US1458297A - Regulating device - Google Patents

Description

Jam@ i12, i923. v Lg? D. s. JACOBUS REGULATING DEVI C E Original Filed Dec. 14, 1916 5 Sheets-Sheet l ".A v I y' L., i i l I INVENToR.

LM/ M W 4FM ATTORNEYS.

.Emme l2, 11923. 11,45%,297

D. 5. JACOBUS REGULATI NG DEVI CE Original Fild Dec. 14 1916 5 Sheets-Shale?, 2

' INVENToR. VWJQWM BY ,f2/maf www A TTORNEYS.

June 12, l923- 31,458,297

D. s. JAcoBUs REGULATING DEVICE Orlgpal File'd Dec. 14, 1916 5 Sheets-Sheet 5 IN VEN TOR.

ATTORNEYS.

june l2, i923.

` D. JACOBUS REGULATING DEVICE Original Filed Dec. 14, 1916 5 Sheets--Sheei'I 4 A WK IN V EN TOR.

ATTO/RNEYS.

lune l2, l923.

disc 8. When water is used as .the liquid in the coiled pipe 2 the chamber 6 is filled with water upon the surface of which oil is placed to prevent corrosion of the diaphragm 7, which is preferably of hardened steel. For a given steam temperature passing over the coil 2 there will be a given vapor pressure transmitted to the chamber 6, since the coil 2, chamber 4, pipe 5, cylinder 6 and diaphragm 7 constitute a closed evaporator, of which one part, the coil 2, is subjected to the heat of the steam in the main '1. This pressure acting upon the under side of the diaphragm 7 is transmitted through the following mechanism The post which bears on the disc 8 is ivoted to a lever 9 having its fulcrum at 10.v

o the free end of the lever 9 is attached the stem of a valve 11 which valve controls the flow of a fluid under pressure, preferably water, enterin through pipe 12 from a source of supply. @rom the valve chamber the Huid under pressure is delivered through a pipe 13 to a cylinder 14 having a piston 15, which latter is connected to a power lever 16 having its fulcrum at 16. To the end of lever 16 is attached a rod 17, the movements of which rod are utilized to operate suitable doors to admit air ,to the superheater and thus control the temperature thereof as more fully described in my prior application above referred to. When the valve 11 is closed, by a reduction of the vapor pressure on diaphragm 7, the power lever 16 is restored to its normal position by a counterweight 162, the water in the cylinder being discharged through a valved pipe 18. The valve in the pipe 18 is partially open at all times, so that there is a permanent outlet to the c linder during its operation and the valve 1s not changed in position when the mechanism is in operation. The valve in the pipe 18 is so ad- 'usted that during the time the water is eing admitted to the cylinder 14, through the pipe 13, the discharge through the pipe 18 is materially less than the rate at which the water is admitted through pipe 13. The upward movement of lever 9 is opposed by a spring 9 and is limited b a stop 92.

The action of the regu ator above described is to cause the vapor pressure generated in coil 2 to act through the regulator in such manner that when the temperature of the superheated steam flowing through the main 1 exceeds that for which the apparatus is set, the lever 9 will be raised to thereby open valve 11 to admit water under ressure to the working side of piston 15. Vhen the piston 15 is moved, the power lever 16 will be moved and thereby the rod 17 to operate a mechanism which regulates the temperature of the superheated steam as more fully disclosed in my prior patent above referred to. When the temperature of the steam is reduced below that at which the apparatus is set, the valve 11 will be moved to its seat by the spring 9.

On closing the valve 11 the water discharged through the valve in the pi e 18 will allow the power piston 15 to slowly regain its original position near the top of the power cylinder 14, the lever 16 having a oounterweight 162 which moves the power piston 15 to its original position.

The advantage of allowing the water which operates the power piston 15 to escape at all times through a constricted opening is that it provides a simple means whereby thepower piston 15 may return to its original position after the mechanism has been thrown into action, and further, there are special advantages in using this method as the apparatus may be operated through a very small movement of the-valve 11. The method ldescribed is superior in these respects to one where the water is released from the power cylinder by means of a valve actuated by the same mechanism that actuates the valve 11,/as the latter arrangement would require a much closer adjustment and would be much more liable to get out of order than the one described.

The pressure gauge 43, shown in Fig. 2, is acted on by the ressure transmitted from the coil 2 through the tube 5. This gauge has been found of great assistance in the operation of the superheater, as it is highly sensitive in indicating changes in temperature in the superheated steam, as changes in the pressure of the vaporin coil 2 depend upon changes in the temperature of the su erheated steam.

he apparatus above described is set to operate at a temperature somewhat higher than the average amount of superheat glven by the superheater and should the superheat, either accidentally or by design, attain the temperature to which the device is set, the latter will act to prevent a further increase of superheat. In the actual use of the device it has been found that by proper hand manipulation of the fires it is seldom called upon to act, but its use is, nevertheless, highly essential as it provides a safeguard against an excessive amount of superheat which might cause trouble in the power system.

In Figs. 2, 3 and 4, I have shown, more in detail than in Figure l, the mechanism for operating the power lever 16, this mechanism embodying certain features of construction differing from that shown in the diagrammatic Fig. 1. Water has been used as the evaporating agent in coil 2, in the ractical use of the device, herein described? After the apparatus has been installed, water is pumped into the coil 2 through a valved pipe 58 having a removable plug in its end, as shown. This filling takes place with lli retener steam dowing through the main l and when the water has been heated, it is blown out through the on endA ot pipe 58 and the apparatus then relled. By repeatin this operation several timesall the air is riven out of the'apparatus and when it is nally filled, the surplus water is allowed to drip slwly from the pipe 58 until the pressure indicated by the gauge d3 corresponds to the temperature of the coil 2. 'lhis point can be readily determined as the pressure talle quickly on lirst allowing the water to drip from pipe 58, whereas the, moment the pressure correspondingto the temperature of the coil 2 is reached, there is no further fall 1n pressure. When the apparatus is set up and in operation the discharge outlet ot the valve at the end of the pipe 58 is closed by the plug. The diaphragm.` chamber 59 must be filled with oil, or with water and oil, before the coil 2 is lled.

The chamber 59, as shown, is formed with a projection 59 to limit the downward movement of the diaphragm 60. Resting upon the diaphragm is a strut or post 6l which bears against a knife edge 62 carried b lever 63. The tension ot spring 9 may be a justed by a nut 98 to hold the lever 63 tirmly against the stop 94, and to provide the requisite resistance to the upward movement ot the strut 61. To the end oit the lever 63 is attached the spindle 6a ot a valve 6d shown on an enlarged scale in Fig. 3. Said valve is formed so that it will take its position firmly on the seat 64:2. Both the seat 642 and the valve bonnet 64% maybe readily taken out and replaced. When the valve is opened by the pressure generated in coil 2, acting through diaphra 60, strut 61 and lever 63, water under pressure will be admitted through supply pipe 12 to cylinder 1t, thereby moving iston l5, connected ower lever 16 and ro 17 to edect the opening of doors as described in my prior application. As shown in Fig. 4l, a spring 65 is interposed between the end el 'lever 63 and a supporting ieee carried by the valve spindle 64. Y'Ww valve 6d is closed, the lever 63 and spring 65 are in the positions shown in Fig. t, so that a certain amount ot play will be allowed between the lever and a piece 65" carried by the spindle, and having an enlarged head above the end ot the lever. The initial upward movement et lever 63 takes up the lost motion and theV continued movement of the lever will bring it against the piece 65' to open the valve.

' The valve casing is formed with a passage 66 leading from the upper end of cylinder lll to the discharge pipe 18. A portion of the water entering through pipe 12 is permitted to escape through the passage 66, the amount being regulated by a valve at the end ot the threaded piece 66. rllhe amount ot water so escaping is much less than that whichdows inwardthrough the valve 64 so that the piston 15 will be forced downward irrespective of the fact that some of the water escapes through the passage 66. 'lhe leakage water which passes upward around the lower part of the valve spindle tit escapes through a passage 67 into the waste pipe 18. When the temperature of the steam flowing through the main 1 falls to a point which reduces the pressure in coil 2 sutlicient to allow valve 64 to be closed by spring 9', the counterweight 162 attached to lever 16, will return the piston 15 to its normalposltlon, the water in the cylinder escaping through passage 66 and pipe 18. Fig. 5 shows certain modifications of the apparatus of Fig.v 2. 'lhis form employs a knife edge 68 and shackle 69 for transmitting lthe force from spring 9 to lever 63. The connection between the end of lever 63 and the valve spindle 64' has been modified by attaching a piece 70 to the end of the lever by a screw, as shown. Also in this form the threaded piece 66', for throttling the water flowing through passage 66, is carried by a sleeve 662.

The diaphragm and its casin have also been changed as indicated,'that 1s, the member 71 in which the strut 61 is supported, is held by bolts 7l', and in common with the first form described is ot substantial construction in order to provide the rigidity and strength necessary for forming and maintaining a good joint at the edges of diaphragm 72. As shown, in the enlarged view llig. 9, the member 71 1s formed with a projection 712 and the diaphragm is firmly held between said projection and a corresponding depression in the base member 73. The lower end of strut 6l is seated in a cap 6l. which lits into the central depression of diaphragm 72. The diaphragm has only a slight upward movement which is allowed for b providing a clearance as indicated at 72', t e form of the diaphragm being of importance in the construction and operation of the apparatus. The amount that the cap 6l and strut 61 can rise is limited by allowing the roper clearance above the top of the cap an the face 713 ot member-71. A certain amount ot clearance is lett between the top of the projecting stop 59 and the lower part of the diaphragm, this clearance being so regulated that should the strut 61 be forced downward to bring the diaphragm rmly against the stop, there will be no injury to the diaphragm. The form of diaphragm here shown is covered by my application, Serial No. 258,430 which is tiled of even date.

Figs. 10 to 1li show a balanced valve for admitting water to the power piston, said valve comprising two members 7d and 75 screwed together as indicated and having, respectively, two faces 74 and 75 of the same form and dimensions. 'llhese valve faces 76 an 77. The member 78, on which the'valve seat. The valve casing is formed with a passage 12 leading from the pipe l2 is formed the seat 76, is removably held by a pin 78 passed through its lower end. By making the valve face 74 and its seat 76 of the same form and size as the face 75' and its seat 77, the valve will be balanced and will require but little force to open and close it as compared with -an unbalanced valve having the same capacity for the flow of water.

Figs. 15 and 16 illustrate a further modification in the valve for admitting water to the power cylinder and the means for operating it. In this form the valve 79 and its hollow stem 7 9 are preferably made in one piece. lThe body portion of the valve 79 is cylindrical and, when the Valve is raised, moves as a piston in a cylinder formed in the valve casing concentrically with and above which is connected to a source of water under pressure, said passage opening into a space in the casing below the valve so that an upward pressure will be exerted by the water on the valve. In the lower part of the valve body are two ducts 80 through which water is ermitted to flow into the casing above the va ve. In the valve stem 79 arertwo sets of ducts 81 and 82, the latter being normally closed, as shown in Fig. 15, by a spindle 83 connected to the end of lever 63, said 1 ever being actuated by pressure generated in the coil 2 in the superheated steam main 1, as hereinbefore described. The spindle 83 passes through the valve stem 79 to -near the ower end thereof, to provide a chamber 84. The ducts 81 afford communication between the space above the valve 79 and the chamber 84, and the ducts 82 afford communication, when open as shown in Fig. 16, between said chamber and a chamber opening into a passage 85 which latter discharges into the waste pipe 18 through a nipple 852. When the spindle 83 is in its lower-most position so that it covers the ducts 82, the water pressure below and above the valve is equalized as the water is permitted to enter the space above the valve through the ducts 8O and into the chamber 84 through the ducts 81, but cannot escape through the ducts 82. When the spindle 83 is raised by lever 63, the ducts 82 will be uncovered, allowing the water above the valve to discharge to the waste pipe 18 and thus relieve the pressure above the valve. When this occurs, the water pressure below the valve will open it, allowlng the water from pipe 12 to enter the power cylinder 14, the valve in its opening movement causin its stem 7 9 to slide along the spindle 83. urrounding the lower end of the valve stem is a spring 86 between the valve and a cap 87 screwed into the casing, said spring bemi compressed when the valve is raised. W en the superheat is lowered to an extent which will cause the lever 63 to fall, spindle 83 will be moved downward thus closing the ducts 82 and allowing the water pressure to build up in the space above the valve. When the pressure is equalized, the spring 86 will close the valve.

In Fig. 15 the power piston is shown as returning to its normal positionafter the valve 79 has been closed, the water above the piston during this time escaping through the passage 66 and thence to the Waste pipe 18. A drain 14 near the bottom of the cylinder \`-14 conducts any water which may leak by the kdentations 79a to permit engagement of a special tool for the insertion and removal of the seat. The inlet pipe 12 is provided with a strainer 122 to prevent any solid matter being carried in with the Water which operates the power piston.

What I claim and desire to secure by Letters Patent of the United States is 1. In a regulatin device, a movable member, a cylinder angd its piston for moving said member, a valve for controlling the admission of a fluid under constant pressure to said cylinder, a controlling mechanism connected to said valve and actuated by a fluidunder variable pressure and means to return said member to normal position, said cylinder having a perma'- nently open outlet for the discharge of the fluid therefrom.

2. In a temperature regulating device, a movable member, a cylinder and its piston for moving said member, a valve for controlling the admission of a fluid under constant pressure to said cylinder, a closed evaporator having a portion thereof located in the medium Whose temperature is to be regulated, a controlling mechanism connected to said valve and operated by the variable pressure in said evaporator and means to return said member to normal position, said cylinder having a permanently open outlet for the discharge of the fluid therefrom.

U3. In -a regulating device, a movable member, a cylinder and its piston for moving said member, a balanced'valve for controlling the admission of a fluid under constant pressure to said cylinder, a controlling mechanism for said valve and actuated by a fluid undervariable pressure and means to return said member to normal llO . neeaaev open said valve when the pressure against said diaphragm reaches a predetermined amount, means to return said member to normal position, said cylinder having a per-v manently open out-let for the discharge of the uid therefrom.

5. ln a regulating device, a movable member, a cylinder and its iston' for moving said member, a control in mechanism operated by Huid under varia le pressure, a valve to control the admiion of a Huid under constant pressure to said cylinder, said valve having a body member formed as a piston, means normally to apply duid pressure equally on each side of said valve piston, mechanical means normally to hold said valve on its seat and means, operated by said controlling means, to relieve the luid pressure on one side of said piston, whereby the fluid pressure on the other side of the piston will raise said valve from its seat.

6. ln a regulating device, a movable member, a cylinder and its ing said member, a control ing mechanism operated by uid under variable pressure, a valve to control the admimion of a fluid under constant pressure to said cylinder, said valve having a body member formed as lston for mov.

a piston having a chamber therein, ducts in said body member to connect said chamber with the source of duid pressure surround# ing said valve, relief ducts adapted to be connected to said chamber, whereby the pressure therein may be relieved, mechanical means to hold said valve 0n its seat, and a pilot valve, connected to said controlling means, to open said relief ducts, whereby the Huid pressure surrounding said valve may open said valve against the pressure of said mechanical means.

7. ln a re lating device, a movable member, a cylmder and its piston for moving said member, a controlling mechanism operated by luidunder variable pressure,

f a valve to control the admission of a duid under constant pressure to said cylinder, said valve having a body member formed as a piston, means normally to appl luid pressure equally on each side of sai valve piston, mechanical means normally to hold said valve on its seat and means, operated by said controlling means, to relieve the Huid ressure on one side of said piston, where y the duid pressure on the other side of the piston will raise said valve from its mat, and means to return said power actu;- atedA member to-normal position, said cylinder for actuating said member having a permanently open outlet for the discharge of the luid therefrom.

lin testimony whereof l: have hereunto signed my name in the presence of two subscribing Witnesses.

navno s. ,tacones Witnesses T. Foi-fome Jona A.. W. on,

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