US3853108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state ignition
Assignee: Solitron Devices Inc
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Filing: 1973-03-12
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Granted: 1974-12-10
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Expires: 1993-03-12
Abstract
Abstract A magnetically-pulsed, semiconductor controlled ignition system with a signal means comprising balanced transistors interconnected to supply trigger signals of substantially constant magnitude regardless of operating conditions such as engine speed and ambient temperature, said means being temperature compensated.
Inventors
- 👤 G Adams
- 👤 J Defilippis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:26
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P3/00; F02P3/02; F02P3/04; F02P3/0407; F02P3/0435; F02P7/02; F02P7/021; F02P7/026; F02P7/028
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
244 words
An ignition system including a sensor means operatively associated with a circuit including devices to amplify, define and switch current in accordance with a pulse from said sensor means and ignition coil means for delivering a high potential spark from said ignition system as called for by said semiconductor means said ignition system comprising the improvement to said sensor means of: a permanent magnet; a pickup arm connected to said magnet at one pole surface thereof having a plurality of plates of progressively lesser length at one end to form a triangle on said end whose apex is along a centerline for said pickup arm; a coil around said arm having leads extending therefrom to sense inductance change in said arm and provide an alternating current potential wave form as said inductance rises and falls; and electronic means (adjacent said arm and connected to each of the leads from said coil and to each other to track together and provide a temperature compensated source of signals for said circuit) comprising transistors affixed to said pick-up arm having their respective bases connected to each of said leads, their collectors connected to each other by a resistance means and to one side of a power source, a resistor connected between the collector of one transistor and to the lead to the base connection of one of said transistors and having their emitters connected together with a lead therefrom to the other side of said power source.
Claim 2
Dependent Claim
244 words
An ignition system including a sensor means operatively associated with a circuit including devices to amplify, define and switch current in accordance with a pulse from said sensor means and ignition coil means for delivering a high potential spark from said ignition system as called for by said semiconductor means said ignition system comprising the improvement to said sensor means of: a permanent magnet; a pickup arm connected to said magnet at one pole surface thereof having a plurality of plates of progressively lesser length at one end to form a triangle on said end whose apex is along a centerline for said pickup arm; a coil around said arm having leads extending therefrom to sense inductance change in said arm and provide an alternating current potential wave form as said inductance rises and falls; and electronic means (adjacent said arm and connected to each of the leads from said coil and to each other to track together and provide a temperature compensated source of signals for said circuit) comprising transistors affixed to said pick-up arm having their respective bases connected to each of said leads, their collectors connected to each other by a resistance means and to one side of a power source, a resistor connected between the collector of one transistor and to the lead to the base connection of one of said transistors and having their emitters connected together with a lead therefrom to the other side of said power source.
Claim 3
Dependent Claim
19 words
The improvement of claim 1 wherein said sensor is potted in epoxy bonded and located thereby on a plate.
Claim 4
Dependent Claim
50 words
The improvement of claim 2 wherein said plate is movably related to a distributor plate to adjustably locate said sensor in an engine distributor with respect to an engine driven cam having lobes equal in number to the required sparks for said ignition system for operation of an engine thereby.
Claim 5
Dependent Claim
84 words
The improvement of claim 3 wherein said electronic means comprises transistors affixed to said pick-up arm having their respective bases connected to each of said leads, their collectors connected to each other by a resistance means and to one side of a power source, a resistor connected between the collector of one transistor and to the lead to the base connection of one of said transistors and having their emitters connected together with a lead therefrom to the other side of said power source.
Claim 6
Dependent Claim
57 words
The improvement of claim 1 wherein said other side of said power source is provided by the distributor plate and the one side of said power source is provided by a single lead to the interior of the distributor means whose opposite end of said lead connects to said one side of said power source externally thereof.
Claim 7
Dependent Claim
27 words
The improvement of claim 5 wherein said single lead connects to said other side of said power source in series with said circuit and an ignition switch.
Claim 8
Dependent Claim
96 words
The improvement of claim 6 wherein said circuit includes an emitter follower receiving the pulse from said sensor connected to operate a Schmidt trigger in turn connected to an emitter follower stepping down impedance of the signal from said Schmidt trigger which is then connected to and passed by a resistance capacitance network for a time as expressed by RC Tsec, said network delivering a pulse wave form to a transistor also connected to the RC network to be controlled thereby to in turn control a Darlington amplifier for delivery of a signal from said circuit.
Claim 9
Dependent Claim
71 words
The improvement of claim 7 and further characterized by the inclusion with the ignition coil means of electronic means for receiving the signal of said Darlington amplifier and switching said power source on and off with respect to a primary winding of said ignition coil means whereby said coil may be charged, and discharged, as by switching said power source off creating a high potential in a secondary winding thereof, respectively.
Claim 10
Dependent Claim
25 words
The improvement of claim 8 whrein said electronic means includes a switching transistor and a circuit with devices protecting against reverse spikes and over potential.
Claim 11
Dependent Claim
71 words
The improvement of claim 1 wherein the triangular end of said pickup arm has a surface on a plane to either side of the apex of a greater angle with the center line thereof than surfaces to either side of a cam lobe adjacent thereto by which a magnetic circuit is completed from said one pole surface via said arm and cam lobe to an opposite pole surface of said magnet.
Claim 12
Dependent Claim
237 words
A distributor means for an internal combustion engine comprising: a housing; a movable distributor plate within said housing; a rotable shaft extending through said plate; a cam with a plurality of lobes connected to said shaft above said distributor plate; an adjustable plate adapted to be movable to a predetermined position and thereafter fixed in location on said distributor plate; a magnet secured to said adjustable plate to have one pole on said adjustable plate and its opposite pole upwardly thereof; a pickup arm affixed to said magnet on said opposite pole and extending towards said cam to have a slight clearance between its end and said lobes of said cam; a pickup coil about said arm between said magnet and the end of said arm adjacent but having slight clearance from said lobes, said coil having a substantial air gap from said adjustable plate and leads projecting therefrom; (electronic) transistor means behind said pickup coil on said pickup arm, said transistor means operatively connected to said leads and having a lead connected to said adjustable plate and another lead attached to a terminal; and means to enclose said pickup arm, said magnet, said (electronic) transistor means and said leads leaVing said terminal exposed locating all with respect to each other and bonding all to said adjustable plate to thereby permit adjustment of said plate to provide proper predetermined clearance of said arm and said cam lobes.
Claim 13
Dependent Claim
237 words
A distributor means for an internal combustion engine comprising: a housing; a movable distributor plate within said housing; a rotable shaft extending through said plate; a cam with a plurality of lobes connected to said shaft above said distributor plate; an adjustable plate adapted to be movable to a predetermined position and thereafter fixed in location on said distributor plate; a magnet secured to said adjustable plate to have one pole on said adjustable plate and its opposite pole upwardly thereof; a pickup arm affixed to said magnet on said opposite pole and extending towards said cam to have a slight clearance between its end and said lobes of said cam; a pickup coil about said arm between said magnet and the end of said arm adjacent but having slight clearance from said lobes, said coil having a substantial air gap from said adjustable plate and leads projecting therefrom; (electronic) transistor means behind said pickup coil on said pickup arm, said transistor means operatively connected to said leads and having a lead connected to said adjustable plate and another lead attached to a terminal; and means to enclose said pickup arm, said magnet, said (electronic) transistor means and said leads leaVing said terminal exposed locating all with respect to each other and bonding all to said adjustable plate to thereby permit adjustment of said plate to provide proper predetermined clearance of said arm and said cam lobes.
Claim 14
Dependent Claim
86 words
A means to provide pulses by sensing an inductance change in a pickup arm completing a magnetic circuit, said means comprising: a pickup coil about said arm; and a pair of transistor means attached to said coil to be controlled by alternating current potentials from said coil including means connecting one transistor of said pair of transistor means to another transistor to provide a constant bias at the base of said one transistor (to provide temperature compensation for delivery of pulses over an extremely wide range).
Claim 15
Dependent Claim
86 words
A means to provide pulses by sensing an inductance change in a pickup arm completing a magnetic circuit, said means comprising: a pickup coil about said arm; and a pair of transistor means attached to said coil to be controlled by alternating current potentials from said coil including means connecting one transistor of said pair of transistor means to another transistor to provide a constant bias at the base of said one transistor (to provide temperature compensation for delivery of pulses over an extremely wide range).
Claim 16
Dependent Claim
97 words
The structure of claim 12 and further characterized in that said pickup arm is comprised of laminations that are of varying length to form an angled end extending beyond the coil opposite the end attached to said magnet whereby a low reluctance path is created giving the maximum inductance within the coil as the air gap narrows at the apex of the angled end and not at the side surfaces thereof whereby the highest potential in the coil only occurs when said circuit is via the apex of said arm and sharply lower to each side thereof.
Claim 17
Dependent Claim
33 words
The structure of claim 13 and further comprising a distributor means for mounting said plate therein such that said apex is located with respect to a rotating cam means of said distributor means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |