US896543A - Cylinder for gas-engines and the like. - Google Patents

Description

No. 896,543. I 4 PATENTED AUG. 18, 1908. G. HOUBEN.

" CYLINDER FOR GAS ENGINES AND THE LIKE.

APPLICATION IIILED FEB. 2, 1905.

CARL HOUBEN, or SAARBRUCKEN,

GERMANY, ASSIGNOR TO- EHRHARDT & SEHMER,

GESELLSOHAFT MIT BESOHRANKTER HAFTPFLIGHT, OF SGHLEIFMUHLE, NEAR SAARBRUUKEN, GERMANY.

CYLINDER FOB GAS-ENGINES AND THE LIKE.

Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed February 2, 1905. Serial No. 243,873.

To all whom it may concern:

Be it known that I, CARL HoUBnN, engineer, a subject of the Emperor of Germany, and residing at 10 Schloss ilatz, Saar-- briicken, Germany, have inventor a new and useful Improved Cylinder for Gas-Engines and the Like, of which the following is a specification.

The present invention relates to an improvement in the cylinders of gas-engines and the like.

The raising of the pressure which has recently takenplace in the case of gas-engines and the like, demands more and more strength on the part of the working cylinders of these machines, and itis difficult to manufacture cylinders of somewhat large diameter for large gas-engines, which, in the presence of explosion pressures of 2025 atmospheres, possess sufficient strength and durability.

It is necessary to give to the working cylinders walls of unusually great thickness to withstand the maximum pressure of the gases, whereas the cooling jacket cast in one piece wth the working cylinder, requires a wall of only slight thickness. On account of this unequal distribution of the iron in the double cylinder, internal stresses arise in the same which, on the cooling of the casting, or during the use of the finished cylinder, not infrequently cause the formation of cracks.

The object of the present invention is to manufacture the cylinder with cooling jacket free from internal stresses by giving to the inner working cylinder and to the outer cooling jacket, walls of equal or approximately equal thickness.

A cylinder with cooling jacket, according to the present invention is illustratedin the accompanying drawing, in which Figure 1 is a longitudinal section of the same, and Fig. 2 a cross-section.

As shown in the drawing, the inner cylinder a has a wall, the thickness of which is less than that corresponding to or less than under ordinary circumstances would. be

' necessary to withstand the highest working ressure, whereas the cooling jacket b is ormed with a wall having a thickness greater than that corresponding to or necessar to withstand the ordinary pressure to w ich a coolin jacket is subjected, so that it 0011- possesses asurplus of strength.

sequent y thls surplus of strength In order to render useful for the strengthening of the working cylinder, the space between the working cylinder and the cooling jacket is traversed by water under pressure, which water both cools the cylinder walls and also, in consequence of its small amount of compressibility, transmits as a rigid body so to speak, all excess strain upon or yielding of the inner cylinder to the strong cooling jacket, and consequently the excess material and consequent reserve strength of the outer cylinder is rendered useful for the reinforcement of the inner cylinder. Inorder to effect this transmission of pressure in the highest degree, it is of course important that neither airnor any other elastic gas be present in the cooling chamber. This is provided for by su plying the cooling water to the cooling cliamber from below at the place 0, and by leading it off from the highest laces d d in order that a collection of air and gas bubbles in the cooling chamber may be avoided.

What I claim as my invention, and desire to secure by Letters Patent, is:

1. A cast cylinder for gas engines and the like comprising an internal working cylinder having walls of a strength less than the de signed maximum stress, an outer jacket with walls of substantially the same thickness as the working cylinder, and an intermediate space for a practically incompressible liquid.

A cast cylinder for gas engines and the like comprising an internal working cylinder signed maximum working ressure of the gas,

an outer jacket'witlnwal s of substantially the same thickness as the working cylinder, and means for supplying a practically incompressible cooling medium at the lower portion of the space between the said walls and for withdrawing the same at the upper portion of said space.

3. A cast cylinder for gas engines and the like comprising an internal working cylinder having walls of a strength less than the (leslgned maximum worklng pressure of the gas,

an outer cooling jacket having walls of a reserve strength at least equal to the deficit in the working cylinder walls, and means for supplying. to the space between said wallsapractically incompressible cooling medium.

4. A cast cylinder like comprising an internal working cylinder having walls of a strength less thanthe. de-

for gas engines and the signed maximum working pressure of the gas,

an outer cooling jacket with walls of substantially the same thickness as the working cylinder, the reserve strength of the jacket walls being at least e ual to the deficit in the working cylinder wa s, and means for supplying under pressible cooling medium at the lower portion 'ofthe space between said walls and for withpressure a practically inconidrawing the same at the upper portion of said 1 0 two subscribing witnesses.

CARL HOUBEN. Witnesses:

WALTER HAUSING, WALTER SoHUMANN.

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