US1112593A

US1112593A - Dump-door-operating mechanism.

Info

Publication number: US1112593A
Application number: US58769110A
Authority: US
Inventors: Herbert A Bowen
Original assignee: NAT DUMP CAR CO
Current assignee: NATIONAL DUMP CAR Co; NAT DUMP CAR CO
Priority date: 1910-10-18
Filing date: 1910-10-18
Publication date: 1914-10-06
Anticipated expiration: 1931-10-06

Description

H. A. BOWEN.

DUMP DOOR- OPERATING MECHANISM- APPLICATION FILED 00T.18, 1910.

1, 1 12,593. Patented Oct. 6, 1914.

6 SHEETS-SHEET 1.

THE NORRIS PETERS CO.. PHOTD-LITHO4 WASHINGTON. D, c.

H. A. BOWEN. DUMP DOOR OPERATING MECHANISM. APPLICATION FILED 00m. 1a, 1910.

1,1 12,593. Patented Oct. 6, 1914.

S3 6 SHEETS-SHEET 2.

N O R KAI/ 4d am WWW, dwaww z THE NORRIS PETERS 60 PHOTO-LITHQ. WASHINGTON. n. c.

H. A. BOWEN.

DUMP DOOR OPERATING MECHANISM.

APPLICATION FILED OCT. 18, 1910.

Patented Oct. 6, 1914.

6 SHEETS-SHEET 3 5 {7y 7 ,xww w flm THE NORRIS PETERS C0,. PHOTO-LITHO.. WASHINGTON. D, c

H. A. BOWEN. DUMP DOOR OPERATING MECHANISM.

APPLIOA TION FILED OUT. 18, 1910.

Mg W m j 1 W THE NofiRIs PETERS 60., PHOTO-LITHO., WASHINGTON. U. C,

H. A. BOWEN.

DUMP DOOR OPERATING MECHANISM.

APPLIOATION FILED OUT. 18, 1910.

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ga 67i,

THE NORRIS PEYERS 60., PHOTO-LITHO.. WASHINGTON. n. C.

H. A. BOWEN. DUMP DOOR OPERATING MEGHANISM. APPLIOATION FILED OUT. 18, 1910, 1,1 12,593, Patented 0ct.6,1914.

6 SHEETS-SHEET 6.

Z J e zfier 30 wem Mam? THE Nofims PETERS C0.,FHOTo-Llri-10., WASHINGTON. D. C.

from their door supporting positions.

UNITED STATES PAT enrich.

HERBERT A. BOWEN, F CHICAGO, ILLINOIS, ASSIGNOR T0 NATIONAL DUMP CAR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

DUMP-DOOR-OPEEATING MECHANISM.

Specification of Letters latent.

Patented Oct. 6, 1914:.

To (ZZZ whom it may concern:

Be it known that 1, HERBERT A. Bowen, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in DumpDoor-Operat'ing lilechanism, of which the following is a specification.

My invention relates to dump cars and has for its object the providing of improved mechanism for operating the dump doors.

My invention relates more particularly to the hopper types of cars which have sloping end walls leading to a central discharge opening, though it may be applied to other forms of dump cars.

My invention is adapted to permit all of the doors to be operated from either side of the car.

A further object of my invention is to provide a mechanism which will permit the operation of the doors on one side only of the car by an operator who may be stated ing at either side of the car.

My improvements are related to doors which are hinged at the sides of the car and have their meeting edges at the center of the car, said doors being supported in their closed positions by movable supporting shafts or members lying longitudinally of the car. My improvements, however, are applicable to other arrangements than the above.

My improvements comprise more specifically, ratchet bars having movements transversely of the car. said ratchet bars being adapted to engage the supporting shafts and cause movements thereof toward or away These ratchet bars are operated by means which can be actuated. at either side of the car, and the direction of the movement produced may be controlled by the operator from that side.

Other objects of my improvements will be made more apparent in the following specification, taken in connection with the iiceompanying drawings, and the novel elements and combinations thereof will be set forth in the claims.

In the drawings Figure 1 is a side elevation of a hopper type of dump cars with my improvements applied thereto. Fig. 2 is a cross section of the lower portion of said car, taken substantially along the line 2 2 of F 1 and the line 22 of Fig. 4. Fig. 3 is a horizontal section of a lower central portion of the car, taken substantially. on the lines 33 of Fig. 4c and 33 of Fig. 2 with the dump doors and other portions of the mechanism omitted. Fig. at is a vertical section taken on the line H of Fig. 2. Fig. 5 is a vertical section of the central lower portion of the car, taken substantially along the line 55 of Fig. 2. Fig. 6 is an elevation of one of the guide plates through which the ends of the operating levers project. Fig. 7 is a detail of a portion of the operating lever. Fig. 8 is a side elevation of the same. Fig. 9 is a sectional detail of the dump doors. Fig. 10 is a perspective view of the ratchet bars, detent bars, and counterweights shown removed from the car, in incomplete and diagrammatic form to show their relation. Fig. 11 is a cross section on the line 11-11 of Fig. 3. Fi 11 is a cross section on line 11 of Fig. 2. Fig. 12 is a detail showing the form of the ratchet teeth.

In the drawings 1 have preferred to illustrate my improvements in connection with a car of the hopper type constructed chiefly of steel. In the said car the side walls 10 are made of steel plates, and the sloping end walls 11 are also made of steel plates suitably joined at their lateral edges to the side walls 10. The sloping plates 12 are attached to the side walls 10 at their upper edges and terminate in vertical portions 13 adjacent their lower edges, these vertical portions forming the side walls of a central discharge opening. The sloping end walls 11 are also provided with vertical portions ll near their lower edges, which serve as vertical end walls for the said central discharge opening. These vertical portions l1 terminate in flanges or lips 11, against which the dump doors close, as will be described later.

The central discharge opening is divided into two parts, which are in effect separate openings, by steel plates 1 1 and 15, which have sloping portions meeting at their upper edges. These plates 14: and 15 are oined together at said ed es by means of the

flanges

18 and 19, through which are placed rivets or other suitable fastening devices. The lower portions 16 and 17 of these plates 1.4 and 15 are given a vertical position and serve as walls for the two portions of the central discharge opening. These vertical portions 16 and 17 terminate at their lower edges in horizontal lips or flanges 16 and 17. The dump doors 202l when in their closed positions bear against the under surfaces of the lips 11 16 17 the.

The plates l-l and 15 are held rigidly in position by the angle bars 22 and 23, which extend transversely of the car and are secured to longitudinal frame members 2-l25. Other longitudinal frame members 2627 are attached to the lower edges of the side walls 10. vlntermediate transverse members 28 extend from the member 24: to the member2i' and from the member to the member 26.

The

dump doors

20, 21, &c., are pivotally attached to the members 21 25, at 29, 29. The doors 20-2l are provided with stiffenin'g ribs 30, which are upwardly turned at their outer ends and serve as means for the attachment of the hinge members. These ribs 30 are provided with a sloping portion 31 which terminates in a horizontal portion 32 spaced from the body of the doors 20-21 by Z-bars 33, or the like. These Z-bars have horizontal flanges to which the ribs 30 are secured, and similar horizontal flanges by which they are secured to the bodies of the doors.

The ribs 30 rest upon the rollers 86, which are rotatively mounted upon the supporting shafts 37. Shafts 37 are preferably square and are provided with sleeves 33 having a square, axial opening fitted to the square shaft, and having a cylindrical outer surface to which the said rollers 36 are rotatively fitted. The doors are held in their closed positions by said rollers which bear upon the horizontal portions 32 of the ribs 30. When said rollers are moved away from. this horizontal position, or outwardly from the center of the car. they roll along the inclined portions 31 and allow the

doors

20 and 21 to drop. My invention is more particularly related to the means by which the shafts 37 are moved away from and returned to their normal door-supporting positions, said positions being shown in Fig. 9 and others.

The sleeves 33 rest upon the supporting bars 39, which have horizontal portions 39 upon which the sleeves roll, as upon a track, and

vertical end portions

39 and 39 by which they are rigidly attached to the car frame. The vertical port-ions 39 are attached to the transverse angle bars 22 by suit-able rivets or other fastening means 39. They are also attached to transverse plates 4.0, which have positions directly below the vertical legs 22 of said angle bars and are secured to the vertical portions 1.6. 17 of the plates lat, 15. The lower edges of the plates 450 serve as means for guiding the sleeves 38., and hence the shafts 37, and they serve more strictly as means for preventing the shafts rising out of contact with the supporting bars 39. These transverse plat-cs a0 serve as continuations of the walls 16, 1'7 and complots the housing or protecting means for the greater part of the door-operating mechanism.

The sleeves 38 have gears 11 integral with or attached to them at their ends, the teeth of said gears meshii r with teeth or pins d2 fixed to the supporting bars 39. The row of pins 42 on each bar 39 serves as a rack in which the gears il operate when rotating to cause a movement of the shafts 37 on said track bars 39. Each shaft also carries two

ratchet wheels

43, 43, and L3 43 which mesh with and are driven by ratchet bars 44:, a4 and in, M9 The teeth of the two ratchet wheels l3, er slope in opposite directions and mesh with the teeth of the ratchet bars H, lat, which also slope in opposite directions and which are adapted to mesh with the teeth of their corresponding ratchet wheels. The teeth of the ratchet bar ll are adapted to engage the teeth of the ratchet wheel when moving toward the left, viewed in 2 and 3, and to slip over said teeth into a position making a new engagement with said teeth when moving toward the right, as viewed in Figs. 2 and 3. The teeth of the ratchet bar -14. are adapted to engage the teeth of the ratchet wheel 43 when said ratchet bar moves toward the right, as viewed in Figs. 2 and 3, and to slip over said teeth into position to make a new engagement with said ratchet wheel when moving toward the left, as viewed in Figs. 2 and 3. The teeth of the ratchet bar Hrare adapted to engage the teeth of the ratchet wheel d3 when said ratchet bar is given a movement toward the left, as viewed in Figs. 2 and 3, and to slip over the teeth of said "atchet wheel into a position ready to make a new engagement with the ratchet wheel 43 when moving toward the right. as viewed in Figs. 2 and 3. The teeth of the ratchet bar 44 are adapted to engage the teeth of the ratchet wheel st3 when the said ratchet bar is given a movement toward the right, as viewed in F igs. 2 and 3, and to slip over the teeth of the ratchet wheel ll 6 when moving toward the left, as viewed in Figs. 2 and 3. The reciprocating movements of said ratchet bars are effected by means of

levers

48, 48 which are pivotally attached to the car body by means of a pin d7. These levers extend to the sides of the car within reach of the operator. A downwardly extending arm 46 is fixed to these levers and is pivotally attached to the above described ratchet bars 44, 4:41, d ft- 4: 1;.

The ratchet bars are arranged in pairs 44 and 4A forming one pair, l-(l and 4 1: forming another pair, in such a manner that one ratchet bar only of each pair can be engaged with its respective ratchet wheel at the same time. The ratchet bars ii and ta are rigidly attached to a common center piece t-i which is pivotally attached to the downwardly projecting arm l-G. They thus con stitute, in ettect, a single bar and are made in sepa ate pieces for constructive reasons only. The ratchet bars at and lt also con stitute a single bar in ettect and are rigidly attached to a center piece l-i which is also pivotally attached to the downwardly projecting arm at The ratchet bars tc and H", as well as the bars and el t are so attached to their center pieces i l and it re spectively, that they have positions relative to each other, making angles of less than 180 degrees in order that both of said ratchet bars cannot make engagement with their respective ratchet wheels simultaneously. In other words, when one of the ratchet bars A, for instance, is engaged with the ratchet wheels the other ratchet bar lt must be free of its rachet wheel The center pieces ist and e have an angular form with their hubs and l located at the apexes of the angles. These hubs form the means for making pivotal attachment with the arm 46, a pin to being inserted through said hubs and through the eyes i6, 46 and a8 at the lower extremity of the said arm s6.

The arm 46 is preferably of rectangular form, having a considerable width in the direction of th axes of the pins 4-5 and 67. Kotches 46 and 46 in the lower portion of this arm 46 facilitate the attachment of the center pieces as and i4 The arm 46 is provided with laterally extending wings 46 and d6 to which the

levers

48, 48 are riveted. The ratchet bars are preferably riveted to the center pieces set, dat as shown at it. The pin a? is supported in

bearings

51, 52, which are fined to the plates 40 17, and 4-0, 16.

The teeth of the pair of bars 4%, 449 all slope in the same direction, and the teeth of the pair of bars it and 9? all slope in one direction, but in the opposite direction to those of the other pair. All of the teeth on the pair of bars let and ii are adapted to cause rotation, and hence a movement of the shafts 87 toward the left, as viewed in 2 and All of the teeth on the pair of bars ii and 44: are adapted to cause a rotation, and hence movement or the said shafts 37150- ward the right, as viewed in Figs. 2 and 3. One only, however, of the ratchet bars 4A, 4st can be in engagement with a ratchet wheel at a time, and the same is true with the pair of bars ts, i It will be observed that it is usually desired to more the shafts 3? in oppo t lirections at the same time. Ti'hen it is desired to move the siafts 3? toward the center of the car and close the doors, the ratchet bar at will be pl aced in engagement with the ratchet wheel and the ratchet bar l t will be placed in engagement with the ratchet wheel tti The other ratchet ii. a l will at this time be out of enement with their respective ratchet A reciprocating movement of the r bars under these conditions will cause the shafts 3'? to be moved toward the center of the car. iVhen it is desired to cause a reverse movement of the said shafts, the bars te ist will be moved into engagement with their respective ratchet wheels LB, 4.13" andthc bars 44, 4A will be out of enc; ement with their respective wheels. A reciprocating movement of the bars under these conditions will cause an outward move ment of the shafts 37.

li hen the shafts are being moved toward the center of the car it is desirable that they be held or detained at the ends of the steps in the movement, in order that they may not slip back while the ratchet bars are being moved into a new engagement with their respective ratchet wheels by the operator. The detaining means for the above purpose com- .rises ratchet bars 5%, which normally est upon. the rat net wheels 4, s'f at one side oi the ratchet bars .4, th.

Each the ratchet wheels &3, 43 is made of greater width than the other ratchet whe ls t and i3 in order to accommodate t These bars 53 and :34 are pivotally attached to the car frame by means of a pin 55. This pin is supported by

brackets

56, 57 which are rigidly attached to the

plates

40, 40. The bars 53, 54:, therefore, have a stationary pivot. They are adjustable with relation to this pivot in order to enable them to accurately engage the teeth of the ratchet wheels L3, 4-3. It is desirable to adjust the said detent bars within the limits of the lengths of a single tooth, in order that the said detent bars may prevent the slipping back of the shaft 37 to an extent equal to a fractional part of one of the teeth of the ratchet wheels. s adjustment is eliected by means or" set ws 7T, 78 which are inserted in the hubs 'G on the said detent bars. These hubs Given an elongated form in order to allow the desired adjustment with relation ment the p are being opened and tho loz: and

unrestricted open movement is desiroutward movement of the desirable to have the detent t of engagement with their re s ret Wheels. it is also desirable when grin 1g in e )eiident movements to 'i he doors, such as is neessary when partly opening; said score or partly closing them, to lift said detent bars army from the ratchet Whe ls. In order to a compl sh thi lilting nioveinent l have provided an up- 2.1 ll; tor l ll portio; 53, Which teriniin notes in r, horizontal portion 53 at the end of tie det nt bar 53 and a similar arrange said detent ha to he lilted entirely -free oi the shot wheel when the ratchet bars il i, l i

height that ry when reversing tire mechanism ai o hired to the much grease is nec J r and chm direction of movement of T he detent liars Will he lifted, when it is desired to more the shafts 37 mt"; i dly and to dump the load. 'll ese demay also he lifted by hand when the o ierutor desires to eii' ect 1. smaller inovein 01 der no hold the hers in their proper 1011 engaged with the desired ratchet wieels, F provide Weighted members (ll, (353, to (5?. Beginning with the n'eiehted ineinher 6-1.- it will be seen to he l it 69 to the plate A slot 68 is proi'ided in said ineinher Set which has a when the ratchet bar er in engagement with the ratchet 3. Jr laterally projecting pin 60,

integg with said l) projects into the slot 35. 'lhis pin serves the purpose oi htt- (hl when th bar is raised.

e or the bar i l is not (it, because of v ;;lot (58 permits a free move- (30 therein.

.no weight of is fully ei'l'ectire in l in engagement When the 'atchet lot (38 assumes e pos supported elin this posito rennzin in its elecipi'ocating movei to ny appre the weight r-Himiort ('39.

her *il l is in its lower position,

such position being shown in the drawings in and 10 more particularly, the weight (3'3 occupies an elevated position, hecanse of the fact that t 1e har l i is elevated at the time that the bar t is in its lowe position. The above reniuirhs relating to the e evated position of the Weight 6 t apply also to the 'ht 66 in the position shown in sa'd :2 and 10. it Will be seen that When placed in posi L011 the tendency of the ight (hi, or 66 LS th case may he, is to hold them in that positioi The said lg'hts will ho d them in that ptsition until the operator 6219i sullicient force upon either or the

ends

79 or 81 to reverse the said position.

in order to allow for the ex'ra Weight of which must he lifted at that the bar is lifted, l mater Weight in the body (36 to le body (i l. 'l his dii'ler- Weight l he snl'licient to be ance e Trey ht oi? the detent bar. 45in entirely 'lar arrangement is provided for the bars though ct course in their reversed 3.1. All of the above remarks Which to bars all i and the Weighted inein- .2 i a l. associated with them, vill apply to the r het liar ll, and the Weighted inenil." Q5, (37. in Fig. 10 the bars are shown iratel'v in more or less diagrammatic in order to make thei relations more 11 is siioivn e sectioml View taken In l spore I .nately on the line l111 cl Figs.

2 zind 3. This section is talten substantially through the pivots TO and 71 of the weights G6, 65. The pivot pins 70, 'll ae saouldered in the plates ll), ll) and the Weights are held in position thereon by Washers and 71. The pins are riveted at their ends over the said Washers and also over the said plates. In this view the different thicknesses oi"- the counterweights (S5, 66 will he ol served. 1 he relations of the ears en, 4MP to said Weights Wi ll be se an, said parts being shown in section. The laterally projecting lugs or pins (31, 62 will lo seen to project into said Weights. The relation of the actuating lever 48 to the said parts Will be seen in this View.

In order to prwent an incoiinplcte stroke of the levers 4:8, id and thus to prevent a slipping back of the shafts 37 to an extent equal to o t action oi the length of: one oi the LQIQQ on the ratchet bars and thereby periittingg; one of the shafts 3? to grain upon 1e otl and to reach its closes posi i -11(l oi tl e other, thereby la an imect clos V of one of the doors, I 'n'ovide a toll stroke mechanism in con ne :tion With said levers. This full stroke mechanism comprises lugs S3 projecting laterally from the said levers 48, 48" and preferably integral therewith, said lugs being adapted to cooperate with curved or segmental ratchet bars 84, 84. These ratchet bars are pivotally attached to the framework of the car at 85, 85 in such manner that the weights of said ratchet bars tend to cause them to move inwardly toward the body of the car; for accomplishing this purpose the upper ends of the ratchet bars are given a right angular form as shown in the drawings. The inward movements in the ratchet bars are stopped by the

plates

92, 92 against which the extreme lower ends of said ratchet bars make contact. The projecting lugs 83, 83 have sloping surfaces which cause them to easily slip over the inclined faces of the ratchet teeth 86 in the upward movement of the actuating levers 48, 48. In the downward movement of said levers, however, the said lugs have a tendency to engage the horizontal faces of said teeth and the downward movement is thereby arrested in the event that the said levers have not previously been carried to the upper extremities of their strokes. In order to prevent interference of the downward movement of either of the

levers

48, 48 after a complete upward stroke has been effected, a device is introduced for holding the ratchet bar 84 out of the path of the lugs 83. This device is moved into its operative position at the extremity of the upward move ment of the levers. This device comprises the cam shaped member 88 which is pivot ally attached to the ratchet bar 84 by means of the pin 89. The normal tendency of the member 88 is to assume a pendent position with its lower curved face 88 in contact with the stop pin 90. The curved face 88" enables the lever 48 to wedge or cam the member 88 into the position shown at the right in Fig. 2. In this position the extremity of the member bears upon the plate 92 and the ratchet bar 84 is thereby held in a position spaced from the said plate 92 and in such position that the teeth. 86 will not interfere with the downward movement of the lug The lower extremity of the ratchet bar 84 is provided with an inclined face 87 against which the lug 83 strikes at the lower extremity of its movement and pushes the said ratchet bar to its outermost position. This outward movement is a swinging movement having the pin 85 as a pivot and it will be seen that the member 88 will be drawn away from the plate 92 a sufiicient distance to permit it swing downwardly and free of said plate. The corresponding member 88 at the left side of the car, as viewed in Fig. 2, is shown in the above described lower position.

It will now be seen that when the lug S3 begins its upward movement the ratchet bar 84 will be free to move inwardly; and again rest against the plate 92 at its lower end. In view of the fact that one of the arms 48 is moving in opposite directions to the other arm 48 throughout the operation of the mechanism, it will be seen that one or the other of the ratchet bars 84 or 84 will be effective at all times in preventing an incomplete stoke of said levers.

The operation of my invention has already been frequently referred to and it will be further stated that when the operator wishes to dump the load in the car he will first manipulate the ratchet bars 44, 44*, 44 and 44 in such a manner that the

portions

44 and 44 are in contact with the

ratchet wheels

43 and 43", respectively. This he is able to do from either side of the car by means of the

ends

79, 80 of the

bars

44, 44, respectively, on'one side of the car, or by means of the

ends

81, 82 of the

bars

44, 44 on the other side of the car. These ratchet bars are yieldably held in the above described positions against ordinary displacing causes by the

weights

67, 66. lVhile manipulating the

ends

79, 80 or the ends 81., 82 as above described, the detent bars 53, 54 are moved out of engagement with the

ratchet wheels

43, 43 and said detent bars will not then interfere with the rotation of said ratchet wheels nor hence with the outward movement of the door supporting shafts. The operator then imparts an oscillating movement to the

levers

48, 48 by means of either of the ends 58, 59 on either side of the car. This oscillating movement causes a reciprocating movement of the ratchet bars and those

particular portions

44 and 44 which are engaged with the

ratchet wheels

43 and 43 will be effective in causing a movement of the shafts. This movement will be outwardly as above described. As previously described, the operator will be unable to impart other than complete strokes to the said levers, because of the full stroke device comprising the ratchet bars 84, 84 and the projecting lugs 83, 83

When the operator wishes to close the doors he first manipulates the ratchet bars in an opposite manner to that previously described by means of the

ends

79, 80 or 81, 82. When closing the doors he places the ratchet bar 44 in engagement with the ratchet wheel 43 and the ratchet bar 44 in engagement with the ratchet wheel 43. By this movement the detent bars 53, 54 are allowed to drop into engagement with said ratchet wheels. These detent bars prevent slipping back of the door supporting shafts while the inward step by step movement is being effected. The ratchet bars in this inward movement are actuated in a similar manner to that previously described in connection with the dumping of the load. The operator imparts an oscillating movement to the actuating levers 4-8, 48 the end or on either side of the car.

it will he observed that the operator can so manipulate the ratchet hars that only one of them will be in cont ct with one of the ratchet wheels, in which case the doors on one side only of the car may be operated. This result may be ei'l'ec' d by placing either pair of ratchet bars at, est or it, is" in a mid-position in which neither of the ratchet bars of said pair is in contact with a ratchet Wheel. la doii this it Will be necessary for the operator to retain his hold upon an

end

79, 80, 81 or 82 of the particuhn; ratchet bars which he Wishes to.

hold in said mid-position.

it Will be seen that vvhen either of the Weights or (37 have an uprioht posit-1c ight is in a much gr n degree thrown upon their pivot pins 69, T0, 71 or lVh-en t most position, however, a much greater portion of the Weight is thrown upon the later

ally projecting pins

60, 61, 62 and Therefore, it will be seen that when the Weights are moved to their lovver positions they are very effective in retaining the ratchet bars in contact with the ratchet Wheels against accidental displacing causes. It will be further seen that when the ctamter-u'cights are in their upright posi tions they will oscillate easily upon their supporting pivots 69, Y0, 71, 7:2 and will offer little resistance to the reciprocating movements of said ratchet bars.

It will be further seen that the operator is able to partly or Wholly open the doors on one side of the car or to give them incomplete movements in either direction by first placing one of the ratchethars in midposition, out of contact vvith a ratchet Wheel and then manipulating the levers li-8 If it is desired to open the doors on one side only, either of the detent bars 53 or 5st Will he lifted by hand, according to which of the sides it is desired to open. The full stroke ratchet bars 84., S l may be moved out of the ivay by hand should it become necessary When oscillating the lovers i8, 48* to a less extent than their full strokes.

It Will be seen that l have produced very convenient and effective mechanism for the various purposes described.

llhile I have described more or less precisely the details of construction, I do not Wish to be understood as limiting myself thereto, as l contemplate changes in form and the proportion of parts and the substitution of equivalents as circumstances may sugg st or render Q'lipfitlltlllli Without departing from the spirit of my invention.

I claim:

1. In a car having a dump door, a shaft for holding said door in a closed position, a ratchet Wheel fixed to said shaft, and a by means of v are in their lowerratchet liar adapted to engage said Wheel and give said shaft a movement with relation to its supporting position, the teeth on said "\vheel being undercut to prevent diseng cement of the teeth of the ratchet bar therefrom.

In a car havine a dump door, a shaft for holci said door in a closed position, a ratchet wheel fixed to said shaft, and a ratchet bar adapted to engage said Wheel and. to give said shaft a movement with re lation to its supporting position, the teeth on a d Wheel being undercut and the enga n urfaces of the teeth on the ratchet har having a backward slope to prevent disanent of said teeth.

in a car having dump door, a shaft for holding said door in a closed position, a ratchet wheel fixed to said shaft, and a ratchet bar adapted to engage said Wheel and to give said shaft a movement with relation to its supporting position, the teeth on said Wheel having curved faces, and the e urfaces of the teeth on the ratchet bar having a backward slope to prevent disengagement of said teeth.

4-. in a. car having a dump door, a supporting shaft for said door, a reciprocating ratchet bar adapted to give said shaft a movement With relation to its supporting position, and means for retaining during the return stroke of said bar, said shaft in position at the end of each advancing stroke of the reciprocating movement of the bar.

In a car having a dump door, a supporting shaft for said door, a ratchet Wheel fiiiEfil on said shaft, a reciprocating ratchet bar adapted to engage said Wheel and to give it a rotary motion when reciprocated, means by which the rotation of said shaft causes its movement with relation to its supporting position, and means for retaining during the return stroke of said bar, said shaft in position at the end of each advancing stroke of the reciprocating movement of the bar.

6. In a car having a dump door, a supporting shaft for said door, a ratchet Wheel fixed on said shaft, a reciprocating ratchet bar adapted to engage said Wheel and to to it a rotary motion When reciprocated, means by which the rotation of said shaft causes its movement with relation to its supporting position, and a detent bar having teeth adapted to engage said ratchet Wheel and prevent its rotation in the opposite direction to that produced by said first named ratchet bar.

7. In a car having a dump door, a sup porting shaft for said door, a ratchet Wh eel fixed on said shaft, a reciprocating ratchet bar adapted to engage said Wheel and to give it a rotary motion When reciprocated, means by which the rotation of said shaft causes its movement with relation to its supporting position, a detent bar having teeth adapted to engage said ratchet wheel and prevent its rotation in the opposite direction to that produced by said first named ratchet bar, and means for adjusting said detent bar with relation to the engagement of its teeth with the teeth of the ratchet wheel and with relation to the teeth of said ratchet bar.

8. In a car having a dump door, a supporting shaft for said door, a ratchet bar adapted to give said shaft a movement with relation to its supporting position, a detent member for said shaft, and means by which said ratchet bar may cause said detent memher to become operatively disengaged from said shaft when said ratchet bar 1S operatively disengaged from said shaft.

9. In a car having a dump door, a supporting shaft for said door, a ratchet bar adapted to give said shaft a movement with relation to its supporting position, and means actuated by the operator and pivotally attached to said ratchet bar for imparting a reciprocating movement to said bar.

10. In a car having a dump door, a supporting shaft for said door, a ratchet bar adapted to give said shaft a movement with relation to its supporting position, and means pivotally attached to the car frame and to said ratchet bar for imparting a reciprocating movement to said bar.

11. In a car having a dump door, a supporting shaft for said door, a ratchet bar adapted to give said shaft a movement with relation to its supporting position, and means pivotally attached to the car frame and to said bar, and capable of being actuated by the operator from either side of the car for imparting a reciprocating movement to said ratchet bar.

12. In a car having a dump door, a supporting shaft for said door, a ratchet bar adapted to give said shaft a movement with relation to its supporting position, means pivotally attached to the car frame and to said bar, and capable of being actuated by the operator from either side of the car for imparting a reciprocating-movement to said ratchet bar, and a detent member pivotally attached to the car frame and adapted to engage said shaft.

13. In a car having a dump door, a supporting shaft for said door, a ratchet bar adapted to give said shaft a movement with relation to its supporting position, means pivo-tally attached to the car frame and to said bar, and capable of being actuated by the operator from either side of the car, for imparting a reciprocating movement to said ratchet bar, a detent member pivotally attached to the car frame and adapted to engage said shaft, and means by which said detent member may be operatively disengaged from said shaft when said ratchet bar is disengaged therefrom.

14. In a car having a plurality of dump doors, reciprocating supporting shafts for said doors, a ratchet bar having separate series of teeth adapted to engage andactuate said supporting shafts, one only, at a time, with relation to their supporting positions, and means for imparting a reciprocating movement to said ratchet bar.

15. In a car having a plurality of dump doors, reciprocating supporting shafts for said doors, a ratchet bar having separate series of teeth adapted to engage and actuate said supporting shafts respectively, one only, at a time, with relation to their sup portin positions, said ratchet bar being movable to a position wherein another of said series of teeth on said bar is adapted to engage and give a movement to another of said supporting shafts respectively, and means for imparting a reciprocating movement to said ratchet bar.

16. In a car having a plurality of dump doors, reciprocating supporting shafts for said doors, a ratchet bar having separate series of teeth adapted to engage and actute said supporting shafts respectively, one nly, at a time, with relation to their supporting positions, said ratchet bar being movable to a position wherein another of St id series of teeth on said bar is adapted to engage and give a movement to another of said supporting shafts respectively, and a detent member for one of said shafts, and means for imparting a reciprocating movement to said ratchet bar.

17. In a car having a plurality of dump doors, reciprocating supporting shafts for said doors, a ratchet bar having separate series of teeth, each series adapted to engage and actuate one of said supporting shafts respectively with relation to its supporting position, said ratchet bar being movable to a position wherein another of said series of teeth on said bar is adapted to engage and give a movement to another of said supporting shafts respectively, a detent member for one of said shafts, means whereby said detent member will be operatively disengaged from said shaft when said ratchet bar is disengaged therefrom, and means for imparting a reciprocating movement to said ratchet bar.

18. In car having a plurality of dump doors, reciprocating supporting shafts for said doors, and a ratchet bar having separate series of teeth adapted to engage and actuate said supporting shafts, one only, at a time, with relation to their supporting positions, and means pivotally attached to said ratchet bar and to said car frame for imparting a reciprocating movement to said bar.

19. In a car having a plurality of dump doors, reciprocating supporting shafts for said doors, a ratchet bar having separate series of teeth adapted to engage and actuate said supporting shafts, one only, at a time,

with relation to their supporting positions, and means capable of being operated from either side of the ear for giving a reciprocating movement to said ratchet bar.

20. in a car having a plurality of di doors, reciprocating SlppOli'iiig shafts ioi said doors, a ratchet bar hai-iing separate series of teeth adapted to engage and acti ate said supporting shafts, one only, at a time, with relation to their supporting positions, said ratchet bar being movable to positions wherein it will engage 111d actuate one or the other of said shafts at the will of the operator, means for resisting displacement of said bar from said positions, and means for impart-iin a reciprocating movement to said 'atcliet bar.

21. in a car having a plurality of damp doors, reciprocating supporting shafts for said doors, a 'atchet bar ht viiig separate se ries of teeth in diilerent portions thoreoi adapted to engage and actuate said supporting shafts, respectively, one only at a time, with relation to their supporting posi $10115, said ratchet bar being movable to positions wherein it will engage and actuate one or the other of said shafts at the will of the operator, weighted men'ibers pivotally at tached to the car frame, one of which is placed adjacent each of said s l the greater pressure being e. portion of said bar which is 22-. In a car having a plurality of dum i doors, reciprocating sup iorting sl for said doors, a ratchet bar havin rate series of teeth adapted to engage and actuate said supporting shafts, one only at a time with relation to their supportins paid ratchet bar l eing movable operator, a detent meinl er ror shafts, means by which said ra gagement with its respective shaft means for resisting diseng: 'ient of said bar from the particular shatnith which it may be engaged, sail resisting means being adapted to exert less resisuince to the movement of said bar when disengaging said detent member, and means for imparting a recin'oeating movement to said ratchet bar.

in a car having a plurality of dump door, reci irocating supporting shafts for said doors, a ratchet bar having separate series of teeth adapted to and actuate one or the other respectively of said supporting shafts at the vill of the operator, means for resisting disengagement of said bar from said shaft, a second ratchet bar like said first named bar except that its teeth are (.PPUS-ltCly slo ied and adapted to engage and actuate the shaft not engaged by said named bar in the opposite direction to nain d shaft, means for resisting genient of said second named bar t ii rid shaft, and means for imparting a ecinr ,catiiio' movement to said bars.

0 AD let. in car having a plurality of dump appearing supporting snal'ts for i o ratchet bar iavin separate ses of tteti acapted to engage and actuate i shaitts, one only, at a time, with relation to their supporting positions, said ratchet bar being movable to positions .ieroin it will engage and actuate one or the other of said shai'ts at the will ot the operator, means tor resisting displacement at bar trom said positions, a second ratchet bar like said first named bar except teeth are oppositely sloped and ted to engage and actuate the shaft not nd by said first named bar in the oppod rcction to said first named shail't, for FESlStlilQ' diseii 'a 'enieiit of said is 32 t]: I

d bar from said shalt, means for nst named means. ,viiig a plurality of damp shafts for said doors, a

:11 l 'ed to give said shafts reciprocating mm einents with relation to their sup positions, means capable of being oper d from either side ofthe car for actuating said. bar, and means for preventing incomplete strokes of said actuating car lav'i' a dump door, a supp rting shaft for said door, a ratchet bar adapted to give said shaft reciprocating m, ents with relation to its supporting pos 7 ii, and means for preventing incompie, *lro xes of said ratchet bar.

in, a car having dump doors, movable supporting members for holding said doors in their ch sed positions, actuating means for id members pivotally mounted on the car nine adjacent the center tliereoi and operol said meinbers at the. will of the operator. 29. in a car having dump doors, movable supporting members for holding said doors in their closed positions, actuating means pivotally attached to the car frame at the center thereof and operable at either side of the car, reciprocating means moved by said actuating means for moving said members with relation to their supporting positions, said reciprocating means being adjustable at either side of the car for reversing the movement of said members.

30. In a car having dump doors, movable supporting members for said doors, actuating means pivotally attached to the car frame between the sides thereof and having an oscillatory movement, and means by which said oscillatory movement may effect an intermittent movement of said supporting members with relation to their supporting positions.

31. In a car having dump doors, movable supporting members for said doors, actuating means pivotally attached to the car frame between the sides thereof having an oscillatory movement, and means by which said actuating means may impart an intermittent movement to said supporting members with relation to their supporting positions, said means being adapted to reverse the direction of movement imparted to said members at the will of the operator.

32. In a car having dump doors, movable supporting members for said doors, actuating means pivotally attached to the car frame between the sides thereof having an oscillatory movement, said actuating means being operable from either side of the car, and means by which said oscillatory movement may effect an intermittent movement of said supporting members with relation to their supporting positions.

33. In a car having dump doors, movable supporting members for said doors, actuating means pivotally attached to the car frame between the sides thereof having an oscillatory movement, said actuating members being operable from either side of the car, and means by which said actuating means may impart an intermittent move ment to said supporting members with relation to their supporting positions, said means being adapted to reverse the direction of movement imparted to said members at the will of the operator.

84. In a car having dump doors, movable supporting members for holding said doors in their closed positions, actuating means pivotally attached to the car frame at the center thereof and operable at either side of the car, reciprocating means moved by said actuating means for moving said members with relation to their supporting positions, said reciprocating means being adjustable for reversing the direction of movement of said members at the will of the operator, and means for retaining said reciprocating means in its adjusted position.

35. In a car having dump doors, movable supporting members for said doors, oscillatory actuating means pivotally attached to the car frame and reaching to either side, and means by which said actuating means may move said supporting members with relation to their supporting positions.

36. In a car having dump doors, movable supporting members for said doors, actuating means pivotally attached to the car frame and reaching to either side, means by which said actuating means may move said supporting members with relation to their supporting positions, and means for reversing the efiect of said last named means on said supporting members.

37. In a car having dump doors, movable supporting members for said doors, actuating means pivotally attached to the car frame and reaching to either side, means by which said actuating means may move said supporting members with relation to their supporting positions, means for reversing the effect of said last named means on said supporting members, and means for retaining said reversing means in its reversed condition.

38. In a car having dump doors, movable supporting members for said doors, reciprocating means adapted to give said shaft a movement with relation to its supporting position, a single means pivotally attached to the frame of the car between the sides thereof and operable from either side of the car for actuating said reciprocating means.

In testimony whereof, I have subscribed my name.

HENRY A. PARKS,

FLORENCE A. FLoRELL.

Copies 0! this patent may be obtained for five cents each, by addressing the flommissioner of Patents,

Washington, D. G.