US1084924A

US1084924A - Magneto-electric generator.

Info

Publication number: US1084924A
Application number: US68447812A
Authority: US
Inventors: Maxime Charles Brenot
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1912-03-18
Filing date: 1912-03-18
Publication date: 1914-01-20
Anticipated expiration: 1931-01-20

Description

M. O. BRENOT. MAGNETO ELECTRIC GENERATOR. APPLICATION FILED MAR. 18, 1012.

Patented Jan. 20, 1914.

4 BHEETS-SHEET l.

WITNESSES Ink/ENTER 1/ (Xe/(es 5/2/70? M. 0. BRENOT. MAGNETS ELECTRIC GENERATOR.

APPLICATION FILED MAR.18, 1912.

Patented Jam.20,1914:.

4 EHBETB-SHEET 2.

. 1 NJENTUR Afar/07c- C/lf/t; 5

All

M. O. BRENOT. MAGNETO ELECTRIC GENERATOR. APPLICATION FILED MAR. 18, 1912.

1,084,924. Patentd Jan. 20, 191i 4 SHEETS-SHEET a.

MTJESSES I WENTU R I 1 0 (flow/5; 5/2042 M. O. BRENOT. MAGNETO ELECTRIC GENERATOR. APPLIGATION IILED MAR.18, 1912.

1,084,924. Patented Jan. 20, 1914.

1 SHEETS-SHEET 4.

* UNITED STA'fE MAXIME t'IHAItLESi FIRM a KENT OFFICE.

NEAUX, FRANCE, ASSIGNOR TO THE MAGNETO-ELECTRlC GENERATOR.

Application filed March 18, 1912.

To all whom may concern:

:Be it known that I, Maxine Cimnn is Bnn'uo'na citizen of the French Republic, residing at 3 Avenue Bourgain, Issy-les- Moulineaux, Seine, France, have invented certain .new and useful Improvements in hitagnetolfiloctric Generators; and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention generators such relates to magneto-electric as are employed for igniting the combustible mixtures in the cylinders of internal combustion engines and more espe cially to devices for controlling the mechani cal interrupter associated with generators of this kind, where the igniting generator is intended. operation with multicylindcr engines having an irregu ar order of igniti'on, such as for instance multicylinder engines with the cylinders arranged in the shape of a fan.

In the usual form of mechanical interrupter, a. disk fastened on the armature shaft carries a relatively stationary electrode and a movable electrode nominally spring pressed into engagement therewith,

but capable of being deflected to a position of disengagement by stationary cams, which are usually arranged in such manuc as to deflect the movable electrode and thus interrupt the ignition circuit at certain points of the rotation of the armature. In two-cylinder-engines this known apparatuscan be arranged to act satisfactorily, though the engine, from the position given to its cylinders, may require an irregular order of ignition. In that case the armature of the igniting machine is coupled to the valve controlling short which is driven at half the speed of the crank and, by a proper displacement of the stationary cams, the moments of interruption can be correspondingly displaced to uniform to the required order of ignition. But in multicylinder engines requiring an irregular order of ignition it is impe ativc to iutcrpose gearing between the valve controllin shaft and the arnuiture shaft of the t3 igniting machine and on the other hand it. is important that the ii'iterruptcr should be mounted on the arn'iature shaft and rotate therewith, so as to obviate the necessity otherwise existent, of interposing slidir Specification of Letters Patent.

l l l l l l l Patented Jan. 20,1914.

Serial No. 684,478.

contacts between the armature winding and the insulated electrode of the interrupter.

is the object of my invention to provide means for controlling the interrupter in cases of this kind, though it is mounted on and revolves with the armature shaft.

My invention consists in providing movahlc cams in the place of the usual stationary cams and inter-posing transmitting mechanism between the armature shaft and the cams by which theyare operated and controlled in such a manner that they engage and operate the interrupter lever in the moments in which ignitions and therefore interruptions are required.

As a rule the irregularities required by fan shaped multicylinder motors, or any other multicylinder motors requiring an irregular ordcr of ignition, can be expressed by alternately advancing and retarding intcrruptions which otherwise are arranged to.

follow each other in a regular order. There fore the simplest method of reducing my invcniion to practice would be to provide a dish concentric to the interrupter disk and pivoted to be rocked on an axis coinciding with the axis of the armature shaft, said dish carrying the cams for intercepting and rocking the interrupter lever and means for rocking the said disk alternately to advance and to retract the cams between consecutive revolutions of the interrupter disk or otherwise in 'vroper time to produce the desired order of ignition. Another manner and the one i prefer, consists in mounting the cams on parts of mechanism operated by the armature shaft and adapted to advance them radially or axially into the path of the interrupter lever in the moments in which inter ruptions are required.

in the drawing lligure l is a diagrammatical perspective view of mechanism to be mounted on the frame of an igniting generator and to he operated by its shaft to advance and retract interrupter cams and Fi is a di:gramnmtical end view of the same mechanism. Fig. is a front elevation partly in section of a magneto-electric generator provided with mechanism embodying my present invention and Fig. 4t is a horizontal longitiulinal section on line 4-4 of Fig. '3. Fig. 5 is a. diagrammatical front eleform of the mechanism embodyvalion ot a mg my lllYtlltlOll adapted to a six-cylinder engine and Fig. (3 a diagram illustrating the ton 32 and retracted therefrom.

order of ignition produced thereby. Fig. 7 is a diagram illustrating a modification of the mechanism producing irregular ignition suitable for a fonncylinder engine and Fig. 8 a development of the same diagram on a straigl'ltline. Fig. 9 is a. front elevation partly in section of a magnetoelectric machine provided with the mrrangement indicated by Figs. 7 and 8 and Fig. 10 a hori i zontal longitudinal section online lO10 of Fig. 9'.

The same reference'numerals represent corresponding parts in all the figures. v Referring to Figs. 1 to 4, represents the armature shaft of-a magneto and 21 a pinion keyed to the said shaft. The

other shafts

22 and 23 are journaled in the frame of the magneto on each side of the armatur shaft and on them are mounted two pinions 24- and 25 meshing with pinion 2 In the present instance these pinions 55 i and are dimensioned to make the

shafts

22 and 23 rotate at half the speed of the armature shaft when the latter is driven. On the outer ends .of

shafts

22 and 23

cams

26 and 27 are mounted to revolve With the shafts. On the interrupter disk 28 is mounted an insulated electrode 29 and a lever 30 carrying the earthed electrode 31 of the interrupter. The outer arm of the interrupter lever 30 carries a button 32 and as the

cam shafts

22 and 23 revolve the cams 26and 27 alternately are projected into the path of the'but- In the present instance stationary cams 33 and are also provided mounted on a stationary ring or disk in the usual manner and placed to constantly intercept the path of the button 82 on the outer arm of interrupter lever 30.

I In Fig. 2 the electrical connections of the arrangement are shown. The armature has two windings a primary 35 and a. secondary One terminal of both windin s is earthed and. the other terminal of the secondary Winding is connected to the spark plugs 37. The insulated terminal of the primary Winding is connected to the insulated electrode 2.) of the interrupter.

' The action of this arrangement is fellows: Figs. 1 and show the position of the mechanism in the meme -t of .ition of the first cylinder. The cam 26 is projected into the path of button 32 and effects an interruption and censemienthp an ignition spark at the spark plug 3?. The button 32 then. passes over the stationary cam 33 without effect because he am 233 is so near cam 28 that the electrorles r235), fil have not had time to close.

.i hen the button. .5 then moves on half revolution v/hcre trikes cam m the nmanti heen turned iliUlllill so as 1}.) he pro rnptuni cause into its g cylinder follows and the button again passes over the stationary cam 34 without etl'ect. The button proceeds until it stands opposite cam 26. This cam in the meantime has been turned so to be out of the Way of the button and the latter therefore strikes the stationary cam 33 and is deflected so as to break contacts and cause. the ignition of the the invention to a six cylinder engine requiring an order of ignitmn as follows:

and so forthj ,measur d on the crank shaft. The pinion 2i mounted on the arn'iature shaft is driven by a palr of Wheels 38., 38 of Which the former is mounted on or revolves in synchronism with theerank shaft and which areso dm'iensioned that the armature revolves three times for every tvso rev 1 1utions of the crank shaft. The diame ter drawn through the two stationary cams 33 and 34lemhraccs an angle of 30" with the diameter drawn through the axes of the two movable cams E26 and 9?. The pinions and 25 are din'iensioncd to perform one rev lution for every three of the pinion 2t.

cam 26 in this instance has two projections QGand. 26 removed 1:20 from each other. .ln the position the parts shown in the drawin button 32 is in the act of striking the rojection 26 on cam 26 and cam 2 is removed 60 from its operative position. Tlhis is, as in the above deseril'ied instamre. the position in which cylinder i is ignited. Button 32. revolves .lSO" and cam 21 shnuh taneousiy revolves 60. ".lherefore the hutton strikes the cam and ignites cylinder ll.

Button 32 again revolves H t) making 360 from the start and; simultaneously r m "36 has revolved 120. 'lhcrelun ufoj 2t; giresen'led and cylinder is ignited. Button after a. further half revolution hnds projection 27' averted and after sll'll' the stationary cam fi l niting e .'lin-- der it. on .1 their llnds helh projec- W l? and nos-e924 therefore cam its operative position and the button strikes stationary cam 34; after revolving 180 igniting cylinder VI. Upon completing the third revolution the button finds cam 26 returned to its initial position, and ignites cylinder I, making the last interval and so forth.- The order of ignition thus obtained is represented by the diagram Fig. 6 and is composed of the following intervals:

. 180 150 180 180 and so forth measured on the circumference of the armature and since the gears 38, 3S drive the armature at a speed which is 3:2 of the speed of the crank shaft, the intervals enumerated above, as required for the crank shaft, are obtained, that is to say and so forth.

3 1 besides the

movable cams

26 and 27 the same result can obviously be produced by furnishing the interrupter lever 30 with two buttons removed from each other by an angle representing the excess of the-longer intervals over 180 or of 180 over the shorter intervals. This modification is illus trated diagrammatically by Figs. 7 and S and an adequate constructional embodiment is shown 9 and 10. In these latter figures all parts are identical with those already described with reference to Figs. 3 and l, with this exception that the station-- cams and 34 are omitted andinst-ead of the button 32 on the outer arm of lever 80 two buttons 352 and 32 are provided.

In Fig, 10 it is seen that the two buttons 32' and 32" are also removed axially from each other and the cams 26 and 27- are provided 'vith actuating surfaces on opposite sides for either button. Thus, accordingly as the revolution of the-cams is-timedwith relation to that of the-armature shaft or the interrupter disk mounted thereon, either button 32 or button 32 will be deflected and the consecutive ignition Will be advanced or retarded to produce the required irregular order of ignition.

Instead of advancing the cams in a radial direction to intercept the path of the button, they might be arranged to be advanced axially, or if the interrupter lever 30 were pivo- .d to be rocked in an axial direction they might be moved either axially or radially to alternately intercept the path of button 32 or allow it to pass.

I desire it to be understood that these and other modifications of the mechanisms individually described might be worked outby 27 is still 180 removed from substituting equivalents to the preferred elements of construction without aifecting the nature of my invention.

Having thus described my invention, what I claim is:

1. The combination with an ignition current generator driven from a multicylinder explosion engine which requires an irregular order of ignition, of'interrupter mechanism comprising interrupter contacts electrically connected to the generator, and a plurality of cams arranged to inove the interrupter contacts relatively to each other at the irregular intervals of ignition required by the engine.

2. The combination with an ignition current generator driven from a multicylinder explosion engine which requires an irregular .order of ignition, of interrupter mechanism comprising rotatable interrupter contacts driven from the engine and electrically connected to the generator, and a plurality of rotatable cams driven from the engine at an angular speed different from that of the 311'- terrupter CODttICtSytllG arrangement being such that the interrupter contacts are moved relatively to each other by the cams at the irregular intervals of ignition required by the engine.

3. In magneto-electric generators for igniting multicylinder explosion engines requiring an irregular order of ignition the combination with an armature shaft, an iii-- terrupter arm mounted thereon and revolving therewith, of cams adapted to deflect said arm to interrupt the armature current and thereby to cause ignition, said cams being eccentrically mounted on revoluble shafts, and of means for revolving said cam shafts in time with the revolution of the armature shafts.

4. In magneto-electric generators for igniting multicylinder explosion requiring an irregular order of ignition, the combination with an armature shaft and an interrupter lever mounted thereon and revolving therewith, of cams adapted to rock said lever to interrupt the armature current and thereby to cause ignition, said cams being eccentricallymounted on shafts journaled parallel with the armature shaft and coupled thereto by means of transmitting mechanism adapted to time the revolution of the cam shafts to correspond to the required order of ignition.

5. In magneto electric generators for igniting multicylinder explosion. engines requiring an irregular order of ignition, the combination with an armature shaft and an interrupter lever mounted. thereon and revolving therewith, of cams adapted toilcflcct said lever to interrupt the armature current and thereby cause ignition, said cams being eccentrically mounted on shafts parallel with the armature shaft, of gearing interposed bctween the armature shaft and the cam shafts, I tons, of cams mounted to be advanced into and of additional stationary cams in the path the interrupter lever.

6. In niagnetoelectric generators for igniting i'nulticylinder explosion engines requiring an irregular order of ignition, the combination with an armature shaft and an interrupter lever mounted thereon and re- :volving therewith of cams adapted to rock said lever to interrupt the armature current and thereby cause ignition, said cams being rceentrically mounted on shafts journaled in the magneto casing parallel with the armature shaft and coupled to said shaft by means of gear Wheels and one of said cams having a plurality of projections disposed on its circumference to intercept the path of the interrupter lever several times during the revolution of the cam shaft.

7 h magneto electric generators for igni ting multicylinder explosion engines requiring an irregular order of ignition, the combination with an armature shaft and an interrupter lever mounted thereon and revolving therewith, the operating arm of said lever being provided With a plurality of butthe paths of said buttons to deflect said lever, and of means for thus advancing the said cams according to the required order of ignition.

8. In magneto electric generators for igniting multicylinder explosion engines requiring an irregular order of ignition, the combination with an armature shaft and interrupting means mounted thereon and revolving therewith, said interrupting means being provided with a plurality of buttons placed in different planes, of a plurality of cains disposed in corresponding planes and adapted to be advanced into the paths of said buttons to actuate said interrupting means, and of means for advancing said cains according to the required order of ignition.

In testimony whereof I attixed my signature, in presence of Witnesses.

MAXIME CHARLES; BRENOT. Witnesses:

MAX BALL, EUG. Lnssii, LUGIEN MEMMINGER.