US703963A - Valve. - Google Patents

Description

No. 703,963. Patented July |902` c. P. LYNCH.

VALVE.

-(Appication filed Dec. 6, 1901,)

(No Model.)

UNiTnD STATES CHARLES I. LYNCH, OF ST. LOUIS, MISSOURI, ASSIGNOR' TO ST. LOUIS UNIVERSITY, SOURI.

OF ST. LOUIS, MISSOURI, A CORPORATION OF MIS- VALVE.

SPECIFICATION fol-ming part of Letters raten@ No. 703,963, dated July 1, ieoa.

Application filed December 6, 1.901. Serial No. 84,935. (No model.)

To @Utah/0771, t Amag/rconccrn:

Be it known that-1, CHARLES P. LYNCH, aV citizen of theUnited States,resjidingin the city of St. Louis, State of'Missouri, have invented a certain new and useful VImprovement inV Valves, of which the following is a full, clear, and exact description, such-as will enable others skilled in the art to which it appertainsto make and use the same, reference being had to the accompanying drawings, forming part of this specification, inwhich- Y Figure 1 is a central vertical sectional elevation, certain of the parts being shown in side elevation. Fig. 2 is a view generally similar to Fig. 1, the vparts being shown in a dierent positionyand Fig. 3 isa top plan view, partlyin section, o n the line 3 3 of Fig. 1.

My invention relates to improvements in valves, and more particularly to valves in which packing is unnecessary, my object being to provide an efiicientand convenient structure in which leaking is Wellguarded against.

To this end and also to improve generally upon devices of thecharacter indicated my invention consists in the various matters hereinafter described and claimed.

Referring now more particularly to the drawings, 1 indicates the globe or main portion of the valve-casing, having the usual seat 2.

3 indicates the extended sleeve portion of the casing, and 4 is the cap for closing the upper end of the same.

5 refers to the valve-stem, provided with the usual hand-wheel 6, and 7 indicates the valve, which is suitably supported upon the lower end of a sleeve 8f Said sleeve is interiorly threadedand is engaged by the lower threaded end 9 ofthe valve-stem, suitable vertical slots 10 in the periphery of the sleeve receiving guide-wings 11 upon the casing, whereby rotation of the valve-stem serves'to raise or lower the `valve without rotating the same,

and thus grinding it upon its seat.

Near its upper end the valve-stem is provided with'an enlargement 12, whose Yupper surface is rounded and turned to closely iit a seat 13 in the under surface of the cap 4, the

Aby said enlargementfis held to its seat. about the point offthe valve-stem which lies lower portion of said enlargement extending into the bore `of the casing portion 3. Immediately below the said enlargement the casing-wall extends inwardly a short distance to produce a shoulder,which lies runder the edge of the said projection, and at asuitable point below said shoulderli the casing-wall again extends inwardlyyto produce a shoulder 15,

a spring 16 being coiled about the stem and bearing 'between said'f shoulder 15 and the under surface of the enlargement l2, whereinV line with the shoulder .151:When the parts are assembled said'stem is provided with a collar 17, which is of slightly less diameter than the diameter of the coiled spring, Wherebysaid collar.` does not interfere with the proper seating ofthe spring upon the shoulder 15, but prevents accidental separation of the spring from ,the stem when the stem is withdrawn from the casing. For the sake of illustration the space between the shoulder 14 and the under surface of the enlargement 12 is exaggerated. In practice, however, this space is somewhat less thanone thirty-second of an inch inafull-sized valve, whereby anyconsiderable depression of the valve-stem by the operator when turning the same is prevented.

As is shown in Fig. 2, the proportions and arrangement of the parts are such that the end of the stem is seated against the end of the sleeve 8 before the said sleeve or the valve engages any portion of the casing. Thus when the valve is fully raised further rotation of the stem in the direction for raising said valve and sleeve is impossible. This is important, for were the upward movement of the sleeve to be arrested before-the stem has reached the limit of its movement further rotation of said stem would cause the same to further enter the sleeve, andlin so doing the enlargement 12 would be drawn away'from its seat 13 against the action of the spring 16, thus permitting leakage through the cap about the stem.

The present construction of valve is simple in its construction and efficient in operation,

the parts being readily made and assembled, excessive depression of the valve-stem being avoided, withdrawal of the enlargement from its seat by the rotary movement of the stem being prevented, and the accidental separation of the spring from the stem when the parts are withdrawn from the casing being guarded against.

I am aware that many minor changes in the construction, arrangement, and combination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-fl. In a valve, a valve-casing, a valve-stem, a cap having a seat in its lower face, an enlargement upon said stem fitting said seat, and a fixed casing portion extending under sembled, said collar engaging said spring but` being of less diameter than the same; substantially as described.

In testimony whereof I hereunto affix my signature, in the presence of two witnesses, this 3d day of December, 1901.

CHARLES I). LYNCH.

Witnesses:

GEORGE BAKEWELL, GALEs P. MooRE.

Images