US1021628A - Rolling or reducing mill. - Google Patents

Description

Patented Mar. 26, 1912.

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LLING OR RED LIUATTON FILED .1 91 u 1,021,628. Patented Mar; 26, 1912.

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ia lifi WALTER R. REEVES, OF EAST PRO VIDENCE, RHODE ISLAND.

ROLLING R minnows MILL Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed March 17, 1911. Serial No. 615.111.

T0 at. whom it may concern:

Be it known that I, WALTER R. REEVES, a citizen of the United States, residing at East Providence, in the county of Providence and State of Rhode Island. have invented a new and useful Improvement in Rolling or Reducing Mills, of which the following is a specification.

This invention relates to certain new and useful improvements in rolling or reducing mills and pertains more particularly to the driving means for the rolls.

In rolling or reducing mills the bottom roll is usually'the driven roll, the top roll being adjusted to givethedesired thickness to the metal being rolled by means of screws, the top roll being frictionally driven. It frequently happens that the metal cramps the top roll while at the same time the bottom roll is revolved. resulting in an excess of heat which burns a flat place on the top roll. \Vhen this occurs the top rolt has to be removed, and a new one substituted therefor, and the old roll ground to re We the flat place.

The object of the invention is to provide means whereby the above objection is obviated, the invention contemplating the intermittent driving of the top roll. in order to overcome the objection noted.

vIn the drawings: Figure 1 is a side elevation of a rolling mill equipped with the present invention. Fig. is a section taken on the line '22 of Fig.3, and Fig. 3 is a fragmentary longitudinal sectional view of the device. for intermitte tly driving the top roll. I

'lhepower shaft is designated 1 in the drawings which has connected thereto the power gear '2, the latter being in mesh with the roll gear 3 carried by the shaft 4, the

' shaft 4t being secured to and driving the bot:

tom roll 5 of the mill. An auxiliary shaft (3 connects the power gear .2 to the top roll 7 which latter is of less diameter than the roll 5 by means of a coupling which is interposed between the top roll ,7 and the shaft 6, the construction of which will now be described. The hub S of the top roll 7 is formed with a plurality of channels or grooves 9 in which integral extensions 10 of the ratchet wheel 11 project, whereby the ratchet wheel is keyed to'the hub 8 of the top roll 7 in a manner to rotate in unison with the latter. A housing 12 has aneck 13 formed at one end which latter is suitably keyed or otherwise rigidly secured to the auxiliary shaft 6 so as to rotate therewith. A series of pawls l-l are secured within the housing 12 by means of bolts 15, the pawls engaging the teeth of the ratchet wheel 11 as clearly clepic'ted,in Fig. 2 of the drawings. Owing to the differ- -ence in the diameters of the rolls the upper one will be driven faster than the shaft 6, but should the roll for any reason stop or reduce its speed below that of the shaft 6', the pawls will immediately enter into action and continue the rotation of the top run, so that stoppage is prevented, or the formation of a place obviated. It will thus be seen that it is impossible for the top roll to stop or reduceits speed below that of the shaft 6 since. while the top roll is capable of rotating or revolving at a faster or greater speed than that of the shaft 6, still thelatterbv virtue of carryng the pawls 1* in its rotatioii will always assure rotation of the top roll at the same speed as that of shaft 6.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a rolling mill, a power shaft having a gear, and an auxiliary shaft connected to the power shaft. 21. second shaft having agear in mesh with said first gear, a bottom roll connected to said second shaft. a top roll, and pawl and ratchet means between the top roll and said auxiliary shaft whereby thetop roll may rotate at a speed in excess ot that of the auxiliary shaft but not at a lower speed than that of the auxiliary shaft.

2. In a rolling mill. in combination with a power shaft. an auxiliary shaft connected thereto. a bottom roll, means for driving the bottom roll from the power shaft. a top roll frietionally-engaged with the bottom roll and driven thereby. and a pawl and ratchet connection between the top roll and the auxiliar shaft whereby the top roll is assuredof a speed of rotation atleast as fast as that of the auxiliary shaft. said connection permitting the bottom roll to drive the top roll at a greater speed than that of the auxiliary shaft.

3. ln a rolling mill, in combination with the bottom roll and the top roll frictionally drive-n thereby. a driving source "connected to the bottom roll, and pawl and ratchet means between the driving source and the top. roll whereby the top roll is positively a by the bottom roll.

4. In a rolling mill, a driving shaft, a bottom roll driven from the driving shaft, a top roll driven from the bottom roll and pawl and ratchet means connected to the top roll and to the driving shaft whereby the top .roll is always positively driven atleast as fast as that of the driving shaft and is capable of rotating at a greater speed than that of the driving shaft by said bottom roll.

5. In a rolling mill, a driving shaft, an auxiliary shaft, connected thereto, a bottom roll, a connection between the bottom roll and the driving shaft, a top roll frictionally driven by the bottom roll, a ratchet wheel keyed to the top roll, and a housing keyed to the auxiliary shaft and carrying the series of pawls for engagement with said ratchet wheel whereby the top roll may be driven by the bottom roll at a greater speed than that at which the auxiliary shaft rotates.

6.-In a rolling mill, in combination with a bottom roll and a top roll frictionally driven from the bottom roll, a driving means for the bottom roll and means including a pawl and ratchet whereby the top roll is positively driven from the driving means but is capable of being rotated at a greater speed than that imparted by said driving means to said bottom roll.

7. In a rolling mill a top roll, a lower roll for frictionally driving said top roll, means for positively driving the lower roll, and a name to this specification in the presence of two subscribing witnesses.

WALTER R. REEV F79.

Witnesses:

LEON H. ALLEN, J. A. MILLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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