US1629307A - Draft gear - Google Patents

Description

Patented May 17, 1927.

UNITED STATES PATENT OFFICE.

WILLIAM J. REGAN, or PITTSBURGH, PENNSYLVANIA, ASSIGNOR-TO 'rrrEMccoNwAY & TORLEY COMPANY, or rrrrsmmen, PENNSYLVANIA, A coaroa 'rioN or PENN- SYLVANIA.

DRAFT GEAR.

Application filed May 9,

My invention relates to draft gear for railway cars and has for its object to provide cessed or bifurcated rear end extending be tween said arms, a follower having a forwardly extending slotted tongue disposed in interleaved relation to the bifurcated end of the coupler, and a pin passing through the yoke device, coupler and follower, the pin being so related to the follower tongue that Q itis in double shear at the beginning of a draft movement of the coupler and in quad-- ruple shear at the end of such draft movement.

A further feature of the invention consists in constructing a draft gear with a yoke device having a friction casing and a plu-. rality of slotted arms integrally united to said casing and extending forwardly therefrom, and in combining therewith a car coupler whose rear end is received between the arms, a follower movably, mounted between said arms in advance of the casing and having a forwardly extending projection provided with a curved bearing face. and means for pivotally connecting the coupler and said yoke device, the rear end of said coupler being curved curved bearing face upon the follower.

Other features of. invention, residing in particular combinations of parts and details of construction will hereinafter appear and be pointed out in the claims. In the drawings illustrating the preferred form of the invention,

Figure 1 is a plan view of draft gear embodying the invention showingits relation to the stationary parts of the car with which it is associated.

Figure 2 is a view partly in side elevation and partly in vertical section of the construction shown in Fig. 1.

Figure 3 is a horizontal central section of a portion of the device.

and adapted to engage the 1923. Serial No. 637,807

yoke device with which it is associated. This yoke device, which is most advantageously formed as an integral casting, is preferably constructed wth a hollow casing. portion 3 made of any desired size or form suitable for receiving and cooperating with springs and friction elements housed thereby, the draft gear members that are located within the casing and which are operatively interposed bctween the rear end of the latter and transverse section the longitudinally'movable follower t being diagrammatically indicated by the diagonally 1 extending dotted lines 5 in'a conventional manner. A Integrally united to said casing tending forwardly therefrom are a pair of yoke arms 6 adapted to overlap therear end of the coupler 1 on opposite sides there;v

of. The arms are respectively rovided with apertures 7 for receiving the pin 8 by which the car coupler is connected. to the yoke device, the said apertures preferably being in the form of slots permitting the said pin to travel rearwardly therein when the coupler is subjected to buffing in service and,

the said pin preferably constituting a pivot-w The arms 6 may advantageously be integral-'- ly united at their forward ends on opposite or walls 9, thus providing in conjunction with the said arms 6 a forwardly flaring recess adapted to receive the rear endof the car coupler and permit lateral swinging thereof. a

The inner end of the coupler 1 is bifurcated to forma rearwardly opening recess 10 for receiving a-tongue 11 with which the sides by forwardly diverging tie members 1 stem 1, the said projection being fashioned at its outer end upon opposite sides of the follower tongue 11 with curved-bearing surfaces or seats 15 which are respectively adapted to cooperate with the correspondingly curved bearing faces 13 of the coupler. The tongue 11 which is integrally united to the follower 4 projects forwardly beyond the butting bearings 15 and enters the recess 10 at the rear end of the coupler stem, thus being associated with the said stem in interleaved relation. The tongue 11 is provided with a longitudinally extending slot 16 through which the pivot pin 8 passes, the said slot being of such length that the pivot pin 8. reaches the end vthereof and communicates draft strains to the follower 4 when the coupler 1 is pulled forward in draft to or substantially to the limit of draft gear movement. During a bufling movement the coupler and follower move rearwardlytogether and the pivot pin 8-does not slide in the slot 16 of the follower tongue, but during said movement the pivot pin slides rearwardly in the slots 7 of the yoke arms 6, thus permitting the coupler and its abutting follower to move rearwardly with respect to the yokedevice. The laterally project-ing ends of the follower 4 respectively cooperate with suitable follower stops 17 which are'rigidly secured to the center sills 'or draft sills 18 of the car. These follower stops form abutments for preventing forward movement of the follower when the coupler is pulled out in draft. Rearward movement of the yoke device 2 in butting is preferably prevented by .a back stop member or abutment 19 extending between and secured to the sills 18 and adapted to engage the rear end ofthe casing portion 3 of the said voke device. The

follower stops 17 and the back stop 19 are preferably integrally united to form a unitary draft casting by means of bars or plates 20 which may closely border the casing 3 of, the yoke deviceso as to maintain the position and operative alinelnent of the latter. p v

The pivot pin or tail pin 8 is preferably inserted'from below and may advantageously be supported by a bolt 21 runnin'g lengthwise of the yoke device and passing through perforated lugs 22 which are preferably cast integral with the lower yoke arm 6 of the yoke device. A cotter 23 serves to retain the bolt 21 in assembled position.

In bufiing the coupler 1 forces the follower 4 rearwardly while the yoke device,

which bears at its rear end against the back and the yoke device is drawn forward with the coupler, thus again actuating the cushioning elements interposed between the follower and the yoke device. At the beginning of the draft movement of the coupler 1 the pivot pin 8 travels forwardly in the slot 16 of the follower tongue 11 and the pin acts in double shcarythe shearing sections thereof being in the planespassing between the stem of the coupler and the yoke arms 6. But when the coupler has been pulled forward to the limit of draft gear movement or nearly so,the central portion of the pivot pin 8 pulls against the follower tongue 11 and thus calls into play two addi tional shearing areas of the pin, thereby placing the pin in quadruple shear and transmitting an uncushioned portion of the draft strain to the draft-lugs or follower" stops 17 directly through the follower 4. By this means the strength ofthe pivotal connection of the coupler to the yoke device is greatly enhanced to resist maximum strains. 7 I y My invention renders it practicable to provide a draft gear with a combined draft yoke and friction casing formed as an integral casting. Vithin the limits of space allowed in car construction the friction'cas ing may be made of comparatively great device and adapted to be actuated by and to be movable with respect to a car coupler associated therewith, and means extending ,through said follower for connecting the coupler to said yoke device, a portion of said coupler being adapted to be interposed between said follower and said yoke device.

2. A draft gear involving a yoke device. a follower'movable with respect to said yoke device and adapted tobe actuated by'a car coupler associated therewith, said coupler having a bifurcated rear end, and means extending through said followerfor movably connecting said yoke device to the coupler,

I said follower having a slotted'tongue adapted to project into the bifurcated end of said coupler and through which said means ex tends.

3. A draft gear involving a yoke device, a follower adapted to be actuated by a car coupler ,upon a buiiing movement thereof, and means interposed between and slidably connecting said follower and coupler for causing uncushioned draft strains to be transmitted to said follower from sa1d coupler after a predetermined movement of said coupler. v

4. A draft-gear involving a yoke device, av follower movable with respect to said yoke, a car coupler, and; a pin connecting said yoke device, follower and coupler, said fol lower being provided with an elongated slot for receiving said pint-o permit the latter to move at predetermined distance with re .spect to said follower in the direction of draft movement of the coupler.

a a simultaneously movable in the slots of said.

5. A draft gear involving a yoke device having. a plurality of slotted arms, a car coupler extending between said arms. a folarms and? in said follower slot.

, opening recess,

6. A draft gear involving a yoke device having 'a plurality of slotted arms,- acoupler having a stem provided with a rearwardly a follower having a slotted tongueextending into said recess, and a pivot pin passing through said coupler and the slot of said tongue and having hrough its oppos1te-ends projecting into. the slots of 'said arms. V

"TI-H7; A draft gear involving a yoke device having a pluarilty of arms adapted to receive a car coupler between them. a car coupler having a stem provided with a rearwardly opening recess, afollower having a slotted tongue extending into said recess,

and a pivot pin passing through said slot for'pivotallv'connecting said coupler to said f a I- I I follower and said-arms, said pm bemg movable in; saidislot a;;predetermined distance when the "cou 'aler is subjectedto draft.

8. A draft gear involving a yoke device, a

a slotted tongue throughfwhich said pin ex e tends and having on oppositesides of -tongue curved shoulders adapted to forin follower, a car coupler adapted to mqve said follower in bufiing, and a pin for p votally connectingfsaid coupler, yoke device and follower, said'follower being provided with portions of said coupler, and said' buffing bearings for the rear, end of said coupler.

9. A draft gear involving a yoke device having a-forwardly flaring recess adapted to receive the rear end of a car'coupler, a follower, a cal-[coupler extending into said recess and adapted to actuate said follower in bufling, and a pinfor pivotally connecting said yoke device and coupler; said coupler and follower being provided with interleaved portions through which said pin extends.

10.- A draft gear involving a yokedevice, a car coupler, a follower movable with respect to said yoke device and adapted to be actuated by said coupler in butting. and a pin operatively associated with said coupler,

voke device and follower, said pin being adapted to afford greater shearing area'to resist draft strains at the end of a draft movement of the coupler than at the beginning ofsuch draft movement a 11. A draft gear involving a yoke device provided with arms adapted to receive the rear end of a car coupler'betweenthem, a car coupler having a bifurcated rear end extending between said arms, a follower having a slotted tonguedisposed in interleaved relation to the bifurcatedend of saidcoupler, and a pin extending through said voke device, coupler and follower, said pin at the beginning of a draft movement of 1' said coupler being in'double shear and at the end of the draft movement of said coupler .being in quadruple shear;

12. A draft gear involving a yoke device ..having a friction casing and a plurality of' 1 arms integrally connected to said casing and extending forwardly therefrom and adapted to receive the rear end of a car coupler between them, a follower movably mounted between said arms in advance of said casing,

tie members spaced from the forward end of said casmg and integrally unit ng said arms, and means for connecting said yoke device and coupler, said follower being provided Y with: a forwardly extending projection formmg a butting bearing for said coupler and having in advance of said bufling bearing a I tringue adapted to be connected-to a car ooner.

13. A draft gear involving a yoke device having a friction casing and a plurality of arms integrally united to said, casing and extend ng forwardly therefrom and adapted jto receive the. rear end of a car couplervbetweeii them, a follower movably mounted betweeusaid arms-in advance of said casing and having a forwardly-extending projection provided with a forwardly facing curved surface and also having a'tongue extending forwardly from said curved surface, a car coupler adapted to be connected to said tongue and having a curved bearing face at its 'rear end adapted to cooperate with the curved surface, oft said follower, and means for plvotally connecting said coupler and aldyoke device.

' 14. A draft gear involving a yoke device,

' a car coupler, a follower movable with respect to said voke and adapted to be actuated by said coupl er in bulfing, and a pin adapted to communicate draft force from said couler to said yoke and follower, said pin bemg adapted to operate in double shear and also in quadruple shear.

15. A draft gear involving a yoke device,

a car coupler, a follower movable with respect to said yoke and adaptedto be actu-' ated by said coupler in buffing, and means mo'vably connecting said coupler and fol- \VILLIAM J. REGAN.

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