USRE17973E - A cobpobation oe massachu - Google Patents

Description

C. D. MOSHER PLATE AIR HEATER 2 Sheets-Sheet; 1-

Feb. 17, 1931.

Original Filed Dec. 31, 1927 F b C. D. MOSHER e 1931' PLATE AIR HEATER 17973 2 Sheets-Sheet 2 Original Filed Dec. 31. 1927 Reissued Feb. 17, 1931 UNITED STATES PATENT: orerlce CHARLES 1). mosHnR, or HYDE PARK, MASSACHUSETTS, AssIGnoR T0 R. r. srUR'rE- VANT COMPANY, or BOSTON, MASSACHUSETTS, A CORPORATION or MASSACHU- SETTS PLATE AIR HEATER I Original No. 1,692,562, dated November 2 0, 1928', Serial No. 243,895, filed December 31, 1 927. Application for reissue filed June 12,1930. Serial No. 460,763.

This invention relates to air-heating structures utilizing waste heat from a boiler furnace or other source, to heat air for a useful purpose.

The structure in which the invention is embodied is of the plate type, and comprises a gas-conducting casing adapted-to receive hot gases at one end and discharge the same at the opposite end, and having large sideopenings at its upper and lower end portions, a

group of air chambers extending side by side lengthwise of the casing, each chainber'h'aving relatively wide side plates, united at their edges to form a thin air passage, oblong in cross section,'the chambers being provided at their end portions with ports registering with the casing openings, thearrangement being such that the casing is adapted to conduct hot gases upwardly between the cham' bers, while the chambers downwardly conduct air admitted to their upper ends through ports at the upper front ends of the chambers, heated air being discharged through ports at the lower forward or rear ends of the chambers.

The chief object of the invention is to provide an air-heating structure, the air chambers of which are adapted to be conveniently installed, with either end at the top, and rethe ports.

Another object is to provide an improved construction of the chambers at the ports thereof, whereby tapering throats are formed to facilitate the flow of air into the ports at the upper end portions of the chambers.

Other related objects will hereinafter ap! pear.

Of the accompanying drawings forming a part of this specification, Fig. 1 is a front elevation of an air heater embodying the invention; Fig. 2 is a longitudinal section on line A 22 'ofFig. 1; Fig. 3 is an enlargement-ofa portion of Fig. 2; Fig. 1 is a fragmentary section on line 4 l of Fig. 1; Fig.5 is a fragmentary section on line 55 of Fig. 1;' Fig.

6 is a perspective view, showing one of the clips hereinafter described; Fig. 7 is a perspective view of one of the'air chambers; Fig. 8 is a'section on line 88 of Fig. 7; Fig. 9 is a section on line 99 of Fig. 7 ;'F'ig. 10 is an enlarged fragmentary section on line 1010 of Fig. 1; Fig. 11 is a fragmentary section, showing two of the chambers; Fig.

12 shows in perspective portions of one of the chambers, and a portion of a filling men ber intended to be engaged with the cham bers, as shown in Fig. 7.

The same reference characters indicate the same parts in all of the figures.

12 designates a vertically elongated gasconducting casing, adapted to receive hot gases at its lower end, anddischarge the same at its upper end. A large rectangular upper opening 13 is formed in the upper end portion of the casing, and a lower opening 14, of

the'same size and form, is'formed in the lower end portion of the casing, the opening 13 admitting cool air to the upper ends of the chambers hereinafter. described, and the lower opening permitting the discharge of hot air from the lower ends of said chambers.

Within the casing is a group of air chambers extending side'by side lengthwise of the casing. Each chamber includes a pair of parallel rectangular plates 15, united at their edges, preferably by welding, to form a thin air passage, which is oblong in cross section. One longitudinal edgeof the chamber has at its upper end portion an air inlet port at 16, registering with the upper casing opening 13, and an air outlet port 17, at its lower end portion registering with the lower casing opening 14. J a.

The chambers are provided with filling members 18, a portion of one of which is shown separately by Figs. 11' and 12. Said members surround the-ports and are formed to collectively close the casing openings around the chambers, and space the chambers apart, as shown by Fig. 10, the joints of said members beingfmade up with plastic cement unafi'ectedby heat. r

I providemea'ns adapted to :detacha'bly cure the chambers to the casing, so that they may be detached, reversed end for end, and

again attached, the-form of the chambers and the-form and arrangement of the attaching formed for their reception in the casing, and provided with clamping nuts Fig. 3). In

this instance, the bolts 19 areengaged directly with ,the filling-members 18, :as best shown Figs. 3, '7 and .12. By the removal of the clam-ping nuts -20, which maybe done without disturbing the inlet'and outletconnections to the casing, and loosening the clamping abutment- 27, the chambers may be freed or released ;from .the casing so that they may be withdrawn from the back, the rear wall of the casing being pivoted as shown in]? 10 so that it may be opened (for this purpose.

Said-filling members are, inthis instance, provided with .slots .21, receiving ears or. wings 22, formed-on the outer edges of the I chambers and forming the-opposite sides of the air ports. Said wings are of the angular form shown by Figs. 8,10 and 11, and constitute diverging sides of throats 24- (Fig.

11), which facilitate theentranceofcool air into the upper ports of the chambers-and prevent the formation .of air eddies outside the ports. i Clio. extend .the throats 24, El provide angularcl-ips 25,, formed as shown in Figs. and 10, of sheet or plate meta-l, adapted to be sprung upon the angular ears 22, and con- ,nect theears-on adjacent air chambers. a The filling members 18 are abutted together; as shown by Figs. lOand 11, andare separable from each other. Said members form ;a .series filling the casing openings around the ,ports .of the air, chambers. zfine .endmemberofthe series contacts with a fixed abutment, 26, (Fig.4) on the casing. The opposite end member contacts Witha mocable clamping ahutmentQT (Fig.5. 5 and '1 which isadj ustable .to clamp :the filling .members together and confine the air chambers suitably spaced apart. a Thecasin vis.providedyv ithmeans for-ad jnstingthe a utme-nt27,preferably-embodied in .a slide 28, on which the abutment 2 7 is formed, said slide being movable 0n aguide 29,1fixedtothecasing and said slidebeing also provided with anear 30, receiving va rod The a o he rod :bears On th 'i.., he

. sidesapertie teit eea ee, 2; arenas engaged with a threaded portion of the rod bears on the ear 30. WVhen the nut is turned in one direction, it moves the slide 28 to press the abutment 27 inwardly, and cause its clamping action. The slide is guided by a -byFigs. 10 and 11.

To preventinward buckling of the plates 1,5, "farmin jthefsideS ofthe air chambers, I

secure to oneplat'e of each chamber, longitudinally extending angle strips 37, 7 bearing on .theopposite plate.

' "One plateofeach chamber -.may be provided' with external angle strips or lugs 38. adapted to bearon an adj acentchamber and maintain .the predetermined spacing between the chambers. ,O'ne wall ofthe casing maybe provided with V a spacing strip 39, having .notchesafllFig. {10) adapted to engage the vertical inneror rear edges ofthe air chamhere, said edges being preferably .Vshap.ed.

Gel-@1191? gases at one end anddischarge the same at the opposite end, and having side openings at its end portions, a group of air chambersextendlng sideby side lengthwise of the .casing, each chamber including a pair of parallel rectangular plates united at their edges to form a thin .air passage which is oblong in crosssection, one longitudinal edge of the chamber having at one end portionan air inlet port registering with one-of the easingopeningaand at itsopposite end. ,portion an airoutlet port registering with the other casing-opening, and attachingmeans adapted to detachably secure the chambers to the easing, the'fornrof the chambers and the attach-- ing means permitting the reversal of the .chambers end for .end, the chambers being provided with filling members surrounding theports and formedtocollectively close the casing openings around .the chambers and space .the chambers apart, the arrangement being such that the-casing is adapted to conduct hot gases in one direction between the chambers, while the chambersconduct air in the opposite-direction from. the inlet to the outlet port. i

,2. An air heater as specified byclaim 1, the

chamber attaching means being embodied in avingthus described the invention, what filling members being separately abuttedto- 113 gether edge to edge and forming a series filling the casing openings, one end member of the series contacting with a fixed abutment on the casing, the heater comprising also a movable clamping abutment bearing on the opposite end of the series, and means for adjusting said abutment to clamp the filling members together and confine the chambers in spaced apart relation.

4. An air heater as specified by claim 1, the abutting edges of the filling members being shouldered and interengaged to maintain the. members in alinement.

5. An air heater as specified by claim 1, the chambers being provided with diverging angular wings projecting therefrom at opposite sides of the ports and forming the sides of tapering throats communicating with the chambers, the wings of adjacent chambers being connected by angular clips sprung upon the angular wings and forming extensions of said throats.

6. In an air heater of the class described, a casing, a plurality of air chambers detachably secured within said casing'in a manner so that one or all of said chambers may be removed in their entirety or reversed upside down, and means for clamping said chambers together in spaced position.

7 An air heater having, in combination, a casing provided with symmetrically disposed inlet and outlet openings of equal size, a plurality of air chambers detachably secured within the casing, said chambers having symmetrically disposed inlet and outlet openings of equal size, and means for detachably securing the air chambers to the casing in spaced relation with the air chamber openings in register with the casing openings to permit the removal or reversal upside down of said entire chambers.

8. An air heater of the plate type, comprising a gas-conducting casing adapted to receive hot gases at one end and discharge the same at the opposite end, and having side openings at its end portions, a group of air chambers extending side by side lengthwise of the casing, each chamber including a pair of plates united at. their edges to form a thin air passage, one longitudinal edge of the chamber having at one end portion an air inlet port registering with one of the casing openings, and at its opposite end portion an air outlet port registering with the other casing opening, and attaching means adapted to detachably secure the chambers to the casing, the form of the chambers and the attaching means permitting the reversal of the chambers end for end.

9. In an air heater of the class described, a casing provided with symmetrically dis posed inlet and outlet openings and adapted to receive inlet and outlet connections, a plurality of air chambers detachably secured C within said casing and provided with inlet and outlet openings adapted to register with said openingsin the casing, and means for detachably securing the chambers in the casing so that one. or more of said chambers may .be removed in their entirety and reversed with respect tothe inlet and outlet openings without disturbing the inlet a-nd outlet con nections on the casing.

10. An air heater of the plate type comprising a casing providedwith gas receiving and gas discharge openings and having air inlet and air outlet openings, a group of air chambers extending side by side in the casing, each chamber including closely spaced side plates. united at their edges to form a. thin air passage and provided with edge ports for the inlet and discharge of the air, the ports registering with the air openings in the casing, filling members on the sides of the chambers adjacent the ports for spacing the chambers apart and preventing leakage between the chambers, and means for securing the chambers in position in the casing.

11. An air heater of the plate type comprising a gas conducting casing provided with receiving and gas discharge openings and having air inlet and air outlet openings, a group of air chambers extending side by side in the casing, each chamber including a pair .8 I oi parallel, rectangular plates united at their ed 'es to form a thln air assa e whlch is oblong in cross-section, each chamber being the chambers apart, the arrangement being such that the casing is adapted to conduct hot gases between the chambers, while the chambers conduct air from the inlet to the outlet ports. y

In testimony whereof I have signed my name to this specification.

CHARLES D. MOSHER.

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