US1416912A - Jack - Google Patents

Description

W. J. TRUMPOUR AND W. WIRTH.

JACK.

APPLICATION FILED 0Ec119 19.19.

Patented May 23, 19220.

ZMJ Wzm p m: 'ema WILLIAM J. TRIJ'MPQUR, 9E CHICAG-G, ILLINOIS, AND EVENCEL WIRTH, OF ST 'WIRTH AESIG'NUR TU firl/AID TRUMPO'UE.

Josnrir, linear-can;

JACK.

Application filed. December 19, 1919.

To all iii/mm it may cmucrn:

lrle it known that we. l l lLLTACiK illaoir- Penn and llhnvoni, WL citizens of the United States. residing at Chicago. in the county of Cool: and State of lllinois and Sir. Joseph. in the county of Berrien and State of lilichigan. respectively. have invented certain new and useful Improvements in Jacks, of which the following is a specification.

The invention relates to 1i: 1, 137 iaclrs such as employed in lifting automobiles and the like, and has for its general aim the provision of a jack which can be conveniently operated from a point removed a substantial distance from the jack.

The general object of the invention is to provide a jack of a very practical character in. that it is simple in construction and positive in operation.

the ratchet Wheel.

.in iu'iportant object Off the invention to provide a jack which may he operatei'l with an extreme] y short stroke of the operating lever from an initial horizontal position to an uppermost position at a minimum de- ,eji'ce of inclination.

further object of the invention to pro-- vide reversing mechanism. which may be readily manipulated by means of an extension operating handle.

A. further object oil? the invention is to pro vide an improved construction for the operating handle. i

The objects of the invention tl'lllS gener' ally stated, together with other and ancillary advantages, may be attained by the con .struction and arrangement illustrated in the accompanying drawings forming; part hereof in which, Figure 1 is a side elevation of a jack. embodying; the features of our invention. Fig. 2 is horizontal section through the jaclz taken on line 2-2 of Fig. 1. Fig. 3 is a fragmentary vertical section through the operating mechanisof the jack. F ig. 4 is a perspective view of the reversing member. Fig. 5 is a fragmentary side elevation. of the extension operating handle.

The jack comprises generally a standard 1, a bar 2 provided with rack teeth 3, a pin ion 42 meshing with the rack bar, a ratchet wheel 5 riqid with said pinion, and an opcrating lever 6 having an actuating; member "7 therein adapted to engage operatively with 8 designates a holding Specification of Letters Patent.

Patented illifay 23, 1922.

Serial No. 346,129.

do adapted to coact with the ratchet Wheel at l 9 is a reversing member.

She standard 1 having a supporting base 10 is made hollow to receive the rack bar 2, and its upper portion is enlarged as at 11 forming a housing to receive the actuating mechanism and having an opening 11 in its forward wall. The rack bar 2 may if desired, carry a step 12 of usual construction.

The rack bar 2 may be guided by the standard 1 for vertical movement in any suitable or preferred manner; and the pinion 4: meshing with the rack teeth 3 of the rack bar, together with the ratchet wheel 5, mounted on a pivot pin 13 carried by the lwusing 11.

The operating lever 6 is forked at its for' ward end to provide arms 14 and 15 adapted to receive neatly between them the pinion 4. and ratchet wheel 5, the said arms'being' also pivotally mounted on the pivot pin 13. i The space between the arms 14 and 15 is reduced t theirjunction to neatly receive the actumember 7 (Fig. 2) which is alined .h the ratchet wheel 5 "for operative engagement therewith.

The actuating member 7 a pivot 16 (Fig. 2) and has upper and lower fingers 7 and "7 and a rearwardly extending arm 17. A. controlling spring 18 entered in a socket 19 formed in the han dle bears against said arm 17 and tends to force the arm 1'"? to one side or the other of dead. center so as to hold either the finget 7 or the finger 7" in operative engage ment with the ratchet wheel 5. Normally the lower linger 7 is held by the spring 18 in engagement with the ratchet wheel 5.

"The holding member 8 is mounted on a pin 19 carried by the housing 11 and has a downwardly extending" finger 20 which is normally held in engagement with the teeth or". the ratchet wheel 5 by means of a spring 21. The ratchet wheel 5 is made of a diameter substantially greater than the pinion 4 and with a substantially greater number of teeth, and the parts are so arranged that upon an up-and-down movement of the lever 6, the ratchet wheel is rotated one tooth at a time, the member 8 serving to hold the rack bar against descent during the upward movement of the lever. It will be seen that by the use of aratchet wheel having a relafor this purpose a cross pin tively greater number of teeth than the pinion 4, the lengtl'i of stroke of the operating lever is reduced to a minimum. This is advantageous in the operation of the jack in that the tendency of the operating handle to strike parts of the vehicle which is being raised or lowered is substantially reduced.

The reversing device comprises a Hat member or plate 9 which is entered between one arm of the operating lever 6 and the adjacent wall of the housing. and is mounted upon the pivot pin 13. For receiving the pin 13, the plate 9 is provided with an elongated opening 252', and for guiding the plate for movement longitudinally of the operating lever, the plate has a slot 23 adapted to receive a guide stud 24: projecting from the side of the lever 6; and as an additional guiding means the lever is provided with a stud 22 for coacting with the opening 22 in the member 9. Upon its upper inner edge the plate 9 carries a cam member 25 in the form of a coiled spring which serves to control the movements of the holding member 8. To this end, the cam member 25 is arranged to engage with the holding member 8, when the member is moved to its outermost position as determined by the pin 13 engaging with the forward or inner end of the elongated opening 22. Thus, referring to Fig. 3 (dotted lines), it will be seen that when the reversing device is in its outermost position, the cam member 25 serves to hold the holding member 8 out of engagement with the teeth of the ratchet wheel. 5 until the lever 6 approaches the limit of its upward movement, whereupon the finger 20 of the holding member is permitted to engage with the ratchet wheel. In this operation, the holding member is controlled by the cam member 25, which, as the lever moves upwardly, moves inwardly away from the holding member; and by the time the finger engages with the ratchet wheel it has escaped past one of the teeth thereof to permit a gradual lowering of the rack bar.

In order to effect such downward movement of the rack bar, it also becomes necessary for the finger 7 of the actuati g member to escape past a tooth of the ratchet wheel in the downward movement of the lever. This is eiiected by a reversal of the position of the actuating member against the action of its controlling spring 18, and

V 27 is carried by the housing in position to be engaged by the finger 7 of the actuating member when the lever 6 is swung to its uppermost position. After such reversal of the position or" the actuating member, the member is again moved into its position upon completion of the downward stroke of the lever by reaspn of the cam engagement of the finger 7 with the lower edge o t the opening! in the forward \"all ol the housing. lv'hnn thus moved into its normal position. the actuating member engages with the ratchet wheel to lock it against rotation relativito the lever. so that in the upward movc ment of the lever, the rack bar descend: until the finger 10 of the holding: member engages the ratchet wheel preventing :1 further downward movement of thc IHr'l. bar until the lever is again swung upwardly and the actuating member again reversed.

To prevent an accidental movement of the reversing device. the opening :22 in the member 9 is provided in its upper edge with a pair of notches 2S and 29 adapted to receive the pin 13; and the spring cam member 25 is adapted to bear upon the holding); member so as to vieldingly hold the member 9 downwardly with the pin engaging in either one of said notches.

For the purpose oi preventing: a reversal of the position of the actuating member 7 by reason oi the movement of the hand lever upwardly to such an extent that the finger 7 oi theactuating member cmrages the pin 27 in the housing to shilt it, we have. provided a stop IV) on the. reversing! device. This sto may be in the form of an integral lug. and is adapted when the re versing device is in its innermost or clcvals ing position to engage with a sum-shoulder 31 (Fig. 1) provided in the adjacent wall of the housingll. It will be uinlcrstood that when the reversing device is ll'l(l'\'(.(l out.- wardly to the reversing position that the stop 30 is moved therewith so as to clear the stop-shoulder 31 on the housing); whereby to permit the upward movement oi? the hand lever snliiciently to effect a shitting of the actuatin member.

hen. the reversing device is in its outer or operative position, the actuating dog may be manually controlled to permit of 5! (rec movement of the racl; bar. in such l'lQPltlOll of the reversing (l8\"iC. the li self ot' the holding member 9 I vill heremembered. held by the s n i engagement with r cordingly. if the on thum and torch, member 7 into a neutra position s that neither of the fingers "I" or T' engm ne with the ratchet whcclthe rack bar. it will be apparent. is released.

In order that the jack may be nninipnlated from a point removed therefrom a substantial distance, we provide on the mem her 9 of the reversing; device on operating. stud 82 with which the hooked, end of" an extension handle may on a qc. Referring to Fig. the handle prei blv comprises two sections and 33 arranged to be sooured together either in extended or collapsed torm. The section 23 is provided l-ill .llll) llt with a hook I341t suitably formed in the eX- treme end thereof, and said end is adapted to be inserted in the usual socket of the opcrating handle. T he hook is so shaped as to provide a shoulder 35 for engagement with the operating stud 32 of the reversing device to move it inwardly. Herein the means for connecting the two sections to gether comprises a bolt 36 carried by the section 33 and entered through a slot 37 in the opposite section, with a wing-nut 38 for locking the two sections together. A headed stud 39 is also carried by the section 33* and is arranged to enter a bayonet slot 40 and looked in position therein by the wing-nut 38.

Vi e claim as our invention:

1. A jack comprising, in combination, with a standard having a raclr bar mounted for vertical movement therein, a pinion pivotally mounted relative to the standard and meshing with the rack bar, a ratchet wheel. of greater diameter than the pinion and rigid therewith, an operating handle piv oted co-axially with said pinion and having an actuating member for operatively engaging said ratchet, and a holding member ei gagiiig said ratchet for preventing rotation of the pinion.

2. A jack comprising, in combination with a standard having a 'ack bar mounted for vertical movement therein. a pinion pivotally mounted relative to the standard and meshing with the rack bar, a ratchet wheel of greater diameter than the pinion. and rigid therewith, an operating handle piv oted co-axially with said pinion and having an actuating member for operating the same, and a holding member for said rack bar adapted to coact with said ratchet wheel.

3. A jack comprising, in combination with a standard having a rack bar mounted for vertical movement therein, a pinion pivotally mounted relative to the standard and meshing with the rack bar, a ratchet wheel of greater diameter than the pinion and rigid therewith, an operating handle pivoted co-axially with said pinion and having an actuating member for operating the same, a holding member adapted to coact with said ratchet wheel, and means mounted upon the operating lever for controlling the holding member.

4. In a jack, the combination of rack bar, a pinion meshing with the rack bar, a toothed wheel rigid with the pinion, an operating lever having an actuating member For operatively engaging said toothed wheel, a holding member also adapted to engage with said toothed wheel, and a cam member carried by the operating lever and movable relative thereto to control the position of said holding member.

5. In a jack, the combination of a rack bar, a pinion meshing with the rack bar, a

toothed. wheel rigid with and oil greater diameter than the pinion, an operating lever having an actuating member, a holding member coacting with said. toothed wheel to prevent movement of the rack bar, means operatively associated with the operating lever for controlling the position of the holding member, and means for controlling the position of the actuating member operable in the movements of the lever.

6. In a jack, the combination of a rack bar, a pinion meshing with the rack bar, a toothed wheel rigid with the pinion, means operatively engaging the toothed wheel to rotate it step by step, a holding member for the rack bar, and a reversing d vice operatively associated with the holding member and the actuating means, said device comprising means adapted in its inoperative position to maintain the same normally so.

7. In a jack, the combination of a rack bar, a pinion meshing therewith, a toothed wheel rigid with said pinion, means operatively engaging the toothed wheel to rotate it step by step, a holding member for the rack bar, and a reversing device operatively associated with the holding member and the actuating means, said reversing device comprising a member pivoted (.iOdXltLllY of said pinion but shi ftable relative thereto and ha-ving a cam member adapted to engage with the holding member to control its position.

8. In a jack, the combination of a rack bar, a pinion meshing with the rack bar to move it, a toothed wheel rigid with the pinion, a hand lever having an actuating member for engaging with the toothed. wheel, a holding member also adapted to engage with the toothed wheel, a reversing device carried by the lever and having a cam portion movable into engagement with the holding member to move it out of engagement with the toothed wheel in one position of the lever, but permitting such engagement in another position of the actuating lever.

9. In a jack, the combination of a rack bar, a pinion meshing with the rack bar, a holding member for the rack bar, means including an actuating lever for rotating said pinion, and reversing device operable in the movement of the lever to control the movement of the holding member, said device comprising means operable when the sam is in inoperative position to maintain the same normally in this relation.

1.0. In a jack, the combination. with a rack bar and a pinion meshing therewith, of a holding member for the rack bar, means for rotating the pinion comprising an operating lever, an actuating member carried by the operating lever, means with which the actuating member is adapted. to engage in the movement of the lever in effecting a reversal of the jack, a reversing device mounted for movement with the operating lever and adapted to engage the holding member, and means carried by the reversing device adapted in the inoperative position thereof to prevent a shifting f the actuating member in the movement of the lever.

1 In a jack, th combination with a rack bar and a pinion meshing with the rack bar, of a holding member for the rack bar, an operating lever having an actuating member, means arranged for shifting the actuating member in the operation of the handle to effect a reversal of the ack, a reversing de vice comprising a member mounted for movement longitudinally of the lever and having a part arranged to engage the holding member, and means for limiting the upward movement of the operating lever to prevent a shifting of the actuating member when the reversing device is in its inoperative position.

12. In a jack, the combination of a rack bar, a pinion meshing with the rack bar, a holding member for the rack bar, a lever operatively associated with the pinion, means for controlling the holding member including a movable member, and a handle adapted to engage either with the operating lever or with said movable member to actuate it.

13. In a jack, the combination with a rack bar and a pinion meshing therewith, of a toothed wheel rigid with the pinion, a holding member for the rack bar, an operating lever having an actuating member adapted an operating lever provided with a socket,

and a reversing device carried by the operating lever and movable longitudinally thereot to effect a reversal of the jack, ot a handle adapted to engage in the lever'sochet and provided with a hooked portion for engaging with the reversing device to operate it.

l5. In a jack, the combination with a rack bar and a pinion mounted on a pivot and meshing with the rack bar, of an operating lever having an actuating member operatively associated with the pinion, a reversing device comprising a plate having an elongated opening ior receiving said pivot, said opening having a pair of notches in which said pivot is adapted to engage, and a spring member carried by said plate adapted to engage with the holding member and tending to hold said plate in position with the pivot engaging in either one of said notches.

In testimony whereof we have hereunto set our hands.

WILLIAM J. TRUMPOUR. VENCEL W'IRTH.

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