US1390376A - Automatic speed-governor for internal-combustion engines - Google Patents

Description

R. A. OGLESBY.v AUTOMATIC SPEED GOVERNOR FOR INTERNAL COMBUSTION ENGINES.

APPLxcATloN FILED AUG.5,1918.. LSQBST) Eatentedfept. T13, 1921.

atroz ne To all whom t imag -l Nif-ED STATES-- A RICHARD ARNOLD oGLE'sBY, OE sOUTH BEND, 1NDIANA, A'ssIGNon To QUICK ACTION l IGNITION COMPANY, OE SOUTH BEND,INDIANA', A CORPORATION OE INDIANA.'i v I AUTOMATIC sPEED-GOvEnNOE Foit'INTEENALfcOMBUsTION ENGINES. y

specificati@ tf Application' led August 5,

Bev it known thatV I,` RICHARD. ARNOLD.' OGLEsBY, a citizen of the UnitedStates, residingat'South Be nd,in the county of St.' Joseph and State of Indiana, haveinvented certain new and useful Improvements in Automatic S eed-Governors for Internal- 'Combustion' ngines, of which the following A. is a specification.

adaptation shown in Fig. 1 assembled in a' limits.

being shown diagrammatically. ig. 5.

i companying drawing are exempliications of My invention relates to improvements in automatic speed governors Vttor internal combustion engines and it more especially com-r prises thefeatures-pointed out in the annexed claims.

The purpose of my invention is to provide a simple construction which under excessspeeds automatically deprive the engine spark'plugs of current and that will restore current thereto at reduced speeds; and that will bring about' this regulation either mechanically or electrically. -v

With these and other related ends inv View Iv illustrate in the. accompanying drawings su'ch instances of adaptationas will disclose the broad underlying features without. limitingmyself to the specific details of adapta-v tion shown.

Figure 1 is an elevation of the adaptation of a compound governor to a cam shifting device.

Fig. 2 is an elevation in section of the completed magneto. Fig. 3 's a detached elevation ofa simple governor'control for acircuit breaker cam. Fig. 1 is asimilar elevation'to Fig. 3, of a modified form of governor arm and con-` nections.

Fig. 5 is an elevation of a short circuiting governor, the circuits connected therewith Fig. 6 is a side elevation of In carrying my invention into practice I may utilize numerous mechanical expedients and electric alternatives without departing from the spirit of the invention. The instances of adaptation disclosed in the accertain equivalents which may be used sepa' rately or combined with each other or with obvious modifications as needed to meet they variable requirements of the industriesin whose behalf the same may be employed.

Internal combustion engines to which governors of this class are adapted have the ltetters Patent. Patented 191s. 'serial No. 248,361.

other rotating member. The governing `actionI rests in supplying current orA with- Smeaattached to the crankshaft 1,"or'anyv j 'I holding itl from the usual spark plugs.

These are suppliedfrolnjan armature coil' 7 through the secondary.' Si of armature ycoil 7. fromimpulses set up in' vtheprimary of.'

such lcoil by the break actuated by the cam 20 andthe impulses-arev accentuated by the usual formogcondenser 5. The varmature coil 7 is suppitedon a plate `6 which is supported by". a`--projection from the engine frame that is concentric -with the shaft 1. vOn this the plate I'nayberocked to and -fro as needed to' advance 'orretard the spark in any wellknown manner."

Outside of. this plate a Supportingplate or cap 8 is secured to the crankshaft itself I so as to rotate with it. `This platecarries the permanent field 'magnet 9'in close proximity to the heads of fthe 'armature coil 7., inducing periodiczimpulses in thiscoil; A

-camA 20 rotates with the plate 8 and once for each revolution, if its radial position is not changed moves the circuit breaker shoe 21 -and the contact arm 2 2 to break-the circuit at contact 23 .each time -the best point of an induced 1 impulse `is' reached. If these breaks Occur once. foreach revolution invariablythe enginespeed will vary with the load etc., makingit impossible to hold an unvaryinguniform Aspeed within desired To bring aboutthe governing function at excessive speeds the spark plugs 2 -may be deprived of current so that the number of explosionsin the engine cylinderswill be reduced and the speed lowered accordingly.

As soonas the lower speed limit is reached.

the spark` plugs are again supplied with current to restore the interrupted explosions and the speed again rises. The range Of'thehigh and'- low speed limits depends on the sensitiveness 'of the governing means.

A governor support 10' shown in-Flgs. 1

and 2 may be used to embody a self-contained unit fastened to the inside of the mag made thefsubject of a separate application Serial #248,354 filed Aug. 5, 1 918.- However in this form vof governor, an arm llfis' adaptation exemplified in Fig. 4 through' pivoted at' 12 `to a projection lofi the` supportv 1.0. The long end of this arm carries an adjustable or fixed weight 13 and the shorter end has a coil spring 14secured to it so as to act in opposition to the centrifugal action ofthe' weight 13 as it revolves with the" carrier 8; A limit stop 15 may-be provided.

to define the distance th'e'spring 14 can act, if the same is desired., Between the pivot 12 -and the spring 14 a link.16 is attached.

This link 'transmits the movement of arm 11 to the cam lever 17 in reduced Iamount so as to delicately move the cam 2O in and outl ra.-

l land 3 the cam 20 moves in an opposite radialdirection to the weight 13 while in Fig. 4 they both :move in the same direction. rllhe the action of the radially movedcam 20, that is vsecured to governor v24 which is I-pivoted at 25 to the magnet plate 8, will separatel the breaker arm 22 from contact 23 at the time when no current is being gen'- erated and hold these out of engagement throughout the current generating period,

thus depriving spark plugs 2 of ignition currents.

The only difference between the features instanced in Figs. l and 3 lies in the latter being a single lever while the former is lof'the compound lever type. ln effect the compound system produces a smaller dis.- placement of cam 20 for a given movement of 'the weight 13 than the direct type shown in Fig. 3 however the -more delicate ratio may be approximated by proportioning the distance the weight 13 and the cam 20 are placed from the fulcrum 12.

' To produce the same effect on the spark plugs 2, electrically, the expedient instanced in -F ig. 5 may be used. 1n this a ring 26 having supports 2, 7 is secured to the armature plate 6' in an insulated manner and. a wire connection made therefrom to the side of' the primary circuit which is attached to -contact 23. A governor arm 28 is pivoted to the one magnet carrier 9 at 29. lts one end carries a weight I13 and a spring 14 is attached to the same end to work in opposition to the weight. rllhe other end of the arm 28 at480 has a contact spring which at excessive speeds engages the ring 26 and grounds the primary and thus deprives the spark plug of ignition current. lin this type the mechanical deterioration of' the'br'eaker points through recurring hammer action is of course present but in the other exemplifif cations wherein `the cam itself is removed from action such deterioration is entirely obviated.- p

lit is, in` theV broadest sense immaterial whether veither one of the exemplifications instanced in Figs. 1, 3, 4 or 5 be used vso long as the presence or absence of ignition cur.

rent at the spark plugs 2 is controlled automatically through a variation of speed in the engine, hence the use of all alternatives is claimed consistent with the prior state of the art.

What l claim is,-

1. ln ignition-systems. for internal combustion engines, a' crank shaft, an engine casing, a`n armature plate supported by said casing, a magnet supporting member supported by the crank shaft, a permanent field magnet thereon, a coil on the armature plate adapted to have currents induced therein as the magnet is moved adjacent thereto, a circuit breaker supported on thearmature plate, means rotative with the magnet adaptedto actuate the breaker, one or more spark plugs for the engine, connections from the coil tothe spark plugs, a centrifugal governor carried in unison with the field magnet movement, and means controlled by the governornfor automatically depriving the spark plugs of current at lexcessive engine Vspeeds and restoring the same at lowered speeds.

2. ln speed governing systems for in ternal combustion engines, a main engine shaft, a movable field magnet, a stationary armature, means for moving the field magnet` adjacent the armature through the rotation of the engine shaft, a circuit breaker connected to the armature and supported against rotation, other connections from the latter to an ignition circuit,` a centrifugal governor carried in unison with the field magnet movement, and means for-automatically controlling the ignition circuit through the action of the governor, said means being arranged to deprive the ignition circuit of ycurrent at excessive engine speeds and restore the current at lowered speeds.

ln testimony whereof l aflix my signature.

RICHARD ARNOLD OGLESBY.

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