US477607A

US477607A - pbatt

Info

Publication number: US477607A
Authority: US
Publication date: 1892-06-21
Anticipated expiration: 1909-06-21

Description

(No Model.)

R. N. PRATT.

- No. 477,607. Patented June, 21, 1892;.

I UNITED STATES PATENT OFFICE.

RUFUS N. PRATT, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE PRATT & CADY COMPANY, OF SAME PLACE.

COCK.

SPECIFICATION forming part of Letters Patent No. 477,607, dated June 21, 1892. Application filed July 23, 1891. Serial No. 400,488. (No model.)

To (1. whom it may concern:

Be it known that I, RUFUS N. PRATT, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connccticut, have invented certain new and useful Improvements in Cocks, of which the following is a full, clear, and exact specification.

This invention relates to the class of cocks forstopping or regulating the flow of hot or IO cold liquids or vapors so constructed that they may be renewed, repaired, or cleaned without disturbing the cock from its connections.

The object of the inventionis to provide a I5 cock of this class which is durable and cheap in construction with interchangeable faces around the ports held in position by simple means which can be readily removed to free the faces for renewing when they become so worn that the cock leaks.

Referring to the accompanying drawings, Figure 1 is a longitudinal vertical section of the cock. Fig. 2 is a horizontal section. Fig. 3 is a transverse vertical section, and Fig. 4

2 5 is a plan of the cock.

In the views the letter a indicates the body of a closed-bottom fluid-cock cast to shape of any suitable metal, with a central barrel or plug-chamber b, from which open ports 0 to the ends that are provided with screws or flanges for attachment to the pipes or mains of the system in which the cock is to be located.

In the plug-chainber adjacent to and hav- 5 ing an opening that coincides with the ports and resting on the bottom or a part of the bottom are loosely placed interchangeable faces d, that are shaped to fit the interior of the chamber. These faces are preferably formed of asbestus fiber and rubber gum vulcanized and solidified under suitable heat and pressure, so that they become very hard and will retain their shape under all the degrees of heat to which the ordinary cock is subjected. Of course these faces can be made of other material than the composition named. If desired, they may be made of soft metal. The tapering rotary plug e, having the usual fluid-way, is made considerably smaller than the interiordiameter of the plugchamber and fits the removable faces quite closely when held in place by any common form of gland. Between the removable faces cl, which are held from rising upward by the tapering plug, are placed holders f, so shaped as to wedge or hold apart the removable faces d. These holders are preferably made of metal thinner than the thickness of the faces, curved to fit the interior of the chamber between the faces, which they rest against and hold in such manner as to prevent any sidewise movement toward or from each other past the ports when the plug is rotated. A lug or rib f is preferably formed in the back of these holders f to fit into a groove or between two lugs b on the interior wall of the barrel, so that when dropped into position between the faces the holders cannot themselves move sidewise. This condition maybe reversed and the lugs or ribs may be formed on either the holders or on the body and project into a complementary groove or recess on the other part. These holders are inthe construction shown formed in two separate pieces but of course, if desired, they may be united'over the top of the faces, so as to form a single piece in order that both may be re moved together as a single holder, without doparting from the construction set forth, except as to joining them at the top.

The interchangeable pieces are dropped into the barrel of the cock, the holders are placed between the faces, and the plug inserted and secured in place by any common means. 8 To renew, repair, or clean the cock without disturbingits connections, the holders may be lifted from the barrel, and this so frees the faces that they maybe removed and new ones substituted if they are so worn that the cook 0 leaks. The holders firmly seclire in place in a simple manner the faces, which are of such shape that they exert but little friction upon the plug and are cheap and occupy but little space, so that a number may be kept on hand 5 to be used when required.

The construction of the cock is cheap and tises in the walls of the chamber, inserted be- 10 there are no parts-which require special .grindtween the faces to prevent them from rotating and fitting to make-a tight cock. ing, and a rotary plug in contact with the I claim as my inventionfaces and holding them to the wall, substan- 5 A rotary-plug cock having a body with a tially as specified.

frusto-conical plug-chamber, faces curved t0 RUFUS N. PRATT. conform to the interior, loosely resting on the E Witnesses: bottom of the chamberadjaccnt to the ports; JUsTUsP. LEWIS, curved wedges with ribs projecting into mor- HARRY R. WILLIAMS.