US1310846A - smythe - Google Patents

Description

H. E. SIVIYTHE'.

coNTmuous FuRNAcE. l APPLICATION FILED IAN. 23. I9I9. 1,3102846, Patented July 22, 1919 -4 SHEETS-SHEET I.

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H. E. SMYTHE. CONTINUOUS FURNACE.

H. E. SMYTHE.

CONTINUOUS FURNACE. APPLICATION FIL ED JAN. 23| |919.

Patented July 22, 1919.

4 SHEETS-SHEET 3.

INVENTOH.

H. fyswfyHE. CONTINUOUS FURNACE.

APPLICATION FILED JAN- 23 I9I9 1,310,846. mentedJu1y2g1919- 4 SHEETS-'SHEET 4.

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JEn lsTATizs HORACE E. sMYTHE, OP PITTSBUBGHQPENNSYLVANTA, AssIGNOE. To THE s. n.. sMYTHE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF WEST VIRGINIA.

CONTINUOUS EUnNACE Specification of Letters Patent.

Patented July 22, 1919.

Application med January 2s, 1919. sei-181m. 272,646.

To ad lwhom t may concern.'

Be it known that I, HORACE E. SMYTHE, a citizen of the United States, residing at Pittsburgh, inthe county of Alleghen and Statel of Pennsylvania, have invente new and useful Improvements in Continuous Furnaces, of which the following is a speciication.

My invention relates to continuous heating furnaces, preferably heated by gas.4

One object of this invention is to provide a novel means for feeding metal articles, as

taken on the line I--I, Fig. 3; Fig.2, a

horizontal section on theline II-II, Flg. 1; Fig. 3 .is a vertical cross-sectionon the line IIL-III, Fig. 1; Fig. 4, a vertical crosssection on the line IV-IV, Fig. 1; and Fig. 5, a fragmentary view showing in vertical longitudinal section a ortionof a furnace embodying a modification of that shownin the'preceding views. A

The furnace has thehearth 1, the roof 2, the sides 3 and 4, the front end 5, and kthe back end 6. The back end has the charging door 7 and the front andthe discharging door 8, for the metal to be heated. The

front portion of the roof 2 is made double or hollow to provide the air flue 9, which has its forward end communicated by the inlets 10 with the front end of the furnace chamber 11. Air is fed to the flue 9 by one or more pipes 12 leading from a blower or the like 13.

14 is a gas-supply main connected to the chambers 15, the admission of gas to each chamber being controlled by a valve 16 (only one being show-n, Fig. 1) operated by a chainor rope 17, which asses over the sheave 18. A. pipe 19 leads rom each valve chamber 15 to a gas inlet 20 at each side 3 and 4, near `the front end 5 and the air inlets 10.

A short distance from the rear end of the furnace, for example, about one-fourth of the length of the hearth from the rear end, I `provide the openings 21, each connected by a flue 22 leading up to the pipe`23 which conveys the waste or spent gases to a stack, not shown.

The hearth 1 of the furnace is composed of a number of spaced stationary longitudinal sections 24 with a longitudinally and horizontally movable section 25- between ad- ]acent sections 24. The movable sections are -channeled above and lengthwise and supported on the metal pieces 26 arranged in. transverse rows below the hearth 1, each row being connected together by a crosssupport 27, having near each end a downward extending lug 28. The lugs 28 are arranged upon the traveling girders or bars 29, tied together by the cross-bars 30. The connected bars 29 are pivotally connected by the links 31 to the piston 32 of the hydraulic or other power cylinder 33.

Beneath the bars 29, ,I place a number of transversely arranged rock-shafts 34, each provided at each end with a short arm 34 which is connected to an adjacent cross-bar 27 by a link 36. The ends of the rock-shafts are Journaled in the bearings 37 supported on the pillars 38. The central portion of each shaft is provided with a downwardly extending arm' 39 pivoted to the horizontal bary 40. The rear end of the bar 40I is supported by the link 41 swinging on the pivot 42, and connected b the links 43 to the piston' 44 of the hy raulic or other power cylinder 45. The stationary sections 24 of the hearth are supported on the transverse girders or bars 46.

The commingling air and gas from the inlets- 10 and 20 vbegin to burn at the front end of the furnace-chamber 11 and flow rearwardly to the Outlets 21 and the stack flue 23, the air inthe Hue 9 being preheated by the roof 1 in a very economical andy eiiicient manner. In the form of my'invention shown on Figs. 1 to 4, the articles 47 are fed lengthwise so'as to lie in` the depressions between the stationary sections of the hearth and over the movable sections thereof. The

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varticles are fed step by step along the hearth as follows: Power is applied to the piston 44 to cause the bar 40 to'be moved to' the rear, which causes the movable sections of the hearth to rise so as to the articles 47 above they stationary sections of the hearth. Then the piston .32 of the cylinder tions, ready is actuated so as to move the bars 29 and the movable sections 25 toward the front 1o of the furnace; Then the piston 44 is moved, oli. allowed to move by the weight of the articles 47, to the right, the articles again restf upon the stationaryI sections of the hearth. Finally the pistonl 32 is moved back to the right, brin 'ng `the movable sections of the hearth bac to their rearmost posifor a new cycle-of operations.

I locate the outlets 2l a distance from the rear end of the furnace as aforesaid, in order to provide a relatively cool place of rest for the articles 47 where the molecules thereof ma return to'their normal positions and be -neath the hearth, where the operating mechanism for the members 25 is located. 50 is a door closing the rear end of the pit.

I clai1n 1. In a heating furnace, a hearth comprising parallel `stationary and movable members, the latter being arranged between the stationary members, upright and oscilla-table in' directicns parallel with the length of the' said members, means pivoted to the other end of 'the links for elevating the links so as to move the movable member above the stationa members, and means for causing the mova le member to travel longitudinally and the links to oscillate while they support the movable member in its elevated position.

2. In a heating furnace, a hearth comprising parallel stationary and movable members, the latter being arranged between the stationary members, upright links pivoted at one end to the movable member and oscillatable in directions parallel with thelength of the said members, shafts having arms pivoted to the other end of the links for elevating the links so as to move Vthe movable member above the stationary members, 'and means for causing the movable member to travel longitudinally and the links to oscillate While they support the movable member in its elevated position.

Signed at Pittsburgh; Pa., this 15th day of January, 1919.

- HORACE E. SMYTIJIE.v

links pivoted at one end to the movable member

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