Abstract:
An auxiliary contact interlock for use with an electromagnetic contactor having an operating arm, the interlock being characterized by stationary and movable contacts within a housing. The movable contacts of which are mounted on a movable contact carrier, each movable contact comprising a contact button and an adjacent flexible contact biased toward the corresponding stationary contact and engaging the same before or after the contact buttons when the movable contact carrier is moved in close proximity to or from the closed position with the stationary contact.
Abstract:
A switch device characterized by an overcenter toggle structure mounted on an electrically insulating housing, in which housing separable contacts are mounted for movement between open and closed circuit positions, and a connecting member between the toggle structure and the movable contact which connecting member extends through an opening in the housing and is movable therein rectilinearly between the open and closed positions to the stationary contact.
Abstract:
The auxiliary contact interlock for use with an electromagnetic contactor having a crossbar which in the open position of the contactor is subject to unlimited vertical bouncing incurred by ambient vibration, characterized by stationary and movable contacts within a housing, a movable contact carrier supported on a rod mounted within the housing for longitudinal movement between open and closed contact positions, the rod being biased in one of the open and closed positions by a kickout spring, the end of the rod external of the housing being depressed against the kickout spring to said one of the open and closed positions when the crossbar is in the open contact position of the electromagnetic contactor, a loading spring mounted on the rod and adjacent to the contact carrier for holding the rod in said one position and a shock spring having a greater spring constant than the loading spring on the rod and end-to-end abutment with the loading spring for maintaining the contact in said one position so long as the rod is deflected against the kickout spring by the crossbar.
Abstract:
A motor circuit interrupter characterized by a manually operated fast-acting switch and a bi-metallic over-load relay for trip opening of the switch contacts in response to current overloads. The switch comprises means for moving electric contacts between open and closed positions which means includes a releasable arm which is movable between latched and unlatched positions. When in the ''''unlatched'''' condition, the contacts are open and the operating means cannot be operated to effect a re-closing of the contacts. The switch further comprises a pivoted latch lever operatively connected to the releasable arm to retain the arm in the latched condition, or for effecting unlatching of the arm, a latch retainer lever to retain the latch lever in the latch position said retainer lever is operatively connected to the trip plate of the overload relay to effect unlatching of the latch lever and releasable arm in response to an overload current. The retainer lever is spring-biased to the latch position with the latch lever and the retainer lever comprising an extension engageable with the latch lever when the latter is in the unlatched position to maintain the latch lever in a relatching position.
Abstract:
A switch device characterized by an electrically insulating base housing, a detachable insulating cover mounted on the base housing and an over-center toggle mechanism mounted on the cover external to the housing for opening and closing separable contacts in the housing which contacts comprise a plurality of stationary contact structures that are located and maintained in place by interfitting portions of the housing and cover, the stationary contact structures being movable into operating position within the housing by surface guide means integral with the housing wall; and means for moving movable contacts comprising a crossbar and connecting element which are detachable interlocked. The invention also includes means for actuating an auxiliary switch.
Abstract:
A circuit interrupter characterized by a manually operated fast acting switch and an overload relay for tripping the switch in response to current overload as well as reset means therefor. The switch comprises a pair of pushbuttons for manually opening and closing the switch which pushbuttons are effective to move an operating lever for actuating an overcenter toggle mechanism. The reset button is provided in conjunction with one of the pushbuttons inoperable to provide visual indication of the ''''tripped,'''' or ''''open'''' positions.
Abstract:
An overload relay with a thermal tripping mechanism for releasing the separable contacts of an associated circuit interrupter in response to overload currents. The tripping mechanism comprising a latch plate and a latch lever for moving the latch plate to the unlatched position. The latch lever being biased to the latched position and being movable by one or more bimetals in the relay to the unlatched position upon the occurrence of an overload current. The latch lever being pivotally mounted on one end of an adjustment rod, the other end of which is provided with adjusting means for longitudinally moving the rod to effect a change in the spacing between the pivot point and the latch plate on one end as well as the pivot point and the point of contact of the latch lever with the bimetal.