US894775A - Sparking device for explosive-engines. - Google Patents

Description

'No. 8%,775. Y PATENTED- JULY 28,1908. C. R. GREUTER.

'SPARKING DEVICE FOR EXPLOSIVE ENGINES.

- 2 SHIBETSSHBBT 1;

APPLICATION FILED APB-25,1907.

13mm cone atto'amug T 0 all whom it may concern:

UNITED STATES PATENT OFFICE.

CHARLES R. GREUTER, OF WILKES-BARBIE, PENNSYLVANIA, ASSIGNOR TO MATHESON MOTOR OAR COMPANY, OF WILKES-BARBIE, PENNSYLVANIA, A CORPORATION.

SPARRING- DEVICE FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented July 28, 1908.

Application filed April 25, 1907. Serial No. 370,276.

Be it known that I, CHARLES R. GREUTER, a citizen of the United States of America, residing at Wilkes Barre, Pennsylvania, have invented new and useful Im rovementsin Sparking Devices for Exp osive- Engines, of which the following is a specification.

This invention relates to s arking devices for explosive engines, particu arly of the type which produce a spark by the making and breaking of the electric circuit in contradistinction to the jump spark class of sparkers.

To this end the invention contemplates certain novel and practical improvements in a make and break sparking device involving what is known in the art as ahammer action, and having in view, as a s ecial object, the provision of means for re ieving the main presser spring from strain, while at the same time keeping the mechanism in perfect'time, and continuing to do so until the wear is equal to the play provided for betweencertain parts of the device. Also the invent-ion has in vlew an improved means whereby the time of contact between the two electrodes,

11128 be advanced or retarded.

ther objects will readily appear to those familiar with the art as zhe nature of the invention is better unders ood.

In the accompanying drawings, showing a preferable embodiment of the invention, Figure 1 is a side elevation of the cylinder head portion of an internal combustion engine, showing the same equipped with a make and break sparking device constructed in accordance with the present invention. Fig. 2 is an end view showing the general relation of parts cooperating with the-sparking device.

ig. 3 is a sectional elevation of the upper part of the "cylinder and the attached sparkmg devices. Fig. 4 is a detail sectional view showing more clearly the mounting and relation of the fixed and movable electrodes, (the sparking hammer and anvil). Fig. 5 is a detail sectional'view on the line 5-5 of like reference characters designate corresponding parts in the several figures of the invention. v

In the embodiment of the invention shown in the drawings, the numeral 1 designates the cylinder of an internal combustion motor, within the up or end of which is located a fixed insulate electrode 2 having a stem bushing or plug 5 fitted in the cylinder wall. The outer endof the stem port-ion 3 of the fixed electrode 2 is designed to have a suitable wire. connection therewith which extends to one pole of a battery or other source of electrical energy, the other )ole of which battery is connected to a part 0 the cylinder, the whole being arranged in the manner Well known in this art.

The movable electrode consists of an arm 6 fixed on the inner end of a rock shaft 7 extending through a suitable bushing 8 located in the wall of the cylinder, and carrying 11 on its outer end fportion a loose operating 00 lar 9 capable 0 an independent slidin and limited rotative movement on the sai electrode rock shaft 7.

The loose operating collar or hammer 9 is provided at one side thereof with a grooved ub portion 10 loosely engaged by the stud or pm 11 carried atone end of a swinging shifter arm 12 mounted on a suitably supported adjusting shaft 13 which latter has rotated at the ratio of one revolution to two.

of the crank, as is usual in explosive engines of the four cycle type.

It will also be understood that in a mul tiple cylinder engine the cam shaft 17 carries a plurality of operating cams 16, each of which cooperates with a sparking device, but as this is well understood in the art, a description of one s arking device-and its operating means .wil suffice to give a proper understanding of the invention.

The. main presser spring 15 consists of a short stiff spring provided at its cam engaged end with a wear'block or head 18, over which wipes the operative ortion of the; cam 16, and the free end oft c said spring or spring arm 15 is secured fast by means of the screws or equivalent fastenings 19 on the flat supporting side 20 rovided at one side of the body portion-of t e operating collar or hammer 9.

In conjunction with the main presser spring 15, a distinctive feature of the present invention resides in the employment of a relief spring 21 encircling the collar or hammer 9 and secured fast at one end thereto, preferably by means of the fastenings 19. The ring '21 is of U form and the movable end t iereof, as at 22, is pivotally connected to one end of a connecting link 23 the short end of which link loosely receives a coupling in or anvil 23 projecting through the perfbrated keeper ears 24 formed. on the operating collar 9. The holes through the ears 24 are larger than the 'diameter of the pin or anvil 23 so as to permit of a limited rotary play for the collar or hammer 9 independent of the fast shaft collar 25 secured fast on the shaft 7 between the collar or hammer 9 and the cylinder head. The said collar 25 is pro vided'at one side of the shaft with a strike projection 26 adapted to be engagedby a taplpet 27 onv a suitably operated longitudina y movable starting shaft 28, to which latter part, however, no claim is made herein. The upper end of the collar 25-above the rock shaft is provided with a holding pin 29 to whichare connected one end-of the oppositely arranged equalizing springs 30 and 31 having fixed points of attachment on the engine the cam 16 engages the spring 15 and swings J the same to the right, (accordin to the position shown. in F1g. 1), the movable electrode is carried against the fixed electrode, which movement will take place under the increasing tension of the spring 15, the throw of the cam 16 being such that-the s ring 15 will not run off of the cam. until a ter contact between the electrodes has. been made,-thus flexing more or less the spring or spring arm 15 before it leaves the cam. WVhen this takes place,-the s ring 30 will sharply contract the arm so t l iat its momentum carries it past the vertical, whereupon the spring 31 asserts itself with the result that the movable electrode will continue to vibrate with greatly diminishing frequency and through a greatly diminishing arc, till the action of the springs is equalized, and during the contmuanee of. the vibrating movement the spark will be maintained.

latitude of adjustmentand takes the strain off of the spring 15. As the result, the mechanism can be set so that the electrode 6 It will-also be' .noted that the relief spring 21 permits of a will engage electrode 2 a little in advance of the time that it would otherwise be permitted, and the relief spring will leave the presser spring and yet keep the mechanism in perfect time and continue to do so until the wear is equal to the play between the fast and loose collars.

I claim:

1. A sparking device coi'nprising a fixed and a movable electrode, a resilient spring connected to the movable electrode, oppositely disposed yielding members acting to hold the movable electrode normally out of contact with the fixed electrode, a cam located in operative relation to said spring, and means for shifting said spring to vary the timeof contact of the cam therewith.

2. In a sparking device, the combimition with fixed and movable electrodes, a collar rigidly connected with the movable electrode, oppositely disposed yielding members between which said collar is held whereby said movable electrode is held out of contact with the fixed electrode, a spring member operatively connected with said collar, :1 can] located in o erative relation to said spring member, anr means for shifting said spring member to vary the time of contact of the cam therefor.

3. In a sparking device, the combination with fixed and movable electrodes, of a rock shaft carrying the movable electrode, a fixed shaft collar mounted on the rock shaft and having yielding spring connections with the engine, a coupling pin, a loose operating collar mounted on the rock shaft, and loosely receiving the coupling pin so as to have :1 limited play thereon, a cam engaged main presser spring carried by the loose collar and a relief spring also carried by the loose collar and having a self-adjusting connection with the coupling pin.

4. In a sparking device, the combination with the fixed and movable electrodes, a fast collar on the shaft having yielding spring connections with the engine and provided -with a laterally projecting cou )ling pin, a

loose operating collar longitudinally shiftable on the shaft and loosely receiving said pin so as to have a limited play thereon, a main cam engaged presser spring carried by the loose collar, a relief spring encircling the loose collar and' connected at one end there to, the other. end of said spring having a loose link connection with said cou ling pin,

and means for shifting the loose co ar.

In testimony whereof, I have signed my name to this specification in the presenceof two subscribing witnesses, this llth day of April 1907.

' CHARLES R. .GREUTER. W'itnesses:

G. W. lvlA'r'nnson', Mann Ig- MATHESON.

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