US995490A - Ignition system for internal-combustion engines. - Google Patents

Description

C. L. SILVA. IGNITION SYSTEM POE INTERNAL OBUSTIN ENGINES. APPLICATION FILED Emis, i910.

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HALF ONE-HUNBREDTHS 310 PERCY DREDTHS TC E. CON, JHN AQGILLNS, CLAR NELSN, 1\l'. H. HARGRAVE, 17V. V.

OFARRELL, D. GARR, T?. Wlhl, A. G. NAL-RER, 1i.

1LT. BRCKEET, El? 19.-'5. EBOUGH, ALL OF SAN MAmsoN, v. n. meurtriers, :einem caiirronnrs.

n Kennisnet, s.

G-NXTION SYSTTv' FOR NTERTL-CGMBUSTEON ENGINES.

'aterited inne 2i?, ELS-Eri,

Appieatiori tiled February. ib. Serial No. 545 269.

To all 'whom it mayc'oacem:

Be it lin-own that l, CLAUDE San Diego, in the county of San Diego itat-'Le of California, have invented certa..i

'Wland .useful improvements in ignition 'Systems for lnternahCombustion of which the followingl is a speciiicationl My present inventionrelat'es generally tc lignition systems for internal combustion engines and particularly to that character of system shown and described in my co pend ing applications, and embodying twin con# densers, alternate ones ot which charge and 4discharge upon the make or each circuit through an igniting coil.

The object of my present invention is to provide an apparatus of the above character which may be installed in connection with the sparking coils now in use Without splity 'ting their bus bar, and with this in mind sents a battery supplying a constant current vof uniform potential through conductors 11 my invention resides in the features to be hereinafter described With reference to the accompanying drawing, forming a part ot this speciication, and in which,

Figure 1 is a diagram' of my improved apparatus as applied to a two-cylinder engine, and, Fig. 2 is the same as applied to a fourbylinder engine.

Referring now to these gures, 10 repreand 12 which are bridged by condensers 13 and 14, connected in series by a Wire 15 from Whicha conductor 16 leads to the bus bar 17.

Thus, initially, the potential in each ofthe condensers is equal to 'One-halt thatbt the current supply means, or battery 10, which latter may, of course,'be a generator tobe driven Without definite relation to the en- The conductors 11 and 12 lead current through the 'bus bar 17 to the primaries 18 of the sparking coils which induce into their respective secondaries '19- and raise the poJ tential sufficient to cause a spark to jump the gap in their respective spark plugs-21. From the'primaries 18, conductors 22 lead to the corresponding outer segmentsv 23, 2e, and 26 of the timer .27 Which has corresponding inner segments 28, 29, 30 and 31 and a brush segments 39. adapted to bridge each pair cinner and outerseements when it contacts therewith. Conductors and 34 lead from" conductors 11 and 12 to the inner segments and 3l .spectively, 'which connected by Wires and 3S to ther ei l opposite inner and 29 respec i 'ush rotates to the posin senients Q13 and let in cirL .es the tion shown t thus placin Wih the bat-toy f. i-Qhis circuit raced follows: from one pole et battery 1G by conductors 1i and to t, nient Q8., through timer brush 32 to segment 23, by conductor 22 through coil 18, thence through bus bar 1'? and conductor 16 to condenser 14, and thence by conductors 1Q and to the other pole ct the battery. The condenser le tl'ieretore receives a charge equal to that oli the battery potential. 'As the timer brush 3Q continues tov rotate it bridges the segments 29 and 24%.. Ilhis completes the circuit ot' the condenser through the induction coil 18, causing the condenser to discharge into the coil. The circuit may be traced as follows: from the condenser 14 over conductor 1G, bus bar 17, through coil 18, conductor 22, segment Q4, timer brush 32, segment 29, and conductors Se and 12 to condenser 14%. As the .potential of the condenser 14 fails, due tothe last mentioned circuit, it causes, by induction, a current of sufficient potential to jump the gap in the plug "21. "At such a time thereafter condenser 18 receives a charge from the battery 10 by the following circuit: from one pole of battery 1() 'by conductor Se to lsegment 29, through timer brush 32 to segment 24, conL ductor 2Q, coil. 18, bus bar 17, conductor-16, vcondenser 19, and5-by conductor 11 to the other pole ot the'battery. This places the condenser 13 in circuit With the battery, and it receives a charge equai to that of the battery' potential. A s the timer brush 32 continues to rotate, again4 comes in contact with the segments Q3 and 28, causing the condenser 1S to discharge into the coil 18, and ,the condenser 1li to receive a charge from the battery 10 through the tollen/'ing circuits: 'The current lot-rs 'from condenser 13 over conductors 33 segment ine 28, through timer brush 32 to segment Q3, through conductor 22 to coil 18, through bus bar 17, and through conductor 16 back to the condenser 13. This circuit causes the potential of the condenser 18 to rapidly fall to zero, inducing a current in the secondary or" the coil 18, which produces a sparlr in the plug 2l.' At such a time thereattei` condenser 14 receives a discharge from the battery l0, the circuit being the same as the one irst described. This raises the potential of the condenser 14 to that of the battery and completes the cycle. From this it will be seen that onecondenser discharges its energy and the other charges, through the primary ot' a coil, upon the make of each circuit, with attendant advantages, for instance, demagnetizing the core 20 of the respective co'il following induction, and .obviating all arching incident to discharging upon the break. It will further be seen that this action takes place Without splitting the bus bar and without mechanical devices depending upon proper adjustmentfor successful operation.

A dual or alternative system may be created by supplying a battery 37 to be'cut into the conductor 16 by means of a mechanical switch 38, and with this arrangement, the system operates through the usual vibrators. lVith battery 3T cut out however, and the condensers operating, the discharge is so rapid that the vibrator has not time to oscillate, the advantage being that there is eliminated the time constant that every vibrator has, permitting synchronous sparking with relation to the position of the pistorsl of multicylinder engines.

claim:-

l. In an electric ignition system, twin condensers connected in series, a charging circuit to which the :tree terminals of the condensers are connected, ignition coils having their primaries connected, respectively,

seance to opposite sides of the charging circuit, and each of said primaries being also connected to the neutral point of the condensers, and a timer in the circuits of the primaries, said timer being located between the primaries and their connections with the. aforesaid charging circuit, for alternately closing the primary circuits.

2. In an electric ignition system, twin condensers connected in series, a charging circuit for said condcnsers, a conductor having a connection intermedate said condensers, ignition coilsV having one of their ends connected to said intermediate conductor, and a timer comprising contacts arranged in pairs, one of the members of each of said pairs beiuff connected respectively to the other ends the aforesaid ignition coils, and the other members of each of said pairs being connected respectively to opposite sides of the charging circuit, and a movable member successively bridging the members of the respective pairs of contacts.

3. ln an electric ignition system, a `source oi' electrical energy, conductors leading therefrom, twin condensers connected in series and bridging saidconductors, a conductor having a connection intermediate said condensers, a timer having a pair of contacts for each of the ignit-ing devices, and a brush to successively bridge each pair of contacts, ignition coils, each having connection with the aforesaid intermediate conductor, and each having a. conductor connectingl with one of its respective contacts, and conductors from the source of electrical energy to the other contacts. f

in testimony whereof I aii'ix myts'ignature in presence ot' two witnesses.

CLAUDE L. siLva.

iVitnesses:

F. A. Bannon, E. F. CAMP.

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