US731134A - Electrical igniter for explosive-engines. - Google Patents

Description

-No. 731,134. l PATENTED JUNE 16, 1903.

. C. E. SARGENT. ELECTRICAL IGNITER PO'RAEX-PLOSIVE ENGINES..

APPLICATION FILED Nov. a, 1900. No Holm.. 2 SHEETS-SHEET 1.

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C. E. SARG'ENT. ELECTRICAL IGNITER PDR EXPLOSIVE ENGINES.

APPLICATION FILED NOV. 3, 1900.

N0 MODEL. 2 SHEETS-SHEET 2.

ivo. 731,134.

UNITED STATES :Patented June 1e, 1903.

PA TENT Ormea.

CHARLES E. SARGENT, OF CHICAGO, ILLINOIS, ASSIGNOR OF THREE- FOURTHS TO OLIVER S. LYFORD, OF NEW YORK, N. Y.,`AND CHARLES I-IILLARD, TRUSTEE, OF CHICAGO, ILLINOIS.'

ELECTRICAL IGNITER FOR-EXPLOSlVE-ENGlNES.

SPECIFICATION forming part of Letters Patent No. 731,134, dated J une 16, 1903. Original application tiled April 2'7, 1900, Serial No. 14,553. Divided and this application filed November 3, 1900. Serial To @ZZ whom, it may concern:

Be it known that I, CHARLES E. SARGENT, a citizen of the United States of America, re-

' siding at Chicago, in the countyr of Cook and State of Illinois, have invented certain new and useful Improvements in Electrical Igniters for Internal- Combustion Engines, of which the following is a specification.

My invention relates to certain improvements in electrical igniters for internal-combustion engines'of theclass shown and described in my application for improvements in gas-engines, iiledAprilB?, 1900, Serial No. 14,553, of which this application is a division.

The object of the invention is to produce an igniter or sparking device which shall be more reliable and eective in operation and easier in its manipulation as to necessary repairs and care of the Working parts.

To such end the invention consists in certain characteristics which will fully appear in the following specification and claim.

In the drawings, Figure' 1 is a Vertical transverse section of a cylinder taken through the igniter in the line 1 1 of Fig. 2. Fig. 2 is a side elevation of a portion ot` the cylinder and.

the igniteractuating devices. Fig. 3 is an enlargement of a portion of said elevation, the'y parts in front of the plane 3 3V of Fig. 6 being cut away and the push-bar oG being raised. Fig. 4 is a horizontal section in line 4 4.of Fig. 2. Fig. 5 is a transverse detail section in line 5 5 of Fig. 4. Fig. 6 is a section similar to Fig. 5, with the parts in a dierent position. Fig. 7 isa Vertical detail section in line 7 '7 of Fig. 1; and Fig. 8 is an end elevation of the block which contains the electrodes.

Referring to the drawings,.A represents the cylinder of an internal-combustion Aengine, and B a rotating shaft adapted to carry suitable cams to actuate'the valves and the igniter. YA block N (see Fig. 8) is let into the side of the cylinder, as seen in Figs. 1 and 4, terminating within the latter in the'valvechamber, and said block contains a rockshaft n, terminating at the inner end of the block in a coned enlargement n', seated in the block and bearing a wiping spring-arm n2,

(No model.)

in the block, the electrode being held within the bushing by means of a head 03 at the inside end and a nut o4, bearing7 upon the outside end of the bushing. The electrode is cylindrical in form, so as to be rotatable in the bushing to bring new portions of its surface into contact with the wiping-arm. The elasticity of the springarm causes the latter to bear with a yielding force upon the inner end of the electrode and make a perfect contact therewith. Upon the portion of the rockshaft n without the cylinder is a coiled spring p, having one end p fastened in the blockN and the other end fast at p2 in a collar P, secured by a set-screw p3 to the shaft and adjustable both longitudinally and angnlarly upon. the latter. The spring p is put under 'torsional and longitudinal tension, so as to draw thev coned end n of the rock-shaft to its seat and also to turn the wiping-arm n.2 away from the electrode O. Upon the outer end of thefrock-shaft is securedy a crank-arm 05, (best seen in Fig. 2,) to the outer end of which is secured a push-bar 06,- (see Fig. 5,) resting upon the igniter-operating cam d3. This end of the rock-shaft is pivoted in a bracket q, the lower part of which has a slotted extension q', beveled at Q3, and a plate 07, secured to the side of the push-bar, is bent at an angle at o8 to engage this beveled part of the bracket. The slot in the bracket extends backward from the push-pin sufficiently to allow a limited movement of the latter in the backward direction. TheV push-pin is raised by means of a lug d, inclined upon the for- -ward side With reference to the direction of movement ofthe cam and abrupt upon the rear side. This lug raises the push-pin against the tension of the spring p to bring the wiping-arm into contact with the electrode, and as the push-pin rides off of the top of the lug the contact is abruptly broken, causing the spark. In case of a backward movement of the igniter-cam the push-pin is crowded backward by the lug d and is raised by the bent portion o8 of the plate o7 sutliciently to clear the top of the lug. The wiping-arm n2 is secured to the inner end of the rock-shaft by means of a sereW ns, so as to be removable therefrom for repairs or in case it needs to be replaced by a new one.

Looking at Fig. 3, a shoulder Will be seen on the lower portion of the push-pin o6, which never rises to the position seen in Fig. 3 in the ordinary Working of the engine. When it is desirable to cut the igniter out of operation Without disturbing the electrical connections, the push-bar is raised sufficiently to engage this shoulder with the adjacent edge of the slot g', and while it remains in this positiou it is ont of reach of the actuating-cam d3. In moving the push-bar to this position the spring-arm of the igniter n2 is therefore swung.;` by the electrode o, so that no current may pass While the sparking device is out of operation. This is of great advantage, as it offers an easy means of stopping the waste of the current when it is not needed, and may be particularly available in large engines containing a series of explosion-chambers, in

which it is desirable at times to operate one or more of the explosion-chambers Without using the others.

I claim as new and desire to secure byLetters Patent- In an igniter, a snitably'supported rockshaft, a crank-arm thereon, a push-pin pivoted to the crank-arm, a slotted guide for the push-pin having a beveled surface, a beveled extension upon the push-pin fitted to said surface, au igniter-operating disk having a lug adapted to operate said push-pin, said lug being inclined upon the side corresponding to the beveled surface and abrupt upon the opposite side and normally rotating toward the inclined side of the lug, whereby the slotted guide permits the push-pin to move away from the abrupt side of the lug and the .bev-

-eled surface raises it off of said lug; substantially as described. v

In Witness whereof I have hereunto set my hand, at Chicago, in the county of Cook and State of Illinois, this th day of October, A. I). 1900.

CHARLES E. SARGENT. Witnesses:

CHAs. O. SHERVEY, S. BLISS.

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