US1766740A

US1766740A - Spark-plug mounting

Info

Publication number: US1766740A
Application number: US398215A
Authority: US
Inventors: Bitchman Oscar
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-10-08
Filing date: 1929-10-08
Publication date: 1930-06-24
Anticipated expiration: 1947-06-24

Description

June 24, 1930. o, BITCHMAN SPARK PLUG MOUNTING Filed 001.. 8, 1929 Patented June 24, 1930 Y.

' UNITEDSTATES osoAR BITCHMAN, or HABANA, CUBA fsrARx-rriue MOUNTING Applicaten mea gember s, 1929. semaine. 358,215.

TheV present invention is directed to improvements in spark plug mountings.

The primary object of the invention is to provide a device of this character so con- V structed that when the plug is removed the plug opening of the cylinder will be closed to prevent the escape of explosive gases from the cylinder, thereby preventing any possibility of an explosion. Y

19 Another object of the invention is to provide a device of this character constructed in such manner that when oney plug of the series or set is removed for replacement or repair it will not be necessary to 35 stop the engine. f

Another object of the invention is to provide a mounting of this character so constructed that the plug will be housed and protected against collection of oil and car- 2@ bon thereon, therebvv maintaining the engine at a high point of efficiency.

Another object-of the invention is to provide a device of this character so constructed that it can be operated or manipulated to permit removal and replacement of a plug in a comparatively short time.

Another object of the invention is to provide a device of `this character so constructed and arranged in such manner that .30 the spark plug opening of the cylinder will 1 be effectively closed so as Vto eliminate noise while the spark plug is being changed, it being obvious that should the gas under pressure in the cylinder be ,discharged therefrom, considerable noise will result. l

Another object of the invention. is to provide a device of this kind which is eX- ceedingly simple in construction, efficient in operation, durable, and one which can be 4d manufactured at a minimum cost.

i With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more ,45; fully described, claimed and Villustrated in the accompanying drawings, in which:

Figure 1 is a vertical central sectional view through the device, showing it nposition upon a portion of a cylinder.

Figure 2 is a similar view showing the mounting in position "to close` the /plug Opening@ Y 1v Figure 3 is a sectionall vie-W Aon the line of Figure l Figure 4e is a perspective viewof the plug `55 and ring in non-assembled relationship. f 'Figure' 5 is a verticalv sectional view through the plug, showing the same mountedin a bushing.

Referring to the drawings,y 1 designates 60 Y' a portion of an internal lcombustion en ine cylinder, in this instancethe head, an vin which `is formed, asfis 'customarl the threaded opening 2; "'Theinner'sur acerof the "head is provided with a conical seat'B, 05 the purpose ofV which will be laterV eX- 'plained,

"The mounting 'includes an eXterio-rly threaded hollow plug 4 having a square tool engaging head 5 upon its upper end, 'w whereby a suitable tool may be employed for applying the plug tothe cylinder or removing the same therefrom;v f

The plug is closed `at itslower endand has its Wall formed with a plurality of ra- 75' dially disposed ports 6, preferably seven in' number.-""

The plug' is exteriorly threaded upon its lower end, as at 7 ,and threadedithereon isI the ring whichconstitutes a valve 8 adapted .90 toengag'e the seat 31Whenfthe spark plug 9; is removed.l .'lhe spark plug 9 is of Vconventionaleform andis threaded inthe plug' 4,. the velectrodes thereof vbeingv located slightly labovethe plane of the ports"`6. Whenthe spark plug'9 is engaged in the plugi, archamb'er A isl provided between the spark plug and the closed end of the plug 4, so that when the compressed charge lof fuel enters this chamber'it will be highly compressed.` Obviously, whendgnition of the gas .takes placeiny the chamber A, the flame Willppass through the ports 6 4and ignite the compressed vcharge Within the cylk inder, and owingl to the restricted nature Y of the'port 6,4the flame ejected therefrom, will be in blast-like form, thus insuring proper ignitiongof the gases Within the cylinitier. In .this manner, the explosion .will ,"f i

be very effective in operating the piston within the cylinder.

The combined cross sectional area of the lower end of the plug 4 and the ring 8 will provide a elicient deflector to prevent oil from entering the chamber A through the ports 6, and should any carboncollect within the ports 6, the blast of the flame will dise charge the same, thus maintaining the chamber A and the spark plug in a thoroughly clean condition.

When it is desired to remove the spark plug 9 it is only necessary to place the proper tool upon the head 5 and rotate the plug to thread the same upwardly'in the opening 2, whereupon the ports 6 will be coniined in the opening 2, and the ring 8 will engage the seat 3, thus ellectively sealing ,the cylinder and preventing gases therein escaping to the atmosphere While the plugis being removed or replaced. After the spark plug has been replaced, .the rotationof the plug 4 is reversedso that the ring 8 will disengage the seat 3 and the ports 6 will open freely into the cylinder.

4'Ihering 8 is threaded upon the plug 4 in a left hand direction sot-hat when the ring engages the seat, the tendency will be to more Y:firmly secure the -ring upon the plug. The ring .8 has a beveledupper face l() in order to assume a leaf-proof joint when the ring is engaged in the seat 3.

. The ring 8 is of greater diameter than. the opening 2 and is obviously applied tothe plug aftersaid plug has been threaded in said opening. v

Owing vto the multiplicity of ports 6, a number of jets of flame will be emitted from the chamber A to more effectively ignite the compressedcharge of gas in the combustion chamber of the cylinder.

In Figure 5, the plug A is shown engaged in a bushing l1 so that the` plug can be applied to a marine engine.

l From theA foregoing, it is thought that the operation and many advantages of the here-V in described invention will be apparentto those .skilled in the art without further descriptionand it will be understood that various changes in size, shape, proportion, and minor details of .construction may Ibe resorted to without departing from the spirit or sacricing any of the advantages of the invention.

AIVhatiis claimed is:

An internal combustion engine having a threaded opening in its wall communicating with a coinbustionchamber, a hollow plug open at its upper end and closed at its inner end, the plug being externally threaded for engagement with the threads of the opening and having its inner end portion projecting into the combustion chamber when the plug isy screwed tightly into the opening, side ports being formed through the walls of the plug adjacent its closed inner end, the wall of the engine being formed with an annular seat about the inner end of its Opening, a collar about said plug between the ports and the inner end of the plug, the ports being adapted to be closed by the walls of the plug receiving opening when the plug is screwed outwardly and the collar constituting a valve head engageable with the seat when the plug is screwed outwardly to tightly seal the inner end of the plug receiving opening about the plug, and a spark plug removably mounted in said plug above theV ports and removable through the open upperend thereof.

. In testimony whereof I aiiX my signature.

OSCAR BITCHMAN. [L s]