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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7498923 | Fast acting, low cost, high power transfer switch A transfer switch comprising a housing and a strip of metal enclosed in the housing, each end extending through the housing as a first connection. At least one first contact is integral to the metal strip. At least one second contact within the housing extends throu... | 03/03/2009 |
| 7205879 | Chisel for a pyromechanical disconnecting device The invention relates to a pyromechanical disconnecting device having a housing (2) in which an electrical conductor (3) is arranged, having a cutting plunger (5) and a cutting chisel (8) made of plastic arranged thereon for severing the ... | 04/17/2007 |
| 6995648 | Fuse barrier and power circuit employing the same A power circuit includes a first low voltage power bus, a second low voltage power bus, a fuse electrically connected between the first low voltage power bus and the second low voltage power bus, and a fuse barrier. The fuse has a non-interrupted state and an interr... | 02/07/2006 |
| 6380837 | Slow acting fuse with wide range of current ratings A fuse assembly is provided having two fusible elements, electrically in parallel with each other, thereby providing the fuse assembly with increased inrush current withstand capacity, a greater range of current ratings and lower temperature rise at highe... | 04/30/2002 |
| 5982270 | Thermal fuse A thermal fuse includes a first electrical contact extending through and engaged in electrical contact with a second contact. A spring is compressed between the first and second contacts. A thermally deformable pin retains the second contact against the c... | 11/09/1999 |
| 5596306 | Form fitting arc barrier for fuse links Fuses and a subassembly component for fuses. The fuse includes an insulating housing, a short circuit fusible element, and an arc barrier-forming body. The arc barrier-forming body is fitted around, and intimately surrounds a portion of the short-circuit ... | 01/21/1997 |
| 5406244 | Time delay fuse A time delay fuse that includes a trigger mechanism and fusible element within a cylindrical fuse casing that is closed by end ferrules. The trigger mechanism includes a plunger, a spring, and a cylindrical shell that contains the spring and plunger in a ... | 04/11/1995 |
| 5355110 | Dual element fuse An electrical interruption device is disclosed in which an overcurrent protective device is provided to interrupt electric current flow on a sustained overcurrent current occurring. The overcurrent protective device is characterized by a plunger which is ... | 10/11/1994 |
| 5343185 | Time delay fuse with mechanical overload device A fuse including a tubular casing, first and second blade-shaped terminals extending from respective sides of the casing, a short circuit fusible element attached to the first terminal, a heater attached to the second terminal, and a time delay overcurren... | 08/30/1994 |
| 5254967 | Dual element fuse An electrical interruption device is disclosed in which a space efficient spiral spring activates current interruption. The spring is characterized by coils which wind continuously about and approach a central axis, with successive coils of the spring hav... | 10/19/1993 |
| 5247274 | Trigger mechanism for time-delay fuses A time-delay fuse having a fuse element with a series of weak spots surrounded by a loose sand filler. The fuse element is connected to a trigger mechanism by solder or other meltable alloy. The trigger section provides overload protection and the fuse el... | 09/21/1993 |
| 5235306 | Fuse assembly The improved fuse assembly includes a trigger assembly having an electrically nonconductive barrel for receiving a spring loaded trigger therein and a heater strip disposed along the outer circumferential surface of the barrel with a pair of end flaps. On... | 08/10/1993 |
| 5187463 | Compact time delay fuse A time delay fuse including a fusible element for short circuit protection and a spring-loaded plunger partially contained in an enclosure and restrained by a solder mass for time-delayed overcurrent protection, the fusible element including a segment ext... | 02/16/1993 |
| 5077534 | Class J time delay fuse A time-delay fuse (10) having parallel fusible element (22). The fuse element (22) is connected to a trigger mechanism (30) by solder or other meltable alloy. The trigger section (30) provides overload protection and the parallel fuse element (22) provide... | 12/31/1991 |
| 5075664 | Spring timer for fuse A trigger for a dual element time delay fuse includes a paper cap and a heater strip having locating ears thereon.... | 12/24/1991 |
| 5043689 | Time delay fuse A time delay fuse including a fuse casing, a preassembly including a wall member, a pin passing through a hole through the wall member, solder on one side of the wall member restraining the pin from movement through the hole and electrically connecting a ... | 08/27/1991 |
| 4888573 | Fuse construction A dual element cylindrical line fuse includes an insulating assembly disposed midway along an insulating tube. A metal eyelet having a barrel with a closed end is disposed through the assembly and retains an electrically conductive coil in place around th... | 12/19/1989 |
| 4782317 | Low voltage rejection fuse having an insulating insert A current limiting cartridge fuse having a portion of restricted diameter in one end cap, which serves as a rejection feature, is provided with an insulating insert which cooperates with the fuse casing and the one end cap to allow an active portion of a ... | 11/01/1988 |
| 4771259 | Electric protective device and method for manufacturing same A connecting apparatus for connecting one end of a spring of a time-delay fuse to a hollow body of the fuse and a method for its manufacture is disclosed. The apparatus includes two transverse slots formed in the end of the body. An insert is placed in th... | 09/13/1988 |
| 4727347 | Time delay electrical fuse and method of making same The present invention relates generally to a three chamber ferrule type fuse comprising a tube of dielectric material having a tube wall and a bore, providing a unitary sub-assembly comprising a plunger and plunger guide, and two short circuit elements, a... | 02/23/1988 |
| 4611192 | Heavy-duty time-delay fuse A heavy-duty, time-delay fuse includes a pair of heat sinks having mutually facing, generally planar contact surfaces normally eutectically soldered to each other. A spring between the heat sinks is operative for urging the contact surfaces apart from eac... | 09/09/1986 |
| 4593262 | Time delay indicator fuse A fuse (12) for protecting a circuit and comprising a tube (14) of insulating material having an inner wall surface (16) and an outer wall surface (18) so as to form a fuse housing. The fuse includes two opposite axial ends (20) and (22), and a first (24)... | 06/03/1986 |
| 4562420 | Time delay fuse A time delay fuse comprises an initially open end insulating housing having conductive terminals at the opposite ends thereof, a current-heatable strip connected to one of said terminals, a thermal mass in heat communication with the current-heatable stri... | 12/31/1985 |
| 4559513 | Trigger mechanism for dual-element fuse A generally U-shaped connector is included in a current limiting fuse having first and second interior conductor members. The connector is disposed between the first and second conductor members, and completes an electrical circuit therebetween. The first... | 12/17/1985 |
| 4533895 | Time delay fuse A slow-blow electrical fuse structure features one or more conducting fuse links for high-current blow-out protection and located in individual chambers filled with arc-quenching filler and in thermal contact with a spring-loaded piston-and-guide structur... | 08/06/1985 |
| 4321574 | Time delay dual element fuse with greater blowing time accuracy A dual element, time delay fuse with greater blowing time accuracy and improved operating characteristics wherein any bridging of the circuit opening air gaps by molten alloy is effectively precluded during operation of the fuse, especially operation init... | 03/23/1982 |
| 4055827 | Electric fuse The electric time-lag fuse involves a substantially T-shaped shorting strip shorting the insulating gap formed between a pair of metal overlays on an insulating strip, and a helical tension spring having a variable diameter affixed with one of the ends th... | 10/25/1977 |
| 4053861 | Electric time-lag fuse having a small current rating A narrow strip of metal-clad material, as used in printed circuitry, is placed inside the casing of a fuse taking the place of the fusible conductor or element. The metal layer is, in part, removed from the strip by etching, or otherwise, leaving a centra... | 10/11/1977 |
| 4048610 | Electric protective device and process of manufacturing the same An electric protective device capable of handling both short-circuit currents and minor overload currents of impermissible duration. The device for interrupting small overload currents of impermissible duration includes a cylinder, a plunger inside said c... | 09/13/1977 |
