US1471743A - Internal-combustion engine - Google Patents

Description

Oct. 23 1923. 1,471,743

W. H. LEGATE INTERNAL CMBUSTION ENGINE Filed aan. 24, 1920 v Parenteel @ce 23, i923.

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WILLIAM HENRY LEGATE, 0F HARTFORD, CONNECTICUT.

INTERNAL-COMBUSTION ENGINE.

Application led January 24, 1920, Serial No. 353,669.

To all whom t may concern.:

Be it known that-I, WILLIAM H. LEGATE, a citizen of the United States, residing' in Hartford, in the count-y of Hartford and State of Connecticut, have invented a new and Improved Internal-Combustion Engine, of which the following is a specification.

My invention relates to the type of engines above named, and an object of my invention, among others, is to provide an engine of -this type that shall have means for reducing or practically eliminating the collection of carbon and other impurities on.

the valves and on the walls ofthe combus# tion chamber.

One form of device embodying my invention and in the construction and use of which the objects herein set out, as well as others, maybe attained,fis illustrated in the accompanying drawings, in whichy Figure 1 is a perspective view of a piston commonly used in internal combustion engines and embodying my invention.

Figure 2 is a view in section through a portion of .the cylinderand piston of an internal combustion engine, said piston embodying my invention.

It is a well known fact that carbon and other impurities collect to an objectionable exten-t in most of the internal combustion engines in use at the present time, thereby preventing the most eiiicient results from being obtained in their operation, this deposit of carbon and other impurities creating a medium within the combustion chamber for taking and retaining heat suliicient to cause premature explosions in a manner and at such times as'to greatly. reduce the efciency of the engine under these condid0' tions. My invention provides a structure wherein this deposit of carbon and other impurities is greatly lessened, and in fact,

practically eliminated.

The piston of an internal combustion en-4 gine is very susceptible to the deposit of carbon hereinbefore referred to, and I have, therefore, shown in the drawings herein my, invention as especially applied to such piston, in such drawings the numeral 5 indicating a fragment of a cylinder within which a piston 6 is mounted to reciprocate in the ordinary manner, said cylinder comprising a combustion chamber 7.

y In carrying my invention into effect I form an openin 8 through the piston head 9, thls opening eing of a size closely ap'- piston, and within this opening 8 I place a dome or lining preferably constructed of a metal to -which carbon deposits are little likely to adhere. This opening 8 is formed with ay recessed mouth 10 into which .the dome, hereinabove referred to, is forced under great pressure, lthe parts being so formed that after such pressure has been applied the dome will be retained securely in place. In the preferred form of the structure the recessed mouth is undercut to receive the edge of the dome which is forced tightly into place therein. This provides a structure that is very simple in its construction and that completely forms the end or bottom wall of the opening within the piston. The temperature within the chamber in the piston being much less than that in the combustion chamber 7 and the dome being exposed to the fullv eifects of the fluid contents within the chamber in the piston, said contents are made use of to reduce the temperature of the dome and thereby maintain that wall of the combustion chamber formed by the piston head at a much lower vtemperature lthan would otherwise be obtained.

A ver eiective structure with the use of which t e results contemplated may be obtained comprises a dome or lining 11 containing a chamber 12, in the preferred form of construction, this dome being composed the recess 10 in the manner hereinabove described, the oute'r plate being shaped in the general form of the outer end ofthe piston to rovide a smooth surface thereon.

`ill/bile myk invention is not confined to any specific metal' having the properties for resisting the 4deposit of carbon herein d escribed, yet I have found that fGerman s11- ver will produce extremely satisfactory results.

I have illustrated and described my invention as applied to .that wall of the combustion chamber formed by the end of the piston but my invention contemplates a structure in which other parts of the wall of the combustion chamber may receive my 1mproved lining.

In accordance with the provisions of the `patent statutes, l have described the principles of operation of my invention, together `vith the device which I now consider to represent the best embodiment/thereof; but ll desire to have it understood that the device shown is only illustrative, and that the invention I claim- 1. The combination in an internal combustion engine having a Ipiston\l chamber therein with a recessed Wall, of a liningY orlglnally larger in areathan said recess but forced thereinto to secure it therein.

2. rlihe combination in an internal combnstion enginehaving a combustion chamber therein with a recessed Wall, of a lining comprising two pieces ohmaterial formed with a space between them and originally larger than said recess, but forced thereinto to secure said lining in place.

3. fll.`he combination in an internal combustion engine having a combustion chamber therein with a recessed Wall, of a lining secored insaid recess and comprising tvvo may be carried out by other means.'

Lemme pieces of material formed to provide a cham ber between them.

4f. In combination in an internal combustion engine having a combustion chamber therein, a member reciprocatingly mounted in said chamber and forming a movable Wall thereof, which Wall has an opening formed' therethrough with a recessed mouth, and a.

lining secured in said recess.

5. 'llhe combination in an internal combastion engine having' a combustion chamber therein, of a piston mounted to reciprocate in said chamber, said piston having a recessed openingv through its end, and a lining comprising two pieces of material curved to form a chamber between them, said lining being secured in said recess.`

f5. rlhe process of forming a piston for an engine that consists in providing a recess in the end of the piston, ormin a piece of material having an area slightgly larger than said recess, and then forcing said material into said recess to form a lining.

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