US1182893A - Melting-furnace. - Google Patents

Description

A. W\ CARROLL,

MELTING FURNACE.

v APPLCATION FILED JULY7. 1915. 1,182,893. Patented May 16, 1916.

3 SHEETS-SHEET'I.

A/e xd nder WCar'ra// &thame-is A. W. CARROLL.

MELTING FU-RNACE.

APPLICATION FILED JULYT. e.

Patnted May 16, 1916.

3 SHEETS-SHEET 2.

A. W. CARROLL.

MELTING F URNACE. I-.PPLICATION FLED lULY?. 1915.

Paten ied May 16, 1916.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

ALEXANDER W. CARROLL, OF EI IZABETH, NEW JERSEY.

MELTING-FURNACE.

Application filed July 7, 1915.

To all 'whom it mag/ coccrn Be it known that I, ALEXANDER XV. Cim- ROLL, a citizen 'of the United States, and a resident of Elizabeth, Inion eounty, State ot' New Jersey` have invented certain new and useful Improvenents in Melting-Furnaces, of which the tollowingis a description.

My inrention relates to melting furnaces and particularly to 't'urnaces tor meltng metals such as brass.

So far as I am aware, there has, up to the present time. been no successful gas furnace built for nelting brass or similar netals. The fuel generaltv used tor this .purpose is coal, and the turnaces enp-loyed are usually ot' rather crude construction, including merely a suitable grate t'or supporting the fuel, and the necessary draft appliances. The eoal must be ca-refullv introduced into the furnace as it :torns the support for the pot containing the metal to be nielted. Since these pots come into direct contact with the burn-ing coal. they often become tractured, thus causing the loss, not only ot' the pot, but also of a considerable portion of the metal contained thcrein. Because of the above considerations, the operation of the nelting furnaces now in general use is at best slow and ineflicient.

An object' of my invention is to provide a melting furnace occupying approximately the same space as a coal t'urnace, but designed to use gas as a fuel, and so arranged that the pots containing the' metal are heated' evenly at all tractured. V

Another object of my inrention is to provide a turnace which shall require a COlllparatively slight amount of care in the operation thereof, and which may therefore be op'erated. more frequently and more etciently than the furnaces now in general use.

Another object of my invention is to provide means for introducing the combustible'.

points, without danger of being gases into the combustion chamber of the furnace in such a direction that they are given a whirling movement within the chamber and to so arrange the flueas to produce a down draft in the chamber.

Other objects of my invention Will a ppear more fully in the specification and claim which follow.

Referrng to the drawing, Figure 1 represents a plan View partially in section of a portion of a battery of fnrnaces embodymg Specfication of Letters Patent.

Patented May 16, 1916.

Serial No. 38,425. i

Referring to the drawing, 10 represents.

the combustion chamber of my improved furnace. This combustion ohanber is preferably divided into two concentric Compartments such as ll, 12 by a wall indicated at 13, which may be of any heat resisting material. This wall` as shown, does not ex'- tend to the top of the combustion chamber, but permits of communication between the two compartments ll, 12.

In the enbodiment of ny invention disclosed in Fig. l, I have shown the means for supporting the pot or container ll to comprise the cross-shaped nember 15 clearly shown in F ig. l, which provides communicating passages lG froni the inner compart- .lnent 11 into the fine 17. This fiue 17 extends longitudinally of the battery of furnaces beneath the several conbustion chambers and commnnicates with the stack 18 which is provided with a suitable' damper l9. This arrangenient of the fine, as is readily seen, produces a down draft in each of the combustion chambers.

Located within the flue 17 and running longitndinally thereof are the pipes or conduetors "20, 21 which in this case conduct gas and air respectively to a common conductor or conductors such as 22 which in turn communicate with the combustion chamber of each fnrnace. I preferably arrange these conductos 9 to enter the combustion chamberat an angle, so that the gases which are introduced into the combustion chamber are givcn a whirling movement. I pret'erably also use a plurality of these conductors 22, in order that the heat due to the combustion of the gases may be distributed as evenly as possible throughout the ehamber.. By passingthe conductors 20, 21, through the fine 17, the gases' carried by the conductors are eftectually heated before they are introduced into the combustion chambers.

In the embodi'nents shown. in Fig. 1, I have illustrated the' conductors 22 as comniunicat ingwith the onter compartment 12 of the combustion chanber, so that the combnstible gases which enter through the conduetors 92 into the combustion chamber, pass in a whirling movement through the wall 13 and down through the compartment ll into the fiue 17. By this arrangement, it p is apparent that while all the heat is maintained within the combustion chamber, the initial fiame of the burning gases, which is most detrimental to the pot, does not come in contact with the pot. It is apparent also that the burning gases are drawn down through the compartment 11 upon all sides of the pot, thereby heating it at all points equally.

I preferably provide each :Eurnace With a cover, such as shown at 23, whereby access may be had to the interior of the furnace when desired. I also preferably provide each furnace with a removable pan, such as indicated at 25, which fits within a rccess 26 formed below the combustion chamber of each furnace for catching the metal escaping-fromthe pot or container in case the pot or container should break. This recess 26 may be closed by means of a door 27 of any suitable type. e

The main difference form of my invention shown in Figs. 4, 5 and and the form shown in Figs. 1, 2 and 3, is that in the modified form the gases are introduced into the inner compartment and thence pass into the outer compartnent, instead of first entering the outer Compartment and passing from there into the inner compartment. Referring to Figs. 4:, 5 and 6, it is seen that in the modification, the outer compartment 12' communicates with the flue 17' and thus has a down draft produced therein. The inner compartment is closed to therfiue 17' during the operation of the device, by some suitable means, such.

as the block 28, upon which the pot or container 14' is adapted to rest. Beneath this block 28 is an opening 29 into the flue 17', whereby, when the pot or container breaks, the block 28 may be removed and the material from the pot may pass through the opening 29 into the pan 25' and thus be readily recovered.

The conductors 22' in this modification communicate with the inner compartment 11', tangentially, so that the gases which are introduced into the compartment 11' are given a whirling movement. These gases also move upward around'the pot 14:' and thence pass over the wall 13' into the comartment 12' and finally out through the Ene 17 to the stack.

between the modified Since it requires Very little time to prepare my improved furnace, for melting a charge of material, I am able to take more heats than is possible with furnaces using coal as a fuel, and for this reason I find it adyantageous to make use of some suitable means 'or artificially cooling the furnace. WVith this end in View, I have shown my furnace provided at the top with a water jacket 30.

Reference numerals 10', 18', 19', 20', 21', 23', 25', and 27' in Figs. 4, 5 and 6, apply to parts similar respectively to parts 10, 18, 19, 20 21, 23, 25 and 27, of Figs. 1, 2 and 3.

The method of operation of my improved furnace should be obvious from the above.

The advantages 'of my furnace over those heretofo're in use should also be 'readily recognized. -For example, I eiiect considerable economy in operation by eliminating the necessity of 'skilled labor, and'by reducing the possibility of fractu'ring the pots. Also I make it possible to take more heats in a given time in one furnace, than has been possible heretofore, thus reducing the overhead expense.

It isto be understood that I do not wish to limit myself to theidisclosure herein, sinceobviously many changes may be made in the apparatus described, by those skilled in the art, without departing from the spirit of my invention.

lVhat I claim is:

In a melting furnace, the combinaton of a combustion chamber, a wall dividing the lower portion of said clamber into two concentric conpartments communicating at the top, means located in the inner compartment for supporting a container for the material 'to 'be melted, conductors for introducing combustible gases into one of said Compartments, in such a direction that they are given a whirling-movement, and a flue located beneath said chamber and communicating with the other compartment and adapted to produce a down draft therein, said conductors being located in said fiue, whereby the gases are heated before they are introduced into said chamber.

In 'testimony whereof I have signed this specification in the presence of two subscribing witnesses..

ALEXANDER W. CARROLL. VVitnesses:

VVALTER S. JONES, M. M. RIEMANN.

Capin i? this patent may 'he obtained !or five cents each, by addressing the "Commisslouer of rtet.

' washington, D.

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