US2092112A

US2092112A - Ash sifting device

Info

Publication number: US2092112A
Application number: US50793A
Authority: US
Inventors: Joseph G Fakult
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-11-20
Filing date: 1935-11-20
Publication date: 1937-09-07
Anticipated expiration: 1954-09-07

Description

Sept. 7,, 1937. J FAKULT 2,092,112

ASH SIFTING DEVICE Filed Nov. 20, 19:55

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ATTORNEY Patented Sept. 7, 1937 PATENT QFFICE UNITED STAT- S ,3 Claims.

This invention relates to an-ash-siftingand unburned-fuel 'dischargedevice forcoal stoves, furnaces and heaters-and theash-sifting device according to:the invention'is adapted to be disposed in-a furnace etc. under the grate bars thereof. As well known, ashes passing through the now commonly used rotatable or :shiftable grate bars of a furnace contain a high percentage of unburned fuel, as the grate bars are widely spaced to permit of-clinkers and other unburnable residue being crushed and discharged into the ash pit of the furnace; Thesifting of ashes in order to separate the unburned fuel therefrom is very inconvenient, dusty and. unwelcome, therefore furnace operatorsrather waste the unburned fuel than go to the inconvenience-of sifting the ashes.

It is .the primary object of this invention to provide a simple-and elficient ash-sifting and unburned fuel discharge device, whichzis adapted to be disposed and -operated'in 'a furnace so that all .dust and dirt will' be retained in thefurnacaand which is adapted to "forwardly discharge the sifted unburned ffuel "through i the ash doorof the "furnace into a discharge receptacle, extended .into theafurnace and-cooperating with "the 'ash sifter during discharge operations.

Another-objectof the invention is to provide an ash sifter of the above named character, which can readily and easily be mounted in a furnace Without any change of the stove structure and which is operated independently of the grates of the stove.

A further object of the invention is to provide an ash sifter of the above named character so constructed and mounted in the furnace below the grates thereof that all air entering through the ash door contacts with the sifting element and is preheated thereby in order to supply preheated air to the fire pot and effect a better combustion of the fuel.

With these and incidental objects in view, the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims; and a preferred form of embodiment of the invention is hereinafter shown with reference to the drawing accompanying and forming part of this specification.

In the drawing Figure 1 is a central vertical section through the lower part of a domestic furnace, having an ash sifter according to the invention mounted therein.

Figure 2 is a top plan view of the reciprocatory ash sifter member of the ash sifter shown in gu e 1.

Figure 3 is a perspective view of one of the suspension members of the ash sifter.

Figure 4 is a perspective'view of the ash sifter pan and V Figure 5 is a perspective view of the ash sifter 5 discharge receptacle cooperating with the ash sifter during discharge operations.

Referring to the drawing the reference numeral 2 designates a stove or furnace casing, which may be of any desired size, form and material, and, as usual, has in its lower portion. an ash pit 3, equipped with a horizontally hinged draft controlling door 4. This hinged door is part of a larger door 5, which, as customary, is hinged to the casing '2, so as to swing about a vertical axis l5 and exposea large part of the'ash pit-for cleaning purposes. The casing 2 is provided'with'bearings'fi and 1 in which are rotatably mounted grate bars 8, provided at their front ends with extension rods9, which rodsare adapted to be operated by a crank or operating member inserted through an opening in the door 5, all as presently practiced. The furnace casing supports the customary combustion chamber l0, arranged above the grate bars 8.

In accordance with the present invention an elongated sifting member I is suspended from the grate bars 8 by means of suspension elements l2. These elements embody a double hookshaped attachment portion 14, adapted to be hooked to the front or rear ends of 'grate bars 8, as indicated at l5 and I6, and a chain portion I1, I adapted to be hooked into and securely interlocked with the perforated bottom wall l8 of member ll, enlarged holes l9 being provided for this purpose. As shown, there are three suspension elements I 2, which provide a three point suspension for the member H and insure a free reciprocatory movement of member ll if so desired. The elements l2 are so secured to member 40 II that the two front elements l2 and the single rear element l2 converge toward each other. This arrangement effects a tilting of the member ll toward the rear, when same is shifted rearwardly and a tilting toward the front, when member H is shifted toward the front. The element H which is preferably made of perforated sheet metal or steel, the perforations being indicated at 20 and consisting of holes approximately one 5 eighth of an inch in diameter, is flanged as at 2| at its rear and the two sides. The front portion of the element H is narrowed to approxi mately one third of the width thereof to provide a narrowed portion 22, which portion permits of the sifted coal residue being readily discharged, as will be described hereinafter.

The portion 22 carries at its front end pivoted thereto a threaded operating member 23 adapted to swing in a horizontal plane, which member is bent at its outer end to form a loop 24, permitting the connection of a hook thereto if so desired. The body of member 23 carries nut members 25 which are threadedly engaged with said body and longitudinally adjustable thereon to permit of proper adjustment of the reciprocatory movement of member I I, as will be later described.

A flat ash pan 2'l seated on the base plate 28 a of the furnace receives the ashes which fall through the perforations 2B in member I I during sifting operations. This pan can readily be removed through the door 5.

During sifting operations the door 5 is in closed position and the door 4 is open, so that the member 23 can be extended through the opening covered by the door 4 for manually reciprocating the member I l during such sifting operations.

When the ashes on the member II have been thoroughly sifted, then a discharge receptacle 29 is inserted into the opening covered by the door 4, which receptacle embodies a box-like container 30 open at its front end and partly open at its This container is provided at its top and spaced from its front end with an angular cross piece 32, rigidly secured thereto and extending at opposite sides beyond the side walls 33 of the container 30. The cross piece 32 limits the inward movement of the discharge receptacle into the draft controlling opening covered by the door 4, furthermore. guides the member 23 during its reciprocatory movement and finally sto s the forward movement of the member I I during discharge operations. Thus the cross piece 32 is provided with a vertical narrow slot 34 permitting the member 23 to be extended therethrough and to be guided thereby, but limiting the longitudinal movement of said member and the member II, when the nut members 25 on member 23 engage the cross piece 32. When the forward movement of the member II is suddenly stopped, then the sifted residue of the ashes continues to travel on member I l and finally will be discharged into the container 30, keeping in mind, that the member II at the end of its forward stroke is forwardly tilted. A handle 35 on container 30 permits of proper handling of the discharge receptacle 29.

Having thus described my invention, what I claim is:

1. In a furnace having a grate and an ashpit below the grate, an ash sifting and coal residue discharge device comprising a perforated chutelike sifting member arranged within'the ash-pit of said furnace, converging suspending means for said sifting member adapted to effect tilting of said member when reciprocated, operating means attached to the front end of said sifting member for manually reciprocating same, and guiding means for said operating means co-operating therewith in limiting reciprocatory movements of said sifting member,

2. In a furnace having a grate and an ash-pit below the grate, an ash sifting and coal residue discharge device as described in claim 1, wherein the operating means for the sifting member embody means axially shiftably secured to said operating means adapted to co-operate with said guiding -means in stopping movement of said sifting member in a predetermined position.

3. In an ash sifting and coal residue discharge device for a furnace the combination of a perforated, flanged sifting member havinga chutelike extension at its discharge end, means suspending said member for reciprocatory movements, and operating means attached to the extension of said sifting member for manually shifting'same in opposite directions, with a coal residue receptacle extended into the furnace be- ,low the extension of said sifting member, said receptacle having means for guiding the operating means of said sifting member, and means on the operating'means of said sifting member cooperating with the guiding means of said receptacle in stopping the movement of said sifting member toward said receptacle when said sifting member is in a predetermined position to effect discharge of coal residue from said sifting member through its extension into said receptacle.

JOSEPH G. FAKULT.