US1088379A - Feeding mechanism for furnaces. - Google Patents

Description

J. 'TBDELL PEBDING MBHANISM FOR FURNAGBS. APPLICATION FILED JUNE 3, 1912.

1,088,379. Patented Feb. 24,1914..

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J. TEDELL. FEEDING MBCHANISM FOR PURNAGES.

APPLICATION FILED JUNE 3, 1912. 1,088,379.

Patented Feb. 24,1914,-

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J. TEDELL. FEEDING MBGHANISM FOR. PU-RNAGES.

APPLICATION FILED JUNE 3, 1912.

Patented Feb.24,1914.

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By y L 't Hilfs/5T J. TEDELL. FBEDING MECHANISM FOR FURNAGES.

APPLICATION FILED JUNE a, 1912.

Patented 11111.24', 1914N 4 SHEBTSBHEET 4.

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JOI-IN TEDELL, OF ROCK ISLAND, ILLINOIS, ASSIGNOR TO ROCK ISLAND `PLOW COMPANY, OF ROCK ISLAND, ILLINOIS,A CORPORATION 0F ILLINOIS.

FEEDING MEGHANISM FOB FU'BNACES.

Specication of Letters Patent.

Patented Feb. 24, 1914.

application led J une 3, 1912. Serial No. 701,224.

' specification.

My invention relates to a continuous feed for furnaces, and relates more particularly to means whereby bars may be fed step by step through a furnace at the will of the operator.

I My invention relates more particularly to a furnace for heating metal bars preparatory to forging, and has been designed with particular reference to treatment of plow beams whereby they are properly heated before' being subjected to'a bulldozer'for bending them into proper shape.

These and other objects of my invention will be more clearly understood by reference to the accompanying drawings, in which similar reference characters refer to similar parts,'and in which- Figure 1 is a front viewv of a furnace comprising my invention. Fig. 2 is a sectional view taken on line 2-2 of Fig. 1. Fig. 3 is a side elevation. Fig. 4 is a plan view. Figs. 5 and 6 are detail views. 'Fig 7 is a sectional View taken on line 7-7 of Fig. 5.

As illustrated, I have shown a furnace comprising a heating chamber consisting of an upper section 11, end walls 12 and 13, and side walls 14,' 14. The end walls terminate a short distance above the work support 16, which extends through the furnace and for a distance to the rear thereof, so as to provide suitable space for feeding the bars onto this support. In -order to facilitate this feeding operation the rear end of this work support is inclined upwardly, so that the bars can be placed upon this inclined portion and fed by gravity onto the horizontal portion in a manner to be hereinafter more fully described. Situated below this work support there is a cradle 17 which is adapted to be raised and lowered in order to advance the bars step byv step along the work support. This cradle comprises a pair of longitudinally extending supporting bars 41-42 which are U-shaped in cross-section, .as

shown in Fig. 7, so that they fit over the frame bars 4,3, which frame bars are connected at their opposite ends by the tie rods 14. Near their opposite ends these support-v ing bars are provided with downwardly extending projections 18 and 20, while extending downwardly from the frame bars are a corresponding pair of supporting arms 115, 46, which arms are connected at their lower ends to the crank arm .19. Rigidly connected to these supporting arms at a distance slightly below the cradle, there are a pair of longitudinally extending braces 39 supported by means of ythe angular braces 40. Adapted to slide upon each of these longitudinal braces 39 there are apair of slotted wedges the shape of which being clearly shown in Fig. 6. Each pair of these wedges is connected together by means of a turn.

buckle 38," and the inclined faces ,iT-4.8 of

these wedges are adapted to bear beneath the lower edge of the downwardly extending portions 1S and 19 of the cradle, which extensions are oppositely beveled. The supporting arms i5- 46 pass through the slot within these wedges, while' a pair of pins 49 and 50 are provided upon opposite sides of the `frame bars 43 to prevent the cradle from having any longitudinal movement .upon

this frame. By this construction it will be seen that by moving the wedges by means 0f the turnbuckle the top of the cradle can be raised or lowered with respect to the frame,

and therefore with respect' to the feed support 16. It will also benoticed that I provide a turnbuckle and pair of wedges upon each side of this cradle, so that the opposite sides can be adjusted independently for a purpose which will be more fully pointed out hereinafter.

The opposite vends of the crank and 21 are connected to the transversely extending shafts 22 and 23. Upon the end 'of each of these shafts there is a bevel gear 24 which meshes with the corresponding gear 25 located upon the longitudinally extending shaft 26. Power is supplied to this shaft by means of the motor 27 which operates through the medium of a worm gear 28, and is controlled by means ofthe clutch 29 operated by the controlling lever 30. A pair of upright supports 31--32 are provided beneath thiscradle, and upon the upper 'part' of the support 21 is pivoted the arm 33 which is provided with a hook-shaped end portion 3 4 adapted to grip beneath the transverse shaft 22. Uponthe opposite end of this arm 33 there is a counterweight 35. A

arms 19 lio similar pivoted arm ,and counterweight is mounted on the upper portion of the stand- -ard 32, and coperates with the transverse shaft, 33. These counterweights are so adju tedl ,that they counterbalance the weight f l.he cradle 17 so as to lessen the amount of power required. to operate the same.

Upon opposite ends of the heat/fing chamber l provide sliding doors 51 and 52 which can be raised by means of the/'levers 53 54, the weight of these doors being counterbalanced by the counterweights 55 and 56. These doors provide...means for closing the ends of the heating chamber in order to enable the same to become initially heated more rapidly, but in the operation of the devicethey are raised 'a suiicient distance to permit the work to travel through the heating chamber unimpeded. Any suitable means may be employed for 'heating this chamber, but I have shown gas-burners 57 j and 58 which are supplied by means of the air and gas pipes '59-l-60, allof well known` construction.

. Having now described the construction of my furnace I will now proceed to describe its operation. f

The burners are first lighted, and then in order to more rapidly heat the heating chamber the doors 51 and 52 are first lowered, sov as to close the openings in the opposite endofthe heating chamber. When this chamber has become sufficiently heated, the doors are raised slightly to permitthe work to pass` through and likewise'to permit.V the escape of the gases of combustion through these I openings. vThe bars to be vheated are then fed upon the rear longitudinal and inclined portions of the work 16 and the handle 30 then operated to throw in the. clutch 29,

',-whereby the power is appliedtoraise and' lower the cradle 17 by means of the connections heretofore described. The cradlel is @adjusted by means of the turnbuckles, so

that in its raised position'th cradle projects slightly above the work support, .so that it picks up the bars placed upon thls support and carriestheln forward a short distance,

as is clearly shown in dotted lines in Fig. 5. vOn account of the rotary movement of the vcrank arms 19 and 20, each point'upon the upper surface of this cradle has a similar u rotary' movement, so that as -this crad'le comes in contact withthe bars or beams onl `the work support these beams are raised ,slightly and carried 'forward a short dis tance. By means of the adjustment whereby this cradle can bera-ised or lowered with respect to the crank arm, the distance which this cradle rises above the work support can be readily determinedl It is preferably so adjusted that in veach 'revolution of the 'crankl arm the beams upon the work support are carried forward the-thickness of a single beam, I4`.urthermore, v.by having both sidesA Iof. the work support adjustable independy chamber so that this heating chamber is substantially filled, the clutch can then be thrown out in order to allow sufiicient time for these bars to become properly heated. After this has been accomplished and when `the perator wishes to take a beam orv bar out of the furnace, he merely throws in the 4clutch to allow the cradle to be raised and lowered a single time, whereby the bars are all pushed forward so that a bar is forced out onto the extension 61, from which place yitcan be readilygripped by suitable tongs or the like and carried to a forgeor bulldozer to be bent into the required shape. When he wishesI another beam, he has but to throw in his clutch and another beam is brought out upon the extension 61. While .this machine is in operation the beams are simply fed upon the inclined portion of the support 16,l .and as the beams upon the horizontal por- .tion are carried forward, the force of gravity is suiicient to carry these beams down` the inclined portion onto the horizontal portion where they are adapted to be engagedA by the cradle.

It will thus be seen that I have devised a very simpleand elicient means for continuously feeding bars or beams through a furnace, and in which it is simply necessary to place the beams upon this inclined portion of the work support and thereafter the feeding is entirely'auto'matic.

While I have shown one specific-embodi- I ment of my invention, it willjbe understood that many modifications and equivalents will readily suggest themselves to anyone cradle Iabove said work support, said cradle having a combined upward and forward movement, whereby the material to be treated is raised from said support and moved forward by said cradle. l

2. In a furnace, a .feeding mechanism, a work support, a cradle mounted 'below said support, and adapted to be raised above said means for adjusting the position of said cradle withrespect yto Vsaid support.

3. In a furnace, a feeding Imechanism. a

vsupport anduto be moved-"forwardly for v --movin'gsaidlx'naterial along -the same, andA 110 skilled in the art, and I therefore do not i work support, a cradle mounted below said support, and adapted to be raised above said support and to be moved forwardly for moving said material along the same, and means for independently adjusting the opposite sides of said cradle with respect to said support, whereby the material is fed evenlv along said support.

4. ln a furnace, a Work support, a frame mounted below said support, a cradle adjnstnbly mounted upon said frame, a crank arm for oscillatino said frame and cradle, whereby said crad e has an upward and forward movement, whereby the movement of said cradle causes the work to be treated 0 be moved along said work support step f ste D5. Iii a furnace, a feeding mechanism comrising a work support, a frame mounted lielow said support, a cradle mounted upon said frame, a pair of wedges for sup orting said cradle whereby it may be a Justthe Sallie forward, and counterweights associated with said cradle, so as to counterbalance the weight of the same.

Signed by me at Rock Island, Illinois, this 29th day of May 1912.

JOHN TEDELL.

Witnesses:

C. E. Sr-mnrn, GEO. H. SHnLnoN.

Copies of this patent muy be obtained for nve cents each, by addressing the Commissioner of Patents, Washington, D. O.

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