US1072488A - Driving-pinion for rolling-mills. - Google Patents

Description

W. G. NICHOLS.

DRIVING PINION FOR ROLLING MILLS.

APPLICATION FILED SEPT. 27,

Patented Sept. 9, 1913.

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WESLEY G. NICHOLS, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNORTO EDGAR ALLEN AMERICAN MANGANESE STEEL COMPANY, OF AUGUSTA, MAINE, A CORPORATION or MAINE.

DRIVING-PINION FOR ROLLING-MILLS.

To all whom 2'2 may concern 7 Be it known that I, WVEsLEY G. NICHOLS, a citizen of the United States, and a resident of Chicago Heights, in the county of Cook and State of Illinois, have made and invented certain new and useful Improvements in Driving-Pinions for ltolling Mills, of which the following is a specification.

My invention relates to an improvement in driving pinions especially designed for severe service such for instance as driving the rolls in rolling mills, the object thereof being to provide a pinion in which the gear teeth are formed upon a sleeve separate from and secured to the driving shaft, in stead of being formed integrally with a section of the shaft through which the rolls, or similar devices, are driven, as has usually been the case. This feature of construction enables me to form the driving shaft itself, or a section thereof, from Wrought metal especially adapted for that purpose, such as forged nickel steel, and to form the sleeve carrying the gear teeth, which must necessarily be formed from cast metal, from manganese steel, a material possessing qualities of toughness and hardness to a degree rendering it especially well adapted for use in pinions of this character.

In order to secure a pinion having teeth of manganese steel, the pinion itself, and a section of the driving shaft have been commonly formed as a single integral casting, notwithstanding the fact that such steel is not considered the best metal from which to form the shaft. Such castings have been difficult to make, and unduly expensive, and open to the objection that defectsnot readily detected, and hard to avoid, often cause the rejection, or failure in use, of an exceedingly expensive casting.

In the practice of my invention, the difiiculties above enumerated are avoided, and the portion to be cast from manganese steel is so simplified in form as to be more readily The weight thereof is greatly reduced, and the driving shaft formed from a. material capable of being forged, thus reducing the cost of the pinion as a whole, which is considered as including a section of the driving shaft, and rendering it better adapted for the purpose for which it is designed.

With the objects of invention above enumerated in view, my invention consists in Specification of Letters Patent.

Application filed September 27, 1911.

Patented Sept. 9,1913. Serial No. 651,637.

the improved driving pinion hereinafter described and claimed, and illustrated in the drawing accompanying and forming a part of this application.

In the drawing wherein the preferred embodiment of' my invention is illustrated; Figure 1 is a view partly in side elevation andpartly in section showing my improved driving pinion, and, Fig. 2 is a view showing a section upon a transverse plane indipazted by the line 22, Fig. 1, looking to the e t. s

Referring to the drawing 3 represents part of a section of a drivin shaft and 4 an enlarged portion thereo circular in cross-section upon which a shell 5 is placed, which shell has gear teeth 6, formed upon its periphery, the number, arrangement, and form of such teeth being a matter of design and determined by the particular service for which the pinion is intended. The shell 5 is secured to the enlarged portion 4 of the shaft in part by friction between the two, and in part by keys 7 The driving shaft 3 is formed from wrought metal such as nickel steel, and is given the required shape and size preferably by forging processes, the result being a shaft well adapted to withstand the torsional stresses met with in heavy service.

The shell 5 and gear teeth 6 are formed from cast metal, such as manganese steel, the proper form being thus imparted to the teeth without machining the same, the material specified resulting in teeth that are extremely tough and hard, and which are especially well adapted to endure and give long and satisfactory service when used to drive the rolls in rolling mills. The shell 5 is preferably cored internally, as shown at 8, in order to reduce the amount of metal therein and to provide for a more uniform thickness throughout the same.

Having thus described and explained my invention I claim and desire to secure by Letters Patent 1. Driving means comprising a wrought metal shaft and an annular shell continuous throughout its circumference secured in place thereupon; said shell being formed from east manganese steel and having a series of gear teeth upon its periphery, and having also a series of recesses extending outward from said shaft into the body of the shell and located in line with the teeth aforesaid, each of said recesses having a single opening leading thereinto.

2. An annular shell continuous throughout its circumference formed from cast manganese steel and having a series of gear teeth upon its periphery; and having also a series of recesses extending outward from its inner surface and into its cast metal body portion, said recesses having each a single opening leading thereinto and the location of said recesses being in line with the teeth aforesaid.

3. Driving means comprising a Wrought said, each of said recesses having a single opening leading thereinto.

Signed at Chicago Heights, in the county of Cook, and State of Illinois, this 12th day of June, A. D. 1911.

VESLEY G. NICHOLS. Witnesses:

JN'o. G. COUGHLIN, CHARLES PAITSTROM.

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

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