US151365A - Improvement in lifting-jacks - Google Patents
Improvement in lifting-jacks Download PDFInfo
- Publication number
- US151365A US151365A US151365DA US151365A US 151365 A US151365 A US 151365A US 151365D A US151365D A US 151365DA US 151365 A US151365 A US 151365A
- Authority
- US
- United States
- Prior art keywords
- jacks
- uprights
- lifting
- lever
- improvement
- 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
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- 238000010276 construction Methods 0.000 description 4
- 230000000994 depressed Effects 0.000 description 2
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
- G05G5/06—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in one or a limited number of definite positions only
Definitions
- A represents the operating-lever of my lifting-jack, at one end of which are pivoted two foot-blocks, B B, one on each side.
- This end of the lever A is somewhat enlarged, and has two uprights, C C, pivotedto it at such a point that, when the lever is raised to a perpendicular position, the pivot-point of the uprights will be above and in front of the pivot of the foot-pieces B B.
- the uprights C G are held parallel by means of two staples, a a, one on the front and the other on the rear side.
- a sliding bar, D Between the uprights C C is placed a sliding bar, D, through the lower end of which is passed a pin, b, to enter L-shaped notches d. d, made in the rear sides of the uprights C O. There are a number of these notches made, so that the bar D can be adjusted to any required height, and when so adjusted the bar is held by means of the staples a a.
- the lever A is 'laid down on the ground, and the uprights placed vertically under the axle or other article to be raised, af-
- the foot-blocks B B being pivoted allows them to accommodate themselves to any unevenness of the ground.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Portable Nailing Machines And Staplers (AREA)
Description
M. DunNELL. lifting-Jacks.
Patented-May 26,1874.v
w No.151,365.
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MILTON DURNELL, OF LEESBURG, OHIO.
IMPROVEMENT IN LlFTlNG-JACKS.
Specification forming part of Letters Patent No. 151,365, dated May 26, 1874; application filed lFebruary 26, 1874.
To all whom it may concern:
Be it known that I, MILTON DURNELL, ot Leesburg, in the county of Highland and State of Ohio, have invented certain new and useful Improvements in Lifting-Jacks; and I do hereby declare th at the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.
rEhe nature of my invention consists in the construction yand arrangement of a liftingjack, as will be hereinafter more fu ly 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', in which- Figure l is a front view, and Fig. 2 a section, of my jack.
A represents the operating-lever of my lifting-jack, at one end of which are pivoted two foot-blocks, B B, one on each side. This end of the lever A is somewhat enlarged, and has two uprights, C C, pivotedto it at such a point that, when the lever is raised to a perpendicular position, the pivot-point of the uprights will be above and in front of the pivot of the foot-pieces B B. The uprights C G are held parallel by means of two staples, a a, one on the front and the other on the rear side. Between the uprights C C is placed a sliding bar, D, through the lower end of which is passed a pin, b, to enter L-shaped notches d. d, made in the rear sides of the uprights C O. There are a number of these notches made, so that the bar D can be adjusted to any required height, and when so adjusted the bar is held by means of the staples a a.
For operation, the lever A is 'laid down on the ground, and the uprights placed vertically under the axle or other article to be raised, af-
ter which the sliding bar D is adjusted to the proper height. The lever A is now elevated to a perpendicular position, thereby raising the uprights and sliding bar, with the article thereon, and throwing the uprights forward in front of the pivot of the foot-blocks, so as to remain in this position until the lever is depressed again.
The foot-blocks B B being pivoted allows them to accommodate themselves to any unevenness of the ground.
Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-
The combination of the lever A, foot-blocks B B, uprights C C, with L-shaped notches d d,
4the staples a a, and bar D, with pin b, all con structed substantially as and for the purposes herein set forth.
In testimony that I claim the foregoing as my own I aftix my signature in presence of two witnesses.
MILTON DURNE LL.
vWitnesses DAVID Knvenn, SUSAN KiNGER.
Publications (1)
Publication Number | Publication Date |
---|---|
US151365A true US151365A (en) | 1874-05-26 |
Family
ID=2220777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US151365D Expired - Lifetime US151365A (en) | Improvement in lifting-jacks |
Country Status (1)
Country | Link |
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US (1) | US151365A (en) |
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0
- US US151365D patent/US151365A/en not_active Expired - Lifetime
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