US1130659A - Governor mechanism. - Google Patents

Description

N. BALDWIN.

GOVERNOR MEGHANISM.

APPLIGATION FILED JULY 29, 1910,

Lgyg., v Patented Mar. 2, 1915.

JMW M W1 ff W jg /3 5 j j' J Z j N i fff JIL ffii Z///z j.: u? j Attorneys N. BALDWIN.

GOVERNOR MBGHANISM. APPLIGTION FILED JULY 29, 1910.

Lw@ Patented Mar. 2, w15.

2 SHEETS-SHEET 2.

f Witnesses 'in ventor NATHANIEL BALDWIN, OF MIDWAY, UTAH.

GOVERNOR. MECHANISM.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed July-29, 1910. Serial Np. 574,519.

T0 all whom it may concern.'

Be it known that I, NATHANIEL BALDw1N,a citizen of the United States, residing at Mid'- way, in the county of -lVasatch and State of Utah, have invented a new and useful Governor Mechanism, of which the following is a specification.l

It s the object of the present invention to provide an improved governor mechanism designed particularly to use in connection with and for the purpose of controlling the speed machinery Where great uniformity of speed is required and where there are liable to be sudden changes of load.

rlhe primary aim of the invention is to provide, in governor mechanisms, means responsive not only to variation in speed of the prime mover,- but responsive .also to conditions of acceleration. ernor mechanisms designed for. the purpose of merely correcting variations in speed are ineffective when under conditions of acceleration so that where load is partially removed and the prime mover, being relieved of such load, is allowed to suddenly race the ordinary speed governing mechanism employed will, it is true, act to cut off to a greater or less degree the supply of power" to the prime mover, but in a very gradual nfanner so that the speed of motion of the prime mover under conditions of load, that is the application and removal of load, is by no means rendered constant by the employment of ordinary speed governing mechanisms.

It is the aim of the present invention, therefore,to provide, in a governing mechanism .for machinery, means responsive to variations in speed as well as means responsive to conditions of accelaration, the latter means being. operableinstantly upon the production of a condition of acceleration or retardation. Thus, whether a major portion of the load be instantly removed or a major portion instantly applied, the governing device of the .present invention is designed to act instantly upon such removal or application -to so regulate the supply of power to the prime mover as to bring its speed of Inotion to normal and maintain it at this point.

lt is `further aim of theinvention to provide fdrfcausing the speed of movement df the prime mover to vary withthe load in any desired manner. For example, this means may be arranged to increase thespeed with Ordinarily, govthe load or to decrease the speed with increase of load.

A further aim of the invention is to provide manually operable means for regulating the supply of power to the prime mover through the governor mechanism and without affecting .the utility of the mechanism and without interrupting its operation.

With the above and other objects in view, the invention consists in the general construction and arrangement of parts substantially as shown in the accompanying drawings, in which,

Figure l' is a vertical sectional view through a governor mechanism constructed in accordance with the present invention. Fig. 2 is a similar view illustrating a slight modification of the invention. Fig. 3 is a View similar to Fig. 2 illustrating a still further modification. Fig. 4 is a detail view in elevation of a slight modication 'of that portion of the mechanism which is responsive, to conditions of acceleration. Fig. 5 is a detailed sectional 'view taken on the line -a' of.Fig. 1, viewing downwardly.

Before proceeding to a specific descriptionv 4may be rearranged or varied in its construction in a. number of ways without departing from the principles of the invention and in fact the showing of the drawings is semidiagrammatic and is intended only to illustrate the principles involved and not to indica-te any specific construction orv arrangement of the mechanism as a whole or of the parts thereof. For this reason, the drawings illustrate all of the several pressure chambers of the mechanism as formed integral although in practice in all probability it will be expedient to separate these chambers and connect them by pipe.

In the drawings, the numeral 5 indicates a support which is here illustrated. asin the form of a bracket arm mounted upon one of the casings or chambers of the mechanism audthis arm carries at its outer end an upstanding sleeve indicated by the numeral 6, the sleeve being preferably separate from the arm and secured at its lower end thereto. A valve rod indicated by the numeral 7 is loosely mounted through this sleeve. More specifically, the rod is so mounted in the sleeve that it may have not only up and down movement therein but may also. rotate to a greater or less degree for a purpose to be presently explained. Rotatably fitted upon the sleeve 6 is a sleeve shaft 8' and a similar shaft indicated by the numeral 9, fitted also upon 'the sleeve 6 at the upper end thereof and it is designed to have not only rotative movement upon the sleeve but also to be vertically movable thereon. This shaft 9 supports the upper head of a gov-- erno, which head is indicated by the numeral 10 and the lower yhead of the governor, indicated by the numeral 11 is secured at the lower endof the sleeve shaft 8.' The' usual bowed spring 12 carrying the centrifugal balls 13 connects the heads 10 and 11 n the same manner as the ordinary speed overnor of this'type andthe upper head 10 as such connection with the upper end of the valve rod as to move this rod up or down depending upon the character of speed variation to which the speed governor is subjected. A pulley indicated by the numeral 14 is secured also upon the lower end of the sleeve shaft 8 and is grooved and has trained about it a rope belt 15 which also passes about a pulley 16 upan the shaft 17 of a prime mover which is here illustrated as in the nature of a tangential water wheel 18. At this point it will be rea'dily understood that the prime mover may bev of somev other ltype if desired and that illustration inthe present instance of a prime mover in the nature of a tangential water wheel is purely arbitrary and is to be so considered.

f The valve stem 7, at its lower end, carries a valve which is indicated by the numeral 19, this valve being reduced to form a vby path groove and a similar groove 21. The formation of these grooves 20 and 21 results in an annular shoulder l22 betweeny the two grooves. This valve 19 works in a casing 23 which is cylindrical and is located between a cylinder 24 and a receiving chamber 25, there being a port 26 opening through the wall of the valve casing into the cylinder 24 and a port 27 opening also through the said casing into the chamber 25. Ahigh pressure chamber 28 is located beneath the cylinder 24 and a port 29 establishes communication between this chamber and the valve casing. There is embodied, in the mechanism, also, a low pressure chamber indicated by the numeral 30 and a pressure supply chamber 31 preferably located beneath the receiving chamber 25. By way of a port 32, lcommunication is established between that end of the cylinder 24 opposite 'the end into which the port 26 opens, and the low pressure chamber 30 and there is an opening 33 in the wall between the high and low pressure chambers which openingis normally closed by a valve 34 and held closed by a spring 35 upon its stem, the tension ofk this spring lbeing adjustable through the ply chamber andthe high pressure chamber by way of anopening 37 normally closed by a valve 38, and a valve 39 normally closes an opening 40 which establishes communication between the receiving chamber and the pressure supply chamber.

The numeral 41 indicates a water supply pipe which leads into the pressure supply chamber and is formed with a'discharge opening 42 with which is associated a valve 43. The stem of this valve is indicated by the numeral 44 and carries also a valve 45 which latter valve coperates with a drain opening 46 in the bottom of the pressure supply chamber. A pipe 47 leads from the low pressure chamber to the receiving chamber and at its point of juncture with the low pressure chamber it has arranged within it a valve 48 normally held closed by a spring 49 which, as in the case of the spring 35, may

have its tension adjusted by a nut 50 upon the stemof the valve 48 whereby to adapt the valve to be opened under degrees of pressure v above a predetermined degree. The stem for the valves 43 and 45 is secured at its lower end below the drain opening 46 to one end of an arm indicated by the nu, mei-al 51 which arm extends up beside the pressure supply chamber and receivin chamber and supports at its upper end, trough the medium of a stem 52, a oat 53 located within the receiving chamber.

The valve 48 above referred to is so arranged that when it opens under pressure, the fluid under pressure, whether it be Oil, water, or air in the low pressure chamber, is permitted to flow through the pipe 47 'and into the receiving chamber and in a like manner, the valve 34 is so arranged that when it opens under pressure, the oil or water under pressure in the high pressure chamber will be allowed to flow into the lowV pressure chamber. Furthermore, the tension of the spring 35 on the valve 34 is so adjusted that more than one half the pressure of the high pressure chamber will be required to open this valve and inasmuch as the pressure in the high pressure chamber is twice that in the low pressure chamber, the valve will be normally closed althoughupon lowering of the pressure in the low pressure chamber to a predetermined ldegree, the valvewill open so as to restore the ratio of pressure between the two chambers. Furthermore, for a purpose to be presently explained, the valves 43 and 45 are so relatively arranged that when the floatn 53 is in lowered position, the valve 45 willfbe closed and the valve 43 will be opened although when the float rises, the valve 43A will move to closed position and the valve 45 will move to open position.

As a means for preventing sticking of the valve 19, an arm 54 is secured upon the valve rod 7 and projects outwardly therefrom beneath the arm 5 and a rocker55 is mounted to oscillate within the arm 5 and has its lower end upturned and projecting as at 56 through an eye at the outer end of the arm 54. A spring 57 is secured at one end of the arm 5 and is wound about the rocker 55 and is secured at its other end thereto and vthis spring normally holds the upper end of the rocker, which is turned laterally as at 58, in engagement with the periphery of the head 11 of the governor. This head is slightly eccentric so that as the governor rotates, slight oscillatory or vibratory movement will be imparted to the rocker 55 and through the beam of the said rocker to the valve rod 7 for the purpose stated. An abutment 59 is secured upon the valve rod 7 below the arm 54 and a lever 60 has one end projecting between the arm 54 and said abutment 59, this lever arm being mounted as at 61 upon the cylinder v24, for rocking movement.

A lever arm indicated by the numeral 62 is fulcrumed as at 63 upon the cylinder 24 and connected to that end of this arm which corresponds to the end of the lever projectingbetween the abutment upon the valve rod, is the lower end of a stem 64, this stem having tted upon it'a spring 65 and a nut 66 which'may be turned for the purpose of adjusting the tension of the spring. The

vstem 64, as stated, is pivoted to the lever arm 62 and extends up through the lever 60 with the spring 65 confined between the nut 66 and the said lever. Thus, a downward pressure is exerted upon that portion of the lever 60 to the left of its ulcrum in Fig. 1 of the drawings. As a consequence, the opposite end of the lever or more speciically that end which projects between the arm 54 and the abutment 59, is held normally elevated and as a consequence the valve rod and valve are held normally elevated.

The numeral 67 indicates a water nozzle through which water is supplied to the tangential water wheel 18 constituting the prime mover With which the governor mechanism is associated and arranged in juxtaposition to this nozzle is a rock shaft indicated by the numeral 68 this shaft having fixed upon it a defleetor 69 which is preferably in the nature of an inverted U- shaped metal hood. An arm 70 is fixed also upon the shaft 68 and to the upper end of this arm is connected a rod 71 having pivotal connection with a cross head 72 mounted in suitable slides 73 upon the top of the l'ow pressure chamber of the device or upon some other suitable supporting member. A piston 74 is arranged within the cylinder 24 and a piston rod 75 is carried by the piston and connects with the cross head 72. Also, for a purpose to be presently explained, a portion of the lever arm 62, indicated by the numeral 76 projects above and rests upon the cross head7 2.

The governor mechanismlwhich is responsive to the condition ofacceleration and retardation embodies a sleeve 77 which is mounted upon the sleeve shaft 8 and may have limited rotative movement thereon' and independently thereof under conditions to be presently explained and ixed upon this sleeve 77 is an inertia Wheel 78 between the spokes of which extend the bowed springs 12 of that portion of the governor which is responsive to variations of speed. The upper end of theV sleeve 77 is increased in diameter as at 79 and is formed with a plurality of inclined slots 80 and pins 81 project from the sleeve shaft 9 into these slots 80. It Will be readily understood that the projection of the pins 81 into the slots 80 serves to connect the sleeve 77 for rotation with the sleeve shaft 8 under normal conditions but the independent rotative movement of the sleeve 77 independently of the sleeve shaft, above mentioned, takes place after conditions of acceleration or retardationas will presently be made apparent.

It will be observed that the low pressure cylinder 30 contains a predetermined quantity of oil under pressure as does also the high pressure cylinder although the pressure in the high pressure cylinder is, as heretofore stated, approximately twice that in the low pressure cylinder, in degree. Also, the pressure supply chamber is filled with waterA to about the level indicated by the heavy dotted lines and above this level with oil and the receiving chamber 25 also contains a greater or less quantity of oil. Also, the pressure upon the oil in the low pressure chamber 30 causes the oil in this chamber to fill the cylinder 24 to that side of the piston 74 at which the low pressure cylinder is located and in a like manner the oil under pressure in the high pressure cylinder 28 lls the cylinder 24 to the other side of the said piston 74.

The operation of the mechanism is as follows: The valve 19 is normally in predetermined position, for example the intermediate position illustrated in Big. 1 of the drawings. If now the speed of rotation of the prime mover 18 gradually increases, the centrifugal force imparted to the centrifugal balls 13 will result in the governor head 10 being lowered and a corresponding movement being imparted to the valve rod 7 and valve 19 supported thereby. As this valve lowers, the oil in the cylinder 24 supplied from the high pressure chamber 28 is allowed to flow. due to its release from pressure, by Way of the by path groove 21 in the valve 19, and port 27 in the valve casing, into the receiving chamber 25. The pressure upon this side of the piston being thus removed, to a greater or less degree, the pressure in the lowpressure chamber 30 vis then of sufficient degree, to force the piston toward the right in Fig. l1. rl'his movement of the piston will slide thecross head 72 in a like direction and will result in the shaft 68 being so run as to swing the deflector 69 in an upward direction and toward thesupply nozzle 67. This movement of the deflector will serve to partially cut of or defleet the stream issuing from the nozzle and impinging against the blade of the Wheel 18. Thus less power will be supplied to the wheel and its speed will gradually lower. As the speed of the prime mover lowers, the governor head 10 will gradually rise-and move the valve 19 toward normal position and this movement of the valve, provided the valve is elevated above the position shown in Fig. 1 0I' the drawings, will cut oifl the iow of oil from the cylinder 24 to the receiving chamber and will allow oil under pressure to flow from the high pressure cylinder by way of the by path groove 21 and into the right hand end of the cylinder 24. This inrush of oil under pressureinto the said end of the cylinder will of course force the piston24 toward the left in Fig. 1 and thus swing the deflector 69 in a -downward direction and allowing a greater portion of the stream of `'water issuingV from the nozzle 67 to impinge against the blades or buckets of the wheel 18.V This will of course also take place if the speed of the prime mover increases. At this point it will be stated that as the level of the oil in the receiving chamber 25 rises, the float 53 will alsov rise and this movement of the float will close the valve 43 and open the valve lithereby cutting ofl' the supplyv of water under pressure through the pipe 41 and allowinga quantity of the waterin the pressure supply chamber to drain 0E through the opening 46. As the water leavesthe pressure supply chamber, the valve 39 will open thus allowing a 'sufficient quantity of oil to flow from the receiving chamber into the pressure slipply chamber. While the above described operation takes place under conditions of variations in speed, marked acceleration or retardation caused by a sudden removal of load or the sudden application of load will not be rectified as quickly as is necessary in machines of such type and it is under such conditions of 'acceleration or retardation that the inertia wheel and the sleeve by which it is carried serve to bring about an instantaneous. variation in the power supply and consequently a practically instantaneous change in speed from abnormal to normal. f

Supposing the governor as an entirety normal speed, and supposing sudden load to.

be applied to the machine driven by the prime mover, the speed of rotation of the Isleeves 8 and 9 will be suddenly slackened and the inertia wheel 78 will then cause or tend to cause a more rapid rotation of the sleeve 77 than that of the sleeve shaft 8.; As a consequence, the sleeve 77 will rotate about the sleeve shaft Sto a greater or less degree ina forward direction or in other words in the direction of rotation of the said shaft 8. As this takes place, the right hand edges of the slots in said Fig. 1 of the drawings will ride beneath the respective pins 81 and the sleeve shaft 9 together with the governor head 10 carried thereby will be elevated to a greater or less degree, suddenly. This sudden elevation of the head 10 will result in a greater quantity of oil being admitted to the right hand end of the cylinder in Fig. 1 and in a sudden movement of the piston 74 toward the left in the said Fig. 1 thereby allowing a greater portion of thepower stream from the nozzle to impinge against the blades or buckets of the wheel. 18. The degree of movement of the valve 119 under these conditions is of course proportionate to the degree of retardation which in turn is proportionate to the increase in load. When the prime mover has received the proper amount of power to balance the additional load, the valve 19 will return to' normal or intermediate position excepty for the action of the centrifugal device which will hold the valve slightly `raised until the speed is backto normal.

If by any means, too much power is supplied to the wheel 18, suddenly, to balance the load, there w-ill be a condition of acceleration immediately established and the valve 19 will be lowered to decrease the supply of power even before vthe speed is normal. Hence, bythe time the speed reaches a normal degree, the supply of power will have been adjusted to balance the load. When load is removed from the prime mover 18, the instantaneous increase in speed'of rotation of the sleeve shafts 8 and 9 will result in the pins 81 riding against the left hand edges of the slots in Fig. 1 of the drawings. As a result, a downward pull will be exerted uponthe sleeve shaft 9 and its head 10. This movement of the head 10 will result in a lowering of the valve rod 7 vand a cutting off of the supply of power in proportion to the acceleration caused by the removal of the load, the degree of acceleration being proportional to the-load re v moved. It will be readily understood that the lowering of the valve'19 is against the tension of the spring and consequently,-

by' adjusting the nut 66, the tension of the spring 65 may be so varied as to provide for menate rotation of the prime mover 18 at any de sired normal speed. It will further be understood that by grasping the left hand end of the lever 60 this lever may be manually rocked so as to raise or lower the valve 19 and thereby increase or decrease the speed of rotation of the prime mover or cut off entirely the supply of power to the same.

lt will be observed that the portion 76 of the lever arm 62, heretofore referred to, when resting upon the cross head 72, eX- tends at an acute angle with respect to the horizontal plane in which the top of the said cross head moves and, as a consequence,

76 of the lever arm is straight, this increase in power supply will be uniform. It will be readily understood however thatwhere it is desired that the power supply shall be increased more or less rapidly beyond a certain speed and beyond a certain load imposed, the portion 76 of the lever arm is to be curved and where the increase in power supply is `to be more rapid'beyond a certain point, the said portion of the lever arm, in addition to being curved as above stated, has its convex edge resting upon the cross head 72 and when it is desired, on the other hand, to increase the supply of power less rapidly, the concaved edge of the said portion of the lever arm rests upon the cross head 72.

Inasmuch as the .pressure in the high a5 pressure chamber will force the oil in the chamber into the low pressure chamber 30 to restore the pressure therein to normal pressure when it becomes lowered, the pressure in the high pressure chamber will at such time lower and as thev pressure in the supply chamber i-s the same as the normal pressure in the high pressure chamber, the valve 38, at such time, will open and oil will flow from the pressure supply chamber into the high pressure chamber. It will be understood that the head of water entering by way of the pipe 41 mto the pressure supply chamber is under vthe same pressure as the oil in the high pressure chamber to produce this result. In other words, when'the receiving chamber 25 is empty, the weight of the loat 53 will keep the valve 45 closed and the valve 43 opened. This will allow water under preset sure to enter the pressure supply chamber as the cross head 72 is 'moved by the pistonl and this pressure will close the valve 45 and closes the valve 39 and opens the valve 38 and force oil through the opening 37 into the high pressure chamber 28 until the pressure in this chamber balances the water pressure. In the meantime, the low pressure chamber 30 will receive its proportion of oil under pressure and a certain amount of this oil will flow by Way of the pipe 47 into the receiving chamber 25 whereupon the ioat in this chamber will rise and the valve 43 will be closed and the valvev 45 opened. As the vwater drains from the chamber 31 through the opening 46, the valve 39 will open and admit oil from the chamber 25 into the chamber 31 to take the place of the water drained therefrom. When a .suiicient amountA of oil has been discharged from the receiving chamber, the ioat will again lowery and this operation will be repeated.

It will be obvious that various modifications may vbe made in the construction and arrangement of the parts of the mechanism shown in Fig. 1 and one of the modifications is shown in Fig. 2 of the drawings. ln this ligure, the pressure supply chamber and also the receiving chamber are omitted and the pipe 47 leads directly from the low pressure chamber to a suitable Waste. y Without giving an extended explanation of the o' eration of this modified structure it will be readily understood that inasmuch` as the water supply pipe 41 is-connected directly to the high pressure chamber and the pipe 47, as stated, leads from the low pressure chamber to a waste, the .operation is in all essential points the same as givenin connection with Fig. 1 of the drawings. In the arrangement shown in Fig. 3 of the drawings, the construction is substantially the same as Fig. 2 except that the water pressure is supplied from an elevated tank 85 to the high pressure cylinder and from a tank at a lower elevation .to the low pressure cylinder, this latter tank being indicated by the numeral 86. It will be understood of course that in botharrangements shown in Figs. 2 and 3, the governor proper is the vsame as shown in Fiof. 1.

Instead of employing the inertia wheel 78 and its sleeve 77, the valve rod 7 may be eX- tended above the head 10 and` may carry idler pulleys 87 and 88 as shown in Fig. 4 of the drawings and an inertia Wheel mounted upon a counter-shaft 89 and indicated bythe numeral 970- may be driven from the prime mover 91 through the medium of a belt 92 trained over the pulleys 87 and 88. Under conditions of acceleration, the stress would be laced principally upon the lower stretch ci) the belt 92 thereupon downward pressure would be brought to bear against the pulley 88 thereby lowering the valve rod and the valve carried thereby whereas on the other hand, a condition of retardation would result in the valve rod being elevated. It will be readily understood that in place of employing oil, water -may be fully as well employe and that various other modifications of this character may be made without in anyway departing from the principles of the invention.

What is claimed is 1. A' governorcomprising a piston arranged for the control of power supplying means for a prime-mover, a valve, a valverod carrying said valve, means operatively connected with said rod for controlling the same and responsive to conditions of speed, inertia controlling means associated with the second mentioned means and responsive -to conditions of acceleration, including a lever having operative connection with said valve-rod, a lever-arm, and tension-controlling means between said lever and said lever-arm, said lever-arm being adapted to be oscillated upon the movement of said piston.

2. A governor comprising a piston arranged for the control of power supplying meansfor a prime-mover, a valve, a valverodcarrying saidvalve, means operatively connected with said rod for controlling the samefand responsive to conditions of speed, and inertia-controlling means associated with the second mentioned means and responsive to conditions of acceleration and retardation, Aincluding a lever having operative connection with said valve-rod, a lever-arm,l and tension-controlling means between said lever and said lever-arm, said lever-arm being adapted to be oscillated upon the movement of said piston.

3. A governor comprising a piston arranged for the control of power-supplying means for a prime-mover, a valve, a rod carrying said valve, means having operative connection with the valve-rod and responsive to conditions of speed for raising and lowering said valve-rod, and inertia-controlling means associated with the second mentioned means and movable independently thereof and responsive to conditions of acceleration, said inertia controlling means being arranged to actuate said valve-rod through the medium ofthe means responsive to conditions of speed, including a lever having operative connection with said valverod, a lever-arm, and tension-controlling means between said lever and said leverarm, said lever-arm being adapted to be os- 'cillated upon the movement of said piston.

Il. A governor comprising a piston arranged for the control of power supplying means for a prime-mover, a valve, a valverod, means having operative connection with the valve-rod and responsive to conditions of speed for raising and lowering said valve-rod, and -inertia-controlling means associated with the second mentioned means and movable independently thereof and responsive topconditions of acceleration and retardation including a lever having operative connection with said valve-rod, a leverarm, and tension-controlling means between connected with the valve rod, a lever having operative connection with said valve-rod, a lever-arm, tension-controlling means between said lev'er and said lever-arm, and means for controlling the supply of the motive .agent for -a prime-mover, said lever? arm being adapted to be oscillated by the .action of said last-referred to means.

6. In a governor, a valve rod, sleeve shaftsl mounted to rotate upon the valve rod, governor heads carriedby the sleeve shafts, means connecting thel heads for relative movement and responsive to conditions of speed, one of said heads being connected with thevalve rod, and inertia controlling means responsive to conditions of acceleration, and retardation, a lever having operative connection with said valve-rod, a leverarm, tension-controlling means between said lever and lever-arm, and means for controlling the supply of the motive agent for a prime-mover, said lever-arm being adapted to be oscillated by the action of said lastreferred to means.

7. In a governor, a valve rod, sleeve shafts mounted to rotate about the valve rod, a governor head carried by each `sleeve shaft, means connecting the governor heads and responsive to conditions of speed for relatively moving vsaid governor heads, one of said heads being connected with the valve rod, a sleeve fitted upon the other' governor head, and independently rotatable thereon, the last mentioned sleeve being formed with inclined slides, pins carried by that sleeve shaft which supports the governor head which is connectedto the valve rod, said pins projecting into the slots in the said sleeve, and an inertia controlling wheel fixed upon the said sleeve, a lever having operative connection with said valve-rod, a leverarm, tension-controlling means between said lever and said lever-arm, and means for controlling the supply of the motive agent for a prime-mover, said lever-arm being adapted to be oscillated by the action of said lastreferred to means.

8. In a governor, a valve rod, a governor means responsive to conditions of speed and including a rotatable head, said head being eccentric with respect to the valve rod, an osciliatory member having a portion bearing against the head, and an arm upon the valve rod having operative connection With the oscillatory member.

9. In a device of the .character described, a governor means responsive to conditions of speed, including a .rotatable head, said head being eccentric With respect to the valve-rod, an oscillating member having a portion Ibearing kz igainst-said hea'd and an arm upon said valve-rod having operative connection with said oscillating member, a lever having operative connection With said valve-rod, a lever-arm, tension-controlling means between -said lever and said lever-arm, and means for controlling the supply of the motive agent for a prime-mover, said leverarm being adapted to be oscillated by the action of said last-referred to mea-ns.

10. In a governor, a valve rod, governor means operatively connected to the valve rod, 'a manually operable lever having operative connection with the valve rod, a piston, a

cylinder in which said piston Works, means i:or supplying pressure to said cylinder, a valve carried by the yalve rod and controlling the supply of pressure to the cylinder, and tension means operatively connected with the manually operable lever and arranged to have its tension varied by the movement of said piston.

11. In a governor, a cylinder, a piston Wrking insaid cylinder and arranged for the control of power supplying means for the prime mover, means for supplying luid under pressure to said cylinder,a valve, a valve rod, means connected with the valve rod responsive to conditions of speed for controlling the movement of lsaid rod, a lever having operative connection with the valve rod, a lever arm, said lever arm being adapted to be oscillated upon movement of the piston, and tension means connecting the lever arm and the said lever, differential pressure-chambers, said'valve being adapted to control the different pressures therein and inertia-controlling means responsive to conditions of acceleration. Y

12. In a governor, a cylinder, a piston Working in said cylinder and arranged for the control of power supplying means for the prime movermeans for supplying fluid under pressure to said cylinder, a valve, a valve rod, means connected with the valve rod responsive to conditions of speed for controlling the movement of said rod, a lever having operative connection with the valve rod, a lever arm, said lever a'rm being adapted to be oscillated upon movement of the piston, and adjustable tension means connecting the lever arm and the said lever, differential pressure-chambers, said valve being adapted to control the different pressures therein and inertiacontrolling means responsive to conditions of acceleration.

13. In a governor, a cylinder, a piston Working in said cylinder and arranged for the control of poiver supplying means for the prime mover, means for supplying fluid under pressure to the cylinder, a valve, ay

valve rod, means connectedwith the valve rod and responsive to conditions of speed for controlling the movement of said rod, a cross head to which the piston is connected, a lever having operative connection With the valve rod, a lever arm mounted for oscillatory movement and having a portion resting upon the cross head and so arranged that movement of the'piston Will oscillate said lever arm, and connection between the lever arm and .the lever, diferential pressure-chambers, said valve being adapted to control the different pressures therein and inertia-controlling means responsive to conditions of acceleration.

y 14. In a governor, a cylinder, a piston Working in said cylinder and arranged for the control of'povver supplying means for the prime mover, means for supplying fluid under pressure to the cylinder, avalve, a valve rod, means connected with' the valve rod and responsive to conditions of speed for vcontrolling the movement of said rod, a

cross head to which the piston is connected, a lever having operative' connection with the valve rod, a lever arm mounted for oscillatory movement andhaving a portion resting upon the cross headl and so arranged that movementof the piston Will oscillate said lever arm, and tension means connecting the lever arm and lever, differential pressure-chambers, said valve being adapted to control the different pressures therein and inertia-controlling means responsive to conditions of acceleration.

. 15. In a governor, a cylinder, a pistonv Working in said cylinder and arranged'for the prime mover, means for supplying fluid under pressure to the cylinder, a valve, a valve rod, means connected Withthe valve rod and responsive to conditions of speed for controlling the movement of said rod, a cross head to which the piston is connected, a lever having operative connection with the valve rod, a lever arm mounted for oscillatory movement and having a portion resting upon the cross head and so arranged that movement of the piston Will oscillate said lever arm, and adjustable tension means connecting the lever arm and lever, differential pressure-chambers, said valve being adapted to control the different pressures lever arm.

therein and inertiacontrolling means responsive to conditions of acceleration.

16. In a governor, a valve-rod, means operatively connected to the rod for control ling the same and responsive tol speed-conditions, and inertia controlling means including a rotatable head, said head being eccentric ywith respect to the valve-rod, an oscillating member having a portion bearing against said head, and an arm upon said valve-rod having operative connection with said oscillating member.

17. In a governor, a cylinder, a piston working in said cylinder and arranged for the control of power supplying'means for a prime mover, means for supplying fluid under pressure to one end of said cylinder, means for supplying fluid under a greater pressure to other end of said cylinder, .a valve controlling the supply of fluid to the last mentioned end of the cylinder, a valve rod, a lever. operatively connected with the valve rod, a cross-head connected to the piston-rod, a lever-arm having an acute-angled disposed portion controlled by the action of said cross-head, .a resilient orv tension connection between said lever and said lever arm.

18. In a governor, a cylinder, a piston working in said cylinder and arranged for the control of power supply for a prime mover, means for supplying iuid under pressure to one end of said cylinder, means for supplying fluid under a greater pressure to the other end of said cylinder, a valve controlling the fsupply of fluid to the last mentioned cylinder, a valve rod, means connected with the valve rod for controlling the movement of the same and responsive to speed conditions, `.a lever having operative connection with the'valverod, an oscillatory lever arm, a cross head to which the piston is connected, said lever arm coperating with said cross head and adapted to be oscillated through the movement of said cross head, and connection between said lever and said 19. In a governor, a cylinder, a piston working in saidcylinder and arranged for the control of power supply for a primo mover, means for suppl ing fluid under pres- `sure to one end of sai cylinder, means for supplyingiluid under a greater pressure to the other end of said cylinder, a valve controlling the supply of luidto the last mentioned cylinder, a valve rod, means connected with the valve rod for controlling the movement of the same and responsive to speed conditions, a lever having operative connection with the valve rod, an oscillatory lever arm, a cross head to which the piston is connected, said lever arm cooperating with said cross head and adapted to be oscillated through the movement of said cross head, and a resilient connection between said lever and said lever-arm, the pressure of which is delivered to said lever and which pressure is controlled by said lever-arm, through thevaction of said cross-head and said piston.

20. In a governor, acylinder, a piston workingin said cylinder and `arranged for thecontrol of power supplying means for a prime mover, a luid pressure chamber in communication with the cylinder at one end thereof, a fluid pressure chamber in communication with the cylinder at the other end thereof, a valve controlling the way of communication between the last mentioned chamber and the last mentioned end of the cylinder, a valve rod, means responsive to speed conditions and connected to the valve rod for controlling the' movement of the same, a pressure supply chamber, means for admitting fluid under pressure to said chamber, an exhaust from said `chamber, said chamber being in communication with the last mentioned fluid pressure chamber, a receiving chamber in communication with the first mentioned fluid pressure chamber, a float inthe receiving chamber, and a valve controllingthe supply of iuid under pressure to the pressure supply chamber and controlling the exhaust from said chamber, said valve having operative connection with said float- In ltestimony thatI claim the foregoing as my own, I have, hereto alixed by signature in the presence of two witnesses.

NATHANIEL BALDWIN.

IVM. BRoADBEx'r.

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