US2696998A

US2696998A - Brake rod jaw

Info

Publication number: US2696998A
Application number: US147348A
Authority: US
Inventors: Stanley M Roby
Original assignee: ACF Industries Inc
Current assignee: ACF Industries Inc
Priority date: 1950-03-03
Filing date: 1950-03-03
Publication date: 1954-12-14
Anticipated expiration: 1971-12-14

Description

S. M. ROBY BRAKE ROD JAW Filed March 3, 1950 2 .1W/e 0 3. e me fw Mmmm N R .1 :l T 6 ly/A l 9J e 1111 Il 3 3 an 1. 3 f 3 @M \n(( 1 w E .WA

m 2 2 4 d: f M d 2,696,998 kPatented Dec. 14, 1954 2,696,998 BRAKE ROD JAW lStanley M. Roby, Hazleton, Pa., assignor to ACF Industries, Incorporated, a corporation of New Jersey Application March s, 195o, serial No. 141,348 7 claims.l (ci. 281-100) This invention relates to brake rod jaws.

Brake rod jaws as previously manufactured .have 1nvo1ved`- a large numbery of forging, sawing, straightening and drilling operations which, due to their necessary change to different machines, will' require repeated reheatings. After the jaws are manufactured by present methods they vmust be drilled and after assembly on the lever require the use of a pin and a cotterz as well as a pin retainer which functions to hold the pin 1n place 1n case the cotter is lost during service. It is an object, therefore, of the present invention to provide brake rod jaws which are so formed as to eliminate all pins, cotters and retaining means.

A further object of the invention is the provislon of brake rod jaws which may be manufactured in a single forging operation and without necessity for reheating.

A still further object of the invention isv the provision of brake rod jaws which can be manufactured two halves at a time and by a single forging operation.

A yet further object of the invention is the provision of brake rod jaws which when assembled include no loose parts.

These and other objects of the invention will be apparent to persons skilled in the art from a study of the fololvlving description and accompanying drawings, in w 1c Fig. 1 is a plan view of the inmproved brake rod jaws;

Fig. 2 is an end elevation of the jaws;

Fig. 3 is a plan view of the bottom or rod jaw of Fig. 2;

Figs. 4 and 5 are similar to Fig. 2, but each showing a slight modification of the manner of joining the brake aws;

J Fig. 6 is a sectional view taken substantially on line 6-6 of Fig. 1, but showing a still further modification for retaining the jaws in assembled position;

Fig. 7 is a perspective view showing the jaw members of Fig. l in the assembled position;

Fig. 8 is a view similar to Fig. 2, but showing a still further modification, and

9 is a view taken in the direction of the arrow of Referring now to the drawings in detail it will be seen that the jaws are made up of two parts, one of which may be termed the rod jaw A and the other the loose jaw B. In each of the figures the lowermost jaw has been shown as the rod jaw, whereas the loose jaw has been shown as the uppermost.

In each of the forms the rod jaw A is drop forged so as to form two rod jaws as clearly indicated by full and f "line and dash outline of Fig. 2. After forging the parts r are cut in two so as to produce two elements such as shown in full line. As shown the ends of the forging are rounded as at 2 and inwardly of this rounded portion a boss 4 extends upwardly from the flat surface 6. Inwardly of the 'boss 4 the metal is inclined upwardly as at 8 and has its width decreased as at 9 to merge into a shank portion 10. The shank portion 10 of the forging will be sheared or cut as at 12 to produce the two rod jaws from a single drop forging. Due to the simplicity of the forging the part can be normally made by a single drop of the hammer onto the upset metal blank.

The loose jaw B will; like the rod jaw A, be made at a single drop of the hammer and in pairs which will be severed to produce the jaws as shown in full outline. This loose jaw will have a rounded end portion 14 and a boss 16 projecting from the iiat surface 18 inwardly from the rounded end 14. From the flat surface the metal will incline downwardly as at 20 and will have its width decreased as at 22. In the form shown in Figs. l to 7 inclusive a slot 24 will be punched in the inclined portion 20 and this slot will be of the proper width and length as to be slid over the shank portion 10 of the rod jaw previously described.

After the loose jaw B has been slid over the shank 10 the surface 12 can be liash welded or otherwise fastened to brake rod 30 (Fig. 7 When it is desired to attach the rod to the brake lever or similar member 32, the boss 4 of the rod jaw A will be engaged in the hole in the ybrake lever 32, then the loose jaw B will be slid along the shank and its boss 16 forced into the upper half of the hole in lever 32. With the parts held in this position weld metal 40 is deposited between the ends of inclined portion 20 of the loose jaw and the shank 10 of the rod jaw as clearly shown in Fig. 2. With the parts assembled as just described there are no loose parts and the pull on the brake rod will tend to tighten the jaws, thereby assisting the weld metal in retaining the parts in assembled form.

In the form shown by Fig. 4 the inclined portions 8 and 20 are inclined more steeply than in that shown in Figs.V 1 to 3, thus permitting'the slot 24 to be of lesser length and in this case the weld metal 42 will be deposited between the 'inclined portion 20 of the loose jaw and the inclined portion 8 of the rod jaw. In the slight modification shown in Fig. 5 a bulge 44 is forged on the inclined portion 8 of the rod jaw and the weld metal 46 is deposited between the inclined shank 20 of the loose jaw and this bulge 44 of the rod jaw. In some cases where shops are not equipped to burn out the weld metal in effecting repairs, it may be desirable to drop forge the jaws A and B with a slight depression so that a rivet 50 may be driven through the

bosses

4 and 16, thus effectively holding the two halves in assembled relation with respect to the lever.

In the form shown in Figs. 8 and 9 the loose jaw has the ends cut off so that the slotted hole 24 becomes an open ended slot, thus permitting the loose jaw B to be slid downwardly onto the inclined portion 8 of the rod jaw and welded to the rod jaw by weld metal S2 deposited between the ends of the loose jaw slot and the shank of the rod jaw.

While the invention has been described more or less in detail with specific reference to the forms shown by the drawings it will be obvious that other forms may be made without departing from the scope of the invention ,as defined bv the following claims.

What is claimed is:

l. In a brake rod jaw, a pair of jaw parts each comprising, a fiat portion. an integral boss extending laterally from one side of the flat portion, and an inclined portion merging into the flat portion, the inclined portion of one jaw part having a slot therein through which the inclined portion of the other jaw part projects and metal securing the inclined portions of the jaw parts together with the bosses substantially in contact and spacing the at portions.

2. In a brake rod iaw, a pair of jaws parts each comprising, a iiat portion. an integral boss extending laterally from one side of the iiat portion, and an inclined portion merging into the flat portion, one of said inclined portions merging into a rod attaching extension and the other inclined portion being slotted and slidable over the extension, and weld metal securing said inclined portions of the jaw parts together with the bosses substantially in contact and holding the at portions spaced apart.

3. In a brake rod jaw, a pair of jaw parts each comprising, a flat portion, an integral boss extending laterally from one side of the flat portion, and an inclined portion merging into the at portion, one of said jaws having its inclined portion extended and decreased in Width to form a rod attaching extension, and the other jaw having its inclined portion formed intermediate its ends with an opening slidable over and rotatable relative to the rod attaching extension, and means securing said jaw parts together to prevent relative sliding or rotative movements and to hold the flat portions in parallel relation and the bosses substantially in contact.

4. In a brake rod jaw, a pair of jaw parts each cornprising, a at portion, an integral boss extending laterally from one side of the at portion, and an inclined portion merging into the flat portion, one of said jaws having its inclined portion extended and decreased in Width to form a rod attaching extension, and the other jaw having its inclined portion formed intermediate its ends with an open ended slot slidable over the rod attaching extension, and means securing said jaw parts together with the flat portions in parallel relation and the bosses substantially in contact.

5. In a brake rod jaw, a pair of jaw parts each comprising, a at portion, an integral boss extending laterally from one side of the at portion, and an inclined portion merging with the flat portion, one of said inclined portions having a slot through which the other inclined portion projects, and weld metal between and securing together surfaces of the jaw parts adjacent the slot with the bosses substantially in Contact and spacing the at portions.

6. In a brake rod jaw, a pair of jaw parts each comprising, a flat portion, an integral boss extending laterally from one side of the at portion, and an inclined portion merging with the flat portion, one of said inclined portions having a slot through which the other inclined portion projects, and weld metal between and securing adjacent surfaces of the inclined portions together in close proximity to the slot with the bosses substantially in contact and spacing the flat portions.

7. In a brake rod jaw, a pair of jaw parts each comprising, a flat portion, an integral boss extending laterally from one side of the flat portion, and an inclined portion merging with the at portion, one of said inclined portions having a slot therein, through which the other inclined portion projects, and a lat extension extending from its end opposite the flat portion carrying the boss, and weld metal between and securing adjacent surfaces of the projecting inclined portion and the at extension with the bosses substantially in contact and spacing the boss carrying at portions.

References Cited in the tile of this patent UNITED STATES PATENTS Number Name Date 50,880 Osborne Nov. 7, 1865 133,363 Ferris Nov. 26, 1872 141,902 Thomas Aug. 19, 1873 309,203 Clark et al. Dec. 16, 1884 527,864 Lavens Oct. 23, 1894 607,596 Baker July 19, 1898 763,676 Knobbs June 28, 1904 1,874,457 Corey Aug. 30, 1932 1,877,460 Hocher Sept. 13, 1932 1,925,119 Summerhays Sept. 5, 1933 2,101,707 Ewing Dec. 7, 1937 2,305,156 Grubel Dec. l5, 1942 2,438,884 Kropp Mar. 30, 1948 2,581,048 Schaeffer Ian. 1, 1952