US1112505A

US1112505A - Automatic damper for stovepipes.

Info

Publication number: US1112505A
Authority: US
Inventors: Charles S Waybright
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-11-26
Filing date: 1913-11-26
Publication date: 1914-10-06
Anticipated expiration: 1931-10-06

Description

G. S. WAYBRIGHT.

AUTOMATIG DAMPER FOR STOVBPIPES.

APPLICATION FILED NOV. 26, 1913.

Patented Oct. 6, 191 4.

@t autumn WITNESSES ATTORNEY O PHOTCFLITHQ, WASHINGTON. D, c

UNITED sTATEs PATENT ornic.

CHARLES S. WAYBRIGI-IT, OF STAUNTON, VIRGINIA.

AUTOMATIC DAMPER FOR STOVEPIPES.

To all whom it may concern:

Be it known that 1, CHARLES S. WAY- BRIGHT, a citizen of the United States, residing at Staunton, in the county of Augusta and State of Virginia, have invented a new and useful Automatic Damper for Stovepipes, of which the following is a specification.

The invention relates to improvements in automatic dampers for stove pipes, chimneys, smoke stacks, and the like.

The object of the present invention is to improve the construction of automatic dampers, and to provide a simple, efficient and inexpensive damper adapted to be easily and quickly applied to a stove pipe, and capable of automatically closing when the draft through the stove pipe is increased by the heat and products of combustion from a fire, whereby the fire is controlled and a saving of fuel is efiected.

A further object of the invention is to provide an exceedingly sensitive automatic damper equipped with an adjustable weight, adapted to partially counterbalance the damper to render the same as sensitive as desired, and capable of being arranged to maintain the damper either in an open or closed position and adapted also in the final movement of the damper toward its closed position to assist the draft in producing a positive closing of the damper and also to cause the damper to remain in its closed position until there is a material decrease in the draft through the checking of the fire.

Another object of the invention is to pro vide a damper having a relatively small closing movement and to arrange the same so that it will not stick in its closed position through accumulation of soot, or become wedged in such position by the contraction of the stove pipe incident to the cooling thereof.

It is also the object of the invention to enable the damper to be positively maintained in an open position by the counter balancing weight, so that a fire may be maintained to the desired degree without being affected by the checking action of the damper in its automatic operation thereof.

With these and other objects in View, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims hereto appended; it being understood that Specification of Letters Patent.

Application filed November 26, 1913.

Patented Oct. 6, 1914. Serial No. 803,300.

various changes in the form, proportion size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing :Figure 1 is a side elevation of an automatic damper, constructed in accordance with this invention and shown applied to a stove pipe, the latter being partly broken away and the damper being shown in its open position. Fig. 2 is a longitudinal sectional View of the same, the damper being closed. Fig. 3 is a vertical sectional View, taken at right angles to Fig.

2, the damper being in its closed position. Fig. 4 is a horizontal sectional View, the damper being closed.

Like numerals of reference designate corresponding parts in all the figures of the 7 A drawing.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention, 1 designates an oblong damper,

constructed of sheet metal and mounted, within a vertical stove pipe 2 on a horizontal shaft 3, arranged eccentrically of the damper and extending across the same near the upper end 4 thereof, the depending portion of the damper or that portion below the edge being approximately arcuate and formmg substantially a semi-clrcle and arrangedv concentric with and spaced from the adja- The cent inner face of the stove pipe when the damper is in 1ts closed posltlon, as clearly illustrated in Fig. 4 of the drawing. The intermediate portion of the damper is preferably provided with straight parallel side edges 6, which are spaced from the stove pipe and the lower portion 7 of the" damper is tapered, the side edges 8 being curved as shown to arrange them in spaced relation wlth the inner face of the stove pipe.

the draft and be acted upon by the same.

The damper in closing swings from the slightly inclined position shown in Fig. 1

The lower portion 7 is also curved longitudinally to enable the damper to catch to the position illustrated in Fig. 2, the depending portion of the damper being carried in the direction of the arrow in Fig. 1 until the lower end contacts with the opposite side of the stove pipe. Owing to the elongated or oblong damper and its inclination within the stove pipe, a comparatively small amount of movement carries it from its open to its closed position and there is no liability of the contacting lower end of the damper sticking in the stove pipe either through an accumulation of soot or by be--! coming wedged in the stove pipe when the latter contracts in cooling. In order to prevent any accumulation of soot at the place where thelower end of the damper strikes the stove pipe, the damper is provided at the said lower end with a notch 9, forming a draft opening at the inner face of the stove pipe when the damper is. closed, so that the upward passage of air and products of combustion will blow away the soot and prevent any accumulation of the same where the damper contacts with the stove pipe.

The shaft 3 is composed of straight side portions and a central downwardly extending bend 10 having converging sides and a straight transverse connecting portion. The damper is provided. with central and

side tongues

11 and 12, formed integral with the damper by partially severing the material thereof and engaging the shaft at the transverse portion of the bend and at the straight side portions of the shaft. By this construction, the shaft is adapted to be readily arranged in opposite perforations of a stove pipe from the exterior thereof by being passed through one of the perforations and extended through the opposite perforation. After the shaft is placed in position with. the bend extending downwardly, the tongues of the damper may be readily engaged with the bends and side portions of the shaft, which will hold the damper against lateral. movement and at the same time lock the damper to the shaft. The tongues are of a length to project downwardly beneath the shaft and may be readilv ent around the same to positively conline the damper on the shaft.

One end of the shaft is extended upwardly at 13 and is bent to form an outwardly extending approximately ti-shaped arm 14-, the upper side of the arm 1% being bent inwardly and extend ed beyond the vertical plane of the shaft to provide an inner arm 15. The outwardly extending arm 14; is provided in its lower side with a plurality of short bends 16, forming notches or recesses closed at the top by the upper side of the arm and adapted to be engaged by a hook 17 of the weight 5. The weight 5, which partially counter-balances the damper, is adapted. to be adjusted inwardly or outwardly on the arm 14:, its counterbalancing effect increasing as it is moved away from the shaft. The outer arm 14- is preferably of su'llicient length so that when the weight is placed in the outer notch or recess, it will close the damper and maintain the same in its closed position. By adjusting the weight in the other notches, the damper may be made more or less sensitive to the draft to enable a tire of the desired character to be maintained. The upwardly bent portion 13 offsets the arm l t and the weight 5 from the shaft, and in the closing movement of the damper causes the weight to swing away from the vertical plane of the shaft and increase the leverage for secreting a positive closing movement.

The draft catching the lower curved por tion of the inclined damper tends to swing the same in the direction of the arrow in Fig. 1, and when it becomes suliiciently strong will move the same to its closed po sition. During this movement of the claim per the weight is carried outwardly from the position shown in Fig. l, as illustrated in Fig. and it assists the draft in producing a positive closing of the damper, and the damper is maintained in its closed position until the draft materially decreases through the checking of the fire. The arm 15 has its free end 18 upturned and is pro vidcd adjacent to the same with a. downward bend 19, forming a recess to receive the hook of the weight, which is adapted to be hung on the arm 15 for maintaining the damper urits open position while starting a fire and also when it is desired to prevent the autoi'natic operation of the damper.

hat is claimed is l. A device of the class described, including a shaft composed of straight side portions and an intermediate bend, said shaft being adapted to be passed through perforations of a stove pipe from the exterior thereof, and a substantially oblong damper of greater length than the diameter of a stove pipe, so as to occupy an inclined position therein when closed, and provided at its center with spaced side tongues for engaging the side portions of the shaft, and having an intermediate tongue for engaging the bend of the shaft, whereby the damper is locked to the shaft and is held against relative lateral and rotary movement, said intermediate and side tongues forming downwardly extending hooks to enable them to be readily engaged with the shaft after the latter has been passed through the opposite sides of a stove pipe.

2. A device of the class described, including a damper consisting of a substaintially oblong plate having upper and lower portions arranged in substantially the same plane, said damper being eccentrically pivoted at its upper portion and being of a length considerably greater than the diameter of a stove pipe, so as to occupy an inclined position therein when closed, said damper being tapered at its lower portion to form a contacting lower end and having a substantially arcuate upper edge arranged in spaced relation with the stove pipe when the damper is in its closed position.

3. A device of the class described including a substantially oblong damper eccentrically pivoted at its upper portion and being of a length considerably greater than the diameter of a stove pipe so as to 00- cupy an inclined position therein when closed, said damper being tapered at the lower portion to form a contacting lower end and provided thereat with a notch adapted to form a draft opening for blowing away the soot and for preventing an accumulation of the same on the stove pipe at the place of contact with the damper.

at. A device of the class described including an oblong damper of considerably greater length than the diameter of a pipe so as to occupy an inclined position therein when closed, said damper being eccentrically pivoted at its upped portion and having its lower portion bowed or curved longitudinally and presenting a concave face to the draft to enable it to catch the same.

5. A device of the class described including a. damper, a shaft eccentrically pivoting the damper and bent outwardly at one end into a substantially U-shaped arm, the latter having one of its sides extended inwardly beyond the vertical plane of the shaft to form an inner arm, the other side of the outwardly extending arm being provided with a plurality of notches or recesses, and a weight having means for engaging the said notches or recesses and adapted also to be arranged on the inner arm.

6. A device of the class described including a damper, a shaft eccentrically pivoting the damper and bent outwardly at one end into a substantially U-shaped arm, the latter having one of its sides extended inwardly beyond the vertical plane of the shaft to form an inner arm, the latter having an upturned terminal and provided adjacent to the same with a bend, and a weight having means for adjustably engaging the outwardly extending arm and for detachably engaging the said bend of the inner arm.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

CHARLES S. WVAYBRIGHT.

Witnesses:

JOHN H. Sreenns, DAVID R. WAGNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.