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| Number | Title | Issue Date |
| 6081183 | Resistor adapted for use in forced ventilation dynamic braking applications A continuous ribbon resistor element having a plurality of conjunctive lengths alternately connected by reflexes is supported in a frame comprised of silicon bonded laminated mica. The ribbon elements are formed with a single, flat convolution center offs... | 06/27/2000 |
| 5600107 | Electric switch with dynamic brake contact shared for making and breaking a power circuit A double pole single throw electric switch has normally closed contacts of one pole connected in a dynamic braking circuit with a motor load and normally open contacts connecting the motor to a source of power. A partial movable contact conductively conne... | 02/04/1997 |
| 5517164 | Molded case circuit breaker having movable contact finger releasably locked to an operating mechanism A subframe is coaxially pivotally mounted with a movable frame of the operating mechanism of a molded case circuit breaker and is locked to the frame by a bell crank pawl which is pivotally mounted on the subframe. A leaf spring assembly rigidly attached ... | 05/14/1996 |
| 5418511 | D.C. electromagnetic contactor Molded insulating shell halves are secured together around a blowout coil, stationary and movable contacts to pivotally trap an armature assembly therebetween. Windows are provided in the shell halves to ventilate the electromagnet coil during operation. ... | 05/23/1995 |
| 5406449 | Pullout type electric disconnect switch A rigid insulating shield has tabs at a lower end inserted in slots in a case and a press-in fastener at an upper end inserted within a hole in a switch base assembly for securing said shield within the case. A handle pullout has a large flange extending ... | 04/11/1995 |
| 5393942 | Panelboard having panel-mounted interlock for two main circuit breakers An interlock between two main circuit breakers comprises a bracket mounted to the interior panel transversely of the panel and a sliding interlock member mounted on a forward portion of the bracket, which portion fits within the unmodified opening of a pa... | 02/28/1995 |
| 5319169 | Molded case circuit breaker having rectangular knee pin non-rotatably keyed to toggle linkage A molded case circuit breaker having an operating mechanism including a collapsible toggle linkage, an operating handle and a movable frame. The collapsible toggle linkage includes a rectangular cross section knee pin non-rotatably held within an open rec... | 06/07/1994 |
| 5313033 | Molded case circuit breaker having changing pivot locations for the operating handle A molded case circuit breaker having an operating mechanism including a collapsible toggle linkage, an operating handle and a movable frame. The collapsible toggle linkage includes a rectangular cross section knee pin non-rotatably held within an open rec... | 05/17/1994 |
| 5304753 | Electric switch with welded contact sensor lockout A plunger operated switch has a pair of movable contacts on a movable contact carrier bridged by a secondary contact supported on a pushbutton operator member which is biased apart from the contact carrier. Depression of the pushbutton operator for the pl... | 04/19/1994 |
| 5302788 | Molded case circuit breaker having trapezoidally shaped shaft Molded case circuit breaker having collapsible toggle linkage with rectangular cross section knee pin non-rotatably held within open rectangular slots in upper link, bifurcated movable contact fingers loosely guided for pivotal movement about fixed pin to... | 04/12/1994 |
| 5290979 | Handle block for electrical switching device A molded generally planar U-shaped plastic member has a pair of lateral projections on one leg and a single lateral projection at a distal end of the other leg, which projections are received in recesses in mutually facing surfaces of a raised escutcheon ... | 03/01/1994 |
| 5280132 | Plastic enclosure box for electrical apparatus A plastic load center box economically provided by duplicate molded end sections joined by an intermediate section of uniform cross-section which is readily provided in selected lengths in either molded or extruded form. End walls receive metal inserts el... | 01/18/1994 |
| 5278531 | Molded case circuit breaker having housing elements Molded case circuit breaker having collapsible toggle linkage with rectangular cross section knee pin non-rotatably held within open rectangular slots in upper link, bifurcated movable contact fingers loosely guided for pivotal movement about fixed pin to... | 01/11/1994 |
| 5266760 | Molded case circuit breaker Molded case circuit breaker having collapsible toggle linkage with rectangular cross section knee pin non-rotatably held within open rectangular slots in upper link, bifurcated movable contact fingers loosely guided for pivotal movement about fixed pin to... | 11/30/1993 |
| 5264673 | Circuit interrupter with center trip position and alarm A circuit interrupter manually opens and closes its contacts by use of a manually rotatable handle which acts through a collapsible linkage rotatably connected to a crank extension of the handle and rotatably connected to a rotatably movable contact suppo... | 11/23/1993 |
| 5258733 | Molded case circuit breaker having improved trip unit Molded case circuit breaker having collapsible toggle linkage with rectangular cross section knee pin non-rotatably held within open rectangular slots in upper link, bifurcated movable contact fingers loosely guided for pivotal movement about fixed pin to... | 11/02/1993 |
| 5258729 | Case circuit breaker having improved attachment means for accessory devices and accessory devices therefor Molded case circuit breaker having collapsible toggle linkage with rectangular cross section knee pin non-rotatably held within open rectangular slots in upper link, bifurcated movable contact fingers loosely guided for pivotal movement about fixed pin to... | 11/02/1993 |
| 5256873 | Multiple station through beam photoelectric sensor Light emitting diodes of a through beam photoelectric detector are positioned in a door hinged to a sensor body in which the photodetector diodes are located. The light emitting diodes and photodetector diodes are aligned to establish photoelectric sensor... | 10/26/1993 |
| 5233324 | Current transformer for sensing current in an electrical conductor A wire-wound bobbin serves as the core of a current transformer. A magnetic material flux path is disposed on the core that encircles the core coincident with the coils of the bobbin at least once and radially encircles the cross section of the core at le... | 08/03/1993 |
| 5206777 | Three-phase panelboard using standard rated three-pole circuit protective devices in a grounded delta system A neutral connector of a standard three-phase, three-wire panelboard is replaced by a specific multiple termination assembly having a limited number of terminations specifically adapted for connection to ground at the panelboard, for grounding the termina... | 04/27/1993 |
| 5198793 | Electric control apparatus comprising integral electrical conductors plated on a two-shot molded plastic insulating housing A trigger operated speed control wherein the insulating housing is a two-shot molding having metal conductors plated on one of the molding materials on various external and interior surfaces. Stationary contact elements are secured to respective plated co... | 03/30/1993 |
| 5180959 | Electrically controlled shift actuator An electrically controlled shift actuator (2) of the type having a rotatable worm gear wheel (22) driven by a motor (M) to a predetermined one of at least two rotational positions, the wheel having an eccentric drive pin (26) moving a reaction member (14)... | 01/19/1993 |
| 5150257 | High reliability, low intensity back lit SR and NVGC indicator assembly An electronic light valve is disposed over a color fill lens formed in an opaque indicia plate and an infrared filter to be energized to a transmissive condition simultaneously with a low intensity light source to illuminate the legend either by ambient l... | 09/22/1992 |
| 5150092 | Control button adaptor for electric control apparatus A one-piece molded adaptor comprises a rectangular frame having inwardly directed ledges on opposed lateral legs cooperably engagable with projections on a contactor housing normally intended to interlock with an auxiliary contact block housing. The frame... | 09/22/1992 |
| 5138122 | Bi-directional direct current switching apparatus having arc extinguishing chambers alternatively used according to polarity applied to said apparatus Direct current switching apparatus having two arc extinguishing chambers located in a common transverse plane, one chamber being divided into separate laterally spaced portions disposed below the other chamber, a pair of spaced conductors each having a co... | 08/11/1992 |
| 5138150 | Photoelectric proximity sensor having shutter adjustment means for sensing region distance A shutter is manually rotated across a circular aperture and into a light beam projecting through said aperture to selectively block a predetermined proportion of the light beam, thereby reducing intensity of light emitted to shorten the target sensing re... | 08/11/1992 |
| 5132497 | Magnetic shielding means for a current sensor of direct current switching apparatus A Hall effect device is located in a focused gap of a flux concentrator disposed over one power terminal of a D.C. switching contactor to monitor flux induced by current flow. Magnetic fields from permanent magnets of the switching apparatus are shielded ... | 07/21/1992 |
| 5130504 | Bi-directional direct current switching apparatus having bifurcated arc runners extending into separate arc extinguishing chambers Direct current switching apparatus having front and rear arc extinguishing chambers substantially coextensive, the rear chamber being separated into two laterally spaced arc extinguishing chambers, each arc extinguishing chamber comprising rows of non-mag... | 07/14/1992 |
| 5066832 | Plastic enclosure box for electrical apparatus A plastic load center box economically provided by duplicate molded end sections joined by an intermediate section of uniform cross-section which is readily provided in selected lengths in either molded or extruded form. End walls receive metal inserts el... | 11/19/1991 |
| 5063276 | Pushbutton switch with rotational contact wiping action A plunger axially depressible within a tubular housing against a return spring has a conductive pin contact contained within a helically shaped slot through the plunger to project radially from opposite sides of the plunger. A spring biases the pin toward... | 11/05/1991 |
| 5056551 | Fast acting multiple element valve A plurality of slide valve elements having plural axial-spaced annular parts and an internal slide are inserted into a bulkhead in a fluid conduit from a downstream side of the bulkhead, locked in place by a bayonet coupling and set screw, and project thr... | 10/15/1991 |
| 5053592 | Low current switching apparatus having detent structure providing tactile feedback Pivotal movement of a switch actuator drives a finger projecting from the actuator against a convexly bowed leaf spring, depressing an intermediate portion of the leaf spring to an unstable concave condition. The leaf spring resists the actuator movement,... | 10/01/1991 |
| 5047604 | Adapter providing unitary mounting capability for standard circuit breaker An adapter converting a standard plug-on, bolt-in power distribution panelboard type circuit breaker for use in industrial control applications comprises a molded insulating base having a rail engaged by a hook of the circuit breaker and a conductor havin... | 09/10/1991 |
| 5045648 | Locking rocker switch A lock having depending sides with holes therein is snap fit attached to a rocker actuator by causing the sides to straddle the actuator and the holes to receive beveled lateral tabs on the actuator, the holes being longer than the tabs to permit and defi... | 09/03/1991 |
| 5041026 | Switch housing clamping screw A ship-open pressure type wiring terminal for electrical apparatus wherein a threaded hole in the terminal is disposed immediately adjacent and aligned with a clearance opening in a plastic housing part overlying the terminal. One or more thin plastic web... | 08/20/1991 |
| 5024418 | Fluid flow rate control device A poppet is modulated between closed and full open positions by a brushless DC motor operating magnetically through a housing to drive a permanent magnet rotor which carries the poppet. The rotor is supported on several parallel cables which are stationar... | 06/18/1991 |
| 5021645 | Photoelectric color sensor for article sorting A device for photoelectrically sensing the color of a target object includes two more light sources having different characteristic ranges of chromaticity and at least one photosensitive element which receives light from the light sources after it has ref... | 06/04/1991 |
| 5019676 | Auxiliary operator for circuit interrupting apparatus with interlock between switch and housing A removable control unit of a motor control center has an auxiliary operator handle linked to a molded case circuit breaker handle for control of the circuit breaker externally of the motor control center cabinet. An interlock slide bar is driven by the a... | 05/28/1991 |
| 5004873 | Plural set point pressure responsive switching apparatus utilizing a single pressure sensing driver element An actuator having a spring biased button abutting a first electric switch operator button and a flange spaced from an operator button of a second electric switch is driven by a pressure sensing bellows against a Belleville snap spring, the actuator movin... | 04/02/1991 |
| 5004874 | Direct current switching apparatus Direct current switching apparatus having two arc extinguishing chambers each comprising a pair of spaced conductors providing cooperable arc runners divergent toward a row of non-ferromagnetic splitter plates and a stationary contact conductively mounted... | 04/02/1991 |
