US1696822A

US1696822A - Continuous furnace

Info

Publication number: US1696822A
Application number: US29828A
Authority: US
Inventors: John B Tytus
Original assignee: American Rolling Mill Co
Current assignee: American Rolling Mill Co
Priority date: 1925-05-12
Filing date: 1925-05-12
Publication date: 1928-12-25
Anticipated expiration: 1945-12-25

Description

Dec. 25', 1928.

1,696,822 J. B. 'rv-rus CONTINUOUS FURNACE Filed May l2. 1925 Patented Dee. 25, 192s.

UNITED STATES `PNraNT ori-les..

JOHN B. T'YT'US, OF MIDDLETOWN, OHIO, ASSIGNOR TO THE AMERICAN ROLLING MILL COMPANY, 'OF MIDIYLETOWN, OHIO, A CORPORATION OF OHIO.

CONTINUOUS rUaNAcE.

Application ledlay 12, 19.25. ,Serial No. 29,828.

My invention relates to continuous furnaces of the type in which pieces of metal are fed through the furnace, for the purpose of adjusting their temperature. It partlcularly relates to furnaces 1n which the piece 1s carried on endless chains.

The difficulty met with in the past 1n furnaces in which chains are employed to carry the pieces over the rolls within the furnace has been the necessity of driving the chains by means of sprockets. The heat wit-hin the furnace is such that expansion and contraction of the chain links will result in the links hitting the advancing faces of sprocket teeth instead of engaging smoothly over them, as the chains are moved along, with theresult that a chain, with the piece carried upon it, rises-up on the sprocket, displacing the chain, andI also the piece carried thereby. Thus the sprocket teeth for a'chainmust be arranged a distance apart such that the advancing.

face of the teeth will engage the link 1pins without any free play, and under Vhigh eat conditions the distance between -link pins varies for different parts of the chain, due to irregular expansion and contraction, so that the riding of the chains up onto the'teeth of the sprockets is unavoidable.

It is the object of my invention to. overcome this particular diiliculty in chain feed furnaces, and this I accomplish by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed. l

In the drawing:

Figurel 1 is a diagrammatic vertical sec.- tion taken lengthwise throu h a furnace.

Figure 2 is a plan view o the rollers and drive, for the furnace.

Figure 3 is a side elevation of one of the end rolls. l

It is not intended to show all of the details of a furnace, but only suiicient to point out the features of my invention. I have thus in-` dicatedfurnace walls atl, with a'series of on, said sheaves having no teeth within their peripheral channels, and tlietchannels being of a size to easily retain the chains 6.l There are shown two chainsG and thus two sheaves on each shaft, in the illustration.

carrying level of the furnace are a series of f return. sheaves 9, over which the chains pass.

These sheaves are mounted-on shafts 10 and 11, of which4 shafts, the shafts l() may be idle, and shafts 11 driven, andare arranged so -that the return portions of the chains arev balancedwith relation to the carrying portions. l v

Pieces of metal are received onto the terminal r'olls'and chains and are carried through v\the furnaces 4by the chains. The shafts 11 i may be driven by gears 112|* andl chains 11b With adequate support for the return portions of the chains, and all sheaves rotated at the same speed, it may be observed that a balanced condition is provided, such that with chains, they will still be fed along even though the engagement with them is a fricout sprocket teeth in engagement with the in line, which purpose might, it is evident,

be provi-ded forin other ways. The essence of my invention is the frictional feeding of an endless chain, supported in a condition of balance as vto its return portion, so that a very slight force applied to itwill give it motion, and in the use ofl the motion so applied, to carry along pieces of metal through av furnace. l

Having thus described my invention, what I claim as new anddesire to secure by Letters Patent, is

' relatively smooth rotatable bodies'in the furnace, chains arranged over said bodies, said chains being endless and supported in a condition of balance as to-ther returny portions,

1.-In combination, a furnace, a series of and means for driving at least/one of the rotatable bodies.

2. In -combination,.a furnace, aseries ofrelatively smooth rotatable bodies arranged channels, rotatable bodies supporting the chains in conditionV of balance, as to its return portions, and means for driving the first Anoted series of rotatable bodies, said channels being formed relatively smooth so as to drive the chains frctionally only.

JOHN B. TYTUs.