US965585A - Sparking plug for explosive-engines. - Google Patents

Description

JONES. SPARKINGl PLUG FOR EXPLOSIVE ENGINES.

v APPLIQATIU rmm `nrovfi, 190s.

' Patented .my 26.

Inl/enfer.'

To all whom it may concern:

UNTTED STATES PATENT OFFICE.

,cYRUs F. Jones, or OREGON, 'ILLINoIs SPARKING PLUG FQR EXPLOSVE-ENGINES.

-lmprovements in Sparking Plugs for EX- plosive-Engines, ofv which the following is a specification.

My invention relates to sparking devices for explosive engines, and more specifically y to that'class'i` fof the saine commonly known as sparking plugs.

The objectofmy invention yis to provide a plug ofthe character. mentioned, which will be especially applicable to vgasolene engines,

and one which will-.beef such improved construction as 'to bei-adapted topbe readily and easily attached thereto or detached there- A. further objectof'fmy. invention is to -p rovide a deviceofsthe character mentioned,

' consists in a plug characterized as above mentioned, and 1n certain details of construction and arrangement of parts allas will be hereinafter more fully described and 'particularly pointed o'ut'in the claim.

My invention will be more readily understood by reference ytothe accompanying drawings forming apart `of this specifica-K` tion, and in which,

Figure 1 isa side elevation of my device in its preferred form, Fi' L, 2 is a central longitudinal section the'reo Fig 3 is a side lelevation of the` sparking,` plug proper re-A moved from the plug sleeve, Fig, l1f 1s a top plan view thereof, Fig'.4 y5- is' aI perspective view of the plugr sleeve', the plug proper be- 'ing removed, andFig. 61s a top plan view thereof. p Referring now to the drawings, my device -I comprises a plug properjl, and a sleeve 2 therefor, thelatter beingI preferably formed of steel, although it may be formed'of any other suitable metal. Inthe plug proper 1, 3 indicates a metal conducting rod and 4 an insulating coating therefor, the latter be-l ing formed ofany' suitable material, but

, preferably ofk porcelain', glass, orl wood.

5 indicates a metal disk, preferably of steel, the same being' of a diameter slightly less than that of the `insulating coating 4;.

Specification of Letters Patent.

Application filed November 4, 1998. Serial No. 461,064.

Patented July 26, 1910.

'Said disk is fixed in any suitable manner, but preferably threaded upon the lower extremity of therod 3. Threaded upon the upper extremity of said rod 3, is a lock-nut 6 serving an obvious purpose, and a binding-nut 7 for a purpose hereinafter described. Fixed, preferably by being pressed thereon, upon the outer surface of said insulating coating 4, and preferably positionedthereon at substantially the central portion thereof, is a metal coatingor sleeve 8. Said coating 8 is provided upon its outer surface, at points diametrically opposite each other, with radially extending projecting pins 9. The lower edge 10 of said. coating 8, is preferably beveled, as clearly shown in'Figl 2 of the accompanying drawings.

The lower portion 11 of the'sleeve 2, is provided with a male thread, and the outer surfaceof said sleeve is formed hexagonal as4 at 12 ada ting said member to be screwed into, hence Xed-in an engine casing. The inside diameter of the upper portion of said' sleeve 2, is substantially the same as, or slightly greater than, as the outside'diamcter of the coating 8 of the plug proper, that is, said coating 8 is adapted to fit snugly within the upper portion of the sleeve .'mernber 2. The inside diameter of the lower end ortion 10 of said sleeve 2, is slightly less than that ofthe upper portion thereof, the annular shoulder 13 thereby formed being preferably obliquelydisposed at the same angle as the lower edge 10 of the coating 8 of the plug member 1, hence, makin 1t possible when the'latter is inserted in' t e Sleeve' member 2 to form an airtight connection between saidshoulder 13 with said lower edge lO'of the.

member 1. Arranged diametrically op os'ite each other in the walls of said vmem er 2, close to the upper edge thereof, are obliq'uelyr .disposed slots 14.4 Longitudinally disposed passages 15, provided in the inside surface of said'sleeve, and'extending from the upper extremities of said slots 14, establish. com-l munication with the up er. edge of the sleeve 2, as clearly shown in gig. 5.

In attaching the plug proper to an engine provided with a sleeve member 2,hence' attaching the same in said sleeve 2, lsaid plug proper is inserted in said/sleeve so that the pins 9 thereof shall engage, that is, pass through the passages 15, whence'tliey enter the slots,14. Said pins 9 are sopositioncd on the member 1 and the slots vlil in the parts, by,l lcontact of the.

member 2 that a partial rotation of the vmember 1, causes the beveled lower ed e of the coating 8 thereof to be forced own or other electrical energizing means, byl

means of the binding-nut 7. An *automat-v ically operated make and break mechanism beinginte'rposed between the plug and the energizing means, it is obvious that as connections are made, sparks will jump from the periphery of the metal disk meinber',

which forms the anode to the adjacent walls ofthe plug sleeve 2,which forms the cathode, hence, causing explosion of the explosive mixture in the engine.

By the provision in -an engine of a spark- I'ing plug as described, it is obvious that the plug proper may be readily and easily re- 30 moved from the plug sleeve, that is, from the engine, and may -justas easily andv quickly be replaced therein, resulting in numerous advantages known to any one with the slightest knowledge ot explosive engines.

While I haveshown what I deem to be` Ithe preferable form of my device, I do not wish to be limited thereto as there might be many changes made in the details lof construction andarrangements of parts without departing `crom the spirit of my invention.

Having described my invention. what I claim as new and desire to secure by Letters Iatent, is

In a tw'o-partsparking plug, a cathodeforming sleeve comprising a cylindrical member having its central portion squared to form a Wrench-hold, the lowerr end of said member being externally threaded, the i l bore of said member being reduced in diameter toward the' lower end forming a conical shoulder, an anode-forming lug roper def tachably secured in said p u s eeve, said plug proper comprising a cy lndrical elon-l j.

ated member formed of insulating material avin a uniform cross section of ss diam eter t an the smallest' diameter of said sleeve, said insulating; member extending4 considerably above said cathode-forming' sleeve and terminating wit-hin .and at av distance from the inner end thereof, a central rod extending entirely through said cylindrical member, a metal disk threaded i upon the lower end of said rod and bearing against the lower end of saidv member, a

lock nut threaded upon the upper. end

vthereof and a binding screw also upon said upper end, a metal jacket secured about the -Y central portion vof Said member and adaptedto lit loosely within the upper end of said4 )lug sleeve, the lower end of said jacket eilig formed lto fit upon -said conical shoulder, oppositely disposed rods extending radially from said jacket, the inner surface' of said sleeve heilig provided Vwith obliquely disposed slots in its up er portion to receive said rods, whereby said 7 5 ,v plug and its jacket may4 be readily i'emoveclwitlioiit loosening j or removing any .other part or parts of the device and whereby when iii position a tight 8O i .d

fit is maintained between'the parts at.sa1 conical shoulder, substantially as described.

In testimony whereof I have signed'my name' to this'specitic'ation in the presence` of two subscribing witnesses.

crans F. Joules4 `v Witnesses: j

. H. H. Toon, v

GLENN EDELMAN.

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