USRE14134E - harry randolph van dev enter - Google Patents

Description

H. R. VAN DEVENTER.

IGNITER MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR.13, I916.

4 Reissued May16,1916. 14,134.

wumullllllllln [I I, i 23 UNITED STATES PATENT OFFICE.

. HARRYRANDOLPH VAN DEVENTER, or SUMTER, son'rn canons; ASSIGNOR, BY

MESNE ASSIGNMENTS, TO SPLITDORF ELECTRICAL COMPANY. OF NEWARK, NEW JERSEYQA CORPORATION OF NEW JERSEX IGNITER MECHANISM FOR INTERNAL-COMBUSTION ENGINES.

Specification of Reissued Letters Patent. Rei u fl )[ay 16, 1916, Original 170. 1,176,502, dated March 21, 1916. Serial no. 878,933. Application for reissue. filed April 13,

1916. Serial No. 91,581.

and Stat'e of South Carolina, have invented certain new and useful Improvements in Igniter Mechanism for lnternal-Combustion Engines, of which the following is a specification, reference being had to the accompanying drawing.

hfy invention relates to ignition apparatus for internal combustion engines and has for its purpose the provision of a compact and .eificient ignition unit, self-contained and mounted upon or in close association with the ign'iter proper of the engine.

Briefly stated the invention comprisesa frame adapted to be mounted on or near the engine cylinder and carrying an igniter which is so positioned as to project into the ignition chamber of the engine when'the frame is mounted. The frame also carries bearing surfaces, one within the' other. for

the gniter operating shaft and trip lever res ectively, these hearings being carried by the frame independently .of each other. The advantage of this arrangement of the bearings is -that the lateral and axial strains put upon the trip lever by the operating forces are confined to-it. The frame also carries a racket on which the magneto .is supported as well as extensions or arms with projecting posts for mounting the various operatingparts. The trip lever and the operatingshafts of the magneto and igniter are so positioned in relation to each other that a. pure tangential or rotary motion only is transmitted from the operating lever to the different shafts. the various strains tending to produce other motion being confined to the trip lever.

Various means may be made use of for operating the trip lever-and other parts, a specific means being shown and described in tln accoinpa "ing specification by way of cx...;- le.

My invention is illustrated in the accompanying drawings in which:

Figure 1 is a plan view of my ignition unit applied to the cylinder wall shown in section. Fig. l is a. front elevation of the samewith the magneto removed. Fig. 3 is a fragmentary view similar to Fig. 1 but of a modified form.

In the drawings. 1 indicates a, wall of the enginecvlinder, which may be of any stand ard or desired type to which this general type of ignition apparatus is applicable.

2 indicates the body of anigniter which enters the cylinder through an opening in the wall 1. r

indicates the movable electrode of the igniter cooperating with a fixed electrode 4-. carried on the body. The electrode- 3 is 'monnted on a shaft 5 which extends through the body 2. for ope'ation by mechanism external to the cylinder.

Secured to the body 2 is a bracket 7 projecting from the engine cylinder in a plane parallel to the axis of the i'gniter, and preferably horizontal. Integral with this bracket, and also with the igniter body 2-, is a plate or flange (5 carrying arms 8 and 9 upon which are mounted posts or studs 10 and 11, serving as fixed anchorages for the outer ends of the'operating springs 12 and 13. A hollow: stub shaft l0 projects outwardly from the flange 6 and surrounds the ignitedshaft 5. Mounted upon this stub shaft 40, and adapted to oscillate freely thereon is an actuator or trip lever lit with an upwardly projecting finger ,15 in the path of reciprocating travel of a push rod 16 which when the engine running is moved back and forth as indicated by the double headed arrow in Fig. 2. This reciprocating motion may be imparted to the push rod by a. crank or cam or other device driven by the engine in a: manner which will be well understood by those skilled in the art. The engagement of the parts 15 and 1G is adapted to be controlled by two other independent elements. the first being an eccentric 17 mounted on a fixed shaft 12% and rotatable by means of a. handle 19: and the second element being the bell crank lover 2021. whose arm 20 lifts the push rod 16 so that it cannot engage the linger lfhavhon the arm :51 is forced to the left as indicated in dotted lines in Fig. l. by a pin. or stud 1:13

Elli

rod 16 with the finger 15, and thereby the exact point in the stroke of the push rod at which it will 'sli p over the point of the finger 15 and permit the actuator to be snapped back by the springs. The function of .the bell crank lever 2021 is to disengage the push rod entirely and prevent actuation of the trip lever let on the exhaust stroke. This of course is particularly applicableto a hit-and-miss engine. 1

The electrodes 3 and 4 are normally maintained in engagement by means of a helical spring 24: (see Fig. 1) having one end attached to the flange or frame 6 and the other end attached to the electrode shaft 5. The opening of the electrodes is accomplished by means of a dog '25 rigidly fixed on the electrode shaft and carrying a screw tappet 26, engaged from beneath by a stud 27 carried on the actuator or trip lever ll.

This stud serves also for the attachment of the spring 12, each end of the actuator being slotted to receive the eye on the end ofa spring. A pin 28 at the opposite end of the actuator 1 from the stud 27 receives and holds the eye on the end of the spring 13, and the parts a re so proportioned that when the actuator is in the position shown in Fig. 2, that is to say in the normal non-firing position, its axis w'ill approximately coincide with the axes of the spring helices, the springs being under sufiicient tension to maintain this position.

Outside of the actuator, a magneto machine 31 is mounted on the bracket 7 this machine being shown in plan in Fig. 1, but being removed in Fig. 2 and the bracket shown in section. in order to expose the operating parts. This magneto, as already stated, may be of any stated type or structure provided it has a rotor or oscillator capable of producing a spark as required by the igniter. I do not herein claim any specific means for attaching the rotor or oscillator of this magneto to the other parts,

and particularly to the actuator, but I haveindicated a connection at 39/ in Fig. 1 between the shaft of the magneto and the actuator 1-1, which it will be remembered is free to oscillate on the shaft 40 sm rounding the shaft The connection thus indicated may be by means of screws, or a combina tion collar, or any desired type of coupling or connection, many devices suitable for this purpose being well known in the art, and one of them, a detachable pin and slot crank coupling being described and illustrated in my prior application Serial No. 878,196, filed December ll-L 1914-. V

Referring to the modification shown in Fig. 3 the bearing of the trip lever is in the form of a short post or stub bearing 40 carried by the trip lever and cooperating with a bore in the flange (3, the stub shaft being locked In the bore in any Well known manner, which is not here shown. The igniter operating shaft 5 extends through a shown the bearings for the igniter shaft and trip lever while substantially in alinement and one Within the other, are independently supported by the frame, whereby only a tangential or rotary motion is transmitted from the trip lever to the different operating shafts and all lateral and axial strains produced by the operating forces are confined to the trip lever.

While I have set forth herein a preferred specific form of my invention, it is to be understood that ,I do not limit myself to such a specific form but contemplate all other modifications as fall within the scope of the appended claims.

Having thus described my invention, What It is obvious that the I claim and desire to secure by Letters Patent is:

1. An ignition mechanism for internal combustion engines comprising a frame, an igniter and a magneto carried by said frame, an operating shaft for each of said igniter and magneto, a bearing for the igniter shaft, a bearing carried by said frame surrounding the said igniter shaft bearing, a trip lever carried by said bearing independently of the igniter shaft andmeans for transmitting motion from the trip lever to both of said igniter and magneto shafts.

2. An ignition mechanism for internal combustion engines comprising a frame, an igniter and a magneto carried by said frame, an operating shaft for each of said igniter and magneto, a hollow stub'shaft carried by the frameindependently of said other shafts and surrounding said igniter operating shaft, a trip lever loosely mounted on the stub shaft and means for transmitting motion from said trip lever to both of said igniter and magneto shafts.

An ignition. mechanism for internal combustion engines comprising a frame, an igniter and a magneto carried by said frame, an operating shaft for eachv of said igniter and magneto, a bearing for the igniter shaft, a bearing carried by said frame surrounding the said igniter shaft bearing, a trip lever mrriedby said bearing independently of the igniter shaft, means for transmitting the entire rotary movement of the trip lever transmitting a portion of said rotary move ment to the igniter shaft.

4. An ignition mechanism for internal combustion engines comprising a frame, an igniter and amagneto carried by said frame, an operating shaft for each of said igniter and magneto, a bearing for the igniter shaft, a bearing carried by said frame surrounding the said igniter shaftfbearing, a triplever carried by said'bearing independently of the igniter shaft, tension means tending normally to hold the trip lever in a given position, other tension means tending normally tohold the igniter shaft in a given position, means for rotating saidtrip lever through a predetermined angular distanceagainst the force of its associated tension means and then trip or release the lever which suddenly returns to the said given position under force of its tension means and means for transmitting motion from'the' trip lever to both of said igniter and magneto shafts.

5. An ignition mechanism for internal combustion engines comprising a frame, an

, igniter anda magneto carried by said frame, a trip lever-,-"a bearlng for each of said ig ni te1 shaft and trip lever carried by the frame independent of and concentric to each other and means for transmitting motion from tl'ie-etrifi lever to both of said igniter and magneto shafts.

6. An lgnitron mechanism. for I internal combustion. engines comprising a, frame adapted to-be mounted' on an'en'gine, an

igniter body carried by the frame in such mannerasto be positioned within the ignic'opiel of this patent may be obtained for five cents each, byaddressing the "Commissioner of Patenh, v V

. Washington, D. G."

tion chamber of the engine, outer and inner circular bearing surfaces carried by said frame, the elements of .said inner bearing surface being all within the elements of said outer bearing surface,a bracket carried by the frame extending oppositely from the igniter body, arms carried by the frame extending laterally of'said bearings, -a plurality of posts carried by said arms and'extending the efrom opposite of theigniter body, a magneto mounted on thebracket ,with its operating shaft substantially in alinement with the said bearings, an igniter device carried-by the igniter body and positioned within the fi; ng chamber of the engine,'an operating shaftfor the igniter device c'arried by the inner one of said bearings, atrip lever carried by the outer vone of saidbearings independently of the;

by the force of" the tension means and means for transmitting motion from the tripl'ever to both the magneto operating shaft and the igniter operating shaft.

In testimony whereof I hereunto affix mysignature in the presence of two Witnesses.

HARRY RANDOLPH VAN DEVEN'IER.

Witnesses:

EDNA B1 ISLER, 'E. H. RHAME.

Images