US1475175A - Valve - Google Patents

Description

Patented Nov. 27, 1923.

niTED STATES PATENT orties,

THEODORE DOUGLAS, OF SCARBORO, NEW YORK, ASSIGNOR TO DUPLEX ENGINE' GOVERNOR COMPANY, INC., OF BROOKLYN,

YORK.

NEW YORK, A CORPORATION OF NEW VALVE.

Application filed April 17, 1919. Serial No. 299,666.

To all wiz-0m t?? may concern.' y

Be it known that I, THEoDoRE DOUGLAS, a citizen of the United States, residing in Scarboro, in the countyof Westchester and State of `New York, have inventedicertain new and useful Improvements in Valves, of which the following is a specification.

Il have invented an improvement incregulating valves and operating means therefor; particularly a-'valve designedtobe utilized in connection with internal combustion engines and other prime movers for the purpose of responding to the action of a lgovernor and throttling the motive agent when the limiting speed of the engine is reached, and cutting olf the motive agent as soon as this limiting speed is exceeded.

The primary object of my invention is to provide a valve which is simple in construction and embraces relatively few parts, and of which the movable elements require to be actuated through only a very small distance to be caused to travel from full open position to fullY closed position and vice versa; whereby, after the limiting speed is once reached, a very small increase in the speed of operation will cause the valve to be closed entirely, and a very small decrease below the limiting speed will cause' the valve to return to full open position; thus enabling the engine to be controlled in a quick and' accurate manner by the governor as the latter acts in accordance with changes in engine speed.

A further object of my invention is to provide a valve which comprises a number of relatively movable parts or elements, all of which are connected together so as to operate in unison, and which require to be moved through only a short distance; in order to stop th-e flo-w' of motive agent through the supply conduit to the engine; or, after thus cutting off the motiveV agent, to restore free communication between the engine and the source from which said motive agent is derived. e

- Another object of my invention is to provide a valve comprising shutter elements which not only throttle but also' give a very advantageous mixing action.

rhe above and other objects of my invention will clearly appear in the following description, taken in connection with the accompanying drawings forming part of the same; and the characteristics of my inventio-n will be precisely dened in the appended claims. I do not wish to be limited, however, to the exact embodiment herein shown, but I reserve the right to make changes in the structure by which my invention is practiced, especially as regards the shape, size and arrangement of the parts of the same, within the scope and spirit of my invention, consistent with the general meanings of the terms in which the claims are expressed, and as indicated by variations in the wording of the same.

On the drawings:-V Y

Figure 1 is a longitudinal section through a. construction made according to my invention; Figure 2 is a top planof a part of whatl is shown in Figure l, illustrating the elements composing the valve;

Figure 3 presents a detail of what is shown in Figure l; and

Figure 4 is an outside end view of what is shown in Figure A1. l

rThe same numerals identify the same parts throughout.

In the particular description of the construction shown in the drawings, I show at l a housingfor my improved valve and the means for operating same. This housing is preferably made in two sections; one of which, indicated by the numeral 2, has a passage 3 through it, and is provided with a valve l; preferablymounted at one end of this passage. The valve 4E is made up of a number of elements arranged parallel with one another, and it is moved to open or closed position by a governor 5 arranged in the other section 6 of the housing l, which is bolted or otherwise secured'to the section 2. The section 2 is arranged to be insertedin the line of a conduit, such as the intake pipe of an internal combustion engine; and the governor 5 comprises centrifugally actuated weights, driven in accordance with the speed of the engine, to throttle the motive agent flowing Vthrough the conduit 3, when the engine reaches its limiting speed, and to cut ofi' this motive agent as soon as the 'limitingspeed is exceeded. To enable the housing 1 to be supported in operative position both ends of the casing 2 will be fianged or otherwise shaped to permit adjacent ends of sections of the intake conduit to be bolted or otherwise fastened to same.

@ne end such as the Lipper end of section 2 is counterbored to provide a shoulder 7 against which fits a ring 8 in which the valve 4 is supported. rlhis ring 8 will have a flange 9 to engage a shoulder lO provided in the adjacent end of the section 2, and it will be secured in place by screws or other suitable fastening means.. The opening through the ring 8 is indicated by the nuF meral 11 and this opening has such an out line, that it can be controlled by a number' of parallel elements12 which have the formof shutters and constitute the valve 4. The elements 12 are fixed to spindles or shafts 13, which are pivotally mounted in the ring 8; or these elements may have trunnions at their ends which also pivotally engage the ring 8; and each element 12 will have a pair of rigitL arms 14 adjacent the middle of same. The arms 14 on each element are joined by a pin 15; and all the pins 15 are connected Vby a link 16, pivotally engaging the pins, and disposed between the arms 14 of each element 12; and through the link the arms 14 canbe actuated and the elef ments 12 moved. i

As shown Vin Figure 1, each of the shutter elements 12, has its opposite faces parallel, because each of them is shaped somewhatlike a parallelogram. or rhombus in crosssection. That is, the elements contract towards their sides, because the opposite faces converge towards the lateral edges of the elements 12. Owing to the shape and arrangement of these elements, the passages through the valve first contract, and then expand, bothwhen the valve is in full open position and for every other position except "closed position'. In other words, the passage between any two elements 12 resembles to some extent, a Venturi tube,the function and purpose of which l shall mention again later.

Adjacent the opposite end of the passage 3 I mount a transverse spindle 17 which serves as a journal for a hub 18. dle engages the opposite sides of the section 2; being mounted in bosses or bearings 19 and held against endwise displacement in any suitable manner. The hub 18 is rigid with a pair of parallelV operating arms 2O connected at their outer ends by a transverse brace 21. kThese outer ends are notched and engage one of the pins 15 the arms 14 bearing this pin being received between the notched ends ofthe arms 20, as indicated in Figure 3. Nearer to the spindle 17, these arms 2O are also connected by a stud or the like 22 which is engaged by a notched head 23. The latter is in the form ofa split nut,

rhis spinadjustably mounted on an actuating element or rod 24, kwhich is adapted to be recipro cated by the governor; andwhenever the governor exerts sufficient thrust against element 24, the valve is closed. The element 24 engages screw-threads in the nut 23, which is pinched after splitting, to make it grip the rod 24; and extends'across the passage 3; and between the nut 23 and one side of the passage is a coiled spring 25 encircling the element 24 and engaging both the section 2 and the nut 23; and acting to oppose the action of the governor 5 on the element 24. This spring tends to hold the valve in open position, and must be overcome by the governor before the valve can be moved.

' At the point where the spring 25 is located,.the section 2 has an external boss 26.

This boss is openat its outer end and has a relatively large threaded bore; and the inner end of this borecommunicates through a suitable aperture with the passage 3. The aperture in question is in line with the element 24, which projects therethrough into the bore of the Lboss 26, and terminates in a kerfed head 27. I use a recessed nut 28 to engage the boss 26 and close the same, and this nut has an` aperture to register with a recess 29 in the edge of the boss; so that a locking member may engage both the aperture in the nut 28r and the recess 29, andV fastenthe nut 28 in closing position. Any .kind of suitable locking member 30 may be employed; and whenever the locking member is removed, the nut 28 can be unscrewed 'and the' kerfed head 27 engaged by a tool to adjust the element 24 in the head 23. lf desired the element 24 may be reducedfor grooved just behind the head 24, toen'able it to be engaged by'a tool held in the hand, andy pulled to try the force of the spring 25. n

The governor is actuated by a rotatable shaft 31, in line with the rod 24, and mount* ed in a suitable bearing 32 in the side of the section 2. The bearingin question is lined as at 33, and a washer 34 in this bearing encircles the rod 24 to prevent leakage-between then sections 2 and 6. The shaft 31 is hollow andzone end of the same abuts this packing. It contains a member 35 of considerable mass, and the rodr 24 projects through the washer 34 into the shaft 31 so as to engage one end ofthis member. The opposite end of this member isV arranged in proximityto a pair of longitudinal slots in the opposite sides of the shaft 31, and through thesel slots projects a bolt or the like 37 carried by a sliding head 38 mounted on shaft 31. `Near the yoppositefend of the shaft 31 is a similar head 39, fixed to the shaft and heldv `against movement; -and the two heads 38 and 39.are connected by links to the governor weights and separated by "an intervening spring 40, which normally acts against the vsliding head 384 to bring the links into alignment 'and hold the governor weights as close `to the shaft as possible. The opposite end of the shaft 3.5 is mounted in a bearing provided by a boss 41v in the section 6, which also is provided with a lining33.

The` mode of operation of the construction thus far described, will now be apparent. Whenever the engine reaches its limiting speed the rotation of the shaft'131, through the centrifugal actionA of the' governor weights, draws the head 38 towards the head 39; compressing the spring 40. Thus a thrust is exerted through the pin 37 on the member 35, 'pushing against the rod 24to move the arms 2O to the left, as shown in Figure l, and turn the elements 12 toward closed position. The valve 4 will be entirely closed as soon as the limiting speed is exceeded. Normally there -will be a slight space between the member 35 and the pin 37, and this member, besides having considerable mass will have frictional engagement with the inside of the shaft 31. This construction serves to absorb jars and shocks and prevents erratic movements of the governor from actuating the valve. Hence the governor responds only to speed factors and 1s rendered immune from vibrations and jolting; and the valve 12 is enabled to be moved only as required.

The section 2 also carries a device such as a screw plug 42, which is adjustable, and

abuts one end of the link 16. The opposite end of the link 16 has a projection which is received by one end of a spiral spring 43. This spring is located in a recess in the bottom of the member 8 and protrudes into another aperture through the side of section 2. At its opposite end the spring engages a projection on a nut 44. Obviously by turningV the plug 42 the full open position of the valve can be adjusted, and by turning the nut 44 the tension of the spring'43 can be regulated. Y

Section 6 is also provided with an extension 45 fixed in a seat in the outer end of the boss 41. The end of the shaft 31 in this boss has its bore made polygonal yin crosssection to receive the correspondingly shaped end of a drive shaft 46. The extension 45 carries a washer 47 fitting against a shoulder in this extension, and surrounding the shaft 46 v; and Vthis shaft, which may be a liexible shaft or any other kind of shaft, l

is disposed in a suitable tubular casing 48. This casing is encircled by a bushing 49, which lits the casing snugly and abuts the extension 45. This bushing is encircled by a sleeve 50 which is conical on its inside, and is provided with screw-threads to enable it to bejoined to the extension 45. As shown in Figure 1, when'the sleeve 50 is turned up, it draws one end of the bushing 49 tightly a head through which passes a ring 52 en-V circling sleeve 50. The ring mayhave a cam member 53 to engage the sleeve 50 and Adraw the ring tight.

lBy adjusting the element 24 with reference to the head 23, the speed at which the member 35 will thrust against the rod 24, can be varied at will, andyby adjusting the nut 44 the spring 43 can be regulated. This spring insures a quick return of the valve to open `position as soon as the speed of the engine is reduced. By manipulating the rod 24 with a tool and by turning the nut 44 or they screw 42 all the necessary adjustments can be obtained. A v

The shape of the elements 12 above referred to gives a Venturi-tube efect, and

makes the valve not only throttle the motive agent flowing through the passage 3 but also gives a good mixing action, distributing gasoline particles more evenly through the mixture; whereby the fuel is rendered very uniform. My valve thus not only serves to throttle and govern the engine, but also enables it to run more advantageously during normal operation; and proper combustion and higher eiiiciency are secured.

. An oil hole is provided at the top of section 6 and a drain hole at the bottom; with removable screw plugs'to it the same.

The arms 20 may converge or be bent towards each other at their notched ends if desired to receive the two arms 14'of one element 12 snugly between them.

Having described my invention, what l believe to be new and desire to. secure and protect by Letters Patent of the United States is 1. A valve embracing a plurality of movable elements arranged side by side to provide parallel passages, said passages ex- `panding and then contracting to give a Venturi-tube elfect for all positions of valve except closed position.

j 2. A valve comprising a plurality of pivotted shutter elements arranged side by'side to provide parallel passages, said passages contracting and then expanding to give a Venturi-tube effect for all positions of the valve except closed position.

3. A vlave comprising a plurality of shutter elements having their opposite faces parallel and contracting in thickness towards their lateral edges.

4. A valve comprising a plurality of parallel shutter elements, a pair of arms connected to each, pins joining said arms, a link pivotally connected to said pins, a notched arm engaging said link, and an element for actuating said notched arm.

the

5. In a valve construction, ahub, a pair of parallel arms thereon and rigid therewith, said arms havin notched ends,y and a transverse brace and a stud connecting said-arms. n

'6. The Combination of a valve comprising 4a plurality of shutter elements, a lin-k connecting said elements, an adjustable spring abutting one end of said link, and an adjustable device for engaging the opposite end of said link.

7. A valve comprising pivotally mounted, parallel shutter elements, arms thereon, alink connecting the arms, an adjustable stop at one end of the link, an adjustable spring engaging the opposite end of said link, an

arm for operating the link and an element for actuating said last-named arm.

8. A valve comprising a plurality of pivoted, parallel shutter elements, said elements having yaces converging towards each side to givefa Venturi-.tube effect.

9. A valve comprising a plurality of parallel, pivoted Vshutter elements having faces converging towards each side to give a Venturi-tube effect, apair of arms on each element, a pin joining the arms of each elementa link between the arms of each element ,and connecting said. elements together, apair of notched arms receiving the arms of one shutter element between them and engaging the pin thereof, a head having a notch between said operating arms, a stud extending between saidoperating arms to engage the head, and anelement to engage the head to actuate the latter.

In witness whereof, I` have signed my naine to this specification this 27th day of February, 1919.

THEODORE DOUGLAS,

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