US1580371A - Cooling construction for cylinders - Google Patents

Description

April 13 1926.

R; G. DYSON ET AL COOLING CONSTRUCTION FOR CYLINDERS Filed June 8, 1923 J) 4 r 9 12% Z r fiozeri gar/vac)? W :Z/Zez'r a I The cylinder 4 may body portion rib 6 in the Patented Apr. 13, 1926.

UNI'IT-EDIQST'ATES ROBERT PENNSYLVANIA, As

TOWN, PENNSYLVANIA,

* g 1 1,580,371 PATENT". oFFicE.

TROOPER, AND nevus. PLUMMER, or rAI tvI wvILtA oE, sreNoEs T0 ERANKLI IE COMPRESSOR wonxs, 0E Nonme- A CORPORATION OF PENNSYLVANIA.

COOLING CONSTRUCTION FOR CYLINDERS.

Application filed June 8, 1923.-

To all whom it may concern:

Be it known that we, and HARVEY S. PLUMMER, United States, 5 Trooper, in the county State of lage, in the county of State of Pennsylvania, tain new and useful Improvements ing Constructions Pennsylvania,

the following is a specification.

It is well known that the cylinders of air compressors, engines come ho-t during use and similar devices beand that it 1s necessary to cool such cylinders in order to prevent them from becoming overheated.

Various structures have been employed p prior to our mvention.

effecting s entirely s One object of our for the purpose 0 aid cooling, but they havenot been atisfactory.

invention is to provide a simple, durable and inexpensive construction for such cylinders which will effect the proper cooling thereof.

Another object. is to so form our invention that it can be readily manufactured and will be of a practical and strong These objects and formation. other advantageous ends which will be set forth hereinafter, we attain in the following manner, reference'being had to the accompanylng Figure drawing in which- 1 is a fragmentary elevation of an air compressor having a cylinder constructed 'in accordance with our lnvention, and

Figure 2 is a section taken on the line Referring to the drawings, 3 represents the body portion of an air compressor having an'upright cylinder 4. Said cylinder may have the usual bore 5 in which the piston operates for efiecting the compression.

be cast integral with the 3 and includes an exterior form of a helix, the turns or 'convolutions of which start adjacent the lower part of the cylinder and, ascend as clearly shown in Figure 1 of the accompanying drawing. This elicalrib 6 is preferably cast integral with the cylinder and thus forms a helical groove 7 between the convolutions nating wi or turns of the rib 6, said groove lower end at 8 and termith its upper end at 9.

d the fulldepth of the groove.

f" so that the air, when passing Serial No. 644,283. A

It will be noted by reference to the drawing that the extreme ends8 and 9 are flush with the outersurface of the cylinder; and extend gradually inward until they reach On account of this'construction and especially due to such shape of the top end 9 of the groove, any heated air passing upward in the helical channel provided by the groove will be deflected laterally from the cylinder when reaching the top end portion 9 of the groove and therefore the heated air will not pocket in the groove. Thus the heated air quickly passes off and the cylinder is effectively kept cool.

Furthermore, we preferably taper the uper-end of the groove, as shown in Figure 1,

uppermost convolution of the groove, Wlll enter the tapered portionof the groove and here again provision is made to cause the lateral deflection of the heated air away from the cylinder. 7

Having thus described our invention, what we claim as new and desire to secure .by Letters Patent is:

1. A cylinder having in its outer surface a helical cooling groove exposed to the atmosphere, the convolutions of said groove extending in the direction of the height of said cylinder, being flush with the outer surface of the cylinder and extending gradually inward until it reaches the greatest depth of said groove, said groove being so formed as to produce a helically projecting rib whose outer surface is in alignment with the outer surface of the cylinder. 2. A cylinder mosphere, the convolutions of said groove extending in the dlrection of the height or having in its outer surface 7 a helical cooling groove exposed to the atthrough the said groove at its upper end 7 a helical cooling groove exposed to the atmosphere, the convolutions of said groove extending in the direction of the height of said cylinder and having itsupper end terminating Within the height of said cylinder, the intervening rib formed by said groove being flush With and blending into the surface of the top portion of said cylinder, whereby there is no projecting end of the rib toform an obstruction. 10

In testimony whereof We have signed our names to this specification.

ROBERT G. DYSON.

HARVEY S. PLUMMER.

Images