US1749646A - Cylinder head for gas engines - Google Patents

Description

March 4, 1930. J. s. NEwLoN CYLINDER HEAD FOR GAS ENGINES Filed Aug. 19, 1929 rvPatented Mar. 4, 1930 JAMES S. NEWLON, OF IICHER, OKLAHOMA CYLINDER HEAD FOR GAS ENGINES Application filed August 19,1929. Serial No. 386,938.

This invention relates to improvements in a cylinder head particularly adapted fernse with gas engines and the like.

j An'object of the invention is to provide a u cylinder head which is substantially' stronger, more durable and lighter than cylinder heads now in use. Y y' Another obj ect is to providea cylinder head wherein the available space for the luid cooling system is increased.

A further object is to provide a cylinder head wherein the greater portion thereof may be cast in one piece to render the head stronger, andfwherein the parts which must be se- 15 cured to the casting lare arranged whereby .they Vare Vsubjected only to the pressure of the coolingmedium.

Other objects and advantages lof this invention will becomes apparent during the N course of the following description.

In the drawings I have 'shown one embodiinentof the invention. In this showing Figure 1 is a central vertical sectional view through my cylinder head shown in position.

.25 on a cylinder, l Figure 2 is a sectional view taken substantially on line 2 2 of Figure 1, Y

Figure 3 is a plan view, and

Figure 4 is a perspective view.

Referring to the drawings the numeral 10 indicates the upper portion vof a cylinder provided with acentral opening 11 and a cooling. chamber 12surrounding the opening.

The present invention concerns a cylinder head indicated as a whole by the numeral 13 which is adapted to be secured to the cylinder as will be understood. The numeral 14 indicates acasting formed to provide an inverted y cup-shaped firing chamber l5 therein and having a spark plug receiving. opening 16 leading into the firing chamber and an intake opening 17 also leading into the firing chamber.4 The castingy 14 includes a lower annu-lar tlange-like`portion 18 provided with fluid receiving openings 19 and an upper annular portion 20 connected to the lower annular portion by a plurality of bolt receiving tubes 21.v The tubes 21, annular portions 18 and 2() and the iiring chamber are all cast in one piece, preferably of steel, and the bolt openings in the tubes extend through the upper and lower annular portions whereby bolts or the like 22 may be used to secure the head tothe cylinder.

Referring to Figures 1 and 4 it will be noted that the tubes 21 are slightly spaced from the outer periphery of the annular portions whereby a relatively thin substantially annular steel band 23 may be welded between the upper and lower annular portions. The x upper and lower edges of the .band 23 are welded to the upper and lower annular portioiisrespectively and the ends of the band are welded to thecasting adjacent the valve receiving openingy 17, substantially as shown at 24 (see Fig. 2).

A cover plate indicated as a whole by the numeral 25 is adapted to be secured on the outer face of the upper annular portion 2O and is formed with a relatively thick outer annular portion 26 in which bolt receiving openings 27 are provided whereby the bolts 22 may extend therethrough when the head is secured to the cylinder. The cover plate is further formed with a relatively thin flexible inner portion or disk 28` preferably formed of cast steel, which is welded to the outer portion 26 substantially asl shown in Figure 1. The disk portion is provided with a central opening 29 adapted to register with the spark plug receiving opening in the casting and a spaniel nut 30 is threaded through the opening 29 into the casting. As shown in Figure 1 the tubes 21 extend upwardly beyond the wall of the firing chamber and the portion of the casting adjacent the spark plug receiving opening extends upwardly beyond the upper extremity of the tubes whereby the cover plate will evenly contact with the casting. The space 33 between the cover plate and the ring chamber formsa portion of the cooling chamber in the head.

The operation of thedevice is as follows:

The bolts 22 are adapted to extend through the outer portion of the' cover plate and throughthe casting into the cylinder in order to properly secure the head in position. lhen thus secured, the openings 19 in the lower annular portion of the casting will register with the vcooling chamber 12 of the cylinder to permit the cooling medium to circulate around the firing chamber. If desired a gasket 31 may be interposed between the cylinder and the head and a similar gashet 32 may be interposed between the cover plate and the outer face of the upper annular portion of the casting.y

It will be noted that substantially all of the head with the exception of the band 23 and cover plate is cast iny one piece thus obviating the disadvantages of prior constructions wherein the tubes are threaded into the portion of the casting surrounding the tiring chamber, and also obviating the disadvantages of prior constructions wherein portions of the head subjected toypressure from within the cylinder were formed in more than one piece, The metal band 23 and the disk Q8 Varethe only welded portions in my construction and it will be apparent that these portions are subjected only to the pressure of the cooling medium 'circulating throughout, the head. Obviously these welded joints will not be subjected to a great amount of pressure and the device'will be materially strongand durable,

i The provision of a relatively thin band 23 i .and arelatively thin disk 28serves to increase the lightness of the head and yet does not sacrifice strength. vAlso, it will be apparent that the spacefthroughout which the cooling Vrmedium circulates is increased in a head con structed in accordance with my invention and that greater eiiiciencyot the engine will result from better cooling. v

My cylinder head provides a construction which iseasily formed, which is economical and which is capable of long life. VIt itis desired to remove the cover plate to gain access to the cooling chamberit is only neces-.

sary to remove the bolts 22 and the Spaniel nut 30. Neither the bolts nor the nut are f affected inv any way by the circulation of the cooling mediumV and the danger of rust or lcorrosion to these elements is slight.

While I have described in detail the preferred embodiment of my invention it is to Vbe understood that various mechanical 'changes may be made therein without depart- `tubes registering with said openings, the outerperipheries of said tubes being slightly spaced yfrom the oiitery peripheries of said annular portions, said casting-including a firing chamber adapted to communicate with ft'lievopening in av cylinder, a spark plug receiving yopening communicating with said Vchamber and a Vvalve receiving opening com- Y municatingvwith said4 chamber, an annular vvband secured between said upper and lower annular portions, and a cover plate arranged on the upper face of said upper annular por tionl and lbeing provided with openings registering with said bolt receiving openings and said spark plug receiving opening respectively, said lower annular portion being provided I with iuid receiving openings adapted to communicate with theV cooling chamber of the'cylinder when the head is secured thereto. 2. A cylinder head comprising a casting formed with upper and lower annularpor-l tions having bolt receiving openings therein and being further formed with bolt receiving tubes registering with said openings whereby said head may be secured to a cylinder, said tubes being slightly spaced from the outer peripheries of said annular portions, said to communicate with the opening in a cylinder, a spark plug receiving .opening communieating with said chamber and a valvevreceiv- 1 lcasting including a liringv chamber adapted ing opening communicating with said chamlower annular portions for vsealing the side vwall of said head, and a relatively thin cover plate arranged on the outer face of said upper annular portion and being spaced from the outer wall of said firing chamber to form a cooling chamber, said platebeing provided with an opening registering with said spark,

plug receiving opening, said lower annular portion being provided with liliiid receiving ber, means arranged between said uppery andV e openings adapted to communicate with the cooling chamber of the cylinder'when the head is secured thereto;

3. A cylinder head .comprising acasting formed with upper and lower annular portions having bolt receiving openings therein and being further ormedfwith bolt receiving tubes registering with said openings whereby vsaid headmay be secured to a cylinder, said tubes being slightly spacedrom the'outer peripheries of saidf annular portions, said casting including a firing chamber adapted to communicate with the opening in a cylinder,

a spark plug receiving opening conimunicat l ing with said chamber, a relatively thinv annular band welded between said annular portions to Jforni a side wall for said head, a cover plate havinga relatively thin portion arranged on the outer face of said upper lannular portion spaced yfrom the wall of said tiring chamber and having openings lregister'- ing withY said bolt receiving openings, yand a Vspaniel nut securing the central portion of said plateto said casting adjacent said VVspark plug receiving opening.y said lower annular portion being provided Vwith fluid; re-

oei-ving` openings Vadapted to communicate when the head secured thereto. n

r`In testimony whereof I aiiiX my signature.

' JAMES NEWLON;

with the coolingy chamber of the-cylinder i, iso

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