor being fixedly mounted at a position spaced from the movable contact, the conductor having a looped portion including a pair of overlapping segments for conducting current in opposite directions of each other, the movable contact engaging the stationary contact when conducting a current up to a predetermined current value, and the conductor being comprised of a flexible material and the overlapping portions being separable to move the movable contact away from the stationary contact when the current exceeds said predetermined value.
摘要:
A current limiting circuit interrupter with insulating wedge characterized by a circuit interrupter structure within an insulating housing and having a mechanism for opening and closing separable contacts, the contacts being separately mounted on contact mounting arms that extend in substantially parallel spaced locations to effect current limiting relationship between the arms to cause any arc forming between the opening contacts to blow out of the contacts in a direction away from the spaced contact arms, a dielectric plate-like shutter in the plane extending between the contacts and in the direction opposite the contact arms, the shutter being movable into a gap formed between the separating contacts when the contacts separate, moving mechanism for moving the shutter when the contacts open and reset structure for retracting the shutter when the contacts close.
摘要:
A current limiting solenoid operated circuit breaker characterized by an arc quenching chamber having spaced arc guide rails along opposite sides of the chamber, stationary and movable contacts in an arcing zone adjacent to the chamber and electrically connected to corresponding guide rails, and a conductor around the arcing zone to generate a transverse magnetic field through an arc to drive the arc from the contacts and along the guide rails to the arc quenching chamber.
摘要:
A molded case circuit breaker is provided with a pivotally mounted contact arm assembly, formed as a clinch joint. The contact arm assembly is a bifurcated assembly formed from two coextensive members fastened together at one end defining a surface for carrying a movable main contact. The other end of the members is bent outwardly defining spaced apart arm portions for receiving a pivot bracket. The pivot bracket is provided with an aperture and aligned with apertures in the spaced apart portions for receiving a pivot pin and defining a pivot axis. The pivot bracket is rigidly connected to a load conductor. The current that flows through the contact arm is transferred to bosses integrally formed adjacent the apertures in the pivot bracket. Screw adjustable spring members are provided for adjusting the friction and the electrical resistance between the contact surfaces of the contact arm assembly and the bosses.
摘要:
A circuit breaker contact operating structure characterized by a circuit breaker operating mechanism having separable contacts of which one is mounted on a contact carrying arm. The arm being mounted on a one leg of a U-shaped flexible conductor. A guide link is pivotally mounted and connected to the arm to maintain the contacts in alignment during their separation. The operating mechanism having a latch for latching the arm in the closed-contact position of the arm and having a trip device for unlatching the latch in response to an overcurrent condition. The mechanism link is so placed on the contact arm structure as to effect a blow-on force on the contact structure during the duration of high overcurrent. At a preset current level, the mechanism link is prevented from applying the balancing force to the contact structure, thus allowing the blow-off forces due to the current in the contact structure to separate the contacts rapidly, and to effect current limitation and subsequent circuit interruption.
摘要:
A tubular soft iron member is slidably positioned within a magnet-coil assembly and adapted to respond to toggle action travel between two magnetically stable states by producing rapid changes in magnetic flux. Electrical pulses developed by the coil in response to the changes in magnetic flux are useful for control and alarm purposes.
摘要:
A circuit breaker for use in remote load energy management systems and characterized by an insulating housing including opposite side walls, end walls and edge walls with a circuit breaker structure contained therein; a manual operator including a handle extending through an edge wall for actuating the structure between open and closed circuit conditions; an electromagnetic within the housing and including an armature for opening the circuit which armature is movable in an axis substantially perpendicular to the edge walls.
摘要:
A circuit breaker having an integral handle cover assembly for manual operation of the circuit breaker. The handle assembly comprises a cap segment and a base segment. The base segment removably engages with the operating mechanism of the circuit breaker with the cap segment positioned exterior to the circuit breaker cover and engaged with the base segment such that the handle assembly is attached to the cover while being movable in the opening thereof during the opening and closing of the circuit breaker allowing the cover to be removed from the circuit breaker without the detachment of the handle assembly from the cover.
摘要:
A multiphase circuit breaker structure characterized by stationary and movable contact means for each phase, a cross bar operatively connected to the movable contact means, a stop plate for stopping movement of the cross bar during opening of the contacts, and shock absorbing means on one of the stop plate and cross bar for absorbing energy released when the cross bar moves to the open position of the contacts.
摘要:
A compact electric generator that is powered by a tensioned spring and adapted to serve as an integral and permanent source of electric energy for a photographic camera or other apparatus. The generator includes a permanent magnet, a pole piece and a reciprocally-movable armature that define a magnetic circuit. The permanent magnet is also movable with respect to the pole piece and armature and is so oriented, when the generator is cocked, that the field strength of the magnetic circuit is sufficient to permit the pole piece to magnetically "capture" the armature and hold it in a predetermined position against the action of the tensioned spring. The generator is tripped by displacing the permanent magnet and thus weakening the field strength of the magnetic circuit. This permits the tensioned spring to overcome the magnetic "lock" on the armature and rapidly propel the latter away from the pole piece. The resultant sudden change in the flux density of the magnetic circuit induces a voltage pulse in an associated wire coil.