US587730A

US587730A - Lifting-jack

Info

Publication number: US587730A
Authority: US
Publication date: 1897-08-10
Anticipated expiration: 1914-08-10

Description

(No Model.)

J. O. HAGKETT. LIFTING JAOK.

No. 587,730. Patented Aug. 10,1897.

1m: ucllms mm :0 movou no, wAsmnuw. u. c

UNITED STATES PATENT OFFICE.

JOHN C. l-IAOKETT, OF ST. LOUIS, MISSOURI.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 587,730, dated August 10, 1897.

Application filed May 3, 1897. Serial No. 634,881. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN C. HACKETT, of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Lifting-Jacks, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part hereof.

My invention relates to lifting-jacks; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed.

Figure 1 is a view in perspective showing my improved lifting-jack in position for use under the axle of a carriage, the parts of the lifting-jack being shown in the positions they occupy before the axle has been elevated. Fig. 2 is a side elevation showing the parts of the lifting-jack in their locked position that is, in the position they occupy after the load has been elevated. Fig 3 is a side elevation showing the lifting-jack folded up for transportation. Fig. 4 is a vertical sectional view taken through the joints transversely of the pivot-pins and showing the parts in the positions as shown in Fig. 1, parts being broken away to economize space.

My improved lifting-jack consists of three principal parts-namely, the vertical leg 5, the inclined or notched leg 6, and the hand-lever 7. The vertical leg 5 is a straight timber of suitable length and when seen inside elevation, as in Fig. 4, the upper forward corner of the leg is rounded, thus producing the segmental face 8. The inclined or notched leg 6 is sawed from a suitable stick of timber into substantially the form shown and when in position for use the lower face 9 is substantially straight from a point near the upper end of the leg to a point near the lower end of the leg. The face of the leg opposite the face 9 is substantially parallel with said face 9 before the notches 10 are cut. The notches 10 are substantially right-angled, and the sides of said notches are arranged at angles of substantially forty-five degrees relative to the face 9. In other words, one side of each of the notches is horizontal and the opposite side of each of the notches is vertical, and the face 9 stands normally at an angle of approximately fortyfive degrees relative to the ground-surface. The line of notches 10 extends from a point opposite the upper end of the face 9 substantially two-thirds of the way to the lower end of the leg 6. A semicircular body 11 projects downwardly and forwardly from the line of the face 9, and the extreme lower rear end of the leg 6 is rounded, forming the segmental face 12, and the face 13 extends from the lower one of the notches 10 to the segmental being at a slight angle face 12, said face 13 to the face 9.

The body 14 projects from the upper end of the leg 6 backwardly and downwardly from the line of the face 9. The face 15 of the body 14 is substantially vertical when the liftingjack is in its normal position, while the face 16 of the body 14 is in the form of a compound curve, uniting the face 15 with the face 9.

which one end of the handle 19 is inserted,

and the arms 22, projecting rearwardly from the sides of said box.

Assuming that the hand-lever is in the position shown in Fig. 1 or Fig. 4, the portions 23 of the arms 22 project in parallel positions downwardly from the rear edges of the side pieces of the box 21, and the portions 24 project backwardly from the lower ends of the portions 23 in substantially horizontal planes. A bolt 25 is inserted through the lower ends of the portions 23 and through the upper end of the leg 5, thus forming one of the pivotpins, and the bolt 26 is inserted through the portions 24 and through the body 14, thus forming the otherpivot-pin. The portions 24 project some distance backwardly from the bolt 26 and .engage closely against the side faces of the leg 6 and serve as a means of stiff ening the joints.

The parts are so arranged relative to each other that when the handle 10 is elevated, as

shown in Figs. 1 and 4, the rear face 27 of the upper end of the leg 5 engages the face 15 of the leg 6, as required to form a stifi joint between the hand-lever 7 and the leg 6 when the hand-lever is so elevated that the leg 5 IOC) will not rest upon anything. 1V hen the parts are in this position, the face 12 upon the lower end of the leg 6 forms a runner, upon which the jack may slide either forwardly or backwardly to the position for using and until the weight engages the desired one of the notches 10. Then the hand-lever is lowered until the lower end of the leg 5 rests upon the ground or other suitable support. Then the handle 19 is forcibly depressed until it engages the leg 5, as shown in Fig. 2. WVhen in this position, the upper end of the leg 5 is inclined slightly toward the leg 6 and the pivots and 26 are in substantially vertical positions, while the lower end of the leg 5 is slightly in front of a line drawn vertically through said pivots, thus locking the parts in such a way that the jack will stand alone as long as the load remains stationary and rests upon the jack.

When it is desired to fold the jack up out of use, the leg 5 is swung up against the face 9 of the leg 6 and the handle 19 is swung against the leg 5, as shown in Fig. 3. The jack may then be hung up by placing it in position against the wall, with a nail or pin fixed in the wall inserted through the opening 18.

I claim- A liftingejack consisting of the vertical leg 5, the inclined notched leg 6 and the lever 7;

- the Vertical leg 5 consisting of a straight stick end of the leg, having notches in its edge opposite the face 9 and having the body 14 projecting backwardly and downwardly from the line of the face 9 and at the upper end of the leg, the face 15 of said body being substan- 23 of said arms projecting downwardly in par-.

allel positions from the rear edges of the side pieces of the box and the portions 24 of said arms projecting backwardly from the lower ends of the portions '23; the bolt 25 inserted through the lower ends of the portions 23 and through the upper end of the leg .5, and the bolt 26 inserted through the portions 24 and through the bod y 14 of the leg 6, said portions 2+L projecting some distance back-wardly from the bolt 26 and engaging closely againstt'he side pieces of the body 14, and the

bolts

25 and 26 being such a distance apart that the upper end of the leg 5 will engage the face '15 upon the leg 6 when the handle is elevated and the segmental face 8 of the leg 5 operating close to the face 16 of the leg 6, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN C. IIACKETT.