US818642A - Bolster swing-damper. - Google Patents

Description

No. 818,642. PATENTED APR. 24, 1906. W. G. PRICE.

BOLSTER SWING DAMPER.

APPLICATION FILED FEB.20. 1905.

2 SHEETS-SHEET l.

' g N as 8x I uzul'oz Q Vihwoow O No. 818.642. PATBNTED APR. 24, 1906,

W. G. PRICE BOLSTER SWING DAMPER.

APPLICATION FILED FEB-20.1905.

2 SHEETSSHEET 2.

- Mk R \mnmulwmm flnuenfoz jwwfizh I modification.

UNITED STATES PATENT OFFICE.

BOLSTER SWING-DAMPER.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed February 20, 1905. Serial No. 246.555.

To all whom it may concern:

Be it known that I, WVILLIAM G. PRICE, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of 5 Pennsylvania, have invented certain new and useful Improvements in Bolster Swing- Dampers ;'and I do hereby declare the follow- Q ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in controlling means for bolsters of car-trucks, and particularly to means for frictionally resisting movement of such bolsters and means for varying such friction.

One object in View is the obviation of the longitudinal swing of a bolster within a truck while leaving the bolster free to have all the necessary movement for absorbing shocks received during transit.

A further object is the provision of means for resisting the movement of a bolster in a ratio proportionate to the weight sustained by the bolster.

With these and many other objects in view the invention comprises certain novel constructions, combinations, and arrangements of parts, as will. be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 represents a transverse vertical section through a portion of the truck, illustratin an embo iment of the present invention. ig. 2 represents a transverse vertical section taken on the plane indicated by line 2 2, Fig. 1. Fig. 3 represents a top plan view of a fragment of a pair of transoms and bolster provided with a modified embodiment of the present invention. Fig. 4 represents a transverse vertical central section through the embodiment of a further modification. Fi 5 represents a similar view of a still furt er The present invention relates to the class of structures disclosed in my former application, Serial No. 232,504, filed by me on the 12th day of November, 1904, and has the same general object in view, with the addition that the resent structures are designed for varying t e friction upon the bolster, as will hereinafter fully appear. I

In the application above referred to I have disclosed a bolster. mounted to swing longitudinally between a air of transoms and spring-arms frictionaly engaging the said bolster for resisting the longitudinal movement thereof and, as will be seen by reference i to theaccompanyin drawings, I employ in i the present improved structure the same general conception with certain additions involving a longitudinally movably mounted bolster 25, arranged between the transoms 26 l 26, said bolster being supported by the usual elliptic springs 27 27, carried by the pivotallymounted U-shaped hangers 28 28. The hangers 28 may be connected by the ordinary i cross-bar 29, so as to swing together, the bolster 25 being thus left free to swing transversely of the truck carrying the same. Arranged transversely of and beneath the bolster 25 is a supporting-plate 29, which has its ends upturned, as at 30, each of said ends being formed with a series of apertures 31 31, any one of which is adapted to receive a transom 26. The plate 29 is thus adapted to be rigidly secured to the transoms 26 and may be adjusted toward or away from the same by removal of the bolts 32 and replacing the same in a higher or lower aperture 31, as desired. A spring 33 is carried by the plate 29 and preferably secured thereto by any suitable bolt 34, said spring 33 extending transversely of the plate 29 and longitudinally of the bolster 25, the spr1ng 33 being formed with spring-arms extending m opposite directionsfrom the bolt 34,- the ends of the spring-arms, being flattened, as at 35 35, and engaging the flattened under surface of the bolster 25 for frictionally resisting longitudinal movement of the bolster, the frictional contact of the said spring-arms against the bolster bein designed to be increased or decreased by a justment of the plate 29 by means of the apertures 31 and bolts 32.

In assembling a truck embodying the features of the present invention it is obvious that the spring 33 may be positioned as 1llustrated and the bolster 25 then placed upon the same, so that the'spring 33 will be depressed by said bolster to a given degree relative to the weight of the bolster and the resistance of the springs 27 and spring 33. hus it will be apparent that as a car provided with a truck embodying the features of the present invention becomes heavily loaded the bolster 25 will sink as the springs 27 glve way under the increased weight, and such lowering of the bolster 25 wlll of course exand the arms of spring 33 and increase the friction of the flat portion 35, so that the bolt 32, extending through the corresponding IOC frictional resistance of the spring 33 to the 4 frictional resistance of spring 33 to such movement will increase proportionally, due to the depression of said spring, whereby the damping efiect of said spring 33 is pro ortionate to theforce of the thrust of the olster.

It is to be noted that if from any cause the resistance of the sprin 33 is insuificient when the bolts 32 are passe through the apertures 31 of the upturned ends of the plate 29 such resistance ma readily be increased by removing said passing the bolts 32 through a higher set of a ertures 31. Thus the frictional resistance 0 the spring 35 will not only be varied relative to the pressure upon the bolster'25, but may be altered and adjusted as required by the adjustment of the bolts' 32.

As illustrating further embodiments of the present invention I have shown in Figs. 3,-

4, and 5 several constructions which demonstrate various methods of frictionally resisting the longitudinal thrust of the bolster, means bein provided for varying such resistance. or an understanding of such embodiment of the invention reference is had to the drawings, and first with respect particularly to Fig. 3, in which 1 indicates a bolster arranged between transoms 2 2 and engaged by arms 3 3, each of said arms 3 being pivoted, as at 4, to its respective transoms 2 and being provided with a relatively large flat face engaging the respective side of the bolster 1. Bolts 5 5 are threaded through the transoms 2, each bolt being arranged opposite the flat face of the respective arm 3 andeach of said bolts carrying at its inner end a cup 6, inclosing the outer end of a coil-spring 7, the inner end of each of said springs engaging the flat face of the respectlve arm 3. A suitable jam-nut 8 is threaded onto each of the bolts 5 for locking the same in its given position, said nut being desi ned to be loosened and the bolt5thre'ade inwardly or outwardly for increasing or decreasing the tension of the spring 7 and correspondingly increasing or decreasing the frictional engagement of the .arm 3. VlTh'cn the bolts 5 have been given the desired adjustment, the nuts 8' are threaded home against the sides of the transoms 2 or against a bushing interposed between the respective olts, raising said plate, andlongitudinally nut and the respective side of the transom for binding the threads of the respective bolt and preventing movement of such bolt. In operation when from any unevenness in the track or other cause the bolster 1 is thrown to one side the frictional contact of the arms 3, while resisting such movement, will permit a sufficient amount for taking up the vibration and upon the return stroke of the bol-' ster the further resistance of the arms 3 will bring the bolster to a standstill. It is to be observed that the frictional engagement of the arms 3 is such as to exert an even unchanging resistance to the movement of the bolster, and employment of said arms has the further advantage over structures heretofore known in the art of damping the movement of the bolsterwithout resiliency, tending to prolong the longitudinal thrusts of the bolster, this advantage being also present in the structure seen in Figs. 1 and 2.

The modification seen in Fig. 4 embodies the conception disclosed in Fig. 3 and involves a bolster 9, arranged to swing between transoms 10 10. Mounted within the bolster 9 is a turnbuckle 11, designed to be lengthened or shortened by having one of its mem bers threaded into the other. Each of the members is provided at its outer end with a cup 12, inclosing the inner end of a coil-spring 5 13. Each of the springs 13 extends through the respective side of the bolster 9 and car-. ries at its outer end a cup or slide 14, slidingly contactin with the respective transom 10.

In this em odiment'of the invention it is only necessary to lengthen or shorten theturnbuckle 11 for increasing or'decreasing the tension of the springs 13, whereby the friction of the slides 14 against the transoms 10 may be increased or decreased. The operation of 10 5 .Each ofthe transoms 16 is apertured, as at 17, and carries a bracket 18. A bolt 119is threaded through each bracket 18 and carries at its inner end a cup 20, each of the cups 20 inclosing the outer end of a coiled spring 21, each of said springs 21extending through therespective apertures 17 and carrying at I2 its inner end a cap or slide 22, frictionally' contacting with the side -of the bolster 15. A jam-nut 23 is carried by each" of the bolts 19 for bein threaded into contact withithe r'espective racket-18 for locking the respective 1 2 5 bolt in an 'ven adjusted 'osition, each of said bolts emgdesigned to 'e adjusted longitudmally by bein threaded inwardly or outwardly through'tIm respective bracket.

In eachof the embcdimentsof the inven- 13 tion' as disclosed in Figs. 3, 4, and 5 the friction-creating devices are adjustably mounted so that the same may be withdrawn for facilitating the introduction of the bolster to its normal position between the transoms, and after such positioning of the bolster the said friction devices may be adjusted to a position for frictionally resisting movement of the bolster. The structure seen in Figs. 1 and 2 of course is capable of permitting the bolster to assume its normal position readily, and after the bolster has assumed such position, if it is found that greater friction is desired the supporting-plate for the spring may be adjusted for givm the required friction. Therefore in each of t e embodiments herein disclosed the friction device is susceptible of admitting the bolster to its normal position and is designed then to be adjusted to the required condition for applying such resistance to the movement of the bolster as may afford the best results.

In each of the embodiments of the present invention is seen the eneric conception of controlling the longitu 'nal swing of abolster by friction and of varyin the friction for governing the movement 0 the bolster to the greatest advantage.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a bolster-controllin apparatus, the combination with a movab y-mounted bolster, of a spring frictionally resistin movement of the same, and a support or said sprin adjustable with respect to the bolster.

2. In a bolster-controllin apparatus, the combination with a movab y-mounted bolster, means for frictionally resisting movement of the bolster in varyin de ees relative to the weight sustained y t e bolster and means for adjusting said friction means.

3. In a bolster-controllin apparatus, the combination with a movab y-mounted bolster, of a spring arranged beneath said bolster and adapted to have its ends engage the bolster for frictionally resisting movement of the bolster, and vertically-adjustable means supporting said spring.

4. In a bolster-controllin apparatus, the combination with a movab y-mounted bolster, of a spring bent intermediate its length and having its ends resting against the bolster for frictionally resisting movement therei of, and a support en aging said spring intermediate the length t ereof.

5. In a bolstercontrollin apparatus, the combination with a movably-mounted bolster, of a spring designed to frictionally engage said bolster and mounted adjustably with respect thereto.

6. In a bolster-controllin apparatus, the combination with a movab y-mounted bolster, of an adjustable spring positioned for frictionally resistin movement of said bolster and for having its frictional contact with the bolster varied relative to the weight sustained by the bolster.

7. In a bolster-controllin apparatus, the combination with a movabI -mounted bolster, of,a spring frictionally resisting movement thereof positioned for having its frictional contact varied relative to the vertical movement of the bolster and means adjustably sustaining said spring in position.

8. In a bolster-controlling a paratus, the combination with a bolster, of a spring designed to frictionally engage the same for resisting movement thereof, and means for supporting said spring at various points of adustment toward and away from said bolster.

. 9. In a bolster-controlling apparatus, the combination of a movably-mounted bolster, and adjustable means en aging the under surface of said bolster for Irictionally resisting movement thereof.

10. In a bolster-controlling apparatus, the combination with a movably-mounted bolster, of adjustable means fixedly sustained with respect to said bolster beneath the same and frictionally engaging the under surface of said bolster for resisting movement thereof.

11. In a bolster-controlling apparatus, the combination with a movably-mounted bolster, and transoms fixed with respect thereto, of a plate secured to said transoms, and a sprin carried by said plate arranged beneath said olster for frictionallyresisting movement thereof. 4

12. In a bolster-controlling apparatus, the combination with a movably-mounted bolster, of an adjustable spring normally fixed against movement with res ect to said bolster in position for having its deflection vabolster.

13. In a bolster-controlling apparatus, the combination with a movably-mounted bolster, of a sprin bent intermediate its length in position wit its ends resting against the bolster for frictionally resisting movement thereof, and an adjustable support for said spring enga ried relative to the vertical movement of the 14. In a bolster-controllingapparatus, the combination with a movably-mounted bolster, of a spring bent intermediate its length and having its ends resting against the bolster for'frictionally resisting movement thereging the springat the point of the -bend therein.

of, and supporting means forsaid spring, ad

justably mounted and adapted to be adjusted transversely of the bolster.

15. In a bolster-controllingapparatus, the combination with a rigidly-mounted support,

of a bolster movable with respect to said suport, and a spring bent intermediate its Iength and having its ends frictionally engaging said bolster and its intermediate bent portion engaged by said support.

16. In a bolster-controlling apparatus, the combination with a movably-mounted bol- &

. said bolster, and means carried by said late for frictionally resisting movement o the the bolster.

combination with a movably-mounted. bolster, means for frictionally resisting movement of the bolster, means for adjusting said frictional means toward and away from the bolster for varying the operation of the frict1on means.

17. Inan apparatus for controlling a bolster, the comblnation with a movably-mountedbolster, of a transom at the side thereof, a spring carried by said transom and frictionally resisting movement of said bolster, and means for facilitating adjustment of the spring for varying the tension of said spring.

18. In an apparatus for controlling a bolster, the combination with a movably-mounted bolster, of a transom at the side thereof, and a spring carried by said transom and en gaging said bolster for frictionally resisting movement thereof, said spring being positioned for having its tension varied in a ratio proportionate to the vertical movement of 19. In a'bolsterecontrolling apparatus, the combination with a movablymou nted bo1 ster,'of an arm frictionally contacting therewith, and means for varying the friction of said arm.

20. In a bolster-controlling apparatus, the combination with a movably-mounted b01- ster, of an arm frictionally contacting therewith, and means for increasing the friction thereof. 11

21. In a bolster-controlling apparatus, the combination with a movably-mounted bolster, of a spring'fixed with respect to said bolster beneath the same and frictionally engaging the bolster for resisting movement thereof.

22. Ina bolster-controlling apparatus, the

ster, of a spring fixed with respect to the bolster and en aging the under surface thereof for frictiona ly resisting movement of the bolster. 23. In a'bolster-controllin ap aratus, the combination with" a longitu 'nal iy movably mounted bolster and transoms fixed with respect thereto, of a plate secured to said transoms, and means carried by said arranged beneath said bolster for frictionall resisting the longitudinal movement thereo 24. In a bolster-controllin ap aratus, the combination with a longitu 'naiiy .movably mounted bolster and transoms fixed with, respect thereto, of a plate carried by said transoms arranged transversely with respect to bolster.

.25. In abolster-controlling apparatus, the

combination with a movably-mounted bolcombination with a movab ster and a support spaced therefrom, of a late and ster and transoms fiat-ed with respect thereto, 1 1

spect to said bolster for varying said resistance.

27. In a bolster-controlling ap aratus, the combination with a longitudina ly-movable bolster, of adjustable means for frictionally damping the longitudinal movement of the bolster, the friction of said damping means .varylngin a'ratio proportionate to the weight sustained b the bolster.

28. In a olster-controlling apparatus, the combination with a movably-mounted bolster and aspring arranged lon itudinally -of thebolster and engaging the und er face thereofand a support arranged transversely of the bolster'bene'ath the same carrying said spring.

29. In a bolstercontrolling apparatus, the

combination with a swinging bolster, of a spring disposed for assisting in sustaining the weight of the bolster and arranged to frictionally resist the longitudinal or swinging movement of the bolster. 30. In a bolster-controlling apparatus, the combination with a movably-mounted bol- -ster,of a spring having-flat surfaces directly engaging the olster and arranged to frictiona 1y damp the movement thereofina ratio proportionate to the rise and fall of the bolster. 1

31. In a bolster-controllin apparatus, the

l y-mounted bolspring integposed between the bolster and support an .f'rictionally resisting longitudi nal orswinging movement of the bolster, the Wear due to friction being taken up directly bythe spring.

32. In a bolster-controlling apparatus, the

combination with amovably-mounted bolster, of a sprin positioned-beneath the same and an adjusta le supportextending beneath said bolster and sustaining said SPIlIlgiIl position for frictionally resisting movement of the bolster.

In testimony FRED SCHUTTE, WALTER BURKE.

wiereof I aflix my signature 1n presence of two Witnesses.

IIS

Images