US235544A - Automatic damper-regulator - Google Patents

Description

(No Model.)

` H. LYONS. Automatic Damper` Regulator.v

10.235,544. y Patented Dec. 14,1830,v

uliillmm N,PErF.RS, Pl-limLITMOGRAFNER4 WASHINGTON D C V{inurl-3D STATES -HUGH` LYONS, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF CORTRITE, OF LANSING, MICHIGAN.

To HENRY v AUTOMATIC- DAlllflPER-REGULATOR.

p SPECIFICATIONforming part of Letters Patent No. 235,544, dated December 14, 1880.

Application led October 23,1880. (No model.)

To alt/whom it may concern:

Be it known that L'HUGH LYoNs, of Ghi-. cago, in the county of Cook and State of Illinois, have invented certain new and useful lm- 5 provemcnts in an Automatic Damper-Regulator for Steam-Boilers 3 and I do hereby declare the following to 4be a full, clear, and exact de-` scription of the invention, that will enable` others skilled in the art to which it appertains 1o" to construct and make use of the same, reference being had to the accompanying drawings, and to the letters and igures of reference marked thereon, forming a part of this specication. Y y Figure l is a vertical longitudinal section of my'improved damper-regulatomFi g. 2, a view ofthe same, taken Vin a plane at right angles relative to Fig. l.

The object of Vthis invention is an improve- 2o ment in"damperregulators for steam-boilers, whereby a uniform Vpressure of steam may be maintained; and it consists of certain novel features in the construction and operation of i the same, as will be hereinafter more fully del y the upper end of the loose valve-stem passes 7 5 2 5 scribed in detail, and set forth in the claims.

Referring to the drawings, Ay represents a east-metal casing or butt. B is the cylinder; C, the piston; D, the piston-rod, and E the cap covering the upper end of the cylindrical 3o body B.

The casing A is chambered for the reception of the piston-valve a, as shown in the drawings, the steam entering the valve-chamber at 3, and passing` through the receiving steam- 3 5 ports 4 in the under side of the valve a, into ,the annular recess or groove 5 cut in the periphery of the valve at a point a little above the lower end of the valve, as shown in the drawings. The steam passes to the cylinder 4o B through the steam-passage 6, the steam exhausting from the cylinder through the passage 7 into the upper annular recess, 8, in the valve, and thence into the atmosphere through the exhaust-port 9.

The object of the annular recesses in the piston-valve is that it permits the steam to pass clear around the valve at these points, giving an equal pressure on all sides of the valve alike, imparting to the same something 5o of the nature and action of a balance-valve,

obviating the liability of the valve sticking or becoming fast in the valve-chamber, and insuring' a more positive and certain action o the same. Y

The greatest objection to this class of damper-regulators has been the liability of the valve to become stuck by-having the pressure of the steam all on one side, which would often prevent the prompt action of the valve, and consequently the movement of the damper 6o also.

The piston-valve is cylindrical in form, and has, substantially, a steam-tight bearing on the walls inclosing the valve-chamber. The` upper end ofthe valve is provided with the conical cavity or recess l() directly in the center of the same, this recess being for the reception of the lower end of the loose valvestem 1l, which is of a corresponding shape relative to the conical recess in the valve, as 7o shown in the drawings. The upper end of the loose valve-stein is also cone-shaped, andits into a recess in the lever l2.

The aperture in the casing A, through which to engage with the under side of the lever l2, should be a little smaller than thelargest part of the conical recess l0 in the valve, so that in play the valve-stem will have no contact or bearing" on the valve other than on the eX- 8o treme lower point of the same. Should the valve-stem bear against the sides of the con-` ical-shaped recess it would have a tendency to bind the valve and prevent a free movement of the same. By this form of construction and arrangement of these parts the pistonvalve is susceptible of a very sensitive action, and allowed but a slight variation of the steampressure either way before the damper is opened or closed. 9o

The loose valve-stem is also provided with a shoulder, 13, which serves to prevent the valve-stem from dropping out of place each time that the lever 12 is removed and the device inverted. Much annoyanceisexperienced from the dropping out and loss of this loose valve-stein, from the fact that it is required to be of certain dimensions and of just such a length.

The piston-valve is prevented from moving roo below a certain point by means of the pin or bolt 14.

The outer end ofthe lever 12 is broken away; but in practical use the same is provided with a graduating-scale and properly weighted.

As these features are neither new nor novel they are omitted from lthe description and drawings.

Attached to the piston-rod D is the toothed rack 15, which is adapted to engage with the pinion 16 placed on the shaft 17, which, in addition, carries the pulley 18 and the coiled spring J9, the shaft 17 resting in the bearings 20 placed upon the upper side ot' the cylindercap E. In practical use one end ot' the operating-cord is attached to and passes around the grooved pulley 18, the other end leading to and being attached to the lever operatingl the damper. The object ofthe coiled springis to assist in forcing the piston on the downward stroke, thereby especially adapting the device to be used in connection with a low-pressure boiler, or to operate equally as well under a low pressure of steam as under a high pressure, this being an objection to all of the damper-rcgulators now in use, from the fact that none of them would operate a damper under .a pressure of less than twenty pounds.

One end of the coiled spring 19 is attached to the cap E and the opposite end inserted in the shaft 17, and so larranged that the upward movement ofthe piston will store up power in the spring to be exerted in forcing the piston downward.

The casing A, the cylinder B, and cap E are all distinct parts, and are clamped together by vmeans ot' the rods or bolts 21.

The operation of this apparatus is as follows: The steam being admitted into thelower end of the valve-chamber, the valve is forced upward until the steam-passage leading to the cylinder is uncovered, when the steam passes into the cylinder, forcing the piston upward, which movement causes the pinion to rotate by means of its engagement with the toothed rack attached to the piston-rod. The upward movement of the piston closes the damper by means ot the cord connecting the pulley 18 and the damper, the cord being wound around 5o the pulley as it rotates7 and when the piston descends the cord is slackened and the weight on the damper causes the same to open.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 5 5 1s l. In a damper-regulator, the piston-valve a, having the steam-receiving ports 4, and provided with the annular recesses or grooves 5 and 8, thereby adapting the valve to have an 6o equal pressure on all sides alike, substantially as and for the purpose described.

2. In a damper-regulator ot' the character hereinbefore described, the combination, with the casing A, provided with a chamber on the interior thereof, ofthe piston-Valve a, provided with the annular recesses or grooves 5 and 8 and the conical cavity 10, and the loose valvestem 11, provided with the shoulder 13, substantially as and for the purpose herein de- 7o scribed.

8. In a damper-regulator, thercombination, with the cylinder B and the casing A, of the piston-valve a, provided with the annularv grooves 5 and 8, all constructed and arranged 75 for operation substantially as herein shown, and for the purpose described.

4. In a damper-regulator, the combination, with the piston-rod D, of the toothed rack 15, the pinion 16, the shaft 17, the coiled spring 8o 1.9, and the pulley 18, substantially as described.

HUGH LYON Sd.

Witnesses T. L. FoRREs'r, L. A. BUNTING.

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