US724945A - Ignition-plug for explosive-engines. - Google Patents

Description

PATENTBD APR. 7, 1903.v

Y W. ROCHE. IGNITION PLUG FR EXPLOSIVE ENGINES.

APPLICATION FILED AUG. 16. 1902.

N0 MODEL.

v7 .lzsla nUNITED ,STATES PATENT OFFICE.

IVILLIAM ROCHE, OF JERSEY CITY, NEW JERSEY.

IGNITlON-PLUG FOR EXPLOSIVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 'l 24,945, dated April 7, 1903.

Application led August 16, 1902. Serial No. 119,843. (No modali;

To a/ZZ whom it' may oon/cern:

Be it known that I, WILLIAM ROCHE, a citizen of the United States, residing at Jersey City, in the county of Hudson and lState of New Jersey, have invented certain new and useful Improvements in Ignition-Plugs forv Explosive-Engines, of which the following is a specification.

This invention relates to ignition-.plugs for explosive-engines; and its primary object is to insure a regularand uniform action of the sparking devices by providing the same with complete and effective insulating means.

A further object of the invention is to insure the direction of the electric current to the sparking-point, thus avoiding premature or ineffective sparking.

A further object of the invention is to provide a chamber adjacent to the sparkingpoint for the reception and compression of spent gases, whereby fresh gas will at all times be presented at the point of ignition.

A further object of the invention is to provide a plug comprising readily adjustable and removable parts.

The construction of the improvement will be fully described hereinafter in connection with the accompanying drawings, which form part of this specification, and its novel and characteristic features will be defined and particularly pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of an ignition-plug embodying theinvention. Fig. 2 is a central Vertical section of the same. Fig. 3 is a bottom plan View of the plug, and Fig. 4 is a perspective View of the sparking clip detached.

Corresponding parts in all the figures are denoted by the same reference characters.

The referencenumeral l designates the body or cylindrical casing ofthe plug, formed with parallel longitudinal circular passages 2 and having a depending externally-threaded annular flange 3, forming a chamber 4 for spent gases. Within each of the circular passages 2 is supported an insulating-tube 5, preferably of porcelain and of sufficient length to extend well above the upper end of the body of the plug and below the lower end of the threaded ange thereof. A cap 6,

' formed with openings for the passage 0f the insulating-tubes, is removably secured to the top of the plug and insulated therefrom by washers 7, preferably of asbestos. The conductor-rods 8 and 9 extend through the porcelain tubes 5, each of said rods havinga head 10 at its lower end and being threaded at its upper end to receive adjusting-nuts 11 and clamping-nuts 12 for securing the wire conductors 13 and 14.

15 designates'a clip, preferably made of steel, bent transversely to form an ear 16, perforated to receive the headed conductorrod 8. The clip 15 is also bent at its upper end to form a lip 17, havingits edge hollowed out to fit against the insulating-tube of the rod 9. A finger 18 is struck up from the body ofthe clip and bent downward so that its point is in proximity to the head 10 of the conductor-rod 9. The clip 15 is applied to one of the conductors, (in the present instance the rod 8,) as best shown in Fig. 2, and when so applied the body portion of the clip extends between the insulating-tubes. The importance of this position of the clip is that in case the current should jump from the end of either of the rods to the body portion of the plug it would pass to that portion of the clip extending between the insulatingtubes, and thus be conducted to the finger 18. The reason of this is that the distance between the body of the plug and the lip 17 of the clip is always less than that from any other two conductive portions-as, say, the head of one of the rods andthe flange 3. Hence the current will follow the shortest road.

Each of the porcelain tubes is preferably formed with a collar 19, tting within the upper portion of the passages 2, and insulatingpackings 20, of asbestos, are interposed between said collars and annular shoulders 21, formed within the passages 2.

It will be seen that by the construction thus described the conductor-rods are each -ment of the parts or for any other cause the current passes into the body of the plug it will be directed to the sparking-point through The parts of the device may be readily assembled and connected to the compressionchamber of an engine.

I Would have it understood that the invention is not restricted to all of the details of construction shown and described, but includes all such variations and modifications as may fall Within the terms and scope of the following claims.

IIaving thus described lmy invention, I claim and desire to secure by Letters Patent l. An ignition-plug for explosive-engines, made up of a body fianged at one end so as to form a chamber for gases, independentlyinsulated conductor-rods extending through said body, and a clip device in contact with one rod and approaching the end of the other to form a sparking-point and having a branch extending between the insulated tubes of such rods Within the chamber, for the purpose set forth.

2. An ignition-plug for explosive-engines, comprising a body portion formed With parallel passages, and a depending iiange forming a chamber for spent gases, insulating- .tubes within said passages, conductor-rods Within said tubes, and a clip in connection with one of said rods, having a finger approaching the other rod, and bent to form a branch to engage one of said insulating-tubes.

8. An ignition-plug for explosive-engines, comprising a body portion formed with parallel passages and having a projecting end iiange forming a gas-chamber, insulatingtubes Within said passages, conductor-rods Within said tubes, and a sparking clip provided With a perforated ear for attachment to one of said rods, a projected finger approaching the end of the other rod, and a lip adapted to bear against one of the insulating-tubes, and partially embrace the same, substantially as and for the purpose set forth.

In testimony whereof I have signed my name in the presence of the subscribing Witnesses.

WILLIAM ROCHE.

Witnesses:

F. O. MGCLEARY, J. CLARK PYBAs.

Images