US967009A - Packless valve. - Google Patents

Description

G. S. FRISHMUTH. PAGKLESS VALVE. APPLICATION I'ILEQ-APB. 19,1903.

Patented Aug. 9, 1910.

NrrED strntrns PATENT orrion.

PACKLESS VALVE.

ee'aooa.

Specification of Letters Patent. P te t d Aug. 9, 1910.

Application filed April 19, 1909. Serial No, $90,841.

To all whom it may concern: Be'it known that I, CI-IARLEs S. FRISHJ MUTI-I, a citlzen of the United States, re-

siding at Philadelphia, in" the-county of.

Philadelphia and State of Pennsylvania, have invented a certain new and-useful Improvernent in Packless Valves, of which the followlng 1s ,a full, clear, .and exact description. v y r The object of this invention is to provide a so-called packless valve, that is to say, a valve requiring no stufling boX or gland or packing otherwise placed, to render it fluld tight, and which, while of general utility is specially applicable to steam-heatingsystems.

lit is desirable toregulztte with considerable nicety the admission of steam to the radiators in steam heating systems.- One system uses only one valve on each radiator, with a drain pipe at the opposite end of the radiator'from that at which the valve is located. When this valve is fully" opened sufiicient steam is admitted to fill the entire radiator before condensation begins, and

then by turning the valve to more or less It 1S S0 ugl1t by this invent-lon to provide a valve that will adequately meet these con' ditions. n I The 1nv'ent1on consists of a paekl'ess valve I having a conical valve seat, a plugfitted to said seat, a stem on said valve which does not come into contact with its seat, said.

valve preferably held to itsseat by a spring internally applied, and an indicator show-Y ing the position ofthe ports, or, in other.

words, the extent to which the valve is,open and admitting steam, all as I will proceed now particularly to describe and claim.

In the accompanying drawings, illustrat-'- ing the invention, 1n the several figures of which like parts are similarly deslgnated,. Figure 1 is a longitudinal section of one em bodiment of the invention. Fi 2 is atop plan view of the casing or she Fig. 31sa top plan view of the plug detached. Fig. 4 is a longitudinal section of a valve showing the spring mounted upon a spider pivoted in a crossbar in the tail-pieceor connection. Fig; 5 is a top plan view of the connection. Fig. 6 is a top plan view ,of the spider.

The valve casing or shell in the construction shown, has a cylindrical body 1, with a screwthread 2 in one end to receive the screwthreaded tail-piece or connection 3, one of the functions of which is to connect the valve .with a steam supplying medium. This connection has a lateral flange 4 to limit the extent of insertion of the connection into the shell and to make a 'sightly external finish. The upper end of the shell is made frusto-conical at 5 with a substantial hori zontal shelf or offset 6; merging into the lateral connection T,v and bearingihe'indi- .cator marks or scale 8. The connection 7 is designed to permit connection with the radifa'tor or coil, in any usual Way. The conical portion 5 has a cylindrical hub 9. The in teriorof thefrusto conical,part of the shell is ground to afford a'valve seat for thecor-- respondingly-shaped plug 10/ This plug is made hollow, and has afcylindrical stem 11 rising from its conical apex and'fitted in the bore of thehub' 9, so as to have free play therein, and thus forestall all expansion diliiculties. Outside of the shell the stem is provided with a handle or other form of turning device 12, and the hub 13 of this turning device and the adjacent end of the hub!) are machined or otherwise accurately fitted, .so that by properly adjusting the turning device on the stem and fixing it thus by the set screw indicated by dotted lines curate fitting of these two parts insures against the Weight of the turning device tilting the plug on itsseat and still further, by reason of the fact that the stem is no part of the seatingor a ctive face of the plug, but

terior-of the-shell by a wall 15 having a the conical valve seat. The plug 10 likewise hasia complemental segmental port 17 Figs. 1 and 4, the plug may be drawn up to its seat and held there; and, further, this ac-.

The connection 7 is separated from the insegmental port 16. This wall is a part of rises as a cylinder fron'rthe conical valve registering with the port 16 in "the shell.

By turning the plug, any desired port openmay know at a glance the relative quantity seat to take the pressure 0 of steam entering the Valve.

The plug is held to its seat a coiled or other spring 18, resting on the upper edge of the connect-ion 3 and bearing against the lower edge of the plug, preferably thfliugh an interposed angle Wear-plate or ring-shield 19. The tension of the spring may be regulated by the extent to which the connection 3 is screwed into the shell, under limitation of the flange 1-, or by the thickness, or pres once 'or absence of the wear-plate or ringshield 19.

As shown in Figs. 1, 5 and 6, the spring may be supportedupon a rotary'spider 20 having a central pivot-lug 21 seated in a hole 22,111 the cross-bar 23 of the tail-piece or connection 3; and this spider also'has a rim-flange 24: to confine the spring, and like the part 19 to serve as a shield for it. The mounting of the spring in this spider obviously admits of the adjustment of parts without liability of twisting the spring, since there is no strain on the spring. In these constructions, the truly cylindrical stennrising from the frusto-conical lug comfils the of the stem and thus, as stated, forestalls the sticking of the valve under expansion. The plug has a considerable spread .or wide angle, and a corresponding seat, and the plug is kept in contact with its extended seat by'the spring.

In case of expansion or contraction, the

spring operates automatically directly upon the plug and maintains it seated and tight at all times, and so insures additionally against leakage aroundthe stem.

so far I am aware, Valves of this general character now in common use have ground seats, and have to be so perfectly machined and delicately adjusted that if the service is continuous or for long periods, their easy and effective operation is but short-lived. In all ground plug cocks, the seat part is almost cylindrical. In use these valves readily oxidize or corrode in contact with the fluid, and when there is a variation in temperature, changes result which.

interfere with the easy operation of the valve or cook In my construction, the plug is held uously in one plane, no difiiculties will occur by reason of any inequality of surface; in fact, the continued movement of the plug on its seat keeps the plane of contact smooth and regular.

Other forms of indicators may be used.

The invention is not limited tothe precise construction and arrangement of springs, but the constructions shown are preferred, because of the compensation for the effects of variations in temperature.

It is important, also, that the handle be secured to the stem of the plug in a fixed manner, so that the plug may not be drawn too tightly to its seat. It has been found that the use of a nut on a screwthreaded end of the valve-stem, arranged above the handle, is likely to result in such excessive tightness, because most workmen are disposed to turn down a nut hard.- On the other hand, if the nut be loosely applied, it is apt to be run off in operating the valve. I have shown the handle fixed to the stem by a set-screw laterally applied, and this insures against the objections named to the use of a nut, and not only so, but fixes the handle securely to the stem and to its rest upon the hub. As distinguishing from a nut, which is unstable and movable in the use of the valve, and a set-screw or other fixed fastening,

kwhich is stable and immovable, I herein refer in the claims to the latter as a stable and immovable fastening A By means of the constructions described, the purpose and object of the invention are accomplished in a simple and efficient manner, and by a durable device. There is no need for acking of any sort to render the valve fluid-tight, and the valve may be operated easily.

Although the invention is shown as em bodied in a shell having a cylindrical body, it is obviously within my invention to use a body of any desired or appropriate contour.

What I claim is 1. A valve, having a shell provided with a body containing a frusto-conical valve seat having a segmental port, a lateral discharge connection opposite said port, a cylindrical hub rising from said seat, and a supply connection, combined with a frusto-conical hollowplug of wide spread fitted to said seat and ported complementally and provided with an integral stem arranged in said hub, said seat and plug accurately fitted, and the plug having a handle secured 'in place in a stable and immovable manner, a spring interposed between the base of the plug and the supply connection and maintaining said plug on its seat, and an angle wear plate interposed between the spring and base of the plug, whereby the valve is rendered and maintained leak-tight without requiring packing.

'2. A valve, having a shell provided with a body containing a frusto-conical valve seat having a segmental port, a lateral discharge connection opposite said port, a cylindrical hub rising from said seat, and a supply connection, combined with a frus to-conical hollow plug of wide spread fitted to said seat and port-ed complementally and provided with an integral stein arranged in said hub,

" said seat and plug accurately fitted, and the plug having a handle secured inplace in a stable and immovable manner, a spring interposed between the base of-the plug and thesupply connection and maintaining said plug on its seat, an angle wear plate inter posed between the sprlng and base of the plug, whereby the valve is rendered and maintained leak-tight without requiring packing, and whereby -the supply of fluid passing through-the valveis nicely regulated,

and means to indicate the quantity of such fluid so passing.

8. A packless valve, havinga shell provided with a body terminating in a frustoconical and portedvalve seat, a cylindrical hub for the stem, a frusto-conical ported plug fitted to said seat and having a cylindrical stem loosely fitted in said hub, and a handle on said stem, combined with 'a spring arranged to press the plug to its seat, a wear-plate interposed between the spring and p u an ad ustable connection fitted to the b0 y of the shell beneath the spring, and a rotatable spider interposed between the spring and said connection.

In testimony lwhereof I'have hereunto setss my hand this seventeenth day of April A. D.

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