US464727A - Island - Google Patents

Description

(No Model.)

M. DART. LUBRIGATING STOP GOGK.

No. 464,727. Patented Dec. 8, 1891.

Ill/II I UNITED STATES PATENT OFFICE.-

EDIVARD M. DART, OF PROVIDENCE, RIIODE ISLAND.

LUBRICATING STOP-COCK.-

SPECIFICATION forming partof Letters Patent No. 464,727, dated December 8, 1891.

Application filed August 10, 1891. Serial No. 402,213- (No model.)

To all whom it may concern.-

Be it known that I, EDWARDYIVI. DART, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Self-Lubricating Stop-Cocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it'appertains to make and use the same.

This invention relates to an improvement in self-lubricating stop-cocks, the object of the invention being to provide a simple, cheap, efficient, and durable stop-cock adapted for successful and lasting use in all the various situations where stop-cocks are needed; and a more particular object of the present invention is to improve upon or supplement in certain respects the stop-cock described and claimed in my other pending application for patent on a self -lubricating stop-cock filed March 17, 1890, Serial No. 344,189 and it therefore consists in the construction, arrangement, and combination of the several parts, substantially as will be hereinafter described and claimed.

In the annexed drawings, illustrating my invention,Figure 1 is a side elevation of myimproved stop-cock. Fig. 2 is avertical section of the same on the line a: as of Fig. 1. Fig. 3 is ahorizontal section on the line y y of Fig. 1.

Similar letters of reference designate corresponding parts throughout all the difierent figures of the drawings.

A designates the shell of myimproved selflubricating stop-cock, and B the rotative plug fitting closely and neatly therein within the seat which the shell provides for it. The plug B is provided with the usual transverse passage b. The plug is also provided with a hori: zontal or transversely-situated lubricant-containing chamber 0, formed in the upper portion of the plug, the ends of the said chamber being on the sides of the plug, so that the outer shell A may form the end walls for the chamber 0. Furthermore, the plug is provided with a vertical passage D, extending from the upper end of the plug and communicating with the lubricant-containing chamber C, said passage D being thus adapted to serve as an inlet-opening through which lu bricating material may be placed within the chamber 0. The upper or outer end of the passage D is adapted to be closed by means of a screw cap or plug a. The lubricant, be-

ing within the chamber 0, spreads itself more clearly define the improvement which constitutes the present invention.

I will now proceed to describe the features of my present improvement. E E denote vertical grooves of suitable size, which are cut on the inner face of the shell A alongside of the plug B, said grooves being located diametrically opposite each other, as shown in Figs-2 and 3, and extending from points adjacent to the opposite ends ofthe lubricant-containing chamber 0, when the plug is in the position shown in Fig. 2, to points a short distance from the base of the shell A-say three-eighths of an inch or so from said base. Considering the fact that the plug B is rotated to throw the passage 19 into line to register with the pipe portions-of the shell or tothrow it out of such line, it will be readily perceived that the lubricant-containing chamber 0 will at certain times be in communication with the upper ends of the two vertical grooves or channels E E, and also will at certain times be out of connection with said grooves. In other words,

it may be said that the grooves E E connect with chambers C only at those intervals or times when the cock is open, it being observed by reference to Fig. 2 that the transverse passage b is located in a direction at right angles to the situation of the chamber 0.

The particular advantage and benefit of the grooves E E consists in the fact that by opening the cock for a short interval the oil or lubricant may be allowed to distribute itself very quickly into the grooves and around through the seat of the plug. After the plug has been closed the operation of difiusion by capillary attraction will take place exactly as it does in the plug, which is unprovided with the said grooves. The grooves, therefore, are

cock properly lubricated through a long pe riod of years.

Having thus described myinvention, whatI claim as new, and desire to secure by Letters Patent, is-

1. The herein-described stopcock, consisting of a shellproviding a seat-for the plug, a:

plug fitting closely therein and having the usual transverse passage, said plug-beingfurther provided with a lubricant-containing chamber formed in the upper portion'thereof,

the ends of which chamber are on the sides of the plug and are closed by the wall of the shell, and said plug having'also an inlet-open through which lubricating material may be placed within the chamben-andthe vertical grooves formed in the interior face of the wall of the shell and arranged to be in communiing communicating with the saidchamber' cation attheir upper ends with the lubricantcontaining chamber whenever the plug is open, but not in communication therewith when the plug is closed, all substantially as described.

2. The herein-described stop-cock, consisting of ashell providing a seat for the plug and having on its inner face adjoining the plugseat suitable vertical grooves running from near the top to near the bottom of the shell, a rotative tapering plug fitting closely within the seat provided therefor by the shell, said plug having its upper end suitably squared for t-heapplication thereto of a wrench, and having also the usual transverse passage, and said plug having also a lubricant-chamber formed in the upperportion thereof,the ends of which chamber are on the sides of the plug and are closed by the wall of the shell, an inlet-openin g in the upper end of the plug C0lllmunioa-ting with the aforesaid chamber and adapted to permit the introduction of lubrieating materialinto the'chamber, and a screwiplug for closing said inletropening, the whole arranged so thatthe lubricating material within the chamber may spread itself bycapillary attraction through the joints between the plug and the seat, substantially as described.

In testimony whereof I affi-x my signature in presence of two witnesses.

EDXVARD M. DART. Witnesses:

JOHN T. IIENTHORN, GEO. H. REMINGTON.

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