US970598A - Automatic damper. - Google Patents

Description

A. W. ARNOLD.

AUTOMATIC DAMPER.

APPLIoATIoN FILED SEPT. u, 190s.

Patented Sept. 20, 1910.

UNTTED STATES PATENT OFFICE.

ARTHUR W. AR'NOLD, 0F PORTLAND, OREGON, ASSIGNOR TO SAFETY AND ECONOMY DAMPER COMPANY, OF PORTLAND, OREGON, A CORPORATION OF OREGON. i

AUTOMATIC IDAIMPEB.y

Specification of Letters Patent. i l Application led September 8 190,8. Serial No. 452,063.

Patented l Totali whom it may concem:

a citizen ofthe United States Be it known that I, ARTHUR W. ARNOLD, residing at Portland, county of Multnomah, and State of Oregon, (whose address is 423 Sherlock Building,) have invented a new and useful Automatlc Damper, ofvwhich the following is a specification.

' It is a well known physicallaw that heated gases or vapors rise, or have tendency to rise, the velocity with which they .rise being directly proportional to the degree of heat contained therein.- This 'is esy pecially true in flues, pipes, or ychimneys leading from heated furnaces and great difficult has'been experienced in regulating the e ree of heat generated in such furnaces ecause the hotter they become, the greater is .the tendency for the gases to escape and, therefore, the 'greater the suction or draft roduced in such flues, ipes, or

' I chimneys eading therefrom and, t1erefore, the greater the combustion. To utilize the force of the rise of these gases in regulating such draft is one purpose of this invention, because the force generated varies in accordance with the velocity. Under varyin conditions more or less force is enerate withinthe flue, due to the upwar assage of the heated fiuids and, therefore, a amper to meet these varying conditions should be so made that it may be readily adjusted and yet be simpleof construction. I attainthese objects by the mechanisms illustrated in the accompanying drawings, in which-y Figure 1 is the side elevation of the pipe or flue, parts being broken away to show the damper in place. The full lines in Fig. 1

Vshow the damper in normal inoperative position while t e dotted lines show the two blades partially extended, thus lessenmg the effective area of the iiue for the passage of 'the gases and, therefore', the draft upon the furnace. Fiv. 2 is a vertical sectional view of the flue tilren at right an les to the v1ew vof Fig. 1, and showing the amper and operating devices in side elevation. Fig. 3 is a 1. is a joint of the flue above the place of the lnsertion of the damper.

sept. 2o, 1910.

2 is thejoint below while 3 isa sleeve into which the damper is placed, passing through 1t on opposite sides.

It will be understood that the tlue joints and sleeve 3 will be of any suitable construct1on and cross sectional form, but this invention is designed especially for application to ordinary domestic stove plpes. l The damper mechanism below described, will preferably be assembled in place in the sleeve 3 at the factory, and thus placed on the market as a complete article of manufacture, ready to be inserted betweenany two stove ipe joints as indicated, by any per` son w ether skil ed or unskilled.

It is to be understood that while a sleeve is shown .as bearing the other portions of the damper the sleeve as a separate element is not absolptely required, since the damper blades and the coperating part-s may be fitted to an ordinary stove pi e or flue, especially when the devices are eing made in connection with the Hue pipes at the factory. It is to be understood in this connection that applicant does not desire to be limited to a construction in which a sleeve as a separate element is employed.

Parts 1 and 2 do not touch each other;.the'

space between them being somewhat greater than the rolled art whlch forms the support or axis of t 1e damper blade.

4. is one damper blade which in form sublstantially conforms to the' form of the in-y ner wall of the flue. 5 is the other damper blade. The two, when extended into a hori Zontal plane, completely sto the assage of the gases. Tooperate bla e 4 t ere 1s an arm 6 and to operate blade 5 there is an arm 7, both of which are parts of blades 4 and 5.

8 are small circular holes in arms 6 and 7 which are for the purpose of allowing coni necting links 9 and 10 to be engaged therein.

11 is a counter weight. As the conditions vary, duerto a strong wind-or change in atmospheric conditions, more or less weight is rooI required to operate the dam er successfully. i This is attained b 'variab y inserting the connecting links w ich support the counter weight in these various openings.

When the damper blade has been formed from the blank into the finished blade there los will be formed bearings 16 and 17 for cny l. In an automatic damper, a pair of damper blades.

' BEST VILBLE COPY gageinent `with the sleeve, and at any snitable points there may be provided thrust lugs to prevent endwise movement of the saine, suoli being shown herein as comprising a lug l?) to engage 'the inner Wall of the lue and a cooperating lug l2 to engage the outer Wall of the sleeve, thus holding the blade in position in the sleeve when once it is placed therein and made secure, as indicated. To ,keep 'them from passing through more than ninety degrees, two arins le and l5 come in Contact with each other. The damper blades being stainped from sheet metal, the stop arms l-t andl vare iexible, whereby they may be readily bent toward and from each other 'to vary the degree of angular movement which they will permit the blades to make, according to various re. quireinents.

operating levers connected to said blades and extending above. the axes i thereof in directions opiiosite freni the direc tions in which the blades extend, and a counterweiq'ht Connected to both of said lee vers to govern the rotation of the blades on their axes. e i

2, ln an automatic damper, a plurality of damper blades, operating' levers Connected tov said blades and elitending i'roni the axes tiieriot in d' notions opposite from the direo--- tions in which the biideseatend, and adjustable stop arms to vana-ably limit the tentoi angular movement of the blades.

ln an :internati-e damper, the eombins.-

vtion. of a sleeve, a pair oi" damper blades' erases jonrnaled for rotation therein on parallel axes, a lever connected to each blade and projecting abovev its axis, a stop' arm likewise connected to` each blade, each blade and its lever and stop arm beingv formed from a single blank, and a. Weight adjustably cone nested to both of said levers to counterbalance the eifeetive Weight of the blades throughout Jeheir movements.

41A. ln an automatic damper, the combina tion of a sleeve, damper blades journaled therein, operating levers connected to said blades and extending above the axes thereof in directions opposite from the directions in which the blades extend, thrust means connected to the blades to prevent movement thereof endwise of their axes, links eenneeted pivotally to said levers, and a weight suspended ,from both of the links.

5. lin an automatic damper, a pair of damper blades, operating levers connected to said blades and extending therefrom in opposite directions, and counterbalaneing means connected to said levers, such counterbalaneing means being capable of adjust nient. lo permit free movement of said blades upon a slight varianionv in the force ef the draft passing through the'sleeve.

ln testimony that l elaiin the foregoing as iny own, l have hereto ailixed my signature in the presenee nii two Witnessesthis l day of Sept. H908.' i i ARTHUR. SV. ARlslOLl).

ilitn ess-es A. L. MILLER, lif; A. Granneman.-

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