US1112839A - Pawl and ratchet for dumping-boxes. - Google Patents

Description

H. F. ROTH. FAWL AND RATGHBT PoR DUMPING BOXES.

APPLICATION FILED APR. 8. 1913.

Patentea oon 6, 14914.

raam agata Baan 1 A, Application lcd Apri'i,

Zh @F5 whom may Cmara A j@ known wat fiamma F Rom, a

-x Y w io be appiiwf to the 'iai (kampf-d nsm'cs E211! Figm'a is a SiC-Lc vicw i2 is an enlarged a; mechanism, and, nc -3 oi' Fig. lmontof 'ibo invention a bon: fla-food composed ci? sida ange@ in spaced Said placa has .ia fcon.. lol como? catci ai; 2- m" ,M ,a i* and a cxoss com maciza the cocoa matas at *ma ocvciod por to bhc check;

The hopper ifo@ 4is scia c am compowo Mvc platos f 'imaged man am. Fammi-ad oca a, :fiala Serial-N0. 759,634.

and the cross plato 3 smvcs as a fool; boald for thc dxlvcl: occupying thc seat.

ssts of four sections, the said Sections c tending the full: engh of the llopper top reclamado, and lle said sections are ar fringed in. approxim-atcly the same. planc to cios@ the 'foil width 015 the bottom of the bod or bora. The said bovtcm mmpcsc o jmmr scctonfs or oavcs lll and 11., and mbox saut-ions olcaves and 1.2, An anglo plate com 'Mag of two ntegra] p0rions 13 and 123 amangcd a?, a right angle with respect to cach ozhcr is arranged ongif ihmcof, tho said plate boing Y thc. apcx thcl'col upward, to deflect, tho macva in the box to cach sido of ha said plato lf? nu. Tho nucrn'lost Sections i1. and i1?- of' mais to thc ends o tho hopper.' op l'cccp aaclc, thc 'cazand being iudcatcd ai; 14 by' mcnns of bix/lacs' 15 o1' h@ lkc, thc Sai bix-lacs lacing' arranged at the, adjacent cdgjgos of the said sections. l strap 'IG is arranged tra'nsvcl'scy of cach cm1 of @fach of tho outer Sections, the Said straps boing; scclu'cd. to 'the said sections bh' .means of lcolta4 1"! or 'flo kc, and cach of 'thc Said straps cxtcms bent at right angles thereto, s indcatcd at 18, to form onc loaf of a hinge, "che @thacavcs bcmg :Formed by thc Straps 8 ho''mic of cach strap 1G offset outwardly ir adjacent chock plate, as shown in. Fifa 3., and is provided with au eye., as shmvn, a5; 19 in, Fig. L The lower cad of' cath of 'nbc traps 8 in provide-.f1 with a )Ho-:7k 90 ai# shown in Figs. 1 and 3, 'fnc Said. hook ou' ,ing the c vo of tho adjacelxisrap XG, izo 'h -hc adjacozl; section to the check picto.

Each of the cavcs or scctionsa lil; and. li of zhc bottom has secured to the upper face thcrcolf at the outer edge a plate 2l cfu'lc ,al

tha sccon or Leaf, as shown in Fig. 3, Lc overlap the inn'el and o' the adjacent; outer section, to cover and dos@ tha snacef bctwacn the inner section and t'hc outer sccou.

Mm onto? facas alla awpacuzw cla 1LT patcs The bott-om of thc receptacc propel conf' the botaolxl arc hinged at thciq bevond the outer cdffc of the section and irs.

or the like, tho said plato extending bcyom` A. shaft is jomnaad tnmsmiasaly ai hc roccpacc at approzmnatcly Mm cantor mentioned. The frcc end of the poron 13 om thc,

Vzo

and secured thereto by bolts 26 or the like,

andA each of the bottom ,sections 114-115*- 12--12* is provided with? an eye 27, and a chain 28 has one of its ends connected with each eye, the other end winding upon the shaft 23, as shown in Fig. 2, and the chains .are'ofsuflicient length to permit the sections or leaves of the bottom toA take the dotted linefposition of Fig. 3.'

An angle plate 29 is arranged above the 'shaft 23, the said angle plate being arranged with-its. apex above the axisl of the shaft, to deflect the'material within the receptacle away fromthe shaft, and. said plate is secured to the cheek plates 1 and 1a in any suitable manner. A ratchet wheel 30 is secured to one end of the shaft outside of the receptacle, and a pawl arm 31 is journaled on the shaft outside the ratchet) wheel, the said pawl arm being held in place on the 'shaft by a cotter pin 32. l

A link 33 has one of its ends 'connected with the upper end of the pawl arm by means of a bolt 34, and the opposite end of the link is pivoted to a lever 35, interme- "fiiate the ends thereof, as shown in Fig. 1. 'Ihe'lower end of the lever is pivoted to the ycheek plate 1a as indicated at 36, and a guard iron 37 is secured to the cheek plate between the connection of the link and the pivotal connection 36, to guide the lever and to limit the swinging motion thereof.

A par/1 38 has one ofits ends pivoted on the bolt 34, before mentioned, and the free end thereof engages the teeth of the ratchet 'wheel 30, to' move the said ratchet Wheel when the pawl arm is operated in a manner to be presently described. A rock lever 39 is pivotcd to the bearing plate 25 4before mentioned intermediate the ends of the lever, by means of a threaded stem 40 eX- tending laterally from the bearing plate, and one end of the said rocklcver is provided with a weight 41, the other end having a plurality ot teeth 42 for engaging .the l''.eeth of the ratchet Wheel.

An arm 43 is rigidly connected with the rock lever, one end of the arm being pivoted on the stem 40 before mentioned, and the said arm is connected to the rock lever by a bolt or rivet 44. The free. end of the arm is provided with a longitudinal series of openings 45, and a bolt 46 connects one end of a link 47 with one of the openings of the series.- A lever 48 is pivoted intermediate its ends as indicated at 49 toa bracket 50, secured to the receptacle, and the free end of the said lever extends to a point near the seat 10, and near the lever 35. The rear end of the said lever 48 is provided with 11a longitudinal series of openings 5l, andabolt 52-is provided for connectingthe upperend of the link 47 to one of the said openings.

lt will be evident from the description that when the front end of the lever is rocked most downwardly, the free end of the arm 43 will be moved upwardly, thus swinging th-rock .lever 39 to cause the teeth 42 to engage -with the teeth of the ratchet wheel 30, and that end of the rock lever adjacent to the teeth ing the free end of the pawl 38 to hold the said pawl out of engagement with the-teeth of the ratchet wheel, as indicated in Fig. 2, when the said `pawl 38 is in the position l'l0 42 is provided with a recess 53 for engag- I shown in said figure. A sto or hook 54 is provided on theyreceptacle, or holdin the free end of the lever 48 in lowered position,

are arranged on the right sideof the rev,

ceptacle for convenience in. manipulation, and in such position that the driver may grasp the lever conveniently. V When the upper` end of the lever is moved away from the driver, the pawlarm 31 is swung for-- wardly, andthe free end ofthe pawl 38 is movedout of the recess 53 of the rock lever, and the tooth 55 of the said paWl engages the teeth of the ratchet wheel thus moving the said wheel forwardly, an partially rotating the shaft 23 in a directlon to wind up the chains 28 to close the leaves or sections of the bottom. This movement of the lever'35 is continued, until the said leaves or sections occup the full line position of Fig. 2, and the sald leaves are held in closed position, until it is desired to dum the load,

by means of the teeth '42 of the roc lever 39, as shown in Fig. 1. The stop 54v holds the lever 48 with the teeth 42 of the `rock lever firmly engaged with the teeth of the ratchet' Wheel, so that the said ratchet wheel cannot move in a reverse direction.

The plates 21 cover the `joints between the innermost and the outermost leaves, and

there is no' joint between the cheek plates l and the outermost leaves, since the said leaves close tightly against the'under edges of the said cheek plates.

The shaft 23 is enlarged at` the'point where the chains 28 'wind thereon, as indicated at 56 to cause the chains 28 connected with the innermost leaves or sections towind 4at a greater speed than the chains connected with the outermost leaves, thus causin the vsaid innermost leaves toy close ahead o the outermost leaves, and to cause the outermost leaves to fit the plates 21 of the innerleaves. n

rlhe link 33 is threaded at its rear end, as indicated at 57, and the said end is threaded into the'body of a yoke 58, the armsof the yoke receiving between them both the pawl iso [desired to dump the load, the lever 35 is swung rearwardly until the awl 38 rests in the recess 53 of the rock ever, and the lever 48 is released from the hook and moved upwardly.4 The rock lever is thus swung to release the teeth 42 thereof from the teeth of the ratchet wheel, andat the same time the said rock lever holds the pawl 38 out of engaging position, the said pawl resting in the recess 53, as shown in Fig. 3. The

weight of the load now causes the lea es or sections to open, the shaft rotating reely to permit .the chains to unwind.

Thel chains 28 connected with the `outer leaves or sections 12 and 12a are two inches longer than the chains connected with the leaves 11 and 11a. For this'v reason the center leaves or sections will close ahead 0f the -outer leaves or sections. The shaft 23 is enlarged by a lug or plate fatthe points where the chains for the outer leaves orQsections wind thereon. The said enlargement is four inches in length and is on thej-o po-` site side ofthe shaft from the point W ere the chains are fastened. Therefore in winding after the inner leaves or sections have been moved to a point where the plates 21 areon the upper sides of the outer leaves or sections, the excess length inthe outer chains will betaken up in winding over the enlargements to cause the leaves or sections to close properly.

It will be noted that that-wall of the recess 53'adjacent to the ratchet Wheel is inclined to form a cam surface, and that the -lower end of the pawl is rounded for coperating with the cam surface to move the pawl out of engagement with the ratchet wheel when the pawl is moved toward the upper end of the rock lever beyond av predetermined distance. l

1. A paWl and ratchet "mechanism, comprising a shaft, a ratchet wheel secured to the shaft, a rock lever journaled intermediate its ends below the shaft andl having teeth at its'upper end for engaging the ratchet wheel to hold the same from reverse movef ment,said lever 1being balanced to normall stand in engagement with the ratchet whee means for swinging the vsaid lever into or out of engagement with the wheel, a pawl arm journaled on the shaft, means for swinging the said pawl arm toward and from the lever, the arm normallyextending upwardly from the shaft, a pawl pivoted at one end to the' outer end of the arm and extending toward the upper end of the rock lever, said lever, having a recess at its upper end for receiving the free end of the pawl, the wall of the recess adjacent to the ratchet wheel being inclined and forming a cam surface for engagement by the rounded free end of thepawl to move the pawl out of engagement with the ratchet wheel when the pawl is moved toward the upper end of a lever beyond a 'predetermined distance. f

4 2. A pawl and ratchet mechanism, comprising a shaft, a ratchet wheel secured to the shaft,` a rock levervjou'rnaled intermediate its ends below the shaft and having teeth at its u er end for engaging the ratchet wheel tol'i ment, saidlever being balanced to normally stand in engagement with the ratchet wheel, means for swinging the said lever into or out of engagement with the wheel, a pawl arm journaled on the shaft, means for swlngmg the said'pawl arm toward and from the lelver, the arm normally extending upwardly from the shaft, a awl pivoted at one end to the outer endo? the varm' and extending toward the upper end of the rock lever, the free end of the pawl and the upper end of the lever having engaging means for moving the pawl outof engagement with the ratchet Wheel when the said pawl is moved toward the upper end of the lever beyond a` predetermined distance.

HOMER F. ROTH.

Witnesses:

JOHN A. HEBBERN, H. P. RAUscH.

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