US1282110A - Dynamometer-car. - Google Patents

Description

J. F. OCONNOR. DYNAMOMETER CAR.

APPLICATION man SEPT. 8, 191s.

Patented oet. 22, 1918.

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J. F. OCONNOR.

DYNAIYIOMETER CAR.

APPLICATION FILED SEPT. 8. |916.

Pdtented 00L 22, 198.

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J. F. OCONNOH.

DYNAMONIETER CAR. APPLICATION FILED SEPT. 8,1916. 1,282, 0 Patented Oct. 22, 1918.

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M14 j u .B Y W @ATTORNEY J. F. OCGNNOR.

DYNMOMHER CAR.

APPLICATION FILED SEPT. 3. I9I6,

Patentd Oct. 22, 1918.

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W I TNESSES ATTORNEY DYNAMOMETER CAR.

APPLICAUON FILED SEPLB, 191s.

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l'UNITED STATES PATENT OFFICE.

JOHN F. OCONNOR, OF CHICAGO, ELIIZIIN'OIS,` ASSIGNOR TO WILLIAM H. MINER, OF CHAZY, NEW YORK.

DYNAIVIOMETER-CAR.

Specication of Letters Patent.

Patented Oct. 22, 1918.

Application filed September 8, 1916. Serial No. 118,968.

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 invented a certain new and useful Improvement in Dynamometer-Cars, 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 to improvements in i l vnamometer cars.

One object of this invention is to provide a dynamometer car which may be used under actual operating conditions for testing the actions of draft gears.

Another object of the invention is to proride a dynamometer car having means for making a continuous record of the draw bar pull or tractive effort and' substantially instantaneous records of the performance of a gear under sudden impact or draft.

The invention furthermore consists in the improvements in the parts and devices and in the novel combinations of the parts and devices herein shown, described and claimed.

ln the drawing forming a part of this specification, Figure l is a horizontal sectional view, taken above the floor line of a dynamometer car showing my improvements in connection therewith. Fig. 2 is a vertical,

longitudinal sectional view of the car illus trated in Fig. 1 and taken on the line 2 2 thereof. Fig. 3 is an enlarged top plan view of the recordingmechanisms and parts immediately associated therewith. Fig. 4 is an yenlarged vertical, longitudinal sectional view taken substantially on the line 4 4 of Fig. 3. Figs. 5 and 6 are transverse, vertical sectional views taken on the lines 5 5 and 6 6, respectively of Fig. 3. Fig. 7 is an end elevation of a portion of the car end and casting employed with the draw bar. Fig. 8 a broken, side elevation of the structure illustrated in Fig. 7. Fig. 9 is a transverse, vertical sectional view taken substantially on the line 9 9 of Fig. 8. Fig. l0 is a diagrammatical view illustrating a sample record card made with one of the recording mechanisms. And Fig. 1l is another diagrammatical view illustrating a sample record card made by the other recording mechanism.

In said drawing, the dynamometer car is shown as provided with channel center sills 20 extending from end to end of the car, floor 21, end walls 22, roof 23, side walls 24c 24, and a centrally located `pit 25, the

latter being rendered accessible by steps 26 at each end. The end and side walls of the car are provided with suitable doors 27 27 to permit access to the interior of the car. rlhe car is provided at each end thereof with a coupler 28, the coupler at one end having a coupler or draw bar extension 29 which extends beyond the center of the car and overlaps a coupler or draw bar extension 30, rigidly connected to the coupler at the other enl of the car. The details of said draw bar extensions are more particularly hereinafter described.

Each draw bar extension 29 and 30 is preferably provided at its outer end with a box-like casting 31 bolted thereto as indicated at 32, each casting 3l being adapted to receive and rigidly hold the shank of itsr respective coupler 28. The drawbar extensions 29 and 30 are adapted to reciprocate back and forth freely between the center sills 2O and in order to permit this and at the same time maintain the longitudinal movements of said draw bar extensions in a horizontal line. I have provided ya series of links 33 pivotally suspended from cross bars 3l mounted on the tops of the channel center sills. A corresponding number of upwardly extending links 35 are pivotally mounted on cross bars 36 secured to the bottoms of the center sills. Each set of links 33 and 35 (see Figs. 8 and 9) is pivotally connected with links 37 which are arranged horizontally in normalposition. The links 37 are pivotally mounted on cross pins 38 extending through the respective draw bar extensions. With the arrangement shown, it is apparent that upon either inward or outward movement of the draw bar extension, the centers of the cross pins 38 thereof will always travel in a horizontal plane due to the parallel motion linkages above described. In the drawings, I have shown two'sets of parallel linkages for supporting each of the draw bar extensions, see Figs. 1 and 2.

By referring to Figs. 3, l and 5, it will be seen that the channel center sills are each provided with a stop casting 39 on their inner faces, the stop castings 39 each having six main stops 40, 4l, 4-2, 43, 44 and 45.

Each of the stop castings is also provided 110 eov Las

with a corresponding number of limiting stops 14:0, l-l-Il, 1&2, 143, 14A and 145. Mounted between said stop castings are three sets of springs A, B and C. Each set comprises three springs arranged side by side, the sets A, B and C being arranged in tandem formation, that is, one behind the other in line with the axes of the draw bar extensions. Each set of springs A, B and C is provided at its ends with springfollowers 240, 241; 242, 2&8; and 2de and lThe draw bar extension 29-is forked at its inner end as indicated at 129, 129 and between the arms or forksr129 extends the inner end of the extension 30. rlhe arms 129 of the draw bar extension 29 are recessed to accommodate thesprings and followers and portions of said arms 129 normally engage the followers 240, 241, 2412 and rlhe followers 241 and are engaged by vertical thimbles 46. The draw bar extension 30 is also recessed to accommodate the springs and followers and it Y normally engages thc fel lowers ,24;0, 243, 2411iand 245, said extension 30 having a. vertical thimble located bev tween the followers 2%1'3 and 244i.

From the preceding description, it will be seen that, when a pull is exerted on the coupler having the extension 30, the end sets of springs A and C will be compressed, that is, the follower 24:0 will be moved toward the follower 241 which is held relatively7 fixed and the follower 24st will be moved toward the follower 2&5 which also is held relatively fixed. Upon an inward or butiing movement of the same draw bar extension 30, the two sets of springs B and C will be compressed, the follower 243 being forced toward the relatively stationary follower 242 by the thimble 4:7, and the follower 245 moved toward the relativelyT stationary follower 2li. Upon an out-ward movement of the draw bar extension 29, that is toward the left as viewed in Fig. 3, the sets of springs A and C will be compressed since the followers 2li and 245 will be moved toward the left. Upon an inward movement of the draw bar extension 29.1 that is, toward the right as viewed in Fig. 3, the sets of springs A and B will be compressed since the followers 240 and 242 will be moved toward the followers 2&1 and 24.3, respectively. Each of the draw bar extensions with its coupler, is made extremely heavy and preferably of 9,000 lbs. each since this weight is the weight of a drop hammer ordinarily used in testing draft gears with a drop hammer. The reason for adopting this weight in the present construction will appear hereinafter, although it is apparent that other weights may be used and the proper calculations made therefor.

From the preceding description of the arrangement of springs, followers. and draw bar extensions cope-rating therewith, it will anic the draw bar pull, l have provided the fol- 1 lowing arrangement.

By referring more particularly to Figs. 3, 6 and 11, it will be seen that there are-,two bridge members 458-48 whichfextend from one arm 129 .to the other arm 129 of thc draw bar extension 29 and over the draw bar extension 30. Mounted between said bridges 48 is a rotatable cylinder 49 with its axis extending longitudinally of the car.`

Said cylinder t9 is adapted to have wound therearound a record strip 50 which unrollsfroma spindle 51 also rotatably supported by the bridges 48 at the opposite ends thereof. The strip 50 passes over a lixed bed or plate 52 carried by the bridges48. The cylinder 49 maybe rotated by any suitable means at a constant, relatively slowy speed as by a clock mechanism indicated diagrammatically at 53 in Fig. 3. lt is obvious from the preceding description, taken in connec tion with the drawing, that the'record strip 50 will partake of the movements of the draw bar extension 29. Pivotally attached to the draw bar extension 30 as indica-ted at 54C so as to partake of the movements of said extension 30, is a lever -having the inner end 'thereof extending over-the record sheet 50. rllhe inner end of the lever 55 carries a pencil or other suitable Vmarking device 56, whereby to make a diagram or record on the sheet 50. When the two draw bar extensions 29 and 30 are in normal position, it is apparent. that the pencil 56 will make a line corresponding to the line r, s on the record strip 50, which is at the center of the strip. 'lhe record strip 50 is preferably provided with a series of lines t, t arranged parallel to the line r, s, the lines t corresponding to the amount of draw bar pull. When a. pull is being exerted on either of the draw bar extensions 29 and 30, the pencil 56 will make a record similar to that indicated by the line o in Fig` 11. The distance of any point in said line from the line r, s is proportional t0 the draw bar pull and' by properly spacing the lines t, they draw bar pull can be readily estimated. The record sheet 50 is also pr0- vided with a series of lines 'w equally spaced and which extend at right angles to the lines 25. The lines 'w correspond to intervals of time and the use thereof will be readily understood by those skilled in the art. lt willbe noted in Fig. 1l that part of the los record v is to one side of the line r, s rand another partto' the opposite thereof. These two portions correspond, one to a relatively separating movement of the draw bar extensions 29 and 30, and the other to a relative approach of said draw bar extensions 29 and 30.

In order to record the work done during any blow or pull, l have provided thefollowing mechanism.

Referring-more particularly to Figs. 3, e, 5 and 10, it will be seen that there is a bridge' 58 which extends from one arm 129 to the other arm 129 over the draw bar extension 30. Pivotally mounted on said bridge 58 is a lever arm 59 which, at its free end. carries a pencil 60.` The pencil 60 is adapted to eoperate With a record sheet G1 carried by a cylinder 02 mounted as hereinbefore described. Normally, the pencil 60 is kept out of engagement With the sheet 61 bymeans of a spring 63. The lever 59 is, however, provided with an armature 64C which is adapted to coperate With a magnet 65 carried by said bridge 58. Suitable electrical connections are made with the magnet 05 so that the current may be caused to energize the magnet at any instant to thereby pull down the lever 59 and cause engagement of the pencil 60 vvith the record sheet 61. The cylinder 62 is rotatablyy carried by a suitable casting 66 rigidly mounted on the draw bar extension 30. the axis of the cylinder 62 extending parallel to the axis of the draw bar extension 30. The shaft 67 which carries the cylinder 62 is provided at one end-With a beveled gear 68 which meshes with another beveled gear 69 carried on the inner end of a flexible shaft 70. The shaft 70 is connected at its opposite end with the armature of a motor indicated diagrammatically at 7l, the motor being mounted on a part of the car underframe. Also carried by the draw bar extension 30 is a speed indicator 72 which is Connected by a `belt 73 to the shaft 67'tliat carries the cylinder 62.

The cylinder 02 isy driven at relatively high speed from the motor 7l, the speed being determinable by means of the speed indicator 72, as Will be apparent. instant a blow is being transmitted to either of the couplers or dran*y bars, the operator will energize the magnet (35, thus causing the pencil to engage the rapidly' rotating record sheet 6l. wWithout any relative movey ment between the draw bar extensions 29 and 30, the pencil G0 will make a line corresponding to that referenced .r in Fig. 10. As soon asy the blow is transmitted to the draw bar extensioina record will befmade corresponding to that indicated at y in 7Eig. 10. In actual practice, the-time required for making this record Will'be a relatively small fraction of a second. Ido not deem it necessary to enter into a detailed descrip- At the gears, to Which reference is hereby made. As

described in said patent No. 1,217 ,9S-1, the recording mechanism is designed for coperation with a hammer Vof 9,000 lbs., for Which reason the draw bar and draw bar extensions in the dynamometer car herein described are made of similar weight, to facilitate reading of the record cards.

The method by Which the record is actually read and the Work performed, calculated, is described more fully in my Patent No. 1,225,687, issued May 15, 1917, for improvement in indicators.

F rom the preceding description, it Will be seen that, when a sudden shock is transmitted to either of the draw bars and its extension, a certain amount of 'Work will necessarily be performed in accelerating the 9,000 lb. draw bar and itsr extension from a relatively zero velocity to a higher velocity. Knowing the Weight which is thus accelerated and from the record card made of the operation, the time during which they Ving mechanism for registering the draw bar pull, a continuous record is provided which shows the operating conditions of the car at all times during a continuous run. It will also be noted that the tivo sets of recording mechanisms are so arranged that they cooperate With both draw bars and extensions.

I have herein shown and described What I novv consider the preferred means of carrying out my invention, but the same is merely illustrative and as will be apparent to those skilled in the art, various changes and modifications may be made in the details of construction and arrangement of parts Without departing from the spirit of the invention.

I contemplate all changes and modifications that come Within the scope of the claims appended hereto.

I claim:

1. In a dynamonieter car, the combination with a yieldingly mounted draw bar and extension of a predetermined relatively heavy Weight, of mechanism associated with said draw bar and carried by the car for recording the rate of acceleration of the dranr bar and its extension when a sudden shock is transmitted thereto.

2. In a dynamometer car, the combination withv a pair of longitudinally movablehdraiv bars having extensions, the draw bars and extensions being yieldingly mounted With Las respect to the car and each being of a predetermined, relatively heavy weight, of mechanism associated with both of said draw bars and extensions and the car for recording the rate of acceleration of either draw bar and its extension when a sudden shock is transmitted thereto.

3. ln a dynamometer car, the combination with a pair of oppositely arranged draw bars, each vieldingly longitudinally movably mounted with respect to the car proper, of a single recording mechanism associated with both of said draw bars and adapted to indicate the draw bar pull of either.

a. In a dynamonieter car, the combination with a pair of oppositely arranged draw bars each vieldin Olv longitudinallv movablv 7 u C n, .l

mounted with respect to the car proper, or" an intermittently operable recording mechanism associated with both orP said bars and adapted to register the rate of acceleration of either of said draw bars upon transmission of a sudden shock thereto.

5. In a dynamometer car, the combination with a pair ot draw bars having extensions, said draw bars and extensions being each of a known heavy weight, of means for supporting said draw bars and extensions to permit independent longitudinal movement thereof and at the same time maintain the draw bars and extensions in the same horizont'al plane.

6. in a dynamometer car, the combination with a pair or" oppositely arranged draw bars and extensions each independentlyv longitudinally movableA with respect to the car proper, the extensions overlapping each other, of recording mechanism associated with said draw bar extensions, said mechanism including' elements rigid with respect to a portion ot one draw bar extension and other elements movable in unison with the other draw bar extension whereby relative movement betwen the draw bar extensions is reproduced on the recording mechanism.

with two relatively longitudinally movable y heavy members adapted to be movable in unison with the movements of respective couplers at the ends oit the car and each independent of the car, ot a recording nischanism associated with said members said recording vmechanism ybeing l adapte for operations during short intervals of time.V

and arranged to indicate the amount Iand rate of relative movement between saidtwo members.

9. ln combination, a car having sills, stop castings secured to said sills, said stop castings being each provided with three sets of main stops arranged longitudinally one behind the other, of two members mounted between said stop castings, one of said meme bers being arranged for movement in unionly upon movement of either of said mem.

bers.`

10. ln combination, a car having sills, stop castings secured to said sills, said stop castings being each provided with three sets of main stops arranged longitudinally one behind the other, of two members mounted between said stop castings, one of said mem bers being arranged for movement in unison with a. coupler at one end of the car and the other member adapted formovement in unison with a coupler at the opposite end of the car, three sets of springs and followers operatively associated with said stop castings and said members, and means associated with said members arranged to actuate two sets of springs and followers only;

upon movement of either of said members, and recording mechanism associated with said members to indicate their movement relatively to each other.

11. ln a dynamometer car, the combination with a draw bar and extension at onek said cylinder, there being a flexible driving,

connection between the motor and said cylinder.

l2. In a dynamometer car, the combination with a horizontally movable member of 9,000 lb. weight and moving in accordance with the movements oit' a coupler, ofan in.

termittently operable recording mechanism associated with the car and said member and arranged to indicate the relative movements acceleration of said 9,000 1b. member when a therebetween, said mechanism including a sudden shock is transmitted thereto. rapidly moving sheet, a stylus normally out In Witness that I claim the foregoing I 1C of engagement therewith, and means coacthave hereunto subscribed my name this 5th 5 ing With said stylus for placing the latter in day of Sept. 1916.

operative engagement with the sheet at any desired instant to thereby record the rate of JOHN F. OCONNOR.

opies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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