US1225617A - Injector. - Google Patents

Description

1. w. GRANTLAND.

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APPLICATION FILED AUG. 9| I9I5.

Patented May 8, 19,17.

.l/vimoma i. a. M Wy M @www JOI-IN W. GRANTLAND, 0F CINCINNATI, OHIO.

INJECTOR.

Speccaton of Letters Patent.

Patented May s, rait'.

Application filed August 9, 1915. Serial No. 44,511.

To all lwhom t may concern.'

Be it known that I, JOHN 1V. GRANTLAND, a citizen of the United States, and residing at (315 McMillan street, Cincinnati, in the county of I-Iamilton and State of Ohio, have invented a new and useful Improvement in Injectors, 'of which the following specification is a full disclosure.

My invention relates to injectors and primarily to the means for manually controlling the final overthrow or waste valve and steam' admission valve, and has for its object the provision of valve controlling connectoi' means having its parts positively joined and available alternately for simultaneous or independent valve control. Y

Further, the invention relates to the relative construction and arrangement of the parts, whereby they automatically effect a union for simultaneously or normally operating tlie valves subsequently toA determinate independent valve controlling motion toward coincident limits or degrees of motion.

It is often desirable in the use of injectors to convert its utility from that of 'feeding a boiler to heating the feed water by blowing steam through the suction passages. In the latter instance, it is desirable to preliminarily close the overflow valve before opening the steam admission valve, to affordl no opportunity for the formation of a jet within the tubes of the injector', the steam following a path open to it through the injector casing to the suction pipe and feed watei' tank for heating the water in the tank.

yThe drawings disclose a preferred embodiment of the invention, and forni a part hereof, wherein like characters of reference designate corresponding parts throughout the several views, of which Figure 1 is a longitudinal side elevation of an injector with the herein described improvements, the overflow valve connections to which the invention is primarily directed, are shown in their normal condition in full line, and in an alternate position in dotted lines.

Fig. 2 is a detailed perspective view of the handle end of the overflow valve pull and connector link.

The injector to which my improvement is applied-represents a commercial type of injector, with its details of construction Well known in the art so as not to require specific description or illustration herein.

1 represents the injector casing containing the usual steam admission valve, final overflow valve, (not shown), adapted to be simultaneously or independently operated for variously controlling the injector. The injector is provided with the pipe coupling boss, of whichi 2 represents the steam inlet, 3 the water inlet, 1 the overflow outlet controlled by overflow valve and 5 the outlet to the boiler. A valve stem 6 connects with the overflow valve which passes the stuffingbox fittings 7, the stem 8 of the steam ad mission valve passes through the stuffing-box fitting 9 and is operated by a hand lever 10, which is mounted on the injector' casing'by a pivot and link connection 11. The stein 8 is shown as pivotally connected at 12 to the hand lever 10. The stem 6 of the overflow valve is pivotally connected to a bell crank lever 13, by means of a short link 14. The bell crank lever 13 is pivotally mounted on a bearing bracket 15, fixed upon the easing of the injector. A pull connector link 16 pivotally connects with the arm 17 of the bell crank lever and extends to the hand lever 10 to connect therewith and has its free end formed with a handle 18. ri clevis link 19 is pivotally connected to the link 1G and to the hand lever 10. r1`he link 1G, is notched, as at 20, to confiningly receive the hand lever connected end of thel clevis link for unitarily or sin'iultaneously moving the link 16 with the hand lever 10. r1`hc clevis -link may be referred to as an eccentric link for swiveling the link 16 upon an axis of thehand lever 1G, to move with the hand lever or to swing the link 16 about such axis to move independently of the hand lever. The clevis link 19 comprises a pair of arms which engage upon opposite sides of the connecting link 1G, projecting integrally from the tubular shank 21, its periphery fitting the notch 20, and connected to the hand lever 1() by a stud bolt 2Q cngaged through the base of the shank. Thus with the link and lever parts in their relative connection position,l as shown in full lines Fig. 1, the steam admission valve and overflow valve are connected for simultaneous control with the movements of the hand lever 10. For normal operations of the injeetor under such condition the connecting link in the movements of the hand lever fulcrums upon the stud bolt 22. The axes of the clevis link are relatively in a diametric plane longitudinally with the link 16, or its valve operating directions of motion, or in a dead central position, neutralizing the clevis link as an intermediate pivoted connector, for an independent control of the valves, as in instances where it is desirable to use the injector for heating the feed water by blowing steam through the suction or water intake pipe connecting with the coupling boss 3.

In starting, it is necessary to have the overflow valve closed before opening the steam admission valve. This prevents the formation of a jet within the tubes of the injector, and the steam follows the path open to it through the chamber of the injector' casing to the suction pipe and feed water tank. With the link 16 connected with the hand lever 10 through a link as an intermediate, by swinging the handle end of the link in an upwardly and forwardly direction, the link can be operated independent of the lever 10 for closing or controlling the overflow valve in advance of the control of -the steam admission valve. The clevis link provides a compound fulcrum for the pull link 16 to impart the necessary valve controlling motions without disconnecting the link from the lever 10.

Thus the pull of link can be moved to the position shown in dotted lines, Fig. 1, after which the hand lever 10 may be freely moved to the degree desired for controlling the steam admission valve. Moving the hand lever to the left causes the clevis link to swing upon the fulcrum connecting it to the pull link alternating the axis about which it swivels. The parts are automatically restored in their position for normally operating the injector by continuing the motion of the handle lever until the shank of the clevis link rengages within the notch in the pull link. The free end of the pull link descends or moves toward the link shank by gravity during the valve opening motion of the hand lever 10, when the injector is mounted to dispose the pull link in a horizontal plane, but it is obvious that tension means could be provided, if found necessary, to mount the injector in any other than a horizontal plane.

Connecting the pull link to the hand lever by an intermediate link provides a positive connection between the parts for definite coordinate control of the valves simultaneously under a normal use of the injector, offering no lost motion between the parts as in types wherein the connections are separable for accomplishing the different valve controlling results.

It is obvious that a plain intermediate link could be utilized in place of the clevis function of link employed, but the latter is preferable, in that it provides for freer swing, and also more rigidly confines the link in its normal injector operatingposition.

I claim:-

`1. In a device of the class described, a valve rod mounted and slidable in a stationary support, a lever connecting with said valve rod, a valve operating rod pivotally connected at one end to valve operating devices, and a link member connecting said valve operating rod to said lever, and relatively arranged to adapt said valve operating rod to be moved independent of the lever7 or with said lever and rst named valve rod.

2. In a device of the class described, a lever, a valve rod directly connected with said lever to be reciprocated thereby, a second rod longitudinally extending in a direction at an angle to the lever and arranged to pivotally connect with said lever for unitary motion of said connected members, and a link connecting said lever and second rod, adapting said second rod to be swung about said pivotal connection for said lever and second rod for moving said second rod independent of the lever.

3. In a deyice of the class described, a lever, a valve connecting with and controlled by said lever, a link member Vpivoted upon said lever, and a valve operating rod pivotally connected to said link member adapted for swinging said rod and link about the link lever pivot for rod motion independent of the lever, said rod arranged to separably engage said link lever pivot for neutralizing the link and combining the parts for unitary motion.

4. In a device of the class described, a lever, a valve connecting with and controlled by said lever, a valve operating rod extending in a direction lateral to the lever, and a link connecting said lever and rod, said rod being adapted to move with said link to bring the rod into engagement vwith the link lever' pivot to join the parts for unitary motion and alternately for swinging said connected rod and link about the link lever pivot for rod motion independent of the lever.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

JOHN W. GRANTLAND.

Witnesses:

L. A. BECK, G. G. BROWN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. O.

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