US893609A

US893609A - Damper-regulator.

Info

Publication number: US893609A
Application number: US39070507A
Authority: US
Inventors: William P Dennis
Original assignee: WILLIAM EWERS
Current assignee: WILLIAM EWERS
Priority date: 1907-08-30
Filing date: 1907-08-30
Publication date: 1908-07-21
Anticipated expiration: 1925-07-21

Description

- PATENTED JULY 21, 1908.

w. P. DENNIS. DAMPER REGULATOR.

APPLICATION FILED AUG. 30. 1907.

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WITNESSES:

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PATENTED JULY 21, 1908.

W. P. DENNIS.

DAMPER REGULATOR.

- .APPLIGATION FILED AUG. 30. 1907.

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INVENTOR.

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WITNESSES.

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PATENTED JULY 21, 1908.

W. P. DENNIS.

DAMPER REGULATOR. APPLVIOATION FILED AUG. 30, 1907.

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INVENTOR.

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UNITED STATES PATENT OFFICE.

WILLIAM P. DENNIS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WILLIAM EWERS,

- OF PHILADELPHIA, PENNSYLVANIA.

DAMPER-REGULATOR.

Specification of Letters Patent.

, Patented July 21, 1908.

To all whom it may concern:

Be it known that I, WILLIAM P. DENNIS, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Damper- Regulators, of which the following is a specification.

This invention relates to improvements in damper regulators and particularly to that class controlled directly or indirectly by the fluctuations of steam pressure in the boilers whose furnace stack draft is to be regulated.

The objects of the improvement are, first, to provide an apparatus that shall be instantly responsive in action to a-change in steam pressure in such boilers, in correcting either an excess or deficiency, if within its scope, thus maintaining uniformity of pressure. Second, to provide such devices as are not readily disarranged but durable and efficient in character and in which the operative arts are easily accessible without dismountapparatus, including the pipe connections.

Fig. 2, is a plan view of the same. Fig. 3. 1s a front elevation of the controlling valve.

Fig. 4,is a longitudinal section of Fig. 3 showing the controlling valve admitting fluid to operate the damper in one direction. Fig. 5, is a similar view showing the controlling valve in an opposite position. Fig. 6, is a side elevation of the actuating mechanism, partially in section, showing the valve and piston construction. Fig. 7, is a partial front view of the piston valve stem attachment. Fig. 8, is a cross section of the controlling valve taken on line a-c, of Fig. 6. Fig. 9, is a cross section taken on line bb, of Fig. 8. Fig. 10,is a detail of the piston valve. Fig. -11, is a cross section of the same, taken on line cc, of Fig. 10, and, Fi 12, is a partial rear end view of the contro ling valve.

The apparatus comprises a plate 1, adapted to be secured by bracketsnot shown to a wall or other substantial support, conveniently located with reference to the boiler and stack. On the upper face and near oneend of theplate is a valve chamber 2, having the domed cover 3, and ,a diaphragm 4, secured between the flanges of the valve chamber and its cover, which are bolt-- ed as indicated. The space below the diahragm 4, and also the connecting p pe A eading-to the boilers, is filled with a liquid, as water, to about the height of the union A so that the steam pressure of the boilers may be directly exerted on the diaphragm when the valve A, is open but the heat therein prevented from transmission to and hence injuring the material of which the diaphragm is made.

Passing through the top of the cover 3a nd maintained vertically by a proper bearing formed therein, is the plunger 5, connected at the lower end to the diaphragm andin such manner as to be operated by 1t. The cover 3, has an integral upwardly projeotmg outer rib with an overhanging end 3, slotted to receive the end of the beam 6, in the recess thus formed and is provided with a seat in its'lower edges for-the angular knife-edge,

ivot bearing ,6, set in the beam. This bar is further provided with another similar bearing 6, attached to the beam in a reversed position, in register and to engage with the plunger 5, so that any lateral motion thereof is communicated directly to the beam 6, held down .by the pull of the weights 7,.depending from the outerend of the said beam. A sliding counter weight 8, 1s also adjustably connected'to the beam, between the endent weights and the beam guide 9. his latter comprises a standard, secured cess for the passage of the beam, and

screws

9 and 9", limiting the movement of the beam up and down respectively; a hand screw 10, set in a projection of the standard, provides-means for locking the beamagamst an movement if desirable.

The damper.not shown-is intended to to the plate 1, having a slotted rebe connected with the end of the lever 11,

sage

' stroke, contacting with the inwardly projecting hub of the cap 16. At the other end of the stroke similar provision is made against excess movement by allowing the hub of the lower disk 17 to strike against the inner end of the stuffing box 15.

The cylinder 18, has an annular flange 18 midway of its length, adapted to be detachably secured to the plate 1; and it is further provided with

ports

19 and 20 for the admission of the actuating medium either above or below the piston 17, operating the same thereby.

Water, compressed-air, steam or other fluid under pressure is admitted from the pipe B, to the cylinder 18, through the valve casing 21, by means of the piston'valve' 22,

" which passes upwardly through the stuffing box 23, and is attached at its upper end to a pivoted connecting member 24, having a means of adjustment at 25, and detachably pivoted to the beam 6, but at one side thereof and not directly underneath, thereby affording means for conveniently disconnecting without disturbing the beam.

A single inlet 30, formed transversely to the valve and two

outlet passages

31 and 32, communicating directly with the

ports

19 and 20, are formed respectively above and below theinlet 30 and in the same vertical plane but so that either or both may be closed from communicating with. it by the piston valve 22, which intersects with the ends of all these openings.

In one side of the body is formed a bypass 33, having its upper terminus within the ore of the'valve 22, at right angles to the other passages and slightly above the upper outlet 31.- Its lower end opens within the recess at the bottom of the valve body. 7

The piston valve 22, is of solid cylindrical construction, having two reduced diametrical ,ortions 31 and 32, providing a pasetween the inlet 30 and outlets 31. and 32, as the valve is moved up ordown. When the valve is raised a passage is opened be tween the inlet 30 and outlet 31, around the reduced portion, admitting a currentof fluid,

while at the same time, the outlet 32 is open to exhaust from. the cylinder through the bottom. port of the valve body. When the valve is down a similar assage-way is made between the inlet 30 and outlet 32, while exhaust from the cylinder takes place through the outlet 31, around the reduced area31, to

the by-pass'33, and then out at the bottom of the valve body. If the valve be at a midposition obviously no passage of fluids can take place. I 1

In the reduced portions of the valve I provide transverse holes 22 in order that the passage of fluids maybe as free and unrestricted as ossibleand find the said holes result in a M more rapid and satisfactory action, besides which a more perfectly balanced valve is obtained.

The cylinder ports19 and 20, are formed in a projecting member 35, attached to the cylinder 18, and connected to the valve 21, by the coupling or look nut 36 the face of the port containing me mb r35, is provided with depressions immediately surrounding the ort openings adapted to receive correspondmg projections onthe end of the valve body 21., the said projections entering into the depressions in the port member 35, and being maintained against rotary motion thereby, as in connecting the valve body.

I have shown the connections as made with a right and left thread on the contacting members and a correspondingly threaded nut, but obviously I may use any form of a union preferable.

In operation, steam from the boiler being connected to pipes A, water to pipe B,and the damper operatively attached to the lever 11, any excess of steam pressure in pipe A, raises the diaphragm and hence the beam together with its weights and the valve 22; whereupon fluid from the piple B enters the valve body 21, passes throug the lower passage past and partially through the opening 22, in the valve 22, and enters the cylinder .18 through the port 20, raising the valve 17,

through its rod 14, operating the lever, 11, in

draft.

Obviously, the several weights on the beam may be adjusted to meet any steam pressure re uirements desirable and when so adjusted wi 1 act operatively if their balance be overcome, as above described or reversely upon occasion.

I am aware that devices for such purposes have long been in use, hence do not seek to cover the same broadly, but believe that devices possessing the peculiar characteristics of my invention to -be new,

Therefore having described the same, what I claim and desire to secure by Letters Patenii is; d I

n a am or re ator a su ortin bracket havifig mo ii ted thereon h dia phragbm chamber having connections leading to a oiler, a diaphragm contained therein and an upwardly projecting rod moved by said diap ragm an arm pivoted and connected to the dia hragm. r'od'to bemoved thereby, said arm aving at its 11 per end a suspended series of welghts and a sliding weight, a sup orting column attached to the other end 0? the bracket. having a 'slot through which the pivoted arm asses, and

adjustable screws forming stops or regulating the movement of sai arm, a cylinder, a piston therein and piston rod, said rod being connected at its-lower end to a lever pivoted to the under side of the bracket and having connections to a damper, a regulating valve casing having two ports on one side connected to opposite ends of the piston cham ber, andan lnlet port located iametrically opposite to the outlet orts but between the same, the lower end 0 said valve casing being connected to an exhaust pipe, said casing having a by-pass connecting its upper end with the exhaust passage, and a piston valve working in said valve casing, the-upper end of which is connected to the diaphragm op erated arm, saidpiston valve rovided with reduced areas so arranged t at. when the aust, and that when said. piston isthe by-pass with the exhaust, said piston at 7 its reduced ortions having transverse passages throug it for the passage of fluid from the inlet to an outlet port.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM P. DENNIS. Witnesses I WARREN E. WILLIS, EUGENE V. CoooEY.