US1374673A - Safety device for car-door-operating mechanisms - Google Patents

Description

j'. Fl 'SAFETY DEVICE FOR CAR DOOR )PERA'I'ING'MECHANISM'S` nire raras orifice.

JOHN F. OCONNOR, 0F CHCAGO, ILLNOS, ASSGNOR T0 WILLIAM I-I. MINER, OF CHAZY, NEW' YORK. Y v 'Y SAFETY Dnvrcn non campeon-OPERATING MECHelvrsMs. i

specification of Letters Patent. v' PatentedApr. 12, 1921.

Application led, November 6, 1919. Serial No. 336,055.

To all whom t may concern:

Be it known that I, JOHN F. OCoNNoR, a citizen of the United States, residing at Chicago, in the 'county of Cook and State of Illinois, have inventedl a vcertain newk and useful Improvement in 'Safety Devices for Car-Door-Operating Mechanisms, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates t0 improvements in safety devices for door operating mechanisms.

The object of the invention is to provide an eicient safety device applicable Afor use in door operating mechanisms of dump cars and the like and whereby danger to the operator, during the opening movements of the doors, is eliminated.

In the drawing forming a part of this specification, Figure 1 is an end elevational view of a door operating mechanism show.- ing my improvements' in connection therewith. Fig.` 2 is a verticallongitudinal sectional view taken substantiallyon theline 2-2 of Fig. 1. Fig. 3 is a vertical sectional' view taken partly on the line 3 3 of Fig. 2 and partly in a plane coincident with'the' outer edge of the internal gear. And Fig. 4 is a vertical sectional view of a door operating mechanism and associated doors of a dump car, the mechanism being of a well'- known type.'

In said drawing, 10 denotes an operating shaftof a car doormechanism to which is secured a winding drum 1l'. Pivotally connected to the drum 11 at 12 is a link 13 to which in 'turn is pivotally attachedY another link 14. Pivotally connected to the link 14 are elongated hook- shaped links 15 and 16. The latter are pivotally connected to eye-bolts 17-17 adjustably attached to the free edges of pivoted 'doors 18-18. The link 14 has a shoulder 19 which is adapted to cooperate withacorrespond- 'ing shoulder 2O formed on the hub 11 to insure the unwinding Aof the' linkages when the shaft` 10 is rotated in a clockwise direction. It will be noted that the link 14 and hub 11 have coperating flat surfaces 21 so positioned with respect to the pivotal connections between the links 15 andv 16 and doors 18 as to relieve the vshaft 10 of all torsional strains when.. the doors are .in

closed position. lncarryingv out my invention, I provide a llost motion clutch form of safety device at the end of the shaft 10 and,` as shown, this clutch comprises, broadly, an outer clutch member A, an inner clutch member B`,'an internal gearLC, and apinion D. l .v

The clutchmember B is provided with a hub 22 which is recessed soas to fit over the non-circular end of the shaft 1Q andbe rivf eted thereto as indicated at'23. Saidmember B is provided with an annular flange ,24

which, in conjunction withthe clutch member A, as hereinafter` described, forms a housing for the pinion" and internal gear. Aroundits periphery, said member B is provided with va series o'f shoulders 25 with which is ladapted to Vcoperate a pivotally'v mounted locking dog 26 of well-known formV to hold the` door mechanism positively in locked positionwhile the car is Vin transit. The pinion Das clearly shown in Fig. 2, is preferably formedintegrally with the clutch member B and is located in alinement with the axis of the shaft 10. Beyond the pinion D, the clutch member B is provided 'with an integral axle 27 on which the clutch member A is rotatably mounted.

The clutch member Bk is provided with` an axially extending opening 28y to accommodate avrivet or other suitable securingl element 29 which also passes through theclutch member A. and is adapted to hold the parts in assembled relation, as will be understood.

rThe clutch member A lis provided on its outer sidewith a squared section 30 adapted to accommodatetheusual claw bar orother operating tool. In addition,V said member A has a disk-like flange 31 whichV covers lthe pocket or recess defined by the annular iange 24 and, in'conjunction with the latter, forms the housing for the other parts, as hereinbefore explained. YOn its interior, said ange 31 has formed therein an an'-v nulargroove 32 which extends fora complete circle except for a lug 33 which .ex Vtends Vthrough arelatively short arcji, The `'lug-33 is best indicated by dotted lines'in eliminated.

, Clearly indicated in Fig. e, and mi internal gear C has a peripheral lug of relatively" ShQtLfWlQBPJG .OfDl @Sgiidicated 11136. v Said j .i

lug`36 is adaptedto travel within the groove; 32 and obviously will permit of lost motion t between the clutchmembei Afand the fin-Hy ll ternal gear C through an arc oic 360 lessw the combined arcsubtended bythe lugsl33 Y,

. Vnllwdf A bearing Vfor the internal gear YC i Vis provided by theV inwardly' extending flange 37 of the i"nF-ign.v l y.

H The operation of the' device is as follows: Assuming'the doors'in closed position and the'parts of the door mechanism Vas shown in clutch member A, as shown the drawingfth'e operator," after releasing the'dog 26',l will apply the claw bar*y to the squared `section of. theclutchme'mber A and Yproceed to rotate the latter lin a clockwise direction. Asthe member A is rotatedin 'a rclockwise directioni' the. lug 33 thereof will engage 'against the lug 36er the internal gear C andY consequentlyfrotate Vthe i'nternahgearjC in a `clockwise direction. This' movement is communicated tothe pin* ion D which of vcourse produces afcorrespending' rotation in theshaft l0.Av The shaft 4l0 `will thus berotated until such time as vthelinkages of the door mechanism `proper 1 `becomefunloclre'd-from the drum ll and the doorsfwstartrtoV swingdownwardly at high speed under the load thereon. This high speed rotation' of' the shaft -10 will cause the pinion D to rotatera'pidly as will be underlV stood andduring' the remainder fof the door opening operation, vthe clutch member A will remainstationary.y` fAs the pinionD -is 'rotated rapidly in -a clockwise direction* under theinluence of the freelyfffalling doors, tlie internalgear Cwill also'be rotated ina clockwise direction and the lug' 36 V thereof 'i will travel around the groove 32 until it comes into 'engagement with the op.- posite side of the lug1 33. This provides yfort fthe necessary lost motion Vbetween the mainV Vshaft l0 and 'the' manuallyoperated clutch v member A y! l andv injury to the operator is thus Y one "or `:one..andbnc-quarter revolutions.'

lhQe-se-v variations mayl be readily taken care4 fofvfin'y'my device by properly; proportioninq` the/.lugs ,B3-and 36V and the ratio ofthe yteeth infthefpinion lD tothe 'teeth inthe internal .g'jelr. ,Ci Inv they device as illustrated, `I, yhave y employed ffteenfteethY on the pinion D and :twenty teethl on the'int'ernal gear Cfsothat,

gior eten 'orerlee revolution made by the pinion D when it is traveling iinderthe influence' Aof the loaded doors, there will be produced onlyithree-quarter's of anievolu- Vtionof the internal gear C, and inasmuch as the combined are of the lugs 33 and 36 is less! Vthan?"909;-itifs .evident-V' that I obtain `slightly more than a complete revolution of lost-motion between the sliaftlancl 'the clutch memberfli.v n

As `ivil'l'be'appreciated by those skilled in the art7 the arrangement of pinion D and internal'vgear YC yconstitutes yaI differential gearing. l/Vhile a'specili'c ratio has been illustrated in the drawing, it'willbe'under'l stood by "those'skilledin'th'e'fart that lthe o .ratio'may beu varied to suit'difl/Terent'conditions by employing different nl imbersv of dteeth on the pinion 'and gear. i

' i-Aithough r 'have' hei-ein ish-ewa" and, del' Vscribed what l now'v consider. *the preferred u "manner of carrying; out 'myy-inventionythe same is merely illustrative andllrontemplate all changes and modifications as come within the'scope of the claimsappended hereto.

I claim :l

mechanism, the combination withrtwo rela- .tively rotatable clutch members.y one of which is adapted to be'directly operated and U the other is adapted to rotatesimultaneously vwith a shaft yof the mechanism, of anfinternal gear. loosely rotatably mountedbe- ,tween said, clutch members and havingalug rigid therewith, a* coperating lug .ononeoi' V).00

said clutchl members, said lugs ylimiting the amount of relative rotation between said internal gea-r and the clutchmember carry-V ing theA lug, and a pinionv coperable with Y said internal gear. and rigidly mounted on the other oi said clutch members.

i' Q .ln'asafety device fordoortolperating mechanism, the combination with two `clutch members, one of which is adapted .to be se- .cured to a shaik't'o'f` the mechanism and which is providedvwith; an:integral'journah the other clutch' member being rotatably mounted on said` journal andghaving' a` section .adapted to receive an operating toolyoll a vpairfciV cooperating` differentialgears inter',- L posed between' the'k two, clutch meinbers, one .of said' differential ygea-rs beingjrigid with Lone clutch member and theotherloosely; ro-

:tatably mounted with respectrto the other clutch :member for a limiteddista'nceg In a safetyv device for door operating;v mechanism, the .combination'with' a clutch' member adapted to be rigidly securedgtofva `shaft ofthe mechanism,Y said ,clutch member H ,having apinion formed integrallyftherewit'h Y 1* anda ,bearing aXle both in'- alinement with the. axis vof the shaft, of ai' xsecondfc'lutch member 'rotatablyl mounted on.y said-'bearing faxleand having'a section adapted to're- .ceivei an operating tool,A an internal? gearfin; 130

t 1.111 a safety device for doori'operating terposed between the two clutch members and having its center olisposed eccentrioally with respect to the aXis of the shaft, eooperating lugs on the tool operated Clutch member and the internal gear, .said lugs permitting relative rotation between the internal gear and said clutch member for an are less than 360, said internal gear being in mesh with said pinion, the ratio of the teeth on the pinion to the teeth on the in- 10 ternal gear being less than unity. j

In witness that I claiinjthe foregoing I have hereunto subscribed my name this 4th day of Nov., 1919.`

JOHN F. oo'oNNoR.

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