US152608A - Improvement in lifting-jacks - Google Patents
Improvement in lifting-jacks Download PDFInfo
- Publication number
- US152608A US152608A US152608DA US152608A US 152608 A US152608 A US 152608A US 152608D A US152608D A US 152608DA US 152608 A US152608 A US 152608A
- Authority
- US
- United States
- Prior art keywords
- lever
- lifting
- pawl
- improvement
- jacks
- 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
- 108060002523 ELOVL6 Proteins 0.000 description 2
- 230000000994 depressed Effects 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
- B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
- B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
- B66F1/04—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
- B66F1/06—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being actuated mechanically
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S254/00—Implements or apparatus for applying pushing or pulling force
- Y10S254/03—Jack handles
Definitions
- FIG. l is a side elevation of my liftingjaclr.
- Fig. 2 is a longitudinal section of the operating lever and pawls, with a part of the movable upright.
- Fig. 3 is a horizontal section through the line .r x, Fig. l.
- Figs. 4 and 5 are cross-sections of the handle through the lines g/ y and x m, respectively.
- A represents the base or bed piece ot' my lifting-jack, upon which is firmly secured an upright standard.
- this standard is constructed, as shown in Fig. 3, of two uprights, B B, with a back, B1, and two front cross-bars, I32 B2, firmly bolted thereto.
- the back B1 is omitted, and two cross-bars used on this side also.
- this upright standard is placed the movable cured plates E E, which extend inward in front of the movable upright C close to the rack-bar a.
- On each of the plates E is a forward-projecting ange, E', said plate and iiangc, with braces b b, being all cast in one piece, as shown.
- G represents the operatinglever, on each side of which, at the inner end, is secured a cast plate, G'.
- These plates are each provided with a ange, d, on the upper edge, and a ange, d', on the lower edge, which flanges extend inward and t over the top and bottom of the lever G.
- the plates G G are pivoted between the anges E E by means of a single bolt, f, passing through them, and on this bolt, between the plates G, l
- a pawl I
- J represents another pawl, pivoted between the plates G G at a point a suitable distance inward from and below the pivot of the pawl I when the lever is in a horizontal position, as shown in Fig. 2.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Description
H. W. CRNELL.
Lifting-lacks.
N0..l52,6`08 Y Patented .lune 30,1874.
WITNESSES. INVENTUR Attorneys.
UNITED STATES.` PATENT QEFICE.
HARMON W. CORNELL, OF OVVEGO, NEW YORK.
IMPROVEMENT IN LIFTINGYJACKS.
Specification forming part of Letters Patent No. 152,608, dated June 30, 1874; application lled Masr 21, 1874.
To all 'whom it may concern:
Beit known that I, HARMON W. CORNELL, of Owego, in the county of Tioga and in the State of New York, have invented certain new and useful Improvements in Liftin g-Jack; and do hereby declare that 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, making a part of this specification.
The nature of my invention consists in the construction and arrangement of a lifting-j ack, as will be hereinafter more fully set forth.
In order to enable vothers 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 side elevation of my liftingjaclr. Fig. 2 is a longitudinal section of the operating lever and pawls, with a part of the movable upright. Fig. 3 is a horizontal section through the line .r x, Fig. l. Figs. 4 and 5 are cross-sections of the handle through the lines g/ y and x m, respectively.
A represents the base or bed piece ot' my lifting-jack, upon which is firmly secured an upright standard. In a sin gle-lever jack this standard is constructed, as shown in Fig. 3, of two uprights, B B, with a back, B1, and two front cross-bars, I32 B2, firmly bolted thereto. In a double-lever jack the back B1 is omitted, and two cross-bars used on this side also. In
' this upright standard is placed the movable cured plates E E, which extend inward in front of the movable upright C close to the rack-bar a. On each of the plates E is a forward-projecting ange, E', said plate and iiangc, with braces b b, being all cast in one piece, as shown. G represents the operatinglever, on each side of which, at the inner end, is secured a cast plate, G'. These plates are each provided with a ange, d, on the upper edge, and a ange, d', on the lower edge, which flanges extend inward and t over the top and bottom of the lever G. The plates G G are pivoted between the anges E E by means of a single bolt, f, passing through them, and on this bolt, between the plates G, l
is pivoted a pawl, I, to engage in the rackbar a ot' the movable upright C. J represents another pawl, pivoted between the plates G G at a point a suitable distance inward from and below the pivot of the pawl I when the lever is in a horizontal position, as shown in Fig. 2.
When the lever G s worked up and down the pawl I retains the same relative position to the movable upright C and its rack-bar a, while the pawl J moves downward when the lever is raised, and upward when the lever is depressed; hence, when the lever is elevated, the pawl I will hold the lnovable upright steady in place, while the pawl J will move downward to take a new hold on the rack-bar, and when the lever is pressed down said pawl J will raise the movable upright and lift the article under which the jack is placed. g
For very heavy work two levers are usedone on each side-as shown by dotted lines in Fig. l, in which ease the baci; B1 of the stationary standard is omitted, as above mentioned, and the movable upright provided 'with another raelibar.
May, 1874.
H. w. CORNELL.
Titnesses A. N. MARR, U. L. EVERT.
Publications (1)
Publication Number | Publication Date |
---|---|
US152608A true US152608A (en) | 1874-06-30 |
Family
ID=2222019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US152608D Expired - Lifetime US152608A (en) | Improvement in lifting-jacks |
Country Status (1)
Country | Link |
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US (1) | US152608A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2575146A (en) * | 1947-05-02 | 1951-11-13 | Raymond R Thomas | Pipe line scraper inserter and remover |
-
0
- US US152608D patent/US152608A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2575146A (en) * | 1947-05-02 | 1951-11-13 | Raymond R Thomas | Pipe line scraper inserter and remover |
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