US1304683A - hewitt - Google Patents

Description

F.- M. HEWITT.

sHovsLmG MACHINE.

APPLICATION HLED MAR` \9| |917.

v Patented May 27, 1919.

F. M. HEWITTY. SHOVELING MACHINE.

APPLICATION r11-En MAR. 19. 1917.

1,304,683. Patented May 27, 1919.

Vl. SHEETS-SHEET 2.

WNESSES NVENTH A TTOH/VEYS F. M. HEWITT.

sHovELING MACHINE.

APPLICATION FILED MAR. I9.v I9I7.

1,804,683. Patented May. 27, 1919.

Wl T/VESSES /N VEN TOR v A TRNEYS F. ML HEWIT.

SHOVELING MACHINE. APPLICATION man MAR-19, 19u.

Patented MayQ, 1919 4 SHEETS-SHEET 4.

kppliceiticn llcf. March 19,

iicw and lisciiul .linpji'cvclncnt in Slvuvcling- ,Ricchi ics. iicziifwn.

ci? wim-,li Llic fcilcwinggj; is

.i Specincrnllv ic nclnifs. anc. in thai cinicd in vencion mc itc itin.; Sliczclc in ming ci? clic .Y clic latini.' :iiziicwcys inciciizil lic Slacvclci. im munching i'nczins legumi.. "ill .kw licitar 1 .ipizicn of inl jgwcscnt im :unprc "A, in 'clic l.. .ny nn im r if .L ultimi lcnggiteicmnl Milon it? n. Snlcntiallym line 4l.- z l. 'ig

Fig. 5 is a, (l `l ci clic uppcr qwiiticn of Fig. 4. illmiti" :ing cnc of tin-i scccpc in Cllnnping' gmsiinn.

lg. (i is n similar vicw of tali@ lcwci www ltion mi Fig. 5, illust Ming cnc 0i? flic comps; approaching' 'Elie digging' pcfligicn, and

` Fig. 'i' n, vertical tmnsvcifsc section taken Substantially .cn line 7-7 ci Fig. 4:.

lcifcl'lng 110W to fvlicsc figi'u'cs, it will lic Scan that vmy iini'novcincnts. iesirlc in ythc shovcling mechanism, consistinggcncmlly icii digging; buckets; or scoops ccnncctccl to and opciamig with endless chains2 the lai- 191'". Serial O. 155,773.

tei' mounted and moving in an excavator Lmi portion cf a. incin supporting c1: mvc lng frame, the lutter slicwnpaitly at l0 in Fig. l, and. ccnziining' thc driving n'icclmf nisin.

Briciiy, this driving inccl'ninisxn which forms n@ part of my pfcscnt claims, incli'idcs diiving incior (not, silio'wi'i), ii'lic shafts ift cig, which is providccl with :i gcarccl ccnnccdicn ai; with :i slmlt 16, in turn gcc-lcd :it 17 with a. Shaft 18. 'llic shaft '18,tln'01igh @can ing` lf), di'iifcs the upwardly and yccfwziiclly inclincd flisclung'c ccnvcli'crs 20, above flic main frame, :md over thc forward @ncl cf which the: icm upper cnil ci thc' cizcfivzno funn@ cxizcnds.

{Siliziiiz il@ tc c :forfwa'iefl transverse similia 21). :it ilic cpijmsiizc cnfls ci' which :m1: sprockci whccls ccnnc b'f Spinclzct clix-m1,., 03 3c 1x2-lie cnsl im i; wheels Zl ci? flic limer* :ma 'Wai simili; @n oppcsiic sides ci! @lic fer-L- ciimcr iii'mnc, sccn in Fig'. Y. y ',lllic ci' ine inacliinc is moved, in opposite di:icciicnc in usc. Upon suitable supports. is

, clctzwlmbly associated with ific 'forapron. scifi, Side. plnlcs inning jcnrnnlc lli cwc fomnd elicit luciorc nicnncl, :is Wcli vimnppm ccm ciuffi. Q6. clic ici limfnig Sprcclcct, Wheels 253 over which thc upper portions of the excavator chains; 'i9 n end of the main frame 10, and connected there by clamps 3l providing for ready removal of the excavating frame when desired.

Each of the excavator buckets or scoops 32 is provided at the forward edge of its base with forwardly projecting excavator teeth 33, and has the rear portion 34 of its base rearwardly and upwardly inclined, theforward and rear ends et' the scoop being open as shown, and the side valls 35 having forward and rear laterally outstanding studs on which the forward and rear guide rollers 3G and 37 at opposite sides of the scoop are mounted, the studs supporting the forward rollers 36 being connected by links 38 and brackets 39, to the chains 79 as plainly seen in Fig. 2, with the several parts so disposed as that the greater weight of the scoop is forwardly of the forward rollers 36.

Thus the scoops follow the chain 79 in the movement of the latter, the relative positions 4 of the scoops being controlled by guidcways in which the rollers 36 and 37 travel.

To this end, adjacent each of the side plates 51, are formed upper, intermediate, and lower guideways 5S, 59, and G0, between intermediate track b rains G1 and G2, and upper rims G3 and lower ribs G4, the upper rim G3 having upper and lower curved poi'- tions (55 and tt respectively at the upper' and lower ends of the side plates 51, and of which the former has a lower bent portion G7 forming a channel GS adjacent the upper end of the guide rib 6l.

At its lowerend the lowei' guide rib (il has a supplemental rib 69 curved to form the lower enlarged end of the giiideway GO, as particularly seen in Fig. 4, the lower end of this rib (39 joinine' the lower curved portion G6 of the upper rim (33, in spaced relation to the lower curved guiding ends of the beams Gl and/62. The upper end of the beam 62 terminates some distance below the upper extremity ofthe beam G1, and a guide arm 70 is pivoted at one end to the said upper eX- treinity of the. beam (il, to swing from a position in engagenienty with the upper end of the beam (l2, so as to close the upper end ot the guideway 59, to a position across and closing the upper end ot the channel (3S.

switch block 71 is, furtlurmore. disposed transversely within the lower enlarged portion ot the guideway titl, so as to divide the. latter into upper and lower channels 72 and 73, the upper end of the latter of which is normally closed by a. switch arm 7l pivoted to the upper portion ot the block 7l and having an angular arm 75'normally upstanding within the. channel 72., and a controlling spring 7t. At the lower end of the switch block 7l is another switch arm 77 pi\oted to move to angular positions respectively closinw the lower ends of the channels 72 and 73.

l`hus, as each seoop'32 t '-zrvels upwardly with the upper run of the chains 79, with its forward rollers 3G in the guideway 58 and its rear rollers 37 in the guideway 59, as seen in Fig. t, the bucket will be supported.

in substantially horizontal position to pre-` vent its contents from spilling. As the bucket r `,aches the upper end of its travel7 its rear rollers 37 enga-ge the arm 70 and move the latter across the upper end of the channel 68 as the said rear rollers proceed into the Channel to the position shown in Fig. 5, so that, the scoop connecting links 3S round the upper sprockets 28, the scoop will be shifted to its vertical dumping position,` as shown in F ig. 5, so that the material carried upwardly therein will be dumped in practice upon t-he discharging conveyer 20, shown in Fig. 1.

As the movement continues from the dumping position, the scoop pivots upon its rear rollers 37 in the lower portion 67 of the rim within channel 68, the upper rollers being drawn downwardly across the upper end of the beam 61 thus forcing the arm 70 across the upper end of the guideway 59, so that, in the further movement of the scoop, both its forward-and rear rollers will be. guided into the upper end of the lower guide-way GO, as shown at the upper portier of Fig., el. Thus, after dumping the scoot proceeds down 'ardly in the lower guide way GO with the lower run of the chainsr vnl iwardly across the upper portion of the channel 7:?, so as to force the rear rollers 37 to descend into the channel 73 and pass downwardly therein below the switch blocks 7 t). as the forward rollers proceed above the said switch blocks in the eliannel72. lVhen the foi-ward rollers 36 strike the switch arm 77, the latter is forced down vardly tothe dotted line position in Fig. AIt, and the said forward rollers then pass into the lower portion` of the guideway between the lower ends ot' the beams (l1 and (l2, and the lower curved' portion (tti of the rim, while the rear rollers 37 in their passa-ge out of the lower end of the channel 73 again elevate the switch arm 77 to the position shown in full lilies in Fig. l, so as to hold the scoop during its downwardly rounding travel, in properly Ainclined excavating position. As the links 33 round the lowersproeket 2t, the lorward rollers 3G will start their up ard movement in the upperguideway 5ta, while the rear rollers 37 start their upward movementin the intermediate gnideway 59 by virtue otl the greater weight of the scoor` forwardly ot the forward rollers 36.

s seen particularlyY in Fig. 7, and also ii tFig. l. "he `upper edges ot' the guid beam: (S1 and (3Q are beveled to provide minniiuin space for the lodgment of falling particles of the material excav .ut-1. and carried by the Leccese scoops 32, these beams being supported inwardly beyond the sides 51, as seen in Fig. 7by means or' bolts 80 extending through spacing thimbles and the like 81.

It is thus obvious that my present improvements provide for' the ready detachment of the excavator frame, seated as above described upon the forward portion 3G of the main frame, by virtue or' the clamp 3l, and that the means forming the proper guideways for the scoops in their movement, are arranged to constitute a non-shifting pivot for the scoops at the upper end of their travel, by means of the rear rollers 3'? of the scoops within the channel 68, so as to obviate pushing of the scoops upon their rear rollers, as in my patent above referred to, the power of the excavating chain 79 being directed wholly to pull upon the forward rollers 36 in drawing the latter downwardly from the dumping position shown in F 5, beyond the upper extremities ot the beams til.

It is furthermore obvious that the upper switch arm 550 effectively guides the rollers of the scoops into the upper end of the lower guideway in the descending movements, by virtue of its particular disposition and action, avoiding all necessity of dependingr upon ,gravity to properly position the scoops at the beginning of such movement, as well all danger of either the forward or rear rollers entering,r the upper end of the intermediate guideway 5S). lt is to be understood, of course, that, in my patent before rcs ferred to, the lower switch arms ist and 77,

operating as above described, act in use to shift the scoops to and support the saine in properly inclined eacavatuni,n position.

l claim:

l. In a machine oit the type described,

an excavator including endless traveling chains, scoops having forward and rear roll ers and linked to said chains, adiacenl'- their forward rollers, a trame having; upper and intermediate guideways in which the gior ward and rear rollers are respectively movable in an upward 'direction toward the dumping position, and lower guideways downwardlyin which both the forward and rear 'rollers are movable, said frame having depending,r channels at the upper ends into which thc rear `rollers are movable at the dumping. position to dump the scoops without overturning the same, said channels being closed at their lower ends and approxiw mately as wide as the rollers to cooperate with the said rear rollers and form stationary pivots on which the scoops are shiftable to project their forward rollers into the lower guideways, and switch arms pivoted adjacent the upper end of the frame and movable into and out Wof operative position across and closing the upper ends of the intermediate guideways.

.in a machine of the type described, an excavator including endless traveling chains, scoops havingr forward and rear rollers and linked to said chains, adjacent their forward rollers, a frame having upper and intermediate guideways in which the 'forward and rear rollers are respectively movable in an vupward direction toward the dumping" position, and lower guideways downwardly in which both the `forward and rear rollers are movable, said frame having depending Vchannels at the upper ends into which the rear rollers are movable at the dumping position to dump the scoops without overturning the same, said channels being closed at their lower ends and approxin mately as wide as the rollers to cooperate with the said rear rollers and form stationary pivots on which the scoops are shittable to project their forward rollers into the lower guideways, and switch arms pivoted adjacent the upper end of the frame and alternately engaged and shifted by the forward and rear scoop rollers into and out of operative position acrossand closing the upper ends of the intermediate guideways.

3. ln a machine of' the type described, an excavator includingn endless traveling chains, scoopslinkcd to the chains and hav-v ing guide rollers, and means forming guide ways for said rollers, including guide members certain of which are curved to forni stationary pivots coperatingwith certain of the scoop rollers adjacent the dumping position, and on which the scoops are shiftable.

4. ln a machine ot the type described, an excavator iin-.hidingendless traveling chains, scoops linked to the chains and having guide rollers, and means forming' guideways for said rollers, including guide members, certain of which are curved adjacent the upper ends of the guideways to form channels into whicl'i certain of the scoop rollers are n'iovable, said channels being closed at one ond and approximately as wide as the rollers to coperate with said rollers in the 'formation of stationary pivots upon which the scoops are shiftable.

FRANK M. HEWITT. Witnesses Rosin: Bunn, FLORENCE BURR.

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