US1573545A - Inner ring for pistons - Google Patents

Description

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UNITED STA i Annan L. HAMIL'roN;

, sizes.

' INNER RING FOR PISTONS. i

Application led March 9, 1925. Serial No. 13,953.

To all wronaz't mayl concern:

lle it known that I,

a citizen of the Unit Brooklyn, county of ARDEN L. HAMILTON, ed States, residing at Kings, and State of.

New York, have invented a certain new. and

useful Inner Ring for Pistons, followingis a specification.

This invention relates of which the to inner ring adapted to beused in conjunction with the piston rings of' internal combustion engines tobe positioned between the inner circumference of the rings and the bases ofthe associated piston grooves. The purposepf an inner ring is to centralize thefpiston with respect to the cylinder wall to prevent lateral play of the piston commonly known as piston slap;

When a piston has lateral play. or slap, it will tilt and the piston rings will fail to present al proper wiping e to the cylinder wall.

able in worn pistons, is of loil and carbon troubles.

-a loose piston greatly when associated with This defect, inevitfrequently the cause Inner rings bviate these disadvantages.v

' Inner rings are, in

their most convenient form, manufactured in long strips of spring steel` of a width slightly less than the width of the piston groove and, such strip material is crimped or bent at spaced distances longitudinally so that its length is made up of a succession of substantially straight' portions united by relatively shortJ bends.

The mechanic, when usinor the stri cuts n a therefrom the lengths of material desired from time to time as Inasmuch as occasion may require.

it is difficult to accurately measure the circumference of the baseof the piston' groove and accurately apply it the strip material, the mechanic roughly estimates the length required and then cuts off a piece of the strip somewhat longer than necessary, thereafter proceeding to fit the strip tothe piston groove by successive l ly cutting off short lengths until the proper length is obtained.

It isthe object of this come this tiresome and slow method of fitting..v

Speaking generally, bodies'a strip of springA the invention emsteel bent to form a succession of relatively straight portions an at least one end of which strip is graduated and marked according togdiferent piston That is tosay the strip and mark 0 I start at one end of if on the 'strip certain invention to over-A lengths appropriate to pistons'of different or BROOKLYN, NEW Yoax.

sizes and each graduation is marked with-a l designation showing the size of. piston to which that partcular so that a mechanic may readily see where to cut the strip 1n order to obtain vthe p roper length for any particular piston. This ar'- rangement eliminates wastev inherent in prior practice and enables a quick fitting through obviating loss of time.

Features of the invention, those specified, will hereinafter detailed panying drawings.

The v accompanying drawings illustrate one practical embodiment of the invention,

but the construction therein shown is to be understood as illustrative, only, and not as the limits of the invention.

defining 1 is a perspective'view showing a Figure length is appropriate,

v Y .05 other than be apparent. lfrom the p description and claims, when read in conjunction'with the accomportion. of the length of strip material enit bcdying the present .invention and.

Figure 2 shows such material laid out iat and graduated in accordance with this invention.

In Figure 1 o f the drawings, I have illus-A trated alength of strip material made in accordance with vthis invention andi from this showing it will appear that thestrip is bent tol Aform a succession of -straight por- 'each of the commonly used sizes I next cal- -culate the circumference of the base ofeachof said grooves and after having obtained these circumferential dimensions I equal' distances from at least one end of the strip and as shown in Figure 2 form on the strip graduations 2, 3, 4, 5, etc. by stamping,

marking, printing or otherwise delineating line or mark that can be on the strip a next mark the strip adjacent readily seen'. I

lay olf each of these graduations with the diameter 'of the piston to -which the appropriate. For example, 2 is marked whichl I. have designated strip, will properly {it the groovepieten.4 Similarly length mark is the graduation if cut from the of the 2H the graduation is 110 2H;- showing that the distance i 4 rrooves which that marked 3% showing that a. piece equal in` length to the distance g Will properly fit a piston 31/8 in diameter.4 I mark upon one end of the strip sufii'cient graduations to enable a mechanicto fit the pistons of any of the well known makes of car having piston particular strip will properly tit. l

In practice, both ends of the strip or only one end of the strip may be marked and it is frequently found'convenient 'to mark but one end of the strip and then use this end as a scale by which the other or unmarked end of the strip, may be measured. In other words, the parts to be used are cut from the unmarked end 'of the strip, the marked end thereof serving as a scale to show a 'mechanic the 'lengths which he needs for successive jobs. It both ends of the strip are marked the firstl cut may be made from the marking of one end and proceeding cuts made from the same end, While employing the .scale at the other endas a gauge.

The drawings show the invention in'its preferred practical form but the invention is to be understood as fullycommensurate with the appended claims.

f Having thus fully described the inven- Lav/agees tion, what I claim as new and desire to secure by Letters Patent is 1. Inner ring stock 'comprising a thin\ strip'of resilient sheet metal, at least one end portion of ywhich strip is provided With graduations'spaced from said end of the strip distances corresponding to the circumference of the base of the piston ring grooves `otfpistons vof different sizes, eachof said graduations-bearing a. designation in termsl ing designated in accordance with the piston diameter and spaced -from the end Vof the strip a distance substantially equal to the circuniference'of the base of the ring groove of such piston.v

2l. Inner ring stock coml'nismg a strip of spring steel longitudinally crimped and graduated longitudinally to show the length of material which must be cut from a strip to properly cooperate With a particular piston size.

In testimony lwhereof I have signed the foregoing specification.

ARDEN L. HAMILTON.

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