US797135A - Art of manufacturing metallic members used in car construction. - Google Patents

Description

PATEN'TED AUG. 15,, 1905..

R. N LOWE?" ART OF MANUFACTURING METALLIC MEMBERS USED IN GAR CONSTRUCTION.

APPLICATION FILED NOV. 19, 1904.

fiVEA TOR.

[ V] T N E $515 5 NTTE STS FFIUE.

REGINALD N. LOW'RY, OF ALLEGHENY, PENNSYLVANIA.

ART OF MANUFACTURING METALLIC MEMBERS USED IN CAR CONSTRUCTION.

Specification of Letters Patent.

Patented Aug. 15, 1905.

Application filed November 19, 1904. Serial No. 233,389.

To all whom, (it may concern:

Be it known that i, REGINALD N. LOWRY, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented, new and useful Improvements in the Art of Manufacturing Metallic Members Used in Car Construction, of which the following is a specification.

My invention relates to the method or art of manufacturing a certain metallic member or blank which is substantially a round bar or rod with flat ends and which in various forms is used on cars as grab-irons, ladders, brake-lever guides, railings, roping-staples, and the like, the object of the flat end being to allow of a hole being made in the member by which it is secured to the car with rivets or bolts.

The object of my invention is to produce this round bar or rod with flat ends in a cheaper and quicker way than has been the practice heretofore.

My invention consists in the novel process of manufacturing this rod with flat ends, by which process the material used is the scrap metal sheared off in finishing the plates ontering into the car construction. The machinery used is that which is idle for a large part of the time in car-shops and which will allow of making this member in quantities with one operation, as is hereinafter set forth and claimed.

When the end of a round metallic bar is flattened, the cross-sectional area of the flat portion is less than the cross-sectional area of the round body, this being caused by the tendency of the metal to move equally in all directions from the center of the flattening force, the portions moving lengthwise of the bar being lost to the cross-sectional area of the flattened portion. The rods used to perform the functions on cars hereinbefore stated are so small in diameter that it has been found impractical to only flatten the ends on account of this decrease in the crosssectional area of the flattened end, which is further weakened by the rivet-hole. Hence we have the present practice, which is as follows: A round metallic bar of the requisite length is procured, and the ends are upset and then flattened. This operation of upsetting is to compensate for the decreases in the crosssectional area of the ends, as already set forth,

and requires much time and skilled labor and four heats to be taken.

My improved process is as follows, attention being directed to the accompanying drawings, in whicl Figures 1 to 6 show the various stages in the development of the member in question as made by my process.

A rectangular metallic bar is procured from the scrap material sheared off in finishing plates, such as I show in plan and side views by Figs. 1 and 2. This bar is then heated to a forging heat and formed by means of a die and in a press for a certain distance between its ends to a round or similar shape in crosssection, leaving the ends in their original flat shape, as shown in plan and side views by Figs. 3 and 4t. Figs. 5 and 6 show one of the many forms into which this member is bent to suit it to the requirements. The tendency of the metal to move equally in all directions, as hereinbefore stated, must be considered in mynew process also. As the rectangular bar in this case is compressed lengthwise in a die to a round section, it is necessarily elongated somewhat and reduced in cross-section. Hence the rectangular bar is procured of a larger cross-sectional area than the re quircd round body and correspondingly shorter, with the result that after being formed the flat ends remaining in their original shape will have an excess of material in their cross-section to compensate for the rivethole therethrough. Thus it will be seen that in one operation and with only one heat this rectangular bar is formed into its required shape from material that was otherwise scrap.

Having shown that my new process of manufacture will produce the same member as is produced by the present method, the follow ing advantages will be found in favor of my method: scrap metal used as material, the bar heated to a forging heat once only, a cheaper grade of mechanical labor used, by inserting a plurality of dies in the press a number of the members can be made in one operation, the final bending of the member to suit the requirements will be the same, in either case.

It is to be understood that a slight variation in the method of manufacture may be introduced without constituting a substantial departure. For instance, the order of the various steps may be transposed. The cen tral portion may be formed to a polygon or elliptical shape or the like instead of a round shape.

Having thus fully described my invention, What I claim, and desire to secure by Letters Patent, is-

The art of manufacturing car-blanks and the like, consisting in providing a flat or rectangular bar and forging the part between the ends to a round or approximately round shape in cross-section, leaving the ends in a flat shape.

In testimony whereof I afiix my signature in presence or two Witnesses.

REGINALD N. LOVRY. Witnesses:

M. B. BATES, R. B. Coon.

Images