US1266278A - Car-brake mechanism. - Google Patents

Description

1. KIRBY. 1R. CAR BRAKE MECHANISNI. APPLICATIUN FILED NOV..15. 1917.

Patented May 14,1918.

FATTE s narran s'rafrns rara OFFlCE.

JOHN KIRBY, JR., OF IDJYSF'LON,l OHIO- ASSGNOR TOTHE DAYTON MANUFACTURING COMPANY, OF DAYTON, OHIO, A CORPORATION F OHIO.

CAR-BRAKE MECHANISM.

Specification of Letters Patent.

Patented May le, 1918.

Application filed November 15, 1917. Serial No. 202,142.

To all whom it may concern.'

Be it known that I, JOHN Knaur, Jr., a

citizen of the United States, and resident of panying drawings. which form a part of my specification.

My invention relates to an improvement in car brake mechanism, and more particu-y larly to that class wherein the handle vor operating lever ywhen turned in onedirection rotates the brake-shaft, and when turned in an opposite direction willY niove indeiendently of the brake-shaft. The invention further relates to brake operating mecl'ianisni wherein the normal or inoperative position of the operating lever is substantially parallel with the brake-shaft and wherein the operative position. of said lever is at right angles to the shaft.

The object of my invention is to produce a brake operating mechanism wherein a ratchet wheel .is fixedy to or formed on the brake-shaft and a spring actuated ratchet engaging member is mounted on the oporating lever in such manner as to permit it to engage either of the teeth of the ratchet wheel to rotate the brake-shaft ina winding direction to apply the brakes, and to automatically move out of the path of said teeth when the operating lever is moved in the opposite direction, and when the latter is dropped to its normal. position parallel with the brake-shaft.

`With the aforesaid and other objects in view the invention consists in the various novel details of construction'and combination of parts. hereinafter fully described in the specification, illustrated in the drawings and more particularly pointed out in the claims.

In the accompanying drawings forming part of the specification. and in which like reference characters indicate corresponding parts, I have illustrated one form of brake operating' mechanism embodying the essenw tial features of my invention, although the same may be carried into effect in other ways without in the least departing from the spirit thereof.

In the said drawings:l y

Figure l is a side view of the device partly in elevation and partly in section taken on the line A-A in Fig. 2, the operatnig lever being shown in its operative position by solid lines and in its inoperative position by dotted lines. i

y Fig. i) is a top plan View of Fig. l, the sectioned portion being taken on the line B-B ofFig. l.

Fig. 3 is a broken side view ofthe connecting end of the operating lever detached.

Fig. l is a perspective view of the ratchet engaging member detached.

Fig. 5 -is a sectional view through the Vlateral chamber showing the restraining de* vice and the adjacent extension with which it cooperates to hold the operating lever against dropping of its own weight.

Referring to the drawings, l .is the brakeshaft, the lower portiony of which may be.'

journaled in the car platform in the usual manner, and it may be provided With the customary pawl and ratchet Wheel mounted on the platform to hold the brakeshaft against retrograde movement during thel processl of setting the brakes and thereafter until the pawl is released by the foot ofthel operator. This mechanism is not shown for the reason that it constitutes no' part of my invention and is familiar t-o all those having knowledge of such matters. 2 is ratchet` member mounted upon and rigidly secured tothe shaft,in the present instance by means of pins 3, il., which pass through the ratchet member 2 and the shaft l, although this ratchet member may be formed integral with the shaft in lieu of forming it in aseparate piece. .ln order to reduce the ratchet member to a diameter which shall not he ohliectionable the shaft is reduced at 5 andthe hole through the ratchet member is made to conform therewith. The ratchet member 2 is provided with a series of vertically disposed teeth 6 arranged around its periphery immediately opposite the reduced portion of the shaft and which terminate below the upper end of the said member, leaving a portion 7 of the latter extending above.- the teeth to receive the pin 3, as shown in F ig. l.

Surrounding the ratchet member 2 and resting upon the top thereof there is loosely mounted upon the shaft a sleeve member or cylinder 8 held in place on the shaft by a nut 9 which engages a reduced threaded end 10 thereof. This sleeve `is adapted to be rotated in either direction independently of the shaft and it is provided, at one side thereof, with lateral extensions 11, 1Q, having a top portion 113 forming an extension of the top ofthe sleeve, the Wall of which is out away betiveen the said lateral extensions. The said extensions together with a front portion 1a form a housing for an operating lever about to be described, t ie lower edge of the portion lil forming a stop which limits the upward movement of said lever. An operating lever 15 is pivot-ally mounted upon and between the said lateral extensions by means of a bolt 16 which passes through the said extensions and through the operating lever having a head 17 at one end and a perforation to receive a cotter pin 18 at the opposite end, to prevent undue displacement of the bolt. The operating lever being thus pivotallv mounted when in its normal or inoperative position hangs suspended upon the pivot bolt 16 substantially parallel with the shaft as shoivn by dotted lines in Fig. 1, and when in operative position the lever occupies a horizontal position, as shoivn by solid lines in said Fig. 1. The operating lever is in part hollow and at its connecting end forms a cham er in which there is mounted a ratchet engaging member or vertically disposed spring actuated paivl 19 operative upon a pintle F20 screwed into and through the top vvall of the lever and passing down through the body 21 of the pavvl into and through the bottom Wall of the lever. llhe free end of this pavvl entends outwardly through the open end of and beyond the end of the operating lever and engages behind the teeth 6 of the ratchet member 2 as the latter is rotated in a direction to set the brakes, Which operation is accomplished by turning the operating lever in the direction indicated by the arroiv in Fig. Q. W hen the stroke is completed the operator reverses the movement of the lever and taires a fresh grip during which operation the pavvl 19 rides over the inclined. surfaces of the teeth, being forced there-behind through the niedium of a coil spring 22 having one end bearing against a shoulder 23 of a plug 2a screwed through kone or the side Walls of the operating lever and its opposite end eX- erting pressure against an arm :25 of the pavvl 19 having a concaved recess 26 in Which the semispherical surface of a headpiece 2T attached to the spring operates, movement of the pavvl being limited by shoulders 28, Q9 at the end of the operating lever, as best shown in Fig. 2.

lt is to be understood that my invention contemplates setting the brake through a number of partial revolutions of the brakeshaft7 that is to say, one strolre of the operating lever vvill rotate the shaft, say, onequarter of a revolution7 the lever then being reversed for another stroke, the operation being repeated until the brakes are fnll'vr set,

riscopre each partial revolution of the shaft being held against retrograde movement by the pavvl and ratchet mechanism on the door of the platform and to which reference `has hereinbefore been made.

lt sometimes happens that ivhen the brakes are set and the retaining paivl and ratchet previously referred to is released, the shaft refuses to unwind because of irregularity. ln such cases it becomes necessar)7 to use force to free the brake chain and allow the shaft to perform its proper function, To provide for such emergencls7 and adapt the mechanism of my present invention to the performance of such reverse action l provide a pin 8O adapted to be inserted through a perforation 31 in the extension 13 of the sleeve 8 and through a corresponding perforation, not shown, in. the top Wall of the operating lever dovvn through a similar perforation 32 in the bottom Wall of said lever iinmediateljT behind the pavvl 19 so as to loch the same in engagement `with its co-acting ratchet tooth and thus provide a means whereby the shaft mayY be operated in a reverse direction. support 33 is provided for the pin when out of servicea and a chain 3e secures it against removal from the brake mechanism,

The operating lever is provided vvith a lateral chamber 35, so located as to be Within the space formed between the lateral entensions 11, 12 Whatever may be the position of the said lever. lllithin this chamber there located a spiral spring 36 having one end hearing against the bottom of the chamber and its other end being provided with a rounded head-piece 37 having a shoulder 38 to receive the adjoining end of the spring which, when the operating lever is in operative position presses the headpiece 37 outward into a corresponding detent 39 formed in the inner surface of the extension 11 of the sleeve 8, the purpose of this feature of the invention being to restrain the operating lever from drop ping of its own Weight While in operative position, thus relieving the operator from the necessitjyr of holding the said lever up against its inclination to drop to its normal position during the brake setting operation7 it being understood that a slight pressure on the lever ivill release the spring pressed head-piece and leave the lever free to drop by gravity to its normal position. This particular feature of niv invention is not neces saril7 conned to the brake operating mechanism herein described but is applicable also to other types in Which drop handle or operating levers are employed.

To operate the foregoing described Winding mechanism the operator raises the operating lever from its normal or inoperative position to its operative or horizontal position, in doing which the spring actuated pawl being mounted in the said lever will automaticall f swine' into osition behindV one of the ratchet teeth and establish operative connection with the brake-shaft which can then be rotated by turning the operating lever, the said operative connection being broken by the dropping of the operating lever, winch 1n swinging to its normal or l. In car brake mechanism, the combination of a shaft adapted to be rotated, a

ratchet carried by the shaft andfrotatable therewith, the member mounted upon the shaft and rotatable thereon independently thereof, an operating lever in pivotal connection with said member, and a vertically disposed spring actuated member pivotally mounted upon said operating lever adapted to engage said ratchet whereby the shaft may be rotated. A

In car brake mechanism, the combina! tion 4of a shaft adapted to be rotated, a ratchet carried by the shaft and .rotatable therewith, a member mounted Vupon the shaft and rotatablev thereon independently` thereof, an operating lever in pivotal connection with said member, and-a vertically disposed spring actuated pawl pivotally mounted upon said operating lever adapted to automatically engagel said ratchet whereby the shaft may be rotated.

3. In car bra-he mechanism, the combination of a shaft, a ratchet carried by and rotatable with the shaft, a member mounted upon the shaft and rotatable independently thereof, an operating lever in pivotal connection with said member, and. a 'vertically disposed spring actuated pawl pivotally mounted upon said operating lever adapted to engage the teeth of said ratchet whereby said lever when turned in,0ne direction kwill rotate the shaft and when turned in the opposite direction will move independently of the shaft.

l. In car brake mechanism, the combination of a shaft, a ratchet carried by androtatable with the shaft, a member mounted upon the shaft and rotatable independently thereof, an operating lever in pivotal connection with said member, and a second member comprising a vertically disposed pawl pivotally mounted upon ksaid operating lever and adapted to swing in and out of engagement with the teeth of said ratchet with the raising and lowering of said operating lever; whereby when said lever is turned in one direction the shaft will be rotated and when turned in the opposite direction said lever and said second member will move independently of the shaft.

5. In carbrake mechanism, the combination of a shaft having a ratchet therearound, of a member mounted upon said shaft and rotatable thereon independently thereof, an operating lever pivotally mounted upon said member, and mechanism comprising a vertically disposed spring actua-ted pawl pivotally mount-ed upon said lever and adapted to automatically establish operative connection between said lever and said shaft whereby the same may be rotated.

(l. In car brake mechanism, the combination of a shaft and a ratchet adapted to be rotated, a member mounted upon the shaft and rotatable independently thereof, an operating lever in pivotal connection with said member and having an elevated operative position and a depending normal position, and vertically pivoted pawl mechanism mounted on saidy lever arranged to engage said'ratchet when the'lever is elevated and thereby establish operative connection with the shaft to rotate the same g the said connection being broken by the downwa rd movement of the lever.

T. In car brake mechanism, the. combination of a shaft, a circular member having ratchet teeth formed in its peripheral surface carried by and rotatable with said shaft, a second member carried by and rotatable independently of the shaft, an operating lever in pivotal connection with said second mehr ber being normally suspended upon its pivot and adapted to be swung to a horizontal position, and a vertically arranged spring actuated ratchet engaging member pivotally mounted upon said operating lever whereby in raising the same to a horizontal position operative connection between the shaft and said lever will be established, said connection being broken by the downward move'- ment of the lever.

8. In car brake mechanism, the combination of a shaft havinga ratchet adapted toL be rotated, a member mounted upon said shaft and adapted'to be rotated independentlythereof, an operating lever in pivotal connection with said member and normally suspended upon its pivot, a. chamber formed in one end of said operating lever, and a vertically disposed spring actuated ratchet engaging member pivotally .mounted upon said lever. within said chamber; whereby when `said lever' is raised to a horizontal position said ratchet engaging member will automatically engage said ratchet and thereby establish operative connection between said shaft and said lever.

9. In car brake mechanism, the combination of a shaft having a ratchet adapted to be rotated, a member mounted upon said shaft and adapted to be rotated independent-ly thereof, an operating lever in pivotal connection With said membe and normally suspended upon its pivot, a chamber termed in one end of said operating lever, a vertically disposed ratchet engaging member pivotally mounted upon said lever Within. said chamber, and yieldable means tor forcing said ratchet engaging member into operative engagement with said ratchet.

l0. ln car brake mechanism, the combina tion ot a rotatable shaft and ratchet, a sleeve loosely mounted upon the ,shaft and having` members extending laterally therefrom an operating lever pivotally mounted upon said lateral members and normally suspended upon its pivot, and vertically disposed spring actuated mechanism pivotally mounted upon said operating lever adapted to engage said i ratchet and there y establish operative connection With the shalt whereby the same may be rotated.

il. ln car brake mechanism, the combination with a shaft provided vvith means for its rotation, a member mounted upon and rotatable independently ot the shaft, an operating lever in pivotal coimection with said member and normally suspended upon its pivot, vertically disposed spring actuated mechanism pivotally mounted upon said lever and adapted to svving into and out oi engagement with said means and thereby establish operative connection whereby said shaft may be rotated, and a device tor loclting said mechanism in operative connection With the shatt whereby the latter may be rotated in either direction.

i2. ln car brake mechanism, the combinaA tion with shaft provided with means for its rotatioin of a member mounted upon and rotatable independently ci the shalt; said member having lateral extensions forming a support for an operating lever, an operating lever pivotally mounted upon said extensions and normally suspended upon its pivot7 vertically disposed spring actuated mechanism pivoted on said lever and adapted to swing into and out of engagement with said means and thereby establish operative connection whereby said shaft may be rotated, and a. removable pin adapted to loch said mechanism in operative engagement With the shalt vvhereby the latter may be rotated in either direction.

13, ln car brake mechanism, the combination ot a shaft provided with means tor its rotation, member mounted upon and rotable independentlyT ot the shaft; said member having lateral extensions forming a supf incense port for an `operating lever, an operating lever pivotally mounted upon said extensions and normally suspended upon its pivot7 and means whereby the operating vlever is restrained t'romdropping ot'. its ovvn Weight When the lever is in operative position.

il. ln car brake mechanism, the combination of a shaft provided with means for its v rotation7 a member mounted upon and rotatable independently of the shaft.; said member having lateral extensions 'Forming a support for an operating .leven lever pivotally mounted upon d extensions and normally suspended upon its pivot. and spring actuated mechanism intermediate said extensions and said lever to restrain the le ver 'from dropping ot its own Weight vvhen in operative position.

l5. A new article ot miuiutacture comu prising a chambered operating lever adapted to be pivotallj,7 connected with a brake-shaft having a ratchet thereon and to be swung in a vertical plane uponits pivot, a vertically disposed ratchet engaging member pivotally mounted in the chamber and having a. branch arm extending therefrom, and spring mech- :mism adapted to exert pressure against said branch arm to :torce said member into operative engagement with said ratchet.

i6. A neuf article of manufacture compris-- ing a chambered operating lever adapted to rotate a brake-shaft having a ratchet thereon? a ratchet engaging member mounted in the chamber having a branch arm extending therefrom, spring mechanism adapted 'to e);n ert pressure against said branch arm to torce said member into operative engagement with said ratchet, and a spring device mounted in one ot the vvalls of said operating lever adapted to retain said operating lever in an elevated position.

i7. new article of manutacture comprising a chambered operating lever adapted to rotate a brake-shaft having a ratchet thereon, a ratchet engaging member mounted in. the chamber having a branch arm extending therefrom, spring mechanism adapted to exert pressure against said branch arm to force said member into operative enga gement with said ratchet, means tor locking said meinber in operative engagement With said ratchet? and a spring device mounted in one or the Walls ot said operating lever adapted to retain said lever in an elevated position.

JGHN lIlRBY, flu.

"Witnesses W. Emmons, Jr., H. D. Banouma.

oil this patent may be obtained for ve cents each, or aich'essng the @oiamlssoaer ot retentir Washington, E?. HG.

an operating y lll),

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