US177121A - Improvement in draft-regulators - Google Patents

Description

1. HAYES.

. DRAFT-REGULATOR. No .177,1Z1Y. Patented May 9,1876.

JUN/71!??? NJETERS PHOTO-LHNOGRAPMER. WASHINGTONv D C.

dent of the city of Philadelphia, in the Statepanying drawings, in whichpurpose of showing more clearly the peculiar;

hot the fire-draft valve will be .partially contractedor closed, and the ohim hey-draft damp- "NITED TATES PATENT l-Orrio ISAAC HAYES, OFPHILADELPHIA, PENNSYLVAJSIIA.

Specification forming part of LettersPatent No. 17%,12-1, datedMayQ, 1876 application filed .April 11, 1876.

vTo all whom itmay concern: I I Be it"known that 'I, ISAAC HAYES, a resi-' of'Pennsylvania, hai e invented a new and useful Improvement in Automatic Heat-Reg-f ulators for Hot-Air Furnaces, which .improvev ment is fully set forth in the following :speci-g ficatiOm reterence being bad to the acoonr;

Figure l 'is a perspective view of the exterior of the front, and one side of an ordinary? hot-air furnace, having .myinvention applied I thereto; and l igsi2 and 3 respective views? of the valve-plate and itscorrespondin g mouth f (of either of the three valves) detached, for the-E construction of the same. 1

My invention relates more especially to the heat-regulators for hot-air furnaces, for cer- I tain improvement in which Letters Patent of i the United States No. 128,485 were granted to me, dated July 2, .1872, the characteristic feature of my said improvement consisting inthe combination and arrangementof a fire-draft valve and a chimney-draft damper-valve, operated simultaneously, to regulate the degree of heat desired in the air of the air-heating? chamber of the furnace, by the expansionand contraction of thea'ir'in the air-heating cham-- ber upon an inclosed elastic diaphragm, connected with a weighted lever,so that when the air in the heatingchamber becomes too er partially or more fully opened, and vice versa, when the air in the air-heating chamber has become too cool, thusautomatically keeping the temperature of the required heatedair nearly uniform.

There is a defect, however, in the abovedescribed automatic heat-regulator, in that there is not any provision for regulating the supply of fresh air into the heating-chamber, which is a defectthe removal of which is of very considerable importance-because, in such case the supply of the fresh cold air to the air-heating chamber is nearly invariable in quantity, while the heat generated by the combustion of the fuel in the fire-box or cylinder is Variable, and consequently when the fire is low or weak the said fresh-air current mouth of the inlet for the fresh air which is.

to be warmed, of an automaticallyactuated valve, arranged to work as .will hereinafter be described.

Another object of mysaid present improvement relates to the peculiar structure-of the. several valves, especially as to the mode of connecting the plate with the seat, whereby they will operate together with more accuracy and ease, and cost less in construction .and

application.

Referring to Fig. l, A is thefurnace; :B, the firedraft valve; 0, the fresh cold .air draft valve; D, the chimney-damper'val-ve; vE, the .case,containing the usual elastic diaphragm (not shown) communicating withthe'aieheating chamber in the furnace A, and with the Icooling=cylinderiF on the outside of the said furnace A, by means of the tubes or pipes f f; G, the rigid stem fixed to the diaphragnr in E, and connected to the rock-shaft g, the

.outer end of which .carries the adjustablyweighted lever H, and theinner projecting end carries the lever I, and the right-hand arm of which latter is connected by a chain or wire, 0, to the .plate of valve 0, and the op- .posite arm in the same vmanner to the plate of the fire-draft valve B, and also to the plate of the chimney-damper valve D above, by means of the turn-buckles K K, and the connectingwires or chains 3 4 5, substantially as represented in the drawing, Fig. 1. The-connections between the valves BO D are adjustably attached together and to the horizontallyarranged lever I of the rock-shaft g,.which carries the adjustably weighted lever H, so as to operate together,substantially as will now be described and explained, in regulating the temperature of the air passing through the air-heating chamber of the furnace.

When the furnace is working under an ordinarily-good fire the plate of the fire-draft valve'B will be held nearly in a horizontal position, or not quite fully opened, the plate of the fresh cold air valve 0 partially opened, and the plate of the damper-valve D closed,

down nearly air-tight, as shown in Fig. .1; but if the fire become stronger, and consequently the airpassing through the air-heating chamber raised in temperature, the diaphragm in the ca e E will be pressed downward, carrying with it the rigid bar G, which. is articulated tothe rock-shaft g, and consequently causes the left-hand arm of lever I to descend gradually, and thus allow the valveplate of B to sink by gravitation, and thus diminish accordingly the area of the fire-draft opening in the valve. At the same time the righthand arm of the lever I, rising, lifts gradually the lower end of theplate of valve 0, and allows a larger area of opening for the entrance of the cold fresh air into the airheating chamber, and thus further reduce the temperature of the air in the said chamber; and if the temperature be still too high, the

lever I becomes farther tilted downward, and

time the fire get too low, and the air too much reduced in temperature, the damper-valve D immediately closes, the opening between the plate and seat of the valve 0 reduced, and the opening in the valve B enlarged.

It will be seen thatif the connecting devices between the valves B O D be properly adjusted to cause the air passing through the air-heating chamber to be heated to the re quired degree of temperature by an ordinarily-good fire in the furnace, the same, or nearly the same, temperature of the air will be maintained automatically, notwithstanding any variations inthe strength of fire in the furnace.

It will also be seen that, if the fire should become extinguished, as sometimes will be "the case for want of fresh fuel, especially in the night, the valve 0 will become entirely closed, in consequenceof the wider opening of the valve B, and consequently the entrance of fresh cold air into the air-heating chamber ed alike, except as to size, substantially as represented in Fig. l.

Theseat of each valve is oval in the area of its opening or throat, and the oval is formed her.

by cutting 011' the cylindrical conduit-pipe at alignment with the shorter diameter of the oval, (see Fig. 2,) andthen the edgeof the h upper half of the oval turned inward, and the edge of the lower half turned outward, as represented by 7 and 8, respectively, thus producing two'flat bearings nearly in the plane 7 of ,the oval opening.

The plate of each valve is of sheet metal, and cut out so that one end,9, (seeFig. 3,) will accurately fit against the under side of the bearing 7 of Fig.2, and the other or heavier and larger end, 10, so that it will fit over on the bearing 8, and so cut out also as to leave twoprojections or ears,.ll11, at {its side edges, substantially as represented in Fig. 3. The two parts, Figs.2 and 3,-arethen adjusted together, with the end!) of theplate against the under side of the-plane 7, and the end 10 of said plate upon the upper side of 8,

and finally the ears 11 11 bent down overand slightly under the respective square-cut ends of the plane 8, which connecting parts will then serve as the axis of motion for the valveplate, and thus dispensewith'the use of arbors or journals for the purpose.

I claim as my invention I l. The combination, in an automatich'eat; regulator for air-heating furnaces, substantial- 1y as described, of the automatically actuated valve 0, with the moutlror entrance opening for the fresh cold air into the air-heatin g chain;

2. The combination, in an air-heatingfurnace, substantially as described, of the valve O with the valves B and D, all of the said valves being actuated, whenin use, by the variations of thetemperature of the airin the air-heating chamber of the furnace, andithe gravitating tendency of the lower ends ofthe respective valve-plates, as described.

3. The valves B G D, each consisting of the combination of the inclined oval seat, having the flat bearings 7 and 8, and the valve-plate 9 10, having the projecting ears 11 11,. the plate and seat being attached together,as desoribed and shown in Fig. 1. l

ISAAC HAYES.

Witnesses:

BENJ. MORISON, WM. H. MomsoN.

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