US960434A

US960434A - Annealing-furnace.

Info

Publication number: US960434A
Application number: US52476409A
Authority: US
Inventors: James Davis Swindell
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-10-26
Filing date: 1909-10-26
Publication date: 1910-06-07
Anticipated expiration: 1927-06-07

Description

J. D. SWINDELL.

' ANNEALING FURNACE.

APPLIGATION FILED OCT. 26, 1909.

Patentd June 7,1910.

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fidzw/ NTOR A Home J. D. SWINDBLL. ANNEALING FURNACE; APPLICATION I'I LED OCT. 26, 1909 Patented June 7, 1910.

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Ill/l INVENTOR WITNESSES U n M U A JAMES DAVIS SWINIDELL, F PITTSBURG, PENNSYLVANIA.

ANNEALING-FURNACE.

Specification of Letters Patent.

Patented m a, 1910.

Application filed October 26, 1909. Serial No. 524,764.

To all whom it may concern.

Be it known that 1, JAMES Davrs SWIN- DELL, of Pittsburg, in the county'of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Annealing-Furnaces; and I do hereby declare the following to be a full,

clear, and exact description of the invention,

such as will enable others skilled inthe art to which it appertains to make and use the same.

This invention relates to metallurgical apparatus and more particularly to improvements in annealing furnaces, the object of the invention being to construct an annealing furnace m'such manner as to insure an adequate and even distribution of heat in the furnace chamber with of gaseous fuel. 1

A further object is to so construct the furnace that the combustible mixture of air and gas will beproperly united before becoming discharged into the furnace chamber.-

an economical use W'ith these objects 111 view the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims;

In the accompanying drawings, Figure 1 is a, transverse sectional View of an annealing furnace embodying my improvements.

Fig. 2 is a horizontal sectional view showing sections of the structure on lines F-F, G-G, HH and also E-'E of Fig. 1. Fig. 3 is a vertical longitudinal section on the lines AA, BB, and C0 of Fig. 2, and Fig. 4 is a front elevation.

1 represents a furnace structure having therein a heating chamber 2 provided on its floor 3 with suitable supports 4 to receive the articles to be annealed or the containers of such articles. I

In the lower portion of the-furnace structure at respective sides thereof, gas flues 5 are located and receive gas from suitable vertical pipes or flues 6 which communicate at their upper ends with a gas main 7. A

series of vertical gas passages 8 communicate at their lower ends with the respective gas flues 5 and at their upper ends, these gas passages discharge at 9- into the furnace chamber at respective sides of the latter.

Located centrally in the base portion of the furnace structure is a horizontal stack flue 10 which communicates at one end with a stack 11. Thestack flue 10 is provided at its top with a series -of inlet openings t2 which communicate with lateral passages 13 and the latter communicate at their outer ends with passages 14,sa'id'

passages

13 and 14 being formed-within a chamber 15- under the lloor of the heating chamber, by means out a horizontal bafile or partition 16 as clearly shown in Fig. 1.; The passages 1a communicatc at the center of the furnace chamber with outlet openings 17 for hot gases and products of combustion as hereinafter explained. Between the central stack'fiuelO and each gas flue 5, an air flue 18 is located. With the side of each air flue 18 nearest the stack flue 10, a passage 19 communicates and, after passing the side wall of the stack flue and the bottom and endwall of chamber-15,-

said passage 19' communicates with the gas passage 8 below the discharge'end of the-lab ter,a gas. and air mixing chamber being thus formed at 20 so that the gas and air will have been nlixed before being discharged through the openings 9 into the furnace chamber. It will be understood that the construction last above described occurs at both sides of the furnace structure as shown in Fig. 1.

.From the construction and arrangement of parts above described it'will be readily understood that combustible mixtures of air and gas at proper temperature-will be dis-' charged into the furnace chamber at respective sides of the latter and that the Waste heat and products of combustion will find their exit at the longitudinal center of the furnace chamber through the outlets '17 and through the

passages

14 and 13 and finally into the top of the horizontal stack fine 10,

from which latter they will escape through the stack 11. [t is apparent that the heat of the products of combustion escaping through the

passages

14, 13 and stack flue 10 will be utilized to raise the temperature of the air as it passes from the air fines through the passages -19 to the vertical passages 8 where said air mixes at 20 with the gas as previously explained.

The furnace is provided at one end with suitable doors 21; the stack may be provided with a suitable damper 22 and various changes mi ht be made in the details of construction o my invention without departing from the spirit thereof or limiting its sco and hence I do not wishto restrict mysel to the recise'details herein set forth.

Having tiilly described myinvention what I discharge outlets with said stac I claim as new and desire to secure by Letters-Patent, is, 4

1. The combination of a furnace structure having a heating or annealing chamber, gas flues located in the furnace structure below the plane of the heating or annealing chamber, passages communicating with said gas flues and with the heating or annealing chamber at respective sides of the latter, air

passages communicating with said gas passages below the discharge ends of the latter thereby forming mixing chambers between the ends ofsaid gas passages, and means for conveying products of combustion from the longitudinal central portion of the heating or annealing chamber and in.proximity to the wall of said air passages.

2. The combination of a furnace structure having a heating or annealing chamber, gas flues. located at respective sides'of the fur nace structure below the plane of the heating or annealing chamber, gas'passages communicating at their lower ends'with said gas fines and at'their upper ends with the heating or annealing chamber at respective sides of the latter, air flues located adjacent to the gas flues, passages communicating with said air flues and with said gas passages below the discharge ends" of the latter, discharge outlets communicating with the longitudinal central portion of the heating or annealing chamber for the dischargeof products of combustion, a stack, and passages adjacent to the air passages connectin the central 3. The combination of a furnace structure having a heating or annealing chamber, gas flues located in the base portion of the furnace structure 'at respective sides of the latter and below the plane of the heating or annealing chamber, gas passages communicating with said gas flues and discharging into the heating or annealing chamber at respective sides of the latter, a centrally located stack flue, passages connecting said stack flue with the longitudinal central portion of the heating or annealing chamber, air fines located between the central stack flue and the side gas flues, and air passages communicating with the inner sides of the air flues and with the gas passages below the discharge ends of the latter, said air passages located adjacent to the passages which communicate with the stack flue and the central portion of the furnace chamber.

4. The combination of a furnace structure having a heating or annealing chamber, inlets for air and gas communicating with said chamber at the sides thereof, means for supplying gas'to said inlets, a centrally located stack flue in the base portion of the furnace structure, means forming chambers under the floor'of the heating or annealing chamber, and baffles or partitions in said chambers forming assages communicating with each other and respectively with the top of the stack flue and with the central portion of the'heating or annealing chamber, and air passages adjacent to said last mentioned passages and communicating with said inletsatthe sides of the furnace chamber.

5."The combination of a furnacestructure having a heating or annealing chamber, gas flues at respective sides of the furnace structure below the plane of the heating 01' annealing chamber, gas passages communicating with said gas flues and with the heating or annealing chamber at respective sides of the latter, acentrally located stack flue in the base portion of the furnace structure, means forming a chamber above the stack flue and under the floor of the heating or annealing I chamber, a baffle or partitionoin said inter posed chamber forming passages communicating with each other andfgcommunicating respectively with the top of'the furnace flue and the central portion of the heating or annealingchamber, air flues interposed between the gas flues and stack flue,and passages be tween the stack flue and air flues and between the gas and air flues and the bottom and side walls of the interposed chamber, said passages communicating with the air flues at the inner sides thereof and with the gas passages below the dischar e ends of the latter.

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

JAMES DAVIS SWINDELL. Witnesses: I

H; A. SHAFFER, S. C. CARVER.