US948843A - Lifting-jack. - Google Patents

Description

G. R. BOOTH LIFTING JACK. APPLICATION IILED JA E.29. 1909.

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INVENTOR Glen 3.300272 ATTORHE Y8 WITNESSES G. R. BOOTH.

LIPTING JACK. APPLICATION FILED JAKZB, 1909.

Patented Feb. 8, 1910.

2 SHEETS-SHEET 2.

WITNESSES a of Illinois. have invented a new and In]- the parts at) proportioned and disposed that GLEN RUSSELL BOOTH,

E GHANA, ILLINOIS.

LIFTING-JACK.

Specification of Letters Yaient.

Patented Feb. 8, 1910.

Application filed January 29, 1909. Serial No. 475,036.

T 0 all 'wlwzait may concern:

Be it known tha I, GLEN llussau. Boo'ru, a citizen of the United States, and a resident of Ghana, in the county of Ogle and State proved Lifting-Jack, of which the following is a iull. elem. and exact t-lesm-iption.

My invention relate to lifting jacks, and

has for its object to provide one with all it. is coiiipaet, strong while of light construction, easy to operate and the parts of which, when at rest, will rattle very little, if at all.

Another objeet to provide a lit'tin' jack which may be operated h a lever to lower the load slowly its well a: to lift it, the direction of movement of the load being eontrolled by a reverse lever.

Another objet-t. is. to provide a lifting jack, which when lowering a load, and the intant the load removed from the jaa-lz, the lift-bar will automatically #lide downward, within the standards, in normal po-ition thus saving time that would otherwi-e he spent in working the liit-har down to its normal position hy the lever.

Still another ohjeet to provide means which will antoniatieallv disengage the. lever frontthe lifting bar, at the ttltnf; time the lever is lifted high enough to engage the tail piece of the pawl allowing the liftin; hair to fall suddenly. i

Still other ohjeets of my invention will appear in the ft'illowing complete deserip-= tion.

In this speeilivation l will dew-rib.- the preferred form of my invention, but it will he nndor tood that. I do not limit. m n-ll thereto a l consider myself entitled to all form. and etnhodinnmh of the in ention which ntnv he held to fall within the Ht pe of thehppended (:laitmz- Reference is indie had to the art-unspent ing drawings forming: a part u! this peci-, fir'etion. i't' whit'h similarrharavter of ref? e rorrespmnlin z 1-i:trt. 'in lt-llthe figur s, in whit-hw Figure 1 in a aide elevation of The iav'en tion with one side of the standard removetlj and parts heing in 1-((li()tii Fig. 2 a see-y tional View on the line 22 of Fig. 1; Fig. 3 is :1 Sectional View on the line 3-3 of Fig. 1;,a11d Figs. 4 and 5 are fragmentary views showing the operation of the znn on the operating lever relatively to the lever which tronnnrmds the means for controlling the pawl.

13y referring to he drawings, it. will be seen tha the standard is COltipoied of two members it], which are disposed side by aide, with inner lugs 11 which "meet, there being hults l2 disponed through the hi 11 to hold the nnanhers ll) of the standard together. The hotasn of the members his flanges 13, which forin a firm foundation for the Standard and ribs M whieh spaced apart eonnu-t the nietnltere 10 with the flange; 13 to nil'ortl additional strength. The front of the members 10 have inwardly disposed 33 within which is (llflQOSQtl an inner tiang it end. 16 on'the lifting ba 1?. On this inner flanged end there are rach teeth 18 QX'trtltllllg from near the top of the lif ing 17 to it; hottmn. That portion of the lift ng her 17 disp r'ed between the flange: i5, tapers from its top to its bottom and the spare l)('l\\'t "lt the flange: is"; is wider at their top than attheir hottem so that when the lilting bar 17 is lowered it will fit: snugly the Hang to prevent any posFihle rattling. 'lhero i: alf o went-ed to the hottotn lugs li a spring it) which dispowd in the path of the l'ttt'h' tooth i on the lilting: but ll. :0 that when the lifting inn 1? is lower-rd. it will htpndn-d yieldingly for wartlly h) the (llllitlt'l of the rat-l: tt-tth l with the spring 1;). ()n the forward side of the lifting bar 1? there are rat-l; tt h :20 whieh are engaged hy a load supporting hlocl; 21, the load MXPIJUE'lllt" hintii 1 ha\' I ing arm: L. with inwardly ttiep rt-d llanges i l tla-roon, the inwardl (llfilltfitti flanges ii hein (lik'pun-tl beyond lateral flanges 2% disposed huyond the rat-k teeth 20. There are opening 3.: in the flanges 21 through which the flanges 12?) may pa s to permit of the removal of the load supporting: blot-l; 531. Near the bottom of lite lilting bar 17 thenare laterallttlispt od rluprl it which limit ihe downward.n open ent of the load sup iifiorting hlotrl; i In each (if-theint-mleie it) of the standard there are rt-itrwardly and upwardly extending slots 2? in which is disposed a pivot.

thepivot; 2h}, llflllt;1.5c(ttl'ttl to an operating lever 29-. .Th-a n x-rating lever 29 has gear teeth ill.) at its inner terminal. these gear teeth 30 being preferably three in number so that at all times two of the teeth may en- 4 with the arm ht ot' the lever H. there being lever 29 is moved downwardly a short dis- 105 a nut Itt; on the rod 2H to press the spriug li tame the teeth t) will lift the lifting bar upwardly in the sau-e way that the nut l't' sullieieutlv to permit of the disengageis prmitled to pre the pring 35 dn nment of the pawl :17! with the rack teeth l8. wardly. 'l'he lifting bar ts then supported only 4-5 The springs- 11.) and KT having been adby the operating level 2! and when the op- 10 gge the rank teeth 15 on the lifting bar 17, ne side of the pivot 23 extends through the spring 35 heiug di-posed on the rod 34 above the arm 33 and hemg' held in plate by a mtt 3 and a seeoud spring It: being disposed on the rod 234 below the arm the spring 37 being held hetween the arm 22' and a union member 38. the rod ll being serewed into the union tnemhtr :18 to :ttljtbt the spring 3?, the spring 35 being adjusted by means of the nut 36. To this union member 739 there is also Screwed a rod I'M. the rod 39 being adjustahle with ret'erenee to the union member 35 by serewing it in the said union member 38. To this rod 11'. is pivoted an arm 40 of a lever 41, the lever 41 also having a rearwardly extending arm '2 with whit-h the reversing lever i3 is adapted to engage. A leaf spring it i provided. the leaf spring having its free terminai engaging the arm of the tever 4t and heing held in plane by a tag 45. The pawl 3;! ltas a tail pieee to. There is a lug ti' on the operating lever 21 the lug 4i being adapted to engag the tail pieee 4 of the pawl 3;. ll will be untlerstood that in the operation of my lit'titrg. jack it. is iunnaterial how it is disposed. inasmneh a the pawl is held relatively to the teeth on the lift ng har t? by the springs 23.: and 37 and not by gravity.

In the eonstruetion hown in Figs. 4 and 5 of the drawings the rod Z34 is extended below the spring 3T and is eonneeted direetly jnsted the lifting jaek is upended as follows: The reversing lever 42 the position of 'ltlt'll indieates the direetiun in which the lifting hair will move when the operating lever 29 is reeiproeated. is nnuetl upwardly:

it engages t.!e artn l. of the lever ll tort-mg it. upwardly the arm to heing moved tlnwte \Htl'tily at the ame time removing it from 3 tin path of the ram Ill whit-h moves downwardly on the reeiproeation of the operating 3 i by the above operation of the jaek. and the lever E'U. .\t the same time the arm 40 drandonnnardly the r d t! and eau es the spring 223 t2 he eotnpressed between th nut and the arm 12 on the pawl This tthe teeth thereon will euga e the rack teeth 18 when the operating? slot in me member ttt and beyond the memher 10 there is frtt'tttt'tl to the pivot '28 a ram Above the slots 1T there is pivoted a pawl I the pawl 23; having an arm 33 secured thereto. there eing an or fliee in this 1 arm 3?, in whieh is llisptistlt'l a rod 34. a

1 ever 29 is moved downwardly. thereby lifting the lifting bar 1'? upwardly, the pawl 32 slipping over the teeth 18 to be disposed in a new 70 position relatively to the lifting bar 17 to upport it and when the operating lever is titted upwardly its pivot .35 travels in the alots 27 therehy disengaging the teeth 30 from the rat-k teeth 18 in the lifting bar 17 and permitting the operating lever 29 to he lifted relatively to the other parts withoutdisturhing the position of the lifting bar 17 relatively to the tuemhers it) of the standard. As the reeiprmation of the. operating lever 29 is eoutinned. it will continue to lift. the lifting bar 17 relatively to the member to of the standard, the lifting liar being supported by the pawl at every upward mort-meut of the operating lever :39 and there;

teeth It) of the operating lever becoming disengaged from the melt teeth 18 by the travel of the pivot .26 on the operating lever 22) in the lUlS 27. When desired to slowly lower the lifting har t7 the reversing lever 43 is moved downwardty, thereby indieating the direetion of trav l of the lifting bar. When the rev rsing iever i is thus disposed th spring 4t lltt llt the arm of the lever it upwardly whit-h moves upwardly the rod 39, therebv teleas-ing the tension of the spring 3?: ant eotupressiug the spring 3? whieh tends .o l'oree the arm 33 upwardly, but as there is a load on the lifting har 1't',- one of the rack teeth 18 holds the pawl 32 in engagement with it and prevents the arm 33 from moving upwardly to free the pawl it! from the rael: teeth 1 Then the parts are thus disposed and the operating erating lever 2'. is moved upvmrdlv ti eani :3! will press downwardly the arm 4. they: by freeing the spring 37 of tension and romptessing the spring 35 \\ltltlt will move yieldiugly downward the arm thereby moving th pawl 1; into engagement again with the teeth Eh of the lifting bar 17. In this \\'a the lifting bar 17 is permitted to descend a short distant-e on eaeh eyele of the o erating lever 25 When low ring a load moment the load or weight is removed from the lift-bar. the operating le\er '25 is moved upwardly. the leaf spring it forces uptittt. t'.\ the arm It? to be held 'ietdingl v wardly the arm i of the lever it which dmvnnardh. taming the pawl 13; at the presses upwardly the rod t) and eauses the sam time into yielding engagem nt with spring 37 to he eon pressetl and thereby rethe raek tee h ta ou th lil'tiughar lT. With lea es the pawl :32 from engagement with the arm I and the pawl 3;! in tlli position, the rat-k teeth t3 on the lift-liar It; at the j when the opt-ratin leu-t- -39 is rt-t-iprtx-ated same time the eam 31 on the operating lever p y i t a FevcrLatlapted for moving the lifting hairelatively to the qtandarcl, a cam on the i o Jeratin lover T-iit'zCll is acla and for engzw- C D lit oar 17 to descend instantly in normal ion within the standard. red to permit the lilting bar 17 to (lo- N iili quickly. tho operating lever 29 is 5 mogul ngi-wartlly until the Ing d? comes into 'nnnt with thttail piore -10 of the pain of. which 1)H; Ili( ihu tail piece 46 in- Wm it i ing the said lever when the cpwaiing lever is reciprocatetl, and means for iLlUYl'Illg the lever out of position for enga eawnt with t the means an t; o ieratin lQYLI. I:

Plililll with the l';l\'l\' i -vth 18 of the ha! l7. and a; hy tho upward movehlfflit oi Ehroprrating' ,m'vr "2 its pivot '38 f irzu'ela upwardly in tin" slots 27. the teeth 4. In a lifting 5116K: a standard, a lifting bar havzng rack teeth slidahly nionniwl 0n the standard. a pawl adapted for en the rack tcclh an tl'lll secured to the awl 7 there being an orifice 1n the arm, a rotl hr+ posed in the ornice, springs on the rod 7 adapted for pressing agaimt the arm from more and below, a ever, one arm 0i which EQL'UlC'tl to the rod, an opsrating lever- 211 are Nlilhi'O'l from t-ngagt-nwnt with tln= Z atlaptml for moving the lifting har rain- 1 'tively to the standaru means on ill apex-an the means on the operating lever.

Having thus ll-scribed my invention, I

' the standard, a pawl adapted for engaging v the rack teeth, an arm secured to The pawl; Y yielding means adapted for holding the arm I t-laim as new and tlesirv to stru tl'c l) Lt-ttt-rs Patent:

2. In a lilting junk, a Elilllililltl. a lifting lmr having rack tt-t-tli slitlalily liH'illtlLtl on ti-t-ih for moving ilw lilting har rolalivcly to ilaianz nl. a rain on the opvratlng inn-r.

tuning. anti nn-anfor throwing the low-r pmition for angagmiwnt with llivf a lifting jack, a zlttl'ifilttl l, a lifting:

liar having rac tt reth slitlahly mounted on the lttfi liii'tl. a pawl mounted on the stainlltl'ii zllziptcil for vngaging the Rich t vll; an

arm wwurml to tlw pawl. yii'hling nnatm: atlaph-tl for hohling (in; arm in a plnralit of prwh-tvrminctl po itions, a low-r. one arm of which ii-z-in'ml to the yielding HHHUD'. an optln liYt'l' mlaptvtl for mo ing 2. lifting ml' l'vlzitivfili' to flu iillllfll'ti. at mm:

5. In a lifting Hark. a \tain'larth a 'lifiin I bar having rack teeth slidahly moltltlwl on pirot. lll PO lQtl in slot; in the tantlareladapted for moving the lifting liar ltl:l-

lively to the standard. a rain on the opcratf in; lever wh t-h is adapted for 011;;

mum on the opvrating lvvcr.

(i. in a lifting jack, a :tanrlard. a lifting lmr having;- rack lit'lll slitlahly mounted on inn; tin Hill lever when tin operating lcYtcl is 1'ct:ip-' i rot-Mull. and means for thrmxin the hart-n out of position for cngagvna-nt with tho tho tantlartl, a pawl :nlnptml for vngaging' 1hr rar-h lvt-th. IlK-IHZS ior moving the pawl rt-lalirt-l Io ihv lilting hat. mean holtling' an opvrating lm'ur havingn pivot tlispostetl in slot.- in the standard adapted for inov- :ulaptwl for t-ngngihg tlnwrontl nn-iitiunsilh-wr.

\Iliii'll i w nt-ml to the roll, an oprrnlin If 7 :r l

i i l f i 5 i ing the said level, a spring adapted for Q adapted to hold the arm ina plnrality of pre pre$ ing the said lever in the direction of the cam on the operating lever, and means for throwing the lever into a position where it eannot be engaged by the eam on the operating lever.

6. In a lilting jack, :1 standard, a lifting bar having rack teeth slitlahly mounted on the etandard, a pawl adapted for engaging the rack teeth. means for holding the pawl yieldingly in a plurality of ]'iu.' iti(;n.-a. a lever. one min of which i:- secured t the said means. an open-ding lever havitr; a pivot tlispmerl in slots in the standard Wltltlt is adapted tor engaging the lifting bar for moving it relatively to the standard, :1 mm on the operating lever \vhieh is adapted for engaging the said le\er, a -pring adapted for pressing the said lever vieldin zl v in the direetion of the eatn on the operating l(\ er.

9. in a lifting jack. a standard. a lifting har having ltlt'li teeth slidahly m unt d on the standard, a pawl adapted for engaging the !:t(l( teeth. means i'or holding the pavvl yieldingly in a plurality of predetermined positions relatively to the lifting liar. a lever, one arm of which is set-tired to the arid mean an operating lever pivoted to travel in slots. a (":1") on the operating lever which is adapted for engaging an arm of the lever. meam for holding; the arm )t'ieldingly in the direetion of the eannantl tnean for holdin; the arm in a position out of reaeh of the (21th.

10. in a lifting jarlt. a standard. a lifting liar having rat-l: teeth slidahlv mounted on the standard. a pawl adapted for engaging the Itlt'k teeth. inean for holding the pawl yieldinglj in a plnralit of predetermined f positions relatively to the lifting har. a l( vet. one arm of \\'llltlt is eenred to the aid means. an operating: lever pivoted to travel in side, a earn on the operating lever \vhieh means for holding the arm vieldingly in the direction of the eam. meana for holding the arm in a position out of reaeh f the cam, and a tail pieee on the pawl \vhiv-h i.- adapted to he engaged by the operating lever when it is raised out of engagenu-nt with the lifting bar to free the pan] from the lifting bar and permit it in (ltSttlltL determined positions, a lever, one arm o which 15 secured to the rod. atroperntmg lb\t:l' adapted for moving the lifting bar 1 relatively to the standard. means on the 7 operating lever which are adapted for enll. in a lifting jar-k. a standard. a ifting bar having rat-l; teeth slidahly mounted on v posed in the nrilit'e. springs on the rod gaging tlie said lever when the operating lever is reeiproeated, and a tail piece on the pznvl which in adapted to he engaged h v the operating lever when it is lifted upwardly out of engagement with theliftinglmrthereby freeing th pawl from the lifting har and pt-l'ittitlllrg' the lifting bar to desc nd.

1;. in a lifting jack, :1 tantlarcl, a lifting har slidahly mounted in a slot in the standard. that portion of the lifting har disposed in the slot tapering from its top to its hottozn and the tvi lth of the slot being \vitler at it top than at its bottom t inalt'e a close fit l ttwltll the lifting bar and the standard when the lifting lmr is dispwed in a predeinsition within the standard to m id ratt inn", and yielding means on the standard \\'lllt'll are adapted for presbing against the lifting bar for holding it firmly in position.

lit. in a lifting jaelt, a standard, a liftin" har slidahl mounted on the standarti means t enpport the lifting bar on the standard. there being lateral flanges on the lifting bar having openings therein. a slide on the top of the l fting bar extrudin; hend the flanges and a supporting bloeh ha vine inwardly disposed flang s beyond the llztnges on the liftitn ban, the flanges on the :npporting hloek lreing adapted to pass through the openings in the flanges on the lifting har. and li'tLttllS to hold the support in hloelv relatively to the lifting: bar.

H. in a lifting inch. a standard. a lifting har having rack teeth slidahly m unted on the standard. a pawl adapted to engage the rat-l." teeth. a ro l. prings mounted thereon, means actuated lvv the springs adapted to move the pawl. an operating lever having a pivot tllSPUNttl for traveling in sluts in the standard, \vhieh is adapted for engaging the little; har. a lever one arm of which is seeurevl to the rod. and a can: on the onerat in; l ver adapted for engaging the lever.

in l(. 'lllll(ll whereof I have ienml in name to thi spet-itiration in the prwenee 0'? tr. 0 uh erihing \vitnesee.

GLEN RUSSELL lit NH.

Wit messes RAY MCCAY, J. W. llornnsren.

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