Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7451753 | Pre-heating of a liquid in an aircraft reservoir An electric motor thermally associated with a liquid reservoir of an aircraft engine is selectively operated to generate heat for pre-heating a liquid in a reservoir prior to engine start. ... | 11/18/2008 |
| 7362018 | Encoder alternator An encoder alternator for an internal combustion engine has a rotor with a plurality of circumferential magnetic rotor poles in a periodic pattern except for at least one magnetic irregularity. A sensor coil is wound around a stator pole and outputs a crankshaft pos... | 04/22/2008 |
| 7249586 | Apparatus and method for limiting excessive engine speeds in a light-duty combustion engine A controlled slow down apparatus and method for use in the event that a light-duty combustion engine has entered a state of excessive speeds or auto-ignition. The controlled slow down method is preferably initiated when the engine speed exceeds an activation speed f... | 07/31/2007 |
| 6932064 | Capacitor discharge ignition A capacitor discharge ignition (CDI) system includes a trigger circuit that generates a trigger signal in synchronism with operation of an engine for discharging an ignition capacitor. A timing circuit is connected to the trigger circuit for controlling the timing o... | 08/23/2005 |
| 6603216 | Exciter circuit with ferro-resonant transformer network for an ignition system of a turbine engine An exciter circuit for firing one or more igniter plugs in an aircraft ignition system. The exciter circuit includes an input node capable of receiving an alternating-current (AC) voltage with a variable frequency and amplitude, a pair of tank capacitors ... | 08/05/2003 |
| 6550462 | Engine ignition system In an engine ignition system that includes a rotor that rotates in synchronism with rotation of an engine, an iron core fixedly disposed opposite the outer periphery of the rotor, and a primary coil and a secondary coil that are wound concentrically aroun... | 04/22/2003 |
| 6009865 | Low speed ignition system A capacitor discharge type ignition system for an internal combustion engine has a secondary charge coil mounted on a ferromagnetic core adjacent to a primary charge coil and an ignition coil, and means for selectively providing current from a battery to ... | 01/04/2000 |
| 5931137 | Discharge ignition apparatus for internal combustion engine having automatic spark advance An improved capacitive discharge ignition apparatus provides spark advance with engine speed. The ignition apparatus includes at least one trigger circuit including a trigger coil preferably contained in a common housing with other circuit elements. In th... | 08/03/1999 |
| 5645037 | Ignition system for an internal combustion engine, particularly for use in a chain saw or the like An ignition system for an internal combustion engine having a magnetically conducting core with at least three legs and supporting a charging winding and a triggering winding. A flywheel, having at least one magnetic field generating member, cooperates wi... | 07/08/1997 |
| 5606958 | Ignition system for an internal-combustion engine, particularly for use in a chain saw or the like Ignition system for an internal-combustion engine, in particular for use in a chain saw or the like, comprising a magnetically conducting core supporting a charging winding and a triggering winding, a flywheel having at least one magnetic field generating... | 03/04/1997 |
| 5513619 | Discharge ignition apparatus for internal combustion engine An improved capacitive discharge ignition system utilizes a permanent magnet assembly revolving in synchronism with operation of an internal combustion engine to generate spark energy. The relatively high voltage necessary to initiate an ignition spark is... | 05/07/1996 |
| 5072714 | Arrangement for generator windings, especially in ignition systems The invention relates to a generator arrangement, in particular, ignition systems for internal combustion engines. The arrangement comprises a multi-legged core of magnetically conducting material with the legs radially projecting towards a cooperating ma... | 12/17/1991 |
| 4949696 | Capacitor ignition systems Capacitor ignition systems for internal combustion engines in which a charging winding forms part of an ignition coil and a primary winding is connected in circuit with the charging winding to contribute to capacitor charging. In one embodiment, the secon... | 08/21/1990 |
| 4709669 | Ignition arrangement for an internal combustion engine of a handheld portable tool The invention is directed to an ignition arrangement for an internal combustion engine of a handheld portable tool such as a chain saw or the like. The engine has a crankshaft and a fan wheel is seated on the crankshaft for rotation therewith. The ignitio... | 12/01/1987 |
| 4641627 | Ignition module A ignition module for an ignition system originally fitted with mechanical breaker points. The module comprising a drive winding adapted to be circumferentially received about one of the legs of a core for generating a first induced voltage signal in resp... | 02/10/1987 |
| 4636671 | Magneto generator for internal combustion engine A magneto generator for a motorcycle engine having a flywheel, in which a plurality of magnets are circumferentially arranged at equal intervals, a certain number of adjacent magnets have the same polarity at their inner surfaces, and N- and S-pole altern... | 01/13/1987 |
| 4620521 | Modular, programmable high energy ignition system The ignition system for providing spark ignition to the cylinders of an internal combustion engine includes a generator assembly adapted to be mounted on said engine. This generator assembly includes a magneto adapted to be driven in response to the opera... | 11/04/1986 |
| 4611570 | Capacitive discharge magneto ignition system A capacitive discharge magneto ignition system comprising a magneto (10) for generating an ignition spark through a plurality of ignition coils (66,68). The magneto (10) supports a plurality of coils (40,42) on its center pole (20) or leg and a separate p... | 09/16/1986 |
| 4515140 | Contactless ignition device for internal combustion engines A contactless ignition device for internal combustion engines comprising an exciter coil and pulser coil inducing voltages of phases reverse to each other with the rotation of the internal combustion engine, a first capacitor and second capacitor charged ... | 05/07/1985 |
| 4418296 | Magneto-generator for engine ignition systems A magneto-generator for engine ignition has a cup-shaped pole-wheel with a multiplicity of magnet poles (13) within which is a stationary star-shaped armature having generator windings (20) on the outwardly extending pole legs. A pulse generator (24) is b... | 11/29/1983 |
| 4406271 | Capacitor discharge ignition system and method of manufacture thereof A capacitor discharge ignition system is provided in a self-contained hermetically sealed housing having improved component packaging. The capacitor discharge ignition system includes an ignition coil and an auxiliary coil for charging a capacitor of the ... | 09/27/1983 |
| 4399801 | Overrun prevention ignition system with ignition angle retardation circuit Our overrun prevention ignition system of the capacitor discharge type includes an ignition angle retarding circuit for retarding the ignition angle by an overlapping period between an ignition signal and a predetermined conduction period of a switching t... | 08/23/1983 |
| 4288834 | Breakerless magneto ignition A breakerless magneto ignition system having a stator assembly including an ignition coil and core. A solid state gate turn-off switch (GTO) is connected by its anode-cathode electrodes in circuit with the primary winding of the ignition coil for conducti... | 09/08/1981 |
| 4275322 | Ignition system with active pulse discriminating means Disclosed herein is a rotary pulse generator including an armature having a two-magnet assembly including spaced pole pieces defining a pair of spaced gaps, an armature plate including a charge core and charge coil mounted thereon, and a trigger core and ... | 06/23/1981 |
| 4259938 | Apparatus in electronic ignition systems The invention relates to an apparatus for providing capacitor charging and triggering in so-called electronic ignition systems comprising flywheel magnetos with a plurality of poles. The triggering pulses are arranged phase-shifted in time in relation to ... | 04/07/1981 |
| 4215284 | Pole-shoe magnet group for magnetomotive device A pole-shoe magnet group assembly for a magnetomotive device such as a magneto for the ignition system of an internal combustion engine. The group carried by the rotor includes a permanent magnet and a pair of pole-shoes extending generally circumferentia... | 07/29/1980 |
| 4181114 | Circuit arrangement for electronic ignition apparatus An electronic ignition system for use with a flywheel having a magnet comprises a unitary core carrying a trigger coil, an ignition coil and a charging coil, the latter being coupled through a charging rectifier and a storage capacitor to the ignition coi... | 01/01/1980 |
| 4170977 | Ignition system A means for readily converting the ignition system of an existing internal combustion engine to a solid state capacitive discharge ignition system which comprises an auxiliary coil, a primary ignition coil and a secondary ignition coil wound on a single l... | 10/16/1979 |
| 4120277 | Breakerless magneto device The embodiments of the breakerless magneto device disclosed herein have a rotor with a permanent magnet imbedded in the periphery thereof which acts in cooperation with the first and second magneto cores to generate a varying flux field in the cores. The ... | 10/17/1978 |
| 4036201 | Single core condenser discharge ignition system A breakerless condenser discharge ignition system for an internal combustion engine and excited by a rotating permanent magnet, consists of a single module, containing a number of windings and electrical components, mounted on one pole of a ferromagnetic ... | 07/19/1977 |
| 3998197 | Signal source for use in a breakerless ignition system for an internal combustion engine A signal source for use in a breakerless ignition system for an internal combustion engine provided outside a bowl-like flywheel of a flywheel type magneto generator, but cooperating with at least one of a plurality of permanent magnets in said magneto ge... | 12/21/1976 |
| 3960128 | Capacitor discharge ignition system A capacitor discharge ignition circuit in which charging, trigger and shutoff coils are wound as a single coil and disposed on one leg of a two-legged magnetic core.... | 06/01/1976 |
| 3955549 | CD ignition system with anti-reverse feature A capacitor-discharge ignition system for a two-stroke internal combustion engine has a trigger coil which during forward rotation of the crankshaft discharges a capacitor through the primary coil of an ignition transformer to produce an appropriately tim... | 05/11/1976 |
