US1284471A - Automatic spark control for internal-combustion engines. - Google Patents

Description

F. SCHMIDJ I AUTOMATIC SPARK CONTROL FOR INTERNAL,COIJIBUSTION'ENGINESI APPLICATION FILED FEB. 28.1917.

Patenmd N0v.12,1918

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Application ler February 2B, 191?.

To ou whom t may concern t Be it known that L FRANK V. Scrutin. a citizen ot' the United States, residing at Humphrey, in the 'county of Platte and State of Nebraska, have invented certain new and useful -Improvements iniiutomatic Spark Controls tor tnternal- Combnstion Engines, ot' which the following is a specilication.

This invention relates to improvements in internal combustion engines, and more particularly 'to a device tor autonnaticallyY controlling the spark ot such engines, and which is especially designed tor nse in connection with automobiles.

The main object of the in vention is to provvide a simple and etlicient device ot this character which may be attached to anv make ot car` new or old, andvby the nscet which the magneto ma)Y be set to spark cxactlv at the point where the strongest current is flowing and which produces the spark exactly atl the right instant during the stroke. of the piston thus securing the greatest power trom the liast fuel.

lVith the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the conn bination and arrangement ot' parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment. ot' the invention herein disclosed may be made within the scope ot what. is claimed without departing from the spirit of the invention.

`ln the accompanying drawings:

Figure 1 represents a Side elevation ot this improved device shown applied, f

Fig. 2 is a similar View on an enlarged scale showing the device constituting the invention with the engine and magnetoy omitted.

Fi g. 3 is a longitudinal section thereof,

Fig. 4 is a transverse section taken on the line 4 4 of Fig. 2,

Fig. 5 is a similar view taken on the line 5 of Fig. 2,

Fig; 6 is a detail perspective view of the shaft connecting sleeve constituting a part of this invention, and

Fig. 7 is a similar view showing the two shaft sections in connection with which this improvement is used.

In the embodiment illustrated, the device constituting this invention isA shown applied 'to a magneto driving shaft termed in two Specification of Letters Patent.

Patented Nov. ft2, tm.

semi Meinem.

vsections fi and 2. the section l being conected to the magneto indicated at in Fic. l and section driven by "'l e engine li. .i sleeve i connects these sli-att se'tions -ind is engaged therewith hv means oi stads l on vthe shaft sections and spiral slots 5 in the sleeve. rl`wo of these slots 5 open inwardlj; trom each end of the sleeve at dia mctricallf' opposite pointsI and curve in oppositc directions. 'these slots` are 'l'dablv engaged with the studs la two olf wi ter are carried bv each' shaft section ai' die metricallv opposite points spaced 'from the. outer ends ot the .sections (see Figs. 3 and 7). rl`he sleeve 3 is exteriorlv threaded :t its opposite ends to receive collars G and T., the' collar 7 having an annular `rroove S in its periplieri1 in which operate extensions 9 ot screws itl carried b v n kgovernor ring' 1l. Three ot these screws are here shown (see Fig. l). but it is to be understood that-an): desired mnnber ma): be employed. The other govermir ring' l2 is liked rigidl)v to the shaft section l b v a set screw i3 as is shown clearly in Figs. '2 and 'i.

The nsnal ii'overnor springs lficonnect the rings l] and l2 and earrvthereon weights l5 which nav be arranged on either side ot' said springs. being; here shown on the outer sides thereot.

ln the toi-mot the invention here shown, the sleeve 3 is mounted on the shaft of a. magneto which runs clockwise and in the,

operation ol: the device it wih be understood that when the engine l has been started and the. speed increased sntlicientlv. the governor weights l5 will tlv outward and bv means ot thc engagement ot the collar 1l with sleeve. .il will move said sleeve to the right so that. the revolution of shaft section 2 will be increased as compared to that ot the shaft l, and since the contact breaker` not shown, which controls the spark is placed directly on this shaft section 2 it follows that the spark will be correspondingly advanced. and when the engine slows down and the ring 1l moves outward the spark will be correspondinglv retarded. It is to be understood. that the spark could be manually controlled bv this device bv substituting a hand lever tor the governor ring ll. the said lever to operate in the groove 8 ot collar 7 so that en the shifting of the sleeve toward the niagneto, the spark will he retarded and by moving it in the opposite direction from( the magneto it will hev advanced.

In the embodiment illustrated as before stated, the device is shown applied to a magneto revolving clockwise but it is to be understood that it may be applied toV one revolving anti-clockwise by simply removing the collars 6 and 7, withdrawing the shaft sections and reversing the position of the sloei e 3. l

From the above description it will be understood that where a device has been once supplied and connected with a governor ring in the manner above described no further attention' is required on the part of the operator, the speed of the engine operating to control sleeve 3, shifting it toward or away from the magneto and thereby retarding or advancing the spark to-meet the requirements of the engine so that the spark will occur at exactly the right instant of the piston stroke and thereby obtain a maximum amount of power with a minimum consumption of fuel.

From the foregoing description, taken in connection with the accompanying drawings, the advantages of the construction and of the method of operation will be readily apparent to those skilledlin the art to which the invention appertains and while l have described the principle of operation of the invention together with the device which I now consider to be the best embodiment thereof. I desire to have it understood that the device shown is merely illustrative and that such changes may be made as are Within the scope of the claimed invention.

I claim:-

The combination with a magneto driving shaft composed of two sections, each having a pair of studs projecting laterally therefrom at diametrically opposite points; of a sleeve encompassing said sections and provided at each end with a pair of longitudinally extending spiral slots opening through the ends of said sleeve and extending in opposite directions and adapted to be engaged with the studs on said shaft sections, the slots in one end extending toward those in the other end, and similarly curved, collars removably mounted on the ends of said sleeve, one of said collars having an annular peripheral groove` a pair of governor rings, one of which is fixed to one shaft section and the other loosely encircling said grooved collar, said last-mentioned ringihaving projections on vits inner Jface loosely engaging the groove of said collar,v springs connecting said rings, and weights carried byy said springs whereby the sliding of the sleeve is controlled by the speed of the engine to retard or advance the spark.

In testimony whereoic I ai'ix my signature in presence of two witnesses.

FRANK V. SCHMID.

Witnesses:

EDD' HASSMANN,

BERNARD GJLSDORF.'

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