US108414A - Improvement in lifting-jacks - Google Patents
Improvement in lifting-jacks Download PDFInfo
- Publication number
- US108414A US108414A US108414DA US108414A US 108414 A US108414 A US 108414A US 108414D A US108414D A US 108414DA US 108414 A US108414 A US 108414A
- Authority
- US
- United States
- Prior art keywords
- lifting
- arm
- jacks
- improvement
- post
- 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
- 241001553178 Arachis glabrata Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
Images
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
- Figures l and 2 represent sideviews of' my iinpioved lil'tingjjack, showing it in different positions.
- This invention relates to a new lifting-jack, which is of extremely simple construction, and on which no pawls, clamps, onserews are required.
- rlhe invention consists in the combination cfa, lifting-lcver with a pivoted post and slidingarm, all parts being so arranged that they will operate without additional apparatus. "Ille simplestaml most practical device of the kind is thereby produced.
- a in the drawing represents the supportingbed or platform of my improved lifting-jack.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Emergency Lowering Means (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Percussion Or Vibration Massage (AREA)
Description
LORENZO D. WARREN, OF HAVANA, ILLINOIS.
Letters Patent No. 108,414, dated October 18, 1870,
lMPRGVEMENT lN LlFTlNG-JACKS.
The Schedule referred to in these Letters Patent and making part of the came.
To all whom it may conce/.
Be it known that I, Lon'nzvzo D. Wannes', of Havana, in the county of Mason and State of .lllinois, have invented a new and improved Lifting- Jaek; and I do hereby declare that the following is a full, clear, and ex-aet description thereof, which will enable others skilled in the arb to make and use the same, reference being had to the accompanying drawing,r forming part ot' this specification.
Figures l and 2 represent sideviews of' my iinpioved lil'tingjjack, showing it in different positions.
Similar letters oi' reference indicate corresponding parts. l
This invention relates to a new lifting-jack, which is of extremely simple construction, and on which no pawls, clamps, onserews are required.
rlhe invention consists in the combination cfa, lifting-lcver with a pivoted post and slidingarm, all parts being so arranged that they will operate without additional apparatus. "Ille simplestaml most practical device of the kind is thereby produced.
A in the drawing represents the supportingbed or platform of my improved lifting-jack.
From itprojects an ear, a, to which, by means of a pin, b, one arm, c, of :i T-shaped level', E, is pivoted.
,lo the other arm, d, ofthe lever B is pivoted, by a pnc, the lower end of a port, O.'
1) is the supporting or lifting arm of the jack.
It has at one end :in eye, f, which embraces the post U.
y means of' this eye the arm can be readily adjusted upor down on the post. Vhen, however, a weight rests upon the arm D, the same will be 'so inclined as to bend with two diagonally-opposlte corners against; the edges ofthe post. Thereby the arm is locked to the post. p
As long as the lever B is swung up so that its arms c fl will be nearly in a horizontal position, asin lie. l, the device will be in position to receive a weight. By then swinging the lever down, to bring the arms c d into'a nearlyr vertical position, as in iig. 2, the weight; on the arm D will be raised.
I am aware that a T-shaped lever and lifting-rod or bar have been combined hei'ore with lifting devices, but
What l claim as my invention, and desire to protect by Letters Patent, isW
The combination, with a' T-shaped vibrating lever, B, and lifting-bar C, of a xed l'ulc1um, resting on the bed A al, and the adjustable hook-arm D,all constructed and relatively arranged as and for the purpose speciiied.
LORENZO D. WARRE.L Witnesses:
JACOB WHEELER, W. J. ODLE.
Publications (1)
Publication Number | Publication Date |
---|---|
US108414A true US108414A (en) | 1870-10-18 |
Family
ID=2177888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US108414D Expired - Lifetime US108414A (en) | Improvement in lifting-jacks |
Country Status (1)
Country | Link |
---|---|
US (1) | US108414A (en) |
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0
- US US108414D patent/US108414A/en not_active Expired - Lifetime
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