US960969A - Furnace. - Google Patents

Description

H. N. LEASK.

FURNACE.

APPLICATION FILED SEPT. 9, 1907.

Patented J1me '7, 1910.

2 SHEETS-SHEET l.

INVENTOR H. N. LEASK.

FURNACE.

APPLICATION FILED SEPT. 9, 1907.

960,969, Patented June 7, 1910.

2 SHEETS-SHEET 2.

WITNESSES. 1 NVENTOR.

HENRY NORMAN LEASE, EGREMONT, ENG-LAND.

FURNACE.

Specification of Letters Patent.

Patented June '7, 1910.

Application filed September 9, 1907: Serial No. 392,003.

To all wl wm it may concern."

Be it known that I, HENRY NORMAN LEAsK,

British subject, and resident of E remont, county of Chester, England, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

This invention relates to furnaces of the type describedin the specification" attached to my application for patent filed concurrently with the present application Serial Number 392,004 and in which a furnace constructed with a rising and falling grate is described and has reference to a s ecial construction of furnace built accordlng to the invention described in such concurrent application.

It consists essentiall of a furnace in which the whole or part of the sole table or hearth of the fire is constructed in such a manner that it can be raised or lowered as desired and so that, when lowered, it can be dropped on to a truck or carriage to enable the hearth and its charge or contents to be wholly removed from the furnace, and to enable a discharged or a freshly charged grate to be run into position and raised into the furnace. Such a construction permits of very easily and readily charging or discharging or clinkering a furnace ofinserting or withdrawing a billet or ingot, or a crucible or the like and of readily transportin same to 1 any desired position, and is app icable to any furnace 1n which it may be found advantageous to so remove the hearth or a portion thereof.

The invention will be fully described with reference to the accompanying drawings.

Figure 1 is a transverse section through the furnace. Fig. 2 is a section on the line w:v, Fig. 1. Flg. 3 is a transverse section through the furnace shown provided with a charging chamber.

The upper part of the furnace or cell A is of any usual construction. The grate or hearth B is supported on a hydraulic or other ram 6 in such a manner that it can be.

hollow boxes Q and b which constitute sideand end air supplying means for the grate when the latter is elevated, said boxes being suitably secured to the walls of the cell and provided with perforations through which the air supply for the furnace is passed. If desired these boxes may be divided and steam or water as well as air may be passed into the fire.

The hollow boxes surrounding the grate as above noted are practically continuous or provide an airsupplying rim with an inner wall sloping downwardly and outwardly or sloping toward the bottom of the rim or box so that the clinkers will fall away from the rim or box and'be carried downwardly with the grate as the latter is lowered.

The ram b for raising and lowerin the I grate preferably passes through the ame of the truck R and'when the grate B rests on the latter the ram is lowered still farther out of the way of the truck. The latter is then moved into the chamber H where the air supply for the furnace may be passed over or through it to extract the heat from any clinker, or other charge thereon it may be desired to cool. This form of grate may with great advanta e be applied to refuse destructors as the refuse can be burned thereon continually without the necessity of stopping the furnace to clear the grate of clinker. As the refuse is burned thereon and the clinker is formed the grate is gradually lowered without any interference with the air supply which enters through the end boxes and side boxes 6 Q. If desired guides S may be provided to maintain the grate in the proper position, as it is raised or lowered.

In one form of the invention a second inclosed chamber T (see Fig. 3).v may be constructed in front of the lower portion of the either char ed or uncharged may be in readiness to pus the hot grate and its heated or burned out charge into the chamber H, at the same time taking up a position ready for be in raised into the fire.

This invention is specially applicable for furnaces in which billets or ingots of metal are to be heated or in which metal or the like is to be melted or for any other furnace in which it may be advantageous to remove the grate or a portion thereof. Any convenient means other than a hydrauhc ram may also be employed for raisln-g the grate into position in the furnace and suitable me chamcalmeans may also be employed if desired to maintain the hearth in-the raised position.

It will be evident that the furnace has a combustion chamber provided with a grate which is movable toward and from its operair box having a figred position in the fur-' nace a ainst which the grate is placed when in norma position, a carrlagejocated below the normal osition of the grate to receive the latter w en it is lowered, and means located below the carriage and movable upwardly through the latter to en age the grate for placing and displacing t e latter.

2. The combination of a furnace Having a grate mounted for rising and fallin motion, a coolin chamber opening into tie lower art of t e furnace and outside, of the main rnace structure, a carriage movable into and out of said coolin chamber and also under the place occupie by the grate'when the latter 1s m normal position in the furnace, and means for raising and lowering scopes the grate and permitting grate to rest a position over the ram, the ram being adapted to lower a grate onto said carriage or to elevate a grate from off the carria e into 0 erative relation with the com ustion c amber.

4. The combination of a furnace having a combustion chamber provided with a rismg and falling grate, a ram to raise and lower the said grate, a carriage movable to'a position over the ram, the ram being adapted to lower the grate onto saidcarriage or to elevate'the grate from ofi:' the carria e into 0 erative relation with the com ustion c amber, and cooling and char ing chambers located at opposlte sides of t e space in which said ram is located.

' In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

HENRY NORMAN LEASK.

' Witnesses:

J. OwnnN'OBnmN, HARRY BARNFATrmR.

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