US27155A - G-bate foe furnaces - Google Patents

Description

UNTTED sTATEs PATENT oEEioE.

THOMAS E. PURCHASE, OF DANVILLE, PENNSYLVANIA.

GRATE FOR FURNACES.

Specification of Letters Patent No.

To all whom it may concern:

Be it known that I, THOMAS E. PURCHASE, of Danville, county of Montour, in the State of Pennsylvania, have invented a new and useful Improvement in Grrates for Furnaces; and l do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

My invention relates to certain improvements in the grates of puddling, or other furnaces, and has for its object the construction of the grate in such manner tha-t the lire in any particular locality may be dropped without affecting the rest.

Previous to my invention the grate of a furnace has been constructed with a series of comb-like grate bars interlocking each other and so arranged as to be capable of being turned to shake up the ire or let it drop through; but in this description of grate the whole body of fire must be affected simultaneously and no portion of the lire can be dropped without dropping the whole.

The nature of improvement consists in the combination of a series of comb like grates or grate bars so arranged as to be each capable of being oscillated on its axis independently of the others (as will be hereinafter fully described) in order that any desired part of the fire may be affected without aecting the rest.

ln the accompanying drawings forming part of this invention Figure 1 represents a front elevation of a puddling furnace in which is arranged one of my improved grates. Fig. 2 represents a vertical lateral section of the same. Fig. 3 represents a skeleton perspective of the grate bars and frame. Fig. 4 represents a plan of the same. Fig. 5 represents plan and end views of one of the double comb bars. Fig. 6 represents bottom and end views of one of the single or side bars. Fig- 7 represents a perspective viewof the same. Fig. 8 is a perspective of the turning key or wrench and Fig. 9 is a perspective view of one of the retaining caps.

The same parts are indicated in the different views by the same letters.

A is the body of the furnace B the air chamber, and C its door.

The double combs consist each of a bar D, which is hung at each end so as to turn 27,155, dated February 14, 1860.

freely on its axis and is formed with a series of radiating arms a, on opposite sides, each set of arms a., interlocking with those of the adjoining comb (see Fig. 4). The single or side combs (which are sometimes called hermaphrodite bars are formed of a oar E, similar to D, and similarly hung, but having only one set of arms l), and being forme-d with a stop plate e. The bars D and E, are all formed with squared ends to accommodate a key by which they are turned (as will be presently described).

,F are retaining keys which are hollowed out to fit over the squared ends of the bars D and E and are formed with a projecting feather f (see Fig. 9) which fits into a corresponding slot or spline in the front plate or door of the air chamber. By this formation and arrangement of retainer F, the bars D and E are held in the desired position. 5

G is the key for shifting or turning the grate bars and the form of which will be comprehended by reference to Fig. 8.

The operation of my improved grate,illus trated at Fig. 2, where it will be seen a part of them have been so turned as to discharge the cinder while the other portion still holds up the material and tire being worked; the bars are only capable of oscillating on their axes, after the retaining keys or collars F, have been extricated from their seats, so that when it is desired to drop the cinder they are collected at the most convenient part of the surface of the grate and separately from the material to be retained, when the retaining keys of those bars which sustain the cinder are removed and said bars by the turning key Gr are shifted to drop the cinder into the air chamber (as illustrated at Fig.

2) after which the said bars are turned back 95 to their normal position and locked by the replacing of the retaining keys F. lt will be seen that not only can a part of the lire be dropped without affecting the remainder which is a desideratum of vital importance in the puddling furnace, but also that any locality in the body of the tire may be agitated at pleasure which is a great desideratum in all kinds of furnaces, since it often happens that to economically manage the fire only certain parts should be agitated (or raked) at certain times.

I do not limit my invention to the employment of any particular number of comb grate bars, nor to the particular method of holding them in position. Neither do I Wish ently of the others substantially as specified to be understood as claiming broadly the for the purposes` set forth. 10 combination of comb-like grate bars; but In testimony whereof I have hereunto set What I claim as my invention and' desire I my' hand and axedjmy seal. I I 5 to secure by Letters Patent i- THOS. E. PURCHASE. [L.S. The combination of a series of comb-like Witnesses: v Y grate bars each interlocking the other and Y A. F. RUSSEL,

each capable of being oscillated independ- R. CATHCART.

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