US141919A - Improvement in hoisting-jacks - Google Patents
Improvement in hoisting-jacks Download PDFInfo
- Publication number
- US141919A US141919A US141919DA US141919A US 141919 A US141919 A US 141919A US 141919D A US141919D A US 141919DA US 141919 A US141919 A US 141919A
- Authority
- US
- United States
- Prior art keywords
- jacks
- hoisting
- improvement
- rack
- lever
- 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
- 241000042032 Petrocephalus catostoma Species 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- Figure 1 represents a vertical longitudinal section on the line 0 0, Fig. '2; and Fig. 2, a horizontal section on the line a: m, Fig. 1.
- the object of my invention is to construct a hoisting-jack which is easily operated, effective in action, and readily adjusted to different heights.
- My invention consists of a bell-crank lever with treadle, which acts by means of an intermediate connecting-rod and weighted link on a sliding rack, guided between a strong frame.
- A represents the frame of the jack, consisting of a bottom part, B,'and two parallel uprightposts or pillars, O, of wood, metal, or other suitable material.
- the bellcrank lever D is pivoted at a to the lower part of pillars O, and provided at its forward projecting arm with a treadle for applying the foot, so as to leave the hands free for adjustingthe sliding rack to the objects to be hoisted.
- the upward-extending arm of lever D is pivoted at its end to the intermediaterod E, which connects again at its upper end with a weighted link, F, which looks into the teeth of a sliding rack, G.
- Rack G is guided in longitudinal slot (Lon strong connecting-bolts 1) between the pillars G.
- the upper end of rack G is applied in suitable manner to the object, and the rack placed into iposition by raising the lower arm of lever D and sliding rack G'till link F engages it at the required height. Bythen lowering lever D the rack G is raised by the action of y the intermediate rod E and link F. The obdescribed.
- PAUL GOEPEL ALEX. F. Itonnnrs.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Description
L H. SHURCH iLL.
Hoisting-Jacks.
No. 141 91 9. 4 Patented Augusti9fl873. 77
mrneys,
AMPHOTO-LITHUGRAPHIC co. Am(oseomvslc Pn csss) UNITED STATES PATENT OFFICE.
JOHN H. CHURCHILL, OF CROSS RIVER, NEW YORK.
IMPROVEMENT IN HOlSTING-JACKS.
Specification forming part of 'Letters Patent No. 1 1L919, dated August 19, 1873 application filed July 2f3, 1873.
T0 all whom it may concern:
Be it known that I, JOHN H. CHURCHILL, of Cross River, in the county of Westchester and State of New York, have invented a new and Improved Hoistin g-Jack, of which the following is a specification:
In the accompanying drawing, Figure 1 represents a vertical longitudinal section on the line 0 0, Fig. '2; and Fig. 2, a horizontal section on the line a: m, Fig. 1.
' Similar letters of reference indicate c0rre-' spondin g parts.
The object of my invention is to construct a hoisting-jack which is easily operated, effective in action, and readily adjusted to different heights. My invention consists of a bell-crank lever with treadle, which acts by means of an intermediate connecting-rod and weighted link on a sliding rack, guided between a strong frame.
In the drawing, A represents the frame of the jack, consisting of a bottom part, B,'and two parallel uprightposts or pillars, O, of wood, metal, or other suitable material. The bellcrank lever D is pivoted at a to the lower part of pillars O, and provided at its forward projecting arm with a treadle for applying the foot, so as to leave the hands free for adjustingthe sliding rack to the objects to be hoisted. The upward-extending arm of lever D is pivoted at its end to the intermediaterod E, which connects again at its upper end with a weighted link, F, which looks into the teeth of a sliding rack, G. Rack G is guided in longitudinal slot (Lon strong connecting-bolts 1) between the pillars G.
The upper end of rack G is applied in suitable manner to the object, and the rack placed into iposition by raising the lower arm of lever D and sliding rack G'till link F engages it at the required height. Bythen lowering lever D the rack G is raised by the action of y the intermediate rod E and link F. The obdescribed.
JOHN H. CHURCHILL.
Witnesses:
PAUL GOEPEL, ALEX. F. Itonnnrs.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US141919A true US141919A (en) | 1873-08-19 |
Family
ID=2211332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US141919D Expired - Lifetime US141919A (en) | Improvement in hoisting-jacks |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US141919A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050061145A1 (en) * | 2003-09-24 | 2005-03-24 | Siemens Westinghouse Power Corporation | Metal gas separation membrane |
-
0
- US US141919D patent/US141919A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050061145A1 (en) * | 2003-09-24 | 2005-03-24 | Siemens Westinghouse Power Corporation | Metal gas separation membrane |
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