Abstract: A controllable electronic switch for, e.g., controlling power distribution comprises a bimetal member anchored at one end and in controllable contact with an electrical conductor at the other end. An incoming power wire is connected to the bimetal member near the contact point with the electrical conductor. A heating element, such as a coil, is coupled to the bimetal member, and is controlled by a switch control signal. When the switch control signal is not asserted, the heating element is inactive, and power is delivered through the incoming power wire across the end of the bimetal member to the electrical conductor, from which it can be further distributed to the load. When the switch control signal is asserted, the heating element heats up causing the bimetal to bend until the contact with the electrical conductor is broken. The electrical path from the incoming power wire to the electrical conductor (and hence, to the load) is then broken.

Abstract: A ring tongue lug retainer in a circuit breaker with the circuit breaker having a line bus conductor and a load bus conductor, wherein electrical conductors are connected to the line and load bus conductors. The ring tongue lug retainer comprises a lug body having a throughbore defining at least two interior walls and a threaded screw hole aligned perpendicular to and in communication with the throughbore. A thread portion may be provided in each interior wall of the lug body engages the binding screw configured to threadingly engage the screw hole and the lug body. The binding screw has a ring tongue protrusion configured to engage a ring tongue terminal of the electrical conductors.

Abstract: The electrical motor protector includes a housing being constructed of an electrical conductive material and having a first electrical contact disposed therein. Within the housing, a movable cantilever assembly is disposed and carries a second electrical contact thereon. Upon malfunction or overheating of the motor, the motor protector will break electrical connection between the first and second contacts to thereby interrupt electrical current to the motor, to render the motor inoperative.The cantilever assembly will be responsive to temperature wherein overheating of the motor will act to break the electrical connection between the first and second contacts, after which the motor will have a chance to cool before electrical connection is remade. The cantilever assembly includes first and second cantilevers which act in conjunction with one another to increase the cycle time of the device as well as providing a variety of other benefits and advantages.

Abstract: A self-contained switch unit for controlling a remote illuminating lamp has, in a common housing, a main ON/OFF switch, and has an emergency signal ON/OFF switch in a common housing, and has a visible pilot lamp. The main ON/OFF switch controls the ON or OFF mode of the illuminating lamp. The emergency signal ON/OFF switch functions, when the main ON/OFF switch is in the ON mode, to cause the controlled illuminating lamp to flash as a signal. When the controlled lamp is lighted, the pilot lamp is dark. When the controlled lamp is dark, the pilot lamp is lighted. When the controlled lamp is in the flashing mode, the pilot lamp also is in a flashing mode.

Abstract: A device for shifting a contact arrangement in a thermally operating protective relay having a make contact, a break contact, as well as a double-throw contact, provides for shifting the arrangement from self-locking to automatic resetting by shifting the make contact by means of a piston which can be locked. The self-locking condition provided can be cancelled by arranging the make contact for motion, in the closing direction, by the piston which is supported so as to be freely movable. The plunger has a resilient hook which can snap into undercuts in the housing of the relay which establish the end positions of the plunger. The undercuts are arranged in steps so that two different end positions for the plunger are obtained when the plunger is rotated approximately 90.degree.. One end position corresponds to the automatic resetting of the contact arrangement. The other end position makes it possible to move the plunger to cancel the self-locking condition.

Abstract: The present invention relates to an improvement in bimetallic thermostatic switches having several temperatures of response.

Abstract: A bimetallic thermo-release, especially for protective motor switches, comprising at least one bimetallic release element connected with connections for the connection of electrical lines or conductors. The bimetallic thermo-release having a bimetallic compensation element for temperature compensation and a release or trigger element which can be activated as a function of the bending or deflection of the bimetallic release element and the bimetallic compensation element. A heat-conducting connection is provided between the bimetallic compensation element and at least one connection at which there is connected one of the electrical lines.

Abstract: A current sensing, self-heating device for protecting equipment against abnormal current levels which is automatically resettable under mild overcurrent conditions and nonresettable under severe overcurrent conditions. The device comprises a thermostat metal assembly with a temperature compensating portion and an actuating portion which is placed adjacent a nonresettable two-position snap-acting blade electrically connected to ground. During normal operation current flows from the line source through the actuating portion of the thermostat metal assembly to the equipment. However, if an overcurrent condition occurs the heat generated in the actuating portion of the assembly will bend the assembly and cause it to make contact with the blade shorting the current from the line source to ground.