US1034645A

US1034645A - Electrical ignition device.

Info

Publication number: US1034645A
Application number: US55154610A
Authority: US
Inventors: Henry Joseph Podlesak
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-03-25
Filing date: 1910-03-25
Publication date: 1912-08-06
Anticipated expiration: 1929-08-06

Description

H, J. PODLEKK.

ELEGTRIGAL IGNITION DEVICE.

APPLICATION FILED MAB.25, 1910.

1,034,645. Patented Aug. 6, 1912.

W/TN ESVSES INVENTOZD UNITED STATES PATENT omen HENRY aosnrn ronLEsAK, 0F cnrcaeo, ILLINOIS.

.ELEG'I'RICAL IGNITION DEVICE.

Specification of Letters Patent. Application filed March 25,

Patented Aug. 6, 1912. 1910. Y Serial No. 551,546.

To all whom "it may concern:

Be it known that I, HENRY J osnrn Poonasax, acitizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Electrical Ignition Devices,- of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to electrical ignition devices for explosive engines and the like, and has for its particular object to provide a simple, compact, and effective means for igniting the explosive charges in the cylinders of internal combustion motors.

Referring tot-he drawings: Figure 1 is a diagrammatic representation of an arrangement' for a single cylinder motor; Fig. 2

shows an arrangement for a four cylinder motor; Fig. 3 shows one modification of the circuit making and breaking device; Fig. 4 shows another arrangement for four cylinder motors.

Letter G represents a magneto generator, aving permanent .magnets M, and pole pieces L L, between which rotates, or oscillates, the armature core I, which carries generating windings W, all being of the usual arrangement in magneto generators, except that the windings should have comparatively high inductive capacity.

, Letter T represents a transformer, having primary windings P and secondary wind-, ings S, the two being in inductive relation to each other. The conductors 8 and 9 connect the secondary to the electrodes 0 and e I .of the spark plug, in which 9 is the sparke One termmal of the primary is connected to one terminal of the generating windings by conductor 3, the other terminal 'of the primary being connected to the other terminal of the generating windings'by conductor 2, through condenser C, and conductor 1,.the condenser being in, series with the two conductors. The circuit is W1 C 2-P3W. Conductor 5 connects conductor l t0'0ne terminal of a circuit making and breaking device, the other terminal of which is connected to conductor 3 by conductor 4.

In the circuit making and breaking device, 7c is a cam which is suitably journaled and driven in synchronism with the armature shaft; the cam has suitable cam surfaces on its periphery to vibrate the pivoted arm 6, through means of a roller carried by b and riding on the cam surfaces; the arm 6 1s pivoted at h and carries a contact point 0, which is adapted to make contact alternately with contact points at and n which are carriedby frame f; m and n are'not insulated from each other. The spring 2 serves to keep the roller in contact with cam surfaces.

As shown in Fig. l, the roller of arm 6 has just entered a depression in the cam surface, thus allowing thearm b to move to the left until the contact'point c has made contact with a; just below the roller the cam surface is shown raised, the raised portion being at such distance, or radius, from the center of the cam journal that the arm 6 will be moved to the right, when this raised portion of the cam moves under the roller, to such extent that the contact point 0 will contact on m. The remainder of the cam surface may be at such radius that the arm I) is moved into, and maintained at, such position that the contact 0 stands midway between at and 12, out of contact. This would be desirable when batteries are used as source ofcurrent, to prevent unnecessary drain on the batteries.

The operation of the whole apparatus is, referring first to Fig. 1, as follows: Electrical pressure is generated in the armature windings when the armature is rotated; at a proper period, the cam 70, which is rotated simultaneously with the armature, (and in synchronism with the armature in the ease the generator'generates alternating current of comparatively low frequency, which would be the case in the type of generator shown), causes the arm I) to move so that 0 makes contact with one of the contact points, say n, then to break the-contact and immediately make contact with the other contact point m, assuming the cam to revolve counter clockwise. Now, as soon as the con: tact has been made on n, a heavy flow of current will be established through, or in, the generating windings, the circuit being W- -15bf 4-3-W; since the generating windings possess inductance, energy will be stored in them; then, as the circuit is broken at 12, an inductive impulse of comparatively high potential will discharge from the windings through the primary P into the coudenser C, which will become highly charged, and again discharged, through the primary 1 P and the circuit making and breaking de-' vice, immediatelythe arm 72 makes contact on m. Thus, there is a heavy flow-of cur- .rent rapidly established through-the primary winding of the transformer just after the contact is broken at n, the condensance of C being made of suitable capacity with respect etc the inductance of P so that there is no lag in the current flow; this heavy flow of current through primary P induces high electrical pressure in the secondary S from the terminals of which conductors are led to the spark plug terminals, 6 and e, the electrical pressure being high enough to cause current to jump across theair gap g, which, in,practice, is inside the motors'cylinder, where the are, established across the air gap, will ignite the explosive charges therein.- Coming now to the action that takes place when contact is made at the contact point m, it will be readily understood that as soon as contact is made at :m, which will be immediately after contact is broken at 'n,-the condenserfwhich has just been highly charged, will discharge through the circu t making and breaking device and the primary," (the circuit being C-2-P-3--4.fb -51 O'), inducing further electrical effects in the secondary 'S of nearly the same magni- 30 tude as those induced by the discharge from the generating windings. Thus, high electrical pressure, suflicientto cause'current to. jump across the air'gap of a spark plug is induced in the secondary winding, 'ffirst, when the contact is broken at a, and again when contact is made at m. Either of these electrical effects, the one'produced on break-' ing contact, or the .one produced on making contact, is amply sufiic ent, when a suitable or other source of current is used, to effectwely ignite the explosive charges in;

Hence, one'of the stationary contact points may be left of generator, 4

internal combustion motors.

as is's hown in Fi 4, and the electrical effect produced 'on' breaking contact alone used for the ignition of the explosive charges. However, I prefer to use the two stationary contact" points scheme, or equivalent action, since it appearsto give somewhat better results at low speeds of the armature.

It will be observed that, whenever thearm b of the circuit making and breaking device 3 makes contact on one of the stationary con-' tact points, two complete circuits are made, namely, circuit W-1-5b-f-4-3'-W, on the left side of said device, and circuit, G2-P-3-4-f-b-5-1--C, on the other or right side "ofthe device. Gurrent may flow in time if there be difference of potential at the terminals of I'the generating windings and of the condenser. The condenser is,.of. course, chargedjto the potential existing in the generating windings just before the contact is made by b, and

discharges as soon as \the .contact is made, the current flowing through the primary in such direction as to magnetize, to a slight extent,-the magnetic field of the primary in the reverse direction the inductive dischargeto that produced by a from the generating wlndings; there thus a greater flux variation produced an the primary of thetransmagnetic field of the I former than would be by the inductive dischar e alone, and hence also greater electrica The distributer blade use such, at slow speeds,

utilized for producing 1n the secondary of the transformer.

both circuits at the same winding.

The arrangementshown in Fig. 2 differs from that shown in Fig. 1 ;.only inthat it is adapted. for a four cylinder motor. The cam It has four lobes so as to produce four movements of the arm I) for each revo: lution, one movement for each cylinder F revolves at'the same speed as the cam, preferably onthe sameshaft. with the cam;' it makes contact, at proper periods, with any one of the se'g, ments 8, thus connecting the secondary circuit with the spark plug of that c linder which is in period for ignition. or the effects are produced-in the secondary type of the generator shown, the cam and the distributer are torun at half speed of the armature for" four cycle motors. Fig; 3- shows a modified form of circuit making and breaking device in which only one stationary contact point is used. The action is the'same as in Figs. 1 and 2, since the contact is maintained when the roller is .on the high portions} of the cam and broken only for an instant/as the roller rides into the depression on the cam surface. 7 Fig.4 shows a modification of the .ar-v ran ement in which fourt-ransformers are one foreach cylinder and preferably placed on ormear the cylinder; in this arrangement, the distributer is placed in the primary circuit and it switches. the pri-' mary current to the transformer operating the cylinder that is in proper period for ignition; ,The action of the circuit making and breaking device shown in'Fig: 4 is that the inductive discharge of the generating windings alone is the electrical effects The heavy flow of *current in the generating windings is established when the roller ofarm brides into the depressions in the cam k,the circuit being then made on m, and broken as soon as the roller rides onto the high portion of the cam. L

The circ'uit making and breaking device of. Fig. 2 may be used in thearrangement of Fig. 4, and vice versa. Also, the circuit making andbreaking device and the distributer may be combined into one, by providing four contact arms I) and four stationary contact points, .both, the arms and points, properly spaced around the cam,

45 .winding and acircu'it make and break de- -vice for first closing the sire to secure by-Letters-Patent is winding and including a sparking device, a

used eluded of a condenser, a

' shunt.

to the primary winding.

which would, in this case, depression, ternately. r While I have shown a generator as source ti current, itis obvious that batteries may be substituted, though, when batteries are a coi-l having inductance must be in inth'e'battery circnit, that is, be-' tween the battery and the circuit 'making and breaking device. v

'WhatrI' claim as my invention, and de- '4, In an ignition system, the combination of a supply circuit including inductance, a condenser and'a primary winding in series in the circuit, a secondary circuit. including a sparking device, a shunt around the condenser and winding, and a make and break device in the shunt, and a device consisting connected with one side of the have only one to operate the various arms al- In an and discharging of the condenser for each ignition period of the engine.

In an ignition system,

ignition system, the combination primary winding connected in series relation with the condenser and adapted tobe energized bya high impulse charging the condenser, a secondary circuit inductively related to'the of a for producing upon the opening of the circuit, a high potential impulse, a condenser for receiving such impulse, -a primary Winding in series relation with and traversed by the impulse during the'charging of the con denser, a i secondary circuit including a sparking device, a shunt around the condenser and winding, and a make and break timing device for first closing the circuit and instantly opening the same toproduce the impulse to charge. the condenserthrough the Windin and again closing and opening the circuit to disch through; the Winding for producing two sparks at each ignition period of the engine.

In an ignition system, the combination of a magneto, a condenser and a primary supply circuit connected with the condenser and winding and including inductance to pro duce the high potential impulse -for. ch aging the condens closing and opening succession the circuit through the 2. In an ignitionvsystem, the'combination- 01' a supply circuit of alternating current including inductance, means for momenta rily closing the circuit as the electromotive its an impulse due to the inductance, a conimpulse, a primary Winding traversed in series relation ands-e11 ergized by the condenser charging impulse, and a secondary circuitinductively related Ii-ary Winding and armature, a make. and break device'm the shunt and including a movable contact *element, and an actuator for, moving the element in timed relation to the armature to effect in quick succession the closing of the circuit as the'arinature 3. In an ignition system, the combinaition attains an approximate position :of maxiof a supp y circuit including inductance, a condenser and a primary winding' n series n the circuit, a shunt across the "circuit in of the circuit to obtain a high potential parallel relation to a the condenser and impulse through the winding in charging the condenser.

tance and then penmg i HENRY JOSEPH PoDLESAK. a high potential impulse-through the wind- Wit mg and condenser due solely to the induc- C, L B

tance' for energizing the winding. S5

the combination supply circuit containing inductance arge the condenser.

winding inseries with the winding ofthe magneto armature, a shunt around the pri- 'mum electro-motive force and the opening- In testimony whereof I aflix my signature 1n the presence of two subscribing'witnesses,