US1468837A

US1468837A - Sheet or annealing furnace

Info

Publication number: US1468837A
Application number: US532319A
Authority: US
Inventors: Hans L B Schreck
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-01-27
Filing date: 1922-01-27
Publication date: 1923-09-25
Anticipated expiration: 1940-09-25

Description

Swat 25 H. L. B SCHRECK SHEET OR ANNEALING FURNACE File J n. 27. 1922 2 Sheets-Sheet l ZA/"VE'AZZ'OR 21,4@,;&37 H. L. B. SCHRECK SHEET OR ANNEALING FURNACE Sept. 25, 5923.

Filed Jan. 27, 1922 2 Sheets-=Sheet 2 Il-JVENTOR. W&i5l w HANS L. B. SCHRECK, OF WHEELING, WEST VIRGINIA.

SHEET OR ANNEALING FURNACE.

Application filed. January 27, 1922. Serial No. 532,319.

T 0 all whom it may concern:

Be it known that I, HANS L. B. Sonnncx,

residing at Wheelin in the county of Ohio and State of West irginia, a citizen of the United States, have invented or discovered certain new and useful Improvements in Sheet or Annealin Furnaces, of which improvements the fol owing is a specification.

Difficulty has been experienced in the operation of sheet heating or annealing furnaces in which the sheets are moved throu' h the furnace by rollers, in maintaining t e sheets central. The feed rollers are generally cylindrical and unless the sheets are carefully placed in the furnace they will move to one side or the other of the furnace, and their movement checked or retarded; and further, as it is the general practice to construct the rollers with a 'acket or covering of fine clay, they are rapi ly cut by the sheets so that some portions of the rol s will have a smaller diameter than the other portions and the sheets will move laterally onto the portions having the larger diameter.

It has been attempted to prevent lateral movement of the sheets by employing concave rolls, the middle portions being smaller in diameter than the ends. But unless the sheets are accurately placed on such rolls, i. e., with the center line of the sheet in line vertically with the smallest diameter of the roll, the sheet will move laterally; and further, in case of a more rapid reduction india'meter of one portion of such roll, the sheet will be drawn laterally by the larger portion of the roll.

The object of the invention described herein is to provide for the maintainance of the sheet in proper central position if propcrly fed into the furnace, and also to move the sheet laterally into such central osition in case it has not properly started into the furnace. It is a further object of the invention to prevent excessive heating of the rollers and consequent rapid cutting away of their surfaces by the sheets. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Fig. 1 is a sectional plan view of a sheet heating furnace having my improvement therewith combined; Fig. 2 is a sectional elevation, the plane of section being indicated by the line 11-11, Fig. 1; Fig. 3 is a view similar to Fig. 2 illustrating a modification of the-improvement; Fig. 4 is a sectional elevation of my improved feed roller; Fig. 5 is a view in elevation of the skeleton for such roller when a jacket of refractory material is employed; and Fig. 6 is a transverse section on a plane indicated by the line VIVI, Fig. 5.

In the practice of the invention-the furnace is constructed in the usual or any suitable manner, with doors at each end for the charging and removal of the sheets to be heated. The furnace may be heated by any suitable means using solid, liquid, or gaseous fuel. On each side of the furnace are arranged a series of bearings for the shafts 2- 0f the rolls, which may be driven by intermeshing gear wheels on the shafts 2 or by chains engaging sprocket wheels on the shafts. 1

As shown, the rolls are made conical and are oppositely arranged in the furnace, i. e., the large end of one roll being at one side of the furnace and the large end of the next roll bein on the opposite side of the furnace. T e peripheral speed of the larger end of the rolls being greatest, it will tend to cause a lateral movement of the ortion of the sheet in contact therewith, ut when such portion has assed to the next roller, the latter will tend to cause'an opposite lateral movement of the sheet, so that one roll will correct any lateral displacement due to the action of the preceding roll.

As shown, these rolls may be arranged with the axes of the rolls in the same horizontal plane as shown in Fig. 3, so that when a sheet rests thereon, it will be transversely curved, as in this condition the sheets will present greater resistance to drooping when passing out ofthe furnace. In lieu of arranging the rolls With their axes in the same horizontal (plane as above stated, they may be arrange with the axes at such an angle that the upper portions of their peripheries will'be in a horizontal plane, as shown in able distances from the shaft, such distances being dependent on the desired diameter of the roll. It is preferred that the ends of the pipe sections should be welded to the shaft sections and it is also preferred that the disc 3 should be made of such diameter that the pipes 4 will rest in notches in the periphery of the disc, which will then serve to prevent any lateral or inward flexure of the pipes.

It will be readily understood that by employing a suflicient number of pipes 4, say five, six or more, such skeleton roll may be used for feeding the sheets, but if preferred, this skeleton may serve to support a jacket of refractory material as shown in l ig. 4. The jacket may be formed by a number of hollow sections 5; these sections which are provided interior-1y with radial notches for the reception of the pipes 4, consist of sections having their ends constructed to project one into the other. These sections are slipped endwise onto the skeleton and are held in position by nuts 6, screwing onto threaded enlargements of the shaft section. It is preferred that two adjacent sections of the jacket should be spaced apart to com ensate for expansion and contraction, an in order to prevent any moving back and forth of the sections, springs 8 are interposed between the disc 3 and plates 9 movable along the shaft sections and bearing against internal shoulders in the jacket sections.

1 claim herein as my invention:

1. A feed rol er for furnaces having in combination a shaft having hollow end or tions, and bent pipe sections having t eir ends connected to the hollow portlons of the shaft.

2. A feed roller for furnaces having in combination a hollow shaft, bent pipe sections having their ends connected to the shaft, and means arran ed intermediate the points of connection 0 the pipes with the shaft for preventing the flow of cooling I fluid through the shaft.

3. A feed roller for furnaces havin in combination a shaft consisting of ho low sections, a metal disc interposed between adjacent ends of the shaft sections, bent pipes having their ends secured to the respective shaft sections in opposite sides of the disc.

4. A feed roller for furnaces having in combination a shaft consisting of hollow sections, bent pipes having their ends secured to the respective shaft sections, and a. disc interposed between adjacent ends of the shaft sections and -ada ted to support the pipes at points interme iate their ends.

5.-A feed roller for furnaces havin in combination a shaft consisting of be low sections, bent pipes havin their ends secured to the respective sections, the intermediate portions of the pipes being spaced from the shaft, and a jacket of refractory material supported by the pipes.

6. A feed roller for furnaces havin in combination a shaft consisting of ho low sections, a disc interposed between adjacent ends of said sections, bent pipes having their ends secured to the respective sections, tubular blocks adapted to be supported by the pipes, adjustable abutments on the shaft sections for holding the blocks in position and springs for holding the blocks in contact while permitting expansion of the books.

In testimony whereof, I have hereunto set my hand.

HANS L. B. SCHRECK.