US2107990A - Method and apparatus for governing fluid flow - Google Patents

Description

Feb. 8, 1938. w. E. LEIBING METHOD AND APPARATUS FOR GOVERNING FLID FLOW Filed Jah. 50, 1955 2 Sheets-Sheet l IIIIIII A Feb. 8, 1938. w. E. LExBlNG 2,107,990

METHOD AND APPARATUS FOR GOVERNING FLUID FLOW Filed Jan. 5o, 1935 2 sheets-sheet 2 /5 ,a l5 /Z V//umm l.

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y l a WJ 1 FF-z 5v 67 S11/tim Will/Um E Leib/)79 Patented Feb. 8, 1938 METHOD AND APPARATUS FOR GOVERNING FLUID FLOW William E. Leibing, San Francisco, Calif., assignor to Leibing Automotive Devices, Incorporated, SanFrancisco, Calif., a corporation of Nevada Application January 30, 1935, Serial N0. 4,154 13 (llaims.` (Cl. 137-4152) This invention relates to methods and apparatus for governing the rate orquantity of fluid flow through a conduit, and more particularly, to methods and apparatus designed for use in association with the intake manifold of a combustion engine for the purpose of automatically preventing the latter from operating above a predetermined maximum speed, and is intended as an improvement over the apparatus and methods disclosed in my copending applications S. N. 614,- 533, filed May 31, 1932, now Patent No. 2,026,947, granted Jan.- 7, 1936; S. N. 659,893, filed March 6, 1933, now Patent No. 2,026,948, granted Jan. 7, 1936, and S. N. 738,114, led August 2, 1934, and now Patent No. 2,081,825, granted May 25, 1937.

More specifically, this invention relates to improvements in fluid flow governing in response to fluid velocities, aided when desired by pressure diiferentials; and thepreferred embodiment is of the throttle valve type inserted in a conduit conducting the uid flow to be governed.

The disadvantages and objections attendant upon prior devices of this character have been discussed to some extent in the above identified application. In addition to such disadvantages and objections, further undesirable characteristics have appeared which are eliminated by the present invention;

In any governor of the so-called velocity type, two different conditions of `operation occur which make it desirable to have two different settings in the governor. 1

Assuming a governor to'be employed in connection with an internal combustion engine, the first of these conditions occurs when the engine is working under full and nearly full loads at speeds just below the governed speed. This condition requires that the governor elements oifer the least possible restriction to fluid flow in order that full power may be developed and maintained, and also requires that the governor vane or varies must remain in a full open position in order that these requiredows may be maintained.

The second condition of operation is when the engine is operating under light or negligible loads and where very little vfluid or fuel mixture is capable of taking the engine toA speeds above the desired governed speed. Y

It is therefore apparent to one skilled in art that a governor which may fulfill the requirements of the first condition, i. e., when the engine is working' under full and nearly full loads at speeds just below the governed speed, will necessarily, under partial throttle and light load,

the

allow the `engine `to far exceed the .governed speed.

To put the above diiferently, a true velocity governor, when set to trip at 1,000 units of mixture per second, should remain stationary, and in full open position at a Iiow of 950 units of mixture per second. Yet, it is apparent that if an engine requires 1,000 units persecond under full load, 950 units per second will, under light load, drive the engine at a much higherR. P. M. than 1,000 units per second under full load.

This condition is aggravated by the diversion of fluid flows through the governor by the carburetor throttle inV a manner that in throttled position'tends to render the governor partially inoperative.

It is therefore obvious that at least two entirely different conditions of operation occur which` ther, assist the governor vane or vanes by adding a .guide vane to the carburetor throttle in a manner to increase the closing effect of the flow of the fuel mixture when the carburetor throttle is in the so-called throttle cheat position. While both methods have proven to be satisfactory to some extent, I have found that many irnp-rovements may yet be made from the viewpoint of installation and operation.

Means, other than those above described, have been employed with a view to correcting the above described condition, such for instance as piston cylinder arrangements, the piston being operated by a differential between the vacuum within the governor or fuel conduit and a source of pressure such as the atmosphere and arranged to actuate thegovernor valve. Such arrangements are difficult to maintain in lproper Working order by reason of the accumulation of dirt and grit therein? Being operated by atmospheric pressure, a dishonest operator has only to apply adhesive tape or likesealing means to the rexterior of such devices to shut off ratmospheric pressure and render them inoperative, and'thereby defeat thepurpose of the entire governor.

the governing mechanism being thereby increased, particularly at relatively low rates of ow Y. I

A further object of this invention is to provide novel means in combination with a governor valve whereby a response of the governor valvel at any desired rate of fluid flow or engine speed is asl-V.

sured by reason of a correct concentration or distribution of the fluid flow bysaid means.

- Still a further object of this invention is torprovide novel means in combination wth'a governor whereby adjustments within thegovernor need not be made for different throttle, openings or-different load conditions, said means acting in effect to produce different settings or adjustments on the governor whereby the latter ls responsive under all conditions at which its action is desired.

A further object of my invention is to provide novel ow directing means associated with al governing valve of an engine -insuch manneras to concentrate the kinetic energy of the indrawn fuel effectively upon the governing valve in subst-antially all positions'of the latteigthe directing means being rendered substantially inoperative at stages of operation where it is not required.

Still a further object of my invention is to provide a novel type of governor for a fluid flow conduit whereby the fluid flow therethrough is directed, particularly at relatively narrow throttle openings, to the actuating portions of the governor valve and away fromtheL remaining portions thereof, thereby increasing thediiferential or the velocity factors arising from the fluid flow, and increasing the sensitivity of the governor.

A further object of my invention is the provision of a novel method of governingof a fluid flow in combination with a kfluid flow controlling means wherein at restricted-positions of said latter means the fluid flow is concentrated upon the actuators or power elements ofthe governor employed, the concentration being discontinued'after the uid flow controlling means has been opened to a degree to permit a flow offluid sufficient to operate the governor v without the necessity of concentration.

Still a further object of my invention is thevpr'ovision of a novel method o f operating'the governor for fluid flow control, the governor comprising a power or actuating element and a stabilizing or balancing element, wherein at' stages Where only relatively low fluid flows arepermitted, said fluid iiow is concentrated upon thepower or actuating element of the governor and is` diverted from the balancing or stabilizingrelement o f the governor, whereby substantial increases in the closing force of the actuating or power element are effected. 4

A further object of my invention isA to provide a combination of fluid flow controlling means such as a throttle valve, witha fluid-'flow controlled governor involving a power element, novel means being provided to positively concentrate the flow of fluid upon the power element throughout a major portion of the range of operation of the fluid flow controlling means.

A further object of my invention is the provision of a combination of a iiuid flow controlling means such as a throttle valve with a fluid flow controlled governor involving a power element, novel means being provided to concentrate the flow of uid upon the power element throughout the major portion of the range of the fluid flow controlling means, the concentrating means being rendered inoperative and substantially removed as an obstruction to fluid flow when the fluid flow controlling means is set to permit relatively large flows.

Still a further object of my invention is the provision of uid flow controlling means in combination with a fluid flow controlled governor involving a power element and a stabilizing element, novel means being provided to concentrate the flow of fluid upon the power element throughout the majorportion of the range of operation of the fluid flow controlling means, the means serving to divert the fluid flow from the stabilizing or balancing elements, whereby substantial increases in the closing force of the actuating or power element are effected.

Still a further object of my invention is the provision of iiuid ow controlling means in combination with a fluid flow controlled governor involving a power element and a stabilizing element, novel means being provided to concentrate the flow of fluid upon the power element throughout the major portion of the range of operation o-f the fluid iiow controlling means, the concentrating means serving to divert the uid ow from the stabilizing or balancing element and materially increase the torque effecting closing of the governor blade whereby in effect different settings or adjustments of the governorV are accomplished in accordance with the position of the fluid flow controlling means thus avoiding the necessity of adjustments within the governor of the means normally tending to oppose closing movement thereof.

A further object of my invention is to provide a novel governor for fluid flow control, the governor being designed to operate under all conditions of operation and constructed in a manner whereby attempted tampering as by an unauthorized person to render the governor inoperative is de- .feated.

A further object of my invention is to provide a novel governor, particularly for use in internal combustion engines as employed in motor vehicles, wherein operation of the governor is assured under all conditionsL of operation, particularly under so-called throttle-cheat conditions.

Still a further object of :ny-invention is the provision of a governor, particularly adapted for use on the engines of motor vehicles wherein novel means are provided for the insurance of operation of the governor under all conditions of operation, and particularly under throttle cheat conditions, the means being wholly mounted within the governor and being of a nature whereby substantially no obstruction is offered to fluid ilows at stages where unobstructed free flow is desired.

A further object of my invention is'to provide a novel governor, particularly for use on engines as employed in motor vehicles, wherein` proper operation of the governoris vassured under all conditions of operation, particularly under socalled throttle cheat conditions, the governor `being self-contained and requiring no special ele-y ments attached to the carburetor'or otherelement of the engine whereby the governor-.can b readily installed in existing devices. i

Still a further object of my invention is'the pro- Vision of a novel form `of governor, particularly adapted for use on the engines of motor vehicles and automatic in operation under all conditions of operation of the motor Vehicle, the elements of which are relatively simpleand easily assembled and the cost of which is accordingly reduced.

Still a further object of myfinventionV is to provide a novel governor for use on engines-'fof motor vehicles, wherein under full loads, full mixture requirements are passed without obstruction thereof and under partial or no load-s, the engine speed for which the governor is set 'at full load cannot be exceeded. p A Y Still a further` object of'my invention is the provision of novel means forinstallation in prior types of governors wherein operation of such governors under all conditions is assured, the means being relatively cheapand comparatively easy to install. K

A further object of my invention is to provide novel means for installation on governors to insure the correct operation thereof under all conditions, the means being capable of readyadjustment to the features of present installations as, for instance, the varying location' of Jthrottle valves. Y

Additional objects, many of a subordinate or more specific nature will appear from a study of the following detailed description and the claims appended thereto whentakenin connection with the accompanying drawings, wherein:

Figure 1 is a side elevation taken in partial section of a preferred embodiment of the present invention and showing a governor arranged in combination with a portion of an intake manifold of an internal combustion. engine and a portion of a carburetor containing a throttle valve, the throttle valve being shown in wide open position.

Figure 2 is a view similar to that of Figure 1, but with the carburetor throttle only partially open in approximately a so-called throttle cheat position, at which position,`r under light loads, the governed R. P. M. of the engine can be normally very much exceeded.

Figure 3 is aview of the device asshown in Figure l taken in the direction of the arrow A and shown partially in section.

Figure 4 is an elevation of the bridge ofthe governor of Figures 1 and 2iwith thediverting vane or half-throttle shown in relaxed position to illustrate its manner of mounting.

Figure 5 is a view taken looking at the left side of Figure 3, illustrating the valve controlling and adjusting means of the governor controlling and adjusting mechanism.

Figure 6 is a View similar to that of Figure l showing a further preferred embodiment of the apparatus ofthe present invention, with the carburetor throttle shown in open position.

Figure '7 is a View similar to that of Figure 6 with the carburetor. throttle shown in partially open position.

Figure 8 is an elevation of the diverting vane or half-throttle employed in the embodiment of the invention shown in Figures 6 and 'I-and illustrating the manner'of operation and mounting thereof. Y

With continued reference -to the drawings, wherein like characters are employed to designate like parts and withparticular reference to Figures 1and2:`

'Referencenumeral Idesignates the apertured flange of the throttle passageway II of a carburetor (not shown). Flange I is designed for attachment to a iiange I2 of an intake manifold I3 of an internal combustion engine (not shown), but isshown-separated therefrom to provide a space for the reception of a fluid ilow governor generally indicated at G.

YGovernor G'has a cylindrical bore I5 therein aligned with carburetor passageway II, bore I being formed within a governor block Il. In section block I'I is similar in shape to flanges I0 and I2 of the carburetor passageway and intake manifold, respectively, and cooperates therewith to form vertical bores I8 for the reception of assembly bolts (not shown) employed to rigidly secure the governor in mounted position. A throttle valve II', preferably of the butterfly type, is mounted in carburetor passageway II upon a suitable shaft so that upon rotation it can be employed to vary the permissible area for fluid flow through carburetor passageway I I. Throttle valve I I is preferably arranged for manual operation by the operator of the engine.

. Governor G comprises generally an adjustable valve mechanism for throttling passageway I5 when the engine upon which the governor is mounted reaches a predetermined .maximum R. P. M, It is essential that this mechanism operate smoothly and with great sensitivity and yet present no substantial obstructionto Vfuel flow at engine speeds below the governed maximum. Itis also essential that it operate to govern the speed of the engine underV all conditions of load and fuel flow and particularly under the so-called throttle-cheat conditions. While these characteristics are present in the governors described in my copending applications, previously identified, the governor of the present invention has been found to be characterized by even greater sensitivity; smoothness and range of operation.

A substantially T-shaped member, comprising a pair of legs I9 interconnected by a relatively straight flat bridge member 2|, is incorporated in the governor block in slots 22 in such manner that bridge 2| extends horizontally across bore I5 with the side surfaces thereof in substantially verticalplanes. Bridge 2| thus offers substantially'no resistance to fluid now. Legs IS likewise have their. surfaces in vertical planes and are so located as to position bridge 2| slightly offset from theaxis of boreIS. y

It will be noted that diametrically opposite sides '23 and 24 of. bore I5 adjacent slots 22 extend upwardly throughout .the length of the bore and are formed as slightly flatsides leading into notches 25 and 26, respectively, which bound a curved uninterrupted smooth surface 21 of bore I5. Associated with bridge 2| is a governing valve comprising a power vane 28 and a stabilizing or balancing vane 29 mounted for unitary oscillation about a horizontal axis that is offset in the same plane as that of bridge 2|. Vanes 28 and 29 have short offset pivoted arms 3| and 32, respectively, which impart tothem a U-shape when viewed edgewise. rArms 3| are spaced for disposition closely adjacent at portions 23 and 24 of bore I5 and arms 32 are spaced to fit vwithin arms 3 I. Y

A pair of screws 33 Vare employed to securely Afasten the two pairs of engaged arms at a desired xed angle relative to'one another upon the enlarged portions 34 of a pair of'rotatable supporting shafts `35 and 36. Shaftsv 35 and 36. are Q.

formed with conicallbeari'ng portions 31 and 38 respectively, which engage bearings 39, in turn held in place by bearing cones 42 and 43 in such manner that bothlateral and axial thrusts are taken by the bearings, and :the pivoted governor valve is free to oscillate during its operation.

Bearing cones 42 and 43 are adjustably secured in tapped apertures 42' and 43 in block I1 and the outer ends of bearing cones 42 and 43 are preferably formed with screw driver slots or like means to provide convenient means of adjustment of play in bearings 39. Set screws 44 are preferably provided in bores 45 to lock the cones in their adjustedv position. It will be noted that by reason of the specific shape of the cones wherein pockets of considerable depth are provided for the surfaces contacting the bearings, dirt, grit and other undesirable matter are prevented from collecting within the cones and if taken in around the threaded cones will immediately pass olf into the fluid rather than retreat to the bearings and-their cones by reason of the relatively low pressure Within the conduit.

Shaft 35 is provided with a portion 46 of reduced cross section which extends through an aperture in bearing cone 42 and has an inertia member 41, pinned, threaded, or otherwise secured thereto for rotation therewith. Preferably a locking member 41 is employed which is suitably secured to the other end of shaft 46.

Inertia member 41 is housed` within a housing 48 secured to and preferably formed integral with block I1 at one side thereof, housing 48 being preferably provided with a cover plate (not shown) to prevent the entrance of dirt or grit to the mechanism contained therein and to protect the mechanism from unauthorized tampering. Inertia member 41 is slotted as shown at and a pin 52 is passed through the opposing walls of the slot thus formed. An eyed and threaded member 52 is mounted on pin 52 and in turn has secured thereto one end of a spring 53 which at its opposite end is secured to a threaded and eyed member 54. Member 54 engages a pin 55 mounted in a slotted portion 56 of an adjustment block 51 mounted to reciprocate in guides 58 and 59, preferably formed integral with housing 48.

Block 51 is formed with a tapped bore 6| in which is threaded an adjusting screw62 having an enlarged head 63 thereon. It will be noted that head 63 is provided on its underside With a serrated formation 64 whereby head 63 is maintained in any desired position by reason of the serrations 64 engaging the adjacent portion of housing 48. Thus block 51 may be positioned at any desired point in guides 58 and 59. A cap 65 is preferably provided for the open portion 66 of housing 48 in which head 63 of screw 62 operates in order that suitable sealing means may be employed and unauthorized adjustment of screw 62 prevented. It is preferable that screw 62 be provided with a head of a special design such as to require the use of a special key or tool in the hands of only authorized persons for adjustment.

On the opposite end of housing 48, a projecting portion 61 is `formed which is tapped to receive a threaded member 88. Threaded member 68 is preferably formed with screw driver slots or the like at the outer end thereof to facilitate adjustment and to enable it to be locked in place by a pin 69 passing through a slot into holes provided in thezadjacent portion of housing 48. Member 68 at its inner end has a threaded projection 1| thereon to secure a resilient member or spring 12. Opposite member 12, a recess 13 is formed in inertia member 41 with abutting or projecting portion 14 thereon to center spring 12 when engaged in recess 13.

In connection with springs 53 and 12, it is preferred to employ special spring fastening means therewith as disclosed in my application S. N 738,114, wherein the threads on the mounting portions are not formed of a pitch equal to the pitch of the coils of the springs employed, but are preferably formed. of a pitch calculated to be greater than that of the coils of the springs when under their greatest degree of tension and fully expanded. By the employment of such an arrangement, it has been found that the possibility of the springs breaking loose is eliminated whereas with conventional threads` as hitherto employed, the spring coils have evidenced a tendency to slip oif the threads at the end of the threaded portion and wear the threads until it is no longer possible to keep the threads secured thereto.

The tension of spring 53 normally urges inertia member 41 to a position such as shown in Figure 5 which corresponds to the Wide open valve position shown in Figures l and 2. In this position, the governing valve is yeldingly held in engagement with a spacing or stop element 8|, preferably integrally secured to bridge 2| and arranged to position vane 29 in a substantially vertical position.

In this position pin 52 is in the end of the slot provided in member 52 and is preferably slightly offset from a horizontal plane through the shaft 46. By reason of this offset, it will be noted that when inertia member 41 rotates in a counter-clockwise direction with reference to Figure 5, in response to closing movement of the governor valve, the resistance to movement of the valve is uniformly increased due to the increasing length of the effective arm between pin 52 and shaft 46 as Well as due to the continued stretching of spring 53. Spring 12 does not engage inertia member 41 until the governor appreaches a closed position and is employed primarily to insure a smooth easy governing action and to prevent fluttering at points approximating closed position. It will be noted that spring 12 is not of the same pitch throughout, but is provided with a portion 82 of relatively ne pitch engaging recess 13 in inertia member 41 and a portion 83 of relatively coarse pitch immediately adjacent thereto and next to the threaded projection 1|.

In adjusting the portion of the governor so far described, spring 12 may be adjusted by threaded member 68 and requires adjustment only for the characteristic of the governor which is determined by tests conducted at the factory at the time of manufacture. Adjustment of spring v12 bears substantially no relation to the particular speed or range of speeds over which the governor is designed to operate, and the adjustment of spring 12 neednot be disturbed after the governor has left the factory. After the governor has been placed in association with the mechanism to be governed, such as the carburetor and manifold of an internal combustion engine, screw 62 may be adjusted to cause block 51 to reciprocate in guides 58 and 59 and so change` the tension of spring 53. By this means, the governor may be accurately setto govern for any desired speed and screw 62 thereafter sealed as an insurance against unauthorized tampering,

The operation of this modification is somewhat the same as that of the modification shown in Figures 1 and 2. In the throttle position shown in Figure '7, the blade 93 acts to direct all fiuid flow to the left of bridge 2l since the portion of the conduit to the right thereof is closed. Thus the resulting force on vane 28 is substantially three times that if vane 93 were not present. This insures operation of the governor at relatively narrow throttle openings and throttle cheat is thus prevented. 'Y

Upon rotation of throttle 89 to an open position, the upper edge of the throttle contacts cam 96 and vane 93 is rotated to a position as shown in Figure 6 wherein there is no diversiony of flow and a substantially unobstructed ilow is permitted to all elements of the governor in accordance with the full throttle opening.

'Ihe use of a cam 96 formed of spring wire is of advantage in that the cam may be readily adjusted to existing installations Where the locations of the throttle valves may be different and particularly when the throttle valve is located a relatively great distance from the lower edge of the governor bridge.

It is apparent from the foregoing description that the present invention provides novel methods and apparatus where insurance of the operation of a governor is provided under all conditions of operation. Moreover, the apparatus is exceedingly inexpensive since it virtually involves only the addition of a half throttle, a spring anda shaft to mount the same on existing governors. Devices heretofore employed, such as relatively expensive piston and cylinder arrangements, which due to dirt, dust or the like are diicult to maintain in proper working order, are eliminated. It is also apparent that the present invention is extremely efcient in overcoming in throttled positions the heretofore difficult problem of throttle cheat. Y

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. 'I'he present embodiment is therefore to be considered in' all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by United States Letters Patent is:

l. In combination with a governing means and a throttle valve for controlling fuel flows through a conduit, means mounted separately from said throttle Valve adjacent said governing means for directing a suiicient portion of said fuel flow to said governing means to render the latter responsive to substantially all rates of uid iiow when said throttle valve is in early opening position, and a spring to maintain said directing means in such directing position independent of changes in pressure of said fluid except when said throttle valve goes to substantially fully open position.

2. In combination with means responsive to the rate of fluid flow in a conduit for governing said fluid flow through said conduit, a throttle valve, and means adjacent said governing means for insuring sufficient fluid flow against said governing means to render the latter responsive at substantially all rates of fluid flow, said uid flow directing means comprising a guide means mounted for oscillation in said conduit on a pivot spaced from said throttle valve and a spring to maintain said guide means in guiding position independent of changes in pressure of fluid except when said throttle means is in relatively wide open position.

3. In combination with means responsive to the rate of fluid ilowin a conduit for governing said iiuid flow through said conduit, a throttle valve, and means adjacent said governing means independent of the pressure within said conduit for insuring sufficient fluid ow against said governing means to render the latter responsive at substantially all ratesr of fluid flow, said uid iiow directing means comprising aguide vane mounted for oscillation in said conduit on a pivot spaced from said throttle valve, said guide vane and throttle valve being arranged so that said throttle vvalve upon moving to arelati'vely wide open position will contact and move said guide vane to an inoperative position.

4. In combination with means responsive to the rate of iiuid flow in a conduit for governing said fluid flow through said conduit, a throttle valve, and means adjacent said governing means for insuring sufficient fluid iiow against said governing means to render the latter responsive at substantially all rates of fluid flow, said fluid flow directing means comprising a guide vane mounted for oscillation in said conduit on a pivot spaced from said throttle valve, and a member on said guide vane positioned in the path of said throttle valve as said throttle valve moves to open position whereby said guide vane is rendered inoperative at predetermined openings of said throttle valve.

5. In combination with a governor responsive to the iiow of iluid through a conduit and comprising a power element, a throttle valve in said conduit, a separately pivoted vane mounted in said conduit normally positioned to concentrate fluid flow upon said power element, and means to connect said throttle valve and said vane whereby the latter is rendered substantially inoperative as said throttle valve is opened.

6. In combination with a governor responsive to the iiow of fluid through a conduit and comprising a power element, a vane pivotally mounted in said conduit adjacentsaid governor and extending in a direction opposite to that of fluid flow,said vane being of a size to obstruct said conduit except the portion thereof leading to said power element, means to normally maintain said Vane in obstructing position to concentrate fluid flow upon said power element, and a butterfly valve in said conduit positioned relative to said vane to render the latter inoperative as an obstruction when said valve is rotated through open position, said vane being arranged to be adjusted for diierent locations of said butteriiy valve.

7. In a throttling valve assembly for governing iiuid flow through a conduit, a pivoted valve assembly mounted for oscillation within said conduit, said valve assembly comprising a power vane and a stabilizing vane on opposite sides of the valve pivot, a partition to separate said Vanes passing through the plane of said pivot, a iiow controlling valve, and a guide vane mounted on an axis removed from said flow controlling valve and on one end of said partition, said vane being arranged to oscillate` in said conduit and insure the direction of uid flow to said power vane at relatively narrow openings of said ow controlling Valve.

8. In the combination defined in claim 7,

wherein means is provided to connect said guide vane to said W controlling valve whereby the vane is moved to a position wherein it offers substantially no obstruction to fluid flow through said conduit when said oW controlling valve is in relatively Wide open position.

9. In combination with a governor responsive to the iiow of fluid through a conduit and comprising a power element, a vane pivotally mounted adjacent said governor and of a size to obstruct the conduit except the portion thereof leading to said power element, a spring to normally maintain said vane in obstructing position to concentrate fluid ow upon said power element independent of changes in pressure in said conduits, and a butterfly valve in said conduit positioned relative to the vane to render said vane inoperative as an obstruction When said valve is rotated to open position.

10. In a control for fluid ow through a conduit, a throttle valve movable from open to closed position, iluid deilecting means mounted separately from said throttle valve, means to normally maintain said deeeting means in deecting position independent of changes in velocity or pressure of uid in said conduit, and means on said deecting means positioned in the path of travel of said throttle valve to be contacted thereby and effect movement of said fluid deecting means during a predetermined range of movement of said throttle valve.

11. In a control for flow of uid through a conduit, a pivoted valve member, a pivoted vane member spaced therefrom and arranged to obstruct a predetermined portion of said conduit, and means on one of said members arranged to contact the remaining member whereby on movement of said valve member to open position, said vane member is removed as an obstruction in said conduit.

12. In a control for ow of fiuid through a conduit, a butterfly valve, a guide vane for fluid pivoted adjacent said butterfly valve, and a pro jection on said vane arranged to engage said buttery valve only in certain positions of the latter whereby said vane is actuated according to predetermined movements of said butterfly valve.

13. In a control for flow of :duid through a conduit, a pivoted valve member, a pivoted vane member spaced therefrom, and means on one of said members arranged to contact the remaining member whereby on predetermined movement of said valve member, said vane member is oscillated about its pivot, said latter means being adjustable to permit its use With valve members and vane members spaced at diierent distances from one another.

WILLIAM E. LEIBING.

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