US1409639A - Speed governor for internal-combustion engines - Google Patents

Description

J. A. ZUEHVLKE.'

4SPEED GOVEHNORIOR INTERNAL COMBUSTION ENGINES'. APPLICATIQN FILED Aus. 5.v 191s.

1,409,639. Pat-mmh 141922- S14/nemici UNITED STATES PATENT OFFICE.

JULIUS A ZUEHLKE, OF SOUTH BEND, INDIANA, ASSIGNOR TO- QUICK ACTION IGNITION COMIPANY, OF SOUTH BEND, INDIANA, A CORPORATION OF INDIANA.

SPEED GOVERNOR FOR INTERNAL-COMBUSTION ENGINES.

Application led August 5, 1918. Serial No. 248,354. I

To all/whom t may concern:

Be 1t known that JuLIUs A. ZUEHLKE,

`citizen oftheProvince of Posen, Germany,

residingat South Bend, in the county of St. Joseph and State of.` Indiana, has invented certain new and useful Improvements in Speed Governors for Internal-.Combustion Engines, of which the following is a specification. v I

My invention comprises improvements in speed governors for'internal combustion engmes and it more especially relates to the features pointed out in the annexed claims.

The purpose of my invention is to provide a mechanically operated speed governor of a very sensitive order, that will control the periods of activity of the usual ignition systems against excessive over or under engine speeds.

I With these and other purposes in view I illustrate in the accompanying drawing such an instance of adaptation as will disclose the broad features without limiting myself to the specific details exemplified thereon.

Fig. 1 is an elevation transverse of the engine shaft offthe governor members in assembled relation to the circuit breaker spark plug, etc., the latter being shown diagrammatically. L

Fi 2 is a sectional elevation transversely of Fig. l showing the assembled relation of the magneto parts with which the governing mechanism may be combined.

My invention may be carried into practice in numerous ways that are obvious equivalents of the exempliication instanced in the accompanying drawing without departing from the spirit of the invention.

In the adaptation shown the engine shaft 1 supports a field magnet 9 held in a 'suitable member 8 which may be an enclosed plate with an annular flange around its periphery or it may have spokes or arms connecting the rim to a hub as shown in Fic. 2.` The, rotation of this permanent fielD magnet adjacent the heads of armature coil 7 that is supported by plate 6 induces periodic impulses in the coil 7. These are accentuated by reason of the interruptionof the primary windin by the arm 23 of breaker 4: disconnecting contact 24 at the proper moment by a cam 20 whenever it engages the breaker shoe 22. A condenser 5 is connected in parallel with the breaker contacts as usual. The -secondary 3 of coil 7 supplies one or more spark plugs 2 under the control of any, suitable distributor when applied to multicylinder engines.

ttempts have heretofore been made to' produce governors by using single lever devices but with unsatisfactory results because the movement of the cam 20 is inherently too great for a given movement of the governor weight 13, besides beats or pulsations are liable to be set up in a single lever that are not found in compound lever systems. At certain speeds and certain resonating conditions such beats will synchronizewith` the periods of cam engagement and thus modify the results vof the cam action, in some cases producing satisfactory results and in other apparently similar cases, producing entirely negative results.

In the form instanced in the drawing a governor arm 11 is pivoted at l2 toa support 10. This support is attached to the magnet carrier 8 and obviously rotates with it. A weight 13 may be slidable on arm 11 when a set screw 14 will hold it in any desired position, or it may be fastened permanently in duplicate devices after its correct place has been iiXed by actual tests or otherwise. The arm 11 has a spring 25 attached at -the end opposite to the weight 13 and any suitable limit stop may be provided adjacent this end or at any other point to limit the extent of the spring action.

The direct movement of the arm 11 is modiiied by the link 15 pivoted to the arm at 16 and to the cam lever 18 at 17. The other end of the curved cam lever 18 is pivoted at 21 to a projection 19 that extends out from support 10. Since thecam 2O is laced about midway of the length of the ever' 18it will beseen that the extent of movement of the"""link 15 will be reduced about one-half thus making a very sensitive device.

The action of the overnor is very simple indeed. As the weig t 13 moves away from ,the shaft 1 when the engine speed increases v or more strokes of the engine will be minus their mpelling impulses and the engine circuit will be absent and in consequence one speed will in consequence be lowered, until the cam 20 again moves outward sutliciently far to reengage the breaker shoe 22 when the ignition circuit will again become sufficiently active to fire the engine.

What I claim is,

l. In speed governors for internal combustionengines, a movable member, a stationary member, an ignition system, connections between the former and the latter, a spring actuated weighted arm carried by the movable member, a cam lever also carriedthereby and pivoted thereon at one end, a cam thereon, a connecting link attached to the free end of said lever and pivoted to the weighted arm near its fulcrum, a circuit breaker secured to the \stationary member, adjacent the path of travel of the cam, a circuit controlling shoe pivoted to the circuit breaker, and means for automatically moving the cam through the action of the weighted arm to cause the cam to not engage the shoe at certain changes in speed of the rotating member and to periodically re-A enga e said shoe at other speeds.

2. n speed governors for internal combustion engines, a rotating member, a pivoted projection, a stationary member on which said projection is pivoted, a plurality of interconnected levers carried by the rotating member, va spring attached to one of said levers the system of levers being adapted to have movement imparted thereto against the action of the spring through the travel of the rotating member, a projection from the lever system whose radius of travel at certain speeds will cause the same to engage the projection ot the stationary member and 4at other speeds to cause these projections to miss each other, and an ignition system controlled thereby.

3. A speed governor forv internal combustion engines including a compound lever system arranged to rotate about a fixed center,'said system comprlsing a pivoted and weighted arm, a spring attached thereto in opposition to the weight, a lever pivoted at one end, and a link connecting the lever and lever to the weighted arm, on the side of the pivot of the arml opposite the welght and a projection from such lever adapted to change its radial position unden variations of speed of the rotative member whereby a relatively large movement ,of .the weight produces reduced movement of the free end of the lever.

5. In speed governors for internal combustion engines a rotating member carrying a system of compound levers comprising an arm of the first and lever of the second order, both pivotally supported by the rotati'ng member, a weight at one side and a spring at the other side of the arm, a link connecting the free end of the lever to the arm between its pivot and the spring, and a tripping projection extending from the lever between its pivotal point and the link, whereby a maximum change of position of the weight againstthe tension of the spring due to the movement of the rotating member the tripping projection Will be moved' a minimum distance.

6. In speed governors for internal combustion engines, a rotating member carrying a system of compound levers comprising an arm pivoted between its ends, a lever pivoted at one end, a common support for both attached to the rotating member, a tripping projection on the lever between its pivot and free-end, a weight at one side and a spring at the other side of the pivotal point of the arm, and connecting meansbetween the arm and lever whereby the direction of travel of the weight against the tension of the spring under the movement of the rotating member is opposite to that of the tripping projection with respect to the center of rotation.

In testimony whereof I atix my signature.

J ULIUS A. ZUEHLKE.

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