US723372A - Damper. - Google Patents

Description

No. 723,372 1 v PATENTED MAR. 24, 1903.. 0.,A. DUNE-AR.

DAMPER.

APPLICATION FILED AUG. 12, 1902.

.NO MODEL. 4 SHEETS-SHEET 1- WITNESSES: lNVENTOR 44a Uharlas :UunBar ATTORNEY PATENTED MAR. 24;, 1903.

0. A. DUNBAR.

DAMPER. APPLIGATIUN FILED AUG. 12, 1902.

4 SHEETSSHEET 2.

H0 MODEL.

INVENTOR WITNESSES:

qw g vm am-Lu (Mf No. 723,372. PATBNTED MAR. 24, 1903.

- C. DUNBAR.

DAMPER.

APPLICATION FILED AUG. 12, 1902.

.NO MODEL. 4 SHEETS-SHEET a.

WITNESSES: INVENTOR'. & Char]. as almun baz' 36 BY ONLLQ. 6' H 154mm cf/ ATTORNE No. 723,372. PATENTED MAR. 24, 1903. C. A. DUNBAR.

DAMPER.

APPLICATION 'IiLED' AUG. 12, 1902.

N0 MODEL. 4 SHEETS-SHEET 4.

WITNESSES: *mvEN Tm n ljha rlagajjun bar UNITED STATES P TENT OFFICE.

CHARLES A. DUNBAR, OF NEWARK, NEW'JERSEY.

DA-M PER.

srncmzcmnon forming peace Letters Patent No. 723.372, elated March 24,1903.

Application filed August 1 2, 19oz,

T0 at whom it may concern:

Be it known that I, CHARLES A. DUNBAR, a citizen of the United States, residin g at Newark, in the county of Essex and State of New will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw ings, and to numerals of reference marked thereon, which form apart of this specification. V

The present-invention relates to improvements in dampers for furnaces; andthe invention has reference more particularly to a novel arrangement and construction of the parts of a damper-arranged in the smoke pipe or flue which is connected with the furnace with a View of providing a proper consumption of the gases which sometimes lodge and collect in the flue or pipe, especially when the damper is partly closed to check the draft;

furthermore, to provide in connection with a damper construction of the character tobe hereinafter fully set forth an indirect draft for a passage or flow of air into the smoke-flue when there is an excessive draft upon the chimney during high winds, to prevent a direct draft upon the body of fire in the furnace when the said fire is to be checked, especially during the night, and to prevent the said body of fire from burning outbefore morning. V

My present invention has, therefore, for-its principal objects to provide a novel construction of damper and check for furnaces which shall be of a cheap and very simple construction, shall be very effective in its operation, and in which the means for admitting the outside air into the damper-casing directly back of the damper in said casing for the consumption of the gases to prevent an explosion or back draft in the furnace is controlled and regulated by the same movement of the handle or lever for operating and setting the.

damper.

The invention has for its further object to provide,'iu connection with a damper of the character just set forth, a novel means for drawingtheoutsideairdirectlyintothesmoke- Serial No- 119,371. on modeld pipe in front of the damper when the latter is partly or entirely closed or set for checking theiire in the furnace, and thereby providing an indir'ect draft into and through the smokeflue when there is an excessive draft or suction upon the chimney to which the smokeline of the furnace leads, as during high winds and storms, but when a full draft is Wanted the damper in the casing being of such arrangement that it will entirely close the opening leadingfrom the gate-valve-controlled opening of that portion of the device through which the outside air flows when such indirect draft is desired.

Other objects of this invention not at this time more particularly mentioned will be clearly evident from the following detailed description of my invention.

My iuvention'therefore consists in the novel construction of damper and check for the flues of furnaces; .andffurthermore, this invention consists in the various novel arrangements and combinations of parts, all of which will be more particularly set forth in the 'following specification and then finally embodied in the clauses of the claim which are appended to and form a part of this specification.

The invention is clearly illustrated in the accompanying drawings, in which- Figure l is aside elevation, and Fig. 2isa longitudinal vertical section, of a damper or check for smoke-fl'ues embodying the principles of the present invention, the damper plate or disk being represe'nted'in its closed position in the damper-casing. Fig. 3 is a side elevation, and Fig. 4 is a longitudinal vertical section, of the damper or check represented in said Figs. 1 and 2, but illustrating the damperplate or disk in thedamper-casing in its opened position to permit a direct draft through the device and preventing an indirect draft'therethrough. Figs. 5 and 6 are the two end views of the damper or check. Fig. 7 is a horizontal section of the same, said section being taken on line 7 7 in said Fig. 2.

Fig. 8 is a vertical cross-section taken on line 8 8 in said Fig. l, and Fig. 9 is a vertical cross-section taken on line 9 9 in said Fig. 1. Fig. 10 is a side elevation of the device, similar to that represented in Fig. 1, but a portion of the damper-casing being broken away.

Fig. 11 is a side elevation, and Fig. 12 a longitudinal vertical section, of a modified arrangement of the gate-valvefor the indirect draft through the damper-casing when the latter is to-be arranged in a vertical position in the smoke-flue of the furnace.

Similar characters of reference are employed in all of the said hereinaoove-described views to indicate corresponding parts.

Referring now to the said drawings, the reference character 1 indicates the complete casing in which the damper is arranged. This casing comprises a main body portion 2, of a cylindrical cross-section, provided with the inlet 3 and the outlet4 for arranging and securing the said casing in the furnace-flue or smoke-pipe in any well-known manner, as will be clearly understood. Connected with the lower portion of said main body 2 by means of a suitable opening 5 is a box 6, having the sides 7, a bottom 8, the upwardly-extending back 9, and the front 10, which is provided with an opening 11. The said front is also provided with a pair of perforated ears or lugs 12, in which there is a pin 13, carrying an oscillating door or gate 14. This gate or door 14 is hung, by means of perforated ears orlugs 15, in such manner from the said pin 13 that its lower edge is normally in close engagement with the inner edge of an upwardly-extending portion 16' of the said box 6, as clearly illustrated in Figs. 2 and 4 of the drawings. The said main body 2 is also provided near its inlet 3 and at that part of the opening 5 nearest the said inlet 3 with the cylindrical portion-17, with the walls or partitions 18 and 19, and a horizontally-disposed bottom 20, so as to form a duct or passage-way 21. The said bottom also extends rearwardly and is connected with a vertical wall or partition 22, which is secured at its ends to the inner surface of the said main body portion 2 directly above the'edge 23, as shown, to form a duct or passage-Way 24. This duct or passage-way 24 is covered by means of a plate 25, provided with any suitable number of holes or perforations 26, sub stantially as and for the purposes to be presently more fully set forth. tion is established between the duct or passage-way 21 and the duct or passage-way 24 by means of an opening 27 in the partition 19, as shown in Figs. 2 and 4. In one or both of the opposite sides 7 of the box 6 is a suitably -shaped opening or openings 28, which when open permit of a free circulation of fresh air into the duct or passageway 21 through the opening 27 in the partition 19, into the duct or passage-way 24, and .thence through the perforations 26 in the plate and also through the open spaces 29 at the top edges of said plate 25 (see Fig. 8) into the interior of the said main body portion 2, where said fresh air commingles with the gases coming from the furnace to produce combustion of the same, and therebypreventing aback draft or an explosion in the furnace A communicaby the collection ofsuch gases,as will be clearly evident. When a full draft is on the fire in the furnace, the opening 5 between the interior of the said main body portion 2 and the box 6 is closed by means of a suitably-com structed damper or plate 30, preferably made scoop-shaped, as shown, so as to more properly close the said opening 5. This damper or plate 30 is suitably secured along its edges 31 to a spindle or rod 32, jonrnaled in suitable hearings in the opposite sides 7 of the box 6, and its ends extend beyond the said sides, as shown. Suitably connected with and secured upon one or both of the said projecting ends of the said spindle or rod 32 are one or two arms 33, each arm having at its free end the disk-shapedand flat member 34. Upon one or both of the said projecting ends of the said spindle or rod 32 may also besuitably secured a lever or handle 35 for setting the damper or plate at any desired degree of inclination within the main body portion 2. The lower end portion of the said lever or handle 35 is in slidable and frictional engagement with a suitable guard 36 at the side of the box, the same being preferably provided with the words Shut and Open. This frictional engagement between these parts allows of the setting of the damper or plate 30 at any angle, and at which angle the said damper or plate will be held until moved into another position by the manipulation of the said handle or lever 35.

From an inspection of Figs. 3 and 4 it will be. clearly evident that when the damper or plate 30 has been set in its entirely-open position for a full draft the rotary movement of the spindle or rod 32 will have moved the arm or arms 33 and the flat member or members 34 directly over the opening or openings 28 in the side or' sides 7 of the box 6, thereby entirely closing the said openings. When, however, the said damper or plate 30 has been set at, any intermediate position between Shutand OpenordirectlyuponOpen, then the said arms .33 and members 34 will be in the positions that said members 34 are not directly over the opening or openings 28, thereby leaving the opening or openings 28 open for a free circulation of air into the ducts or passage- ways 21 and 24 and the interior of the main body portion 2 directly above the perforated plate 25, as hereinabove set forth, and for the proper consumption of the gases from the furnace that might otherwise collect in front of the damper or plate 30 and perhaps cause an explosion in the furnace.

The purpose of the oscillating door or gate 14, previously mentioned, is as follows: It often happens that during the night when the damper or plate 30 is partially closed to check the fire in the furnace a high wind causes a suction in the chimney-flue with which the smoke-pipe of the furnaceis connected, whereby too great a draft upon the fire is produced, and hence there will be too great a consumption of coal during the night,

rangement of the box 6, connected with the interior of the main body portion 2, by producing an indirect draft directly through the interior of the said box 6 and through the opening 5 into the interior of the main body portion 2, as will be clearly understood from an inspection of Fig. 2, without in the least having any efiect upon the checked fire in the The said gate or door 14 is made of furnace. such light metal, as copper or aluminium, that it readily oscillates or vibrates with the changes of the wind, causing a suction of air t'hroughthes'e parts of the device and the chimney-flue.

In some instances it may be necessary to arrange the damper device in a verticallyplaced smoke-flue. In that case the device is set as indicated in Figs. 11 and 12 of the drawings, and a gate or door 37 is pivotally arranged behind an opening 39 inthe vertical side 38 of the box 6, as illustrated. The

remaining parts of the device are arranged.

and act as hereinabove described, and no further description of these parts is therefore necessary.

From the hereinabove description of my damper and checking device for furnaces it will be clearly evident that I have provided a simply-constructed and an efliciently-oper--. 'ating attachment which can be readily connected up in any flue or smoke-pipe of a furmace, and the various parts of the device all being made either of cast metal in one piece or of sheet metal they can be readily connected by being soldered together in the usual and well-known manner.

I am aware that changes may be made in the various arrangements and combinations of the parts, as well as in the details of the construction thereof, without departing from the scope of my present invention. Hence I do not limit my invention to the exact arrangements and combinations of the various parts as described in the previous specification, and as illustrated in the corresponding drawings, nor do I confine myself to thedetails of the construction of any of the parts thereof.

Having thus described my invention, what I claim is- 1. In a damper, the combination, with a main body provided with an opening in its side, anda damper-plate jo'urnaled near one edge of said opening and arranged to open into the main body, and mechanism cooperating with and moving in unison with the damper-plate to close said means of ingress when the damper-plate is open and to open said means of ingress when the damper-plate is closed, substantiallyas and for the purposes set forth.

2. In a damper, the combination, with a main body provided with an opening in its side, and a damper-plate journaled near one edge of said opening and arranged to open and close said opening and simultaneously close and open the interior of said main body with a smoke-flue in which the damper is arranged, a box having an air-duct directly beneath the lower front end portion of the said main body and said box inclosing said open ing in the main body, said box being provided with a means of ingress for the passage of air into the interior of the said air-duct, a means of communi'cation'for the passage of the air from said air-duct into the interior of the said main body, a perforated plate arranged directly above the said means of communication, and mechanism cooperating with and moving in unison with the damper-plate to close said means of ingress to the air-duct when the damper-plate is open and to open said means of ingress when the damper-plate is closed, substantially as and for the purposes set forth.

3. In a damper, the combination, with a main body, and a damper-plate in said body for opening and closing the interior of said main body with a smoke-fine in which the damper is arranged, downwardly-extending partitions near the front end portion of said main body, a horizontal wall connecting the saiddownwardly-extending partitions, so as to provide a pair of air-ducts, one of said.

downwardly-extending partitions being provided with an opening to provide a means of communication for the air from one air-duct into the other air-duct and into the interior of the said main body, a means of ingress for the passage of the air from the outside into the air-duct nearest the front end of the said main body, and mechanism cooperating with and moving in unison with the damper-plate to close said means ofingress when the damper-plate is open and to open said means of ingress when the damper-plate is closed, substantially as and for the purposes set forth.

4. In a damper, the combination, with a main body and a damper-plate in said body for opening and closing the interior of said main body with a smoke-flue in which the damper is arranged, downwardly-extending partitions near the front end portion of said main body, a horizontal wall connecting the said downwardly-extending partitions, so as to'provide a pair of air-ducts, one of said downwardly-extending partitions being provided with an opening to provide a means of communication for the air from one air-duct into the other air-duct, a means of communi- 'rior of said main body, a perforated plate ar-;

moving in unison with the damper-plate to; close said means ofingress when the damperplate is open and to open said means of ingress when the damper-plate is closed, substantially as and for the purposes set forth.

5. In a damper, the combination, with a.

main body provided with an opening in its side, and a damper-plate journaled near one edge of said opening and arranged to openand close said opening and simultaneously close and open the interior of said main body with a smoke-flue in which the damper is arranged, a box having an air-duct directly beneath the lower front end portion of the said main body and said box inclosing said opening in the main body, said box being provided with a means of ingress for the passage of air into the interior of said air-duct and thence, into the main body, and mechanism cooperating with and moving in unison with the damper-plate to close said means of ingress when the damper-plate is open and to open said means of ingress when the damper-plate is closed, consisting, essentially, of a lever 35 on the end of the spindle to which the dam perplate is attached, an arm 33 also secured on said spindle, and a fiat disk-like member 34 on said arm 33, adapted to be,moved over the said means of ingress, substantially as and for the purposes set forth.

6. In a damper, the combination, with a main body and a damper-plate in said body for opening and closing the interior of said main body with a smoke-flue in which the damper is arranged, downwardly-extending partitions near the front end portions of said main body, a horizontal wall connecting the said downwardly-extending partitions, so as to provide a pair of air-ducts, one of said downwardly-extending partitions being provided with an opening to provide a means of communication for the air from one air-duct into the other air-duct, and into the interior of the said main body, a means of ingress for the passage of the air from the outside into the air-duct nearest the front end of the said main body, and mechanism cooperating with and moving in unison with'the damper-plate to close said means of ingress when the dam perplate is open, and to open said means of ingross when said damper-plate is closed, consisting essentially, of a lever 35 on the end of the spindle to which the damper-plate is attached, an arm 33 also secured on said spindie, and a flat disk-like member 34 on said arm 33, adapted to be moved over the said means of ingress, substantially as and for the purposes set forth.

7. In a damper, the combination, with a main body provided in its side with an opening forming a means of ingress for the air into the interior of said body, of a box connected with said main body, said box inclosing the-opening in said main body, a rod journaled inithe' opposite sides of said box, said box being provided with an opening 28 in its side, a damper-plate attached to said rod, an 7 arm secured on the free end of said rod and extending at a right angle along the side of the said box, and a flat disk-like member 34 on said rod 33 adapted to be moved over the opening in the side of the said box, substantially as and for the purposes set forth.

8. In a damper, the combination, with a main body provided in its side with an opening forming a means of ingress for the airinto the interior of said body, of a box connected with said main body, said box inolosing the opening in said main body, a rod journaled in the opposite sides of said box, said box being provided with an opening 28 in its side, a damper-plate attached to said rod, an arm 33 secured on the free end of said rod and extending at a right angle along the side of the said box, and a fiat disk-like'member 34 on said rod adapted to be moved over the opening in the side of the said box, and a lever 35 also secured on the free end of said rod, sub stantially as and for the purposes set forth.

9. A damper for furnaces, comprising a casing, consisting, essentially, of a main body portion 2, a damper-plate in said main body for opening and closing the interior of said main body, and a box 6 connected with said main body and having a means of communication between them, the said box being provided with an opening, an oscillating gate adapted to open and close said opening by an indirect draft, an air-duct arranged between the lower front end portion of the said main body and the upper part of the said box, a means of ingress in the side of said box for the passage of air into the interior of said airduct and thence into the main body portion, and mechanism cooperating with and moving in unison with the damper-plate to close said means of ingress when the damper-plate is open and open the said means of ingress when the damper-plate is closed, substantially as and for the purposes set forth.

10. A damper, for furnaces, comprising, a casing consisting, essentially, of a main body portion 2, a damper -plate in said body for opening and closing the interior of said main body, and a box 6 connected with said main body and having a means of communication between them, the said box being provided with an opening, an oscillating gate adapted to open and close said opening by an indirect draft,an air-duct arranged between the lower front end portion of the said main body and the upper part of said box, a means of ingress in the side of said box for the passage of air into the interior of said air-duct, a means of communication for the passage of the air from said air-duct into the interior of said main body, a perforated plate arranged directly above the said means of communication, and

mechanism cooperating with and moving in unison with the damper plate to close said means of ingress to the air-duct when the damper-plate is open and to open said means of ingress when the damper-plate is closed, substantially as and for the purposes set forth. I

11. A damper for furnaces, comprising, a casing, consisting, essentially, of a main body portion 2,a damper-plate in said body portion, and a box 6 connected with said main body portion and havinga means of communication between them, the said box being provided with an oscillating gate adapted to open and close said opening by an indirect draft, downwardly-extending partitions extending from near the front end portion of the said main body into the said box, a horizontal wall connecting the said downwardly-extending partitions, so as to provide a pair of air-ducts, one of said downwardly-extending partitions being provided with an opening to provide a means of communication for the air from one air-duct into the other air-duct and into the interior of the main bodyportion, a means of ingress for the passage of the air from the outside into the air-duct nearest the front end of the said main body portion,and mechanism cooperating with and moving in unison with the damperplate to close said means of ingress when the damper-plate is open and to open said means of ingress when the damper-plate is closed,substantially as and for the purposes set forth.

12. A damper for furnaces, comprising, a casing, consisting, essentially, of a main body portion 2,a damper-platein said body portion, and a box 6 connected with said main body portion and having a means of communication between them, the said box being provided with an opening, an oscillating gate adapted to open and close said opening by an indirect draft, downwardly-extending partitions extending from a point near the front end portion of the said main body into the said box, a horizontal wall connecting the said downwardly-extending partitions, so as to provide a pair of air-ducts, one of said downwardlyextending partitions being provided with an opening to provide a means of communication for the air from one air-duct into the other airduct, a means of communication from the latter air-duct into the interior of said main body portion, a perforated plate arranged directly above the said means of communication, a means of ingress for the passage of the air from the outside into the air-duct nearest the frontend of the said main body portion, and mechanism cooperating with and moving in unison with the damperplate,to close said means of ingress when the damper-plate is open and to open said means of ingress when the damper-plate is closed, substantially as and for the purposes set forth.

In testimony that I claim the invention set forth above I have hereunto set my hand this 8th day of August, 1902.

CHARLES A. DUNBAR.

Witnesses:

FREDK. C. FRAENTZEL, GEO. D. RICHARDS.

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