US721429A - Damper for stovepipes. - Google Patents

Description

PATENTED FEB. 24,1903.

' L. F. GUTTEN;

DAMPER FOR STOVEPIPES.

APPLICATION FILED MAY 17 1902.

N0 MODEL.

ze zuy7pj fl il lnve ntar,

By. I

Witnesse s 'Aitorngys tion-point of the handle.

pertains to make and use the same.

UNITED STATES PATENT OFFICE.

' LEWYN FRANK CUT TEN, OF BOISSEVAIN, CANADA.

DAM PER FOR:

STQY'EPIPES.

$PEGIIFIGATIONaforming part of Letters Patent No. 721,429, dated February 24, 1903.

- Application filed May 17, 1992.

To all whom itmay concern:

Be it known that I, LEWYN FRANK CUTTEN, a subject of the King of Great Britain, residing at Boissevain, county of Turtle Mountain, Province of Manitoba, Canada, have invented certain new and useful Improvements in Dampers for Stovepipes; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it ap- My invention relates to an improved form of damper of that type wherein a rotarysleeve is adapted to cover a hole in the side of a Stovepipe, said sleeve having a hole therein adapted to coincide with a hole in the pipe when the damper is properly placed, and thereby to admit more or less cold air thereto;

The object of my'inventionis to overcome a difficulty which exists in this type of damper due to the fact that the force applied to the sleeve to rotate it is not applied cen trallythat isto say, in the body of the sleeve itselfbut it is applied to a handle which projects laterally from the. sleeve, and the necessary force required to overcome the friction of the sleeve against the pipe, combined with the thin and flexible material of which the sleeve is made, causes a distortion of the material of the sleeve, whereby it is caused to bind upon the side of the stovepipe in the manner of a chain wrench applied to a pipe to twist the same.

later on. I

The essential feature of my invention consists in so arranging the handle that it will not cause the said distortion of the sleeve when lateral force is brought upon it to turn the sleeve, and to this end I provide various modes of construction, in particular a belt of metal, which is in the form of either a band or a raised bead surrounding the sleeve of the damper and which may be used in conjunc tion with an upright band or head of similar form which crosses the said belt at the j unc- This will be more fully explained In another form of my invention 1 provide a peculiarly-shaped handle which is adapted to straddle the sleeve of the damper, and

thereby to remove any possible tendency to- SerialNo.107.766. (No model.)

distort the same by a tangential pressure broughtupon said handle.

My invention further consists in the peculiar construction and combination of parts hereinafter described, and'more particularly set forth in the claims.

In the drawings accompanying this specification I have shown three preferred modifications of my invention, and herein :Figures land 2 are respectivelya side elevation and a horizontalsection on the line2 2 of the first form of my invention. Figs. 3 and 4 are respectively a side elevation and a horizontal section on the line 4 4: of the second form of my invention. I Figs. 5 and 6 arerespectively aside elevation and a horizontal section on the line 6 6 of the third form of my invention. 4

The same n u merals of reference denote like parts in all the figures of the drawings.

In all of the figures the stovepipe to which the damperis attached is represented by the I numeral 7, and it;is provided'with a pair of parallel beads 8 9, encircling it at proper suitable distances apart to form guides for the upper and lower side of the damper-sleeve, which is shown at 10in Figs. land 5. The pipe 7 has midway between thesetwo heads '8 and 9 an aperture 11 in the side thereof, with which is adapted to coact a similarlyformed' aperture 12 in the damper-sleeve 10.

7 Now in the dampers at present in use the sleeve 10 consists of a plain cylindrical piece of pipe having a handle-knob 13 attached to and projecting from the rear side thereof, so that by shifting the handle 13 laterally the position of the aperture 12. is changed rela tively to the aperture 11; but the disadvantage of this type has been that the side pressure brought upon the handle-knob l3'in, conjunction with the frictionhas-i'nduced a couple acting in threeways-i-firshfto bend the sleeve in the immediate vicinity ofthe attachment-point 14: of the handle to the sleeve, so as to cause themetal to'be indented at the forward side and raised at the rear side; secondly, the indentation of the sleeve at the forward side of the handle caused a similar indentation in the metal of the pipe, so as to form intermeshing teeth, as it were, which

Images