US66857A

US66857A - Daniel lee

Info

Publication number: US66857A
Authority: US
Publication date: 1867-07-16
Anticipated expiration: 1884-07-16

Description

@einen gisten @aient @ffice IMPROVEMENT IN GLOBE-VALVES.

lLitige rlgchnle ntmh tr in that rttcrs n'trnt mit uniting pitt nt 'tigt anni.

'IO ALL IVI-IOM I'I MAY CONCERN:

Be it known that I, DANIEL LEE, of Boston,ln the county of Suti'olk, and Stateof Massachusetts, have' invented an Improved Construction or Arrangement of the parts ot" Glohe-Valves; andI do hereby declare that the following, tnkeuin connection with the drawings which accompa-nyland form part of this specification, is a description of my invention sufficient to enable those skilled in the artto practise it. i

In the ordinary construction of globe-valves it is well known that the screw by which the valve is moved toward and from its seat is formed on the valve-spindle, between the hand-wheel and the valve, so that the threads' oi' the screw in the movements of the valve-spindle are apt to disarrange the packing in the stuiiing-box, which clogs the screwlthreads. In this common construction, if the steam isadrnitted so as to enter under the valve in passing through it is obvious that the tendency is to press the valve oil` from its seat, so that it is difficult to keep a valve so used tight, and if the valve leaks, it is troublesome under pressure to rearrange the packing in the stuffing-box, or to supplynew packing. If vin the old construction steam is admitted over the valve, then of course the packing cannot be rearranged or newly supplied while steam pressure is present. The old construction is such that it is diicult to grind'the valve inits seat, and it' properly made so that the stuiing-box can be packed when the valve is shut, it takes more' room in the direction of the length of the valve-spindle than does my improved construction.

This construction, which is the subject of my invention, consists in the location of the screw by which the valve is moved toward and from it's seat, and thevalve itself on that side ofA the diaphragm of the globe which is most remote from the stuing-box or the protruding end of the valve-spindle, this arrangement obviating, in the construction of globe-valves, the' defects which I have named as incident to thcold construction.

The drawing represents the case of a globe-valve in section, showing'the valve and its spindle and handwheel, the valve being seen as closed upon its seat.

a is the'inlet end of the case casting, which is markedd; e, the outlet end; d, the diaphragm which :separates the inlet and out-let, and in which'tlie Valv-seat is formed; e is the hand wl1eel on the valve-spindlef; g, the valve thereon, and k the'screw by which thevalve is worked. The packing is contained between thetend o t` the neck z', through which spindle f passes, and screw-cap ,7' thereon. Into the neck la, opposite the neck 2', a plug, Z, is screwed, in which is formed a nut to fit the screw L, the threads of both screw and nut being preferably lefthanded, so as to have the direction of rotation of the hand-wheel the same to open and close the -valve as in the old construction of globe-valves. The size of the opening in the neck k is` such as freely to admit the valve, and the hand-wheel is fixed to the spindlef after it is inserted in its place. v y

In my construction, when the valve-spindle is to be packed, the valve being closed upon its seat, it will be observed that the hand-wheel is in its ,position most remote from the valve-case, affording room for withdrawal of the cap j. But in the old construction, when the valve is upon the seat, the hand-wheel isin its nearest position to the valve-case, and the spindle of the valve has to be made long enough to allow the withdrawal upon it while in that position of the packing-cap, so that it will be seen that in the old Aconstruction the projecting part of the valve-spindle has to be as much longer than in mine as is equal to the amount which it is desired to have the valve traverse. l

In grinding my valve itis only necessary to remove the plug Z, and then the valve can be freely moved longitudinally, and can be rotated on its seat, making the application ot the grinding powder, the grinding operv ation and cleaning, of the part-s from the grinding powder extremely easy.

I claim the arrangement of the valve and the screw which moves it with relation to the diaphragm, stuHngbox, and plug l, substantially as and forthe purpose described.

` DANIEL LEE.

Witnesses:

J. B. Caesar, F. GOULD.