US1615307A

US1615307A - Truss member and method of making same

Info

Publication number: US1615307A
Application number: US691154A
Authority: US
Inventors: Alvin C Mccord
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-02-07
Filing date: 1924-02-07
Publication date: 1927-01-25
Anticipated expiration: 1944-01-25

Description

- 25 ,A. c. M coRo 'rnuss MEMBER AND METHOD OF MAKING saws Filed Feb. 7, 1924 3 She ets Sheet 1 flue/21b)" \g Li /M (MY-Yard Jan. 7

. A. C. M CORD TRUSS MEMBER AND METHOD OF MAKING SAME Filed Feb. 7 S Sheet s-Sheet 2 1/, 4 III 192 l 615 307 Jan 25 7 A. c. M CORD TRUSS MEMBER AND METHOD OF MAKING SAME Filed Feb. '7, 1924, 3 Shoots-Sheet 5 fiuwzir EJ55 007 6 /7 0 iii Patented Jan. 25, 1927.

ALVIN C. MOCORD, OF CHICAGO, ILLINOIS.

TRUSS MEMBER AND METHOl) OF MAKING SAME.

Application filed February 7, 1924. Serial No. 691,154.

This invention relates to truss members,

particularly adapted for use as side framesand bolsters for car trucks and for such other car parts requiring truss members of the character to which my invention has reference.

Among the objects of my invention is to form these members from slitted one-piece bars or blanks of rolled steel folded lengthwise on themselves at their unsevered portions where the parts of the members are integrally connected to provide integral structures possessing the advantages of cast steel forms as heretofore used as to reduction of parts, but overcoming the unyielding rigidity and weight of cast steel by gaining lightness of weight for the same loads and the flexibility of spring action of the rolled metal.

Another object of my invention is to make the upper arch bars or compression members of the truss members, when used for side frames, shorter than the lower arch bars or tension members so that the floors of the cars maybe built closer to the roadbed for increasing their load carrying space without raising the heights of the cars above that established for standard by the Master Car Builders Rules.

A further object of my invention is to secure the journal boxes to the folded end sections of the side frames either by bolts or by casting the tops of the boxes to said end sections when boxes having pressed steel cellars and cast steel tops are used.

My invention also has reference to the manner in which the blank or bars are slit and the method of folding and bending the same to produce or form said truss members.

Other and further objects of my invention will appear from the following specification taken in connection with the accompanying drawings, in which--- Fig. 1 is a perspective view of a flat bar or blank slit in accordance with my invention and from which the truss member is formed;

Figs. 2 to 5, inclusive, are perspective views illustrating the various steps through which the blank or bar of Fig. 1 passes to form the truss member into side frame form;

Fig. 6 is a side view of the side frame with journal boxes secured thereto;

Fig. 7 is an end view of the structure of Fig. 6:

Fig. 8 is a side view of one end of the side frame, showing how the ends of the tie bar sections are flattened and overlapped under the bottom of the journal boxes, instead of the arrangement .shown in Figs. 4 to 7 Fig. 9 is an end view of the side frame of Fig. 8;

Figs. 10, 11, and 12 are top plan, side and bottom views,respectively, of the side frame showing another manner of securing the ournal boxes thereto;

Figs. 13 and 14 are vertical sectional views on lines 1313 and 1 l14, respectively, of Fig. 11; and

Fig. 15 shows another way of having the tie bar sections engage a journal box.

The truss member of my invention is formed from a flat bar or blank 1, which, as shown in Fig. l, is rectangular in shape and preferably of rolled steel. Slots 2, 3 are cut through the bar substantially parallel to each other and to the side edges of the bar. The slots 2, 2 are the outside ones and are on opposite sides of the

slots

3, 3. There are four of the slots 2, 2, all of the same length, with two at each end of the bar or blank 1 and opening through the end edges thereof, as shown in Fig. 1. The slots 2, 2 at one end of the bar are aligned with the corresponding ones at the other end of the bar and have their inner ends terminating short of each other at points intermediate the ends of the

slots

3, 3. The

slots

3, 3 have the same length and have their ends terminating short of the end edges of the bar, as shown in Fig. 1.

The slots 2 and 3 divide the bar or blank 1 into a mid-section 4 and

side sections

5, 5 and 6, 6. hen the truss member formed from the blank or bar 1 is used as a side frame for car trucks, the midsection 4 constitutes the upper arch bar or compression member, and the two

side sections

5, 5 become the lower arch bar or tension member, while the

outermost side sections

6, 6 form the tie bar. The

unsevered sections

7,7 at the ends of the blank between the slots 2, 2 form the parts of the side frame structure to which the journal box is secured, as will hereinafter more fully appear.

After slitting the bar or blank 1, the midsection 4: and its

adjacent side sections

5, 5 are bent out of the plane of the blank on the same side thereof and given the final shape of the lower arch bar. The

tie bar sections

6, 6 are left unbent and they are carried out of the plane of the blank 1 with the

side sections

5, 5, the end sections 7 7 remaining in the plane of the blank. This makes the blank shorter through the mid-section 4, as indicated in Fig. 2 by noting the difference in length between the blank through the mid-section 4: and the length of the tie bar sections 6, which still retain the original length of the blank or bar 1.

The

tie bar sections

6, 6 are next folded over on the

side sections

5, 5 along the line of metal integrally connecting the same between the ends of the slots 2, 2. The blank now appears as in Fig. 3. The next step of my method consists in folding the metal blank or bar 1 on itself on its

end sections

7, 7 in line with the

slots

3, 3, as indicated by dotted lines a, a in Fig. 3. This is accomplished by swinging the

side sections

5, 5 and their connected

tie bar sections

6, 6 on that side of the plane of the

end sections

7, 7 opposite the mid-section 1. The blank or bar 1 now appears as in Fig. 4 and the

inner side edges

5, 5 including the folded edges 0, c of the

tie bar sections

6, 6, are in abutting relation, as shown in that figure. At this time the

sections

5, 5 have the same shape as the mid-section 4 and both extend to a like extent on opposite sides of the plane passing between them and containing the end sections 7 7 the latter being new formed of a double thickness of metal by the end portions of the

sections

5, 5 or marginal portions of the end sections being folded under the mid-portions thereof on lines a, a, as shown in said Fig. 4. The inner edges d, d of these folded portions abut or are closely opposed, as shown in said figure.

For truck frame purposes, the mid-section 4c is now heated and flattened or upset toward the

sections

5, 5 to bring the midsection 4 in the plane of the

end sections

7, 7 or just above the same, depending on the design Wanted for the side frame and the distance that the floor of the car is to be above the roadbed. When upsetting the mid-section 4, the end sections 7 7 are held -by a die or other apparatus to prevent lengthening of the folded element, thus causing the excess metal in the mid-section l to expand laterally and make said section wider at its center, as shown in Fig. 5.

The folded bar or blank 1 now appears as in Fig. 5, and the

end sections

7, 7 are provided with a pair of holes 8, 8 to receive

bolts

9, 9 for holding between the end sections 7 and tie bar sections 6,

journal boxes

10, 10. The folded end sections 7 extend over the tops of the boxes, while the

tie bar sections

6, 6 extend under the bottoms of the same, where they are weleed together so as to prevent their separation and provide anchorage for the lower ends of the

bolts

9, 9 which pass through bolt holes 8, 8 therein. The extreme outer ends of the

sections

6, 6 are first cut off to make them have a length of the side frame through the

end sections

7, 7 and the outer ends of the

sections

6, 6 are brought up sulliciently to properly engage under the bottoms of the

journal boxes

10, 10, as required for side frame purposes. 1

suitable center structure (not shown) will be employed between the upper and

lower arch bars

4 and 5 as needed for side frame uses.

Instead of having the

tie bar sections

6, 6 welded together as suggested, they may be flattened out in their planes, as shown in Figs. 8 and 9. As there illustrated, flattening the end portions f, f of the sections makes them considerably wider than in Fig. 4, and with their flattened ends overlapping provides anchorage for the

box bolts

9, 9 without welding of the sections together, as shown in Fig. 6.

When the folding process reaches Fig. l, the

tie bar sections

6, 6 are longer than the side frame through its folded

end sections

7, 7 and extend outward beyond the same at the ends of the side frame. Instead of cut-- ting off these projecting ends as suggested for Figs. 5 to 9 and using bolts 9 for secur ing the journal boxes in place, I may use these projecting ends for that purpose and thus dispense with these bolts after the metal of the upper arch bar 4: has been upset to shorten it as shown in Fig. 5. The journal boxes are secured in this manner in the side frame shown in Figs. 10 to 15. Except for the difference mentioned, the side frame of these figures is folded from a flat bar or blank 1 in the same manner as described for the preceding figures.

he journal boxes 11, 11 of Figs. 11 and 14 have pressed steel cellars 12 and cast steel tops 13. The cellars 12 are made independ ent of the tops and assembled on the end portions of the

tie bar sections

6, 6 below the same. The outer ends 9, g of said sections are bent up around the outside of the cellars and against the same. The tops 13 of the boxes are cast on the cellars and around the end sections 7, of the upper arch bar 4 and the underlying portions of the lower

arch bar sections

5, 5. The metal of the top 13 forms around the folded sides a, a of these parts and partly over the tops of the

end sections

7, 7 as

flanges

16, 16, as shown in Fig. 14. As there shown, the ends of the

tie bar sections

6, 6 are brought close together and extend to the tops 13 and are secured. thereto by having depending parts 14 of the tops cast about the bar ends g g.

A center structure 15 of the desired form may be cast in the space between the upper and

lower arch bars

1, 5 and have

upper flanges

17, 17 extending around and over the side edges of the upper arch bar 4: and depending

flanges

18, 18 at the side edges of the lower arch bar sections 5. Being cast in this manner holds the center structure in place for the bolster and associated parts.

Instead of having both ends 9, g of the tie bar sections (i 6 on the outside of the boxes 11, I may do as shown in Fig. 15. As there illustrated, one section 6 of the tie bar is bent up around the outside of the cellar l1, and the other tie bar section 6 is bent up against the inner side of the box cellar. As before, the top 13 of the boX is cast to its cellar and about the

ends

6, 6 to hold them in place.

The truss of my invention accomplishes the objects heretofore set forth and may be put to use where a truss of this character may be required. I do not therefore wish to be limited to the particular use specified nor to the details of structure shown and described for they may be variously changed and modified without departing from the spirit and scope of my invention.

I claim as my invention:

1. A side frame for car trucks formed from a flat bar of metal and having upper and lower arch bars integrally connected at the ends of the side frame, the lower arch bar being brought to its position with respect to the upper arch bar by folding the metal bar on itself at its ends where the arch bars are connected.

2. A side frame for car trucks formed from a flat bar of metal and having upper and lower arch bars and a tie bar, said arch bars being integrally connected at the ends of the side frame and the tie bar being integrally connected with the lower arch bar between the ends of the latter, said tie bar being folded on the lower arch bar where connected therewith, and said lower arch bar being brought to its position with respect to the upper arch bar by folding the metal bar on itself at its ends where the arch bars are connected.

3. A side frame for car trucks formed from a flat bar of metal and having upper and lower arch bars integrally connected at the ends of the side frame, the lower arch bar being brought to its position with re spect to the upper arch bar by folding the metal bar on itself at its ends where the arch bars are connected, said upper arch bar being made shorter than the lower arch bar during the forming of the side frame from the metal bar.

4. A side frame for car trucks formed from a flat bar of metal and having upper and lower arch bars integrally connected at the ends of the side frame, the lower arch bar being brought to its position with respect to the upper arch bar by folding the metal bar on itself at its ends where the arch bars are connected, said upper arch bar being made shorter than the lower arch bar by upsetting the metal of the upper arch bar.

5. A side frame for car trucks formed from a flat bar of metal and having end sections to which journal boxes may be secured, and upper and lower arch bars between and integral with said end sections, said lower arch bar consisting of two sections side by side and brought to lower arch bar position from opposite side of the upper arch bar by folding the metal bar on itself at its end sections.

6. A side frame for car trucks formed from a flat bar of metal and having end sections, upper and lower arch bars between and integral with said end sections, said lower arch bar consisting of two sections side by side and brought to lower arch bar position from opposite sides of the upper arch bar by folding the metal bar on itself at its end sections, and tie bars integrally connected with the lower arch bar sections between the ends thereof with one tie bar on each of said sections and folded on the same along the line of connection therewith.

7. A truss member having its end sections folded on themselves lengthwise of said member to provide overlapping folded portions at the ends thereof, and tension and compression members between and integral with said folded portions.

8. A side frame for car trucks having its end sections folded lengthwise of the frame to provide overla tiping fold-ed portions at the ends thereof, upper and lower arch bars between and integral with said folded portions, and a tie bar integrally connected with the lower arch bar between the ends thereof, said tie bar extending to and spaced from the end sections to receive journal boxes therebetween.

9. A side frame for car trucks having end sections with their marginal side portions folded toward each other under and against the mid-portions of said end sections, upper and lower arch bars between said end sections with the upper arch bar integral with the unfolded mid-portions thereof, said lower arch bar consisting of two sections side by side and integrally joined with the folded portions of said end sections, and tie bars integrally connected with the lower arch bar sections between the ends of the latter, said tie bars being folded under and against the lower arch bar sections where joined thereto with their folded edges inside and opposed, said tie bars extending to the end sections and spaced therefrom to receive journal boxes between them.

10. In an assembly of the character described, the combination of acar truck side frame made of sheet steel and having end sections, upper and lower arch bars between and integral with said end sections, andjournal boxes secured to said end sections by having their tops cast thereto.

11. In an assembly of the character de' scribed, the combination of a side frame for car trucks having end sections, upper and lower arch bars between and integral with said end sections, and journal boxes having pressed steel cellars and cast tops, said tops being cast on said end sections for securing I the journal boxes thereto.

12; In an assembly of the character described, the combination of a side frame for car trucks having end sections, upper and lower arch bars between and integral with said end sections, and journal boxes having pressed steel cellars formed independent of their cast tops, said tops being cast to said cellars and on said end sections of the side frame for securing the boxes to said frame.

13. In an asse ably oi the character described, the combination of a side frame for car trucks having end sections, upper and lower arch bars between and integral with said end sections, and a tie bar carried by said lower arch bar and integral therewith, said tie bar having its ends spaced below said end sections, journal boxes between the end sections and tie bar ends, the latter engaging the bottoms of the boxes and extending up along the sides thereof toward the end sections and connected therewith through the tops of the boxes.

14. In an assembly of the character described, the combination of a side frame for car trucks having end sections, upper and lower arch bars between and integral with said end sections, and a tie bar carried by said lower arch bar and integral therewith,

said tie bar having its ends spaced below said end sections, journal boxes between the end sections and tie bar ends, the latter engaging the bottoms of the boxes and extending up along the sides thereof toward the end sections, said boxes being secured to said end sections and tie bar ends by having the tops of the boxes cast to the same.

15. In an assembly of the character described, the combination of a side frame for car trucks having end sections, upper and lower arch bars between and integral with said end sections, a tie bar carried by the lower arch bar with its ends extending to and spaced below the end sections. and journal boxes between the tie bar ends and end sections, said tie bar being divided at its ends and engaging the journal boxes on opposite sides thereof and connected with the end sections of the frame at the tops of said boxes.

16. In an assembly 01 the character described, the combination of a side frame for car trucks and having end sections, upper and lower arch bars between and integral with said end sections, journal boxes se cured to said end sections by having their tops cast thereto. and a center structure between the arch bars and cast thereto.

In testimony that I claim the foregoing as my invention, 1 aHix my signature this 4th day of February, 1924.

ALVIN C. MoCORD.