US1257630A - Automatic spark-advancer. - Google Patents

Description

E. C. NEWTON.

' AUTOMATIC SPARK ADVANCE-IR.

APPLICATION FILED DEC.22. 1915.

1 ,257,630. Patented Feb. 26, 1918 2 SHEETS-SHEET 8 5 .1 WITNESSES: I I xgw' bn g I r fw WM E. c. uewmm.

AUTOMAHC SPARK ADVANCER.

APPLICATION FILED 0c.z2. m5.

1 ,257,630. Patented Feb. 26, 1918.

Z SHEETSSHEET Z.

'ITNESSES':

UNITED STATES PATENT OFFICE.

EDWARD c. NEWTON. F MABYSVILLE, CALIFORNIA.

nu'romnr'rc SPARK-ADVANCER.

Specification of Letters Patent.

Patented Feb. 26, 1916.

Application filed December 22, 1915. Serial No, 68,174.

To all whom it may concern:

Be it known that I, EDWARD C. NEWTON, a citizen of the United States, residin at Marysville, in the county of Yuba and tate of California, have invented new and useful Improvements in Automatic Spark-Advancers, of which the following is a. specification.

This invention relates to an automatic spark advancer, particularly adapted for use in connection with ignition systems on internal combustion engines.

The object of the present invention is to provide a simple, compact, automatically actuated advancing. device whichis so constructed thatit may be applied to or connected .with the spark controlling mechanism of practically any internal combustion engine,.-1n such a manner that the spark will be automatically advanced or retarded according to the speed of the engine. Furtherobjects will hereinafter appear.

, The inventionconsists of the construction and combinatlon of parts, as hereinafter more fully described andclaimed, having reference to the accompanying drawings, in.which Figure 1 is an end view and section taken on, line 1- -1, Fi a, showing the driven whee shaft, in a. retar ed osition and showing the'weights in a position to be driven clock- 2 -is a similar view showing the weig ts reversed in a position permitting an antl-clock-wise drive.

Fig.3-is'a cross sectionon'line 3-3,Fig. 1.

* Fig: 4 is a perspectiveview of the star Fig. is a'perspective ,view of one of the weihts."

Fig: 6 is a side elevation partly in section ofastandard Bosch magneto, showing the application of the invention.

Referring-to the drawings in detail, A indicatesa; disk in which is secured a plurality of stud bolts 2. .Pivotally mounted on the bolts, of which there are four in the present instance,- are weight members 3'. Each weight member is provided with an arm 4 which is adapted to'extend into a groove 5 formed in a star wheel 6. The disk A is able manner, but pre era-bly by means of secured upon a drivin" shaft 7 in any suit the clai np' coupling, indicated at 8, and the star wheel 6 is secured by means of a nut 9 on one end of a driven shaft 10. Forming a closure for the weights and the star wheel interposed bctwecn'same is a casing cover 11. This is adapted to be secured to the disk A by being screwed thereon, as at 12 or may be secured in any other manner.

The weights proper normally assume the position shown by full lines in Figs. 1 and as at 14 to receive the c0il-springs 13. I The outer ends of which enga c with the interior surface of-the cover 11,- w ile the inner ends 15 enga c with thebottom of the grooves 14.

The e ice as a whole is particularly constructed and adapted for use in connection with the ignition systems, such as are used on internal combustion engines. One application of the device, is shown in Fig. 6. A standard Bosch magneto here shown directly'connected with the pump or cam shaft 7 of the engine. Two automatic advancers are here shown as interposed between the driving shaft and the magneto shaft 17, the object of which will hereinafter be described.

In operation with the'automatic advancen interposed between. the driving shaft and the armature shaft, it will be seen that as the speed increases, an advance of the driven shaft =with relation to the driving shaft takes place' the centrifu a1 action causedby the revolution of the device as a' whole causes the weights to swing about their pivot pins 2 in an outward direction. This move.-

' ment causes the arms 4 to,move in the direction of the arrows,-(see Fig. 2) until the extreme movement is reached, such as. shown arms 4 with the radially disposed slots 5 in the star wheel causes-this with connected shaft 10, which in this instance is the arms ture shaft to advance ahead of the driving shaft; the amount of the advance depending .entirely upon the speed of the engine an bydotted lines at 18. Engagement of the 4 matically advanced and retarded with re--,

' efliciency which'cannot possibly the tension of the coil-springs. The posi armature shaft and will, therefore, advance in unison with same when the automatic advancer moves the armature shaft ahead of the driving shaft. The spark is thus autolation to the crank shaft and piston in the engine, and a perfect control is obtained without any sklll or attention onithe part of the operator. The two advancers shown in Fig. 6 are provided for the purpose of permittin the armature shaft to advance a considera' le distance ahead of the driver.

This is of considerable importance when using high speed engines, as it is often necessary to advance beyond sixtydegrees. The weights in one advancer are in this instance lighter than in the other, thus permitting one to advance its limit before the other operates. This view also shows the possibility of building the advancer in such a manner that it may 'be inclosed in themagneto housing, thus forming a direct connection and complete unit.

The application of an automatic advancer of the character described in connection with a. spark control mechanis'mis a great advantage in'many ways.

First :An automatic advance of the-- spark which is in accordance with the speed of the engine, thus insuring a hi h point of e obtained by'a'manual advance of the spa k.

Second :It reduces all danger of a kickback in crankinga motor as the automatic the spark when the when the engine is again started. Back-fire isthus impossible.

Third :--It insures a much higher engine efficiency and saving of fuel, as a hotter spark and-more perfect combustion is obtained.

Fourth :It forms an ideal coupling between thedrivingand driven parts which not oiily permits xibility between the two, but also operates with an'equal efliciency whether: the shafts are in directilinement ornot. v

.The device constructed as here shown is simple and compact in construction, it permits a much greateradvance ofthe spark use than any other device heretofore constructed and is automatic inoperation and so simple that no adjustment' orattention is required at any time. h

The device s a whole is easily asembled' and taken. apart, as it is only necessary tov -vice as a wholehaving a central groove opening, a

of. disk. secured thereon,

mounting the weights in move the casing 13 to disasemble the def .mann'er permitting the position of the weights to be reversed to permit clock-wise or anti-clock-wise movement of the advancer. v

The materials and finish of the several parts of the device may otherwise be such as the judgment and experience of the manu-" facturer may dictate.

I wish it understood that various changes in 'form, proportions and minor details of construction may be resorted to within the not wish to limit myself to the specific de-' scope of the appended claims and that I do si n and construction here shown.

aving thus described my invention, what I claim and desire to secure by Letters Patcut is v a p 1. In combination, a pair of alinedshafts, and means coupling the shafts comprisin a member fixed on one shaft and extending literally therefrom, a governor weight pivotally carried by the other shaft and having ivotal connection with said member, the

atter having a seat for the weight'in normag osition, and means tending to return an member.. 1

casing fixed on one shaft a member fixed on the other shaft and extending laterally there from within the casing, agovernorweight and a. transverse pin passing through the opening old the weight to its seat on said 2.' In combination, a pair of alined shafts, f

and means coupling the shafts comprising ano nings. This is for the P 'P of -the weight and plvotally securing the latter to the casin said weight having pivotal connfic'tion wit said later-all th mem er, and a spring arran d in e groove ofthe weight and'coiled abiixt the pin with one terminaLbearing outwardly against the casing for'urging the weight to normal position.

3. The combination with. a driving shaft, adriven shaft, a wheel secured on'said shaft, a plurality of reversible governor weigh their normal and reversed positions on thedisk, an arm'on each governor weight .forming a ivotal' driving connection between each weig tand the wheel both positions of said weight, ands spring for returning each governor weight against the wheel.

1 4. In an apparatus of the'chara cter d'e- 5 power shaft and a magneto armature shaft xtending 1 1 0 to the magneto shaft andhavingalternato .190

segmental channels and seats formed in its peripheral edge, weights pivoted upon studs carried by the driving shaft and exterior to the star wheel, said weights normally engaging in their seats on the wheel and having lugs engaging the star Wheel channels and acting centrifugally to cause the armature shaft to advance with the revolution of the driving shaft, and springs pressing upon the weights to return them to their seats and the armature shaft to normal relation with the power shaft.

5. The combination with a driving shaft, an alincd pair of driven shafts, coupling means between the driven shafts, and other coupling means between the driving shaft and a driven shaft, each coupling means be ing operable through centrifugal action for rotating one shaft relative to the other, and one coupling means being more sensitive to centrifugal fo ce than the other coupling means whereby the more sensitive means will operate preliminary to the less sensitive means.

6. The combination with a driving shaft, an alined pair of driven shafts, coupling means between the driven shafts, and other coupling means between the driving shaft and a driven shaft, each coupling means being acted upon by centrifugal force to relatively rotate the connected shafts, and one of said coupling means requiring a higher other to effect its connected speed of rotation than the relative rotation between shafts.

In testimony whereof. I have hereunto set my hand in the presence of two subscribing witnesses.

EDWA R-D (J. NEWTON.

Witnesses Joim H. l-lnmnuo,

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