US1308235A - Ignition mechanism for ins brnal-combustion engines - Google Patents

Description

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` HARRY F. GEIsT, on RACINE, WISCONSIN,` AssIGNon, 'BY MESNE AssIeN'ME-Nrs, se

WEBSTER ELECTRIC COMPANY, or RACINE, WISCONSIN, A CORPORATION or j WISCONSIN.

IGNITION MECHANISM FOR IN'IllRNAL-COMBSTION ENGINES.

specification or Letters Patent.

' Application filed. September 20, 1915. Serial No.51,;632.

To all whom, t may concern.'

Be it known that I, HARRY F. Gfnrs'r, a citizen of the United States, residing at Racine, in the'county of Racine and `State of Wisconsln have inventeda certainvnew and' useful Improvement in Ignition Mechanism for Internal-Combustion Engines, of which the following is a full, clear, concise, and

exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to ignition mechanism for internal combustion'engines, and particularly to that type of. ignition mechanism. wherein a magneto arranged to be driven by an associated engine is so connected and related to make and break contact mechanism located Within the combustion chamber of the engine as to ei'ect the operation of the'electrodes forming a part of the contact mechanism and thus accomplish the passing of an electric spark at the proper instant inthe cycleof engine operation.

The object of my present invention is to provide an ignition mechanism of this class that is capable of being economically manufactured, one wherein the 'operation of the make and break devices as Well as the magneto rotor are positively and properly effected. Simplicity of construction is an essential feature of my present invention.

My invention is explained in detail in the following description wher/ein reference is made to the accompanying drawings, in which Figure l is a view, partly in section and partly in elevation, illustrating the improved mechanism of my invention;

Fig. 2 is a view taken on the line 2--2 of Fig'. 1 looking in the direction indicatedfby Similar characters of reference 'refertov similar figures throughout the several views.

Referring first to Fig. 1, I have illustrated' at (5 a bracket arranged to lbe secured to the wall of an associated internal combustion engine by bolts or other similar instrumentalities passing .through apertures 7-7 formed in the plate 8 which is integral with the aforesaid bracket 6. The bracket 6 cornprises; a horizontal shelf 9 upon which is mounted a magneto generator 10 which may be of any approved type; that is, either of collar 14 keyed upon a shaft 15 extendingA through the bracket 6 to the wall of the associated internal combustion engine cylinder. The Wall of the engine cylinder has been diagrammatically illustrated by dotted lines at 16. The collar 14: previously referred to is provided with a pair of diametrically lopposite arms 17-17-,each ofwhich isconnected bracket 6 and yit Will thus be seen that the y springs 18-18 normally serve to retain the magneto rotor andthe shaft l5 in the positions illustrated in Figs. 1 and 2. Carried Aby the left'hand end ofthe shaft 15 (Fig. l)

" plurality of sleeves of metal andinsulating material and which unit bears in the bracket 6. The aforesaid unit comprises a metal sleeve 21 around which is disposed a sleeve 22 of insulating material'. Disposed around the insulating sleeve.22 is a sleeve 23 of conducting metal which at the left hand end thereof' (Fig. 1) is provided with an arm 24.

carrying an elect-rode 24a which is disposed in immediate proximity to but vnormally out of engagement with the electrode 20a, as clearly illustrated in Fig. 3. The sleeve of insulating material serves to insulate the sleeve 23 from the bracket (3 and the Wall of the engine ycylinder and another sleeve 26 is provided vfor the purpose of bearing against the Walls of the bracket 6. It will be understood that'tlre several sleeves disposed around the shaft 15 constitute one unit as before stated and that these sleeves rotate together. I may 'state at tliispoint that the electrode 20"*L is what nxayibe termed the grounded electrode being 'grounded to the bracket through the springs 18-18, or by special conductors, if desired, and that the elect-rode 21E* is thc Patented July 1, 1919.

' the Wound rotor type or of the unwound ro- -by a spring 18 with an extension 1Q-of the insulated electrode and'is connected in the magnetofcircuit by a conductor connected withfa suitable clip 27 which is in electrical engagement with the sleeve, 23,' as illustrated in Fig. 1. Formed integral with the right hand end of the'sleeve 26 fl-Jig. 1) is a depending arm 28 provided :t its lower end with an adJustable screw 29 normally vengaging a lug 3() carried by the shelf of the bracket 6. A spring 31 acting between the arm 28 andthe bracket 6 normally serves to retain the arm 28 and parts connected thereto in the positions illustrated in Figs. 1 and 2. l

' The colla.' 14 which iswlisposed upon the right hand end of the shaft 15 (Fig. l.) is provided with a trip finger 32 arranged to be driven by an engine driven actuator, as, for instance, a reciprocating rod to move the shaft 15 and parts connected therewith,

against the tension of the springs H18--18 and then release the inger,fwhe1'eupon all of the parts connected with the collar 1l in- 'cluding the shaft 15 and the magneto rotor shaft, are returned to normal position. The

` generalconstruction and mode of operation of engine driven actuators of the Ytype men- I tioned are commonlyknown and, therefore,

I have thought it unnecessary to illustrate such a device in the present disclosure.

The mode of operation of the magneto just-described is as follows;

' The trip or push finger 32 is moved in a contraclockwise direction (Fig. 2) against the action of the springs 18-18 thereby moving the magneto rotor and the electrode 202l inasmuch as both of these parts are me? chanically connected with the pushfor trip finger. `When the electrode 20a is so moved, it is brought into engagement with the electrode 24a inasmuch as the electrode-24% is disposed in the path of the' electrode 20a.

After the electrode .20zt engages its associatedelectrode 24a and continues to move under the-action of the engine driven actuator, it lcarries the electrode.-24a with it against the action of the spring 31, whichnormally tends to hold the electrode 24a in the position illustrated in' Figs. l and 3. Wheny the' trip finger 32is released Vfrom the engine driven actuator, the springs 18-18 serve .to quickly move vthe electrode 20a and the `rotor of the magneto toward their normal positions and the spring B1 returns the electrode 24a toward its normalposition. The electrodes 20a and 243L remain in engagement with each otheruntil the screw 28 cornes into engagement with the lug 30 (Fig. 2). When this occurs, further movement of theelectrode 24a is prevented and separationl of, the electrodes occurs. Itwill be understood that the adjustment of the several parts is such that separation of the electrodes occurs at the instant when the peak of the current wave induced within the magneto windings is attained.. This operation is repeated to produce a spark at the proper instant`- in each cycle of the internal combustion engine to accomplish the necessary ignition. ofthe charge in a well known manner.

Attention is directed to the fact that the nlagneto .of my invention hereinbefore de- 1cribed is removably mounted upon its associated supporting bracket 'and that the igniframework lhaving the rotor thereof dei..

tachablyiconnected with said shaft, means connected with the shaft arranged tol be engaged by an engine driven member to oscillate the shaft and rotor together' with spring means positively connected. with said Lshaft whereby said shaft is-incapableof movement except in opposition to said spring means,"said spring means arranged quickly to return the shaft and parts connected therewith to normal to effect the operation 'of the electrodes and generate a current in the magneto when the shaft is oscillated by the engine driven member and released.

'-2. Amagneto ignite'r mechanism comprising a plug, a pair of make and break elec-l trodes, a shaft yextendingthrough said plug having one'of said electrodes carried'on the inner end thereof, a' yoke carried by the outer endof said,shaft, fixed with respect thereto, andv incapable of movement inde# -pendently thereof, spring means acting between said yoke and amember fixed' with respect to said plug,- together with means y for moving said yoke and shaft' in oppositionto-said spring means,4v and ,for 4tripping said l yoke `and.l shaft, and means for detachably connecting said shaft withthe .rotor of a magneto generator..

In witness whereof, I hereunto 'subscribe my name' this 18th day of September, A. D..

l y HARRY F. saisir.. llVitness/es:

' A.' G.. Moonen, C.VANGE.

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