US698215A - Friction draft-rigging appliance. - Google Patents

Description

Patehted Apr. 22, i902. T. LxMcKl-ZEN.

FRICTION DRAFT RIGGING APPLIANGE,

Application filed Feb. 6, 1902.) (No Model.) I 2 Sheets-Sheet No. 98,215. v Patented Apr. 22, I902.

T. L. MGKEEN. FBICTION DBAFTRIGGING APPLIANCE.

(Application flledFeh. 6,1903.) (Na Model.) 2 Sheets-Shoat 2.

1 u; i v i': F [I A R w k UNITED STATES;

PATENT OFFICE.

THOMAS L. MOKEEN, OF EASTON, PENNSYLVANIA.

FRICTION DRAFT-RIGGING APPLIANCE.

SPECIFICATION forming part of Letters Patent No. 698,215, dated Apri122, 1902.

Application filed February 6, 1902- Serial No. 92 820 (No model.)

T allwhom it may concern:

Be it known that I, THOMAS L. MOKEEN', a citizen of the United States, residing at Easton, in? the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Friction Draft- Rigging Appliances; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and moths. same.

Myinvention relates to'ce'rtain new and usefu'l improvements in draft-rigging for railroad-cars,and particularly'to that class known as friction draft-rigging. It has for its object simplicity and economy of construction, durability of use, and the ready assembly or disassociation of its several parts...

With these ends in viewiny invention consists in the construction and arrangement of parts, as will be hereinafter and in detail explained. a

In order that those skilled in the art to which my invention appertains may know. how to makemy improved 1 draft-rigging and fully understand its operation, I will proceed to describe the same, referring by letters to the accompanying drawings, in Which- Figure 1 is a horizontal jcentral section taken on the liner to of Fig. 3. Fig. 2 is a perspective View of a modified form of one of the boxes for containing the friction-springs. Fig. 3 is a central longitudinal section taken on the line y y of Fig.- 1, and Fig. 4 is a trans- Verse section taken on the line a z of Fig. 1.

Similar letters of reference denote like parts in the several figures of the drawings.

A Aare the ordinary draft-timbers of mailroad-car, to which are secured the housings or check-plates B, which are formed with vertical followerstops or shoulders C at each end and with two follower-stops DD adjacent to the rear end followers 0, as clearly shown at Fig. 1.

E is an end follower located at the forward end and betweenthe housings B B, and F is an end follower located in a similar manner at the rear end. This rear follower E is formed with anintegral central stem G, which .is' secured by a suitable bolt or pin H to a wedge-shaped block or head I, as clearly shown at Figs. 1 and 3.

J J are open-ended and open-top boxes adapted to receive. a series of spring plates or leaves; K,: the ends of which 1 abut, respectively,'against the forward endfollower E and intermediate or central followers L, as shown at Fig.1.

Before passing the arrow-head and stem through the intermediate follower coiled buifing-springs M N are secured in position around the stem G, so that when the intermediate follower is placedin position the springs M N will, as clearly shown, be confined between said follower and'the rear-end follower F.

The adjacent vertical walls of the springboxes J J are tapered and cut away, as clearly shown at Fig. 1, to conform to the design of the arrow-head I. The spring-boxes JJ'and end followers are supportedvertically upon suitable carry-bars O O, secured to the housingsby bolts P P or in anyv other desired manner. 1

Q is the shank of the draw-bar, which abuts against the forward-end follower E, and R is the yoke, which is secured in the usual or any desiredway to the-shank Q. In lieu of making the boxes J with both ends open, as shown in Fig. 1, and employing the intermediate followers L said boxes may be formed with the rear ends closed, asjshown at S, Fig.

2, said1ends constituting intermediate followers and operating in substantially the same manner as the intermediate and separable followers L. I

T isa tubular roller surrounding a horizontal cross-bolt U, which is secured in position to vertical lugs-V, extending from the housings B, as clearly. shown at-Fig. 3. The tubular rollerT constitutes a support for the carry-bars and also serves as a brace or bridge between the vertical lugs V to prevent the housings from moving outwardly or toward each other. As will be clearly understood, the vertical follower-stops D D of the housings are so disposed and located with reference to the longitudinal movement of the end follower F and intermediate followers L (or closed ends S of the spring-boxesJ) as to prevent the setting of the coiled springs M N.

Having described the constructiomof my improved draft-rigging, I will now describe the operation.

With the parts all properly assembled and in normal position, as illustrated at Fig. 1, if a buffing strain is exerted the forward-end follower E is forced rearward, and by reason of the location of the spring-plates K between the same and the intermediate followers L and the location of the spring-boxes J the intermediate followers L L (or closed ends S of the boxes J, as the case maybe) are forced against the coil-springs M N, which are accordingly compressed between such follower and the rear-end follower F, which is held against movement by the end follower-stops O 0. During this movement the inclined portion of the adjacent vertical walls of the spring-boxes J J ride upon the correspondingly-inclined surfaces of the wedge block or head I, which causes the said boxes to travel laterally or away from each other and against the spring-plates K, and thus not only offering a spring resistance to the rearward movement of the draw-bar, but at the same time producing increasing frictional contact between the wedge-block and the spring-boxes, as well as between the spring-plates and the inside faces of the housings B. Simultaneously with this described action the coilsprings M N are compressed between the intermediate followers and the rear end follower F, thus offering additional spring resistance during the pulling strain do not move longitudinally, but are held against such action by the forward-end follower E and vertical stops 0, the frictional action between the spring plates K and inside faces of the housings, as above described, does not take place and onlysuch friction results as ensues from the movements of the several plates upon one another and the wedge block against the spring'boxes during the lateral compressive action. It will be seen from the construction and operation described that the spring-plates K constitute at all times a substantial brace between the forward-end follower E and the intermediate followers L L, (or closed ends S of the boxes J,) so that substantially the entire area thereof is supported and braced and the tendency of the movable parts to wabble or bite is avoided, and hence undue and excessive wear does nottake place. The closed bottom of the boxes J constitute shelves, upon which the spring-plates K are supported and held during the assembling of the parts and at all other times. As clearly shown in the drawings, the end followers E F, stem G, and wedge-block I are cast hollow to secure the necessary degree of tightness without sacrificing strength.

Various changes may be made in the mere details and designs of the several parts-such,

for instance, as the substitution of coiled springs for the spring-platewithout departing from the spirit of my invention, which resides in the generic idea of thelateral platesprings to produce friction and to increase the area of support or bracing of the forward and intermediate followers and axially-arranged springs to cooperate with the friction plate-springs in receiving buffing and pulling strains and means within the several springplates and axially-arranged springs for holding the same in position and compressing the same, as hereinbefore explained.

Having described the construction and operation of my improved draft-rigging, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination with the housings secured to the draft-timbers, and end and intermediate followers located therein, laterallycompressible spring-plates, adapted to move bodily in a longitudinal direction, means for compressing said spring-plates and causing frictional contact with the housings, and springs interposed between the intermediate and the rear-end follower, substantially as and for the purpose set forth.

2. In combination with the housings secured to the draft-timbers, end and intermediate followers located therein, and laterallycompressible and longitudinally-movable spring-plates, means for compressing the laterally-located spriug plates,axially-arranged coil-springs between the intermediate follower, and the rear-end follower, and means for moving the end followers, substantially as and for the purpose set forth.

3. In combination with the housings sccured to the draft-timbers and end and intermediate followers located therein, laterallycompressible spring-plates mounted in closed bottomed lateral] y-movable supporting-boxes having their adjacent vertical faces beveled rearwardly, carry-bars secured to the housings and supporting the boxes, and a longitudinally-movable push-bar formed with a beveled forward terminal for spreading the boxes, and means for reciprocating the pushbar, and spring-supporting boxes, substantially as and for the purpose set forth.

4. In a draft-rigging such as described and provided with laterally-compressible spring plates supported in movable boxes, and longitudinally-compressible coil-springs; a forward-end movable partition or follower, and followers intermediate of the spring-plates and coil-springs, a rear-end follower having a central stem for supporting the coil-springs, and having its forward terminal adapted to spread apart the spring plate supporting boxes, substantially as hereinbefore set forth.

5. In a draft-rigging such as described, the laterally and longitudinally movable springplate-supporting boxes, open on oneend, top and on one side, and having the rear end closed to constitute an intermediate follower, substantially as and for the purpose set forth.

6. In a draft-rigging such as described and embodying longitudinally-movable end followers, and intermediate follower and laterally-movable spring-supporting boxes between the forwardend follower, and the intermediate follower, flat spring-plates located within the supporting-boxes and having their ends abutting respectively against the said followers, and constituting braces between said followers, and coil-springs between the rear-end follower and the intermediate follower, substantially as and for the purpose set forth.

7. In a draft-rigging such as described, the rear-end follower F formed with an axial stem G, and separable wedge-block I, connected by a removable bolt or pin H, substantially as hereinbefore set forth.

THOMAS L. MCKEEN;

Witnesses a H. D. MAXWELL, J. WHIT. W001).

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