US148465A - Improvement in lifting-jacks - Google Patents
Improvement in lifting-jacks Download PDFInfo
- Publication number
- US148465A US148465A US148465DA US148465A US 148465 A US148465 A US 148465A US 148465D A US148465D A US 148465DA US 148465 A US148465 A US 148465A
- Authority
- US
- United States
- Prior art keywords
- lifting
- jacks
- improvement
- lever
- slide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 description 4
- 230000000994 depressed Effects 0.000 description 4
- 241001556567 Acanthamoeba polyphaga mimivirus Species 0.000 description 2
- 210000001503 Joints Anatomy 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F15/00—Crowbars or levers
Definitions
- A represents the foot-piece, from which rises a square or rectangular post or standard, B.
- the slide C has a number of holes, .r w, at different heights, for the insertion of a pin, d, which pivots the two arms e e of the operating-lever D to said slide, at any height necessary, to cause, by its de pression, the raising of the wagon or other article under which the jack is placed.
- arms e e of the lever D are curved substantially in the manner shown in the drawing, and are connected with the post or standard B by means of pivoted bars h h, one on each side.
Description
Lunnis. Lifting-lacks.
10.148,465. PatentedMmmm.
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UNITED STATES PATENT OFFICE J USTUS J ONES, OF BURTONVILLE, NEW YORK.
IMPROVEMENT IN LIFTING-JAcKs.
Specification forming part of Letters Patent No. 148,465, dated March 10, 1874; application tiled February?, 1874.
To all whom it may concern.'
Be it known that I,l J. JONES, of Burtonville, in the county of Montgomery and State of New York, have invented certain new and useful Improvements in Lifting-Jacks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had t0 the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.
The nature of my invention consists in the construction and arrangement of a liftingjack, as will be hereinafter more fully set forth.
In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, which represents a side elevation of my lifting-jack.
A represents the foot-piece, from which rises a square or rectangular post or standard, B. To this postare secured metal loops or sockets a a, through which passes the vertical slide O, provided, near its upper end, with a projection, b, on the front side, for the article to be raised to rest upon. The slide C has a number of holes, .r w, at different heights, for the insertion of a pin, d, which pivots the two arms e e of the operating-lever D to said slide, at any height necessary, to cause, by its de pression, the raising of the wagon or other article under which the jack is placed. The
arms e e of the lever D are curved substantially in the manner shown in the drawing, and are connected with the post or standard B by means of pivoted bars h h, one on each side.
The arms e cot' the operating-lever being 4adj 1ste-d and fastened to the slide O by the pin d, the lever D is depressed, which raises the slide; and when the lever is depressed as far as the joints will permit, it will be seenthat the point y, where the bar his pivoted to the arm e, will be'slightly in front of a line drawn from the pin d to the point z, where the bar h is pivoted to the standard, and hence the weight upon the slide has the tendency to hold -the lever more iirmly in its position, and con- D. C. CHASE, J. L. CHASE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US148465A true US148465A (en) | 1874-03-10 |
Family
ID=2217878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US148465D Expired - Lifetime US148465A (en) | Improvement in lifting-jacks |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US148465A (en) |
-
0
- US US148465D patent/US148465A/en not_active Expired - Lifetime
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