US693221A - Automatic steam-pressure regulator. - Google Patents

Description

'Nn. 693,221. Patented Feb. 11 |902. n. P. LouNT.

AUTOMATIC STEAM PRESSURE REGULATOR.

(Application led July 19, 1901.; (No Model.) 2 Sheets-Sheet l..

No. 693,22l. Patented AFeb. Il, |902. ,D. P.`ABL0UNT. l

AUTOMATIC STEAM PRESSURE REGULATOR.

(Applicatian led July 19, 1901.) (No Mgdol.) I 2 Sheets-$heet 2`.

' if/W@ fa? @M UNITED STATI-js PATENT OFFICE.

DAVID I. BLOUNT,IOF NORFOLK, VIRGINIA.

AUTOMATIC STEAM-PRESSURE. REGULATOR.

SPECIFICATION forming partof Letters Patent No. 693,221, dated February 11, 1902.

Application ied'Juiy 19, V1901,.

To ctZZ whom, t may concern:

Be it known that LDAvID P. BLOUNT, a citizen of the United States, residing at Norfolk, in the county of Norfolk and State of Virginia, have invented new and useful Improvements in Automatic Steam-Pressure Regulators, of which the following is a specification.

My invention relates to an automatic steampressure regulator or governor` and the object of the same is to construct a device which will keep the steam-pressure almost constant without Waste of'fuell and steam. f

` With this end in view I have connected a pressure-regulator to simultaneously operate a furnace-spray, a smoke-stack damper, and' an ash-pit damper, thereby regulating the draft and shutting od the spray when not re- A quired. This is accomplished by the simple and novel construction described in this specification and claimed, and illustrated in the accompanying drawings,forming a partthereof, in which- Figure 1 is a side elevation, partially in section, of a steam-boiler and furnace with my device attached thereto. Fig. 2 vis a transverse section on the line 2 2, Fig. 1. Fig. 3 is a front elevation of the furnace with the pressure-regulator and connecting mechanism removed. Fig. 4 is a detail of the sprays. `Like numerals of reference designate like parts in the different views of the drawings. The numeral 1 designates a stationary steam-boiler walled in, as is usual, land having a furnace 2 and an ash-pit 3, separated by grate-bars 4. A bridge-wall 5 at the back of the furnace 2 supports several partitions 6, which split up the ame.

A pair of sprays 7 are located in the front wall of the furnace 2. These lsprays consist of hollow circular rings having perforations S in their front faces. A pipe 9 connects the sprays 7 and is itself connected to a steampi pe 10,which passes back and is joined to the top of the boiler 1. A spring-actuated valve 11- is located in the pipe lO and has a vertical stem 11. The stem 11fL is connected to a flexible wire 12 or cord, which passes up over a pulley 12a, then across and over a pulley 13, mounted on the smoke-stack, and then down, and is connected to one end of crank-bar 14, keyed .on a horizontal shaft 15, carrying a damper 16,mounted in the smoke-stack. The

Serial No. 68,9577. (No model.)

` other end of the bar 14 is pivoted to a conmeeting-rod 17, which extends downwardly and is pivoted at its lower end to a'crank-arm 1%,- key'ed on a shaft 19, carrying a damper 20. The shaft 19 rests in brackets 21 and is detachable. The damper 2O regulates the admission `Qf air into the ash-pit, and therefore the furnace 1. A damper 22 is also mounted in the furnace-door, but forms no part of the present device.

To operate the dampers 2O 16 and the' sprays Y `7 bymeans of the'variation in the steam-pressure, it is only necessary to attach the long arm 23 of alever 24 to the connecting-rod 17. The lever 24 is fu'lcrumed. in a standard 25 and has its short arm 26 connected by a link 27 to the long arm 28 of a second lever 29, which is also connected to a pressure-regulator 30 of any of the known and approved forms. The regulator30 is mounted in a cylinder 30,which is connected to a steam-pipe 31, joined to the boiler 1. The long arm 23 of thelever 24 is weighted bya sliding block 32. This weight insures the immediate operation of the device when `the pressure drops suddenly.

From the connections above described it will be evident that a rise in pressure of the steam will operate the regulator 30 to raise the lever 29, which motion will be lincreased by the lever 2 4 and ytransmitted to the connecting-rod 17, which will be pulled down, ,therebyoperating and closing the dampers 20and 16. The wire 12 will be slackened, permitting the valve 11 to seat and cut off the steam to the sprays. j When the steampressure goes down in response to the diminished draft, the damper and valve willbe operated in the reverse direction through the medium of the levers and the pressure-regulator 30.

By'using an apparatus operating but one damper some of the advantages of my device could be obtained; but I have foundV that in order to obtain prompt and efficient regulation and to save fuel itis necessary to oper- 'ate both dampers, one in the smoke-stack and another in the ash-pit, as shown. This can IOG be accounted for by the fact that if but the ash-pit damper 20 were closed and the smokestack left open the little air coming in through cracks would keep the coal burning and the flame therefrom Would pass up and through the boiler. This heat is sufficient to prevent the rapid reduction of steam-pressure desired. If but the smoke-stack damper 16 was closed by the regulator, the air coming in through the ash-pit damper would keep the coal burning, keep up steam, and cause disagreeable smoking of the furnace. To be sure, the spray would help to keep down the fire, but it is found to be undesirable to spray the fire very heavily, as it becomes very sluggish and fails to respond to the opening of the dampers.

I do not Wish to be limited as to details of construction, as these may be modified in many particulars Without departing from the spirit of my invention. l

Having described my invention, what I claim as new, and Wish to secure by Letters Patent, is-

The combination with a boiler and furnace,

of a spray mounted in said furnace and connected to the boiler by a pipe provided with a spring constructed to normally hold said valve closed, adamper mounted in the smokestack on a shaft provided with a crank-arm, a flexible member connectingsaid crank-arm and said valve, a damper mounted in the front of the ash-pit on a shaft bearing a crankarm, a connecting-rod connecting said crankarms, a lever having its long arm connected to said connecting-rod, a pressure-regulator connected to said boiler, and means for connecting said pressure-regulator to said lever, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit- IleSSeS.

DAVID P. BLOUNT. Witnesses:

GUY E. PADGETT, FRANK G. RADELFINGER.

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