US1225533A - Ignition system and apparatus. - Google Patents

Description

R. VARLEY.

IGNITION SYSTEM AND APPARATUS.

APPLICATION FILED SEPT. ll. I914- 1,225,533. Patented May 8,1917.

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R. VARLEY. IGNIHON SYSTEM AND APPARATUS. APPLICATION FILED SEPT. 11. 1914.

1 ,225 ,533 Patented May 8,1917.

5 SHEETS-SHEET 2- INVENTOR n. VARLEY. lGNlTlON SYSTEM AND APPARATUS.

APPLICATION FILED SEPL 11, 1914.

Patented May 8,1917.

5 SHEETS-SHEET 3 m mvargon R- VARLEY.

IGNITHJN SYSTEM AND APPARATUS.

- APPLICATION FILED SEPTJI. I914. 1,225,533.

Patented May 8, 1917.

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IGNITION SYSTEM AND APPARATUS.

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1,225,533.v originalcapplic ation filed August 29, 1914, Serial No. 859,160. Divided and 11,1914. Serial No. 861,230.

. from contactual UNITED STATES PATENT OFFICE.

RICHARD VARLEY, OF ENGLEWOOD, NEW JERSEY.

IGNITION SYSTEM AND APPARATUS.

To all whom it may concern:

' Be it known that I, RICHARD VARLEY, a citizen of the United States of America, residing at Englewood, in the county of Bergenand State of New Jersey, have invented new and useful Improvements in Ignition Systems and Apparatus, of which the following is a full, clear, and exact description, 'referencebeing had to the accompanying drawings, which form part of this specification.

This invention relates to electrical systems, more particularly means for exploding the combustible mixture in. the cylinders of an engine.

The general object of this invention is lo provide a new and improved form of ignition system and apparatus which shall be effectively responsive to the requirements of the modern internal combustion engine of the equipment of tainment of this end and other advantages, hereinafter apparent, are afforded by the provision of a system and apparatus eniploying interrupter or timer mechanism, the contact elements of which are relievedactivity by occupying a non-o1 erative position, during non-use of the ignition circuit of which said mecha-. nism is an element and when the spark plugs are energized by another ignition cii cuit, as that of a magneto generator.

' The present application comprises a division of my application for Letters Patent filed August 29, 1914, Serial No. 859,160.

The above mentioned and other adv'an tages will more fully appear in the following description of my invention, which I will now make in connection with the ac- (EOIIlPtlIlYlllg drawings, so that others skilled in the art to which it appertains may understand and construct the same, it being premised, however, that many changes may be made in the various structures shown and circuit airrangeiruints therein largely diagram'maticall v illustrated, without departing from my invention.

Figure 1 is a diagrammatic view of an ignition system and apparatus embodying my invention; Fig. 2 is a similarview, showing modified form of timer mechanism and a vibrator spark coil; Fig. 3 is a diagrammatic' view corresponding generally to the arrangement shown in Fig. ,1 but showing means for connecting the high tension Specification of Letters Patent.

to the provision of autovehicles. The at Patented May s, 1917.

winding of a spark coil or of a magneto generator to common distributer mechanism; Fig. 4 is a plan view showing inter-' rupter mechanism diagrammatically indicated in F ig. 1; Fig. 5 is an elevational view, partly broken away, of the same; Fig. 6 is a transverse sectional view'on the line (36 of Fig. 5; Fig. 7 is a similar sectional view on the line 7-7 of Fig. 5; Fig. 8 is aplan view of timer mechanism diagranr matically illustrated in- Fig. 2; and Fig. 9 is a plan view of interrupter or timer mecha nism diag 'ammatically illustrated in Fig. 3. Referring to Fig. 1 of the drawings, I have shown my invention in connection with an electric generator 2 adapted to supply current to a light or work circuit 3 and to chargea battery (accumulator) 4/ This generator hasseries and shunt field windings 5 and 6 respectively, that are connected to oppose each other. The numeral 7 indicates the core of a magnetic cut out or relay, having winding in circuit with shunt field winding of the generator and consisting, preferably. of a fine wire coil 8 and a heavy series coil 9 which have a common terminal contact connection at 10, with which contact is adapted to co-act a con tact member 11 carried by and electrically connected to a pi'votally mounted armature 12 connected in the battery circuit. Connected to the armature 12 'is a suitable spring 13 which operates to separate the contacts 10 and 11 at low engine speeds.

The spark coil or transformer of a continuous or battery ignition circuit, as COIlt-I'a distinguished from a magneto or alternating current circuit, is indicated at 11 and comprises a usual secondary winding 16 which connects with a revoluble arm 17 of suitable distributer mechanism 18 the symmetrically disposed segments or contacts 19 of which connect with spark plugs of the engine (not shown), in the usual manner, as by leads 20.

One end of the with the battery while the other e'ndis connected to a core 21 of an electromagnet 22, having energizing winding22. Said magnet in this particular instance is mounted in and its core insulated from the casing or housing 23 of circuit interrupter or timer mechanism (clearly shown in Fig. 1.) com prising essentially a 'lixed contact 21, a rela* tively yieldable contact 'or movable lever 25 this application filed September and contact actuating means. Connected across'said contacts is a usual condenser 25*. The contact 24 and lever 25, normally in contactual union, are carried by an insulated mounting 26 pivoted in the casing 23, as at 27, and the contact 24 is mounted on an extension of or electrically connected to an arm 28 of the pivotal member 26, while the contact lever 25 is grounded, as at 29. The

arm 28 constitutes an armaturefor the magnet 22, attraction by which of the arm, pivotally moves the member 26 to such position as to present the contact lever to an actuating cam 30 (properly synchronously driven by the engine through suitable gear. connection, not shown), against the action of a spring 31 which serves upon and during demagnetization of the magnet 22,

i to return and normally lioldtl earmature . blades 36, 3 38, 39 and 40 grouped about 24 and 25 by the action of the cam 30 on the latter yieldable contact or lever 25, for the production of a-high potential sparking current in the secondary winding of the spark coil, as is understood.

By means of switch mechanism 34, control of the battery ignition circuit is eifected and also, as hereinafter set forth, the control of certain more or less interdependently related elements of the equipment of an autovehicle. .This switch mechanism v34 which may be mounted at any convenient lace on the vehicle, comprises an insulated ase or su port 35 that carries contact a pivotal switch block 41 carrying contact rs-42, 43 and 44, grounded, as at 45, an insulated bridging contact blades 46 and 47. The pivotal switch member 41 is provided with a suitable manipulating handle 48. The movable contacts 42 and 43 are ada ted to co-act with contact finger or blade 4 for grounding a magneto generator 49 of the equipment when it is desired to cut out that'elenient, as hereinafter set forth. The'mova'ble contact member'44 is adapted, by engagement with the contact 36, to connect the windin of the interrupter magnet 22 in grounde circuit with the'battery,

' while contact 46'when'shifted to bridge the contacts 36 and3i'.,also' connects, as hereinafter more. fully described, the magnetwinding 22 withv the battery and 'in circuit with winding .9 of the generator relay or cut out above described:- Bridging of; contacts 38 and 39 by the contact mem r 47 brings the battery into energizing connection with engine starting mechanism or controlling apparatusfor such starting mechanism (not shown), as by lead 50.

When it is desired to start the engine the switch arm 48 is shifted to move switch body or block 41 against-the tension of a spring 51, to a position where contact 47 will bridge or connect contacts 38 and 39. This osition for the arm 48, is indicated by a on the index )late of the switch, structure shown in t 1e drawing. Bridging of the contacts 38 and 39 connects in battery circuit, and sets up operation of, the engine starting apparatus, or its controhfor turning over or initial driving of the engine. Movement of the switch to S or engine starting position, brings contact 44 into engagement with the contact 36 of the switch with the result that the winding 22 of the interrupter magnet 22 is connected in the battery circuit,resulting in attractive pull of the armature 28 into contact with the .niagnct core 21, shifting of the interrupter contact lever 25 into operative juxtaposition to the actuating cam 30, and the establishment of a battery primary ignition circuit for utilization during starting of the engine.

Upon picking up or assumption of selfpropulsion of the engine, the switch arm 48 is released and the sring 51 returns the switch member 41 to M1 or magneto position, breaking the connection between contacts 39 and 47 and causingvcontact 44 to pass from contact finger 36. It will be assumed that the interrupter or timer casing 23 has been so shifted as to obtain the usual desirable spark retard during starting'of the engine, and that generative driving of the generator 2 by the engine, causesenergizing of the coils 8 and 9 of the aforesaid magnetic cut out or relay and resultant attraction of the relay armature 12 in such manner as to effect engagement of the relay contacts 10 and 11. By the provision of switch means, as hereinafter fully set forth, occupation of the interrupter of spark retard osition brings or maintains, as through lea s 36', 37- and 37" and coil 9 of the magnetic cut out or relay, the magnet winding 22 in closed circuit with the battery, so that when switch contact 44 passes from contact finger 36 in the breaking of engine startin connection, in the manner above set fort the interrupter or timer mechanism of the battery or continuous current ignition circuit remains operative. It therefore will be seen that initial driving of the engine may be made on battery ignition and until such time as the magneto generator delivers efl'ective sparking current. When it is desired to discontinue use of the magneto generator 49, the switch arm 48 may be shifted to a position to bring the contact finger 42 into engagement with the contact blade 40 or to ofi'- position with resultant short circuiting grounding of the magneto. d

Shifting of the switch arm 48 so as to cause bridging of the contacts 36 and.37 by the contact 46 or to MB of magnetobattery position, moves the contact finger 42 from the contact 40, restoring the magneto to operative condition by ungrounding thereof, and connects the interrupter magnet 22 into energizing relationship with the battery, which, it will be assumed, is now in circuit with the active lighting generator and'tie coil 9 of the battery or generator cut-out or relay. In this condition both the magneto and the battery ignition circuit are operative,- so that the battery or continuous current ignition circuit operates in supplementary capacity. Thus if the magneto current grows 'inefiicient, as hereafter stated,

, or for any other reason, the battery or con gine, and for many 'or terminals 36 tinuous current ignition circuit will continue to supply efi'ective sparks.

Should the operator. desire to run solely on battery'or continuous current ignition, shifting of the switch arm 48 to B or battery position causes the switch contact .46 to continue to bridge the magnet contacts and 37 and brings the contact 43 into engagement with contact finger l0, resulting in the establishment of operati-ve conditions in the battery or continuous current circuit, above described, and ground ing of the magneto.

As stated above, a magneto generator is usually inefl'ective at low speeds of the enreasons which are well understood and need not be here stated, alternating current, supplied by the magneto generator, for ignition purpose, is desirable during normal running of the engine. However, increase in speed of the engine, and resultant driving of the magneto at corre spondingly advanced speed, sets ,up shifting of the magnetic flux or field ot' the mag neto to a degree greater than the normal or possible angular advance adjustment of the circuit interrupting means, such shii't ing resulting in movement of the current wave peak to a position materially out of synchronism or coincidence with the desired moment of ignition. I

As stated above, I have provided switch mechanism whereby occupation of the interrupter or timer mechanism of the battery circuit of spark retard? position, as incident to starting of the engine, completes a circuit for the controlling magnet coil 22 when the primary winding 15 of the spark coil is connected in the battery circuit through out out or relay winding 9. Such switch mechanism, however, is not limited in function to the establishment of a battery ignition circuit during initial operation of the engine, but is designed to cut in the battery or continuous current primary ignition circuit when the magneto generator develops weakness at high speed or at low speed of the engine and accordingly by merely making adjustment of the interrupter'or timer mechanism in'the direction of spark advance or retard. This mechanism includes, essentially, insulated double contact mechanism 52 and an insulated relatively movable contact 53, carried, as llldlcated, by a movable element of spark adjusting means. Shifting of the contact 53, upon advance or retard movement in adjustment of the interrupter mechanism, establishes a short circuit around the switch con- 'ness or become ineffective during driving thereof at high speed, shifting of the interrupter nicchanisn'i to a spark advance position not only completes or establishes the continuous current circuit from generator 2,

but simultaneouslyadjusts the interrupter mechanism for substantial continuity of the moment of ignition. weakness of the magneto is developed upon the assumption of lower speed, it being necessary to shift the' interrupter mechanism. to spark retard position before the continuous current ignition circuit can be established. Furthermore, it will be seen that these connections are made without disturbing the magneto switch connections, so that there need be no manipulation of the switch member L1 preparatory to natural restoration or recovery of the magneto to normal condition. I

The degree of advance or retard at which thccontinumls current ignition circuit may he cut in by spark adjustment of the interrupter or timer mechanism, is preferably such in each case as to establish the continuous current ignition circuit at a suitable point intermediate full advance and retard not only so as to be effectively responsive to initial development of weakness in the magneto. but to permit of the use of said continuous current in flexible manner through proper spark adjustment. This implies the maintenance of tho'closed shunt circuit of the magnet winding 22 during further spark adjustment of the interrupter or timer after the establishment of such cir-- cuit, by the provision of a yieldable switch arrangement, and I provide such means by the em 'iloyment of the interrupter or timer construction indicated in Fig' 1 and more clearly set forth in Figs. 4, 5. 6 and 7. "Re ferring more particularly to these latter are more didectly carried or housed by ashell member 54 nesting in an outer casing or housing 55 which supports or to which is connected the usual distributer casing 56 of distributer mechanism, such as distribu-' ter mechanisn'i 18, indicated in Fig. 1. The casing 55 is'provided with a usual base 57 (see Figs. 5 and 6) recessed to pivotallyfit the top of a support or bearing 58 through which passes the actuating shaft 59 of the interrupter or contact cam 30. A frlctlon clamp on anti-rattling device 60 urges the base 57 to its scat. This means comprises a spring 61 interposed between the top face of the base 57 and a washer or abutment 62 on "a pin or stud 63 fixedly carried by the support 58. and extending up through an opening 63" in the base or platform 57. This opening 63 is elongated to permit of limited pivotal movement of the timer casing relatively to the shaft 59, and carried by the base is a post orstud 64 connected to which and the fixed stud 63 is a contractile spring (l5 which tends to hold the timer casing 55 in fixed (preferably full retard) position so that the inner timer shell 54 may bcpivotally shifted for rotative adjustment of the contact lever relatively to the cam for limited or normal spark advance and retard without attending shifting of the outer casing 55 carrying the distributer casing 56. The inner casmg54 is yieldably clamped to the base of the outer casing by suitable friction devices, comprising a pin' 63 depending from the shell 54 through elongated concentric slots 63 (see Fig. 4) formed in the bottom of the outer casing 55, and a spring 61" interposed between the bottom of the outer casing and a' head or abutment 62 on the pin 63"; it being understood that the slotsare sufiiciently elongated and the clam ing members are under such tension as -wi 1 permit of movement of the shell 54 within the outer casing 55, as stated, without resultant moving of the latter casing, which shifting of the inner casing may be effected in an desired manner, as by means of a radia arm 66 which connects with the inner casing, as clearly shown in Figs. 5 and 7, through a slot concentrically formed in, the bottom of the outer casing 55.

The insulated switch contact or finger 53 of the interrupter mechanism is so carried by the timer of interrupter as to be movable with movement of the mner casing 54 while the double contact 52 is shown as comprisingan insulated post 67 carried by the floor or bottom wall of the outer casing 55 and extending up through an arcuate openin 68 in'the bottom of the inner shell 54 an provided with spaced resilientcontact fingers 69 and 70. 4

'It will be readily seen that pivotal shift- I trolled by tension of the contractile spring 65.

ing of the inner casing or shell 54 will bring the contact finger or post 53 into engagement with either yieldable finger 69 or 70 according to whether the arm, 66 i= shifted in the direction of spark advance or retard.

As stated above the degree of rotative adjustable movement (which may be conthe length of the slots 63 or the openin 67) of the inner casing 54 should be 'vsu cient to obtain spark adjustment within the range of normal running speed. As a result, the distributer 56 remains stationary during the greater part of the time of operation of'the engine, and thus there is no extended working back and forth of the spark plug leads or cores at their juncture with the distributer box or casing with attending wear and liability to disturbance of terminal connections. \Vhen the independent movement of the inner shell 54, ,in

spark-advancing, has reached its termination, and further advance is desired, conmovement of the outer casing 55 undenthe Such further movement of the two casings in unison preserves contractual engagement between contacts 53 and 52 (finger 69) so that when the engine is on M the continuous current ignition circuit is available for assistive or supplementary ignition. As the spark is retarded from this higher advance position, the outer casing (with the inner shell) returns, under the action of the spring 65, to normal position. i

The system and mechanism described above concerns that type of system wherein the spark is formed, in the battery ignition c rcuit, by the interruption of a primary circuit and resultant building up of a high potential sparking current. in the secondary winding or coil to which is connected the distributer mechanism. It will be apparent that the principle of my invention will not be departed from bit may be readily em bodied in a system in which'the spark is formed by the closing of -a primary circuit interca-lated imfwhich may be suitable buzzer or vibrator mechanism for the purpose of trembling the current and causing the formation 0 a cascade of sparks at the terminals of the plugs. I have indicated such a system in Fig. 2 which diagrammatically is the same as Fig. 1, with y the exception that a modified form of timer port 26" properly. insulated, and provided with an arm 28 which corresponds in func tion with the arm 28 described above. Energizing of the timer magnet 22 attracts the arm 28 against the action of spring 31', moving the timer contact blade or finger 25 into position for contactual engagement thereof by a positively driven contact cam 30, grounded at 29. This contact 25 and the cam 30 constitute the means by which the circuit of the-primary coil or winding of the spark coil is periodically closed in proper synchronism with the engine, and included in this primary circuit or connected across the contact lever 25 and the contact cam 30 is the condenser 95 and vibrator mechanism 15 comprising vibrator blade 15", contact 15 and a magnetic corle 15 which may form part of the spark coi 15.

In this modified arrangement shown in Fig. 2, the closing of the circuitof the timer magnet coil 22 by shit'table adjustable movement for spark advance or retard is effected by coactive engagement of the contact post or finger 53 with the yieldable contact blades 69 and 70 in function to the yieldable fingers 69 and 70 described above. In. this arrangement it is assumed that the distributer mechanism 18 or the distributer casing 56 is carried by or connected to the timer casing On account of the instantaneous formation of the spark upon interruption of the primary circuit it is possible, as disclosed above in connection with description of Fig. 1, to ad 'ance and retard the spark within normal 'ange or operation of the engine without at the same time correspondingly advancing or retarding the distributer, the angular degree of contactual movement of the distributer arm 17 over each segment 19 of the distributer being such as to complete (without shiftable adjustment of the distributer) atany point within the normal range of spark adjustment of the interrupter or timer, a spark plug circuit. In systems employing a vibrator primary circuit in which the spark is formed by closing the circuit, the incidental lag of the current and the necessity for extending contact dwell requires, in obtaining desired spark advance and retard, simultaneous movement of the timer or distributer mechanism through the whole angular range of adjustment. Therefore, it will be seen that if in the use of the system disclosed in Fig. 2, it is desired to use a timer or circuit controlling device, the movable contact or contacts of whichare more directly carried by an inner adjustable shell, and in which the switch elements for establishing the shunt circuit of the magnet 22 are housed, the distributer casing 56 must be so mounted or connected to the inner casing which correspond or shell 54L of said previously described interrupter or timer constructionor must be so otherwise connected as to be shiftably adjustable in unison with adjustable movement of said inner shell or casing.

It will of course be apparent that my invention is not limited to the employment of directly connected interrupter or timer and distributer mechanism. These elements may be separately formed and separately driven. l urthermore, the distributer mechanism of the usual magneto generator may act in the capacity of distributer in the battery or continnous currentignition circuit. I have indicated such an arrangement in Fig. 3 which otherwise discloses a system corresponding with that illustrated in Fig. 1, and in which like parts accordingly bear like reference numerals, so that it is unnecessary to here repeat the description and operation other wise than to disclose the feature of utilizing a common distributer element. As stated. this common distributer element, shown in Fig. 3, may comprise the distributer 49' of a magneto generator 49. It'is well understood that this distributer of the magnetois operatively associated with the high tension winding of the magneto generator. I have indicated this high tension windin (not shown) as being connected, as by lead 71, to an insulated switch contact 01' post 72, carried by the interrupter casing 23, while to a movable insulated switch member 73 I connect, as through. leadHythe usual rotating arm or distributer element (not shown) of the magneto generator. The high tension winding 16 of the battery circuit spark coil or transformer 14 connects with an insulated switch contact 75. Re ferring more particularly to F ig. 9, which illustrates in lar er view the interrupter mechanism of the battery ignition circuit of Fig. 3, it will be seen that the movable switch element 73 is operatively carried b an oscillating or pivotal switch block 76 which is adapted to be actuated by movement of the arm or armature 28' carried by the pivotal interrupter contact mounting mechanism 76. This movement in the particular construction, is effected by me'ans of a pinion 77 carried by the switch block 76 and which meshes with a short rack or toothed foot 7 8 formed on the arm or armature 28.

The adjustment between the armature 28 and the switch block 76 is such that when the interrupter or, timer mechanism of the battery or continuous current ignition circuit is in operative condition, the high ten sion win-ding 16 of the spark coil 14 will be connected to the magneto distributer mechanism 49' via contacts; and 73 and lead 74, and when the interrupter mechanism of the battery ignitioni'circuit is inoperative, the high tension winding of the magneto generator connects with its own distributer mechanism 19" via lead 7]., switch contacts 72 and 73 and lead H. This is brought about by the fact that movement of the armature in either direction, whether by attraction of the interrupter or timer magnet or by the returning action of the spring. 31, alternatingly shifts the yieldable switch blade 78 into engagement with the switch posts or contacts 75 and 72 respectively.

From the foregoing description of the system and mechanism set forth in views 1, 2 and El, and as mentioned above, it will be readily seen that after the engine has been started and the switch arm 48 occupies any of the positions when the battery connections are established in the various manners above set forth, including M or magneto position ofthe switch arm 1L8, maintenance of closed circuit condition of the winding 22 of the interrupter or timer mechanism obtainsby reason of the fact that the magnetic cut out or relay of the main generator 2, remains closed during self-propulsion of the engine and. generative driving of the generator 2. Dro) )in of the 5 mod of the x PD engine below self-propulsimi or stopping thereofwveakens the n'iagnetic attraction in the cut out core 7 so that a counter How of current from the battery .4 through the relay or cut out winding 9 neutralizes the magnetic attraction, releasing the arn'iature 12 to the pull of the spring 13, separating the contacts 10 and 11 and interrupting the circuit of the coil 9 and therefore the circuit of the coil of the interrupter or timer magnet 22 which in turn causes the shiftable contact element of said mechanism to move to an inoperative position as already described. As a result, the spark coil 14 is brought out of connection with the battery.

through breaking of the primary circuit upon contactual separation of the interrupter ortimer arm or armature 28 or 28' and the core 21 ot the magnet 22, the advantage of which is that the spark coil can not effeet a dissipating pull on the battery when- This would be other- -w1se were all. connections of the magnet the engine is idle.

*winding established with .the battery through grounds 29 and 30 01 in such other manner as topreclude the cut-out eli'ect of the magnetic cut-out or relay'operation of which is controlled or influenced by the generator 2, which, it will be presumed, is constantly driven. when the engine is in' operation.

It will be apparent that many changes may be-made-inthe various circuit arrangemerits and mechanism described. Any desired switch arrangement may be used for making the various circuit connections outlined.

The advantages of my invention will be found to reside in an arrangement whereby subject matter of Letters Patent No. 1,071,373, granted to me August 26, 191.3,

and is not therefore claimed herein.

\Vhat I claim and desire to secure by Let ters Patent is:

1. In ignition systems and apparatus, circuit controlling means comprising a yieldable contact, a shiftable support therefor and actuating means, and means, comprising said support, for bringing the contact into and out of operative association with said actuating means.

In ignition systems and apparatus, circuit controlling means comprising a yieldable contact, a pivotal support therefor, and actuating means, and means, including said. support, for bringing the contact into and out of operative association with said actuating means.

'(ftllll means.

In ignition systems and apparatus, circuit controlling means comprising a contact lever carried by a sup 'port, an actuating cam, and means for varying the position of the support, whereby the contact lever may be brought into andoutof operativeassociation with the cam.

6. In ignition systems and apparatus, circuit controlling mechanism comprising a plurality of contacts normally in engagement with one another, a yieldable lever carrying one of said contacts,a support for the lever, actuating means, and means for moving the support, for bringing the lever into and out of operative association with the actuating means.

7. In ignition systems and apparatus, circuit controlling mechanism comprising a contact lever and actuating means: a mov able support for the lever, and nieans for erati'i' 'e and non-operative.

mg contactual means moving the support, for rendering the controlling mechanism operative and non-operative.

8. In ignition systems and apparatus, circuit controlling mechanism comprising a plurality of coactive contacts, a support for said contacts, actuating means, and means for shifting said support, for bringing the contacts into and out of operative association with said actuating means.

9. In ignition systems and apparatus, circuit controlling mechanism comprising a plurality of coactive contacts, a support for said contacts, means for bringing one contact into and out of engagement with another contact, and means for shifting the support, for rendering the contacts operative and non-operative.

10. In ignition systems and apparatus, circuit controlling mechanism comprising a contact lever, a pivotal support therefor, actuating means, and means for pivotally adjusting the support, for bringing the lever into and out of operative association with the actuating means.

11. In ignition systems and apparatus, circuit controlling mechanism comprising contact devices and a pivotal support therefor, and means for pivotally adjusting the support, for rendering said contact devices op- 12. In ignition systems and a ppa" 'atus, circuit controlling mechanism comprising a contact lever mounted on a pivotal support, cam means for engaging the lever, and means for pivotally adjusting the support, to bring the lever into and out of operathe juxtaposition to the cam means.

13. In igi'iition systems and apparatus, circuit controlling mechanism comprising a fixed contact, a yieldable member constitutnormally engaging the fixed contact, a pivotal support for the yieldable member, cam means for intermittently engaging the yieldablc member, and means for bringing the yieldable member into and out of operative association With the cam means.

1a. In ignition systems and apparatus, circuit controlling mechanism cmnprismg a contact lever and actuating means, a p1votal support for the lever, and means, in-

the contacts, magnet, for moving trolling operation of the . plurality of contacts, a movable support for and means including an electrosupport, for conthe contacts.

16. In ignition systems and apparatus, circuit controlling mechanism comprising a contact lever, a pivotal support therefor, co-

operative an electromagnet, .t'or

cam means, and means, including flClJLlSfilllg the support, for bringing the lever into and out of operative association with said cam means.

17. In ignition systems and apparatus, circuit controlling mechanism comprising contact devices and a pivota and means, lncluding an pivotally ad usting said 1 support therefor electromagnet, for support, for rendering the controlling mechanism operative and non-operative.

18. In ignition systems and apparatus, circuit engaging the fixed contac controlling mechanism comprising a fixed contact, a yieldable contact normally t, actuating means for separating the contacts, and means for bringing the contact lever into and out of operative association with the actuating means and Without varying the functional relationship of the contacts.

19. In ignition systems and apparatus, circuit controlling mechanism. comprising a plurality of contacts, an electromagnet, and

a support for the'contacts, having an arm constituting an armature for the magnet.

In testimony whereof I have hereunto set my hand.

RICHARD VARLEY.

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