GB161303A - Improvements in ratchet jacks - Google Patents
Improvements in ratchet jacksInfo
- Publication number
- GB161303A GB161303A GB100120A GB100120A GB161303A GB 161303 A GB161303 A GB 161303A GB 100120 A GB100120 A GB 100120A GB 100120 A GB100120 A GB 100120A GB 161303 A GB161303 A GB 161303A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lifting
- pawl
- bar
- spring
- holding
- 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
Links
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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Forging (AREA)
Abstract
161,303. Percival, S., (Duff Manufacturing Co.). Jan. 12, 1920. Jacks.-In a ratchet-jack mechanism of the type comprising holding and lifting pawls connected by a band spring, the spring is formed as an open bow with the intermediate portion of its back having a depression for co-operation with a reversing-lever, and the casing is made in two forged metal parts. The lifting-bar 41 is operated step by step by a lifting-pawl 51 pivoted on the end of the operating-handle 49. and held between the steps by a holding- pawl 52 connected with the lifting- pawl by a spring 58. The nose 64 of a reversing-lever 62 is pressed into a notch 61 in the spring, when raising, both pawls being thereby pressed against the ratchet teeth, and each downward movement of the handle 49 raises the lifting-bar through one step, the holding-pawl then retaining the bar whilst raising the handle. The nose of the reversing-lever is disengaged from the spring when lowering. During the lowering movement of the lifting- bar the spring is in tension and causes first the engagement of the holding-pawl with the ratchet tooth above that previously engaged, and then, when the load is on the holding pawl, the disengagement of the lifting-pawl. As the lifting-pawl is raised, the spring comes into compression and engages the lifting pawl with the next tooth. The lifting-bar is provided with an upper lifting-head 43 and a lever toe-lift bar 46 adapted to be attached in various positions on the lifting-bar. The ratchet mechanism is contained in the parts 5, 6, and the lifting-bar in the parts 4 of the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB100120A GB161303A (en) | 1920-01-12 | 1920-01-12 | Improvements in ratchet jacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB100120A GB161303A (en) | 1920-01-12 | 1920-01-12 | Improvements in ratchet jacks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB161303A true GB161303A (en) | 1921-04-12 |
Family
ID=9714406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB100120A Expired GB161303A (en) | 1920-01-12 | 1920-01-12 | Improvements in ratchet jacks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB161303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR20160100046A (en) * | 2016-02-08 | 2017-10-23 | Σταυρος Κυριακου Κιζηρογλου | A tool for the easy making of bed |
-
1920
- 1920-01-12 GB GB100120A patent/GB161303A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR20160100046A (en) * | 2016-02-08 | 2017-10-23 | Σταυρος Κυριακου Κιζηρογλου | A tool for the easy making of bed |
| GR1009787B (en) * | 2016-02-08 | 2020-08-03 | Σταυρος Κυριακου Κιζηρογλου | A tool for the easy making of bed |
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