US1366676A - Hand-brake for railway-cars - Google Patents

Description

HAND'BRAKE FOR RAILWAY CARS.

APPLICATION FILED sEPT.25, I9I9. RENEWED DEC. I8. I92o.

1,366,676. Patented Jan.v25, 1921.

2 SHEETS-SHEET l.

I" III J. F. OCONNOR. HAND BRAKE FOR RAILWAY QARS. APPLICATION FILED sEPLz, I9I9. REIIEwE DEC. I8. I92o.

Patented Jan. 25, 1921.

- 2 SHEETS-SHEET 2.

PATNT oFricE.

UNITED STATES .roiiN pcoivivon,

OF CHICAGO, ILLINOXSQASSIGNOR TO WILLIAM H. MINER, CRAZY, NEW YORK.

`HANDIBRAKE FOB; RAILWAY-CARS.

Application led September 25, 1919, Serial No. 326,125. .Renewed December 18, 192D. Serial No. 431,786.

To all whom t 'may concern.'

Be it known that l, JOHN F. QCQNNOR, 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 l-land-Bralres for Railway-Cars, of which the following is a full, clear, concise, and enact description, referw ence being had to the accompanying drawings, forming a part ot this specification.

Thisinvention relates to improvements in hand brakes for railway cars:

The object of the invention is to provide a hand brake suitable for railway freight cars and wherein is obtained a high leverage ratio, the parts being compactly arranged and easily operable in the usual manner. H .f

' In the drawings forming a part otthis specification, Figure 1 is a top plan view of a hand brakeoi the vertical staff type showing my improvements in connection therewith, a portion ot a car end wall beinniindicated to bringout the position ot the brake with respect thereto. Fig. 2 is a-vertical sectional View upon an enlarged scale taken on the line 2 2 of Fig. 1, parts being broken .away in order to prevent crowding of the.

drawing'. Figs. .3 and 4'are horizontal sectional views taken on the lines 3-3 and 4--4 respectively, of Fig. 2. And Fig'. 5 is a de- 'tail elevational view to illustrate the locking doe` employed with my improvements.

Fig. 6 is a view similarfto Fig. 1 andillustrates another embodiment of the invention. Fig. 7 is a vertical sectional view taken substantially on the iine 7-7 of Fig. 6; And Fig. 8 is a horizontal sectional View talrenon the line 8-8 of Fig. 7.

Referring `first to the construction illustrated in Figs. 1 to 5, inclusive. l0 denotes the end wallof a y ondola or other freight car and 1-1 a vertical brake staff such as is Y ordinarily. used on 'freight cars. @n the upper end of the stati 11 is rotatably mounted a hand wheel 12 of usual diameterfand rim so that the bralreman is enabledto operate it in the usual manner. Said hand wheel 12 is provided with a hub 13 which is loosely rotatably mounted on the rounded V section 14 ot' the staff. the hand wheel being prevented from accidental removal by any suitable means-such as the washer 15 and nut 16. V

The hub 1.3 is iiituin rotatably mounted the rounded section 14 of the stali 11 piovided inthe hub 18 is, however, eccentric, as appears from Fig. 3, the function for this Aconstruction being explained hereinafter.

The hub 13 is provided with a radial lug 21 which worksin` an arcuate slot 22 provided in the sleeve 17 so that the hub 13 is permitted a limited amount of rotation with respect to the sleeve 17 and suiiicient to bring the bearing Jfor the staff 11 concentric with they axis of the vsleeve 17. ,y

:Below the hub 18, the stail 11 is provided with a squared section' indicated at 23, on which is ynon-rotatably mounted a pinion 24. The teeth oi" the pinion 24 mesh with `an internal iiXed gear 25 oi larger diameter, the gear 25 being concentric with the sleeve 17,

so that, when the hub 13*and the bearingY for the upper end of the steli 11 are rotated so teeth 27' is a gravity. controlled dog 28 piv,

otally mounted ona stud 29 cast integral with the .upstanding flange 19 of `the bracket 20. i 1

The operation isas follows; Assuming the parts as shown by the lull lines-in Figs.

1, 2` 3 and 4, to windup the brake chain, the

brakemanturns'the'hand wheel 12 inthe direction indicated by the arrow a in Fig. 1. In this condition, it will beA noted' that the lug 21 of the hub 18 isbearing againstthe corresponding shoulder 121 of the sleeve 17, and, consequently, the sleeve 17 will be moved in unison with the rotation of the hand wheel 12. This. causes the pinion 24 to roll along the internal gear 25 and reas to bring the'axis of theY staff 11 into ooincidence with vthe axis or centeroi the in-l main enmeshed therewith., Due to thedifference in number of teeth on the pinion 24 and internal gear ,25, itisev'ident that rela-` Y 50 dicatedat 407 tive rotation between said pinion and internal gear will take place, the amount of rela- Vinfnumberof teeth. In the drawing I have 5 shown approximately Jforty teeth in the Vin-V ternal gear and approximately thirty on the pinion 24, sothat, for a complete revolution Vv"ot' the hand Awheel 12, the staff 11 will be roftated in the reverse directionthat is cunter-clockwisc-approximately onethird of` a revolution 1With this differential planetary gearing', it is evident that the leverage ratio is appreciably multiplied and may be made as great as desired, consistent vl with'` theV necessary speed in winding up the brake chain. The gravity dog 28 will automatically coperate with qthe'teeth`27 of the ratchet wheel and prevent any possible accidental release of theparts. To effect revlease of theY Abrake chain, the brakeman merely turns the hand wheel 12 n the reverse direction--that is, counter-clockwise which will permit the .'hub 13 to rotate Vwith respect to the sleeve 17 a distance corresponding to the length of the arcuate slot'22. @As this-relative' rotation between the hub V13 and sleeve l'oc'curs', the pinion '24C isY dis engaged from the internal gear 25,` thereby leaving the staff ll'free to rotate under the the chain,the brakeman :rotates thevvheel 12 inthe usual manner and lthere will be a short period of lost motion'while the lug 21 is traveling in the arcuate slot 22,*after which operation is as above described.

In the construction illustrated inFigsB,

7 and 8, thearrangement is much the saine except Vthat no provision 'is made for disen- Agaging the pinion Afrom the internal gear, and to release the brakechain, the brakeman is requiredto rotate the hand wheel in a `direction the reverse of that employed in the winding o eration. a ,Y

In said igs. 6, 7 and 8, the hand wheelis designated as 112 and has a depending flange 113 serving as'ahub, said flange 113 being `loosely Vrotatably seated vonan upstanding flange 119"formed integral with the bracket '120. The hand wheel 112 hasa bearing, in-

centric Vwith respect to the hub ange 113.

Below 'the circular section 114, thejstaff is *provided* with a squared section 123 'on "which is non-rotatably mounted a pinion 124,"saidfpinion meshing with an internal stationary 631" 125 formed on the inner-side of'said'flange 119. The hub flange 113 isprovided along its V60' undersurace with a 'series of radially-ar `ranged `teeth 127, withwhich coperaties a gravity controlled jpivoted dog 128'having `Y`-arelease'handle-41.

'Thejop'eration isas follows: To lwindup Vated member for the upper circular sectionA A114: of the Stal? 111, whichl bearing 410 is ec n `and a hand wheehcf a tated in the direction indicated by the arrow b-that'is, clockwise. This causes the Vtive rotation 'depending upon the'dnfferencel eccentrically vmounted stai to travel-with its a' pinion 1241 around the internal gear `125,

thereby causing relative rotation between 7oV `the gear 125 ,and the pinion 124.l The vamount Vof relative rotation, of course, depends upon the dii'erence Vin the number of teeth between the pinion and fthe gear, which may be made as small or as great .as desired to obtain -the necessary leverage. ratio. As a precautionary measure, the dog 128 is employed to retain the wheel against accidental reverse rotation. To lrelease the brake chain, the operator disengages the locking dog 128 and rotates the hand wheel in a counter-clockwise direction until 4the necessary slack in the chain'V has been obtained. Y i

I claim: l f v K 1. Ina brake of the character described, the combinationwith a verticalv staff' having a pinion rotatable in unison therewith, of a liXed internal gear surrounding and coperable with said pinion, and means toreo 'ftween'the pinion and gear and thus rotate Y 'ithestaff.,v tension on the brake chain. To Vagain wind bracket arranged to be attached to the wall ofy a car, of an internal gear xed with respect to said bracket, a pinion rotatable in unison with the staff and a manually operrotatably mounted on the bracket and rotatable about the same axis as that of said gear, said member having an eccentric bearingfor the stai.` y

- V3. In a'brake 'of the character described, the combinationlwith a vertical brakestai, o1 a hand wheel having a hub provided with an` eccentric bearing for the'upper end 'of said staff, a stationaryA internal gear with its axis coinciding with the axis'of rotation of the 'hand wheel, and a pinion of aV lesser 'number of teeth than `said gear and xedon Vthesta andcoperable withjsad internal gear. l Y a f 4. In a device of the characterdescribed, the combination with aVV verticalV brake staff Y system of planetary gears'inter'posed between 'said hand wheel and the staff including, onegear fixed to the staff, andrmeans for effecting the release of said gears to render them inoperative vand thereby release the staff. i V

f5. In a brake of the character described, the combination with a 'brake staff, Vand a bracket arranged to be attached to the wall of a car, of'an internal gear xed withre- `spect to 'saidbrackeu apinion rotatable in I unison with the stair' and'a manually voperated member rotatably mounted on the "bracket and rotatable about the same'axis asf130 p that of said gear, said member having an eccentric bearing for the staff, and means cooperable With said member and the bracket for shifting the bearing of the sta to a position concentric With the gear to thereby release the stai.

6. In a brake of the character described, the combination with a fixed bracket and a vertical brake staii, of a hand Wheel loosely rotatably mounted on the top of the staii', said hand Wheel providing an eccentric bearing for the upper end of the staff, a pinion mounted on said sta-if to rotate in unison therewith, and a fixed internal gear with Which said pinion coperates, said hand Wheel being rotatable about an axis coinciding With the axis of the internal gear.

7 In a hand brake for railway cars, the combination with a bracket secured to a car Wall and having a fixed internal gear, of a vertical brake staff having a pinion near the upper( end thereof rotatable in unison with the staii, said pinion normally meshing With said internal gear, a hand Wheel having a hub, said hand Wheel and hub being rotatable about an axis coinciding with the axis of said internal gear, said hub having an eccentric bearing for the staff and a Y member loosely rotatably mounted on said bracket about an axis coinciding with the axis of the internal gear, said hub and member having a predetermined amount of lost motion therebetween to thereby permit shift ing of the eccentric bearing of the staii.

In Witness that I claim the Aioregoing I have hereunto subscribed my name this 8th day of Sept., 1919.

JOHN F. CONNOR.

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