US1391594A - Jack - Google Patents

Description

1. TATTON.

JACK.

APPLICATION FILED DEC. I6. 1.920.

2 SHEETS-SHEET L.

5 HIIIIIMIIIIIH Patented sept. 20,1921.

g [Zar/2f @s A A J lun mlIlllllllllll' 1. TATTON.

MICK.

APPLICATION FILED DEc.16, 1920.

Patented sept. 20,1921.

2 SHI-IETS--SHEETv 2.

M fa 4111 Asmflfgmwl' n u @fw fr l -I UNITED *STATES jJoB marron, or vivoiriii BAY, oNT'ARIofcANAnA.

' JACK.-

'specification of Lettersratenf. Patented Sept. 20, 1921.

'Application led December 16, 1920.. Serial No. 431,280.-`

l provision of a jack so constructed that the same will have considerably greater 'lifting power than the jacks now in ordinary use. Another object of the invention is the provision of a jack So constructed as to provide for adouble lifting power, that is, a

direct upward pressure from the actuating lever to the raising mechanism and also an indirect power through cam mechanism operatively connected thereto.

Still another object of the invention is the provision of a jack such as above described in which the parts thereof 'ar'efso formed .as to render the said jack durable and less liable to get. out of order than the jacks now in use. Y j l A further object of the'invention is the provision of a jack such as above referred to including novel means for manipulating the pawls so that they will afct to raise or to lower the jack as desired.

A still further object 'of the invention is the provision of a jack such as -above'referred to, which will be comparatively simple vand inexpensive to -manufacture, reliable an'defiicient in use, and readily operatedA 1 f With the above and other objectsin view, the present invention resides in the vnovel features of construction, formations, Acom- -binations and arrangements of parts 'to be hereinafter vmore fully described, claimed, and illustrated in the accompanying drawings forming a partv of the present application, and in which: c 1,1

Figure l is a side elevation ofa j ack constructed in accordance withthe present vention;

Fig. 2 is a, side view of a bodyportion of the jack showing lowering the same; Y i

Fig. 3 is a similar view showing the pawls arranged for raising the same;

the pawls pesuoned Afor Fig. 4f isa vertical sectional view takenV through that portion of the invention shown in Fig. 3 with the operating lever in raised postion; Y Fig. y5 is a similar view showing the lever in lowered position.;

Fig. 6 is a horizontal sectional. view taken through the body portion of the jack; vFig. 7 is a similar view taken throughthe pawl actuating means; y

Fig. 8 is a detail sideview of the pawl actuating means and plate which supports the same;

- Fig. l9 is a detail perspective view of the connecting link; V l Fig. 10 .is a similar view of the upper pawl.; and,- v v l 7 Fig. 11 is a similar view of the lower pawl. y Q

n Referring now to the accompanying drawings by` corresponding characters of reference throughout the several views, the numeral 15 designates in general my improved jack, which comprises a base 16, from which extends a 'vertical standard 17 which is securely braced -by theribs 18 to the longer of which 4areIVA connected the usual handle members 19. v

i Anenlarged body portion 2O isformed at the upper end of the standard 17 and is provided vwith a vertical passage -21 which communicates with a corresponding passage 22 formed in thestandard 17.

In V.these passages 21 `and 22 is vertically mounted a lifting bar 234 which is provided at its inner edge Vwith avseries of rack teeth 2.4: for a purpose to b-elater explained. The bar 23 has secured to its upper end the usual head 25.

A Arecess k26'v is provided in the body portion 20 and opens through one side of the body portion as shown at 27.

, A: supporting plate 28 closes diate portion of `the-opening 27, while upper and lower plates 29 and 30 close the re- `mainder of the opening 27 .j These plates are firmly retained in position against7 displacelmentby the screw element-$31. i

the interine- Y,

The recess 26 is provided at its upper side with. a vertical extension 32 inwhich is slidably mounted a lifting block 33. This I -block 33 is normally forced toits lowermost position by a spring 34 which is seated in the recess 35 formed in the upper end of the block 33 and engages the upper end of the extension 32. i v

The outer edge of the block-33 is cutl away,l

as shown at 364 and provided with a substantially circular Yrecess V37 in which is pivotally engaged the rounded end .138 of a pawl 39 which is designed to engagethe teeth 24 above; referred to. and uponfthe upward movement of the block 33wraise theV bar 23,

Y. onewtooth at a time.

The outer edge ofthe bloclz 33 is provided with asecond circular recess 39, andadjacent one edge thereof a rounded extension 40. The recess 39 is adapted to receive the rounded nose 41 of the head 42 of an operating lever 43, while the rounded extension 40 of the block 33 is adapted to fit within the rounded recess 44 formed in the end of the head 42 adjacent the nose 41 thereof.

Obviously, as the lever 43 is forced downwardly in the direction of the' arrow in Fig.

4, the said head 42 will engage the block 33 forcing the same upwardly as shown in the position in F ig. 5. Y f 'A cam member 45 is pivoted as at 46l Within the recess 26 and is provided with an outwardly extending cam portion 47 adapted to be engaged by the lower side of the head'42. Y v v f The forward or inner end of the cam member 45 is provided with a recess 48 in which is inserted one end of thelink 49 the opposite end of which fits within a recess v50 pro-V vided in the lower'rendof the lifting block 33.- VObviously when the lever 43 is forced downwardly in addition to the head 42 by y its engagement with thevblockV 33 forcing the said block upwardly, the cam portion 47 of the member 45 will be forced downwardly, which forces the inner end thereof upwardly and through the medium of the link 49ilikewise forcesthe block 33 upwardly, thus increasing the lifting power of the jack.

A pawl 51 is pivotally mounted, as-shown at 52, in a recess53 in the lower end `of the body portion 20, and engages the teeth 24 of v .thel lifting blockV for .pressure thereon;v

gage respectively the pins 56 and 55.V

An arm 64 extends laterally from the shaft 57 being at 65.

AY spring actuated p awl 66 is disposed in the yfree e'nd'ofthe arm 64, and is designed to engage either the upper or lower notches y67 ori68 formed in the rack 69 secured to the inner edge of the opening 27. The plate 28 is held Vinposition against displacement by the fastening element 70 clearly shown in Figs. 1, 2 and 3.

Obviously when the shaft 57 is rotated so that-the pawl66 engages thel notch 67, the pawls 394 and 51 will be heldl in such kposition 'that the movement of the lever 43 raises held rigid thereon, as shown the bar 23, but when the shaft is turned so Y From the Vforegoingv description, taken lin connection.` ywith the accompanying drawings, Yit'will be 4manifest-tirata jack is provided which will fulfil all of the necessary requirements of such a device, and it should be understood in this connection', vthat iva rious minor changes in the specific details of construction'can be resorted to within-,the

scope of the appended claims, without'departing from the spirit or sacrificing any of the advantages of theinventioir! Having thus fully described the invention, what I claim as new and desire to protect by Letters Patent is Y 1. The combination in a jack, of a body portion, a'lifting bar mounted therein, a Y' lever operatively 'connected to` said lifting bar for raising'the latter, and additional means actuated by the lever 'for'raising said lifting bar.

llO

2:'The combination in aljacl` such asidescribed, of a body portion, a lifting bar slid-' ably -mounted therein, a lever operatively connected to the lifting bar, and a cammechanism operated; by thev lever for exerting upward' p-ressure upon the the actuation of the lever. V c

3. `A jack such; as described comprising a body portion,"a lifting bar slidably mounted therein, a lifting block mounted in the body .Y

portion, an operative connection betweenthe lifting block and the lifting bar, a leverfor actuating the lifting block, and additional means lactuated by the leverv and engaging 4. The ,combination in a device-ioff the character describedfof a body portion, a

exerting an upward i lifting bnn Sudnbiy mounted therein, n naing'block mounted in said body portionand operatively connected to the lifting bar, a lever mounted in the body portion for engagement with the' lifting block for actuating the latter, and a cam mechanism connected to the lifting block and actuated by the lever, substantially as and for the purposes set forth.

5. A jack such as described, comprising a body portion, a lifting bar slidably mounted therein, a head upon said lifting bar, rack teeth provided upon said lifting bar, a lifting block mounted in the body portion, a paWl carried thereby the rack teeth of the lifting bar, a lever mounted in the body portion andr having operative engagement with they-lifting block for actuatin the latter, 'additional means connected With the lifting block and the lever, and a second pawl mounted in the body portion of the jack and engaging the rack teeth.

6. In a jack such as described, the combination of a body portion, a lifting bar slidably mounted therein, a lifting block slidably mounted in the body portion, a pawl carried thereby, teeth provided upon the lifting bar for engagement with the pawl, a cam member pivoted in the bodyportion, a link connecting the cam member and the lifting block, an operating lever pivoted in the body portion and engaging the pivoted cam member and o eratively connected to the lifting block, an a second pawl pivoted in the body portion and engaging the teeth of the lifting bar.

7. The combination in a jack such as described, of a body portion, a lifting bar having teeth thereon slidably mounted in said body portion, a lifting block mounted in the body portion, a spring for forcing the latterk to its lovvermost position, a lever pivotally connected to the lifting block for raising the latter, a pavvl carried by the lifting block and engaging the teeth of the lifting bar, a second pavvl mounted in the body portion and engaging the teeth of the lifting bar, a cam member pivotally mounted in the body portion in the path of the lever for actuation thereby, and a link connecting the cam member and the lifting block.

8. The combination in a jack such as defor engagement Withchanginof scribed, of a body portion, a lifting bar having teeth slidably mounted in the body portion, a lifting block mounted in the body portion, a lever for actuating said block, a cam member actuated by the lever and operatively connected to said block, a pavvl carried by the block for engagement With the teeth of the lifting bar, a second paWl mounted in the body portion and engaging the teeth of the lifting bar, and spring members engaging said pavvl, as and for the purposes set forth. n

9'. The combination in a jack such as described, lof a body portion, a lifting bar having teeth therein slidably mounted inthe body portion, a lifting block mounted in the body portion, a pawl carried thereby for engagement with the teeth of the lifting bar, a lever for actuating thelifting block, a cam member for actuating the lifting yblock and operated by the lever, a second pavvl Vengaging the teeth of the lifting bar, spring members engaging said pawls, and means for the position of said spring members and saidv pavvls, substantially as and for the purposes set forth.

10. The combination in a jack such as described of a base, a shank extending therefrom, a body portion carried by the shank, a lifting bar having teeth at one edge thereof slidably mounted in the body portion of; the shank, a head upon said lifting bar, a lifting block slidably mounted in the body portion, a spring for normally forcing said block to its lowermost position, a paWl carried by the block and engaging the teeth of the lifting bar, alever operatively connected to the lifting bar foractuating the same, a

cam member pivoted Within the body portion and actuated by the lever, a link connecting the cam member and lifting block, a second paWl plivoted in the body portion and engaging t e teeth'of the liftingvbar, pins extending from said paWls, a rotatable block, springs carried thereby and engaging the pins projecting from the pavvls, `means for rotating the block, and means for locking the block in adjusted positions, substantially as and for the purposes set forth.

In Witness whereof I have hereunto set my hand.

JOB TATTON. o

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