US1579739A - Valve-reseating device - Google Patents

Description

April 6 1926. 1,579,739

J. E. ISWISHER VALVE RESEATING DEVICE F iled May 25, 1925 IN VEN T 0R.

BY ,l V M I TORNEY Patented Apr. 6, 1926.

JonN n. SWISHER, or HUNrrNoroN, wnsr vinernra.

VALVE-RESEATING DEVICE."

Application filed May 25, 1925. SerialNo. 32,726.

To all whom it may concern:

Be it known that JOHN E. SWISHER, c1t1 zen or the United States, residing at Huntington, in the county. ofCabell and State of West Virginia, has invented certain new and useful Improvements in Valve-Reseating Devices, of which the following is a specification.

of this character peculiarly adapted for finishing the washer, seat in boller gauge cocks such as are used for locomotives and thef 5 hot steam or scalding water issue around the stem and are apt to burn the hand of the engineer or fireman operating such gaugecocks. As a result it is common, from time to time to replace these valves and the stems.

on which they are formed but this is not only expensive on account of the cost or new valves and stems, but also requires that the boiler be blown off (meaning thereby that the fire be drawn and the water level lowered below the gauge-cock to be repaired). Setting aside the expense of drawing the fire and rebuilding the same, each new valve and stem costs approximately onedollar and, as these renewals take place about once in ten days on each gage-cock and there are three gage-cocks to a boiler, the yearly expense for this one item of upkeep amounts to well over one hundred hollars. It can now be readily appreciated that a railroad of ordinary size having several hundred engines in service finds this a very important item of expense. Moreover, it is impracticable to remove thesevalves and stems and true up the washer seat in a lathe or other machine tool as such removal and truing up costs considerably more than the cost of a new stem and valve, these commonly being made on automatic lathes.

Various mechanisms have been devised for refinishing valve seats in steam or water valves but such devices have been commonly his invention relates to valve seating devices and has special reference to adevice restricted tosuch arrangements as require removal of the valve stem and consecpientv absence or pressure on the contents of the boiler or pipe. Consequently, such devices are inapplicable for the present purpose whic i is to refinish the wa; her seat without removal of the valve and, not only that but to so operate the mechanism as to accomplish the refinishing operation without the working of the device tending in any way to unseat the valve but, on the contrary,,to ensure it being firmly seated.

Thus the principal object of the invention is to provide an improved device whereby the washer seat oi a boiler gauge-cock valve may be refinished without removing the gauge-cock body or its valve from the boiler, the refinishingoperation being ac complished while the boiler is fired up and under pressure if desired, it being noted, however, that it is not essential that the boiler be under pressure as the same operation can be performed on a cold engine.

With the above and other objects in view as will be hereinafter apparent, the invention consists in general of certain novel details of construction and combinations oi parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed. a I

In the accompanyin actors of reference indicate like parts in the several views, and:

Figure 1 is a sideelevation of a standard gage-cock broken away to show the location of the washer and its seat.

Figure 2 is a longitudinal section through such gage-cock with certainparts removed and the refinishing device applied.

' Figure 3 is a side elevation of the refinishing device removed from the gage-cock.

- Figure 4 is an end view thereof. In order to understand the operation attention is first invited to the construction of a boiler gage-cock and it will be seen that there is provided a body 10 having a pas-- drawings like char- 14 extend the parts 19 affording communication with this passage. On the body is inouted a union nut 20 which engages a bonnet 21 through which the stem passes, the latter being provided with grooves which afford communication with the escape nozzle 23. The bonnet is provided with a stulling box or gland 24 and the stem is revolved by the usual handle 25, Between the flange 17 and the bonnet 21 is a loose washer 26.

In operation the valve 16 normally is off of the seat 12, the flange 17 engaging the washer 26 when the cock is closed. To open the cock the handle 25 is given a turn which moves the flange 17 away from the washer 26 thus permitting flow of steam or water through the cook, it being noted that the handle is not turned ufficiently to seatthe valve 16. Now, the washer 26 is ordinarily made of some suitable material such as hard fiber and can be renewed from time to time by screwing up the valve until it seats on the seat 12, whereupon the handle may be removed and the bonnet disconnected whereby a new washer can be substituted. Not only the washer is subject to wear but the flange 17 becomes worn so that it does not seat properly on the washer 26 and there is a constant lea *age. As before noted prac tice shows that about once in ten days a new stem is required, because of this wear.

lVe will now consider the invention itself. This consists of a tubular body 27 of tool steel having on its front end a left hand face mill 28 and just behind this face mill is a collar 29. The body has a knurled head and between the head and the collar slides a sleeve 31 having on the end adjacent the collar 29 a screw thread of proper size to fit the union nut 20. The other end of this sleeve is provided with a knurled head 33. As can be seen from Figure 2, all that is necessary to refinish the flange 17 is to screw up the valve till it seats on the seat 12, remove the handle and bonnet and slide the finishing tool on the stem. The stem itself forms a guide for the finishing tool and ensures the cutting of the outer face of the flange 17 truly at right angles to the stem. It will be noted that the cutter under these conditions, extends into the outer end of the body 10 and thus is doubly guided. The thread 3:2 is now engaged by the nut 20 and the sleeve thus acts as a feed sleeve to force the mill 28 against the flange 17, the mill being rotated by the knurled head 30. This knurled head is then given one or two turns and the device removed, whereupon it will be found that the stem is properly refinished.

There has thus been provided a simple and ei'iicient device of the kind described and for the purpose specified.

It is obvious that minor changes may be made in the form and construction of the invention without departing from the material spirit thereof, It is not, therefore, desired to confine the invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

Having thus described the invention, what is claimed as new, is:

A tool for the purpose described including a tubular body portion adapted to fit closely on the stem of a valve to be refinished, a. face mill formed on one end of the bot y, an operating handle formed on the other end thereof, a collar formed on said body adjacent said face mill, a sleeve slidably and rotatably mounted on said body between the handle and collar and adapted to bear against said collar, a feed screw on one end of said sleeve adapted for engagement by the union nut of a gage-cock, and a hand grip on the other end of said sleeve.

In testimony whereof I aflix my signature.

JOHN E. SWISHER.

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