US3569727A - Control means for pulse generating apparatus - Google Patents
Control means for pulse generating apparatus Download PDFInfo
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- US3569727A US3569727A US3569727DA US3569727A US 3569727 A US3569727 A US 3569727A US 3569727D A US3569727D A US 3569727DA US 3569727 A US3569727 A US 3569727A
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- circuit
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- solenoid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/001—Ignition installations adapted to specific engine types
- F02P15/003—Layout of ignition circuits for gas turbine plants
Definitions
- a condenser discharge type electrical pulse generating circuit such as for a combustion engine ignition system, in combination with means for automatically disabling said circuit after operation for an interval within a predetermined range, the combination being such that the disabling means may be selectively bypassed and such that recycling of said means may be effected following an interruption of power input.
- CONTRQL MEANS FOR PULSE GENERATING AfPARATUS This invention relates to electrical apparatus and more particularly to means for controlling the operation of electrical pulse or spark generating apparatus.
- An object of the present invention is to provide novel control means for automatically disabling an electrical pulse or spark generating apparatus after a predetermined operating interval.
- Another object of the invention is to provide means operable in a novel manner in response to intermittent signals or pulses to control the operation of an electrical pulse generating system or the like.
- a further object is to provide apparatus of the above character wherein the control or disabling means may be by passed and hence, rendered ineffective and wherein said means may be recycled following an interruption of the power supply.
- Another object of the invention is to provide a pulse generating system wherein the pulse rate is reasonably constant over a wide range of temperatures in combination with means responsive to the pulse rate for disabling the system after a predetermined interval of operation.
- the single embodiment of the invention illustrated in the drawing comprises an electrical pulse or spark generating circuit of known construction adapted for use as an untimed ignition system for jet or gas turbine type engines.
- the invention is not, however, limited to such uses or systems.
- the ignition circuit is of the condenser discharge type which may be energized in a known manner by a suitable source 2 of alternating or interrupted electrical current. Said source may be selectively connected by means of a switch 3 across input terminals H and B or H and C and thence, to the primary winding 4 of a power input transformer having a secondary winding 5.
- suitable radio frequency filtering means 6 which may be in the form of any of various known constructions, is preferably, although not necessarily, interposed between the power source 2 and transformer 4, 5.
- a voltage doubling type of energy storage means is connected across secondary winding 5 vto be incrementally charged thereby.
- said storage means comprises a small condenser 7 connected across winding 5 through a diode or half wave rectifier 8, a second small condenser 9 connected across said winding through a reversely polarized diode or half wave rectifier 10, and a main relatively large tank condenser 11 connected across condensers 7 and 9 in series.
- the rectifier means 8 may be protected against damage, the operating life thereof may be enhanced, and the required rating thereof may be minimized by providing either or both of thecurrent limiting resistors 12 and 14 in the circuit, as shown.
- One side of the above-described energy storage means is grounded at 15, and the high potential side thereof is connected through a control gap 16 to the ungrounded electrode of an ignition spark gap 17.
- the latter is diagrammatically shown as a shunted surface or low voltage type gap or igniter, but may be of any other known type.
- suitable known means may be provided for ionizing igniter gap 17 to thus reduce its sparkover voltage.
- said means includes a high frequency setup transformer comprising primary winding 18 and secondary winding 19, the latter. being interposed between gaps 16 and 17
- Primary winding 18 is connected in series with a triggering condenser 20 and a resistor 21 across tank condenser 11.
- Condensers 11 and 20 are thus concurrently charged to approximately the same voltage by the output of transformer 4, 5.
- condenser 20 When the charge on condenser 20 attains the predetermined onset or breakdown voltage of control gap 16, said condenser will discharge across the gap through primary winding 18, thereby inducing a stepped-up voltage across secondary winding 19 of sufficient potential to break down and ionize ign'iter gap 17.
- the high energy charge stored on condenser 11 can then be discharged through gaps l6 and 17 in series to provide the required high energy ignition spark at gap 17 in the engine combustion chamber.
- a condenser 22 may be connected across secondary winding 5.
- the present invention contemplates novel means for automatically disabling the pulse generating or ignition system after a short period of operation by effecting a suitable reduction in the voltage applied to the primary winding 4 without disconnecting the system from power source 2.
- said means embodies parallel or shunt connected branches in the power input system when source 2 is connected across terminals H and B and means responsive to the discharging of tank condenser 11 for interrupting one of said branches.
- Novel control or timing means responsive to the pulse or sparking rate of the ignition system are provided for effecting the opening of the circuit at switch 25 to thereby automatically disable said system after the same has been operated for approximately a predetermined interval as measured by time or number of sparks or discharge pulses following connection at terminal B.
- Said timing means comprises a suitable signal pickup device capable of transmitting a series of electrical pulses to incrementally charge a capacitor.
- suitable pickup devices may be used, the one chosen for illustration, by way of example, comprises an induction transformer, the primary winding 30 of which is connected in series with a condenser 31 across control gap 16.
- a voltage pulse is applied across primary winding 30 and a voltage pulse is induced in secondary winding 32.
- the currents thus intermittently generated in secondary winding 32 are rectified by a full wave bridge rectifier 33 and transmitted to a storage condenser 34 through a diode 35.
- a trigger gap 36 having a predetermined break-down or onset voltage is connected in series with a winding 37 across condenser 34.
- the latter winding forms a part of solenoid S for opening the contacts of switch 25.
- the interval or number of pulses required to charge condenser 34 to the breakdown voltage of trigger gap 36 may be varied by means of an adjustable resistor connected in parallel with secondary winding 32.
- an adjustable resistor is illustrated in the form of an inductive resistance 38 with an adjustable ferrite core.
- a reduction of this resistance by adjustment of the core reduces the effective input signal and thereby increases the charging time of condenser 34.
- the illustrated network comprises two thermistors 39 of known construction and a resistor 40 connected in parallel with each other and in series with a resistor 41. The thermistor network is effective to compensate for increased leakage losses in condenser 34 at the higher temperatures.
- a bleed resistor 42 is connected in series with a switch, such as a normally closed reed switch 43, across condenser 34. Suitable means are provided for maintaining switch 43 open whenever voltage is applied to terminals H-B, said means in the form shown comprising a solenoid coil 44.
- Said coil is connected between lead 26 and ground at 45 through a resistor 46 and a full wave bridge rectifier 47 and hence, is energized to electromagnetically maintain switch 43 open when the source voltage is applied to terminals H-B.
- switch 43 closes automatically and any charge remaining on condenser 34 is quickly dissipated in resistor 42.
- Micro- Condensers farads 7 and 9 34 5 Resistors: Ohms 12, 14, 40 and 42 1, 000 600 Primary/ Secondary Turns Transformers: Ratio 30, 32 a 30/24 Windings Turns 29 9,000
- Electrical apparatus comprising a source of electrical energy, an electrical pulse generating circuit, means connecting said source to said circuit to energize the latter for generating pulses, and means powered by the energy of the pulses generated in said circuit for varying the resistance of said connecting means sufficiently to effectively reduce the energization of said circuit by said source below that required for the generation of pulses therein while current flow through the connecting means is continuous.
- pulse powered means comprises energy storage means and means coupling said circuit to said storage means for charging the latter.
- said storage means comprises a capacitor adapted to be incrementally charged by pulses in said circuit.
- said pulse powered means further comprises a control gap and a solenoid coil connected in series across said capacitor.
- Electrical apparatus comprising a source of electrical energy, an electrical pulse generating circuit, means connecting said source to said circuit to apply voltage thereto of sufficient potential to generate pulses therein, and means powered by the energy of the pulses generated in said circuit to reduce the voltage applied to said circuit to a potential below that.
- said source-to-circuit connecting means comprises normally closed switch means, and including solenoid means for electromagnetically actuating said switch means.
- said solenoid means comprises a first winding energizable by said pulse powered means to actuate said switch means to open position.
- said solenoid means comprises a second winding in said source-to- 5 circuit connecting means energizable by said source to electromagneti'callyhold said switch means in open position.
- said pulse generating circuit includes a capacitor adapted to be intermittently charged and discharged and wherein said pulse I0 powered means comprises energy storage means connected to be incrementally charged by the discharges of said capacitor.
- said source-to-circuit connecting means comprises first and second branches adapted to be connected in parallel, one of said branches including normally closed switch means.
- Electrical apparatus as defined in claim 13 comprising means for normally holding said switch means in a first position to close said first branch, and electromagnetic means including a solenoid winding for actuating said switch means to a second position to open said first branch.
- Electrical apparatus as defined in claim 14 comprising means powered by the energy of pulses in said circuit for energizing said solenoid winding to actuate said switch means to open said first branch.
- said electromagnetic means includes a solenoid winding in said second branch, the magnetic field of which is insufficient to actuate said switch means from its first to second position but is sufiicient to hold said switch means in said second position.
- said pulse powered means comprises energy storage means connected to be charged by energy supplied from said circuit and.
- Electrical apparatus as defined in claim 4 comprising normally closed switch means in said source-to-circuit connecting means adapted to be opened in response to the discharge of said capacitor.
Abstract
Description
Claims (19)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US76356968A | 1968-09-30 | 1968-09-30 |
Publications (1)
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US3569727A true US3569727A (en) | 1971-03-09 |
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US3569727D Expired - Lifetime US3569727A (en) | 1968-09-30 | 1968-09-30 | Control means for pulse generating apparatus |
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Cited By (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3772601A (en) * | 1972-09-11 | 1973-11-13 | Rca Corp | Dual channel balanced line type modulator |
WO1994005909A1 (en) * | 1992-09-09 | 1994-03-17 | Unison Industries Limited Partnership | Free-running capacitive discharge ignition system with spark frequency control |
US5561350A (en) * | 1988-11-15 | 1996-10-01 | Unison Industries | Ignition System for a turbine engine |
EP0789144A2 (en) * | 1996-02-09 | 1997-08-13 | Cooper Industries, Inc. | A turbine engine ignition exciter circuit incluiding low voltage lockout control |
US5754011A (en) * | 1995-07-14 | 1998-05-19 | Unison Industries Limited Partnership | Method and apparatus for controllably generating sparks in an ignition system or the like |
US6484707B1 (en) | 2000-09-29 | 2002-11-26 | Unison Industries, Inc. | Method and apparatus for generating a sustained arc at a sparking device |
US6661239B1 (en) * | 2001-01-02 | 2003-12-09 | Irobot Corporation | Capacitive sensor systems and methods with increased resolution and automatic calibration |
US6670777B1 (en) | 2002-06-28 | 2003-12-30 | Woodward Governor Company | Ignition system and method |
US6771519B2 (en) | 2000-09-29 | 2004-08-03 | Unison Industries, Inc. | Method and apparatus for generating high voltage |
US20040156162A1 (en) * | 2003-02-11 | 2004-08-12 | Magne Nerheim | Dual operating mode electronic disabling device for generating a time-sequenced, shaped voltage output waveform |
US20050276000A1 (en) * | 2004-06-15 | 2005-12-15 | Wilmot Theodore S | Solid state turbine engine ignition exciter having elevated temperature operational capabiltiy |
US20060256498A1 (en) * | 2003-10-07 | 2006-11-16 | Taser International, Inc. | Systems and methods for immobilization using charge delivery |
US20070213892A1 (en) * | 2001-06-12 | 2007-09-13 | Irobot Corporation | Method and System for Multi-Mode Coverage For An Autonomous Robot |
US20080047092A1 (en) * | 2006-05-19 | 2008-02-28 | Irobot Corporation | Coverage robots and associated cleaning bins |
US20080058987A1 (en) * | 2005-12-02 | 2008-03-06 | Irobot Corporation | Navigating autonomous coverage robots |
US20080140255A1 (en) * | 2005-02-18 | 2008-06-12 | Irobot Corporation | Autonomous surface cleaning robot for wet and dry cleaning |
US20080134457A1 (en) * | 2005-02-18 | 2008-06-12 | Irobot Corporation | Autonomous surface cleaning robot for dry cleaning |
US20080204965A1 (en) * | 2005-09-13 | 2008-08-28 | Brundula Steven N D | Systems And Methods For Immobilization Using A Compliance Signal Group |
US20080276407A1 (en) * | 2007-05-09 | 2008-11-13 | Irobot Corporation | Compact Autonomous Coverage Robot |
US20080292748A1 (en) * | 2007-05-25 | 2008-11-27 | Sapporo Breweries Limited | Process for production of an effervescent alcoholic beverage |
US20100037418A1 (en) * | 2005-12-02 | 2010-02-18 | Irobot Corporation | Autonomous Coverage Robots |
US20100082193A1 (en) * | 2004-07-07 | 2010-04-01 | Mark Joseph Chiappetta | Celestial navigation system for an autonomous vehicle |
US20110077802A1 (en) * | 2005-12-02 | 2011-03-31 | Halloran Michael J | Robot System |
US20110131741A1 (en) * | 2002-01-03 | 2011-06-09 | Jones Joseph L | Autonomous Floor-Cleaning Robot |
US8253368B2 (en) | 2004-01-28 | 2012-08-28 | Irobot Corporation | Debris sensor for cleaning apparatus |
US8368339B2 (en) | 2001-01-24 | 2013-02-05 | Irobot Corporation | Robot confinement |
US8386081B2 (en) | 2002-09-13 | 2013-02-26 | Irobot Corporation | Navigational control system for a robotic device |
US8382906B2 (en) | 2005-02-18 | 2013-02-26 | Irobot Corporation | Autonomous surface cleaning robot for wet cleaning |
US8390251B2 (en) | 2004-01-21 | 2013-03-05 | Irobot Corporation | Autonomous robot auto-docking and energy management systems and methods |
US8412377B2 (en) | 2000-01-24 | 2013-04-02 | Irobot Corporation | Obstacle following sensor scheme for a mobile robot |
US8417383B2 (en) | 2006-05-31 | 2013-04-09 | Irobot Corporation | Detecting robot stasis |
US8428778B2 (en) | 2002-09-13 | 2013-04-23 | Irobot Corporation | Navigational control system for a robotic device |
US8463438B2 (en) | 2001-06-12 | 2013-06-11 | Irobot Corporation | Method and system for multi-mode coverage for an autonomous robot |
US8515578B2 (en) | 2002-09-13 | 2013-08-20 | Irobot Corporation | Navigational control system for a robotic device |
US8584305B2 (en) | 2005-12-02 | 2013-11-19 | Irobot Corporation | Modular robot |
US8594840B1 (en) | 2004-07-07 | 2013-11-26 | Irobot Corporation | Celestial navigation system for an autonomous robot |
US8600553B2 (en) | 2005-12-02 | 2013-12-03 | Irobot Corporation | Coverage robot mobility |
US8780342B2 (en) | 2004-03-29 | 2014-07-15 | Irobot Corporation | Methods and apparatus for position estimation using reflected light sources |
US8788092B2 (en) | 2000-01-24 | 2014-07-22 | Irobot Corporation | Obstacle following sensor scheme for a mobile robot |
US8800107B2 (en) | 2010-02-16 | 2014-08-12 | Irobot Corporation | Vacuum brush |
US8930023B2 (en) | 2009-11-06 | 2015-01-06 | Irobot Corporation | Localization by learning of wave-signal distributions |
US9008835B2 (en) | 2004-06-24 | 2015-04-14 | Irobot Corporation | Remote control scheduler and method for autonomous robotic device |
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US3229160A (en) * | 1962-01-31 | 1966-01-11 | Bendix Corp | Ignition system energized by either a.c. or d.c. source |
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US3325657A (en) * | 1964-07-29 | 1967-06-13 | Arrow Hart & Hegeman Electric | Cycling on-off electronic timing system |
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Cited By (137)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3772601A (en) * | 1972-09-11 | 1973-11-13 | Rca Corp | Dual channel balanced line type modulator |
US5561350A (en) * | 1988-11-15 | 1996-10-01 | Unison Industries | Ignition System for a turbine engine |
WO1994005909A1 (en) * | 1992-09-09 | 1994-03-17 | Unison Industries Limited Partnership | Free-running capacitive discharge ignition system with spark frequency control |
US5347422A (en) * | 1992-09-09 | 1994-09-13 | Unison Industries Limited Partnership | Apparatus and method for an ignition system |
US5852381A (en) * | 1994-03-09 | 1998-12-22 | Cooper Industries, Inc. | Turbine engine ignition exciter circuit including low voltage lockout control |
US7095181B2 (en) | 1995-07-14 | 2006-08-22 | Unsion Industries | Method and apparatus for controllably generating sparks in an ignition system or the like |
US5754011A (en) * | 1995-07-14 | 1998-05-19 | Unison Industries Limited Partnership | Method and apparatus for controllably generating sparks in an ignition system or the like |
US6034483A (en) * | 1995-07-14 | 2000-03-07 | Unison Industries, Inc. | Method for generating and controlling spark plume characteristics |
US6353293B1 (en) | 1995-07-14 | 2002-03-05 | Unison Industries | Method and apparatus for controllably generating sparks in an ignition system or the like |
US20020101188A1 (en) * | 1995-07-14 | 2002-08-01 | Unison Industries, Inc. | Method and apparatus for controllably generating sparks in an ingnition system or the like |
EP0789144A2 (en) * | 1996-02-09 | 1997-08-13 | Cooper Industries, Inc. | A turbine engine ignition exciter circuit incluiding low voltage lockout control |
EP0789144A3 (en) * | 1996-02-09 | 1998-08-26 | Cooper Industries, Inc. | A turbine engine ignition exciter circuit incluiding low voltage lockout control |
US8478442B2 (en) | 2000-01-24 | 2013-07-02 | Irobot Corporation | Obstacle following sensor scheme for a mobile robot |
US8565920B2 (en) | 2000-01-24 | 2013-10-22 | Irobot Corporation | Obstacle following sensor scheme for a mobile robot |
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US8412377B2 (en) | 2000-01-24 | 2013-04-02 | Irobot Corporation | Obstacle following sensor scheme for a mobile robot |
US9144361B2 (en) | 2000-04-04 | 2015-09-29 | Irobot Corporation | Debris sensor for cleaning apparatus |
US6771519B2 (en) | 2000-09-29 | 2004-08-03 | Unison Industries, Inc. | Method and apparatus for generating high voltage |
US6484707B1 (en) | 2000-09-29 | 2002-11-26 | Unison Industries, Inc. | Method and apparatus for generating a sustained arc at a sparking device |
US6661239B1 (en) * | 2001-01-02 | 2003-12-09 | Irobot Corporation | Capacitive sensor systems and methods with increased resolution and automatic calibration |
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US20110131741A1 (en) * | 2002-01-03 | 2011-06-09 | Jones Joseph L | Autonomous Floor-Cleaning Robot |
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US20110043961A1 (en) * | 2003-02-11 | 2011-02-24 | Nerheim Magne H | Systems and methods for immobilizing with change of impedance |
US7602598B2 (en) | 2003-02-11 | 2009-10-13 | Taser International, Inc. | Systems and methods for immobilizing using waveform shaping |
US7145762B2 (en) | 2003-02-11 | 2006-12-05 | Taser International, Inc. | Systems and methods for immobilizing using plural energy stores |
US20070109712A1 (en) * | 2003-02-11 | 2007-05-17 | Nerheim Magne H | Systems and Methods for Immobilizing Using Waveform Shaping |
US7936552B2 (en) | 2003-02-11 | 2011-05-03 | Taser International, Inc. | Systems and methods for immobilizing with change of impedance |
US20040156162A1 (en) * | 2003-02-11 | 2004-08-12 | Magne Nerheim | Dual operating mode electronic disabling device for generating a time-sequenced, shaped voltage output waveform |
US7782592B2 (en) | 2003-02-11 | 2010-08-24 | Taser International, Inc. | Dual operating mode electronic disabling device |
US20070133146A1 (en) * | 2003-02-11 | 2007-06-14 | Nerheim Magne H | Dual Operating Mode Electronic Disabling Device |
US20110096459A1 (en) * | 2003-10-07 | 2011-04-28 | Smith Patrick W | Systems And Methods For Immobilization Using Pulse Series |
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US20050276000A1 (en) * | 2004-06-15 | 2005-12-15 | Wilmot Theodore S | Solid state turbine engine ignition exciter having elevated temperature operational capabiltiy |
US7355300B2 (en) | 2004-06-15 | 2008-04-08 | Woodward Governor Company | Solid state turbine engine ignition exciter having elevated temperature operational capability |
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