US118020A - Improvement in lifting-jacks - Google Patents
Improvement in lifting-jacks Download PDFInfo
- Publication number
- US118020A US118020A US118020DA US118020A US 118020 A US118020 A US 118020A US 118020D A US118020D A US 118020DA US 118020 A US118020 A US 118020A
- Authority
- US
- United States
- Prior art keywords
- improvement
- jacks
- lifting
- standard
- fulcrum
- 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
- 210000001364 Upper Extremity Anatomy 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 is an upright standard supported by a base or platform, B, which, if desired, may be mounted upon small Wheels or casters for convenience in moving' about.
- O is movable or sliding fulcruin placed in front of the standard, and connected thereto by a iiXed clamp or slide, d, clasping into the vertical grooves D, one upon each side of the standard.
- a bail-shaped pawl, E is pivoted to the standard at the point e, and surrounds the fulcrum O and engages with its ratchet or notched face F, furnishing a means whereby the fulcrum may be adjusted to any 'desired height Within the limit of the mechanism to suit various sized vehicles or other objects to be lifted.
- G is a lever, mortised, as indicated by dotted lines, to fit over the standard and fulcrum, and pivoted to the fulcrum at g.
- This lever is iitted with a check-pawl, H, which engages with a ratchet, I, upon the rear face and upper extremity of the standard, and serves to hold the lever in position after the lift is made.
- the lifting-jack so constructed affords a simple, cheap, and exceedingly durable device, capable of being adjusted to any sized vehicle without any detachment of its parts.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Ladders (AREA)
Description
NrrEn STAE STEPHEN D. JONES, OF BLUE ISLAND, ILLINOIS.
IMPROVEMENT IN LlFTING-JACKS.
Specification forming part of Letters Patent No. 118,020, dated August 15, 1871.
To all whom t may concern:
Be it known that I, STEPHEN D. JoNEs, of Blue Island, in the county of Cook and State of Illinois, have invented a new and useful Improvement in LiftingJacks 5 and I do decla-re that the following is a true and accurate description thereof, reference bein g had to the accompanying drawin g and to the letters of reference marked thereon, and being a part of this specitication, in Which- Figure l is a side elevation ,of my invention, and Fig. 2 a horizontal section on the line a x of Fig. 1.
Like letters of reference made use of in the severa-l figures indicate like parts.
To enable those skilled in the art to make and use my invention, I will proceed to describe the same With particularity, making use in so doing` of the aforesaid drawing.
A is an upright standard supported by a base or platform, B, which, if desired, may be mounted upon small Wheels or casters for convenience in moving' about. O is movable or sliding fulcruin placed in front of the standard, and connected thereto by a iiXed clamp or slide, d, clasping into the vertical grooves D, one upon each side of the standard. A bail-shaped pawl, E, is pivoted to the standard at the point e, and surrounds the fulcrum O and engages with its ratchet or notched face F, furnishing a means whereby the fulcrum may be adjusted to any 'desired height Within the limit of the mechanism to suit various sized vehicles or other objects to be lifted. G is a lever, mortised, as indicated by dotted lines, to fit over the standard and fulcrum, and pivoted to the fulcrum at g. This lever is iitted with a check-pawl, H, which engages with a ratchet, I, upon the rear face and upper extremity of the standard, and serves to hold the lever in position after the lift is made.
-The lifting-jack so constructed affords a simple, cheap, and exceedingly durable device, capable of being adjusted to any sized vehicle without any detachment of its parts.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-
The 'combination of the standard A having grooves D, the fulcrum C, clasps d, bail-shaped paWl E, ratchet F, lever G, pawl H, and ratchet I, all constructed and arranged substantially as described and shown. 4
" S. D. JONES.
Witnesses:
J. W. MuNDAY, J ULIUs WELCKE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US118020A true US118020A (en) | 1871-08-15 |
Family
ID=2187477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US118020D Expired - Lifetime US118020A (en) | Improvement in lifting-jacks |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US118020A (en) |
-
0
- US US118020D patent/US118020A/en not_active Expired - Lifetime
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