US956542A - Automatic damper control. - Google Patents

Description

.H. PETERSON.

AUTOMATIC DAMPER CONTROL.

APPLICATION FILED DEO.16, 1909.

956,542, Patented May 3, 1910.

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ANDREW a GRAHAM c0 FHOTOMTHOGRAPNERS. wAsmNG'rcN. a1;

UNITED STATES PATENT OFFICE.

HJALMAR PETERSON, OF FALUN, WISCONSIN.

AUTOMATIC DAMPER CONTROL.

To all whom it may concern:

Be it known that I, HJALMAR PnTnRsoN, a citizen of the United States, residing at Falun, in the county of Burnett and State of Wisconsin, have invented certain new and useful Improvements in Automatic Damper Controls, of which the following is a specification.

This invention relates to automatic damper controls and is designed particularly for use in steam or hot water heating systems.

The object of this invention is to construct a device of this character which will be operated by the pressure of the steam in the boiler, and which will be adjustable to various pressures.

This invention also contemplates a damper control that will entirely or partially close the damper, and which will be adjustable to various sizes of furnaces.

With the above and other objects in view this invention consists of the construction, combination and arrangement of parts all as hereinafter more fully described, claimed and illustrated in the accompanying drawings, wherein:

Figure 1 is a central longitudinal section of a control constructed in accordance with the present invention illustrating the means of attaching the same to a boiler; Fig. 2 is a section taken along line 22 of Fig. 1; Fig. 3 is a similar view taken along line 33 of Fig. 1; Fig. a is a horizontal section taken along line 44 of Fig. 1.

Referring more particularly to the drawings, the control forming the subject-matter of the present invention comprises a tubular casing 1 having at its upper extremity an inlet port 2, said inlet port being connected to a valve 3, from which extends the supply pipe 4 to the boiler indicated in general as A. At the opposite extremity of the casing 1 is the transverse bridge 5, said bridge being provided with the centrally disposed aperture 6, the lower face of said bridge surrounding the aperture being provided with the downwardly extending flange 7 A piston 8 reciprocates in said casing 1 and forms a chamber B in the same. This piston has an outwardly extending flange 9 about its upper periphery, above which'is carried the leather packing 10 secured thereto by the ring 11. The lower side of the piston has a similar packing 12 likewise secured to the piston by a ring 13, said ring being secured to the ring 11 by a series Specification of Letters Patent.

Application filed December 16, 1909.

Patented May 3, 1910.

Serial No. 533,362.

of bolts 14 extending through the leather packings 10 and 12 and the rings 11 and 13;

.the elements thus combined forming a substantial water tight and air tight piston.

The piston rod 15 is threaded into the piston at its upper extremity and extends through the opening 6 of the bridge and is bifurcated at its lower extremity forming the arms 16. The upper extremity of the piston rod is provided with the longitudinal bore 17, said longitudinal bore extending partially the length of the piston rod and having on the level with the base thereof the faucet 18. In this manner all water of condensation collecting in the chamber B may be drawn therefrom and retain the pressure in said chamber constant with that existing in the boiler A.

Arranged on one side of the casing 1 are the outwardly projecting ears or lugs 19 between which is pivotally connected the link 20, said link being pivotally secured to the operating lever 21, forming a fulcrum for the same. That part of the lever which extends horizontally from the casing is provided with a series of notches 22 on the upper edge thereof in which is adapted to be received the weight 23. The lever adja cent the opening 6 is spanned by thearms 16 of the piston rod and is secured thereto by a pin piercing said lever and arms. Located on the opposite side of the lever 21 and spaced apart a distance equivalentapproximately to the width of the casing are the downwardly projecting ears 24: in which is swivelecl the screw 25, having threaded thereon the sleeve 26, said sleeve constructed with a pair of downwardly projecting arms 27 formed thereon. It will be noticed that upon the rotation of the screw 25, the sleeve 26 can be adjusted with respect to the transverse axis of the casing. A rod 28 is pivoted between the arms 27 and has formed at its lower extremity the laterally extending orificed lugs 29. The damper rod 30, having a plurality of alined openings 31 in its upper extremity, is adapted to be received between the lugs 29 of the rod 28 in such a manner that the openings 31 will register with the similar openings of the lugs, permitting a pin 32 to be passed through the same and supply a vertical adjustment to the damper rod.

From the foregoing it will readily be seen that as the pressure increases in the boiler A, so will the pressure increase in the chamber 13, and when it has increased to such an extent that it overpowers the force of the weight 23 carried on the lever arm, the piston and piston rod will move downwardly, imparting a simliar motion to the damper rod, closing the damper as permitted by the adjustment of the various elements. Thus, the fire will be permitted to cool and the pressure in the boiler to decrease,-'consequently, permitting the piston to rise opening the damper again and permitting the fire to burn more readily.

The provision of the screw 25 will permit the sleeve to be adjusted in such a manner that the damper rod will reciprocate a distance of any ratio to the distance through which the piston reciprocates.

Should the sleeve be located on the screw 25 adjacent the weight arm, the rod will reciprocate very little, while should it be located at the opposite. extremity thereto, the reciprocation thereof will be approximately twice as great as that of the piston. This adjustment permits the damper to have a range of movement varying from a hardly perceptible amount to being entirely closed. The provision of the vertical adjustment of the damper rod is a means whereby the position of the damper may be regulated independent of the screw 25, also a means whereby the automatic control hereinbefore described may be adapted to various sizes of furnaces.

Having thus fully described my invention, what is claimed as new is:

1. An automatic damper control comprising a damper, a cylindrical casing, having an inlet port at its upper extremity and a transverse bridge at the lower, a piston reciprocating in said casing, a piston rod secured to said piston and reciprocating in said bridge, having a longitudinal bore in its upper extremity, a lever pivoted to said casing through the instrumentality of a link, having means for securing the weight at one extremity and a pair of outwardly extending ears at the other, said lever being connected to said piston rod, a screw swiveled in said ears, a sleeve threaded on said screw, and a vertically adjustable damper rod pivotally secured to said sleeve, as and for the purpose set forth.

2. An automatic damper control comprising a cylindrical casing, having an inlet port at its upper extremity and a transverse bridge at the lower, a piston reciprocating in said casing, a partially hollow piston rod secured to said piston and reciprocating in said bridge, a lever pivoted to said casing through the instrumentality of a link, having an adjustable weight at one extremity and the other extremity being secured to the piston rod, adamper rod pivotally connected to said lever, means whereby the stroke of the piston may be regulated in various ratios to the stroke of the damper rod, and a drain cock at the lower extremity of the hollow portion of said piston rod adapted to remove the water of condensation from above the piston.

In testimony whereof I afiix my signature in presence of two witnesses.

HJALMAR PETERSON. lVitnesses JOHN PETERSON, H. HAv'soN.

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