US1095174A - Water-wheel regulator. - Google Patents

Description

Patented Apr. 28, 191i 7 SHEETk-SHEBT 1.

A. DICKERSON.

WATER WHEEL REGULATOR.

APPLICATION FILED MAB..15, 1912.

Hill I 1 ATTORNEYS A. DICKERSON.

WATER WHEEL REGULATOR.

APPLICATION FILED MAR; 15, 1912.

Patented Apr. 28, 191% 3 SHEETS-SHEET 2.

WITNESSES MTORIIEYS A. DIGKERSON.

WATER WHEEL REGULATOR.

APPLICATION FILED 111111.15, 1912..

Patented Apr. 28, 1914.

ATIORNEYS NITED STATES PATENT oF IoE,

ARTHUR DIGKEBSON, or Amman ronx, UTAH, AssIGNon 'ro memos mm- MATIC GOVERNOR COMPANY, UTAH.

or SALT LAKE 011w,- u'm'n, A conromrrxon or WATER-WHEEL REGULATOR.

sp i n a n Patented Apr. 28, 1914.

Application filed ma. 15, 1912. Serial No. 683,934.

To all 117mm. it may concern Be it known that I, An'rnun Drcr'muson, a citizen of the United States, and a resident of American Fork, in the county of Utah, State of Utah, have invented a new and useful Improvement in Water-WVheel Regulators, of which the following is a specification.

My invention is an improvement in water wheel regulators, and has for its object the provision of a powerful and convenient device of the character specified for nicely regulating the speed of a prime mover in accordance with the load, wherein the gate operating mechanism is operated by a rotating piston automatically controlled by valve mechanism, which admits the liquid to the' opposite-sides of the piston to partially open or partially close the gate in accordance with the load and wherein the valve mechanism is directly controlled by a centrifugal regulator driven by the prime mover.

A further object is toprovide mechanism for reversing the action of the centrifugal regulator on the valve mechanism in case the resistance or load on the prime mover is suddenly removed, in orderto prevent racing and to cause the regulator to act before the speed of the prime mover exceeds its normal point.

A further object is to provide adjusting means in connect-ion with the device to permit the regulator to move fast or slow to suit the conditions under which the prime mover is operating.

In the drawings: Figure 1 is a side view of the improvement; Fig. 2 is an end view; Fig. 3 is a transverse vertical section; Fig.- 4 is a partial side View, looking at the opposite side from Fig. 1; Fig. 5 is an enlarged transverse horizontal section of the plunger; Fig. 6 is an enlarged plan view of a portion of the regulator; and Fig. 7 is a section on the line 7.7 of Fig. 3.

In the present embodiment of the invention an oil pump 1 is arranged in the casing 2, which serves as a base or pedestal for the mechanism, and the shaft 3 of the pump is extended out of the casing at both ends, one end being provided with a pulley 4 for connection with the prime mover by means of a belt'not shown. The shaft is journaled in bearings 5 in the side walls of the casing, and the pump 1 is provided with an intake pipe 6 extending to near the bottom of the ;through pipe 7 may pass freely ports 31-31 casing. The pump forces the oil into a pipe 7 extending outwardly through one of the side walls of the casing and thence upwardly and laterally to a connection with one end of the valve casing or chamber 8. The valve chamber 8 rests upon a seat 9 on the upper side of a cylinder or drum 10, having laterally extending flanges 11 at its lower side, which rest upon the cover 12 of the casing 2 and are secured to the cover by bolts 13. The cover is secured to the casing by bolts 14 and is provided with a rib 15 seating inside the casing, as shown in Fig.

3. A pipe 16 leads fi'om the other end of the valve chamber 8 and opens into the easmg- 2 at the opposite side from pipe 7. When the pump is operated under normal conditions oil is forced from the casing 2 through pipe 7 and valve chamber 8 and is returned to the casing by pipe 16.

The chamber 8 communicates with cylinder or drum 10 by means of two ports 17 and 18, which open in the drum or cylinder on opposite sides of a radial abutment 19 provided with two by-passes 20 and 20 (Fig. 7). The upper edge of the abutment 1s seated in a oove or notch 21 in the cylinder wall, an a packing strip 22 is seated in a recess 23 in the lower edge'of the abutment, the strip engaging the hub 24 of a piston 25. The piston 25 is movable in the cylinder, and the shaft 26. to whichthe hub 24 is secured extends through the cylinder 10 at both ends. The said shaft operates the gate moving mea'ps to open orclose the gate in accordance 'with the direction of movement of the piston. The free or outer edge of the'piston is recessed at 25 to receive a packing strip 22. The strips 22 and 22 are normally pressed outward by any suitable means.

A. valve stem 26 extends longitudinally through the chamber, passing through heads 27 at each end, and a sleeve 28 is secured on the stem in the chamber, the said sleeve carrying four valve disks 29 and 29 and 30 and 30 (Fig. 5). Under normal conditions the stem 26 stands in the position of Fig. 5, so that oil entering the chamber through and 3232, controlled by valves 2 929 and 3030 to pipe 16 and return to the casing- 2. 7

One end of stem 26 passes through one arm 33- of an elbowlever 33-34, pivoted at 35 to a bracket arm 36. ,7 Collars 37 are secured to the stem on opposite sides of the arm 33, so that when the arm is moved the stem moves therewith. A weight 38 is slidable on arm 34, which is approximately horizontal, and the weight may be secured in adjusted position on the arm by a setscrew 39. The bracket arm 36 extends laterally from the top of the valve chest, and a hollow stub shaft 40 is journaled vertically .the inner end of the bracket arm. A n ley 41 is secured to the stub shaft, and a disk 42 is secured to said shaft above the pulley. A pair of arms 43 extend in oppo site directions from the disk and each arm I has a pair of spaced lugs 44 at its outer end. An elbow lever comprising arms 45 and 46 is pivoted between each pair of lugs 44. Each elbow lever is provided with oppositely extending journal pins 47 (Fig. 6) at the junction of the arms 45 and 46 for engaging the lugs, and the arms 45 of the levers extend inwardly and engage a rod 48 below a stop 49 on the rod. On each of said arms 46 is carried a weight 50 and the upper face of each weight is formed as a plane which is normally parallel with a portion of a cross-head 51 that rests thereon when the prime mover is at normal speed.

Said cross-head is carried on said rod 48.

a short distance below a stop 53 and when said cross-head is given the extreme upward lift by the tilting of said weights as hereinafter described, said cross-head will engage said., stop 53 and thereby raise said rod 48. The said cross-head has a slot 52 in each end portion thereof through which the upper portion of said arms extend and in which they are free to move.

The arms 46 are free to move radially with respect to the rod 48 within the limits prescribed by the slots 52, and the said weights are normally drawn together by means of springs 54 and 55 (Fig. 6). Each weight is provided at one side with a pin 56 extending laterally outward, and at the other with a perforated lug 57. The gate of prime mover can be adjusted by handwheel 84 while governor is running, by turning the cut out valve 111-112. This valve is located beneath valve chamber 8 and between ports 17 and 18. A one-fourth turn of said valve will form an opening connecting ports 17 and 18, thus allowing oil to be transferred from one side to the other of piston 25 and allowing a free path for the oil from pump to return to exhaust chamber (see Fig. 3) and thence to the tank. .Thus the governor can be instantly cut in or out of service while running; Handwheel 84 is keyed to shaft 82 journaled in bearings 83 and 83, and a pinion 81 is keyed to opposite end from wheel 84 on shaft 82 and meshes in gear 80 on shaft 26 (see Fig. 1), thus connecting hand-wheel 84 with gate mechanism of prime mover 'lhe function of weight 38 is for (through its slidable connection to lever 34) an adjustment of speed while governor is in motion. The purpose of thumb screw 39 is to secure weight 38 to lever 34. Each spring 54 and 55 has a hook or ring 58 at each end, one for engaging pin 56 and the other for engaging an eye 59 in a stem 60 threaded through the lug 57. A thumb nut 61 engages the stem on the opposite side of the lug from the spring, and by means of the said nut the tension of the springs may be re ulated. The rod 48 passes through the ho low shaft 40 and through an opening in the arm 34 of elbow lever 33-34, and the said rod is headed below the arm, as shown at 62,. The pulley 41 is driven from the prime mover by means of a belt (not shown). a

When the prime mover exceeds a predetermined speed, the weights 50 are moved outwardly and by means of the rod 48, and elbow lever 33-34, the stem 26 and the valves connected therewith are shifted to the right or to the left. When the valves are shifted to the right, valves 29 and 30 close ports 31 and 32, and the admission of oil is shut off from port 18 and from the chamber 8, and is forced to pass through port 17 to the drum or cylinder.

As the oil is forced into the cylinder in through port 17, as before mentioned. the piston 25 is formed to move away from port 17 and around the cylinder toward port 10 18, and the movement of the piston operates the gate closing mechanism (not shown) to shut off a portion of the power and thus reduce the speed of the prime mover. When the prime mover falls below the prede--1 5 termined speed and the valve stem 26 moves in the opposite direction, as previously set forth, valves 29 and 30 close ports 31 and 32, thus shutting off the oil from port 17 and chamber 8, so that the admission of oil is forced through port 18 into the cylinder, driving the piston 25 in the opposite direction and opening the gate wider to increase the power and the speed of the prime mover.

From the above description it will be apparent, that should the prime mover he suddenly relieved of its load and start to race or run away the outward tilting of the arms 46 carrying the weights 50 will cause the arms 45 to engage the stop 49, and raise the rod 48, and move the connections therewith of the gate closing mechanism; this will partially close the gate and slow down the prime mover. Should something happen to the regulator, as for instance the belt to 'fly off the pulley 41., 01, other mechanical parts break or give way, or a short circuit occur in the line of an electric power plant, the springs 54 and 55 will draw the said weight O portion of said arms 46 -'raise the. cross-head and the rod 4.8 and gate mechanism.

thereby move the elbow lever 33-3 and shift the valves 29 and 30 closing the ports 31 and 32, opening the piston 25 and shaft 26, and thereby operate the gate mechanismand cut off the power of the prime mover. I thus supply by the cross-head and the means to move it, an absolute automatic safety control for. the

The by- passes 20 and 20 are similar in construction, but are oppositely arranged (Fig. 7). Each by-pass is normally closed by a valve 63' engaging a seat 64 on one face of the abutment, and each valve has a stem 65 passing through a bearing 66 held in the by-pass. A nut 67 is threaded onto the outer end of each stem, and a spring-68 encircles each stem between the nut and the bearing, and normally holds the valve to its seat.

The object of the by- passes 20 and 20 is to relieve undue pressure on either side of the abutment from any reason. The bypasses furnish a positiverelicf for such. over pressure,-the valves yielding to permit the oil to flow to the opposite side of the abutment, and when the pressure is relievedthe springs return the valves to closed position. A pinion 69 is keyed to one end of shaft 26 which is reduced to receive the pinion (Fig. 2) and the pinion meshes with the teeth of a rack bar 70 connected to a cylinder-71 and extending longitudinally thereof. A plunger or piston 72 is arranged in the cylinder on a stem 7 3, stufling boxes 74* at each end of the cylinder 71. The cylinder is provided with a bypass 74?, connecting the ends thereof on each side of the plunger, and a hand valve 75 is interposed in the bypass. A flush cup 76 ofglass or the like is also connected with one end of the by-pass. By means of the valve the capacity of theby-pass may be regulated, and thus also the rapidity of action of the dash pot comprising the cylinder and the plunger.

A roller 77 is journaled on a pin 78 above the cylinder 71 and holds the rack bar 70 of the cylinder firmly in contact with the pinion 69. The dash pot effects the action of the piston 25, and by varying the capacity of the lay-pass 7 4 the action of the piston 25 may be regulated to suit varying conditions. The roller 77 eng ges a trackway 79 on the upper side of the cylinder 71. r

The plunger 72 operates the valve stem 26 through mechanism to be presently de pot moves the stem 26.

scribed. The dash port 17 and move the tion demanded by the change in load.

'nism between rod 73 of stem.26' of the valvecomprises a rock shaft side of the drum from lever collar and the lug.

which extends through which the shaft 26 -A plurality of pins *being arranged in adapted to engage and swing a. lever 86.

in opposition to the movement imparted to it by theelbow lever 3334. If, however, the change of s eed becomes more violent, the retarding e der will overcome the resistance of springs interposed in the above mentioned mechanism, and permit the regulator to set the valves 29-29 30-30 in the requisiteposition to drive the piston in the p1'op er direc Y The'above mentioned the dash pot and 95 journaled in bearings 96 onthe opposite 86 (Figs. 1 and 2). A pair of disks or collars 97 is secured tothe shaft in spaced relation by set-screws 98, one collar being arranged adjacent to eachjbearing. vided with a bearing 100 for shaft, and the other end has a 101 through which the adj a 26 extends. Y

A collar 102 is secured to the stem on the outer side of the lug by a set-screw 103, and a spring 104 encircles the stem between the A similar spring 105 encircles the stembetween the lug and the adjacent collar of the pair 37. Springs 106 are arranged on rock shaft 95 and engage the arm 99, normally holding the armin IIGIItIiIlPOSltlOIl. A second arm 107 is secured to the end of the rock shaft adjacent to the dash pot, and the upper end of the arm is forked at 108. The arms of the fork engaging the perforated lug nt end of stem engage a sleeve 109, which is secured on the adjacent end of the rod. It will be evident that when the piston 25 is operated in either direction by the oil entering through port 17 or 18, the cylinder 71 will be moved in the same direction as the piston.

The plunger 72 will be carried with the cylinder, since the oil cannot flow through the by-pass with sufficient rapidity to prevent such movement, and shaft '95 will be rocked by arm 107 and will rock arm 99 and move the stem 26 and connected valves in the opposite direction to the movementimparted to the said valves by the regulator. Should, however, the change in load be violent, the springs 104, 105 and 106 will yield to permit the regulator to hold the valves in the position demanded by the" changein load. The opposite end of shaft 26 from the pinion 6 is provided with a gear wheel 80, which meshes with a pinion 81 on one end of a shaft 82 journaled in bearings 83 on the base casing 2. A hand wheel 84 is secured to the ect of the oil in the cylin'..

V connecting mecha- Y An arm- 99 has one end proopposite -end of the shaft-82, by means of i may be manually rotated to open orclose the gate when so desired.

85 are arranged on the inner face of gear spaced relation-and being wheel 80, the said pins The lever 86 is arc-shaped, as shown in Fig. 2, and is arranged at one side of the drum 10 and is pivoted on a pin 87 to drum 10 intermediate the ends of the lever. The lower end of the lever has an opening 88,

and a spring89 has one end engaged with A pair of collars 91 are secured in spaced relation on the stem 26 by set-screws 92, or the like, and a cam 93 is provided at the upper end of the lever for engagln between the collars. The arrangement 0 the cam and collar is such that when the lever 18 swung transversely of the stem, the stem will be movedlongitudinally, the d rect on of movement depending upon the dlrection of movement of the lever. The lever 1s provided with a lateral arm 94, extend ng toward the gear wheel from the bearing 95 of the arm which engages the pivot. pm 87 before mentioned. The free end of the arm 94 is in position for engagement by the plus 85, and when the arm is so engaged .the lever will be swung to move the stem, and the spring 89 will return the'lever to original position.

, When the piston 25 is moved by an 111- crease of pressure on either side of the abutment, the shaft 26* will be oscillated in the same direction. and will operate the gate through connections not shown. The gear wheel 80 can only swing a certain distance, however, before one of the pins 85 w1ll strike and swing arm 94, whlch will swing lever 86. The lever will operate stem 26 to.

restore the valve to original position, that is, to reverse the movement imparted to the valves by the regulator, and to. reverse also the direction of flow of the oil and the movement of piston 25. The spring 89 will re turn-the lever to neutral position and will normally hold it in such position.

The operation of the regulator as a whole is as follows: The valves 2929 30-30 normally occupy the central neutral position shown in Figs. 1 and 5, so that the oil may flow freely from pipe 7 to pipe 16. The pump 5 is operated by the prime mover to continuously draw in oil from casing 2 through the intake 6 and force it through pipe 7, valve chamber 8, and pipe 16 to the casing. Should there be a change in load on the prime mover, either an increase or a decrease, or a change in speed for any reason, the centrifugal regulator will move the stem longitudinally to close either valves 2930 or valves 29 30, the former when the speedof the-prime mover exceeds a predetermined number of revolutions per minute, and the latter whenthe prime mover falls below this speed. When valves 293 are operated to close ports 3132, the oil can no longer pass to pipe 16 from pipe 7, nor can it pass to port 18, but must flow through port 17 to the drum 10 to the left of the abutment 19 in Fig. 3. The piston 25. is forced awa from port 17' toward port 18 around with s aft 26, and the shaft actuates the gate closing mechanism to shut oflf a portion of the power. The rotation of shaft 26 moves the dash pot to the left of Fig. 2, and through the connection of stem 26 with the dash pot the valves 2930 are restored to original position. The dash pot may be regulated by means of valve 75. to obtain the exact movement needed on the part of rod 73. If the change of speed or load is of suilicient moment, the springs 104, 105 and 106 yield to permit the centrifugal regulator to hold the valves in closed position. The gear wheel 80 is also oscillated, and if the movement of the wheel is of sufiicient extent to cause a pin 85 to engage arm at of lever 86, the valves will be operated by the said lever 86 to return the stem 26 and the valves to neutral position. A decrease of speed will close valves 29 and 30 to cause the oil to flow into the drum through port 18, and the operation will be the same, but in the opposite direction.

The cross head 51 before mentioned is designed to move the rod 48 in case of overload or excessive low speed. When the weights 50 are moved inwardly by the springs beyond a certain point the upper faces of the weights will lift the cross head, thus lifting the rod 48 and shifting the valves to out 01f the power of the prime mover.

Any preferred means may be used to connect shaft 26 with the gate operating means, and all of the springs 104, 105 and 106 and 106, as also springs 54, and 68, are adjust-able, the first three by means of the collars, the springs 55 by means of the mechanism shown in Fig. 6, and the last by means of the nut 67. e regulator may be thus regulated to suit any required conditions as to speed and load.

I claim:

1. A water wheel regulator, comprising a drum, a shaft journaled axially thereof and connected with the controlling mechanism of the gate for opening and closing the same return to the pump, said valves being normally in neutral position to permit the free its movement by the stem connected to the trolling the by-pass, a yielding connection between the plunger and the valve stem for moving said stem in the opposite direction to its movement by the regulator, and means operated by the rotation of the shaft beyond a predetermined point in either direction for moving the stem in the opposite direction to regulator, said means being yieldingly connected to the stem, and

-oppositely arranged safety valves in the abutment.

2. A water wheel regulator, comprising a drum, a shaft journaled axially thereof and controlling the by-pass,

- the gate for connected with the controlling mechanism of the gate for opening and closing the same when the shaft is rotated, said drum having a radial abutment above the shaft and an inlet port on each side of the abutment, a radial piston on the shaft, a valve chamber seated over the ports and having a communication with each port, apump driven by the prime mover and connected with opposite sides of the chamber and normally circulating oil therethrough, valves in the chamber for connecting the supply from the pump with either port of the drum and for simultaneously disconnecting the supply from the return to the pump, said valves being normally in neutral position to permit the free circulation of the oil through the chamber, a stem connected to thevvalves and extending beyond the chamber at each end, a centrifugal regulator operated by the prime mover, a connection between the regulator and the stem for moving the valves when the prime mover exceeds or falls below a predetermined speed, a dash pot connected with the shaft and operated thereby, said dash pot comprising a cylinder for holding oil mounted to be moved longitudinally by the rotation of the shaft, a plunger in the cylinder, a by-pass around the plunger, a valve a yielding connection between the plunger and the valve stem for moving said stem in the opposite direction to its movement by the regulator, and

oppositely arranged safety valves in the abutment.

3. A water wheel regulator, comprising a drum, a shaft journaled axially thereof and connected with the controlling mechanism of chamber, extending beyond the chamber when the shaft is rotated,-said drum having the shaft and an I a radial. abutment above ginlet' port oneach side of the abutment, a radial piston on the shaft, a. valve chamber seated over the ports and having a communication with each port, 1 the prime mover and connected with opposite sides of the chamber and normally circulating oil therethro-ugh, chamber for connecting the supply from the pump with either port of the drum and for simultaneously disconnecting the supply from the return to the pump, said'valves being normally in neutral position to permit.

the free circulation of the oil through the a stem connected to the valves and at each end, a centrifugal regulator operated by the prime mover, a connection between the regulator and the stem for moving the valves when the prime mover exceeds or falls below a predetermined speed, a dash potconnected 'With the shaft 5 dash pot comprising a cylinder for holding j oil mounted to 1 the rotationcof'the cylinder, 'a by-pass around the plunger, a. Y valve controlling the by-pass, and a yieldand operated thereby, said be moved longitudinally by shaft, a plunger in the ing connection between the plunger and the valve stem for moving sald stem 1n the opposite direction to its movement by the regulator;

drum, a'shaft journaled axially thereof and connected with the controlling mechanism of the gate for opening and closing the same when the shaft is rotated,said drum having a radial abutment above the shaft and an inlet port on each side -of the abutment, a

seated over the ports and having a communication with each port, a pump driven-by site sides of the chamber and normally circulating oil therethrough, valves in the chamber for connecting the supply from the pump with either port of the drum and for simultaneously disconnecting the supply from the return to the pump, said valves being normally in neutral position to permit the free circulation of the oil through the chamber, a stem connected to the valves and extending beyond the chamber at each end, a centrifugal regulator operated by the prime mover, a connection between the regulator and the stem for moving the valves when the prime mover exceeds or falls below a predetermined speed, and a dash pot operated by the movement of the shaft in either direction for moving the valves in the opposite direction to their movement by the regulator, said dash pot being yieldingly connected to the stem, and valves in the abutment.

opening and closing thesame 5. A water wheel regulator, comprising a valves in the eL'A water wheel regulator, comprising a radial piston on theshaft, a valve chamber a pump driven by a the prime mover and connected with oppoopposltely arranged safety drum, a shaft journaled axially thereof and connected with the controlling mechanism of the gate for opening and closing the same when the shaft is rotated, said drum having a radial abutment above'the shaft and an I inlet port on each side of the abutment, a radialpiston on the shaft, a valve chamber from the return to the pump, said valves being normally in neutral position to permit the free circulation of the oil through the chamber, a stem connected to the valves and extending beyond the chamber at each end, a centrifugal regulator operated by the prime mover, a connection between the regulator and the stem for moving the valves when the prime mover-exceeds or falls below a predetermined speed, and a dash pot yieldingly connected to the said stem and operated by the movement of the shaft in either direction for moving the valves in the opposite direc tion to their movement by the regulator.

6. In a governor of the character specified, a drum having a radial abutment and inlet ports on each side of the abutment, a piston mounted to rotate in the drum, and connected with the controlling mechanism of the gate, a valve chamber inclosing the ports, a pump operated by the prime mover and connected tothe opposite ends of the chamber.

and adapted to circulate oil through the chamber, valves inthe chamber, said valves being arranged to deflect the oil into either port of the drum and standing normally in neutral position to permit a free circulation of the oil, means for moving the valves to deflect the oil into either port of said drum, valves in said abutment to release some of said oil and thereby to stop the motion of said piston, a dash pot for damping the movement of said piston, and a yieldin connection between said dash pot and said first mentioned valves for moving them to a neutral position.

7. In a governor of the character speci fied, a drum having .a radial abutment and an inlet port on each side of the abutment, a

piston mounted to rotate in the drum and connected with the controlling mechanism 'of the gate, a valve chamber inclosing the ports, a pump operated by the prime mover and connected to opposite sides of the chamber and adapted to circulate oil through the chamber, valves in the'chamber for deflecting the oil into either port of the drum, said valves being normally in neutral position to permit a free circulation of the oil, means operated by a departure of the prime mover from a predetermined speed for moving the valve to deflect the oil into one or the other of the said ports whereby to operate the piston, a dash-pot connected with the piston for damping the movement of the same, said dash-pot having a by-pass, a valve controlling the by-pass, and a yielding connection between the damping means and the valves for returning said valves to neutral position.

8. In a governor of the character specified, a drum having a radial'abutment and an inlet port on each side of the abutment, a piston mounted to rotate in the drum and connected with the controlling mechanism of the gate, a valve chamber inclosing the ports, a pump operated by the prime mover and connected to opposite sides of the chamber and adapted to circulate oil through the chamber, valves in the chamber for deflecting the oil into either port of the drum, said valves being normally in neutral position to permit a free circulation of the oil, means operated by a departure of the prime mover from a predetermined speed for moving the valves to deflect the oil into one'or the other of the said ports whereby to operate the piston, a dash-pot connected with the piston for damping the movement of the same, said dash-pot having a by-pass, a valve controlling the by-pass, a yielding connection between the damping means and the valves for returning said valves to neutral position, means operated by the movement of the piston beyond a predetermined point in either direction for returning the valves to neutral position, and a yielding connection between the said means and the valves.

ARTHUR DIOKERSON. Witnesses JAMES CHIPMAN, J12, A. CHIIMAN.

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