USRE12755E - Throttle-valve - Google Patents

Description

No; 12,755. REISSUED'PEB. 25, 1908.

J1 S. CHAMBERS. THROTTLE'VALVE.

APPLICATION, FILED 33.19. 1907.

2 SHEETB-SfiEET 1.

1 77" Q 6 ,2 J f 52 ML y Y REISSUEDTEB. 25, 1908.

5. s. CHAMBERS. THROTTLE VALVE; APPLIQA'TIOK FILED FEB. 19, 1907.

2 SHEETS-SHEET 2.

4 in. Wa'kllimw fla arrangement of 7 over and UNITED STATES PATENT OFFICE- JOHN S. CHAMBERS, OF ,WILMINGTON, NORTH CAROLINA.

THROTTLE-VALVE.

Specification of Reissued Letters Patent.

Reissued Feb. 25, 1908.

Original No. 816.217. dated March 2'7. 1906. Serial No. 254.947- Application for reissue filed February 19. 1907- Serial No. 358,334-

To all whomit may concern: Be it known that 1, JOHN S. CHAM ERS, a citizen-of the United States, and a resident of Wilmin on, in the county of New Hantate of North Carolina, have in* vented a new and useful Improvement in Throttle-Valves, of which the following is a specification.

My invention relates toan improvement in throttle valves and has for itsobject to provide means projecting into the stand pipe to a point beneath a valve for opening and closing the same.

A further object is to rovide a deyice in which the m'ovement'of the means for opening the valve is increased after thevalve has been started from its seat so as to insure a rapid 0 ening of the valve. I A sti further object is to provide certain improvements in the construction, form and ,the several parts whereby the valve may be operated in a very simple and easy manner.

A practical embodiment .of the invention is re resented in the accompanying drawings in w iich V Figure 1 represents the stand pipe and valve in top plan, Fig. 2 is a side View of the having its seat same, Fig. 3 is a cross section'taken inthe plane of the line AA of Fig;- 4, Fig. 4 is a view in side elevation artially in section taken in the plane at rig t angles to Fig. 2 Fig.- 5 is a view in side elevation partially in section. of a modified form of throttle valve, and Fig. 6 is a detail vertical central section showing a third form of throttle valve.

The stand pipe is denoted by 1 and isherein'shown as straight and arranged vertically. In the form shown in Figs. 1 to 4 inclusive, the throttle valve comprises an outer valve 2 3 on the top of the stand pi e and an inner valve 1 having its seat 5 at tile center of the outer valve 2. The outer valve 2 is provided on its to with two lugs 6 and 7 arranged diametrical y opposite. A crossbar or'bolt 8 engages the two lugs and is re- ,movably held in position by means-of a nut 9.. This bar is so arranged that after'tlie inner valve 4 has been raised a short distance 1t will engage the bar and lift the outer valve 2 with it the remaining portion of its movement.

The inner valve 4 is rovided with a 10 which is fitted to side in a centre a ranged cylinder 11 uprising from the 0 present instance,

entirely through the of free access to a point within the peripheralw plane of the stand pipe for attaching the operating lever to the valve rod without working through the wall of the stand pipe. The inner valve 4 is further provided with a valve rod 13 which depends therefrom.

The-rod 13 is guided in its reciprocating movements by providin a cylindrical socket 14 extendingdownward y from the chamber 12, within which socket the lower end 15 of the valve rod is located.

The stand pipe, is provided with two outwardly projecting lugs 16, 17, upon op osite sides of the chamber 12, between WlllOE lugs is-pivoted at 18, a two- armed rocking lever 19, 20. The arml9 of this cking lever extendsinto the chamber 12 a l its free endis engaged with the inner valve 0d 13. In the this engagement is arranged y forming a tongue 21 on the end of the arm 19, which tongue is inserted. through the valve rod. v

An operatin lever 22, 23 is pivoted at 24 between two ugs 25, 26, projecting outwardly from the stand, ipe 1 at a short dis tance below the rocking ever supporting lugs 16, 17. The operating lever 22, 23, may be rocked by any suitable mechanism, not shown herein, which may be attached to the lower arm 23 of said lever. 22 of the operating'lever is connected to the lower arm 20 of the rocking lever as follows. The arm 200i the rocking lever is bifurcated forming a recess 27, into which recess the upper end of the arm 22 of the o crating lever extends. A hole 28 is forme lever'arm 22 through which hole a small pin 29- passes, which pin is secured to the lever arm 22. The relative diameters of the pin 29 and the hole 28 are such that lever arm 22 is rocked inwardly, the pin 29 will not be engaged by the wall of the hole-28 until the arm 22 has been moved a short distance. The lever arm 22 is further provided with a lateral flange 30' which engages .the extreme end of the lever arm 20 at a point a short distance below the pin and' hole connection 29, 28, when the lever arms 20 The upper arm I in the when the toward the pivot communication to the and 22 are at or uuwr. we Merits of their outward movements.

In operation, when it is desired to open interior of the standpipe, the operating lever rocked in position 1 to move the arm 22 inwardly. This arm because of the engagement r its flange 30 with the free end of the arm 26 of the'rocking v lever, will move the arm 28 inwardly, thus l moving the arm upwardly and with it the inner valved. During the first part'oi this movement a great advantage of leverage is shtained because of the engagement of the.

arm 22 of operating lever when it is piveted with the arm at the greatest distance from its pivot. Alter the inner valve has been started from its seat and the arms 22 and 29 are rocked inwardly a short disterms, the outer wall of the hole 28 will engage the pin 29, thus shifting the leverage of the rocking lever- 20.

a The continued inward moverh'entof the arms from its seat.

a double valve,

22 and 20 may be accelerate :"beoause of this shifting of leverage. This will-accelerate the movement of the inner'valve 4 and. because of its engagement with the rod 8 of the outer valve will also rapidly lift the outer valve,

' I In the form shown in Fig. 5, I have shown the lower member being denoted by '31, its seat by 32 and the outer member by 33 and its seat by 34. Inthis I instance, both the members 31 and 33 of the valve are raised simultaneously. In this form I have shown the operating lever as connected to the rocking lever by a and elongated slot connection 35, 36;. n this form also, the steam may he admitted to the l interior oi stand pipe downwardly be tween the valve member 33 and its seat 34 and upwardly between the valve member 31 andits seat when the valve is open.

In the iorm shown in Fig. 6, the inner valve is shown as provided with wings 37 spaced a short distance beneath the outer valve, which wings are arranged to engage the bottom of the outer valve and raise it 1 after the inner valve has been startedfrom l its seat.

What I claim is:

1. In astand pipe, a valve, its seat, and

means for opening and closing the valve arranged to automatically reduce its leverage inner valve and means and there by valve after it has been started fromits seat.

increase the movinmbf the i 2-. In a stand pipe, innerand outer valves,

their seats, and means for openingand 0105-, ing the valves arranged to automatically redoes its leverageand thereby raise the valve rapidly after the inher valve' has'been started from its seat,

3. In a vertical stand pipe, inner and outer valves, their seats, aninner valve rod, a rocking lever engaging t e inner valve od at a point within the stand pipe beneath the rocking lever to rimarily lift the inner valve and secondarily 'ft the outer valve.

4. r In a stand pipe, a valve, a seattherefor, a valve rod, a rocking lever engaging the rod and an operating lever arranged to'shift its connection with the rockinglever after the valve has been started from its seat to mcrease the movement of the valve.

5. In a stand pipe, inner and outer valves, their seats, an inner valve rod, a rocking lever engaging the same, and an 0perat lever arranged to shift its connection Wit the rocking lever to increase its speed after the inner valve has been started from its seat.

6. In a stand pipe ber extending lateral ytherein and permanentlyopen to the exterior of the stand'pi e and normally closed to the interior of t e stand 7 i e, a valve in the Wall of the chamber provide with a valve operating mg into the chamber and an operating lever connected'wvith the IOdDfSfilt: valve within said chamber. g

' 7. In a throttle-valve construction, the combination of a su ply-pipe having a concentric steam-chain an open-ended chamber extending into said pipe adjacent to said steam-chamber, a throt-= tle-valve disposed in said steam-chamber, and means extending into said open-ended for operating the rovided with a cham- 4 or at one end thereof,

rod extend- I chamber for moving said valve longitudinally of the end of the suppl spipe.

In testimony whereof that claim the foregoing as my invention, I'have signed my name in the resence of two witnesses this 14th day of eb.,'1907. V

. QIOHN S. CHAMBERS; Witnesses: p

:J. CHAMBERS,

J. P. Wnvoo, Jr.

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