US851313A - Jack. - Google Patents

Description

No. 851,313. PATENTBD APR. 23, 1907. 4

J. H. PEARSON.

JACK.

APPLICATION FILED JULY 9, 1006.

2 SHEETSSHBET '1.

'llllllll PATENTED APR. 23, 1907.

J. H. PEARSON.

JACK.

APPLICATION FILED JULY 9. 1906.

2 SHEETS-SHEET 2.

ms "cams PETERS -wmmcrrm n c UNTTED STATES PATENT QFFTCE.

JAMES H. PEARSON, OF BLOOMFIELD, INDIANA, ASSIGNOR TO WILLIAM S. BOGY, OF BLOOMFIELD, INDIANA.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed July 9,1906. Serial No. 325,351.

To all wit/mt it may concern.-

Be it known that 1, JAMES H. PEARSON, a citizen of the United Stars, residing at Bloomfield, in i he county of Greene and Stale of Indiana, have illVOllLGtl certain new and useful Improvements in Jacks, of which the following is a specification.

My invention contemplates eeriain new and useful improven ems in that type of lifting jacks and wire s.re'.chers that operate upon what is known as the clutch-loop principle, .he present embodiment of my invention partaking also to some ex-.ent of the charac1eris5ics of the ratchet lype of jack, bin this is only incidenzal LO the main operative principle.

The object of my invention is to provide an improved lifting jack of this character which ill be composed of comparatively few and simple parts and which will be durable, as well as efficient in operation and in which the parts may be readily detached from each other. and as readily assembled without the necessity of any especial knowledge of machinery or without any machining of the parts. And further object of the invention is to provide a jack of this character which will be absolutely devoid of nuts and bolts that are so liable to become loose and become lost, all the parts of my improved ack being susceptible r assembling without the necessity of any fastening means other than their own inherent construction and design as they come from the factory.

ith these and other objects in view, as will more fully appear as the description proceeds, the invention consists in certain constructions, arrangements and combinations of the parts hereinafter fully described and particularly pointed out in the appended claims.

For a full understanding of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result, reference is to be had to the following description and accompanying drawings, in which:

i igure l a perspective view of my improved lifting jack; Figs. 2 and 3 are detail SCC'tiQilfll views on an enlar ed scale, illustra i 1g the parts in different ositions; Fig. 4 is a side levat-ion of the two runners and operating parts, the standard of a portion of the operating lever being broken away; i 5 is a Fig. 8 is a detail perspective view of the pitma-n detached.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the drawings, the numeral 1 designates the standard of myimprovod jack, which is provided wiih a foot 2, a serrated or toothed edge 3, and a clcvis 4 at its upper end. 5 designates the upper runner provided with a vertical opening by which it receives and encircles the standard and is mounted to slide longitudinally thereon, and 6 designates the lower runner of the jack, which is also mou11ted to slide longitudinally on the standard and also adapted t0 slightly tilt or cant thereon.

The upper runner 5 is provided in its front end with a circular opening 7 extending entireiy therethrough, said opening communieating with a side slot or gap 8 which extends from one face of the runner but terminates short of the opposite face. ithin the circular opening 7, a cam disc 9 is mounted to turn, said disk being provided with an opening 10 extending entirely therethrough, with an angularly notched side 11 and with a sub stantially crescent shape retaining member] 2 which is preferably integral therewith. One edge 13 of this retaining member 12 constitutes a flange adapted to extend over the wall of the opening 7 and said retaining member is formed with a slot 11 and a lip 15 at one end of said slot. The cam disc 9 is preferably integrally formed on one end of the operating lever 16 of the jack, and said end of the lever is also provided with a flange or enlarged edge 17 designed to coact with the flange or edge 13 to hold the cam disc 9 in place within the circular openii'ig 7. The disc 9 is inserted within its opening 7 when the upper runner 5 is detached from the standard. By providing the gap or side opening slot 8 it is evident that the operating lever 16 may be turned around until the ilange or edge 13 is opposite said slot 8, in which position the disc may be bodily entered into its opening 7. Then by turning the handle 16 and the disc 9, it is obvious that the flange 13 will engage with the boundary wall of the opening 7 on one side, while the opposite flange 17 will engage with the said wall on the other side so as to maintain the disc properly mounted within its opening. The purpose of the slot 14 and the lip 15 of the crescent shape retaining member 12 will be hereinafter described. The operating lever 16 is provided with a preferably wooden handle portion 18 which is detachable therefrom and is wedged into secure engagement with the lever by having a slightly reduced end inserted within the loops 19 secured to or integral with the operating lever, as illustrated in the drawings.

The lower runner 6 is provided with a side opening slot 20, a transverse bore or opening 21 communicating with said slot at the lower end of the latter, and a socket 22 also communicating.with the slot at one end and designed to contain a helical expansion spring 23. The lower runner 6 is also formed at the rear side of its opening by which it receives the standard 1, with a toothed surface 24 adapted to engage with the teeth 3 of the standard.

25 designates a pitman, which is provided at each end with a preferably integral wrist pin 26. The wrist pin at one end of this pitman is adapted to be j ournaled in the opening 10 in the disc 9 and is inserted in said opening through the slot 14 in the retaining member 12, when the disc 9 is turned around to bring such slot into complete coincidence with the opening 10. After said wrist pin is in place, the disc 9 is turned around sulficiently far to bring the lip 15 of the retaining member over the outer face of the pitman and in all the subsequent operative movements of the disc in the actuation of the jack, this lip will extend over the face of the pitman and thereby securely hold it in place. The wrist pin 26 at the opposite end of the pitman is seated in the bore or opening 21 of the lower runner 26 and the lower end of the pitman works in the slot 20 of the lower runner and is engaged by the expansion spring 23. It will thus be seen that the spring 23, in its action, tends to cant the lower runner 6 on the standard, as illustrated in Fig. 2, so as to cause the engagement of the toothed wall 24 with the teeth 3 of the standard, such engagement resulting in securely locking the runner to the standard as against downward displacement.

The upper runner 5 is provided at its rear 3 side with a chamber 27, the rear wall of which is inclined, as shown, towards the bears against the lower wall thereof and also against the shoulder 31 of the dog, so as to push the dog upwardly. This spring, coacting with the inclined wall of the chamber acts to force the dog 29 upwardly and inwardly toward the toothed edge 3 of the standard so that the toothed surface 30 of the dog will securely engage the teeth of the standard and prevent and hold the runner as against downward displacement. The wedge block or dog 29 is provided at its rear or lower end with a lug 33 designed toengage the heel 34 of the upper runner, and a clevis or loop 35, or similar device is secured to the end of said lug so that the operator may pull the dog downwardly and outwardly against the tension of the spring 32 and engage the lug 33 with the heel 34 of the runner so as to hold the dog in an inoperative position with its teeth and the teeth of the standard out of engagement.

A lift bar 36 is provided at its upper end with an opening by which it is received upon and suspended from a journal pin 37 projecting from one face of the upper runner 5. The lower end of this lift bar is provided with a bracket 33 designed for use when a low lift is desired or some horizontal pull upon a wire fence fabric or the like is necessary. The lower end of the lift bar 36 is also formed with a laterally extending hook finger 39 adapted to spring around the front edge of the standard to secure the lower end of the lift bar to the standard. This securing action of the finger 39 is only as against an outward pull, it being understood that the lift bar 36 is free to slide in a true longitudinal direction with respect to the standard as the runners 5 and 6 climb the same. The lift bar 36 is formed at its journal end with a serrated cam surface 40 designed to ooact vsdth a clamping surface 41 projecting from one side of the upper runner 5 for the purpose of securing wire fence fabric or the like when it is desired to stretch the same. The upper run ner 5 is formed below the clamping lug 41 with a laterally projecting ear or lug 42 adapted to bear against one edge of the lift bar 36 when the same is secured by the hook finger 39, and. it will thus be seen that the lift bar is held in a true longitudinal plane in the operation of the jack, all side lash or strain being avoided. Hence the lift bar 36 in the position just described, provides an increased bearing for the upper runner 5 and avoids any sidewise strain upon said runner, the provision of the lift bar and its arrangement with the finger 39, the pin 37 and the ear 42 accomplishing the same bearing effect as if the upper runner 5 were extended from its upper edge to the lower edge of the lift bar. In addition to its bearing function, as just described, the lift bar 36 may be sprung out of engagement with the standard 1 and turned around on the pin 37 as a pivot and hooked ISO into a chain or clevis, on the upper end ol the standard 1 for horizontal pulls as well as upward li'tts.

In the practical use of the device to stretch wire, the lift bar so is unshippcd, so to speak, from its engagement with the standard, and the wire is gripped between the lug ll and the serrated cam su face 40 by swinging the lift bar on the pin 37 as a pivot. manifest that the wire may be then stretched by bracing the foot 2 against a tence post and working the handle 18 to cause the two runners to move along the standard.

rom the toregoing description in connection with the accompanying d swings, it will be seen that my improved jack operates u pen the clutch loop principle ot alternz'uely gripping members. To actuate tllt jack upwardly to raise a load, the wedge block or dog 29 is unshipped l'rom ifs en 'zgement be tween the lug 33 and heel 3-1 so as LO give the spring 32 free play to wedge the dog upwardly in the chamber 27 and against the llOUtllOll edge 3 of the standard. By an upanddown or pump-handle motion ol the operating lever 16, it is evident that the runners will climb the standard. Assuming lhai 'he handle of the operating lever is raised into a substantially vertical position, the notched side 11 ot the disc 9 will then bea against the outer edge of the pitman 25 and force the pitnian inwardly so as to swing i he lower runner 6 to a true horizontal posi ion Willi respect to the standard, and ihis will ILSillt in bringing the smooth wall 24 of lhe lower runner against the 5111001111 edge of the standard and in throwing the toothed wall ot the runner out of engagement wiih the toorhed edge of the standard, as illustrated in Fig. 3. llence with the parts in this position, the lower runner 6 is fre i I!) slide upwardly on the standard and this upwardly sliding movement is elleeted, obviously, by the reiaiive p siiion of the disc 9 in its b aring opening 7, l'or it will be seen with reference to said Fig. :3, that the eccentric opening 10 ot the disc, in which. ihe upper wrist pin 26 of the pitman is mounted has swung a mind and upwardly to draw the pitinan and (ZOUSOQWIELlY llO lower runner, in an upward direciion. During ibis movement, the upper runner has been held stationary as against downward displacement by means ol' ihe engagement be. ween ihe teeth of the dog 25) and one edge ol the standard 1. By then lowering the handle, or operating lever, is is obvious that ihe nod-h ll of the disc 9 will be flLl'liLd out ot engagement with the pitman 2E) and ;hereby allow the spring 23 to cm he lower unner lo the position shown in big. 2 with the ioo;hed

we 1 24 and the toodied edge cl .he r-nl'l-llllili'kl 1n engagement thereby leckmg till) lower runner to the siz'r-ndard. This same movement will mamtesily move the upper runner 5 upw 'rdly the standard, as the [t is lower wrist pin 26 of the pilman will act as e. l'ulcrum tor ihc toggle-like movement ol the disc 9 and pii'man, L'he said upward movemem ol' ihe upper runner being accommodaued or permieied by lhe leeihilll ot the dog 2%) sliding upon ihe (0Lli 3 ct Lll( slandand. Hence it vill be seen ihat' by this pump he i (llc moiion ot ihe lever, lirsl one runner in cluich the standard and t,ll(ll the other runner will clulch, one runner rising while the other runner remains stationary, and each in turn supporting the other in ihe climbing action. 'lo climb down ihe siandard, ihe weight is lirst ihrown on lhe upper runner and the handle manipulated so as to lowerihe lowe: runner to iis l'ullexieni; ihe dog 29 is then pulled downwardly and iho handle manipulated so to lei the upper runner slide downwardly as tar as possible, while the weight is upon the lower runner, the dog is then treed so as to hold the upper runner slationary while lliO lower runner slides down, and so on until the limit ol" ihe lowering movement has been reached. To let boil]. runners s de quickly down lhe slandard, i1 is only nece arv to lock the dog it) in. iis inop e the operateraiive posnmn and to then in ing lover to a lull vertical posiiion which w Lil let the lower edge of ihe upp runner down upon the upper edge ot the lower runner and (his cont o between 'ihe two edges of lllt runners A result in l'orcing zhe lower runner to true liorizonial position .\i; ll rcspeci lo the standard, wiih. i;s teeth disengaged trom the ieei h ot the slander l, and obviously binh runners may then be slid quickly down the latter.

it will be seen that my improved inveniion enables the parts of my improved jack ie be so formed or made to do away eniirely with rivets, bolls, s 'rews, or similar fastening devices. The parts need no machine work to assemble them and may 1' azdily be assembled and taken apart agnin by any one ot reasonable intelligence and when assembled it is obvious ihat a strong and durable s1ructure is produced.

Having thus described the invention, what is claimed as new is:

1. A device ol thr cha 'acter described, comprising a. standard, upper and lower runners mounted upon said standaril, means tor ell'ecting a climbing action ol the runners on the standard, and a lilting bar carried by the upper "unner and having a sliding engage ment with the standard below the lower innner.

2. A device ol" the elm 'acter described, comprising a standard, upper and lower runners mounted upon sad standard, means tor ell'ecting a climbing action ol the runners on the standard, and a lilting ar carr d by the upper runner and h: ving a detachable sliding engagement with the stamlard.

3. A device ol the character descr'bed,

comprising a standard, upper and lower runners mounted upon said standard, means for effecting a climbing action of the runners upon the standard, and a lifting bar carried by one of said runners and provided at its lower end with a laterally extending hook finger adapted to spring around the edge of the standard below the lower runner.

4. A device of the character described, comprising a standard, upper and lower runners mounted upon said standard, means for effecting a climbing action of the runners on the standard, and a lifting bar carried by the upper runner and having a sliding engage- I 5 ment with the standard below the lower runner, said lifting bar being provided with a bracket, as and for the purpose specified.

5. A device of the character described, comprising a standard, upper and lower runners mounted upon said standard, means for etlecting a climbing action of the runners on the standard, and a lifting bar pivotally mounted upon the upper runner and arranged for detachable sliding engagement 2 5 with the standard, said lilting bar being provided at its pivoted end with a serrated cam surface, the upper runner being provided with a lug adapted to coact with said cam,

surface.

6. A device of the character described, comprising a standard, upper and lower runners mounted upon said standard, means for eflecting a climbing action of the runners on the standard, and a lifting bar pivotally mounted at one end upon the upper runner and adapted For sliding engagement with the standard at its other end, the upper runner being provided with a laterally projecting ear adapted to engage the lifting bar intermediate its ends, for the purpose specified.

7. A device of the character described, comprising a standard, upper and lower runners adapted to climb said standard, the upper runner being provided with a bearing opening, and a side slot opening thereinto, a disc mounted in said bearing opening and provided with an eccentric opening, a pitman journaled at one end in the opening in the disc and also journaled in the lower runner, and an operating lever operatively connected to said disc, the said disc being provided with a retaining member having a flange designed to engage the boundary wall of the bearing opening whereby to retain the disc therein.

8. A device of the character described, comprising a standard, upper and lower runners mounted to climb the standard, the upper runner being provided with a bearing opening, a disc mounted in said opening, means for turning said disc, the disc being provided with an eccentric opening, a pitman journaled in said eccentric opening and in the lower runner, and a retaining member on said disc, said retaining member being formed with a rib adapted to extend over the pitman to hold the same in place.

9. A device of the character described, comprising a standard, upper and lower runners mounted to climb the standard, the upper runner being provided with a bearing opening, a disc in said opening, means for turning said disc, a pitman journaled in the lower runner and journaled eccentrically in the disc, and a retaining member on the disc, said retaining member being formed with a slot adapted to receive the upper end of the pitman, and a rib designed to extend over the pitman to hold the same in place.

10. A device of the character described, comprising a standard, upper and lower runners mounted to slide on said standard, the lower runner being adapted to tilt on said standard into clutching. engagement therewith, a pitman operatively connecting the two runners, an operating disc mounted in the upper runner and in which the upper end of the pitman is journaled eccentrically, and means for turning said disc, the disc being provided with a notch adapted to be brought into engagement with the upper end of the pitman and arranged to throw the lower end of the pitman inwardly, whereby to swing the lower runner out of locking engagement with the standard.

11. A device of the character described, comprising a standard, upper and lower runners mounted to slide on said standard, the lower runner being arranged to tilt on said standard into clutching engagement therewith, a pitman operatively connecting the runners, a cam disc mounted in the upper runner and in which the upper end of the pitman is eccentrically journaled, the said disc being provided with a notch adapted to engage the upper end of the pitman for the purpose specified, means for turning said disc, and a spring mounted in the lower runner and bearing against saidpitman.

12. A device of the character described, comprising a standard, upper and lower runners mounted to slide on said standard, the lower runner being arranged to tilt on said standard into clutching engagement therewith and provided with a side opening slot and with a bore and a socket communicating with said slot, a pitman operatively connectmg said runners, one end of said pitman being seated in said slot of the lower runner and provided with a wrist pin journalcd in the bore of said runner, means for actuating said pitman to alternately move the two runners, and a spring in the socket of the lower runner, said spring engaging said pitman for the purpose specified.

13. A device of the character described, comprising a standard, upper and lower runners mounted to climb the standard, a disc mounted in the upper runner and provided with an eccentric opening, means for turning said disc, and a pitman provided at each end with an integral wrist pin, one of said wrist pins being j ournaled in the eccentric opening in the disk and the other journaled in the lower runner.

14. A device of the character described, comprising a standard, upper and lower runners mounted to slide on said standard, the lower runner being adapted to tilt on the standard into clutching engagement therewith, a pitman o'peratively connecting said two runners, means for locking said pitman, the upper runner being provided at its rear side with a chamber having an inclined wall and a lower opening and the upper runner being provided with a heel at one side of said opening, and a wedge block mounted in said chamber and spring pressed toward the standard, said wedge block having one end extending out through the opening and being provided with a lug arranged for engagement with the said heel, as and for the purpose set forth.

15. A device of the character described, comprising a standard, upper and lower runners mounted upon said standard, means for effecting a climbing action of the runners on the standard, and a lift bar pivotally mounted on one of said runners and arranged for detachable sliding engagement with the standard, the said runner and lift bar being arranged to constitute a wire clamp, as and for the purpose set forth.

16. A device of the character described, comprising a standard, upper and lower runners mounted upon said standard, the lower runner being provided with a side opening slot and a bore communicating with said slot, a pitman having its lower end detachablv seated in said slot and provided with a wrist pin mounted in said bore, and a detachablc operative connection between the upper end of said pitman and tllC upper runner.

17. A device of the character described,

ners mounted upon said standard, tile lower runner being provided with a side opening slot and a bore and a socket both connnunieating with said slot, a pitman having its lower end seated in said slot and provided with a wrist pin mounted in said bore, a spring in said socket adapted to bear against said pitman, and a detachable operative connection between the upper end ol said pitman and the upper runner.

In testimony whereol' l alli'x my signature in presence of two witnesses JAMES H. PEARSON. itnesses:

Amen G. Canuvs, J. L. OLIPIIANT.

comprising a standard, upper and lower run-

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