US826171A - Friction draft-gear. - Google Patents

Description

PATENTED JULY 17, 1906.

G. 1. KING. FRICTION DRAFT GEAR.

APPLICATION FILED MAR. 10. 1906.

2 SHEETSSHEBT l.

. ARI/A222 A. W A Allml F No. 826,171. PATENTED JULY 17, 1906. G. I. KING.

FRICTION DRAFT GEAR.

APPLICATION FILED MAB.10.1906.

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friction draft-gear.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented July 17, 1906. I

Application filed March 1O 1906. Serial No. 305,283.

To all whom, it may concern.-

Be it known that I, GEORGE I. KING, a citizen of the United States, residing at Mid dletown', Dauphin county, Pennsylvania, have invented a certain new and useful Improvement in Friction Draft-Gear, of which thefollowing is afull, clear, and exact description, such as will enable others skilled in the art to which. it appertains to make and use the same, reference being had to the accomanying drawings, forming part of this specication, in which- Figure 1 is a plan View of my improved Fig. 2 is a vertical sectional view of the-same. Fig. 3 is a cross sectional view of the same; andqFig. 4 is a view similar to Fig. 1, showing a modified form of my invention.

This invention relates to a new and useful improvement in friction draft-gear, the ob j ect being to reduce the number of arts and simplify the construction, so that tie device may be cheaply made, easily assembled, and readily repaired in the event of breakage or disarrangement of any of the parts.

In the drawings, 1 indicates the draft-sills of the car-frame, here shown in the form of channels, and 2 represents the cheek-plates secured to the draft-sills, said cheek-plates having abutments 3 at their ends with which cooperate the follower parts of the draft- 4 is the coupler-shank, and 5 is the yoke thereof.

6 is a friction-follower in the form of an o en-ended box, the open end being presente forwardly, said box being embraced by a yoke affording a bearing therefor under pulling strains, between the cheek-plates, the inner side walls thereof being formed tapered and preferably corrugated, as shown, for the purpose of increasing the frictional area thereof.

7 represents longitudinally-movable friction-blocks having outer inclined faces which cooperate with the inclined faces of box 6. These friction-blocks 7 are substantially wedge-shaped, their forward ends under pulling strains abutting a ainstiorward abutments on the cheek-p ates and said blocks under buffing strains being pushed by the rear end of the draw-bar and moved rearwardly along the friction-faces of the box 6, as is well understood.

8 is a spring or set of springs interposed between t e blocks 7.

This box is slidingly mounted- The operation of my improved friction draft-gear is apparent from the drawings, the 5 box 6 under pulling strains moving'forward and compressing the spring 8, the blocks 7 moving rearwardly under buffing strains and compressing said springs 8, the frictionl faces between said moving parts cooperating to cushion shocks or ars and increase the resistance of the movement of the parts, thus enabling the use of lighter sprin s than is possible in a straight spring or tan em draftgear or with equally heavy springs, affording By locating the block 7 only partially within the box 6, which is the normal position of the parts when at rest and in which it will be ing strains the box 6 is, telescoped over the blocks 7 or the blocks 7 area telescoped within the box 6, such telescoping action increasing the'frictional engaging area between the parts, so as to increase'the frictional resistance as the bufiing and ulling strains are increased.

This increaseo --'-frict1onal resistance is assisted materially by compression of the springs 8, said springs becoming stiffer as the b oaks 7 move in the box 6.

In Fig. 4 I have shown a slightly different form of my invention in which a compressionspring 9 and amember 10 are interposed between the end .of the yoke 5 and the rear end of the box 6. 1 This member 10 may beeither in the form'of an open yoke, as herein shown, or in the form of a sleeve which surrounds the spring 9. Under pulling strains the spring 9 will be first compressed and then the 10 will be moved into engagement with the friction-follower '6 by the forward of the draw-bar. Under. bufling strains the rearward movement of the draw-bar. will cause the spring 9 to be first compressed and the friction-follower 6 will then come into engagement with the member 10, which normally en ages the rear abutment 3.

While% have shown the spring 9 arranged back of the friction-gear in the modificatlon shown in Fig. 4-, it will be obvious that said 1 spring could be arranged in front of the friction-gear immediately behind the draw-bar without departing from the scope of my invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is

1. In a friction draftgear, the combination with a friction-follower in the form of an I greater resistance.

position the springs 8 are expanded,

member obvious that under pulling and buifmovement engaging the ing therewith and normally arrap be partly within open-ended box, of friction-blocks cooperated so as to said box, a drawar having a portion with which said friction-blocks contact, and cheek-plates rovided withabutments which said bloc s engage when the arts are in normal position, substantially as described. I t 2. In a friction draft-gear, the combination with a follower provided-with a recess, cheek-plates provided with abutments of friction-blocks artly within said recess and a utments of the cheek-plates when the partsare in normal position, said blocks entering said-recess under pulling and buffing strains; substantiallyas described.

3. In a friction draft-gear, the combination with a friction-follower having a corrugated tapering walls connected together, of frictionblocks cooperating with said walls in such manner that under pulling and bufiing strains the .frictional area of 'icontacti increases as the pulling and buffing strains increase,

a spring interposed between said blocks, and

stationary abutments which said blocks engagewhen the parts are in normal position;

substantially as described.

4. In a friction draft-gear,

\ tion with a friction-follower inthe form of an o en-end'ed-box, friction-blocks cooperating t erewith and normally arranged so as to be partly within said box, a coup er sh'ank provided with a yoke, and a spring interposed between the closed end of sald yoke and the friction-follower substantially as described.

5.'In a friction draft-gear, the combination with afollower' provlded with arecess,

the combina.

of friction-blocks partly within said recess when-the arts are 1n normal position, a drawbar provi ed with a yoke, a spring interposed 40 between said yoke and follower, and a member ada ted to engage said follower after said spring as been compressed by the forward movement of the draw-bar yoke; substantially as described. I

6. In a friction draftear, the combination with rigid follower-a utments, of a friction-follower compressing a plurality of blocks which normally engage the forward abutments, a cooperating friction-follower rovided with a recess for receivingz-said blocks, a member normally engaging the rearward follower-abutments, a spring arranged between said member and the recessed; 01- lower, and a draw-bar rovided with a yoke within which said member and said-frictionfollowers' are-located; substantially ass-described.

7. In tion with friction members comprising-'aifo lower in the form of'an o en endedbox, blocks cooperatin -therewit and normally arranged 'so asto e partly within said, box, means for actuating said friction-members, and a spring arranged between-saidmeans and one of said friction members substantially as described.

In testimon whereof. I hereunto affix: my signature, in t e presence of twot witnesses, this 5th'day of March, 1906.

GEORGE I. KING. Witnesses:

WM. A. CROLL. A; MARsHALL.

a friction "draft-gear, the: combinsi- V

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