US1547638A - Car-door latch - Google Patents

Description

July 28, 1925.

A. CAMPBELL CAR DOOR LATCH 2 sheets-sheet 1 Original Filed Jan. 30. 1922 .figf

4 In x il Ik n A. CAMPBELL CAR DOQR LATCH original Filed Jam.` 3o. 1922 2 sheets-sheet 2 By X4 Patented .lulyl28, 1925.

1 l .UNITED sTATEs *PATENToF vA RGYLE CAMPBELL, OF' CHICAGO, ILLINOIS,

corresponding substantially to the line 6 6 EQUIPMENT COMPANY, OF CHICAGO,

FICE.

nssIeNon To ENTERPRISE RAILWAY ILLINOIS, A CORPORATION Oli' ILLINOIS.

CAB- DOOR LATCH.

original aliplication med January so, 1922, serial no. 532,734, now raamt No. 1,455,520, dated nay 15,

i 1923. DividedLand this application filed July 10, 1922.

To all lwhom it may concern.' Y Beit known that I, ARGYLECAMPBELL, a citizen ofthe UnitedStates, residingiat Chicago, in the county of Cook and State of Illinois, have iifvented a certain new and useful Improvement in Car-Door Latches', 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. N, My invention relates'to improvements in car door latches, and is especially adapted for locking the doors of railway dulnp cars.

This application is adivision of my co- 'I pending application Serial No. 532,734, filed patent No. 1,455,520,

January 30, 1922, now 'granted May 15, 1923.

The objectof my invention is to provide simple and efficient means for locking the doors in closed position.

Another more specific object. .of my in` vention is to providev a simpleand reliable means for holding the pivot of the latch in assembled relation with the latch' bracket.

Other objects of the invention will more clearly appear from the description and claims hereinafter following.

l In the drawings forming a part-of'this specification, Figure 1 is a side elevation. of part of a dump car showing my improved latch. 'Figure 2 is an enlarged transverse sectional view corresponding substantially to the section' on the line 2 2 of Figure 1. Figure 3 is aside elevational view, on a still larger scale, of my improved door locking latch mechanism. Figure 4 is a horizontal ,sectional view substantially on the line L1 4 of Figure .3.' F igure 5 is a vertical Isectional view corresponding substantiallyto the section line 5 5 on Figure l. And Figure 6' is a transverse sectional view carrying on Figure 5.b

In said drawings, the car is -shown as provided with an underframe comprising a ridge shaped center sill 10, cross members, or diaphragme., an le iron side sills 13, side walls 14, side es 15, diagonal braces 16, fixed door sections A, drop bottom doors B, and longi tudnally extending cover plates orboards 18 over the center sill.

As shown in Eig. 2,-the-floor doors are or needle beams 11 and 12,

Serial No. 573,847.

. pivoted along their inner edges as indicatedat 19 to suitable hinge butts preferably attached to the .center sill or to the latter and the cross members of the underframe. Each of the doors B preferably consists of va plurality of longitudinally extending boards or planks secured together on the upper sides by a plurality of plates or straps, and braced on the underside vbya pair of transversely extending beams 21. Each ofthe latter, at the outer free edge of -the door, dicated at 21 and then extends outwardly' horizontally as 'indicated at 21b beyond the plane of the side wall 14, for the purposes hereinafter described.

Beneath each door, as shown in Fig. 2,

I locate a longitudinally extending bar 22,

is downwardly deflected as ina, and the latter in turn the adjacent needle beam-or cross mem- Y ber 11. Y

Preferably the bars 22 are provided with suitable hardened wear plates 24 onl their upper sides in line with the door braces 21 softhatV Wear on the bars is minimized andl the shock is transmitted to the door through the braces 11. The stop arrangement which I have shown is more or less resilient,l is eilicientin operation, superiorto .the usual angled flange employed -for asimilar purpose, and the strap attachment permits of the doors being stopped at any desired point,- it being'evident that the straps are extended below the bottom edges of the cross mem-^` bers or diaphragme. It will also be noted that the straps are placed so as to extend at right angles to the plane of the door Iwhen the latter is in its opened position,

thus placing the strap purely under tension and rendering it most ellcient.

In order to eliminate the use of expen- `sive shafts and the usual flexible door rais- -ing and lowering devices, I employ locking latches, two o Fig. `1. The details' of one of said'latches,

r each door, as shown in which are arranged right and left so as toswing toward each other as clearly shown in Fig. 1, are best illustrated in Figs. 3, 4,- and 6. Each of said locking devices comprises, broadly, a bracket or support C; a

lever latch D; and a locking cam E.

The bracket C, preferably a casting, is

j provided 'with a main back wall or web 30,

which, when the bracket is in position, bears against and is secured to the side wall strucl ture of the car as by a series of three rivets 31'-31. To provide a housing and also to prevent outward bending or movement of line shown best in Fig. 3l -The latch and locking cam are housed between the walls or webs 30 and 32, the swinging movement. of the lever latch D in a closing or operative direction being limited by said flange 33, as

shown in Fig. 5. The swinging movement of thecam E to its inoperative position.,.is likewise limited by the' same engaging the flange 34. j v 1 L I have provided a novel and etlicient means for .pivotally supporting the latch and cam. In the backl wall' or web 30 of the bracket C are provided depressions or circular recesses 35 and 36, the back wall at these points being thickened to allow for said recesses 35 vand 36 without weakening the casting. The Arecesses 35 and 36 accommodate the heads 37 of heavy pivot pins 38 and 39 for the latch and cam respectively, the Shanks of said pins being extended hori- :zontally outwardly through alined openings in said back. wall 30 and outer wall 32 as clearly illustrated in Fig. 4.. In this manner the 'pivot pins 438 and 39 are positively held against displacement after the locking device is in position, inasmuch as the heads of the pins are confined between the bracket and the adjacent fixed portions of the can structure. llith'this arrangement, the pins are stronger and less subject to bendin and shear than if the'same lwere extendengl en-V tirely through the bracket into the side wall structure of the cfa-r. The latch lever D is formed with a shank having the upper portion thereof 40 sloping downwardly and from its pivotal/ support toward the oppo site latch of the same set, the lower portlon of the shank as indicated at 41 extending vertically when the latch is in' operative position. At the bottom of the shank, is formed a bearing or locking face 42 which is curved on a relatively long radius about a center eccentric to the axis of the pivotal connection of the latch so that said curved bearing-face 42 when it is ushed vhome against a corresponding curv bearing face 43 provided on the bottom of a block 44 secured to the outer (end v21" of the door brace, will have a wedging effectinA pushing the door tofully closed position. It will also be noted that the shank of the latch D is of right angular cross-section with one flange 45 extending'in planes transverse of the car and the other or outer flange 45 extendin parallel to' the car and overlapping the en kof the door brace andblock 44 when in operative position. i

The locking cam. E is of the usual type, having a cam surface adapted t0 engage with a fiat surface 46 on the portion 40 ot the shank of the lat'ch lever. a

As will be understood by those skilled in the art, the vdoors are adapted to be lifted by hand or-by means of a suitable lever engaged with a socket or bracket on the underside of the doorand lifted to closed position. As the doors approach their closed position, the projecting ends 21"' engage' the beveled lower ends 47 of the latclr levers D'thereby pushing the latter so as to clear the extensions 21" until theflatter are suiclently elevated for the locking faces 42 of the latch levers to swing under ythe .locking lfaces 43 under the influence of gravity.

With myj'arrangement of locking latches,

it is evident that th'e expense for the doorlf operating means is very materially reduced as compared with prior arrangements, commonlyvemployed on' general service cars, so that -thispreduction ofV the expense in conjunction-with the reduced cost of the doorsl and' fittings, makes the entire car an ex'- tremely inexpensive one to manufacture.

I have herein shown and now consider the v ing out theinventiom-but the same is merely illustrative and I contemplate all changes and modifications.. scope of the claims"appended hereto.

I claim:

1. Ina car, the combination with a pivoted dump door having a projection from one of its edges; of means for lockin Y in closed position comprising, a racket secured to a fixed part of the car, a shouldered latch engageable with* said projection end a headed pin forpivotally supporting sald latch from said r 'through the bracket andl having its hea confined between the inner face of theV said door racket, said pin extendingl .105 that come Ywithin the bracket and the adjacent portion of the car.

2. .Ina car, the combination with a pivoted dum door having a projection from one of its ges; of means tor locking salddoor in cl'osedpositioncomfprising, a' bracket sej cured to a fixed part o the car, a shouldered latch engageable'with said projection, sald latch being pivoted to the bracket; a lockingI with sal latlpelodhold itfin.

-o ratve position an fa. e j pin or piiiotally supporting said locking from.

said bracket, said pin extending through the cam engageable .ed dump door having a projectionv from one e of its edges; of means for locking said door in closed position comprising, a bracket secured to a fixed portion of the car, a shouldered latch engageable with said projection, a locking cam engageable with the latch, and headed pins for pivotally supporting the latch and locking cam, each pin extending throughthe bracket and having its head confined between the inner face v of the bracket and the adjacent portion of the car.

4. In a car, the combination with a pivoted side dump Hoor door having extensions from its free edge extending outwardly beyond the side wall of the car; of means for holding said door in closed position, said means comprising brackets secured to the outer face of the car wall and shouldered latches pivotally attached to said brackets adapted to engage said projections, said latches having Shanks of angular cross-section.

5. As an article of manufacture, a latch for pivoted doors, said latch comprising, a bracket having an inner wall and an outer wall spaced therefrom to form a housing, a, shouldered lever pivotally supported from said bracket between said inner and outer walls thereof and depending below the bracket and adapted to fall to operative osition under the influence of gravity, a loc 'ng cam cooperable withm said lever to hold it in operative position, and bodily detachable pivot pins for said lever and locking cam,

said pivot pins being provided with retaining means adapted to engage one side of the bracket and a portion of the surface to which the bracket is secured.

6. In a door device f or railway cars, the combination with a hinged drop door having a hook-engaging seat formed thereupon, of a door-supporting hook pi\ oted upon the car body and arranged for supporting cooperation with the said seat, the said hook havin a shank portion and a supporting ledge elow the shank portion arranged for engagement with' the said door seat, there being an` integral shroud of metal connecting the said ledge with the said shank portion, the said shroud being arranged to one side of the said ledge.

, the said base and some thereof bein k7. In a door device for railway cars, the combination with a hinged drop door having a hook-engaging seat formed thereupon, of a door-supporting hook pivoted upon the car body and arranged for supporting cooperation with the said seat, the said hook having a shank, portion and a supporting ledge below the shank portion arranged for engagement with the said door seat, there being an integral shroud of metal connecting the said ledge withrthe said shank portion, the said shroud being arranged to one side of the said ledge and outwardly of the said ,seat on the door.

8. A locking device for car doors embodying a base withinner and outer spaced walls comprising ahousing, a hook pivotally mounted between f said walls, an end wall connecting the said innerand outer walls, the said end wall extending around the top of the hook in an arcuate path.

9. A vlocking device for the drop doors of railway cars, embodying a bracket with integral inner and outer walls and an integral connectingwall, a hook pivoted between the" inner aridouter walls, the said connecting Wall extending at an angle with the general line of the-bracket and following the contour of the forward edge of the hook, and bracket-securing rivets extending through the said inner wall, the same being arranged along the said connecting wall.

10. A locking device for'the drop doors of railway cars, embodying a bracket with a base portion, an outer Wall integral with and spaced from the said base, an integral connecting wall, a hook pivoted between the base and the outer wall and lying along one side of the connecting wall, a dog pivoted to the bracket to the rear of the hook, and a plurality of rivets connecting'the ,bracket to the car, the said rivets passing through located along one side ofthe said connecting wall and the hook` and others thereof being located to the other side of the said connecting wall and the hook.

In witness that I claim the have hereunto subscribed my 24th day of Junel 1922.

ARGYLE CAMPBELL.

foregoing I name this

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