US761795A - Double-spring friction draft-rigging. - Google Patents

Description

No. 761,795. I PATENTED JUNE 7, 1904..

M P. B. TOWNSEND.

DOUBLE SPRING FRIOTIONDRAPT RIGGING.

APPLIOATION FILED r113. 24. 1904.

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, I 4% ATTORNEY5 No. 761,795. PATENTED JUNE 7,1904.

F. B. TOWNSEND.

DOUBLE SPRING FRICTION ,DRAFTRIGGING.

APPLICATION FILED FEB. 24. 1904.

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WITNESSES.-

UNITED STATES Patented June '7, 1904.

PATENT OFFICE.

FREDERICK B. TOWNSEND, OF CHICAGO, ILLINOIS, ASSIGNOR TO W. H. MINER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DOUBLE-SPRING FRICTION DRAFT-.RIGGING.

SPECIFICATION forming part of Letters Patent No. 761,795, dat d une '7, 1904. Application filed February 24., 1904. Serial No. 195,040. (NoinodeL) To all whom, it may concern.-

- BeitknownthatI,FEEDEEIoKB.TowNsEND, a citizen of the United States, residingin Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Double-Spring Friction Draft-Rigging, of which the following is a specification.

My invention relates to friction spring draft-rigging for railway-cars.

The object of my invention is to provide a friction draft-rigging of a strong, simple, efficient, and durable construction, composed of few parts and having a very powerful directacting spring resistance in connection witha frictional resistance without undulyincreasing the length of the draft-rigging as a whole resultthat is to say, it consists, in connection" with a draw-bar and draw-bar yoke or extension secured thereto, apair ofside plates or stopcastings secured to the center sills or framework of the car, and a pair of followers fitting between the upper and lower limbs of the draw-bar extension or yoke, of a longitudinally-sliding laterally-oblong friction-shell havinga closed rear end abutting against the rear follower and adapted to be alternately moved with the draw-bar by one'follower and held stationary by the other follower, two parallel longitudinally arranged springs fiting side by side within said laterally-oblong friction-shell, a pair of oppositely-disposed laterally-oblong wedges, one bearing against the front follower and the other against thetwo parallel springs, a pair of wide laterally-oblong longitudinally-sliding friction-blocks having exterior friction-faces bearing against the upper and lower wide interior friction-faces of said friction-shell, and a pair of longitudinally-sliding narrow friction-blocks having upright exterior friction-faces in sliding frictional engagement with the narrow upright interior friction-faces of said longitudinally-sliding friction-shell. The laterally-oblong longitudinally-sliding friction-shell, by reason of its laterally-extended fiat bearing against the follower at its rear end and the cooperative action of the friction-blocks, wedges, and follower at its opposite end, operates to equalize any difference of tension and resistance in the two parallel springs, and thus to prevent any improper tilting of the draw-bar or diagonal or twisting strain on the draft-rigging.

My invention also consists in'the novel con: struction of parts and devices and in the novel combinations of parts and devices herein shown or described.

In the accompanying drawings, which form a part of this specification, Figure 1 is a central vertical longitudinal section of a friction draft-rigging embodying my invention. Fig. 2 is a plan view, partly in horizontal section, on line 2 2 of Fig. 1. Fig. 3 is across-section on line 3-3 of Fig. 2. Fig. i is a detail perspective View of one of the two wide longitudinally-sliding frictionblocks. Fig. 5 is a crosssection on line 5 5 of Fig. 2. Fig. 6 is a detail elevation, and Fig. 7 is a detail front view, of' one of the wedges.

' In the drawings, A A represent center sills or longitudinal frame pieces of the car, A the cross-sill, and A the carry-iron.

B is the coupler, B the draw-bar, and B the draw-bar extension or yoke rigidly secured to the draw-bar by the bolts or rivets Z) and inter-engaging shoulders Z) 6 C C are the followers, and D D are the side plates or stop-castings, each having a front stop d and a rear stop (Z to engage the followers and hold the same alternately stationary. A A by bolts or rivets d The sills A are represented as being of an ordinary steel carfrarne construction. The side plates or stopeastings D have each an integralupper guide or flange d for the followers and also a lower removable guide (Z secured thereto by bolts (Z having threaded nuts (Z E E are apair of parallel longitudinally-ar- The side plates are secured to the sills ranged springs, the same preferably having small springs 0 inside the same.

F is a longitudinally-sliding laterally-oblong friction shell or case having a closed rear end f abutting directly against the rear follower C and fitting between the upper and lower limbs or members of the draw-bar extension or yoke B The sliding friction-shell F has an externally-projecting rim f", furnished with a notch or recess f to receive the upper limb or member of the draw-bar yoke B and thus cause the yoke itself to center or guide the friction-shell or hold the yoke and shell centrally in relation to each other. he parallel side-by-side springs E c and E e fit inside the laterally-oblong friction-shell and at their rear ends bear directly against the closed end f of the shell. The laterally-oblong friction-shell F has at its front end or portion two wide horizontal interior frictionfacesf and two narrow upright friction-faces f", all of the friction-faces being in planes parallel to the line of draft. The friction-faces f f preferably have inserted wearing-plates f so that they can be replaced or removed when worn and so that the wearing-faces may be of adifferent material, if desired, from the friction-faces of the sliding friction-blocks H H. Inside the laterally-oblong sliding friction-shell E there are two laterally-oblong sliding friction-blocks H H, having exterior horizontal friction-faces it h in sliding frictional engagement with the corresponding horizontal friction-faces f of the shell F, and two narrow longitudinallysliding frictionblocks H H, having exterior upright friction-faces it h in sliding frictional engagement with the corresponding upright interior friction-faces f 0f the friction-shell F. Each of the sliding friction-blocks H H has at each end thereof an inclined or wedging face If, contacting with the corresponding inclined or wedging faces g of the two oppositely-disposed laterally-oblong wedges GG". Each of the wedges Gr G has four inclined or wedging faces g, one for each of the frictionblocks H H. The rear laterally-oblong wedge G bears against the front ends of the two parallel springs E E, and the front laterally-oblong wedge G bears against the front follower C, beinginterposed between said follower and the friction-blocks H H.

In buffing the front follower and the wedges Gr Gr and. friction-blocks H H move with the draw-bar, while the rear follower and friction-shell F are held stationary by the rear stops of the side plates or stop-castings E. In pulling the action is the reverse, the rear follower and friction-shell F moving with the draw-bar and the front follower, wedges, and friction-blocks being held stationary by the front stops on the side plates or stop-castings.

I claim 1. In a friction draft-rigging the combination with a draw-bar and d raw-bar extension or yoke, of side plates or stop-castings, two parallel longitudinally-arranged springs,alatorally-oblong, longitudinally-sliding frictionshell having two wide and two narrow interior friction-faces, two laterally-oblong and.

two narrow longitudinally -sliding frictionblocks having exterior friction-faces in sliding frictional engagement with the interior friction-faces of said shell, and furnished each with an inclined or wedging face at each end thereof, and a pair of oppositely-disposed laterally-oblong wedges, substantially as speci- Iied.

2. In a friction draft-rigging the eombination with a draw-bar and dra\\'-bar extension or yoke, of side plates or stop-castings, two parallel, longitudinally-arranged springs, a laterally-oblong, longitudinally-sliding friction-shell having two wide and two narrow interior friction-faces, two laterally-oblong and two narrow longitudinally-sliding frictionblocks having exterior friction-faces in sliding frictional engagement with the interior friction-faces of said shell, and furnished each with an inclined or wedging face at each end thereof, and a pair of oppositely-disposed oblong wedges, said friction-shell having an external recess or notch to receive one limb of the draw-bar extension or yoke, to cause the laterally-oblongfriction-shell to be maintained centrally of the draw-bar extension, substantially as specified.

3. In a friction draft-rigging the eonibiinttion with a draw-bar, draw-bar extension, side plates and followers, of a laterally-ol)lon g, longitudinally-sliding friction -shell, longitudinally-sliding friction-blocksinside the shell, a pair of longitudinally-extending springs arranged side by side within said shell, and a. wedge for causing said friction-blocks to be forcibly pressed and held in sliding frictional engagement with said shell, substantially as specified.

a. In a friction draft-rigging, the combination with a draw-bar and draw-bar extension or yoke, of side plates or stop-castings, two parallel longitudinally-arranged springs, a laterally-oblong, longitudinally-sliding frictionshell havingtwo wide and two narrow interior friction -faces, two laterally-oblong and two narrow longitudinally-sliding frictiondiloeks having exterior friction-faces in sliding fric tional engagement with the interior frictionfaces of said shell, and furnished each with an inclined or wedging face at each end thereof, and a pair of oppositely-disposeil, laterallyoblong wedges, said friction-shell having a closed rear end against which one end of the springs bear, substantially as specified.

5. In a friction draft-rigging the combination with a draw-bar, draw-bar extension, side plates and followers, of a laterally-ol ilong longitudinally-sliding friction shell having one closed end bearing against one of the followin sliding frictional engagement with said ers and againlst WlllCfil 011116 end1 of the two shell, substantially as specified. springs bear, ongitu ina y-si ing frictionblocks inside the shell, a pair of longitudi- FREDERICK nally-extending springs arranged side by side Witnesses: Within said shell, and awedge for causing said H. M. MUNDAY, friction-blocks to be forcibly pressed and held WILLIAM A. GEIGER.

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