US157663A - Improvement in lifting-jacks - Google Patents
Improvement in lifting-jacks Download PDFInfo
- Publication number
- US157663A US157663A US157663DA US157663A US 157663 A US157663 A US 157663A US 157663D A US157663D A US 157663DA US 157663 A US157663 A US 157663A
- Authority
- US
- United States
- Prior art keywords
- jacks
- lifter
- standard
- lifting
- 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
Links
- 230000036633 rest Effects 0.000 description 2
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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
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/02—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with racks actuated by pinions
Definitions
- My invention relates to that class of lif ing-jacks in which a notched lifter is moved up and down upon a standard; and the nature of my invention consists in a notched lifter provided with vertical grooves on its sides, into-Which grooves fit flanged studs, which are secured to the front of the standard,the said lifter being provided with a rackbar, into which works the segmental end of a lever, all as more fully hereinafter set forth.
- A represents a standard, rested upon a base
- this lifter has a groove, H, on each side, and into these grooves the flanges on the studs F enter to hold it to the standard and allow it to be moved freely up or down.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
Description
R. WHITTEMBRE.
Lifting-Jacks.
Patented Dec. 8, 1874.
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UNITED STATES PATENT ()FFIGE.
JOHN R. WHITTEMORE, OF GHICOPEE FALLS, MASSACHUSETTS.
IMPROVEMENT IN LlFTlNG-JACKS.
Specification forming part of Letters Patent No. 157,663, dated December 8, 1874; application filed May 18, 1874.
To all whom it may concern:
Be it known that I, JOHN R. WHITTEMORE, of Ohicopee Falls, Hampden county, Massachusetts, have invented certain new and useful Improvements in Lifting-Jacks; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings making a part of this specification, in which Figure 1 represents a side view with one side of the standard broken away at the top. Fig. 2 represents a front view, and Fig.3 a view of the catch which holds the lever in place. a
My invention relates to that class of lif ing-jacks in which a notched lifter is moved up and down upon a standard; and the nature of my invention consists in a notched lifter provided with vertical grooves on its sides, into-Which grooves fit flanged studs, which are secured to the front of the standard,the said lifter being provided with a rackbar, into which works the segmental end of a lever, all as more fully hereinafter set forth.
A represents a standard, rested upon a base,
' and having an open mortise at the top, into which is pivoted a lever, 0, having a segment at its end provided with cog-teeth. Upon the front of the standard are four flanged studs, F F F F, which are secured apart from each other by the screws G. B represents the lifter, which is inclined rearward at the upper part, and having notches b in stair-step form, so
that the top thereof extends over the top of.
the standard, while the lower part of the same rests against the front of the standard. The
straight portion of this lifter has a groove, H, on each side, and into these grooves the flanges on the studs F enter to hold it to the standard and allow it to be moved freely up or down.
lever against the same. The lit'teris perfectly guided in its up and-down movements by means of the grooves therein and the flanged studs.
Whenever itis necessary to remove the lifter it is only necessary to loosen two of the flanged studs on the same side, turn them on the screws,
and lift out the lifter B from the two nnloosened studs.
I do not claim a lifting iack in which an inclined notched lifter slides on a standard, and is operated by means of a segment acting upon a swinging rack-bar on the exterior of the lifter, as I am aware that such is now new.
What I claim is-- The combination, with the standard A, of the flanged studs F F and the lifter B, having vertical grooves H on its sides, all substantially as set forth.
JOHN R. WHITTEMORE. [L. 8.]
Witnesses:
I. W. SMITH, A. It. MARTIN.
Publications (1)
Publication Number | Publication Date |
---|---|
US157663A true US157663A (en) | 1874-12-08 |
Family
ID=2227073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US157663D Expired - Lifetime US157663A (en) | Improvement in lifting-jacks |
Country Status (1)
Country | Link |
---|---|
US (1) | US157663A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020157663A1 (en) * | 2001-03-20 | 2002-10-31 | Rick Blacker | Nebulizer apparatus and method |
-
0
- US US157663D patent/US157663A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020157663A1 (en) * | 2001-03-20 | 2002-10-31 | Rick Blacker | Nebulizer apparatus and method |
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