US1101956A - Ignition device for explosive-engines. - Google Patents

Description

E. PODLESAK.

IGNITION DEVICE FOR EXPLOSIVE ENGINES.

APPLICATION FILED NOV.29, 1912.

Patented June 30. 1914.

rum. ronnasan, or TIFFIN, on o.

IGNITION DEVICE FOR EXPLOSIVE-ENGINES.

Specificatlonbi Letters Patent.

Patented June so, 1914.

Application filed November 29, 1912. Serial No. 734,143.

and break igniter and magneto of the type described in myapplication Serial .No. 639,738, filed July 21, 1911, wherein the rotor is o eratively related tothe movable electrode of the igniter to produce an igniting spark as the rotor causes an electric impulse to be genegted in the windin s, the rotor being n ov in one direction y an actuator up erating in timed relation to the piston of t e engine and .returned quickly by spring action to normal position when released frorn' such actuator, whereby the rotor causes a rapid change in the magnetic flux, through the energizing windings of the generator and a consequent flow of the igniting current.

The principal object of the present in' .Qventionis the provision of a device in the form of an attachment for such combined igniters and generators, whereby the rotor tan be manually operated to produce an electric impulse for the; igniting spark so that the engine can be started on the spark or without the necessity of cranking. This is especially advantageous in large engines where starting b cranking is practicall impossible. Smal engines equipped wit-1 the combined igniter and generator described do not need this manual starting device as the generator will operate with the engine during cranking, no matter how slowly the cranking takes place, since the s iarking current is generated by the return of the" rotor under the influence of its springs when the rotor is released from the actuating elementathat moves synchronously with the vcrank shaft during the cranking. In the caseof large engines, however, the starting is accomplished by a plying a charge'of explosive mixture to t e cylinder when the piston is in the right position for starting a and then operating the rotor actuating device by hand, such device serving to engage some part connected with the rotor so as to move the latter to cocked position, and at the same time place the return springs for the rotor-under tension, and while in such whereby to hold the 'means for the rotor can be set to oscillate the 1 there.

; gierees. Without proper gaging means, it is 4 cocked position, the starting device is released to permit the rotor to rapidly return under the contraction of its springs and thereby cause the igniting current to be generated in the winding, the movable electrode of the igniter being, of course, operated by the rotor, as in normal operation, so that the spark will be produced'to ignite the charge in the c linde l Anot or object of the invention is to so construct the magneto operating or starting device that the same can be used as a gage rotor in its proper cocked position so, that the actuating rotor through the proper angular movement and release rotor at the proper instant. This is of articular importance, as heretofore asbeen no means of accurately ad- 7 5 Justrng the actuator for the rotor, general d1- rections being given by the manufacturer for 1 the user to set the actuator to give the rotor an angular movement of a certain number of 8O cult to obtain an adjustment to give the f rotor the required number of degrees, and as a result, whenthe rotor is not given the proper angular movement, a current of sulficient strength cannot be generated, so that less-power is obtained from the engine and starting is difficult, whereas when too great an angular movement is given to the rotor, due to improper set of the actuator, undue strain is placed on the parts so that excessive wear results.

With these and other objects in view, as will appear as the description proceeds, the invention comprises the various novel features of construction andarrangement of parts which will he more fully described hereinafter and set forth with particularity in the claims appended hereto.

In the Faccompanying drawings, which illustrate one embodiment of the invention,

Figure 1 is aside elevation of the apparatus showing the use of the starting and gaging device in position for gaging the set of the actuator with the rotor in cocked position. Fig. 2 is a detail plan View showing the starting and gaging device in its relation to the spring-actuating means for the rotor. Fig. 3 is a side view of thestart-ing and gaging lever showing its relation to the crank arm of the rotor. Fig. 4 is a sectional View of the device showing the means for actuating the rotor to cocked position,

to I

' and the relation of the rotor shaft to the movable electrode.

eamilar reference characters are employed to deniguate corresponding parts throughout the views.

Referring to the drawing, 1 and 2 designate the permanent magnets of the generator, and 2*" and 2" the pole pieces having git-moral lug-windings 2 and 2, respectively, there being mounted between the pole pieces a cruciform rot or The rotor is mounted on a shaft 17 which is journaled in end plates 3 whiclii form part of the "frame of the magneto. On one end of the shaft 17 lastened a bar forming the oppositelydispeoed crank arms 14 which are provided with pivot pins 16 that carry spools 12 to which the inner ends of the rotor returning springs 13 are connectelh the outer end; of the springs being hooked over-spools 12 on the pivot posts or pins 11. The springs 13 and arms 141-. nori'i'iall} lie in a straight line passing through the pivot posts 11 and ro- -tor shaft 17. and when the rotor is moved to "cocl(ed position, the crank arms 1%. move with the rotor and place the springs 1?; under tension by expansion, as shown in Fig. 1. ()n the end of the shaft 17 opposite from the crank arms 14 is a trip finger 39 and a hammer arm 44.. Adapted to engage with the trip finger 39 push rod or ac tuator which connected by a wrist pin 27 with a dial; 253 fastened to a shaft 26 which rotates with the Crank shaft of the engine. 'lhe push rod 28 is supported ata point inlerinmliate its ends b) a grooved roller 32 journaled on the pin 81. which is carried by an arm 30, such arm being adjustably connected b a bolt 90 to a lug on the frame of the device. This roller 32 forms a fulcrum on which the push rod has a rocking movcn'ient simultaneously Will) he back ind forth longitudinal movenent and the tip or free end of the rod 2'6; '15 a lapted to engage the trip finger 39 to move lhe rotor to corked position and then to slip oil the trip linger so that the rotor ran wimp bael-i lo normal position. in order to obtain the proper adjlutment oi the actuator or push rod 25 so that the trip finger will be releasol at the proper moment, the roller-earrying! a rm 2% can be swung up or down about the bolt ill) as a center, and furthermore the connection ol the rod With the rotaving element 35 can be adnsted lrv n'ioring the rod 28 into or out of the socket piece 20 and clamped in the right position bV the set screw 21.

The igniter is o? the usual constrr tron and comprises a frame body l which has stud hole 234 for clamping: the body to the engine cylizder. ll/ l] the body P of the ignite]- an extension 15 which is provided with a shelf on which the generator is niou ed. The cylindrical body portion 2') enters the usual opening in the engine cylinder for the :eiuiter. in this body portion 1) are fixed and mo 'able electrodes (2 and e the latter having an arm 0 that carries a I sparking point (1 adapted to engage the sparking point a on the fixed electrode, the maid sparking points being, of course, on the inner ends ol the electrodes so as to ignite the explosive charges in the engine cylinder. On the outer end of the movable electrode 6 is an arm 4 which carries an anvil. member in the form of a screw l5) so positioned as to be struck by the hammer arm 14, the ecrew 4."; being adjusted with respect to the hammer arm to obtain the proper results. The movable electrode is provided with a spring or equivalent means tending to hold the sparking: terminals (2 and 0" in Contact and one way of accon'iplishiug this is to provide a spring lli, Fig. 1. which con uected with thi arm fl l and with the body 1 of th igniter. When the rotor is rocked the arm 41- moves away from the arm 43 to thereby permit the electrodes to come into com'act. and on the return movementot the rotor. the arm 41 imparts a pm ert'ul hammer blow on the arm 41-3 to rtl'ect a quick separation of the electrodes for the prm'luriion ot' the igniting spark.

The Starting and gaging device which ronstitutes the subject-matter of the present invention will now he descrila-u'l. This consists; of a lever l which is 'l'ulcrumed on one oi the pivot posh ll and has a handle so that in reality the device is a double arm or hell crank lever having a pivotal move ment on the pin or post 11. The arm -lis ;-,:ulli -iemlv greater than the distance between the pivot post 1'1 and the outer end of the adjacent arin 1.4 of the rotor that the free end of the arm 4': can el'igagie the pivot post or n'ieinber 16 of the crank arm l-iland cau e the rotor to be moved to rocked position by the upward movemenl o'l' the arm Normally the starting device A is suspended in the dotted line oailion. Flt ,1 l, and to start the engine b meaneor a spark, the handle 3 is swung upwardly lo the left to engage the arm l with the member l of the rotor crank arm ll. The movement of the handle 5 is then continued in the same direction so as to give an angular movmnent to the rotor and to pla e the springs 13 under tension. Finallv. when the cocked position is reached. the r rm 4t will slip under the member l6 of the crank arm 14 and allow the rotor to spring back to its normal position. t dorr' not matter hoivslowly the rotor is moved to corked positionb v the nianuallv artuated starting device it, as the electric impulse is generated by the return movement 01" the rotor from cot-lied position when'the arm 4- releases the rotor. it will be understood that the eleetrod s of the enemas" igniting device will be separated at the time t e electric impulse is generated, just as in the normal operation of the ignition apparatus. In order-that the arm 5 may clear the member 16, the said arm is provided with an offset w, thereby permitting the arn: 5 to be raised past the member 16 and the arm 4 engaged with such member.

To adapt the device A as a gage for holding the rotor in cocked osition while the actuating means 28 is being adjusted, the free extremity of the arm 14 is provided with two pro ections 6 and 8 with an intermediate depression 7, the bottom of the depression being at a radial distance a, Fig. 3, from the center of the pivot post 11, while the projections 6 and 8 are located at the radial distances 6 and 0, respectively. When the sun 4 is brought into engagement with the member 16, the projection 6 will first engage the member and finally a position 1s reached where the member 16 enters the depression 7, as shown in Fig. 3, and in this position the projection 8 looks the parts against return movement under the tension 0 the springs 18, and as the combined length of the arm 4 and crank arm 14 is greater than the distance between the center of the crank shaft 17 and pivot post 11, a toggle arrangement is provided, locking the rotor indefinitely in cocked position. The actuating element 28 can now be adjusted in the part 20 and the arm 30 also adjusted so that the tip of the member 28 will just enga e the tip of the trip finger 39. After this a justment is efiected, the device A is released from the member 16 to allow the rotor to return to its normal position. In this manner, the'release of the rotor from the actuating mechanism can be easily, quickly and accurately determined and thus the best operating results of the generator, igniter and engine obtained.

From the foregoing description, taken in connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operationof the invention, together with the apparatus which I now consider to be the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative, and that such changes may be made when desired as are within the scopeof the claims appended hereto.

Having thus described the invention, what- I claim as new, is

1. In an 1gn1t1on apparatus, the combirotor, an'actuator for moving the rotor in one direction and automatically releasable therefrom, means for quickly moving the rotor in the opposite direction when recrank arm and rotor to normal position. nation of a current generator including a leased from the actuator, and a manuallyactuated device for moving the rotor and releasing the same similarly to the said actuator.

2. In an ignition apparatus for explosive 7! engines, the combination of a current generator including a rotor, engine-operated means for moving the rotor to, and releasing it at, cocked position, means for suddenly moving the rotor upon being released, and a v manually-operated device for moving the rotor to, and releasing it at, cocked position for starting the engine by spark ignition. v

3. In an ignition apparatus forexplosive engines, the combination of a current generator including a movable inductor, an actuating means releasably engaged with the inductor for moving it to a given position, means for suddenly moving the lnductor after such position is reached, and a starting device for moving the inductor to, and

releasing it at,sai'd position for the generating of ignition current to start the engine.

4. In an ignition device for explosive engines, the combination of a current generator including a rotor, an arm on the rotor,

a spring connected with the arm, an engineoperated device for moving the rotor in a direction to place the spring under tension and adapted to then release'the rotor, and a manually-operated device adapted also to move the rotor to place the spring under tension and thereupon release the rotor.

5. The combination of a current generator including a rotor, acrank arm on 'the rotor, a spring connected with the rotor, an actuator for the crank arm, and a lever having an arm adapted to releasably engage the crank arm for moving the rotor and releasing the same similarly to the said actuator.

6.- A current generator including a rotor, a crank arm connected with the rotor, a spring having one end connected with the arm, an anchor for the other end of the spring, and a devicemou'nted'on the anchor for the spring and movable into engagement with the crank arm to move the latter and place the spring under tension and re lease the arm for permitting the spring to quickly return the rotor.'- Y

7. The combination, of a current generator including a rotor, a crankarm on the rotor including a projectingfmember, a spring, connected at one end with thesaid member, v and a swinging devicem'ovable into enga'ge- 12o ment with the said member to swing the crank arm and place the spring under tension andreleasableifrom the said member to permit the spring to quickly return the IIS 8. The combination of a current generator including a rotor, a crank arm on the rotor havin aprojecting member, a spring connecte at' one end with the member, an anchor for the other .end of the spring, a use engage with and move the trip linger to a swinging member pivoted on the anchor and longer than the spring and having its tree 1 end adapted to en 'agc the member for swinging the arm and moving the rotor while placing the spring under tension and to release the member to permit the spring to quickly return the arm and rotor.

9. The combination of a current generator including a rotor, a device for moving the rotor to cocked position, means for quickly moving the rotor from cocked position, and a gaging device pivoted on the generator for moving the rotor to cocked position and for holding it in a predetermined cocked posi tion to permit the device to be adjusted with respect to the rotor.

10. The combination of a current generator including a rotor, an adjustable actuator for moving the rotor to a given position and then releasing the rotor, means for quickly moving the rotor when released, and a device mounted on the generator to engage the rotor for moving same into and holding it in said given position for permitting the adjustment of the actuator. I 11. The U()Il1l')il1titi0ll of a current generator including a rotor, a trip finger connected with the rotor, a push rod adjustably mounted with respect to the trip finger to given position and then release the same, means for quickly moving the rotor when the actuator rcleases the trip finger, and a device for moving the rotor and holding it in such position of release to permit the actuator to be adjusted with respect to the trip finger.

t 12. The combination of a current generator including a rotor, a crank arm connected with the rotor, a member on the arm, a spring connected with the crank arm, a device movabie into engagement with the member for moving the arm against the ten sion of the spring and adapted to interlock with the said n'ieinher for holding the arm stationary while the rotor is in cocked position, and a rotor actuator adapted to be adjusted with respect to the rotor while held, in cocked position bythe said device.

13. The conil'iinatioir of a current generator including a rotor, an arm on the rotor, means for moving the rotor to cocked position, a spring placed under tension by the increment oi the rotor to cocked position for returning the rotor when released from the actuator at cocked position, a swinging member movable into engagement with the arm for moving the rotor to cocked. position and adapted to hold the arm in such cocked position, and means for adjusting the position of the actuator while the rotor is held in cocked position by the said swinging member.

14. The combination of a current genera tor including a rotor, an arm thereon, a spring connected with the arm, a member on the arm, a swinging lever mounted on the generator to engage the member and slip past the same to move the rotor to cocked position and having means with which the member is adapted to interlock for holding the member in cocked position, and an engine-operated actuator for moving the rotor to cocked position spect to the rotor while the latter is held in cocked position by the said swinging lever.

and adjustable with re- In testimony whereof I atlix my signature I witnesses.

in presence of two,

' Eli 11L PODLE SAK.

Witnesses A. E. scene,

33. Hammers.

Images