US247943A - Annealing fubnaoe - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1'.

. W. N EHRING; ANNEALING FURNACE. N0. 247,943. Patented Odt. 4,1881.

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f J UNITED- STATES P TENT OFFICE.

WILLIAM NEHRING, OF OIN CINNATL OHIO, ASSIGNOR TO THE QUEEN OlTY MALLEABLE IRON COMPANY, (LIMITED,) OF SAME PLACE.

ANNEALlNQ-FURNACE.

SPECIFICATION forming part of Letters.Pa.tent No. 247,943, dated October 4, 1881.

' Application filed Jnly16, 188 1. momenta.)

To all whom it may concern:

Be it known that I, WILLIAM NEHRING, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Improvementin An-- healing-Furnaces, of which the following a specification.

My invention is more particularly designed for the production of malleable cast-iron.

It is well known that thelabo'r of putting the articles to he annealed into and getting them out of the furnace in the customary plan is attended with much delay and difficulty, and that, while within the furnace, some of the larger articles are insufficiently annealed, while other articles, becoming overheated, are liable to sag and to become welded together, and,besides inj uries received from these causes, are with djfliculty removed from the furnace.

With the object of economizing both material and labor, and withal producing better work, I'have so constructed my improved furnace that a full charge of articles to be annealed can be inserted. simultaneously, and,

when in the judgment of the furnace-man sufficiently annealed, can be as promptly removed.- To accomplish this I have constructed the bottom and frontof the oven or furnace on a strong iron frame-work mounted on wheels and movable toward and from the stationary portions along a rail-tracklikea truck. Except for the largest articles, the objects to be annealed are placed in crucibles or boxes, which boxes are stacked on the floor of said movable portion, which portion is then pushed into the furnace proper, of which thefloor of the truck then eonstitutes the bottom, and of which the wall at one end of the truck constitutes the closed door. This having been done, the joint between the fixed and movable portions is suffi-' eiently closed by means of brick.

In order to regulateanddirect the heat to dilferent parts of the oven, I construct my flues in several branches, one or more of which are capable of being wholly or partially closed at discretion of the attendant.

1n the accompanying drawings, Figure 1 is a longitudinal fore-and-aft section of an annealing furnace or oven embodying my invention. Fig. 2 is a section 011 the line as m, Fig. 1. F1g. 3 isa frontelevation with the tluek in -position. Fig. 4 is a section on the line 3 Fig. 2. Fig. 5 is a side elevation of my truck.

Fig. 6 is a partially sectioned elevation of a modification of my furnace, designed for the larger class of articles. Fig. 7 is asection on the line 2 z.

A represents an arched, vault of masonry,

open at both ends. This vault is dividedinto said.

The wall 13 has a line or uptake, I, which communicates at or near its lower part on the front side with a series of flues, J, that communicate with like flues, K, in the bed or floor 1 of the truck L. The uptake I discharges by flue N into a suitable chimney. (Not shown.) The fines K, near their front ends, communicate by short downtakesMwith the said larger compartment, which compartment, in conjunction with said truck,constitutes m yoven proper, Z. The fiues K extend preferably to the extreme front of the truck, so as to form open in gs K, in the manner represented, and eachis supplied with a movable plug or stopper, Q, which, being pushed rearward or drawn forward, serves to close or open the respective downtakes, and thus to regulate and direct the heat toparticular parts.

Rising vertically from the front edge of the truckfloor is a wall, P, which, when the truck, 0

is driven home, serves as the front wall of my oven, and also does duty as its door. Ventilators or cooling-inlets Q in the truckwall are closable by means of doors R, by partially or wholly opening of which air may be 5 admitted, either to assist combustion or to aid in regulating the heat, either generally or 10- l rally, as may be deemed necessary.

The doors R are preferably provided with mica windows S, to enable inspection from time to time of the interior of the oven.

T are the truck-wheels, resting upon a track or tramway, U.

V is an oiiset in the wall B, to receive the luting-briclis.

The dimensions of the truckwall are preferablyjust sufficiently less than the interior of vault A to permit the introduction of luting bricks or tiles W.

X represents a cast-iron slab, upon which are stacked the crucibles or boxes Y, which are charged with the articles to be annealed.

In the modification shown in Figs. (5 and 7 there are two parti-walls, B P. The smoke enters downtakes M at mid-length of truckfloor, thence escaping through two sets of fines, KK, to the two uptakes l I, and the truck and tramway are so disposed as to give a motion in or out parallel with, instead of at right angles to, the partiwaIls.

The modification, Figs. 6 and 7, although capable of use with crucibles, is chiefly de-i signed for articles of large dimensions, with which crucibles are not commonly employed.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. The combination, in an annealing'furmice, of the fire-place O,the parti-Wall, with its uptake I, and the truck L, with its wall P and fines M and K.

2. The combination, with oven Z, whose floor and front are component parts, of a separable truck, L, the orifices Q), and K in said front and orifices M in said fioor communicating with oven and with floor-fines K,respectively, the said floor-fines discharging into fines J, leading to uptakes I within fire-bridge B, said orifices being provided with regulating doors or stoppers, the whole being arranged and op erated substantially as set forth.

In testimony of which invention I hereunt) set my hand.

WILLIAM NEHRING.

\Vitznesses:

GEO. KNIGHT, SAML. S. 'IARPENT'ER.

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