US283774A - Cut-off for service-pipes - Google Patents

Description

(No Model.)

J. GRAHAM.

l GUTOFP FOR SERVICE PI'PBS- No. 283,774. Patented Aug. 2 8, 1883.l

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NrTnn STATES PATENT Orrrcn.

JOHN GRAHAM, OF CHICAGO, ILLINOIS.

Vcur-OFF FOR SERVICE-Pipes.

SPECIFICATION forming part of Letters Patent No. 283,774, dated August 28, 1883.

VApplication'filed February $10, 1883. (No model.)

.7.10 all whom it may concern:

Be it known that I, lJOHN GRAHAM, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented new and useful Improvements in Cut-Offs for Service-Pipes, of which the following is a full description, reference `being had to thc accompanying drawings, in

which- Figure l is a side view, Fig. 2, a longitudinal section online x,- Fig. 3, a detail showing the inner end of the weighted shaft.

The objectV of this invention is to improve the construction and operation of a cut-off for a water service-pipe having a single shaft by so arranging the valves with the shaft that the waste-valve will not be opened until the water-valve is closed, and so that .the waste-valve shall be closed before the water-valve is opened when the movement is reversed; 'and it consists in providing the inner end of a shaft with one or more shoulders and a crank or wrist pin, and combining1 the same with two valves, and in the several combinations of parts hereinafter more fully described and claimed as new.

In the drawings, A indicates the body or central part of the cut-off, B, the coupling` for the service-pipe; C, stand-pipe; D, wastepipe; E, couplings; F, weighted lever or crank; G, a screw which may be used for attaching the cut-off to its foundation or support when in place; H, shaft; I,.stuflingbox; J, wastepipe valve; K, service-pipe valve, L, valvecage; a, shoulder or projection on the inner end of the shaft H; b, sliding valve-support;

c, crank-pin or wrist-pin; d e, valve-stems, j',

spring; g, packing of stuffing-box, h, collar in stufling-box.

The device shown is by preference made of brass, and the body or central part, A, may` be made inthe form shown or any other suitable form, as desired. It is provided with three couplers, E, by means of which the pipes or the connections for pipes B C l) are attached. It is also provided with an extension, through which the shaft H passes,which is also adapted to be used in connection with the stuffing-box I.

This stuffing-box is of the ordinary construe' tion, it being provided with a slip-collar, h, and a packing, g, of rubber or other suitable material, to make the opening through which the movement.

shaft H passes water-tight. The shaft H passes through the stuffing-box, as shown, and it is provided with aweighted lever or crank-arm, F, the weight being sufficient to operate the arm in its outward direction. The inner end of the shaft H is provided with a shoulder, a, which, by pressing against the sliding valvesupport b, pressesthe valve K outward in its cage, and thereby opens it. Then the pressure of the shoulder is removed from the slide b, the valve K is reseated by the pressure of the water, and also by that of the spring f, which surrounds its stem c. The valveis also surrounded by a cage, L,which, in connection with the slide I), stem e, and spring j', prevents the valve from getting out or away freni an operative position. The shaft H is also provided with a pin, c,which is located away from the center of the shaft, so as to give it a crank movement when the shaft H is partly rotated. This pin passes through the inner end of the valve-stem d, so that a rotary movement of the shaft H either opens or closes the valve J, according to the direction of the Vhen the weighted lever F is lifted, the pin c being on the upper side,.as shown in Fig. 3, the valve J is drawn into its seat more closely and firmly, while the valve K is opened by the pressure of the shoulder t against the slide b. The water then passes in at B and out the pipe C, the .slide b being fluted or cut away as shown, so as to permit the water to iiow into the central part, A. By placing the weighted lever on the other side, then, when the weight is down, the valve J will be closed and a valve, K, opened; or by turning the shaft H half round, so that the pin c will be on the under side, then the weight in the position shown in Fig. l. will close the valve J and open theA valve K. The construction and operation, of course, are the same in all of these variations or changes ofthe weighted lever F and shaft H.

It will be seen from the foregoing description and from the drawings that the valve K cannot in any event be opened until the valve J vis closed. This arrangement prevents the owing of any water from the service-pipe right through and out at the waste-pipe, as is the case with ordinary constructions, where in a certain position of the valves both valves are partly open. It will also be seen that the ioo valve J cannot be opened until after the valve K is shut, as the stem d does not commence to crowd the valve J backward until the shoulder a severs its contact With the slide d, so 5 thatbythis arrangement of the shaft and valves with the Weighted lever the only Water which can escape through the waste -pipe is that which is standing in the pipe C When the valves are operated. As these cut-offs are frequently io located beneath floors and in places where it is difficult for the Waste-Water to flow off, it is important that as little'water as possible be permitted to escape, and by this arrangement the smallest possible quantity of Waste is 15 reached, as only the Water Which is in the pipe When the cut-*off is operated flows away, it being absolutely impossible for any Water to pass through from the supply-pipe to the Wastepipe, and by this arrangement I accomplish 2o thisy desirable object by the use of a single Weighted lever. r It Will be understood that the Weighted shaft is operated from above in the ordinary manner. i 25 n I do not claim the Weighted arm, nor do I claim, broadly, theuse of two valveslin a cutoff; but

What I claim as new, and desire to secure by Letters Patent, is as follows:

1. The combination of the shaft H, having 3o a shoulder, a, and pin c,With the slide b, operating valve K, and stem d, operating the valve J, substantially as and for the purpose speciied.

2. lThe combination of the Waste-valve J,

having a valve-stem, and the shaft H, having 3 5 l With a slide,` b, disconncted from but actuated 45 I by the cam on the shaft, the valve K, bearing against the slide, the spring f, and the cage L, said parts being arranged'to operate substantially as described.

JOHN GRAHAM.

Witnesses:

ALBERT H. ADAMS, O. W. BOND.

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