US1288970A

US1288970A - Friction-gear for railway draft-riggings.

Info

Publication number: US1288970A
Application number: US15100717A
Authority: US
Inventors: John F O'connor
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-02-26
Filing date: 1917-02-26
Publication date: 1918-12-24
Anticipated expiration: 1935-12-24

Description

s. F. @www FHIGTION GEAR FOR RAILWAY DRAFT RIGGINGS.

AFPLICATAION FIL ED FEB. 26| 19H..y

`w Patented Dee. 24, 1918.4

3 SHEETS-SHEET' 1.

F. OCONNOR.- Y FRICTiN GEAR FOR RAILWAY DRAFT RIQGINGS. APPLIQATIQN FILED FEB. 26. 191,1.

i'm 1 Patented Da/24,1918.

3 SHEETS-SHEET 2.

A ORNEY.

J. F. DICONNOR,

FBICTION GEAR FOR RAILWAY DRAFT RIGGINGS.r

APPLICATION FILED FEB.. 2 6. 191,1.

l ,28831970 IzIIened BenQ-, ISIS.

3 sHEEs-SHEET II `I sarai/rae.

JOHN IF. OCONNR, OF CHCG, IILTINOS, ASSIGMQR T() 'WELLAM H. KEINER. i SHAW?, NEW YEK.

,FRICTION-GEAR FOR RAILWAY DRAETUFGGING. l

mesmo.

peeica'tion of Letters Eatent.

Fatented Bec. 2e, teilt-ti.

To aU whom t may concern Be it known that I, JOHN F. OCosxoa, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Friction-Gears for Railway Draft-Riggings, of which the following is a full, clear, concise, and exact description. reference being had to the aecompanying drawings, forming a part ot this specification. A

This invention relates to improvements in friction gears for railway draft riggings.

One object of the invention is to provide a friction gear for railway drat't rig-gings having high capacity and certain' release and wherein a constant angle wedge is employed.

Another and more specic object of the in venton is to provide a friction gear of the type above indicated wherein is employed a self-contained expanding wedge.

In the drawing forming a. part of this specification, Figure 1 is a longitudinal veri tical section of a draft rigging, showing my improvements in connection therewith. Fig.

2 is a front end elevation of the friction gear proper, on an enlarged scale. Fig. 3 is a vertical transverse section of the friction geur illustrated in Fig. '1 and taken on the line 3-3 thereof. Figs. 4, 5 and 6 are views corresponding respectively to Figs. 1, 2 and 3, but illustrating different embodiments of the invention; Fig. 6 being'taken on the line 6-6 of Fig. 4.

Figs. 7, 8 and 9 are enlarged detail sectional views illustrating three other embodiments of my invention.

Referring first to the construction illustrated in Figs. 1, 2 and 3, l0 denotes a'draw bar to which issecured a yoke 1l, the friction gear proper being confined Within the yoke and between front and

rear followers

12 and 13, said followers cooperating With stops on the draft sills in the usual manner.

My improved friction gear, as shown., comprises, a combined friction shell and. spring casing A within which is confined the main spring 14, consisting oi an outer heavy coil and an inner lighter coil. Coperable with the friction shell proper of the casing A, is a .eircularly arranged series of friction shoes 15, each of the latter having an interior Wedge face 16 at itstorward end and an inwardly extending shoulder 17, against which bears a small spring follower 180, at the front end of the inner coil ot spring. Coperahle with the friction shoes for -iorcing the latter radially against the friction shell, is an improved self-contained expanding wedge. rEhe latter consists ot' a series of outer wedge elements 18, one for each shoe, a central pressure transmitting lug 19 ot wedge shape, and a heavy eapanc ing spring 20 confined within and carried by the wedge ccssed to accommodate 4the releasing spring 20, as clearly shown in l. order to obtain a balanced Spreading pressure on the wedge elements i8, the latter are provided near their inner ends with additional wedge faces 24 with which cooperates conical plug 25 at the inner end of a stud 26 which passes through the spring 20 and is secured to and moves in unison with the pressure plug 19. As au additional means for releasing the wedge, a plurality or" disk springs 2'! are interposed between the inner end ot the. Wedge proper and the spring follower Upon buing movement, 'it is appareir that pressure will he transmitted trom the front follower l2 to the plug 19 and the latter in turn will act directly against the outer ends of the expansible wedge elements i8 and through the plug 25 against the inner ends of the Wedge elements 18. 'tiro-in the Wedge elements l, the pressure is transmit ted to theshoes through the wedge it? and 21, thus maintaining a constant wedge angle between the Wedge proper andy friction shoes. Upon release or removal oi the pressure against the parte, it is apparent that the spring 20 will exert outward pressure on the plug 19* with respect to the Wedge elements 18, thus permitting the latter to collapse sufficiently to he disengaged from the friction shoes and fully release the gear. During rthis, release movement, it is also apparent that the spring disks .0,7 will assist the spring 29 in collapsing the wedge.

ln 'the construction illustrated in Figs. It, 5 and 6, the arrangement ot draw har. tollowers, yoke, friction shell and spring is itl@ los

similar to` that .of the structure illustrated l in Eigs. l., 2 and 3, and need 'not `here he detailed. Coperahle with the friction shell is' acircularly arranged series of friction --shoes 115; preferably four'in number, each of which is provided on its inner face with a wedge surface' ll. .'Coperablewith the friction shoes is a selfecontained expanding wedge which, in this instance, comprises four outer wedge -elements V118-118 each having an outer wedge face 121 coperablc inwardly, the dished spring disks 120 tendjjh to flatten out with the result that the pei' with the corresponding wedge face of a` frid tion shoe, a pressure transmitting plug 1-19 fit-ting within the elements 118' andslidable with respect thereto, and an exp'ansible spring wedge consisting of two oppositely dislrs 120 are provided around their peripheries with Haired anges 120u which en gage corresponding interior surfaces on the wedge elements 11.8. y rlhe operation of the construction illustrated in Figs. a, 5 and 6 is as follows: Upon inward movement of the ldraw bar, pressure is transmitted from the frontvfol-v lower to the plug 119. As the latter moves ripheries or flanges 120 thereof are expanded radially, thus forcing the wedge elements 11.18 outwardly against the shoes 115. In this construction it will be apparent that a constant angle is also maintained betweenA the wedge proper and the friction shoes' while at the same time the wedge is eirpan.-` I sible and collapsible and contains the spring'.

is provided with an inner wedge face 216 with which coperates the self-contained expansihle wedge. The latter, as shown, comprises a plurality of outer wedge elements 218, one for each shoe, each of said elements being provided on its inner face with rthree wedge surfaces222e,A 222", and,

222. Coperahle with the last. named wedge surfaces are .corresponding wedge surfaces 22thj 223D, and 223'formed on the outer surface ofa central wedge plug 219. The plug 219 is centrally recessed as indicated at 50, to accommodate a plurality of disk springs 220, the latter hearing at. their outer ends against the plug 219 and at their inner ends against a button 225 that has an extension 226 passing between the inner ends of the wedge elements 218. To prevent accidental separation of the wedge block 219 and the `wedge elements '218, said parts are provided With inter-locking shoulders 51 and 52. The operation of this gear will be understood from the preceding description of the construction illustrated in Fig. 1.

In the arrangement shown in. 8, the friction shell, main spring and V ton shoes a are th'e sameA as `the correspili.' 'lng parts shownin Flg. 7. In this construction, how ever, the expansible wedge employs a/ coil spring 320jyhi'ch is seated at one end against the' inner wedge plug 319 and at its other end against inwardly extending flanges 53 on the innemends' of the wedgeelements 318. Coperating shoulders 351 and'352 are provided on theAwedge elements and central plug to prevent separation of the parts, similar to the interflocking shoulders provided in the construction 'shown in Fig.

ln the arrangement shown in Fig. 9, .the friction shell, friction shoes, and main spring are similar to the corresponding parts'in the other views. In this arrangement, the wedge proper consists of a series of outerwedge elements 418, one'for each .friction shoe and coperable therewith, a central wedge plug 419coperable with all the ele-- ments 4:18,1 andl a releasing spring in the form of yakpluralit'y of dished plates 420,

the latter `rr-:acting at their outer end against the plug 419 and at their inner end against -100' inwardly extended flanges L153-formed on the v friction, shoes.

I claim: 4"

-1. In a friction gear,v the combination with -a friction shell, main spring, friction shoes copeable with the friction shell and having inner wedge faces, of an expanding wedge coperable with said shoes, said wedge having self-releasing lmeans contained therewithin reacting against portions of said wedge only. f

-2. In a friction gear, the combination with a friction shell, main spring, friction shoes coperable with the friction shell and having inner wedge faces, of a wedge-coperable with said shoes, said wedge comprising 'a plurality of independent outer wedge elements, an interior pressure block, and sprin means for forcin the block outwardly wit respect to the we ge elements during release and reacting against said block and outerv wedge elements.

' 3. In a friction gear, the combination with a friction shell, main spring friction shoes coperable with the friction shell and having inner wedge faces, of a wedge coperable with said shoes, the wedge comprising a plurality of independent, outer wedge ele- `ments each having an outer wedge face cooperable withy the wedge face ofv a friction shoe and an inner wedge face, and a wedge shaped pressure block Within said elements coperable with said inner Wedge faces thereof.

4. ln a friction gear, the combination with a friction shell, inain spring, friction shoes coperable with the friction shell and having inner Wedge faces, of a Wedge coperable with said shoes, the Wedge comprising a plurality of independent, outer Wedge elements each having an outer Wedge face coperable with the wedge face of a friction shoe and an inner Wedge face, a wedge shaped pressure block within said elements coperable with 'said inner Wedge faces thereof, and

, spring means contained Within the Wedge for e'ecting its release.

5. ln a friction gear, the combination with a friction shell, main spring, friction shoes inoperable with the friction shell and lia-ving inner wedge faces, of a Wedge coperable with said shoes, said Wedge comprising a pluralityv of independent outer Wedge elements, an interior pressure block, and spring means confined within the Wedge against which said pressure block acts directly during actuation of the gear.

6. ln a friction gear, the combination with a friction shell, main'spring, friction shoes coperable with the friction shell and having inner wedge faces, of a Wedge coperable With said shoes, said Wedge comprising a i spring means being contained within the g Wedg 7. In a friction gear, the combination with a friction shell, friction shoes having wedge faces coperable with said shell, and a spring for resisting movement of the shoes, of a self-contained releasing Wedge coperable with said shoes, said wedge comprising a plurality of outer wedge elements acting directly against the friction shoes, an inner wedge plug for expanding the Wedge elements, and a spring reacting against said plug at one end and against the wedge elements at the other end.

In witness that I claim the foregoing I have hereunto subscribed my name this 15th day of Feb. 1917.

' JOHN F. OCONNOR.