US1834601A - Compressor controlling mechanism - Google Patents

Description

ec. 1, 1931. L. J. CLAPP COMPRESSOR CONTROLLING MECHANISM Filed March 28, 1950 2 Sheets-Sheet l ln'wmron:

LEW/5 d CLHPP.

Dec. -1, 1931. L. J. CbAPP COMPRESSOR CONTROLLING MECHANISM 2' Sheets-Sheet 2 Filed March 28, 1930 llL/f/ll/ l/YVE/YTOR LEW/5 d. CLHPP.

M A'Wm Patented Dec. 1, 1931 i i I UNITED, STATES PATENT. OFFICE LEWIS J. CLAPP, O]? ULABEMONT, NEW HAMPSHIR ASSIGNOR TO SULLIVAN MAGEIKEBY COMPANY, A CORPORATION OF MZASSAOEUSETTS oon'rrmssoa CONTROLLING mncmrsm Application filed larch as, 1930. Serial No. 4391598.

This invention relates to means for coninvention may assume in practice. In the trolling prime movers and compressors or drawings,- pumping equipment and relates more par- Fig. 1 is a side elevation of a portable comticularly to an improved combination for pressor embodying my improved arrangecontrolling the loading or unloading of a ment. 55 compressor and also controlling the prime Fig. 2 is an enlarged fragmentary side mover which actuates the compressor. elevation of the prime mover and control Various systems and arrangements have elements associated therewith.

heretofore been proposed for effecting co- 3 is an enlarged sectional view of the 1o ordinated control of the prime mover, such controlling mechanism adapted to cooperate w as an internal combustion engine, and a com- Wi h the-throttle valve of the prime mover pressor driven thereby, but such systems and nd to be actuated by the pressure fluid in arrangements have certain objections either the receiver. in being complicated or lacking stability in g- 1 an nl rged fragmen ary section 15 eifecting control, or in being relatively eXpenof the right end of the prime mover speed sive to manufacture and maintain, other g v rnordifiio ltie l b i t, as i d Fig. 5 is an enlarged sectional view of the st od to th kill i th t, valve mechanism of the controlling mecha- An object of my invention is to provide an mSIn shown 1n Fig. 3.- 2o improved arrangement for effecting coordig- 6 1S enlarged gm n y SectlOIl nated control between the prime mover and 0f the ng ne throttle valve and operating the compressor. A further object is to provide an improved arrangement for controliwhlle I h ve hown the lllustrative emling th Speed f th prime mover d f bodiment of the invent on n connection with 25 eflecting loading or unloading of the compo able compressor, 1t yvlll of coursebeunr A th bj t i t id an i derstood that the invention is applicable to proved simplified arrangement for controly p une m v rmpressor arrangement ling the speed of an internal combustion enlrrespcctlve 0f he manner in which it may gine and for controlling the loading and/or he'supported. In any case, there is a prime so unloading of the compressor. A further mover, generally mdlcated at he pre so and more specific object of the invention is ably of the internal combustion engine to provide an improved arrangement and yp Compressor swtably connected means h b th Speed f th prime move! for drive to the crank shaft of the engine,

may b t ll d i d d tl f th 7 and of the reciprocating piston and cylinder 5 loading mechanism when the compressor is yp y g 1151131 Inlet and exhaust V v in its loaded condition. Another specific meChan1mS- r r bly he inlet Valve object of the invehtion is to provide an immechamsm? are Provlded y proved arrangement and means which will be form of 9P unloadm mechalllsm,

relatively simple yet will have a high degree generally Indicated at a n E Pl' to of stability of control and may be easily ig iggi iz z igg ffig z gg g ifi i 1 vs e.

mammmed m operatlon and W111 be lelatlve' Fluid from the receiver is conducted through ly inexpensive .to manufacture. Other oba R 5 to any usual type of pilot Va1vemech anism 6, and then to a pipe 7 leading to one jects and advantages of my improved inven- 45 non W111 be readlly understood by those end of a control mechanism, generally indi- Skilled in the art and l be l y cated at 8. This mechanism is adapted to delstood from P follolf'lng descl'lptlon and control the engine throttle valve 9 in a manthe accompanying drawlngs. nerwhich is well'understood in the art, its In these draw ngs I have shown for purspecific form being disclosed in the Holds- 5o poses of illustratlon one embodiment that my worth Patents 1,692,267 and 1,785,956. In 109 v the movable valve tion is accomplished, $fl0W equalized on each side of the crating link 21 view -of these disclosures, a -.deta'iled :description of the valve mechanism will not begiven, I

a U-shaped pipe 14130 a valve mechanism,

generally indicated at '15, thereby to force 16 open and permit pressure fluid to fiow through a pipe 17 to the unloading mechanisms 3 and thereby unload the compressor. When the unloading functhrough pipe 17 cease thus permitting pressure to be valve '16 whereclose this valve will upon a spring 18 will then to cause the stem inder for piston 10. en receiver pres sure drops to a predetermined minimum and the pilot valve vents the ipe 7, a spring 20 will move piston 10 to the right and abut against and move the stem 19 and valve 16 to open position, thereby likewise venting the pipe 17 and unloading mechanisms 3 through the pipes 14 and 7, thus causing the compressor to be reloaded. From this it will be clear that the devices 3 to effect unloading will not occur until thenose 12 has ceased to hold the lever 13 in the position to which it moved it when airacted on piston 10.

As shown in Fig. i2,the nose12ofthe controlling mechanism merely abuts against the throttle valve lever of the prime mover and is in substantially 'pposed relation to an opwhich is pivotally connected at one end to the throttle lever 13and'at its other end to a speed governor operating lever 22 which is its full open position in Fig. is speed governor, for operating lever 22, is of a usual and well-known type, driven preferably, and as herein shown, directly by the usual timing gears for the engine valve mechanism, which timing gears are contained within the usual gear case 24. The governor is of the centrifugally actuated type having a stem 25 movable to the right (Fig. 4) upon an increase in speed and in the opposite direction upon a decrease in speed, there being at lever 26 herein held in abutting engagement wise secured. While with the rod. 25 as by an adjustable sp'riiig pressed rod 27. The lever 26 is pinned to the pivotal shaft 28 to which the lever 22 is likea compression spring 29 is shown it'will of course be understood that any spring arrangement may be employed which will hold the lever 26 in en gagement with the speed responslve pin 25.

From the foregoing description of the compressor prime mover controlling mechanism 8 and the description of -the sp ee d responsive governor mechanism 23 it will be .19 to project into the cylyet thespeedgovernorandcontrolling mechventing of the air that acts in device sopera'te directreadily: seen that :both y upon the single throttle valve which conjtrols the supply Of fuel from :a .usual carburetor to the en ineicylindersandthuscon- :trols the speed ci the engine in theusual and well-known manner, and, due :to the spring arrangement for holding the levers 26 and 22, the .fluid actuated :control mechanism 8 is adapted to move-theithrot'tle "valve automatircally :1n accordance with the receiver pressure so'as-to unload the'co'mpressor and conatI'Ol the speed -:of the engine without in any way encountering .any opposing force from the speed responsive element of the speed governor such as may becreated :by thecentrifugal force therein. It is :also seen as previously pointed out that the .speed gov- .ernor may close the throttle valve independently of the controlling mechanism 8 and anismszare adapted to be maintained simultaneously in cooperating relation with the single throttle valve during normal operation.

It is-thus seen that my arrangement is relatively simpleboth in structure and o eration, requlring relatively 'few parts an only a single engine throttle valve, and While the various controls are shown as applied to a throttle valve of an internal combustion engine, it will of course be understood that this throttle valve comprises broadly a power medium control for a prime mover which may be of any usual form for driving pumping mechanisms such as compressors.

While there is in this application specifically described one form which the invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of theappended claims.

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

1. The combination with a compressor and a prime mover for driving the same, of means for controlling the prime mover including a power medium control element therefor, means for controlling said element in accordance with the speed of the prime mover, and means governed by the compressor discharge pressure for controlling said element directly to slow down said prime mover when the compre's'sor'discharge pressure exceeds a predetermined desired maximum, each of'said means having operative connection with the element whereby their respective operating forces are applied to the element substantially in a common plane.

2. The combination with a prime mover operated compressor, of a-power medium control element forsaid prime mover, a pivoted member for actuating 'said element, means operatively connected to said member for controlling said element in accordance with the prime mover speed, and means also separately operatively connected, to said member for controlling said element in accordance with the compressor discharge pressure, the operative connection of each of said means with said pivoted member being on the same side of its pivot.

3. The combination in a prime mover operated compressor -comprising a power medium control element, means for controlling said element in accordance with the speed of said prime mover includin a yieldably held member normally moved in accordance with the prime mover speed, said member being operatively connected to said power control element, and means for also controlling said element in accordance with an operating condition of said compressor and adapted upon operation to cause directly yielding of said speed responsive member. 4. The combination of a prime mover operated compressor, com rism a ower medium control element or said prime mover, means for controlling said power element in accordance with the speed of the prime mover, and means for also controlling said power element in accordance with an operating condition of said compressor, each of said means having an operatlve connection with said power element operative directly to reduce the flow of power medium to the prime mover.

5. The combination set forth in claim 4: further characterized in that operative connection between the power medium control element and speed responsive means is positively connected to the power medium control element.

6. The combination-set forth in claim 4 further characterized in that the operative connection between the power medium control element and speed responsive means has provision for moving the power medlum control element in opposite directions.

7. The combination in a compressor driven an internal combustion engine having a pivoted throttle valve and an operating lever therefor, comprising means for controlhn said valve in accordance with the speed 9 said engine, and means for controlling said valve by fluid pressure, each of said means having an operative connection with said valve lever and at least one of said connections being adapted to eifect movement of the lever in opposite directions.

8. The combination with a compressor driven by an internal combustion engine having a pivoted power medium control valve and an operating lever, of means for controlling said valve in accordance with the speed of said engine, and means for controlling said valve by fluid pressure, each of said means having an operative connection with said valve lever e same side of the pivot thereof and :vhen effective moving it in the same direcion.

Q. In combination, a compressor having fluid pressure operated unloading mechanism, an internal combustion engine for driving said compressor, a receiver into which the compressor discharges, means including a pilot valve for controlling the loading or unloadm of said compressor in accordance with t 0 receiver pressure, means for controlllng the speed of said prime mover in accordance wit operation with themeans for controlling the loading of the com ressor, said speed control including a ylelda 1e connection adapted at least an er certain conditions of operation to yield under the influence of the compressor controlling mechanism.

l0. In combination a compressor having fluid pressure operated unloadmg mechanism, an internal combustion engine for driving .said compressor, a receiver into which the compressor discharges, means including a pilot valve for controlling the loading or unloading of said compressor in accordance with the receiver pressure, a throttle valve for controlling the flow of power medium to said engine, means whereby said com ressor load controlling means is operative y connected to said valve for effecting closure thereof at a time when the compressor is unloaded, and s ed responsive means for also controlling sai valve in accordance with the s eedof said prime mover including a yielda le connection between the throttle valve and speed responsive means.

In testimony whereof I afiix my signature.

LEWIS J. CLAPP.

the speed thereof and in 00-

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