USRE14605E - Le roy willoub - Google Patents

Description

LE ROY WILLUUR.

JACK.

APPL 1cATioN min DEC. is. 19m.

Reissued Miu'. 4, 1919.

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2 SHEETS-SHEEI l.

' v @M01/Man LE ROY WILLOUR.

JACK.

APPLICAUON mEq uEc.1a.19\.

IE- Y Beissued- Mar. 4, 191%.

lvlll lUNITED sT TEs PATENT oEEioE.

LE nov WrLLoUn, or ASHLAND, omo, -Assicn on. To THE AsHLANi'J'rnonUcTs' co.,

ASHLAND, OHIO, A. COBPOBATIDN F OHIO.-

JACK.

Specication of llteissued Letters `Patent. Reisgud Mar, 4., 1919 Original No. 1,240,278, dated September 18,1917, Serial No. 171,976, illed Hay 31, 1917. Application for reissue led December 18, 1918. Serial No. 267,399.

To all whom it may concern: l

Be it known that I, LE ROY WiLLoUR, a vcitizen of the United States, residing at Ashland, in theL county of Ashland. and 6 State of Ohio, did invent certain new and useful Improvements in Jacks;v and it is hereby'declared that the following is a full, clear, and exact description of the invention, such as will enable others skilled in `the art to which it appertains to make and use the same.

` My invention relates to improvements in lifting jacks of thetype that embody a plurality of pawls, for raising and lowering the lift bar.

An important object of the invention is to provide means whereby the'pawls may be set into action for raising and lowering the liftbar, by a handle having a key or keyextension, whichco-acts with a control member, in turn controlling the operation of the pawls. e

A further object of the invention is to provide neans whereby the jack may be actuated for raising or lowering the lift bar thereof, without necessitating the operator getting under the automobile or other load to be lifted. y 1

Other objects and advantages of the in- 80 vention will be apparent during the course ofthe following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like 85 parts throughout the same,

- Figure 1 is a side elevation of a jack -embodying my invention,

Fig. 2 is a detail central vertical longitudinal section through the upper portion of the jack, showing the pawls and associated elements, with the control member shifted to the inactive position and the operating handle raised,

Fig. 3 is a horizontal on line 3-3 of Fig. 2,

Fig. 4 is a-detail 4-4 of Fig. 1,

Fi 5 1s a side elevation of a control# mem er,

Fig. 6 is a central vertical longitudinal sectional view'through the upper portion of the jack, showing the control member having lts'lower end shifted inwardly, and

sectional view taken section taken on line the handle in the lowered position, the pawls serving 'to lower the lift bar,

Fig. 7 "is a similar view, with the handle movedV to the upper position, and,

Fig-8 is a horizontal sectional view taken on line 8"-8 of Fig. `6.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, thenumeral 10 designates a tubular standard, provided at its lower end with a foot or base 11, having suitable reinforcing webs 12. Formed upon the upper portion of the tubular standard 10 and upon one side thereof, is a housing 13, comprising spaced sides A14.

' The numeralv 15 l designates` a lift-bar, mounted to slidewithin the tubular standard 10 and provided at its top with a head 16. The lift-bar 15 is also provided beneath this head with a' laterally projecting head 17, having a shank 18, operating through of the tubular standard 10. The lift-bar 15 may be provided at its lower end and upon one side thereof (see Fig. 4) Vwith a laterally extending' stop 19', disposed to contact with an inwardly bent finger 20, carried by the upper end of the` tubular standard 10. l The lift-bar 1.5 is provided upon one longitudinal side thereof with 'downwardly faced 'ratchet teeth 21, adapted to engage with an upper holding pawl 22 and a lower operating pawl 23. The operating pawl 23 is provided with alaterally' projecting exa longitudinal slot 19, in one side.

tension or lug24, arranged within an openv ing 25, whereby the pawl 23 may be moved outwardly, contacting with the pawl 22, thus bringing both pawls out of engagement with the ratchet teeth 21, and allowi he numeral 3,1.

designates a tubular that the element 30' lever, 'provided with A a enter the socket 31 and-having a sto `flangeA yor key-extension 53, u

' handle-socket, the forward end of which is provided with spaced ears 32. The ears 32 are provided at points near and spaced from their free ends with apertures 33, pivotally receiving the pin or element 30. he ears 32 are provided at their extreme forward ends-with apertures 34, receiving a pivot element v35, upon which is pivoted the operating pawl 23. This operating pawl has a recess 36. The pawls 22 and 23 are moved toward the ratchet. teeth 21 by the ends 37 of a spring coiled about the pins 30 and 35, as shown. This spring howeverL does not act upon the 'control-member 28.

The control-member 28 has an approxiv mately U-shapedbody portion 38, provided with heads 39 and 40.` The head 39 has a recess 41 formed upon the' rear side thereof, adapted for the reception of a stationary sto element 42, carried byl the casing 13, and) serving to positivelyv 'mit the swinging movement of the head 39 inthe forwardly direction. The head 40 is provided with a forwardly and downwardly projecting extension 43having a recess `or notch 44, for the reception of a dependin shank 45, rigidly securedr to the lower en fof the pawl 22. The extension43 also has an inclined cam face 45', to contact with the end i of an extension 46, rigidly secured to the lower end of the awl 23. -The extension 43 isy further provided with a trunnion or lug 47, to contact with a spring 48, coiled about ailug or trunnion 49," formed u on the casing 13. This spring 48 is stiffer t an the spring 37 and is adapted to overcome the same, andthe function-of the spring 48 isjto swing the head 40 of the controlmember 28 forwardly, lthus causing the pawls 22 and -23 to disengage the ratchet yteeth 21,"l in proper order, as will be more fully explained.

The numeralO designates an operating reduced shank 5l to 52. The shank 51is provided wit 'a key 2 onV the forward end thereof and at one edge. This key-exten sion affords a recess 5 4. f'

The operation of the jack is as follows: To raise the lift-bar 15, the shank 51- of the lever 50 is inserted into the handle socket 31, with thekey-extension 53 arranged uppermost. This` key-extension 53 cannot now contact with the head 40 but `may contact with thehead39. The operating vpawl 23, upon the down stroke of the handle socketwill engage with a selected ratchet tooth 21t'hereby raising the lift-bar a notch., yThe holdlng pawl 22 trips over the Vnext tooth 21, for holding the lift-barv against t downward' movement. When the handle socket 31 is swung upwardly, the key-ex` tenslon 53y contacts with the head 39,`swing `lngfthe kcontrol-member 28` in a. QQIIQSPOIld ing direction, whereby the shank 46 of the pawl 23 will not contact with the cam face 45', and the pawl 23 will the next lower ratchet tooth 21 and engage therebeneath, to again elevate the lift-bar therefore trip over 15 for a notch, upon the down stroke of the ,with the head 39. Uponthe down stroke of the handle socket 31, the pawl 23 rises and takes the load: off of the pawl 22,'whi1e the key-extension 53 kcont-acts with the head 40,

thus swinging the head 40 forwardly beyond its normal inner position (as the head`40 is notswung forwardly suiciently by the spring 48 to overcome the tension of the This key-extension is now adapted to v fcontact with the head 40 but cannot contact spring of the pawl 22). The shank`45 ofv the pawl 22 will now engage within therecess or notch 44, and the pawl 22 swung out of engagement with the tooth r221. Upon the upstroke of the handle sockety 31 the .key-extension 53 and associated elementaretain the holding pawl- 22 in thefouter position suliiciently whereby it will not engage beneath they adjacent tooth but beneath the tooth thereabove it, whereby the lift-bar 15 is lowered al notch, as the operating pawl 23 descends. VThe spring `48 now retains the control-member 28 in the active. position,l with its extension 43 -in' the most forwardly position. Therefore, as the -operating pawl 23 descends, carryingA the loadof the liftbar `15 the shank 460i the operating pawl contacts withV the cam face 45.

as above indicated, the cam face 45 will soon `as the load istaken by the holdingpawl 22,v

swing the pawl 23 rearwardly, out ofeni gagement with the ratchet tooth. This cam face retains the pawl in this rearward osition upon the up stroke of the socket ever .'37, whereby the, operating pawl does not engage beneath the, adjacent` tooth, bt beneath` the tooth next above, this awl thereby not elevating the lift-barl` or a notch,

upon the up stroke of the-handle socket 31,

4but elevating itV suiciently at or `near the end of the up stroke to take the .load off ofthepawl22. f

It is to be `understood thatk the form of myinvention herewith shownand described is to betaken as apreferred example ofthe same, and that various changes in the shape, size, and arrangement of parts mayy beresorted to without departing from the spirit of the invention or the scope of the subjoined claims,

Having thus described my invention, IA

claim: s s., 1. A. lifting jack of the character described. comprising a standard, a lift-bar -having slidable contactl therewith and provided with a longitudinal set of teeth, a

holding pawl connected with the standard Ithe teeth and having a shank, a handle socket pivotally` connected with the standard and pivotally carrying the operating pawl,y1elding means to hold the pawls in contact with the teeth, a pivoted control-member arranged to contact withfthe shanks of the pawls, means to swing the pivoted controlmember in one direction upon its pivot, and a lever adapted for insertion Within the handle socket and having a key adapted to alternately contact'with opposite ends of the control-member when the lever is reversed.

2.y In a lifting jack of the characterv described, a standard, a Alift-bar having slidable contact therewith and provided with a longitudinal set of teeth, a pair of pawls associated with the standard and adapted to contact with the teeth, a handle socket piv-V otally connected with the standard and pivmove the paw sl into contact with the teeth, a control-member pivotally connected with 'the standard and adapted to contact with portions of the pawls, and thereby control their operation, yielding means to swing the pivoted control-member -in one direction upon its pivot, and a handle adapted for insertion within the handle socket and provided with akey to alternately contact with spaced portions of the control-member, said key being laterally shitable into and out of the active position by upon its lon itudinal axis.

3. In a li ting jack ofthe character described, a standard, a lift-bar having slidable contact therewith and provided with a longitudinal set of teeth, a pair of pivoted pawls associated i with the standard and turning the handle adapted to contact with the teeth and provided at their pivoted ends: with depending `Shanks extending downwardly ,below the pivots, a handle socket pivotally connected provided near its with the standard'and carrying one pawl, yielding means to move the pawls into engagement with the teeth, a control-member pivotally connected with the standard and opposite ends with heads lowerend with an extension and near its adapted to contact with the shanks of the pawls, yieldingl means to swing the control member in one direction, and a handle adapted for insertion Ywithin the handle socket and having a key to project between said heads and contact therewith.

4. Ina lifting jack of'the character described, a standard, a lift-bar having slidable contact therewith and provided with a longitudinal set 'of teeth,v a handlel socket pivotally connected with the standard, a pair of pawls 'pivoted tothe handle socket and one pawl, yielding means to contactin with the teeth and carrying depending s anks, yielding means to move the pawls into contact with the teeth, a controlmember pivotally connected with the standard and provided at its-ends with heads and at its lower end with' an extension to Contact with the shanks of the pawls, yielding means to swingthe control-member in one direction, and a handle adapted for insertion within the handle socket and provided at one edge thereof with a key-extension having a recess formed upon side of the key-extension, said key-extension bein adapted for arrangement between the heas.

5. In a lifting jack of the character described, a standard, a lift-bar having slidable contact therewith and provided with a longitudinal set of teeth, a pair of pivoted pawls associated with the standard and adapted to contact with the teeth and carrying Shanks, yielding means to move the Y arranged between the contact elements.

6. A lifting jack of 'the character described, comprising a standard, a lift barslidably contacting therewith and provided with a longitudinal set of teeth, a holding pawl connected with the standard to engage the teeth, an operating pawl adapted to engage the teeth, a handle socket pivotally connected with the standard and" pivotally carrying the operating pawl, yielding means to move the pawls into engagement with the teeth, a controlling member carried by the rstandard and separate from and movable with relation to the pawls and disposed-near the pawls to contact with portions thereof, means to move the controlling member in one direction, and an operating lever having one end adapted to be inserted within the handle socket, said lever having an extension disposed upon one side of its longitudinal axis to contact with the .controlling member, said lever .when inserted in one position in the handle ,v socket serving to position the extension so that it coacts-with'the control member to cause the pawls to move the lift bar in one direction, said leverv being adapted to be removedl and insertedii position the extension so that it will coact with the control member for causing the pawls to move the lift bar in the opposite direction.

7 .A lifting jack of thel character de scribed, comprising a standard, a lift bar slidably contacting'therewith and provided ithe handle socket in an inverted position to' l in one direction, and a lever having one end at its forward en witha longitudinal set of teeth, a holding f' pawl connected with the standard to ena'e the teeth, an operatin pawl ada ted tgo gengage the teeth, a handle socket pilifotally connected with the standard and `pivotally carrying the operating pawl, means to move the pawls into contact with the teeth, a single control member separate from and mova le with relation to the pawls and carried'by the standard in coperative rela-- tion to the pawls 4to contact with'portions thereof, means to move the control member adapted to be inserted withinl the handle socket and havin a lon 'tudinal extension said ongitudinal extension being so positioned with respect to the longitudinal axis of the lever that when the lever is inserted Within the handle socket in one position such extension will coact with the control member so that it will cause the pawls to move the lift bar in one direction and when the lever is inverted and inserted within the socket member said` extension will then coact with said control member so that such control member causes the pawls to move the lift bar in the opposite direction.

' LE ROY WILLoUn;

In the resence of- J RYDER,

ff o'.

L. SMITH.

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