US1167483A - Ignition system. - Google Patents

Description

B. DECK.

IGNITION SYS'I'EFI.'

mjPucAnoN FILED Avn. i3.. 1914.

fia/@ Paiem lm., H, 11916.

aan sans anni anion.

BURNS DICK, OF ST. LOUIS, MISSOURI, =ASSIG'NOR TO WAQNER ELECTRIC lVIANUFAC- v TUBING- COMPANY, OF ST. LOUIS, MISSOURI, A CQILPORATION OF MISSOURI.

IGNITION SYSTEM.

AppIcatonled April 13, 1914. Serial No. 831,445.

new and useful Ignition System, of which the following is such a full, clear, and exact description as will enable any one skilled 1n the .art to which it appertains to make and use the same, reference being had to the accompanyingdrawings, forming part of this specification.

' generator can be connected to the other ter- My invention relates to an ignition system suitable for internal combustion engines.

One of my objects is to produce at will either a single spark or .vibrator sparks, while reducing the minimum necessary ad- Vance of the single spark over the irst vi- D brator spark to a very small angle.

Other advantages of my invention will appear from the detailed description .and will be pointed out in the appended clalms. My invention is particularly applicable to iin ignition system adapted to be operated rom a storage battery or from a generator driven from the engine and designed to charge said battery after a certain engine speed has been exceeded. It is usual to provide an automatic battery switch between a storage battery and the dynamo adapted to charge same. In one form of my system, I make use of this automatic battery switch to change from vibrator to single sparks or vice versa.

Referringto the accompanying drawing, which illustrates one embodiment of my invention, the storage battery 7 is permanently connected to one of the main brushes 10 of the-generator 9 driven by the explosion engine. The other main brush 13 of this minal of the storage battery by means of the automatic battery switch. The exciting winding 12 of the generator is connected between the main brush 10 and an auxiliary brush 1l displaced from the main brushes.

rlhe automatic battery switch comprises a' movable armature 17 pivoted at 18, and normally under the control of spring 19, but is also under the influence of a magnet 14 energized by the shunt coil 15 connected across the main brushes of the dynamo, and

a series coil 16 .connected between the stationary contact 23 of the automatic switch and the main brush 1B of the dynamo. The

armature 17 of this switchV carries two conxtacts 21, 22. The contact 21 rests on the stationary contact 2() as long as the spring 19 is in control of the armature 17. The contact 22 rests on the stationary contact 23 when the electromagnet of the automatic battery switch overpowers the spring 19 and attracts the armature 17.

The secondary ignition circuit comprises the secondary winding 4 of the spark coil and one or more spark gaps such as 5, 6. A. distributer of known construction is usually interposed between the spark gaps and the primary spark coil, but is not illustrated in A thev figure since it does not form a part of this invention. The spark coil is provided with a core 2. Y

The primary ignition circuit has two branches; one adapted to produce vibrator sparks and comprising the storage battery 7, the primary 3 of the spark coil, the movable arm 40 of the circuit breaker pivoted at 41, the cam 39 coperating therewith mechanically and electrically, and the vibrator 34. The cam 39 is either geared to the engine shaft or directly connected thereto. 1 This Patented J an. 11, 1916.

vibrator circuitis closed when the automatic battery switch is open. The other branch comprises the storage battery, the primary of the spark coil, the circuit breaker contacts 42, 43, and is closed when.. the automatic battery switch is closed. This single spark circuit can also be energized directly fron'the generator 9, for the latter is permanently in circuit with the primary of the spark coil and the circuit breaker contacts 42, 43.

The ignition switch 31 has three positions. In the position 47 shown in the ligure, it connects the storage battery 7 to the vibrator circuit and closes the single spark circuit at the points 26, 27. In its position 48, it interrupts the single spark circuit and also dislll@ 39 are at rest and in the position shown, then the spring 19 will be in control of the armature 1T of the automatic battery switch and the vibrator circuit may be traced from the negative pole of the battery through the spark coil to the breaker arm 40, to the cam 39 and the stationary contact 37 of the vibrator, the contact 3G attached to the spring-mounted armature 34 thereoit pivoted at 35, through the energizing coil 33 of said vibrator, the contacts 25, and 24 of the ignition switch, the stationary contact 20 coperating with the contact 21 of the automatic battery switch, and through the armature of the latter back to the positive pole of the storage battery. As long as the cam 39 is in electrical contact with the breaker arm 40, the vibrator will be in operation, and vibrator sparks will be produced between points 5 and 6. During the whole of this period, the single spark circuit will be interrupted at the points 42 and 43. It' the engine has come to rest in a position in which the cam 39 does not eng'age the breaker arm 40, then the spring 45 will be in control of said arm, the Vibrator circuit will be interrupted because 39 has i broken connection with 40, and the single spark circuit will be closed through the point 2G, contact 29, point 27, the generator 9, and the primary 3 of the spark coil.

The mode of operation of this system is somewhat as follows: When it is desired to start the explosion engine, it is first necessary to place the ignition switch 31 into its position 157, when an attempt may be made to start the engine on compression by depressing the switch 4G, thus closing the vibrator circuit independently of the cam 39 Should this fail to start the engine, then the operator may crank same, either by hand or mechanically, thus causing the cam o9 to revolve, as indicated in the ligure.

As soon as this cam strikes the circuit breaker arm 40, the single spark circuit is interrupted at the points 42, 43, and the vibrator circuit is simultaneously energized. This circuit is, oi' course, closed at the points 2.1, 20, because as long as the engine is standing still or is revolving very slowly, the spring 19 is in control of the automatic battery switch armature 17. As soon as the engine has lired, its speed lmay be increased in a manner well understood, and, when it reaches a value at which the generator picks up,7 the interruption of the single spark circuit at the points 42,"43 will begin to produce single sparks, the magnitude of which will depend on the magnitude of the E. M. F. generated in the dynamo 9. At the saine time, the shunt winding 15 of the automaticfbattery switch will also become energized'. When the dynamo reaches a voltage which is approximately equal to the storage battery voltage,

dynamo 9 has reached the same value as the voltage of the battery T. When the generator is connected in parallel to the battery through the battery switch, it not only sup plies the energy for the single spark circuit, but also sends a charging current into the battery. Under these circumstances, no vibrator sparks are produced. Should the engine speed fall below a certain value and reduce the voltage generated in the dynamo to a value below that of the battery '7, then the latter will send a discharging current into the generator. This discharging current, circulating through the winding 16, will produce a magnetization opposed to that of the winding 15,' will weaken the electromagnet, and will allow the spring 19 to resume control, thus restablishing the production of vibrator sparks. These vibrator sparks will be preceded by a more or less energetic single spark, as long as the generator 9 produces any voltage at all.

The condenser 44 is connected across the single spark contacts 42, 43, and the condenser 38 is connected across the vibrator contacts 36, 37, in orderto minimize sparking at said contacts and increase the elicienry of the spark coil. T he fuse 50 is inserted in the single spark circuit for the purpose of pr otectiug the same in case the automatic battery switch fails to connect the generator to the batter,v after the Jformer has reached the proper voltage. Should the automatic switch lfail to perform this duty, then the voltage of the generator will increase ta r beyond its normal value and may, thereby, damage the spark coil. lThe fuse 50 will prevent such an accident. It will be seen that the cam 39 contacting with the circuit breaker arm 40, performs the duty ot a timer for the Vibrator circuit. It is obvious that the functions ot cam and timer need not be combined. lt' it is preferred not to do so, then the stationary contacJ 3T of the vibrator should be connected to point 41 oil:l the primary ignition circuit through a timer ot' ordinary constructimi. when the cam 39 may be grounded in the usual manner and caused to strike an insulated portion of the circuit breaker arm, say a Fiber block located therein.

Having -fully described my invention, what l claim as new and desire to secure by Letterslatcnt ot' vthe United States is:

1. In an ignition system for internal combustion engines. a secondary ignition circuil, an exciting coil ior energizing said secondary circuit, means comprising cooperating making and breaking the circuit through the exciting coil comprising a vibratile element,

and means connecting said last named circuit interrupting' means in circuit with the exciting coil approximately coincident with lthe separation of the contacts` of the first mentioned circuit interrupting means.

2. In an ignition system for internal combustion engines, a secondary ignition circuit, an exciting coil for energizing said secondary circuit, a mechanically operated circuit breaker for the exciting coil, a Vibratile circuit breaker, and means vfor connecting the vibratile circuit breaker incircuit with the exciting coil at the time the contacts of the mechanical circuit breakerare separated.

3. In an ignition system for internal combustion engines, a secondary ignition circuit, an exciting coil for energizing said secondary circuit, a battery, a dynamo electric niachine, tWo circuit breakers for the exciting coil, and means adapted to render one circuit breaker inoperative and to connect the dynamo in circuit with the battery.

4. In an ignition system for internal combustion engines, a secondary ignition circuit, an exciting coil for energizing said secondary circuit, a battery, a dynamo electric machine, two circuit breakers, a switch adapted to disconnect one circuit breaker from the exciting coil andto connect the dynamo. in circuit with the battery, and means governed by the voltage ot the ldynamo forfoperating said switch.

5. In an ignition system Jfor internal combustion engines, a secondary ignition circuit, an exciting coil for energizing said secondary circuit, a circuit breaker for the ex-A citing coil coinprising,coperating contacts, a vibratile circuit breaker, and a cam actuated by the engine and adapted to separate the contactsotl the first mentioned circuit breaker and connect the vibratile circuit breaker in circuit With the exciting coil.

. 6. In an ignition system tor internal conibustion engines, a secondary ignition circuit,

an exciting coil for energizing said secondary circuit, a circuit breaker for the exciting coil comprising coperating contacts,

.a vibratile circuit breaker, and a cam actuated by the engine and adapted to simultaneously separate the contacts of the first mentioned circuit breaker and connect the vibratile circuit breaker in circuit With the exciting coil.

7. In an ignition system for internal combustion engines, a secondary ignition circuit,

f an exciting coil for energizing said secondary circuit, a mechanically operated circuit breaker for the exciting coil, a vibratile circuit breaker, means for connecting the vibratile circuit breaker in circuit with the exciting coil, and a dynamo driven by the engine and permanently connected in series with the exciting coil through the mechanically operated circuit breaker.

8. In an ignition system for combustion engines, a secondary ignition circuit, an exciting coil or energizing said secondary circuit` a battery, a mechanically operated circuit breaker and a vibratile circuit breaker for the exciting coil, a dynamo connected in series with the exciting coil through the mechanicallyoperated circuit breaker, and means for connecting the battery in circuit With the exciting coil through the vibratile circuit breaker, said means comprising a switch adapted to disconnect the battery from the vibratile 'circuit breaker and to connect the battery in circuit with the dynamo.

9. In an ignition system for combustion engines, a secondary ignition circuit, an exciting coil for energizing said secondary circuit, a battery, a mechanically operated circuit breaker and a vibratilelcircuit breaker for the exciting coil, a dynamo connected in series with the exciting coil through the mechanically operated circuit breaker, means for connecting the battery in circuit With the excitingcoil through the vibratile circuit breaker, said means comprising a switch adapted to disconnect the battery from the vibratile circuit breaker and toconnect the battery in circuit with the dynamo, and means governed by the 'voltage of the dynamo for operating said switch.

In testimony whereof, I have hereunto set my hand and affixed my seal in the .presence of the two subscribing Witnesses.

BURNS DICK. [L s] Witnesses:

E. M. JOHNSTON,

C. B. BENNETT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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