US1072146A - Draft-rigging. - Google Patents

Description

G. B. MORSBERGER.

DRAFT RIGGING.

APPLICATION FILED 0GT.15, 1912.

Patented Sept. 2, 1913.

ATTORNEYS COLUMIHA I LANrmu/um Cn,,wAsu|NriTnN. n, c,

UNTTED dTATltid PATENT @FFTCE.

GEORGE BENARD MOESBERGEB, OF BALTIMORE, MARYLAND.

DRAZET-RIGGING.

itatentcd Sept. 2,1913.

To (all whom it may concern.

Be it known that I, Gnonun BnNAuo Monsnnnenn, a citizen of the United States, and a resident of the city of Baltimore and State of Maryland, have made certain new and useful Improvements in Draft-Rigging, of which the following is a specification.

My invention relates to draft rigging of the kind used upon railway cars for the purpose of distributing strains due to abrupt changes in the tension of the draw-bar.

More particularly stated my invention comprehends a draw-bar so arranged that when in its normal or inactive posit-ion it is subjected to the tension of a spring, and when in active use for pulling cars the tension upon the spring just mentioned is increased, and when the pull upon the drawbar is excessive a portion of the strain is thrown upon additional or reserve springs.

My invent-ion further comprehends various improvements relating to mechanism of this type for the purpose of increasing the lgeneral etliciency thereof.

Reference is made to the accompanying drawings forming a part of this specification and in which like letters indicate like parts.

Figure 1 is a plan view of my improved draft rigging as it appears when subjected to excessive tension certain parts being broken away for purposes of illustration. Fig. 2 is a longitudinal vertical section through the mechanism shown in Fig. 1 and is taken upon the line 22 of said figure looking in the direction of the arrow. Fig. 3 is a section on the line 3-3 of Fig. 1 looking in the direction of the arrow. Fig. 4 is a vertical cross section on the line H of Fig. 1 looking in the direction of the arrow.

The draw-frame is shown at 5 and is pro vided with a buffer beam 6 forming one end of the frame. Mounted within the frame and secured rigidly to the opposite sides thereof are guide beams 7 which in this instance are made hollow and constructed of metal. Each guide beam 7 is provided with a slot 8 the two slots of the two guide beams facing each other. The draw head is shown at 9 and is carried by the draw-bar 10. This draw-bar is provided with a yoke 11 of massive size and having considerable strength. This yoke is provided with a slot 12 of substantially the same length as either of the slots 8. Mounted within the draw-frame 5 and secured to the opposite sides thereof are two brackets 13 made of metal and provided with shoulders 14 integral with them. Each bracket 13 is provided with a slot 15, the two slots being disposed opposite each other in relation to the draw-frame. A tension bar 16 extends practically across from one side of the frame to the other, the end of the tension bar extending through the slot 15. Springs 17 which rest against the shoulders 14 engage the ends of the tension bar and normally force this bar to the left according to Fig. 1, so that one edge of the bar rests against abutting portions 18 of the bracket 13, these abutting portions thus constituting limiting stops for preventing excessive travel of the tension bar in one direction of its movement.

Extending loosely through the opening 12 of the yoke it are two cross bars 19 and 20 and exteni'ling from one of these cross bars to the other is a powerful compression spring 21, the tendency of which is to force. cross bars 19 and 20 apart. Vixen the various parts are in their respective idle or normal positions the cross bars 19 and 20 are at the extremities of the slots 8. The draw-bar 10 carries a shoulder 22 in horizontal. alinement with a portion of the tension bar 16. hen the parts are in their normal or inactive positions the shoulder 22 is removed a little distance away from the tension bar 11.6, but when there is a pull upon the draw-bar, as when the latter is used for pulling rolling stock, the shoulder 22 nears the tension bar 16 and if the pull upon the drau lmr be sulliciontly great the shoulder 22 rests against the tension bar 16. If now for any reason the pull upon the draw bar he still further increased the pressure of the shoulder 29 against the tension bar 16 moves this bar outward-Aphat is to the right according to Fig. 1 and so that the springs 17 are now compressed to a degree commensurate with the strain upon them. During this time the compression of the spring 21 is still further increased.

The operation of my device is as follows: As the car is pulled along by aid of the draw-head 9 the various movable parts above described take up positions which are varied relatively to other parts by the degree of strain or tension upon the drawbar. If the load be light or for any reason the draw-bar pull be of less degree than usual, the tension exerted upon the drawbar is taken up by the spring 21. 1f, however the pull upon the draw-bar becomes excessive the strain is distributed somewhat difierently. The spring 21 is compressed further in consequence of the exeessive strain upon it, and after the strain reaches a predetermined maximum so that the shoulder 22 lodges against the tension bar 16 and moves this bar, a portion of the excessive strain is thrown upon the springs 17. 'l Vith excessive pull upon the draw: bar therefore the strain is divided into three factors each of which is resisted by one of the springs 17, 1 7 -21. Suppose now that in backing the train the direction of; strain upon the draw-bar 10 is reversed:- that is to say, the draw-bar is subjected to a pushing rather than to a pulling action. The draw-bar now slid-es freely through the tension bar 16 and moves the .cross bar -20; to the left according to Fig. 1. This com: presses the spring 21 but no effect is pro-i duced upon the springs 117.

I do not limit myself to the precise con: struction shown as variations may h made therein Without departing from the spirit of my invention.

Having thus described my invention What I claim as new and desire to secure byLet ters Patent is as follows:

1. A draft rigging comprising a draw frame, guide-bars connected therewith and provided With slots, a draw-bar extending into said draw frame and provided with a 3 yoke, cross bars extending through saidj yoke and into said slots, said cross bar-s being movable Within said slots, a eompresq sion spring housed Within said yoke and? extending from one of said cross bars to the other for the purpose of normally forcsaid bars apart, a tension bar mounted Within said draw-frame and movable relative-ly to the same, said tension bar being normally idle, means carried by said drawbar controllable by movement thereof in excess of a predetermined movement for 5 engaging said tension bar in order to move the latter, and reserve springs carried by said draw-frame and engaging said tension bar for the purpose of resisting movemen s of said tension bar.

A draft rigging comprising a draw: frame, guide bars c zriiriected therewith and provided with slots, a drambar extending into said dItLWrflLlllQ and provided with yoke, cross hers extending through .Sa y ke and into said s ot compr s i Spring mounted within said yoke an tending from one of said cross bars to other for the purpose of tor, 111g said .cnoss bars apart, a pair of brackets mounted rigidly within said draw framc and provided with slots, springs mounted ithin said brackets, a nsion bar e ten ing through said slots in aid braekets and engaging said springs ad. in said brackets, said tension bar being normally idle said draw beingprovided with portion normally out of engagement with sa d te sion harcapable of engaging said ea Sim bar when .said dl'fi'i moves beyond a predetermined limit relatively to said draw GEORGE BE'NABD 'I'ILQRSBERGER. i/Vitnesses:

WALTON HARRISON, G no, BROOK.

each, addressing the Gommissioner of-Batents, n, a a

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