US1859993A - Lifting jack - Google Patents

Description

May 24, 1932- D. w. SESSIONS LIFTING JACK- Fi'led Aug. 4, 1950 2 Sheets-Sheet l May 24, 1932. D. W SESSIONS LIFTING JACK Filed Aug. 4, 1950 2 Sheets-Sheecl 2 Ingen-for.'

Wited 58.515; ./2'-,

Lons,

f f UNITEDfermesl Pnl'rElin?!'v fOF-FICi-ff Patented May 24, 1932 DONALD4 WiLFRED snssroN's, or' FINCHLEY, LoNnoN, ENGLAND 'LIFTINGJACKl Applieatian med August 4, 1930, serial No. 472,912, @mafia Great'iaripain october' `1,5, 1929.'l

l rlhis invention relates toilifting jacks.

According to the invention a lifting' ack has incorporated-therewith a casing com-V prising separable portions adapted to be moved into co-operationto enclose the jack when the latter is collapsed. The casing preferably comprises a container within which the collapsed jack lis housed andV a lid mem# ber or members secured to the jack and adapted` to be moved thereby to form a closure to the container when the j ack is collapsed. In. applying the invention to a jack of thekind comprising two sets of four bars arranged in the form of a lazy tongs or toggles device (adjacent bars acting as toggle levers) and a screw device for movingthe pairs of outer ends of the bars towards or away from each other, a lid member may be secured to the corresponding lower bars of adjacent sets thereof. The inner ends of the'lower bars may be attached to a common member having a casing secured thereto with which the lid members co-operate to forma fclosure to the container. l i

In order that the said invention may be clearly understood and'readily carried into effect the same will now be described Tmore fully with reference to `the Iaccompanying drawings, in which u Figure l is a view ofajackcasing oonstructed in accordance with the invention, the'left half being in longitudinal section and the right half inside elevation. y

Figure 2 is a plan view thereof, the left half being a top plan and the right half a bottom or'under plan'.V l 1 A Figure 3 is an end view, the right haltet which is in longitudinal section. 1 Y Figure i is a side elevation of the jack in the open condition, andy Figures 5, 6, 7 and18 are details to be described.' Y

The container A is suitably shaped' toenclose vthe j ack and is adapted to be closed by a central pressing B and lid members C, C1. The jack 'co-mprises two sets ofV `four bars (one set only .being illustrated in Figurei) the! pairs of upper bars D, D1, being pivoted at (l, all,V respectively to a horizontal anchor plate E towhich the container A1 is secured v3ectio11s C3 formed by pressing inwardsl a por.-

by screws {(not shown) passinglthroughapery tures a inthe container. The outerends Oli Y the bars D,'D1, are' mounted on'pivot [studs deg-d4, carried Aby blocks F, FH The outer ends ofthe pairs of Vlower bars 'G, `Girare also mounted on 'thestuds did* andV their in-J ner ends are pivoted toa base member ,G3 Ato Y which the central pressing B 'is secured by The lid membersC, C1,- are/bolted or riveted to horizontally disposed lugs provided on the lower sides' of the ybarsG,` G1,respectively, and theirV side marginal portions C2 are bent upwards and extend into lproximity to pro? tion of the container A at each side thereof;

r stitution of a deeper plate or adistance piece.

This arrangement assistsin preventing in:

gress `of water and dirt tinto the interiorot the casing and serves to render -thesides lof* the caseA rigid and stiff. For these purposes.

bentupwards and their inner ends `C?" are bent downwards and slide over and in` contact with the rounded ends of-thepressing the upper bars mesh with thosevoi'` the lower v bars when the jack iscollapsed therebyffaf cilitating "collapse lofthejack to a ,small height., Corresponding pairs fof thefupprer i bars are secured together'byfstud'sD4 so that movementA of the Vbars in unison 'is ensured and so' that they` are renderedrnoreA rigid'. The studs D4 are secured to projections or bosses D3 on the bars so thatthe' studs do notrinterfere with the Complet@ collapsing Inove-v ment of the upper and lower barsy 4The ends of the plate E Yare extended transversely over the ,bars D, D1, and between thesetransverse i ends the plate islocatedfbetween the two sets of bars ,the bars DD1,"are`shaped to f i.

avoidtheir ,contacting lwith the transverse 75 f also the outer ends (l4 of the lid members are f Y ends of the plate so as to permit complete collapse of the jack. By this arrangement the upper surface of the plate E does not eX- tend substantially above the bars D, D1, and the jack when collapsed occupies a small space vertically thereby enabling the container A to be small and of neat appearance. The container A is formed with two longitudinal slots A1 through which the heads of T-shaped bolts yE5 can be inserted into corresponding slot-s E1 in the plate E, the slots E1 being of inverted T-shaped cross-section so that when the heads of the'bolts E5 (see Figure 6)Y are inserted therein and rotated the heads willV be anchored in the plate E. Means supported by the aXle,'spring, or other suitable part of the vehicle, are provided to which the boltsE5 are secured. One formof such means is illustrated in Figures 5 and 6 and comprises two angular members or plates Kv ofV T-shap'ed end'vieweach having a lower horizent-al limb 7: andlupper limbs 701 inclined to the horizont-also that their outer endsfare lower vthan their inner ends. The limbs 7:

are Vclamped firmly to the plate Eby the bolt heads are rounded as shown, and rounded washers 7:5 are provided at theiropposite ends. This arrangement is particularly suit- .able for attaching the jack to a rear axle spring as it provides a clearance rfor the spring bolts 7&6. ,For securing the jack to the'front axle t-he container A is provided at each end with two transverseslots A7 and f thevtransverse ends of the horizontal plateE are provided n with corresponding slots or grooves E7.ofs1milar cross-sectional shape to theslots E1. YThe supporting bolts 702 de pending fromv the plate 7c1'located above the aXle J1 are formed with rectangular heads $768 to be engaged in the slots E7 (see Figure 7 The surfaces of theslots E1' that are engag-ed byA the bolt heads are inclined so that.

the bolts slip. towards each other when they are tightened. v Ifthe ack is secured to the centre of an axle a jaw M (see Figures 7 and surea firm bedding of the aile thereon. They jaws are formed with downwardly projecting studs or tongues m engaged inthe slots ed portions that are screwed through thread-- ed apertures in the blocks F', F1, respectively, so that when the vspindle is rotated the blocks F, F1, and consequently also-the pairs of outer ends-of the bars, will be moved towards or away from each other thus opening or-collapsing the ack. The left hand end (Figure 1') of the containerA is suitably shaped at A3 to receive one end Vof the spindle and the Vright hand end is similarly shaped and provided with a slot vAl1 through which the other end of kthe spindle passes. Suitable provision may be made for preventing undesirable rotation of the spindle P due VJfor exampleto Y vibration whilst .the vehicle is in motion. These means may comprise spring washers N which are compressed between washers N 1 P, whenthe jack is collapsed, ormay comprisea-weighted-lever. The outer end (notk shown) 'of the screw spindle is suitably adapted vto be Ymoved apart bythe blocks F, F1, and shoulders or collarsNzonthe-.spindle shaped to engage in a socket in a device for rotating it.

' VVhatI claim and desire to secureby Letters Patent of the Unitedl States is Y l.y A lifting jackV comprising two sets of four bars arranged-side by side and pivoted together to form a toggles device, a screw-device for moving the pairs of outer ends of the barsrtowards or away fromV eachother, a casing secured to the jack and'adapted to contain the 'jack when collapsed, and alid member secured vto'each of two pairs of corre'- sponding bars so. that whenV the' jackis collapsed said bars move the lid members to forma closure'toV the casing.

2. A'lifting jack `according to claim l, in which a lid member' is secured' to the jack; between the lid members that are secured to theY bars. l

3. A lifting jack comprising two sets ofA four bars each locatedside by side and pivoted together to form a toggles device, a screw device operatively connected with said bars, a casing secured tothe device above the upper ends thereof and adapted to contain the-collapsed jack, a middle li'd member Ysecured vto the inner ends of the lower nbars, and a lid membersecured to each pairof corresponding lower bars, all the l-id members being moved into co-operati-on to form a closure to the casing whenfthe ack is collapsed. 4l. A lifting jack comprising a horizonta,

Yplate forming an anchorage for bolts whereby the jack is attached to a motor car, Vtwo sets of'four bars one'set ori-each side of the horizontal plate and pivotedto-gether to form a quadrilateral toggles device the inner, ends ofthe upper bars ofY which *are `pivotedto ing on the ground to which the inner ends of the lowerV bars are pivoted, a container having a top secured above the horizontal plate and side walls extending. downwardly, and

adapted to contain the toggles and screw de- Y vices when the jack is collapsed, a lid member secured to the member for resting on the ground, and a lid membersecured to each l y pair of corresponding bars of the two sets,

said lid members being all moved into co-operation by the toggles device when the latter is collapsed t0 form a closure to the container. 5. A lifting jack as in claim l, wherein the top of the casing is provided withrsolts to Y receive the heads of bolts whereby the jack is secured to a part of a motor car and with an aperture to receive a downwardly eXtending projection on a block adapted to engage said part.

6. A lifting vjack comprising to gle bars, means to open andcollapse said ars, two Y members secured to the lower toggle bars so as at all times to be parallel to the vbars to which they are attached,means attached to the jack and adapted to cooperate with said two members whenthe jack is collapsed-t0 form a casing enclosing the jack. Y

7. A lifting jack comprising two sets of four bars arranged side by side and pivoted together to form a toggles device, a screw device for moving the pairs of outer ends of bars towards or away from each other, two l members secured one to each pair of corresponding lower bars in the two sets so as at all times to be parallel to the bars to whichr they are attached, and means attached to the jack and adapted to co-operate with said two members when the jack is collapsed to form a casing enclosing the ack.

8. A lifting jack comprising two sets of four bars arranged side by side to form a toggles device the lower ends of 'all the lower bars being permanently adjacent to each 5 other, a container attached to the upper bars and adapted to contain substantially the Y whole of the bars when the jack is collapsed, and two lid members secured one to each pair of corresponding lower bars in the two sets so as at all times to be parallel to the bars to which they are attached, the arrangement being such that when the j ack is collapsedthe bars move the lid members to form a closure to the container. i j

DONALD WILFRED SESSIONS. n

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