US169817A

US169817A - Improvement in globe-valves

Info

Publication number: US169817A
Authority: US
Publication date: 1875-11-09
Anticipated expiration: 1892-11-09

Description

N.c.LocKE.

GLOBE-VALVE. No. 169,817, Patented Nov. 9,1875.-

Fla 2 WITNESSES /mvbmroe NFEI'ERS, PHOTO-LITH'OGRAPHER, WASHINGTON. D. C.

UNITED STATES PATENT @Frroa.

AND ALPHEUS G. LOOKE,

OF SAME PL AGE.

IMPROVEMENT IN GLOBE-VALVES.

Specification forming part of Letters Patent No. 369,817, dated November 9, 1875; application filed I April 5, 1875.

To all whom .it may concern:

Be it known that I, NATHANIEL G. LooKE, of Salem, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Globe-Valves, of which the following is a specification:

The main object of this invention is to prevent cutting of the valve and of its seat by the steam, 850., passing through the valve when opened; and for this object the invention, among other features in detail, consists, principally, of a prolongation or extension of the valve-stembeyond its seat portion, which prolongation is of suitable form and size to closelyfit within, and to continuously surround and close, the opening through the valve-seat, and is of such a length that, when it is drawn entirely out of the valveopening to open said opening to the passage of steam, 850., its seat portion will be then situated without and beyond the direct course or flow of the steam, 860., through the valve-opening, thereby securing such seat against injury by the flow of steam, 8tc., through the valve; and, again, in the combination, with the above, of a seat for the seat portion of the valve-stem, which seat is located back and away from the valve-opening, so as to be outside of and beyond the direct course or flow of the steam through the vah'e-opening, thereby securing it against injury by the flowof steam, 850., through the valve.

In the accompanying plate of drawings, Figure 1 is a central section with the valve closed;

. and Fig. 2, a similar view to Fig. 1, but of only apart of the valve, which is shown as open.

In the drawings, A represents the globular chamber of aglobe-valve; B, the inlet, and G the outlet, passages for the steam, 850., intercepted by a partition, D. The partition D has an opening, E, through it, for the passage of steam, 850., from the inlet to the outlet openings of chamber A. At the opening E the valve-stem seats, and this stem works, by its screw G, through the shell of the chamber A, all as ordinarily. The seat a for the valvestem F is around, and outside of, and back away from, the valve-opening E, as shown in the drawings; and on this seat a the valvestem F seats by its disk b, of truncated form, as shown. H, an extension or prolongation of the valve-stem F. This extension H is from the disk b of valve-stem, and it is made of a form and of a shape to nicely and closely fit 7 within and to continuously surround and close the periphery of the valve-opening, so that before steam, 8tc., can pass through the valveopening the full length of the prolongation must be drawn out of, and its end f made to clear, the valveopening E; and, obviously, it this extension or prolongation H be either long or short, the seat portion b of the valvestem F will be carried correspondingly a greater or lesser distance away from the valveopening before steam, 8tc., can pass through the valve-opening, thereby proportionately removingit from the direct line of flow or course of the steam, 850., through the valve-opening, and securing protection to it against being injured and cut by the steam, 850., which passes through the valve-opening.

The location above described of the seat a about valve opening E for the valve-stem seat b also secures its protection against being injured and cut by the steam, 8m, flowing through the valve-opening.

The end fof valve-projection H is beveled, as shown, and this bevelingserves to direct the How of steam through the valve-opening when the valve is opened, as described, and thus to increase the protection of the valve stem seat 1) against being injured and cut by steam, as described.

g, a groove or recess between valve-seat c and valve-opening E. This recess 9 catches the sediment in the steam, 8m, and retains and holds it from contact with the two seat portions a and b of the valve.

What I claim as my invention is- 1. The prolongation or extension H to valvestem seat I), constructed and formed to closely fit within and to continuously surround the valve-opening E, substantially as described,

for the purpose specified.

2. The combination, with the prolongation or extension H of valve-stem seat 1), constructed to closely fit within and to continuously surround the valve-opening E. of the to the valve-opening seat a, located relatively recess g open and clear when the seat I) of the valve-stem is closed against the seat a, substantially as described, for the purpose speci- E, all substantially as and for the purpose described.

3. The end f of the prolongation H to valvestem seat I), beveled as and for thepurpose fied. specified. NATHANIEL O. LOCKE.

4. The combination of the seat a of the valve- Witnesses: I case, constructed with a recess, g, Withthe EBEN N. WALTON, seat I) of the valve-stem, all so as to leave the ALPHEUS O. LOOKE.