US112260A - Improvement in stove-pipe dampers - Google Patents

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N w; HA, vLu'rz ass-ign@ to himself s:

FEB 52813 PATl'iNTEn j In elfnlor.

srovE PIPE DAPER. i 1152260 YiA/'ihre sse s.

' .Fm'an. EXP Si, Self-j'aiusng, *f1 l l `"senr AND WILLIAM Bons, or sans PLAGE.

Letters Patent No. 112,260, dated February 28, 1871.

" IMPROVEMENT 'IN STOVE-'PIPE DAMPERS- a'hesaneeumnreuee-temmnmmanammpaeefmem {WILLIAM H. LU'rz, of the city and county of Lancaster', `in the- State of Pennsylvania, have in- Nvcnted a Device tcr'onstitute `im Expansion Selfacting 4Safety- Damper-for StovePipes, of which the following is a 'speciiicatiom The object ofltliis'invention is`the application of the -wellfknown power heat exerts in the expansionl of an I viron ormetallic bar, so combined that said expansion governs `the valve or damper.so as to decrease the amount of draught `aud always-adjust itself to the degree of temperature within the stove-pipe, the parts so graduated as to be adjustable to various condtions.-

'.lhe thawing illustrates `the construction and appli-l vtiomy .4 I I 4 f Figure 1 is a section of a stove-pipe, showing the external parte in perspective. f

Figure 2; the arrangement of the several parts, with the pipe-removed to show the expansion-rod and valve or `damper within the pipe. v

A bxiefexplanation will' enable any one skilled in the, art to make and apply my invention, by reference to thedrawi ng'and letters thereon.

P, iig'. 2, is a section of, an Vordinary.stove-pipe of'` `any desired diameter.

A stout rod oriron bar, A, nearly the length of a section', say twenty inches, is bent at` right angles at both ends, 1 1 a. I The "se ends are thrust through openings iliade in the lpipeto the outside, the upper being an oblong slot, to allow the inner bar A to expand, `'.lhe ends of said `bar may project an inch and a quar- ,ter beyond the ontsideiofwthe pipe above and below. I The upper enda' has'a shoulder, and passes throughl the acting lever B, and on the `end a circular plate is riveted, betweeiiwhichplate and the shoulder the 1ever-bar B and tension-rod are confined. Y Thisl tension-rodi!` hooks through a hole made in "the head'of the `leverd'od'orbar B, the lower end of' said tension-rod being secured through the lower end a of the extension-bar by means of a screw Naud a pair `ofjam#n'uts, G' G. The lower end may be more firmly vsecured byV a brace-plate, H. I

ilhe lever-bar Bisrbent inward to about the centerl between a' a, and is provided with a headed pin, b, that tite into any'fof a. series of notches in a rack, O'.

, To one end of 'this notched rack oneend of an elbowed lever, D', is secured' by a pivot-joint. This lever D'connects in the angle with the shaft o f the damper E, so as to turn vthe saine.

The other arm of the elbowed lever shows aperforation, to which a weight may be hung, if required, in certain cases to govern theaction. y

The elbow is, however, not essential. One leverarm would also act.

'The operation is easily understood. .As the heat', going up the pipe, expands, the inner bar A and the tension -rod F beingrigid, remote, and outside, the expansive force can only operate on the upper end, which, by elevating the lever-bar` B, held-back by the tensionfrod, must necessarily act upon the notched rack 0,' connected with the elbowed lever, andthe damper within the pipe, to close the same more or 'the draught too soon; but when once adjusted the degree of draught will always be in conformity with .the degree of heat, and will not only be self-adjusting, but

prevent that excess of heat in stove-pipes that often provesdestruetive to carpets or property.

is not new, nor do I claim euch a property.

What I claim as my invention, and desire to secure by Letters-Patent, isfj -.The combination 4and varrangeniel'it of. the `bar A c a', lever-bar B,Ia ck 0, a simple or elbowed lever, D,

` and tensionrod E, together with the damper E, operating-substantially-in thev manner and forthe pur pose specified.

Witnesses:

.Wim- B. WILEY,

JACOB STAUFFna.

WILLIAM H.- Lncrz';

I amaware that the mere expansion ot iron byheat

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