US114806A

US114806A - Improvement in stove-pipe dampers

Info

Publication number: US114806A
Authority: US
Publication date: 1871-05-16
Anticipated expiration: 1888-05-16

Description

- 3 Svh eets-S*hee 1. E. R. HALL & D. A. KEYES Improvement in St'oye-Pip'e Dampers. N0. 114,806. Patnted Ma 1,y`l6187.

3 Sheets-Sheet 2I E. R. HALL & D. A. KEYES. Improvement n Stove-P,ipe Dampers.

Patented May1,1871.

3 Sheets-Shee 3. -E. R. HALL 8L D. A'. KEYES.

Improvement in Stove-Pipe Dampers. l No. 114,806, Patented May 16,1871.

m. RML- anto site anni effin;

-ELI R. HALL AND DANIEL A. KEYES, CE NORFOLK, CONNECTICUT.

Letters Patent No. 114,806, dated May 16, 1871.

IMPROVEMENT IN STOVE-PIPE DMPERS.

The Schedule referred to ln these Letters P'atent and making y xt of the same.

`l'o all whom fit 'may concern s 'Be it known that we, ELI R. HALL and DANIEL A. KEYES, both of Norfolk, county of Litchfield and State of Connecticut, have invented au Improvement in Stove-Dampers; and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing making part of this specification-` Figure 1 being a side velevation of a damper at rest, opening the full draught of the stove.

Figure 2 is also aside elevation ofthe same, show-l .ing the wings or segments forming the damper in a horizontal position, closing the draught.

Figure 3 is a top view of fig. 2.

Figure 4 represents a planv of the two segments or securing, at right angles, two cylindrical bands, A A',

which sel-veto retain the damper in position, and upon which to mount the shaft B, to which the various moving parts are secured.

At the lower side of the perpendicular band A is formed a step, D, which retains the lower end of the shaft.B in position upon the band A, while the upper End, E, passes through the band at c, as shown in To this perpendicular shaft B, at or near the center,

itis secured, in any convenient manner, a cross-bar, F,

'Ijo this cross-bar, at s s s s, are pivoted the segments or wings forming the damper proper, which,

when closed, as in figs. 2 and 4, completely cut off the draught.

These wings or segments of a circle, when at rest,

'The pressure of the draught through the pipe and against the lower surfaces of the segments, standing at an angle, causes them to rotate and to move perpendicularly through the are of a circle, of which the 'cross-bar, to which they are secured, is the center, lthereby lessening the draught as they continue to approach a horizontal position, as in figs. 2, 3, and 4.

In order to return .these wings or segments of a circle to their original position when at rest, as in tig. 1, and to adjust and retain them to the pressure of the draught through the pipe to open. and close it, as

the case may be, governing-weights I rest upon each segment, and are pivoted, by armsJ, to the upper end of the shaft B at u thus, when a rotating motion is given to the segments'R by the pressure ofthe draught through the pipe, the centrifugal force imparted to the governing-weights I causes them to rise, allowing the segments R to decrease the draught by lessening the passage, and as the draught decreases the velocity of the segments and their governing-weights, being pivoted to the same shaft, also decrease, and the falling ofthe weights opens the segments or wings, adjusting themselves and maintainiu ga steady and equal draught at all times, regardless of the amount of tire.

To prevent these segments passing a horizontal posit-ion in 'a strong draught, they are each a triie more than a semicircle, overlapping each other, as shown in figs. 2, 3, and 4, so that in an extreme draught they will close entirely the passage in the pipe, and so remain until the iire shall subside to the required dcgree.

It willbe observed that when the draught is the strongest the governing-weights are nearer the outer edges ofthe segments or wings, imparting greater weight to govern the increased draught, and witha lower tire, and consequently less draught, the segments open by the falling of the governing-weights, which, as they approach the center of ,the segments, impart less weight and render the segments more sensitive.

What we claim as our invention, and desire to secure by Letters Patent, is-

A stove-or furnace-damper, constructed in segments and governed by adjustable weights, the whole being self-acting, and arranged substautiallyas herein set forth.

'ELI R. HALL.

DANIEL A. KEYES.

Vitnesses:

HInAM I. LAWRENCE, WATSON E. BnNoT.